To see the other types of publications on this topic, follow the link: Vacuum cleaner.
Dissertations / Theses on the topic 'Vacuum cleaner'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Vacuum cleaner.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Bergman, Joel, and Johan Lind. "Robot Vacuum cleaner." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264502.
Full textAbstract:
Although a robot vacuum cleaner is a well-known product, development is still interesting. Better working sensors and more sophisticated algorithms and sensors are used in new cleaners. The purpose with this thesis was to learn more about different sensors, algorithms, and designs of robot vacuum cleaners, to try ideas and to find improvements to implement on the demonstrator. The initial work was to make a market investigation to find customer needs and expectations. Also making a rough design and layout for the mechanical and electrical system. The budget for the demonstrator was 1000 SEK. Using laser cut plastic sheets, 3D printed parts, and receiving motors for free, costs did not exceed budget. Literature and theses in the area of interest were studied to find answers to some of the research questions. The theses studied subjects such as driving pattern and designs to find back to charge station. Some ideas for driving patterns were implemented on a demonstrator. The development method used was iteration of finding useful information, testing components, codes and also the complete demonstrator. The components used were DC motor, stepper motors, ultrasonic sensors, Arduino mega micro controller, switches and AA batteries. The different components required different voltage and the stepper motors used driver cards.Även om robot dammsugare är en välkänd produkt är produktutveckling fortfarande intressant. Bättre sensorer och mer sofistikerade algoritmer och sensorer används i dammsugare. Syftet med denna avhandling var att lära sig mer om olika dammsugare, algoritmer och konstruktioner av robot dammsugare, för att prova idéer och möjliga hitta förbättringar att implementera på demonstranten. Det första arbetet var att göra en marknadsundersökning för att hitta kundens behov och förväntningar. Även att göra en grov design och layout för det mekaniska och elektriska systemet. Budgeteringen för demonstranten var 1000 kr. Kostnaderna översteg inte budgeten eftersom vi använde oss av laser skurna plastplattor, 3D-printade delar och erhöll motorer utan kostnad. Sex olika avhandlingar studerades för att hitta svar på några av frågorna. Avhandlingarna studerade ämnen som körmönster och mönster för att hitta tillbaka till laddstationen. Vissa idéer för körmönster implementerades på demonstranten. Den använda utvecklingsmetoden var iteration av att hitta användbar information, testa komponenter, koder och även den fullständiga demonstranten. De komponenter som användes var likströmsmotor, stegmotorer, ultraljudssensorer, Arduino mega-mikrokontroller, strömbrytare och AA-batterier. De olika komponenterna krävde olika spänningar och stegmotorn använder ett specifikt drivkort.
2
Torgilsman, Christoffer, and Eric Bröndum. "Ethical Hacking of a Robot Vacuum Cleaner." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277918.
Full textAbstract:
This study revolves around the safety of IoT devices, more specifically how safe the robot vacuum cleaner Ironpie m6 is. The method is based on threat modeling the device, using the DREAD and STRIDE models. The threats with the highest estimated severity were then penetration tested to see which security measures are implemented to protect against them. Using client side manipulation one vulnerability was found in Trifo’s mobile application ”Trifo home” which could be used to harm customers property.Den här studien kretsar kring IoT enheters säkerhet, mer specifikt hur säker robotdammsugaren Ironpie m6 är. Metoden är baserad på att hotmodellera enheten med hjälp av DREAD och STRIDE modellerna. Dem allvarligaste hoten blev penetrationstestade för att se vilka säkerhetsåtgärder som har blivit implementerade for att skydda produkten från dem. En sårbarhet upptäcktes i Trifos mobilapplikation ”Trifo Home” som kunde exploiteras via manipulation av klient sidan. Denna sårbarhet kunde användas för att skada kunders ägodelar.
3
Mets, Kiritsis Lea. "Can cheap robotic vacuum cleaners be made more efficient? : A computer simulation of a smarter robotic vacuum cleaner." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230228.
Full textAbstract:
Robotic vacuum cleaners are popular domestic robots that clean floors without human intervention. The purpose of this report is to study how cheap robotic vacuum cleaners’ navigation pattern can be improved. This is achieved by simulating two models of robotic vacuum cleaners, one “simple” and one “smart”, both relying on the knowledge that cheap sensors can provide about the surrounding environment. As the results show how the smart robot is better than the simple robot in all simulations in terms of floor coverage, the results are considered successful. The fact that the simulations are simplified versions of real-life robotic vacuum cleaners is discussed, and future work could consider examining more realistic simulations or experiment on real-life robotic vacuum cleaners.Robotdammsugare är populära hushållsrobotar som städar golv utan människors inblandning. Syftet med den här rapporten är att undersöka hur billiga robotdammsugares navigeringsmönster kan förbättras. Detta görs genom att simulera två modeller av robotdammsugare, en "simpel" och en "smart", där båda förlitar sig på information som billiga sensorer kan ge om omgivningen. Resultaten anses vara lyckade då de visar hur den smarta roboten presterar bättre än den simpla roboten i alla simulationer. Faktumet att simulationerna är simplifierade versioner av verkliga robotdammsugare diskuteras och framtida forskning kan undersöka mer realistiska simulationer eller experimentera med riktiga robotdammsugare.
4
Svensson, Hanna. "Plush Plate Alternatives : – New solutions for vacuum cleaner nozzles." Thesis, KTH, Maskinkonstruktion (Inst.), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-100888.
Full textAbstract:
Detta examensarbete utfördes på Electrolux Floor Care and Small Appliences AB i Stockholm på deras primärutvecklingsavdelning. Syftet med projektet var att ta fram ett alternativ till dagens plysh-plattor, placerade på dammsugarmunstycket, som har som funktion att ta upp hår och fibrer från, i första hand, mattor. Electrolux utvecklingsprocess, Product Creation Process, användes genom hela arbetet med några mindre anpassningar. Initialt gjordes en undersökning av hur Electrolux munstycken fungerar idag för att få en grundläggande förståelse för hur en lösning skulle kunna se ut och hur den skulle kunna påverka dammupptagningen. En brainstorming gjordes och ungefär 11 idé-förslag togs fram. Därefter påbörjades tester av både material- och formberoende lösningar. Flera av de mest lovande koncepten som sedan utvecklades kommer att utelämnas ur denna rapport då uppgifterna ansågs som känsliga på grund av eventuella patentansökningar. Koncepten togs fram och utvärderades med hjälp av några av de metoder som presenteras i början av detta arbete. Detta ledde slutligen till två koncept av vilka ett antal prototyper tillverkades och testades. Den slutliga lösningen visade sig fungera bra i tester. Det var från början meningen att det skulle vara två lösningar utvecklade från de två slutkoncepten. Dock kunde inte det företag som lovat producera den ena lösningen leverera i tid och detta gjorde att detta koncept inte kunde testas och utvärderas inom ramen för detta arbete. Konceptet i sig var dock så intressant att vidare tester skall utföras både på detta och på slutkonceptet.This Final thesis was performed at Electrolux Floor Care and Small Appliances AB in Stockholm in their primary development department. The purpose with the project was to find an alternative for today’s plush plate, placed on the vacuum cleaner nozzle, whose function is to pick up hair and fiber mainly from carpets. The Electrolux development process, the Product Creation Process, was used throughout the entire project with minor adjustments to fit the time plan and size of the project. Initially a study was made of the Electrolux vacuum cleaner nozzles to get a basic understanding of how a solution could look and how it could affect the dust pick-up capacity of the nozzle. A brainstorming session was executed and 11 suggestions for ideas were created. After this a number of tests where performed, both material- and shape-oriented ones. A number of the more promising concepts that was developed further will be excluded from this thesis due to patent issues. Concepts was developed and evaluated with help of the methods that are being presented in the beginning of this thesis. This finally led to two concepts of which a number of prototypes were constructed and tested. The final solution proved to function well in tests. From the beginning it was meant to be two solutions developed from the two final concepts. The company that was supposed to deliver one of them could not do so within the time limits and this led to the fact that this concept could not be tested and evaluated within the timeframe of this project. The concept proved to be so interesting though, that it was decided to go on with further testing both on this concept and the other one.
5
Schilling, Benjamin Fritz. "Robotic vacuum cleaner design to mitigate slip errors in warehouses." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/114052.
Full textAbstract:
Thesis: M. Eng. in Advanced Manufacturing and Design, Massachusetts Institute of Technology, Department of Mechanical Engineering, 2017.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 83-84).
Warehouses are extremely dusty environments due to the concrete and cardboard dust generated. This is problematic in automated warehouses that use robots to move items from one location to another. If the robot slips, it can collide with other robots or lose track of where it is located. Currently, to reduce the amount of dust on the floor, warehouses use industrial scrubbers that users walk behind or ride. This requires manual labor and a regular scheduled maintenance plan that needs to be followed to mitigate the dust accumulation. Therefore, an industrial robotic vacuum cleaner that can continuously clean the warehouse floors is proposed. The five key parts to a vacuum are inlet duct, brush roller, filtration, storage, and suction. This thesis will discuss in detail the design and development of the filtration, storage, and suction of the robotic vacuums that were developed in this project. The thesis will go through design considerations and computational fluid dynamics that were conducted to validate and improve the design. Then, it will discuss the experimental results of the robotic vacuum cleaners.
by Benjamin Fritz Schilling.
M. Eng. in Advanced Manufacturing and Design
6
Lans, Patrik. "Numerical Methods for Simulating Separation in a Vacuum Cleaner Cyclone." Thesis, KTH, Mekanik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-194498.
Full textAbstract:
This thesis includes a numerical comparison of different turbulence models and particle models in terms of convergence time and physical accuracy. A cyclone is used as the computational domain. Cyclones are common devices for separating two or more substances. The work is divided into an experimental part and a numerical part. In the experiments, characteristics of the cyclone were measured. This data is then used to evaluate different numerical modeling approaches. The numerical part consists of two parts, namely single phase flow and multiphase flow, where different modeling aspects are examined and presented. Furthermore, important parameters that characterize a cyclone, such as pressure drop and separation efficiency, are calculated. The separation efficiency, i.e. how much dust that actually goes to the dust bin, is calculated for two different types of dust. The software used for the numerical simulations has been Star-CCM+.
7
Blomqvist, Anneli. "Millimeter Wave Radar as Navigation Sensor on Robotic Vacuum Cleaner." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-288146.
Full textAbstract:
Does millimeter-wave radar have the potential to be the navigational instrument of a robotic vacuum cleaner in a home? Electrolux robotic vacuum cleaner is currently using a light sensor to navigate through the home while cleaning. Recently Texas Instruments released a new mmWave radar sensor, operating in the frequency range 60-64 GHz. This study aims to answer if the mmWave radar sensor is useful for indoor navigation. The study tests the sensor on accuracy and resolution of angles and distances in ranges relevant to indoor navigation. It tests if various objects made out of plastic, fabric, paper, metal, and wood are detectable by the sensor. At last, it tests what the sensor can see when it is moving while measuring. The radar sensor can localize the robot, but the ability to detect objects around the robot is limited. The sensor’s absolute accuracy is within 3° for the majority of angles and around 1dm for most distances above 0.5 m. The resolution for a displacement of one object is 1°, respectively 5 cm, and two objects must be located at least 14° or 15 cm apart from each other to be recognized. Future tasks include removing noise due to antenna coupling to improve reflections from within 0.5 meter and figure out the best way to move around the sensor to improve the resolution.Har radar med millimetervågor förutsättningar att vara navigationsutrustning för en robotdammsugare i ett hem? Electrolux robotdammsugare använder för närvarande en ljussensor för att navigera genom hemmet medan den städar. Nyligen släppte Texas Instruments en ny radarsensor med vågor i frekvensområdet 60-64 GHz. Denna studie syftar till att svara om radarsensorn är användbar för inomhusnavigering. Studien testar sensorn med avseende på noggrannhet och upplösning av vinklar och avstånd i områden som är relevanta för inomhusnavigering. Den testar om olika föremål tillverkade av plast, tyg, papper, metall och trä kan detekteras av sensorn. Slutligen testas vad sensorn kan se om den rör sig medan den mäter. Radarsensorn kan positionera roboten, men hinderdetektering omkring roboten är begränsad. För det mesta ligger sensorns absoluta noggrannhet inom 3° för vinklar och omkring 1dm för avstånd över 0,5 m. Upplösningen för en förflyttning av ett objekt är 1° respektive 5 cm, och två objekt måste placeras minst 14° eller 15 cm ifrån varandra för att båda kunna upptäckas. Kommande utmaningar är att ta bort antennstörningar som ger sämre reflektioner inom 0,5 meter och ta reda på det bästa sättet att förflytta sensorn för att förbättra upplösningen.
8
Rašínová, Jitka. "Design průmyslového vysavače." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319487.
Full textAbstract:
The thesis is focused on design of industrial vacuum cleaner for use in workshops. The thesis includes design and technical reaserch of current vacuum cleaners. The main part contains original design solution with regard to technical and ergonomics requirements.
9
Culpepper, Martin L. (Martin Luther). "Design of debris cleaner with compound auger and vacuum pick up." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43326.
Full text
10
Hertzberg, Samuel, and Daniel Dahlgren. "Optimal Placement of a Charging Station for a Robotic Vacuum Cleaner." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229763.
Full textAbstract:
Robot vacuum cleaners are used in many domestic and industrial appliances around the world today. The vacuum cleaners have a certain goal: To clean an area in a set amount of time. It does so by applying different techniques based on information from its different sensors.However, the efficiency might vary from robot to robot. The variations are a product of many things as the problem is fairly complex.This paper will measure the variations due to point of entry. In a statistical analysis on a simulated dataset results showed that point of entry does affect the robot vacuum cleaner in some cases. Of the two algorithms simulated in this paper, the random bump algorithm showed little to no benefit at all. Whereas the spiral algorithm showed up to a 20% increase in efficiency due to point of entry.Robotdammsugare används i många hushåll och industriella tillämpningar runt om i värden idag. Robotdammsugare har ett visst mål: att städa en yta inom en viss tid. Den gör det genom att använda olika tekniker beroende på informationen det får från sina sensorer. Dock kan effektiviteten variera mellan robot och robot. Variationerna beror på många olika saker då problemet är komplext. Denna rapport kommer att mäta variationer som uppstår på grund av startposition. I en statistisk analys på ett genererat dataset visade resultaten att i några fall påverkar startpositionen robotdammsugaren. Med en av de två algoritmerna som simulerades i detta arbete, random bump algoritmen, visade det sig inte spela stor roll. Medans den andra algoritmen, spiralalgoritmen, kunde bli upp till 20% mer effektiv på grund av startposi-tionen.
11
Larsson, Forsberg Albin, and Theodor Olsson. "IoT Offensive Security Penetration Testing : Hacking a Smart Robot Vacuum Cleaner." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254233.
Full textAbstract:
IoT devices can be found in almost any type of situation as the availability and viability of them has surged in the last decade with technological advancements. The purpose of this project is to investigate how secure these types of devices, in particular a robot vacuum cleaner, actually are if an ill intended actor tries to interfere with the device. Different methods used in the sphere of threat modeling and penetration testing were applied and tested with the result coming back positive. The robot vacuum cleaner was successfully compromised and the privacy of the owner could be violated applying the attacks used. The current way of thinking about privacy and security of IoT devices could therefore need to be reviewed.
12
Voss, Emy. "Light up the dust : Development of a vacuum cleaner nozzle with lights." Thesis, KTH, Maskinkonstruktion (Inst.), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142442.
Full textAbstract:
This master thesis was conducted during the fall of 2012 at Electrolux with the purpose of developing a vacuum cleaner nozzle with lights. Several nozzles with an integrated lighting system can be found on the market today. However, most of these nozzles are provided with power through cords from the vacuum cleaner body which results in the nozzle only being compatible with specially designed vacuum cleaners. This project aimed at developing an ordinary vacuum cleaner nozzle with lights, being compatible with regular vacuum cleaners. The development was performed by doing modifications to an already existing vacuum cleaner nozzle.The overall method applied during this master thesis was based on an in-house process which is used at Electrolux where the progress is divided into four phases. Each phase ends with a presentation for a project steering committee consisting of experts from Electrolux with a profound interest in the project.The project began with a pre study where existing products and patents were investigated. Furthermore all wishes and constraints of the product were compiled into a list of design specifications. The product development was broken down into three sub problems; how to supply the lights with electricity, how to activate and deactivate the lights and how to integrate the lights to the nozzle. To generate as many ideas as possible regarding the three sub problems, semi-structured interviews and a brainstorming session were conducted together with employees at Electrolux. The most interesting ideas were further developed as concepts and the best solutions to each sub problem were eventually chosen together with the project steering committee.The final solution had four LED lights positioned on top of the nozzle and these were powered by two serial connected AAA batteries. The lights were activated and deactivated automatically when the vacuum cleaner was turned on an off. However, the final method used for activating and deactivating the lights is not further explained in this report due to business strategic reasons of Electrolux. Experiments were conducted to choose the components of the suggested solution. To boost the output voltage in order to receive a stable illumination some electronics were connected to the components. The suggested nozzle did fulfill all constraints stated in the product design specificationsDetta examensarbete utfördes under hösten 2012 på Electrolux med syftet att utveckla ett dammsugarmunstycke med lampor. Idag finns en rad dammsugarmunstycken med integrerade lampor på marknaden, men de flesta av dessa munstycken får ström genom sladdar dragna från själva dammsugaren vilket medför att munstyckena endast är kompatibla med specialdesignade dammsugare. Detta arbete syftade till att utveckla ett vanligt dammsugarmunstycke med lampor som kan användas till de flesta dammsugare och är fristående från resterande delar. Utvecklingen gjordes genom att modifiera ett redan existerande dammsugarmunstycke.Den övergripande metoden som använts under detta examensarbete baserades på en intern process som används på Electrolux där arbetet delas in i fyra faser. Vardera fasen avslutas med en presentation för en styrgrupp bestående av experter från Electrolux med ett intresse för projektet. Arbetet inleddes med en förstudie där existerande produkter och patent studerades. Vidare sammanställdes alla krav och önskemål angående produkten till en kravspecifikation.Produktutvecklingen delades in i tre delproblem; drivning av lamporna, integrering av lamporna i munstycket samt aktivering och avaktivering av lamporna. För att generera så många idéer som möjligt angående de tre delproblemen utfördes semistrukturerade intervjuer samt en brainstormingsession tillsammans med anställda på Electrolux. De mest intressanta lösningarna vidareutvecklades till koncept varpå den bäst lämpade lösningen för varje delproblem valdes ut tillsammans med styrgruppen.Den slutliga lösningen hade fyra LED-lampor placerade ovanpå munstycket vilka drevs av två AAA-batterier. Lamporna aktiverades samt avaktiverades automatiskt i samband med att dammsugaren sattes på respektive stängdes av. Av företagsstrategiska skäl förklaras den slutliga metod som användes för att aktivera samt avaktivera lamporna inte närmare i denna rapport. För att avgöra vilka specifika komponenter som skulle användas utfördes experiment. Elektronik kopplades också till komponenterna med anledning av att förstärka den utgående spänningen för att få en mer jämn belysning. Det föreslagna munstycket uppfyllde samtliga krav som ställts upp i kravspecifikationen
13
Miniotaité, Jura. "JoyTilt : Beyond GUI App Design for Embodied Experience of Controlling a Robot Vacuum Cleaner." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-294338.
Full textAbstract:
Domestic IoT appliances like smart speakers, smart locks and robot vacuum cleaners are usually connected through smartphone apps to provide additional functionality and remote control. Although smartphones have many different sensors and actuators, these apps provide a primarily graphical user interface with these appliances. To explore a more somatically engaging experience the prototype JoyTilt was designed, developed and tested with users. JoyTilt enables its user to control a robot vacuum cleaner like a toy car by tilting their phone in the direction they want it to go. This study found that the participants had their gaze focused on the robotic vacuum cleaner while controlling it and that the participants had both positive and negative bodily experiences with JoyTilt. Interviews with the participants provide suggestions for balancing control of robot vacuum cleaners and keeping the robot’s autonomy using JoyTilt. In this study the aesthetics of the material, choice of materials and choice of interaction model come together in the design of JoyTilt to shape the human-robot relationship. Lastly, the thesis highlights the values of further considering the bodily experience when designing apps.Uppkopplade produkter för hemmabruk så som smarta högtalare, smarta lås och larm eller robotdammsugare kopplas till våra smartphones via appar som möjliggör ytterligare funktioner, exempelvis fjärrstyrning och schemaläggning. Trots att smartphones innehåller en mängd olika sensorer används i regel primärt grafiskt gränssnitt i dessa appar. Genom att designa, utveckla och testa prototypen JoyTilt utforskas en somaestetisk användarupplevelse med fokus på den fysiska upplevelsen. Med appen JoyTilt kan en robotdammsugare styras likt en radiostyrd bil genom att luta smartphonen. I testerna med JoyTilt hade deltagarna sin blick fästa på robotdammsugaren när de styrde den. Deltagarna hade både positiva och negativa kroppsliga upplevelser av Joytilt. Från intervjuerna med deltagarna kom förslag på sätt att balansera kontroll av robotdammsugaren med dess autonomi med hjälp av JoyTilt. Val av designmaterial, dess estetik och interaktionsmodell bidrog till utformningen av JoyTilt som i sin tur påverkade relationen mellan människa och robot. Slutligen understryker den här studien värdet av att ta den kroppsliga upplevelsen i beaktning och nyttja det ofta förbisedda fysiska designutrymmet i appdesign.
14
Albiz, Philippe, and Sara Glaerum. "The development of a vacuum cleaner concept adapted for storage through human-centred design." Thesis, KTH, Maskinkonstruktion (Inst.), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263842.
Full textAbstract:
Urbanisation and a growing population has created new demands for compact living and households. Household appliances perform an important role in modern homes, where the life-cycle of the products play a significant role. Products that spend most of their time in storage are required to answer new user demands to interplay and integrate into the household, including products such as vacuum cleaners. A master thesis project for KTH Industrial Design Engineering master track, carried out in collaboration with ESSIQ AB, investigated the user needs for vacuum cleaners in-uselifecycle. The research question was: How can a vacuum cleaner be designed and adapted to facilitate compact and easy storage for the user in a modern home, without compromising its current efficiency? The goal of the project was to design an innovative product concept through a human-centred design methodology. The methodology would lead to the creation of a product designed to fulfil the user needs by focusing on user experience. Knowledge about how vacuum cleaners are stored, used, interact and how it is interpreted in everyday life, were firstly found and then analysed. To develop a suitable concept proposal, needs and requirements were gathered through interviews and observations. New concept ideas were generated and evaluated through an iterative process resulting in the development of a final concept proposal. A proof-of-concept was developed to further support the final concept. The concept is a proposal for future development and introduces a new product category.Urbanisering och en växande population ställer nya krav för kompakta och smarta ekosystem. Hemelektronik spelar en viktig roll i många moderna hem och är betydande för ett fungerande hushåll. Produkter som spenderar mesta av sin tid i förvaring erhåller således en essentiell funktion i ett ekosystem för individen, sådana produkter inkluderar dammsugare. Ett masterexamensarbete för den Kungliga Tekniska Högskolan, KTH, mastersprogram i Industridesign, utfördes tillsammans med ESSIQ AB för att undersöka de användarbehov som finns på dammsugare under sin livscykel. Problemformuleringen utgjordes av: Hur kan en dammsugare bli designad och anpassad för en användare, för att ge en kompakt och smidig förvaring i ett modernt hem, utan att kompromissa på sin nuvarande effektivitet? Målet för detta projekt var att designa ett innovativt koncept genom en användarfokuserad designmetod. En användarfokuserad process inkluderar en definition av användarens behov och fokuserar på att skapa en produkt utefter användarupplevelsen som svarar på de funna behoven. Hur dammsugaren förvaras, används, interagerar och hur den upplevs i det vardagliga livet, undersöktes för att kunna uppfylla målet. Ett anpassat konceptförslag var utvecklad genom identifiering av behov och problem hos användaren funna i intervjuer och tester. Idegenerering på nya konceptförslag utvecklades och utvärderades till ett slutgiltigt konceptförslag. Resultaten resulterade i ett konceptbevis, ett konceptförslag som uppfyller användarens behov. Konceptet fungerar som ett förslag och en grund för fortsatt arbete samt introducerar för en ny typ av produktkategori.
15
Leffler, Jens, and Christoffer Sörmark. "Beating the carpet : Developing an active vacuum cleaner nozzlefor high carpet performance using less energy." Thesis, KTH, Maskinkonstruktion (Inst.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156891.
Full textAbstract:
The power use of vacuum cleaners accounts for a substantial share of the total energy demand in the European Union. This partly due to the common notion associating good vacuum cleaner performance to high input power. To regulate this European Commission will introduce a energy labeling standard from September 2014 that will enforce a power cap for vacuum cleaners and classify them according to energy efficiency, cleaning performance, dust-emission and sound power level. One company currently trying to adapt their products to this label is Electrolux. The one performance criterion that is currently the furthest from being reached is the level of dust pick up on carpet ( dpuc). Traditionally, motorized vacuum cleaner nozzles with agitators, so called active nozzles, pick up more dust on carpet than other (passive) nozzles. The aim of this thesis has been to investigate whether it is possible for an Electrolux canister vacuum cleaner system to achieve the highest energy efficiency class – A to A+++ – while maintaining a good cleaning performance – class C or better – on carpet. This was done by constructing an active nozzle which performed well on carpet on low input power. An Electrolux active nozzle was adapted to function better with lower airflows and less vacuum. Several prototypes of different agitators were developed and tested in the nozzle according to industry standard testing methods. It was concluded from testing that it was possible to reach the higher classes – A to A+++ – in energy efficiency while maintaining a good cleaning performance class.Dammsugare står för en stor del av energikonsumtionen inom EU. Detta dels på grund av att höga ineffekter i dammsugare traditionellt har blivit felaktigt sammankopplat med en bra prestanda hos produkten. För att reglera detta kommer Europakommissionen introducera en ny energietikett för dammsugare från och med september 2014. Med den kommer maxgränser för ineffekt att införas och produkter att klassificeras efter energieffektivitet, städprestanda, återutsläpp av damm och ljudnivå. Ett företag som just nu håller på att anpassa sina produkter till den nya märkningen är Electrolux. Ett av de kriterier som är svårast att nå med en lägre ineffekt är dammupptagning på matta ( dpuc). Generellt är munstycken med motordrivna roterande borstar eller lameller, så kallade aktiva munstycken, bättre på att ta upp damm på matta än andra, så kallade passiva, munstycken. Målet med denna uppsats har varit att undersöka möjligheten för ett dammsugarsystem att uppnå de högsta klasserna i energieffektivitet – A till A+++ – men samtidigt behålla en god dammupptagning – klass C eller bättre – på matta. Detta gjordes genom att anpassa ett aktivt munstycke från Electrolux till ett lägre luftflöde och lägre undertryck. Ett flertal motordrivna borstvalsar togs fram och testades i detta munstycke enligt industristandarden för prestandatester. Det kunde konstateras genom testning att det var möjligt att nå de högre klasserna i energieffektivitet och samtidigt behålla en god dammupptagning.
16
Tina, Monteiro Shelsea. "Real Time Measurement of Dirt Pick-up by a Robotic Vacuum Cleaner using Light Sensing Technology." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254349.
Full textAbstract:
Domestic chores are one of the most tedious and time consuming tasks in a person’s life. A lot of time can be saved and put to better use if these tasks can be automated. One such chore is the routine task of vacuuming the house every day. Robotic vacuum cleaners that clean the house are thus one of the most widely used domestic robots. These robots have the ability to clean the entire house almost autonomously with little or no human intervention. However, most of these robots do not have a system to report the real-time pick up of dirt which can be useful to the user in knowing which parts of his house are dirty and maybe investigate the reason behind it. This information can be useful to the robot as well in determining efficient cleaning patterns based on the dirt localization in the house. In this thesis a prototype was developed to measure the real-time pick-up of dirt by a robotic vacuum cleaner. It uses light sensing technology to measure the amount of dirt picked up and can thus be used to glean which parts of the house are dirtier than the others. The signals can also potentially be used to understand the size of the dirt picked up by the robotic vacuum cleaner. Research was done to investigate the different sensing technologies that can be used and to select the appropriate one. The system was tested and conclusions were made regarding its performance. Additional functions that can be implemented and improvements that can be made have also been suggested as future work.Att städa hemmet är en av de mest tråkiga och tidskrävande uppgifterna i en persons liv. Mycket tid kan sparas och användas bättre om dessa uppgifter kan automatiseras. Robotdammsugare som städar golvet i hemmet är en av de mest använda inhemska robotarna, då dessa robotar har möjlighet att rengöra hela huset nästan autonomt med liten eller ingen mänsklig intervention. De flesta av dessa robotar har dock inte ett system för att rapportera realtidsupphämtning av smuts som kan vara användbart, då användaren kan få reda på vilka delar av huset som är smutsiga och då ha möjlighet att undersöka orsaken bakom. Denna information kan också vara användbart för roboten för att bestämma effektiva rengöringsmönster baserat på lokalisering av smuts i huset. I denna avhandling utvecklades en prototyp för att mäta upptagning av smuts i realtid av en robotdammsugare. Den använder IR-teknik för att mäta mängden smuts som hämtas upp och kan därmed använda informationen för att avgöra vilka delar av huset som är smutsigare än andra. Signalerna kan också potentiellt användas för att förstå storleken på smuts som tas upp. Forskning av olika tekniker utfördes för att kunna välja den mest lämpliga. Systemet testades därefter och slutsatser gjordes avseende dess prestanda. Ytterligare utredningar och förbättringar som kan genomföras har också föreslagits som framtida arbete.
17
Kayhan, Cihan. "Design And Qualification Of A Semi-anechoic Chamber And Investigation Into Noise Characteristics Of A Vacuum Vleaner." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/2/12610107/index.pdf.
Full textAbstract:
In this study a centrifugal fan is studied for noise characteristics and measurements in a semi- anechoic room. A semi-anechoic room is constructed inside Fluid Mechanics Laboratory of Mechanical Engineering Department has been qualified with respect to ISO 3745 standard. The fan characteristic is obtained as proposed in AMCA standards 210-75, by simply measuring the voltage and current of the motor during operation and calculating the power consumption of the assembly. Noise measurements are taken using two microphones attached to a multi-channel data acquisition and processing system in the semi anechoic room. Several different configurations of the vacuum cleaner with some parts removed or replaced systematically are considered during the noise measurements. Some of the results showed that the damping material placed inside the motor cover is proved to be very effective in noise reduction. Two different damping materials are examined for comparative evaluation.
18
Aygun, Buket. "Conceptual Design And Analysis Of An Industrial Type Vacuum Sweeper." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610438/index.pdf.
Full textAbstract:
In this thesis, design and development and manufacturing processes of an industrial type vacuum sweeper is presented. Thesis is financially supported by Ministry of Industry and Trade-Turkey and Müsan A.S. (Makina Ü
retim Sanayi ve Ticaret A.S.) under SAN-TEZ project number 00028.STZ.2007-1. It is aimed to make innovative design changes and developments on the Mü
san VSM 060 type vacuum sweeper. To achieve this aim, alternative configuration designs are prepared by using commercial 3D modeling program, Catia&trade
V5. Basic vehicle structure is constructed. New Mü
san VSM 060 will be a fully electrically driven vehicle. All subsystems will be activated by using electrical motors whose power is supplied by batteries. All subsystems are mounted on the chassis which is a welded frame structure made up of 60x40x2 St37-2 grade steel tubes. Finite element analysis (FEA) of the chassis is performed by using commercial structural finite element analysis tools MSC Patran pre and post processor and MSC Nastran solver. Moment calculations are done for structural parts. Cleaning system of the new VSM 060 vehicle is decided to be a combination of mechanical and vacuum cleaning systems. An elevator system will be integrated in addition to vacuum system to pick up coarse particles. The vacuum system will mainly be utilized for very small size particle collection. Computational fluid dynamics (CFD) analyses are done by Punto Mü
hendislik Ltd. Sti. for the whole cleaning system components by using CFdesign, an upfront CFD analysis tool.
19
Honzíková, Drahomíra. "Zhodnocení nákladů životního cyklu u vybraného produktu." Master's thesis, Vysoká škola ekonomická v Praze, 2010. http://www.nusl.cz/ntk/nusl-76020.
Full textAbstract:
The goal of Master's Thesis is an identification of life cycle costs of vacuum cleaners. Next point is an analysis of these life cycle cost by using value analysis. The theoretical part is focused on definitions of Life Cycle Costing (LCC) and Value Analysis (VA). The practical part, which is fundamental, contains identification of life cycle cost of selected vacuum cleaners, life cycle costing of selected vacuum cleaners and their value analysis. Result of this Master's Thesis is an interpretation of the results and the suggestion of steps for consumers and producers of vacuum cleaners.
20
Vinberg, Morteza. "Compact, tuned silencer for vacuum cleaners." Thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-177301.
Full textAbstract:
Vacuum cleaner motors work at a relatively high rpm, which produces blade passing tones at high frequencies. In this report a honeycomb-liner type silencer for vacuum cleaners has been investigated. The main purpose of the silencer is to attenuate the first order blade passing tone, at approximately 7066 Hz. No modifications have been done to the motor. With insertion loss (IL) an average attenuation of between 3-8 dB was achieved. To confirm the results sound power measurements were done, but the IL-measurement results could not be verified by them. The report includes an analytical (COMSOL Multiphysics) as well as an experimental investigation. This thesis has been done in cooperation with KTH (Marcus Wallenberg laboratory for sound and vibration research), Müller-BBM Scandinavia and Electrolux Small Appliances.
21
Navarro, Heredia Sofia. "Exploration Strategies for Robotic Vacuum Cleaners." Thesis, KTH, Mekatronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246115.
Full textAbstract:
In this thesis, an exploration mode for the PUREi9 robotic vacuum cleaner is implemented. This exploration would provide information for optimizing the cleaning path beforehand, and would allow the robot to relocalize itself or the charger more easily in case it gets lost. Two elements are needed in order to implement an exploration mode; first, an exploration algo-rithm which will decide the next position of the robot in order to obtain useful information about the environment (unknown areas, empty spaces, obstacles...), and second, an exploration map which stores that information and is updated each time a new relevant position is reached. These elements are related and generally both are required for performing successfully the exploration of a specific environment. A frontier-based strategy is adopted for the exploration algorithm, together with occupancy grid maps. This strategy has long been regarded as a key method for autonomous robots working in unknown or changing environments. The idea of frontier-based algorithms is to divide the environ-ment into cells of regular size and drive the robot to the frontiers between cells with no obstacles and cells for which no information has been gathered. It plans one step ahead by choosing a lo-cation which provides new environment information, instead of planning in advance all locations where the robot needs to acquire new sensor information. Based on frontier strategy, two different exploration algorithms are implemented in the project. The first one is called "random frontier strategy", which chooses arbitrarily the frontier to go among the frontiers set. The second is called "closest frontier strategy", which chooses the closest frontier as the NBV (Next Best View) the robot should drive to. A path planning algorithm, based on Dijkstra’s algorithm and a node graph, has also been implemented in order to guide the robot towards the frontiers. The two methods have been compared by means of simulations in different environments. In addition, both exploration strategies have been tested on a real device. It is found that the closest frontier strategy is more efficient in terms of path length between scanning points, while both methods give a similar exploration ratio, or percentage of fully explored cells within the final map. Some additional work is required in order to improve the performance of the exploration method in the future, such as detecting unreachable frontiers, implementing a more robust path planning algorithm, or filtering the laser measurements more extensively.I den här rapporten har vi implementerat en utforskningsmod för robotdammsugaren Pure i9. Sådan utforskning skulle ge underlag för att optimera städmönstret i förhand och låta roboten relokalisera sig själv eller laddaren om den tappar bort sig. För att implementera utforskning behövs två saker. För det första krävs en algoritm för utforsk-ning, som bestämmer nästa position för roboten, med målet att samla användbar information om omgivningen (okända eller fria områden, hinder etc.) För det andra krävs en karta som lagrar informationen och uppdateras varje gång roboten når en relevant ny position. Dessa två hänger ihop och i allmänhet krävs båda för att framgångsrikt utforska ett specifikt område. Vi har valt en front-baserad strategi för utforskningsalgoritmen, tillsammans med en rutnäts-karta med sannolikheten för hinder. Denna strategi har länge betraktats som en nyckelmetod för autonoma robotar som arbetar i okända eller föränderliga miljöer. Idén med front-baserade strate-gier är att köra roboten till fronterna mellan celler utan hinder och celler där information saknas. Den planerar ett steg framåt genom att välja en plats som ger ny information om miljön, istället för att i förväg planera alla platser där roboten behöver samla in ny sensorinformation. Baserat på front-strategi, har vi implementerat två utforskningsalgoritmer i projektet. Den första är en slumpmässig strategi, som godtyckligt väljer en front att åka till, ur hela mängden av fronter. Den andra är en närmaste fronten-strategi som väljer den närmaste fronten som den nästa bästa utsiktspunkt som roboten ska åka till. Vi har också implementerat en algoritm för banplanering, baserad på Dijkstras algoritm och en nod-graf, för att styra roboten mot fronterna. Vi har jämfört de två metoderna genom simulering i olika miljöer. Dessutom har båda utforsk-ningsstrategierna testats på en riktig enhet. Närmaste fronten-strategin är effektivare med avse-ende på banlängd mellan skanningspunkter, medan båda metoderna ger liknande utforsknings-grad, eller samma procentandel av fullt utforskade celler inom den slutliga kartan.
22
Sedlmajerová, Jana. "Vybavenost československých domácností domácími spotřebiči v šedesátých letech 20. století." Master's thesis, Vysoká škola ekonomická v Praze, 2011. http://www.nusl.cz/ntk/nusl-161859.
Full textAbstract:
My dissertation deals with the progress of consumer society in the 60th of 20th century in the Czechoslovakia. At the beginning of my work i try to theory of consumer society, everydayness and the free time in czechoslovak society. My aim is equipment of electric apparatus in the families and their importance for women's work in households. Especially I reply the questions, where and how the apparatus were sold, how was the quality of them and how much apparatus saved women's jobs. I analyse the availability of those apparatus for consumers/users. I compare amount, prices and design of home appliances in Czechoslovakia and abroad. My dissertation is based on the fact that in 60th of 20th century was very big increase of refrigerators, automatic washing machines, irons, hoovers, hairdryers, televisions and next smaller home appliances. I compare this growth with countries of Western Europe. My dissertation is based on studium of specialized monographs, articles and studies of czech and english provenance. But I also use the unpublished sources of institucional and personal characters (Archive of the National Technical Museum, the National Museum Archive
23
Sagoo, Hardial S. "Reduction of noise levels in vaccum cleaners." Thesis, Aston University, 1988. http://publications.aston.ac.uk/15145/.
Full textAbstract:
The work described in this thesis is directed towards the reduction of noise levels in the Hoover Turbopower upright vacuum cleaner. The experimental work embodies a study of such factors as the application of noise source identification techniques, investigation of the noise generating principles for each major source and evaluation of the noise reducing treatments. It was found that the design of the vacuum cleaner had not been optimised from the standpoint of noise emission. Important factors such as noise `windows', isolation of vibration at the source, panel rattle, resonances and critical speeds had not been considered. Therefore, a number of experimentally validated treatments are proposed. Their noise reduction benefit together with material and tooling costs are presented. The solutions to the noise problems were evaluated on a standard Turbopower and the sound power level of the cleaner was reduced from 87.5 dB(A) to 80.4 db(A) at a cost of 93.6 pence per cleaner. The designers' lack of experience in noise reduction was identified as one of the factors for the low priority given to noise during design of the cleaner. Consequently, the fundamentals of acoustics, principles of noise prediction and absorption and guidelines for good acoustical design were collated into a Handbook and circulated at Hoover plc. Mechanical variations during production of the motor and the cleaner were found to be important. These caused a vast spread in the noise levels of the cleaners. Subsequently, the manufacturing processes were briefly studied to identify their source and recommendations for improvement are made. Noise of a product is quality related and a high level of noise is considered to be a bad feature. This project suggested that the noise level be used constructively both as a test on the production line to identify cleaners above a certain noise level and also to promote the product by `designing' the characteristics of the sound so that the appliance is pleasant to the user. This project showed that good noise control principles should be implemented early in the design stage. As yet there are no mandatory noise limits or noise-labelling requirements for household appliances. However, the literature suggests that noise-labelling is likely in the near future and the requirement will be to display the A-weighted sound power level. However, the `noys' scale of perceived noisiness was found more appropriate to the rating of appliance noise both as it is linear and therefore, a sound level that seems twice as loud is twice the value in noys and also takes into consideration the presence of pure tones, which even in the absence of a high noise level can lead to annoyance.
24
Andersson, Tomas, and Noa Spele. "Improving path planning of autonomous vacuum cleaners using obstacle classification." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229471.
Full textAbstract:
To effectively plan their movement, robotic vacuum cleaners require information about their surrounding environment. This thesis presents a mapping algorithm which uses collision input from a moving robot to create a grid map of the environment. The algorithm also classifies each obstacle cell in the grid map as either mobile or immobile. Methods for creating maps of unknown environments already exist. However, they often rely on information from expensive sensory equipment, and the maps do not include information about the mobility of the objects in the map. Hence, the aim of this thesis was to investigate if the map could be created using only limited information from more accessible sensors. A testing environment was created using the Unity 3D game engine, in which the robot was represented by a circular object. The robot had access to perfect information about its current position in relation to its starting position, the direction in which it was heading and any incoming collisions. Three test scenes were created in the simulation environment, representing different common operating spaces for a robotic vacuum cleaner. The scenes contained different kinds of mobile and immobile obstacles that the robot collided with. A series of tests were then conducted in the test scenes. The tests examined the performance of the created algorithm. The results indicated that the algorithm can create a grid map representation of an unknown environment and classify objects within it with an average correctness of around 80%. However, it is hard to say whether the algorithm would be effective in a real situation, due to the inconsistent results and unrealistic assumptions.Autonoma robotdammsugare behöver information om den omgivande miljön för att kunna planera sin resväg på ett effektivt sätt. I den här rapporten presenteras en kartläggningsalgoritm som med hjälp av kollisions information skapar en rutnätskarta av den omgivande miljön. Algoritmen klassificerar även hindren i rutnätskartan som mobila eller immobila. Det existerar redan metoder för att kartlägga ökända miljöer. Dock använder många av dessa metoder information från mer avancerade och dyrare sensorer, och kartorna innehåller ingen information om mobiliteten hos hindren i miljön. Syftet med denna rapport är därför att undersöka huruvida en sådan karta skulle kunna skapas med hjälp av mer tillgängliga och enklare sensorer. En testmiljö skapades med hjälp av spelmotorn Unity 3D, och i denna miljö representerades roboten av ett cirkulärt objekt. Roboten hade tillgång till felfri information rörande sin position i relation till sin startposition, riktningen i vilken roboten rörde sig i, och alla inkommande kollisioner. Tre stycken olika testrum skapades, vilka representerade olika vanliga miljöer i vilka autonoma robotdammsugare brukar användas. Rummen innehöll olika typer av mobila och immobila hinder, vilka roboten kolliderade med. En uppsättning av tester utfördes sedan i dessa testrum. Testerna undersökte den skapade algoritmens prestanda. Resultaten visade på att algoritmen kan skapa en rutnätskarta som representerar en okänd miljö, och klassificerar mobiliteten hos hindren med en genomsnittlig korrekthet på runt 80%. Dock är det svårt att avgöra huruvida algoritmen kan prestera lika bra i en verklig miljö, på grund av de inkonsekventa resultaten och de förmodligen orealistiska antagandena.
25
Sörme, Jacob, and Tobias Edwards. "A Comparison of Path Planning Algorithms for Robotic Vacuum Cleaners." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229771.
Full textAbstract:
Household robotics is on the rise with robotic vacuum cleaners taking the lead. One of the challenges in creating great robotic vacuum cleaners is path planning for coverage of the room. For instance, the robot might not know how the environment looks, or where in the room the robot is. Three path planning algorithms are tested: the random path algorithm, the snaking algorithm and the spiral algorithm. In our simulations the random algorithm was initially faster than the snaking algorithm. However, the random algorithm's performance worsened and it performed similar to the snaking algorithm in the end. The spiral algorithm performed worse than the other tested algorithms. The random algorithm showed a more stable performance than both the snaking and spiral algorithms. However, we believe that the spiral algorithm could be complemented with other algorithms. Errors in the results could possibly come from the method used in the software to detect wall collisions. Future research could improve the software and also cover collision with objects in rooms and rooms of other shapes. We concluded that the random algorithm performed best in our simulations and questioned the practical use of more advanced algorithms.Antalet robotar i hemmet ökar i världen och robotdammsugaren är ett populärt val. Bra ruttplaneringsalgoritmer är en av utmaningarna för att tillverka bra robotdammsugare. Exempelvis behöver inte roboten känna till sin position i ett rum eller ens känna till rummets utseende, hur ska utvecklare gå till väga? Tre ruttplaneringsalgoritmer har testats: en slumpartad algoritm, en sicksack-algoritm och en spiral-algoritm. I våra simuleringar fann vi att den slumpartade algoritmen var initialt snabbare än sicksack-algoritmen. Dock försämrades slumpalgoritmen över tid och till slut gav result likt de vi såg för sicksack-algoritmen. Spiral-algoritmen gav sämre resultat än de två övriga testade algoritmerna. Slumpalgoritmen hade mindre avvikelse än både spiral-algoritmen och sicksack-algoritmen. Vi tror att spiral-algoritmen skulle kunna kombineras med andra algoritmer för att ge bättre resultat. Fel i våra resultat kan bero på hur vi upptäcker väggkollisioner i simuleringarna. Framtida forskning kan förbättra och utveckla mjukvaran samt testa rum med varierande utseende. Sammanfattningsvis var slumpalgoritmen bäst i våra simuleringar och vi ifrågasätter den praktiska användbarheten hos andra mer avancerade algoritmer.
26
Gunning, Robin. "A performance comparison of coverage algorithms for simple robotic vacuum cleaners." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229676.
Full textAbstract:
Cheap automatic robotic vacuum cleaners keep their cost down by having less sensors and many of them focus on using a single frontal bumper sensor, this makes it important to be able to get good coverage of a room with no knowledge of said room. This paper investigates whether the algorithm boustrophedon is enough to get a good coverage of a simple room with a maximum of two furnitures and only 90 degree corners. A graphical simulation were made to test the algorithms that are commonly used in cheap automatic robotic vacuum cleaners to compare them with the result of only using boustrophedon. The results show that the best algorithms are the non-deterministic random walk and all combined. Boustrophedon tends to get stuck when the room is not empty and it only cleans half the room when starting in the middle of the room, while being the fastest and gets most coverage in an empty room when starting in a corner.Billiga automatiska dammsugare håller kostnaderna nere genom att minska antalet sensorer och många av dem använder endast en stötfångare med stötsensor framtill, vilket gör det viktigt att kunna få en bra täckning av ett rum utan vetskap om rummet. I denna rapport undersöks om algoritmen boustrophedon räcker för att få en bra täckning av ett enkelt rum med som mest två möbler och endast 90 graders hörn. En grafisk simulering gjordes för att testa de algoritmer som vanligtvis används i billiga automatiska dammsugare för att jämföra dem med resultatet av att endast använda boustrophedon. Resultaten visar att de bästa algoritmerna är den icke-deterministiska random walk och alla algoritmer kombinerade. Boustrophedon tenderar att fastna när rummet inte är tomt och den rengör bara hälften av rummet när man börjar i mitten av rummet, men den är snabbast och får mest täckning i ett tomt rum när man börjar i ett hörn.
27
Gylling, Andreas, and Emil Elmarsson. "Improving robotic vacuum cleaners : Minimising the time needed for complete dust removal." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-229393.
Full textAbstract:
The purpose of this study was to examine the cleaning efficiency of an autonomous vacuum cleaner robot; namely, reducing the cleaning time needed in an empty room. To do this we explored how the path planning could be improved upon given access to a dust map that would allow for more sophisticated algorithms depending on the state of the room. The approach we employed in order to compare different preprogrammed path patterns and our own greedy heuristic was to create a simulation environment in Unity3d. In this environment we could create a two dimensional plane to represent the length and width of a room with the size of our choosing. This plane was then subdivided into squared cells that would discretise the environment, which represented the dust map of the room. The tests were conducted in rooms with different dimensions in order to examine how different strategies' efficiency developed in relation to each other. Employing an algorithm like our greedy heuristic after an initial zigzag sweep resulted in a significant improvement in comparison to a robot that is restricted to template patterns only. Future work could involve finding the optimised solution for our heuristic in order to make full use of the dust map and thereby achieve minimal cleaning time for the robot.Syftet med denna studie var att undersöka en självstyrande robotdammsugares städningseffektivitet och att minimera tiden som krävs för att städa ett tomt rum. Vi undersökte hur roboten kunde planera sina vägval bättre genom att få tillgång till en dammkarta, det vill säga ett rutnät som håller reda på dammfördelningen i ett rum. Denna dammkarta möjliggör för mer sofistikerade algoritmer som beror på statusen i rummet. Vi jämförde olika rörelsemönster som sicksack, spiralen och väggkramaren med en egendefinierad heuristik. Ett enkelt öppet rum simulerades i Unity3d, där vi testade de olika algoritmerna. Rummet bestod av ett tvådimensionellt plan som representerade längden och bredden av rummet som gick att justera till vårt tycke. Detta plan delades sedan upp i ett rutnät som representerar vår diskretiserade dammkarta för rummet. Testerna utfördes i rum av olika dimensioner för att se hur de olika städstrategiernas effektivitet utvecklades i relation till varandra. Att använda sig av en algoritm så som vår heuristik efter ett första svep med ett sicksackmönster resulterade i en signifikant förbättring jämfört med en robot som är bunden till fördefinierade rörelsemönster. Framtida studier skulle kunna försöka hitta den optimala lösningen till vår heuristik, så att dammkartan kan utnyttjas till fullo, och därmed uppnå minimal städningstid för roboten.
28
Matějů, Jan. "Řídicí jednotka pro robotický vysavač." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219701.
Full textAbstract:
This paper is in introduction focused on review of robotic vacuum cleaning and evaluation of available products qualities. However the main focus of this paper is system design of all subsystems, control systems and PCD design of robot electronics. In this paper is also described a method for evaluating approximate distance of robot from the obstacle. There are also described problems of system design of IR proximity sensors. The last part of this work is development of control software for robot and its testing.
29
Ozkan, Tulay. "Visually-impaired Users And Product Interaction: A Study On The Interfaces Of Washing Machines, Vacuum Cleaners And Irons." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12608492/index.pdf.
Full textAbstract:
The appearance of the electrical appliances has undergone a dramatic change in many aspects since the 1920&rsquos. Throughout years, along with their changed appearance, the way the appliances are perceived has altered. The interface of domestic products is mainly dominated by visual elements. Undoubtedly, the domination of the visual perception in the interfaces of the appliances might cause complications in the interaction between the product and visually impaired users. In this thesis, the interaction between the electrical household appliances and visually impaired user is examined to identify the strong points in the interaction as well as any complications that may occur during the interaction. Observations were conducted with ten users to explore the interaction between the visually impaired users and three electrical domestic appliances: washing machine, vacuum cleaner and iron. The findings of the observations indicate that visually impaired users can operate their appliances, with some limitations. Yet a number of common problematic points related to the interface elements, which hinder from using their electrical appliances with full functionality, were encountered. At the end of the study, a list of design recommendations, some of which offered in the literature previously, are suggested.
30
Struller, Carolin Franziska. "Next generation vacuum deposited ALOx clear barrier coatings for flexible food packaging materials." Thesis, Manchester Metropolitan University, 2013. http://e-space.mmu.ac.uk/336476/.
Full textAbstract:
In the field of packaging, barrier layers are functional films, which can be applied to polymeric substrates with the objective of enhancing their end-use properties. In the case of food packaging applications, the packaging material is required to preserve packaged foodstuffs and protect them from a variety of environmental influences. Amongst others, the impermeability of the packaging material to substances including water vapour, oxygen and aromas is an important requirement for successful food packaging. Polymer films, vacuum coated with thin transparent barrier layers of aluminium oxide or silicon oxide, are very attractive candidates for food packaging applications due to the oxide film imparting attractive properties, including good barrier performance, transparency, microwaveability and recyclability. In this project, aluminium oxide barrier layers were deposited onto various commodity grade BOPP films via reactive evaporation of aluminium, using a modified industrial ‘boat-type’ roll-to-roll metalliser. Optimisation of the deposited coating, in some cases together with potential surface modifications of the BOPP films, was the main focus of the work. The effects of different film treatments (in-line and off-line); surface properties of the polymer film, such as topography and chemistry; coating stoichiometry and thickness; as well as conversion processes; on barrier properties were investigated using a broad variety of analytical techniques. Furthermore, critical parameters for the convertibility of vacuum coated films, including coating adhesion and coating surface energy, were assessed. This project has demonstrated that the barrier performance of aluminium oxide coated BOPP is heavily dependent on the plain film surface and the growth/nucleation conditions of the deposited film, both of which can vary to a large extent on standard packaging grade BOPP film. Whilst acceptable oxygen barrier levels were achieved on some of the standard BOPP film types, others did not match the requirements, despite investigating a wide range of coating parameters. This was found to be due to the presence of defects (permeation pathways) in the coating, which were reproduced from defects in the underlying polymer film surface. With regards to the barrier performance after aluminium oxide coating, the polymer film surface chemistry was identified as an important parameter. Furthermore, oxygen barrier performance was significantly enhanced when a high surface energy polymer skin layer was co-extruded onto the BOPP film. Nevertheless, water vapour barrier improvement for aluminium oxide coated BOPP films was only achieved through the use of different polymer skin layers or via depositing coatings with reduced oxygen content, thus obtaining grey coatings that can no longer be classified as transparent. Peel tests indicated very high levels of adhesion of the aluminium oxide coating to the BOPP film, with cohesive failure taking place within the polymer, rather than adhesive failure at the coating-substrate interface. Examination of the time related change of surface energy revealed a distinct decay with ageing time, most probably due to transfer of polymeric material and film additives from the reverse side of the film onto the coating and also migration through defects in the coating. Finally, the application of acrylate under- and topcoats, as well as adhesive lamination, was found to have the capability to significantly enhance the barrier performance of the aluminium oxide coated BOPP film. In the case of acrylate undercoats, this was attributed to the change in surface chemistry, whilst for topcoats and lamination processes, the barrier properties of the acrylate/adhesive play an important role, together with a possible ‘pore filling’ effect.
31
Vinci, Andréa. "Etude et développement d'une méthode de recherche pour les sources de contamination chimique des pompes à vide entre les équipements de EUV." Thesis, Grenoble, 2013. http://www.theses.fr/2013GRENT045/document.
Full textAbstract:
Ce travail présente l’étude d'une méthode de recherche utilisable en milieu industriel dessources de contamination chimique des pompes à vide équipant les lithographes EUV. Cetravail porte sur la problématique d’une éventuelle contamination carbonée introduite par lesystème de pompage et, notamment, par la turbine et le stator.A partir d’une caractérisation détaillée par chromatographie et spectroscopie dephotoémission de la contamination résiduelle issue du procédé de production, une procédured’analyse par spectrométrie de masse en phase gazeuse (RGA) utilisable en milieu industriel aété mise en oeuvre. En particulier, la possibilité de varier la température de l’échantillonpendant la mesure permet de caractériser la contamination carbonée résiduelle en étudiant lesprocédés physico-chimiques qui en sont à l’origine.Après avoir démontré l’efficacité du nettoyage final à éliminer les résidus des huiles de coupet avoir identifié la contamination organique résiduelle comme résidu du seul procédé denettoyage industriel, une copie « in vitro » de ce nettoyage a été développée : cela a permis demieux le caractériser en étudiant l’impact de plusieurs paramètres.L’influence de la concentration de lessive et de la procédure de séchage sur la contaminationcarbonée résiduelle a ainsi été étudiée. Une analyse de la contamination en phase gazeuse(RGA et TD-GCMS) ainsi qu’une caractérisation XPS de la surface des échantillons ont étéfaites. L’analyse de l’ensemble de ces résultats a permis d’établir un lien direct entre laconcentration de lessive utilisée et la contamination organique résiduelle. De plus,l’importance d’un séchage à haute température a été démontrée en mettant en évidence laprésence de plusieurs facteurs qui contribuent à la contamination résiduelleThis work presents the study of a research method of the contamination sources of EUVLturbo molecular pumps, suitable for the industrial environment. This study deals with theproblem of a possible carbon contamination due to the pumping system and in particular tothe rotor and the stator.After a detailed characterisation of the production process residual contamination by TDGCMS/FID and XPS, a RGA procedure suitable for industrial environment has beendeveloped. The possibility to change the sample temperature during the measure lets tocharacterise the residual carbon contamination by investigating its primal physic-chemicalphenomena.The identification of the whole production process residual contamination demonstrates theefficacy of the industrial cleaning step to clean lubricants residuals. In order to bettercharacterise the cleaning step residual contamination, we developed an “in vitro” copy of theindustrial cleaning step.Thanks to the temperature variable RGA analysis of the residual contamination, we couldpoint out several contributions to carbon contamination and we could connect thesecontributions to different cleaning parameters.Detergent concentration as well as different drying procedure impact on residual carboncontamination has been studied. RGA and TD-GCMS/FID analysis as well as XPS surfacecharacterization have been performed. These analyses show a direct connection between thedetergent concentration used in the cleaning step and the residual carbon contamination.Furthermore, the importance of a high temperature drying step has been demonstrated
32
Bruyère, Michel Jean. "An ultrahigh vacuum system for the scattering of keV ions by a clean silicon(100) surface." Thesis, University of Ottawa (Canada), 1990. http://hdl.handle.net/10393/5952.
Full textAbstract:
An ultrahigh vacuum surface physics system was designed and built to study ion-surface interactions at various incident angles by detection of the forward scattered particles. The proposed initial measurement is the scattering of keV ions by a clean Si(100) surface.
33
Kuparowitz, Tomáš. "Použití mobilního robotu v inteligentním domě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220068.
Full textAbstract:
Aim of this thesis is to search the market for suitable autonomous robot to be used by smart house. The research in this work is partly done on the range of abilities of smart houses in matter of sensor systems, ability of data processing and their use by mobile robots. The output of this thesis is robotics application written using Microsoft Robotics Developer Studio (C#) and simulated using Visual Simulation Environment. Main feature of this robotic application is the interface between robot and smart house, and robot and user. This interface enables employer to directly control robot's movement or to use automated pathfinding. The robot is able to navigate in dynamic environment and to register, interact and eventually forget temporary obstacles.
34
Lin, Tien-Chih 1966. "Interactions of Clean and Sulfur-modified Reactive Metal Surfaces with Aqueous Vapor and Liquid Environments : A Combined Ultra-high Vacuum/electrochemistry Study." Thesis, University of North Texas, 1998. https://digital.library.unt.edu/ark:/67531/metadc278914/.
Full textAbstract:
The focus of this research is to explore the molecular-level interactions between reactive metal surfaces and aqueous environments by combined ultra-high vacuum/electrochemistry (UHV-EC) methodology. The objectives of this work are to understand (1) the effects of sulfate ions on the passivity of metal oxide/hydroxide surface layer, (2) the effects of sulfur-modification on the evolution of metal oxide/hydroxide surface layer, and (3) the effects of sulfur adsorbate on cation adsorption at metal surfaces.
35
Riyahimalayeri, Kamrooz. "Slag, Steel, Ladle and Non-metallic Inclusions Equilibria in an ASEA-SKF Ladle Furnace." Doctoral thesis, KTH, Termodynamisk modellering, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102149.
Full textAbstract:
This study explores the possibility of prediction and modification of some of the physicochemical properties of non-metallic inclusions by considering top slag-steel-ladle equilibria in an ASEA-SKF ladle furnace. To test the reliability of an available computational thermodynamic computer program, the first sub project was done. It was concluded that LiMeS, an interface for Thermo-Calc, is a useful tool for slag-steel equilibrium calculations. The second sub project was set out to find some model/s that could calculate the most accurate oxygen activity of molten steel compared to the measured one. This study concluded that both Wagner’s and Turkdogan's equations are useful. It was further seen that increasing the Al contents in the molten steel, increasing the CaO/Al2O3 ratio in the top slag, and reducing the temperature, resulted in reduction of the oxygen activity of the molten steel. In the third sub project a comparison was made between measured CaO and Al2O3 (normalised to CaO-Al2O3) in top slag, calcium aluminate inclusions, and the results of theoretical calculations. The average contents of CaO and Al2O3 in all inclusions were close to the composition of the phase Ca12Al14O33 and the contents of CaO and Al2O3 in the slags were close to the composition of the phase Ca3Al2O6 in the binary phase diagram of CaO-Al2O3. The forth sub project set out to study the effect of vacuum degassing time on non-metallic inclusions. It was concluded that during the vacuum degassing process the share of calcium aluminates compared to spinels, Ca content of the oxides, and the average equivalent circle diameters of the oxides were increasing, and oxides tended to form spherical shapes. Finally, based on the preceding four sub projects, the fifth sub project aimed to optimize the steel treatment in an ASEA-SKF ladle furnace. The final results showed that by adding 200 kg fluorite to the top slag of 1200 kg, it was possible to achieve a sulphur content of less than 10 ppm in the steel and a sulphur ratio between slag and steel of 1570, and at the same time reduce the oxygen activity of the molten steel and the degassing time.QC 20120917
36
Langmo, Jotham. "Verifiering av speciell tvättutrustning med avseende på renhetsgrad." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104671.
Full textAbstract:
Inom medicin och kärnkraft ställs höga krav på olika komponenters renhetsgrad. Vid tillverkning av precisionskomponenter inom medicin och kärnkraftsteknik så används skärvätska för att kyla och smörja godset. Skärvätskan behöver tvättas bort innan komponenterna skickas till kunderna. För att kunna tvätta bort skärvätskan används en speciell tvättutrustning. Idag saknas en metod för att kunna påvisa att den speciella tvättutrustningen på ett tillförlitligt sätt uppnår gällande krav och standarder på renhet som ställs av branscherna, på komponenterna. Genom att verifiera tvättutrustningen mot en specifik kravbild, godkänns tvättutrustningens duglighet och således frisläpps utrustningen för produktion. Målet med studien är att ta fram ett underlag för att kunna verifiera en speciell tvättutrustning. Målet uppnås genom att undersöka vilka faktorer som påverkar renhetsgraden i tvättprocessen och utveckla metoder för att säkerställa att dessa faktorer beaktas. Några av metoderna som används i arbetet är Plan-Do-Study-Act (PDSA), Acceptanskontroll enligt attributsmetoden, intervju och observation. Resultatet av provgruppsmätningarna från laboratoriet, visar att komponenternas renhetsgrad ligger inom Willos kravställning på restkontamination av olja≤10 μg/cm^2 då komponenterna tvättats med tvättprogram två. Efter att provgupperna genomgått acceptanskontrollen står det klart att provgrupperna accepteras med en sannolikhet på 95,6% och att tvättprocessen är stabil. I studien har gamla och antagna mätvärdena använts eftersom det tar lång tid att ta laboratorieprover och tiden som examensarbetet pågår är begränsad. Med de gamla och antagna mätvärdena skulle den speciella tvättutrustningen kunna verifieras mot Willos kravställning, för att möta branschernas krav på renhetsgrad. Genom verifieringen kan man på så vis påvisa att tvättutrustningen levererar stabilt tvättresultat över tid.In medical and nuclear power applications, high demands are placed on the level of cleanliness of various components. When precision components in medicine and nuclear power technology are manufactured, cutting fluid is used to cool and lubricate the raw stock. The cutting fluid needs to be washed away before the components are sent to customers. To be able to wash away the cutting fluid, special washing equipment is used. Today, there is no method to demonstrate that the special washing equipment reliably meets current requirements and standards for cleanliness set by the industries on the components. By verifying the washing equipment against specific requirements, the capability of the washing equipment is approved, and thus, the equipment is released for production. The study aims to produce a basis for verifying special washing equipment. The goal is achieved by examining which factors affect the level of cleanliness in the washing process and developing methods to ensure that these factors are taken into account. Some of the methods used in work are Plan-Do-Study-Act (PDSA), Acceptance sampling according to the attribute method, interview and observation. The results of the test group measurements from the laboratory show that the level of cleanliness on the components is within Willo's requirements for residual contamination of oil≤10 μg/cm^2 when the components have been washed with washing program two. After the sample groups have undergone the acceptance sampling, it is clear that the sample groups are accepted with a probability of 95.6% and that the washing process is stable. In the study, old and assumed measurement values have been used because of the time it takes to perform laboratory samples, and the time that the degree project progresses is limited. With the old and assumed measurement values, the special washing equipment could be verified to Willo's requirements in order to meet the industries' requirements for the level of cleanliness. Through the verification, it can be demonstrated that the washing equipment delivers stable washing results over time.
37
Lee, Chien-Ming, and 李乾銘. "Heat Transfer Analysis in Clean Room with Automatic Vacuum Cleaner." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/89252756164160971394.
Full textAbstract:
碩士國立高雄應用科技大學
模具工程系
98
Clean room had been widely used in various high tech industries. In the past two decades. So many researches had been carried out to study the flow field of different types of clean room. Because the production technology is developing continuously, the quality of production and precision is demanded rigor and rigor. Therefore, controlling the cleanliness is very important during the process of production. In order to make a better production environment, the clean room must be developed and set all kinds of standards . This research's goal is the discussion automatic vacuum cleaner the heat transfer effect and the temperature field distribution under the different heat transfer condition in Clean Room. This research carries on the simulation using CFDesign, the condition for the supposition in a constant temperature environment, simulation analysis automatic vacuum cleaner heat transfer phenomenon under the different FFU rotational speed and vacuum cleaner position. The result showed that the FFU rotational speed is higher, its heat-removal effect is better, will not affect the temperature all around the automatic vacuum cleaner. In addition the different vacuum cleaner position will have the different temperature field distribution regarding the system interior, will be also limited regarding the environmental effect. Keywords: heat transfer、Clean Room、CFDesign、FFU
38
Chou, Yu-An, and 周育安. "Filtration Efficiency Study of Industrial Effective Vacuum Cleaner." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/24142241214264544229.
Full textAbstract:
碩士國立交通大學
環境工程系所
98
In the present study, an efficient industrial vacuum cleaner and a general industrial vacuum cleaner were used to investigate the filtration efficiency of nanoparticles. The test results showed that in three filtration elements of the efficient vacuum cleaner: filtration paper bag, filter cloth, and HEPA cartridge, nanoparticles were mainly collected by the final HEPA cartridge. In addition, the emitted particles of the vacuum motor were found to mainly consist of metal, carbon, and soluble ions, and nanoparticles were found to be generated by the evaporation of lubrication oil. The final HEPA cartridge solved the motor emission problem in which most of the emitted nanoparticles were below 100 nm in diameter and peaked at about 10 nm. In comparison, the general industrial vacuum cleaner has only two filtration elements: filter cloth and filter cartridge, and the emitted particle number concentration of its motor was found to be about 19 times higher than the efficient vacuum cleaner. In addition, test results showed that the general vacuum cleaner had a low collection efficiency for nanoparticles. In this study, a filter cartridge made of high efficiency fibrous filter was fabricated to install behind the exhaust port of the general industrial vacuum cleaner. Test results showed that the filtration efficiency of nanoparticles was increased to greater than 83% and high concentration nanoparticles emitted by the motor could be removed efficiently.
39
Chen, Jian-Ren, and 陳建仁. "Study of Active Noise Control for Vacuum Cleaner." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/auskc8.
Full textAbstract:
碩士中原大學
電機工程研究所
102
The theory of vacuum cleaner noise cancellation is based on Active Noise Control (ANC). The anti-noise wave of a vacuum cleaner generated by secondary source can cancel vacuum cleaner noise. Passive Noise Control (PNC) is typically used for vacuum noise cancellation in soundproof structural designs and in sound-absorbing materials, both of that have a certain effect. This study presents analysis of feedforward and hybrid ANC systems with acoustic feedback neutralization algorithm. In order to find the best length and improve the ability of noise reduction, analysis of the causality and the sampling rate were conducted. We also analyzed the multiple-channel ANC system. Finally we constructed the best length and suitable size of the device that reaches the attenuation of 6-12 dB. In order to have more suitable device for home application, narrowing the device is suggested as future research.
40
Tsai, Sheng Yu, and 蔡勝宇. "Development of FPGA Autonomous Navigation Controller of Vacuum Cleaner." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/22708243686583795659.
Full textAbstract:
碩士長庚大學
機械工程研究所
98
Robotic cleaners are market-proven service robots. The most chal-lenging issue of producing a robotic cleaner is to maximize the coverage performance while the cost of robotic cleaner is in a minimum level. Due to the autonomous navigation requirements of robotic cleaners, their control systems are quite complex and coupled. In this paper, we propose a modular based robotic cleaner control system using field programmable gate array (FPGA). The proposed control system is composed of the modules of sensor data collection, closed loop motor control, featured map construction, navigation path library construction, navigation spot allocation, and path control. These modules are constructed individually, and finally integrated to perform autonomous navigations with complete coverage. The finite state machine (FSM) is used to dynamically control the path of cleaning according to the sensor data and elapsed time of each navigation mode. On the other hand, a set of pressure sensor module with four pneumatic chambers is used to detect for us applied on walls and obstacles around the cleaner so that the performances of map construction and complete coverage can be improved. Finally, several experimental results are evaluated based on the path of navigation and the percentage of coverage with elapsed time to verify our approaches.
41
Sanftl, Thomas, and 湯莫時. "Disruptive Innovation Applied to the Robot Vacuum Cleaner Industry." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/48ttes.
Full textAbstract:
碩士輔仁大學
國際創業與經營管理學程碩士在職專班
103
This thesis is based on Christensen’s 1997 published book, “The Innovator’s Dilemma” and it illustrates how to qualify a disruptive innovation. It also will examine new qualification criteria proposed by Paul Paetz (2014), author of the book “Disruption by Design”. The new qualification criteria includes criteria such as “the understanding of the “Job to be done” of a product. This means, that there must be a scarcity in the market, otherwise the innovation does not qualify as disruptive. In addition to this, Paetz (2014) throws in the criteria of a “newmarket disruption” to the “low-end disruption” theory of Christensen (1997). Towards the end, this thesis demonstrates in detail why company X has not the potential to disrupt the robot cleaner vacuum market nor the canister cleaner vacuum market according to Christensen’s (1997) necessary requirements to be a disruptive innovation.
42
Cheng, Chien-Sheng, and 程建升. "Sound Quality Analysis and Improvement Countermeasure of Vacuum Cleaner." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/44661466162524378414.
Full textAbstract:
碩士國立臺灣海洋大學
系統工程暨造船學系
96
Although vacuum cleaner can benefit people's cleaning, but it produce very loud noise and very ear-piercing while operating. That will let people feel discomfort of psychological or physiological. To improve ways from sound pressure, sound quality and radiation of vibration. In noise, the analysis of the noise source first is in order to find out about the spectrum and source of the noise. It is measured the sound quality parameter of examining vacuum cleaner with the artificial ear, and find that main problem at loudness and sharpness too much. To do the vibration examine separately on the surface and motor of the dust catcher in order to understands the spectral characteristic of vibration of the structure, and compares with noise frequency spectrum to determine composition in structure of sound. After comparing with noise and vibration’s frequency spectrum ,it is determined main source of noise that motor operation produce to exhaust noise 70dB, vibration and electromagnetic noise 65dB. Using dB sonic sound quality software to do analysis to the dust catcher,. We takes Acoustic materials to reduce sharpness degree, and uses silencer , damping scene and sound insulation barrierr to reduce loudness degree. Sound pressure level is decrease by improving from 76.4dB(A) drop to 55.1 dB(A) ,and dropping total amount to 21.3dB (A) .The exhaust noise is dropped total amount to 14dB (A). Every parameter of sound quality parameter: loudness drop from 33.4sone to 10.3 sone, sharpness drop from 2.04acum to 1.67 acum, sound quality subjective agitated degree drop from 18.9 to 10.25.
43
Thang, Lang-Van, and 藍凡善. "Experiment and Evaluation of Active Noise Control for Central Vacuum Cleaner." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/q5a77d.
Full textAbstract:
碩士中原大學
機械工程研究所
98
By means of fast computation device associated with microphone and efficient control algorithm, active noise control (ANC) has been successfully applied to numerous systems such as fans, ventilation system, washing machine, automation, etc. The feasibility of ANC to reduce noise for Central Vacuum Cleaner (CVC) is investigated in this thesis. Several fundamental problems of noise resources in CVC include, for example, high noise radiation, vibration of plastic housing during operation, quick decrease of pump sucking flow and pressure. The goal of this study is to find out the primary noise resources and set up the experiment and evaluate the system performance with a couple of control methods. Through experiment testing and evaluation, the primary noise resources are due to the running of motor and fan as well as the airflow in the duct. To deal with both the noise resources, several approaches are designed and tested for noise reduction. For example, a number of control speakers are implemented around the motor and fan, and a control speaker is implemented on the duct for airflow and for both noise resources. Assuming that the noise resources are consistently generated and no implementation of DSP device for on-line fast computation and control, an off-line experiment is carried out to verify the proposed methodologies. The real noise recorded from central vacuum cleaner uses as primary noise. A simple control method designed by inversing the noise signal and a more comprehensive control method by using the filtered-x least mean squares algorithm are applied to compute control signal radiated by the secondary loudspeaker. Furthermore, various implementations of control speaker are also studied. From the experiment results, the proposed design is verified with good performance of noise reduction. And it gives a significant index and trend of appropriate design of ANC system for noise reduction for central vacuum cleaner. Keys word: active noise control, central vacuum cleaner, airflow noise, motor noise, filter X least mean square.
44
Tran, Thai-Son, and 陳泰山. "A Study of Active Noise Control for Vacuum Cleaner Using FxLMS Algorithm." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/nn3ar4.
Full textAbstract:
碩士中原大學
機械工程研究所
98
The active noise control system based on adaptive filter theory is considered to use for noise reduction of Central Vacuum Cleaner (CVC). In this thesis, control structure corresponding to the practical setup and the associated control methods are investigated. A feedforward active noise control system is proposed employed with a reference sensor to measure the noise in the primary path and a single secondary path with a control source. The ANC control system is consisted with a primary path with the unknown plant measured by a microphone and a secondary path with control implementation radiated by a control speaker. Based upon such configuration, modeling of a discrete-time ANC control system is established. A basic principle of ANC to introduce a canceling “antinoise” signal with the same amplitude but the exact opposite phase so that resulting in an attenuated residual noise signal is used. The filtered-X LMS algorithm as a modification of the well-known Least-Mean Square (LMS) algorithm is further studied and proposed for noise reduction. Simulation results of both methods are presented. It indicates that the filtered-X LMS algorithm gains better performance.
45
Lin, Hsien-Kuo, and 林獻國. "Consumer purchase behavior of home vacuum cleaner - a study for consumers in northern Taiwan." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/47079668788616029969.
Full textAbstract:
碩士東吳大學
企業管理學系
98
Owing to the market demand is slowing down and import brand come into for competition, which makes local brand hard to make profit. Import brand comes with the high brand awareness and marketing experience, that makes local brand in hard time. This research focuses on consumers’ internal and external demand to survey a way of segment the types of consumers. With consideration of product’s tributes, look forwards to finding a suitable marketing method for suppliers and marketers. Analyze the questionnaire by SPSS software; dividing the result with 4 ways: Life style analysis, life style segmentation in population statistics, life style segmentation in evaluation and life style segmentation in consuming conditions. Discuss consumers’ purchase behavior and grouping, and describe consumers’ characteristics and behaviors to find our appropriate segmentation, then in order to market the group target. According to the result of research, the consumers are divided into three groups or targets. Every group has different population statistics, life style segmentation in evaluation and life style segmentation in consuming conditions. Also here marketing mixes are raised for further study or marketing direction.
46
Chi, Shin-Chin, and 紀世欽. "The Effect of Product Attributes on Purchasing Strategy—A Case Study of Vacuum Cleaner." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/99191984608469342073.
Full textAbstract:
碩士大同大學
工業設計學系(所)
100
The research investigates the comparison of the effect of product attributes on purchasing strategy of customers in order to be used as a design reference for vacuum cleaners in the future. The Study is carried out by using preliminary and formal questionnaires. The single t-analysis of the preliminary questionnaire indicates that the product attributes of 「vacuum effect」、「durability」、「comfortable feeling」、「user-friendly operation」、「dimensions」 and 「noise decibel」would significantly effect the customer buying behavior。The stepwise and backward analyses of the formal questionnaire realizes the remarkably positive influence of specific product attributes on different purchasing strategies and sales channels as following: 「compact dimension」 for wholesale stores；「automatic wiring」 and 「noise decibel」 for electronics exclusive stores；「noise decibel」 for web platforms； 「storage of soft and hard tubes」、「wheel durability」 and 「button durability」for low-price purchasing；「comfortable feeling of handgrip」 and 「compact dimensions」for basic functions only； 「low leakage of dust」for no extra expense ； 「button durability」、「handgrip with switch」 and 「low leakage of dust」for price comparison of different suppliers； 「display of dust cleanliness」 and 「wheel durability」for passive purchasing of household electronics；「low leakage of dust」、「motor lifetime」 and 「automatic wiring」 for purchasing at different locations；「wheel durability」 and 「display of dust cleanliness」 for free spare parts； 「dimensions of mainframe」 and 「handgrip with switch」 for purchasing products meeting needs；「display of dust cleanliness」、「wheel durability」 and 「handgrip with switch」 for return service。The study results are expected to be used as a reference for the design of vacuum cleaners in the future。
47
Wu, Yu-Chung, and 吳友眾. "Now and Future of the Robot Vacuum Cleaner Technology - An analysis from the Patent Database." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/m3j682.
Full textAbstract:
碩士國立臺灣科技大學
高階科研EMRD
107
The world's first robot vacuum cleaner (RVC) was the "Trilobite" designed by the Swedish Electrolux in 1996. Today, RVCs are entering a phase of rapid development. In 2018, the global market size of RVCs has exceeded 20 million units per year. In order to enhance the user experience, RVC has been developing towards "intelligence" and "functionalization", and the navigation function is the core of intelligence. In 2010, Neato introduced model XV-11, it was the first RVC with LiDAR (light dection and ranging). Compared to the early-staged random-collision products, robots with planning capabilities provides a better user experience. In 2017, Xiaomi introduced LiDAR RVC that was only half of competitors’ prices, it puts pressure to those existing manufacturers and makes the navigation function becoming a standard for RVCs. From the US patent database analysis, figure out the diagrams present the number of patents, patent classification disposition and important assignee. Meanwhile, refer to the methods proposed by CHI Research, Ernst and John R. Allison, through patent quantitative indicators to evaluate the technical capabilities of representative companies in the market. The indicators include number of patent applications, grant rate, number of citations, number of the files were cited, number of claims, time passed for review. These analysis results can further understand the current situation of the industry and the development trend of major companies. Then survey a number of meaningful patents, including 2005, 2013, 2017 for litigation initiated by iRobot, the patent litigation in 2017 pushed Taiwanese manufacturers make some actions like, MSI announced exiting the market, and MSI assigned 3 patents to iRobot. Matsutek and iRobot got reconciliation after ITRI assigned 6 patents to Matsutek. The research results show that the number of patents for RVCs is growing year by year, and 2 kinds of companies with different technical fields joined the market. One is from traditional vacuum cleaner manufacturers, some of them have decades of history of home appliance manufacturers, another is from robot design companies, they are good at navigation algorithms and communication technology. The main patent layouts of the two parties include three categories: indoor navigation, obstacle avoidance, and robot special structure design. From the statistics, the top four patent quantified indicators are iRobot, Samsung, Electrolux, and LG. Among them, iRobot, Samsung, and LG use visual navigation. On the other hand, LiDAR navigation owns less related patents, the algorithm can be obtained from open source code. Many newcomers prefer to choose the design of the LiDAR navigation.
48
Dai, Siao-ying, and 戴筱穎. "A Study of the Factors Affecting Product Values and Preferences–Using Vacuum Cleaner as an Example." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/21044259496026818086.
Full textAbstract:
碩士國立臺灣科技大學
設計研究所
100
In the age with advanced technologies, products have been evolving in a very fast speed. Even matured products have been improved continuously as manufacturing technologies develop. Many products in the market have similar functions. In other words, consumers have more choices when purchasing a product, leading to stronger competitions among brands. Currently, there are many vacuum machine brands in the market. For a vacuum machine product, it is very important to find a way to stand out among so many products from different brands with similar functions. If the external looks of the product can be out of the ordinary, the perceived value of the product can be increased. And if different visual designs can be integrated based on consumers’ preferences and requirements, there will be more chances to stimulate consumers’ desire to make purchases. This study was conducted in two phases. The first phase was a questionnaire survey to explore the relationships between (1) product list price and perceived value, (2) product list price and preference, and (3) perceived value and preference, and the interactions among them. Statistical tests were applied to analyze the rank differences using averages. The Pearson product-moment correlation coefficients between product perceived value and preference, design, color, and material were calculated. And MANOVA was conducted to further explore the differences in product perceived value, design, color, and material between males and females. The research results are summarized below: 1.Higher listed price of a product led to higher perceived value; lower listed price of a product led to lower perceived value. 2.Product perceived value was positively related to preference. 3.Perceived value and preference were influenced by product design, color, and material. And the influences of product design, color, and material on preference were larger than those on perceived value. 4.Both male and female subjects had the same product perceived value. However, their product preferences differed. The second phase was to find the subjects with rank differences between product perceived value and preference and list price based on the results of the questionnaire survey. And in-depth interviews were then conducted with these selected subjects, in order to find out the factors which influenced product perceived value and preference, as the reference for product design and development. The research results are summarized below: 1.Factors that may have led to increase of product perceived value and preference: Form: For design the following keywords shall be considered: succinct, neat, streamlined, designed, modern, unified, special, novel, ergonomic design, and female design. Color: For color the following keywords shall be considered: fashionable, sense of technology, luxury, smooth, comfortable, cold, and light. Material: For material the following keywords shall be considered: diversified and delicate surface finishing and combination of different materials. 2.Factors that may have led to decrease of product perceived value and preference: Form: For design the following keywords shall be avoided: simple without details, complex, cumbersome, too machine-like, conservative, and common. Color: For color the following keywords shall be avoided: old-fashioned and out-of-date, conservative and safe, heavy in general, not pure, and unbalanced color arrangement. Material: For material the following keywords shall be avoided: single material or single finishing, inharmonic combination of materials, and rough surface treatment. The results of this study can be used as references for designers to design products. A key to improve product perceived value and preference is to place more focuses on details. And it is important to avoid those design features which may lead to decease of perceived value and preference. These results are helpful to make products more attractive and more competitive in the market.
49
Lin, Hung-jui, and 林宏叡. "Patent search and patent analysis based on sample database－a case study of intelligent vacuum cleaner." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/65655006172175368394.
Full textAbstract:
碩士逢甲大學
工業工程與系統管理學研究所
99
With the fierce competition in the era of knowledge-driven economy, cheap manufacturing cost could no longer secure companies’ competitive advantages while it is more important to execute the patent analysis to assist manager and technical staffs realize the state of the art or patent portfolio of the competitor. One the one hand, analyzing patent information could assist the upgrade of technical ability. One the other hand, it can also help to minimize the risk of patent infringement. Only through efficient and effective patent search can we get the exact and immediate patent information for further development. The foundation of this study is to use the target patent that had already been indentified to pre-build the sample databases to perfect the current searching method and developing a new patent search process could make the whole process more efficient and effective. Meanwhile, in the case study of intelligent vacuum cleaner industry, we illustrate how to do patent search with the new process. Finally, we conclude the trend of technical development from the patent information that we identified to provide insight for business managers for possible business strategy development.
50
Yang, Wen-Chun, and 楊文焌. "A Research of Competitive Strategy of Electrical Appliance Industry－A Case Study of Vacuum Cleaner Market." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/76649114831286105551.
Full textAbstract:
碩士開南管理學院
企業管理研究所
93
After Taiwan’s entrance into WTO, the electrical appliances products from countries all over the world will enter Taiwan’s market one after another, this will cause great impact to most domestic electrical appliance manufacturers here in Taiwan because domestic market is what they are based on ,this is especially true for small electrical appliance industry, because most of the companies in this industry are small or medium size company, therefore, how to break the barriers and find new business opportunities thus become an important topic to Taiwan’s electrical appliance industry. This study aims at investigating the competitive strategies for vacuum cleaner industry, it is mainly based on the architecture of Porter’s five force analysis and value chain analysis, it performs in-depth study of the industry status and development trend of the case study company, it also uses game theory to study how the case study company adjusts its behavior to cope with the market structural change, in order to propose strategies for the case study company to enhance its competitiveness. To achieve the above goals, this study bases its analysis theoretical architecture on collecting competitive strategic theoretical model with investigations on literature. Furthermore, this study performs data collection and analysis through “case studies “, the collected data include: visits and the inner document and information from case study company. For the “in-depth visit” parts on the case study company, it comprises mainly of the top management personnel and business decision-makers inside the company, finally together with the valuable experiences and opinions from the senior managers in the related industries; the archived and related documents in the company are used as the study evidence in the document aspect. After obtaining the above information, the information are analyzed and summarized, we therefore obtain the following conclusions: 1. Through the use of game theory ,this study found that the case study company mainly uses two strategies such as : strategic alliance and brand proliferation .The motives behind the strategic alliance of the case study company are mainly on（1）Pursuing economic scale production, enhance the utilization of equipment and production capability（2）Obtain technology license of advanced vacuum cleaner manufacturing technologies in order to enhance quality（3）Enter the Japanese market effectively and in time .The brand proliferation strategy of the case study company can differentiate different markets, based on the demands from customers of different channels, and promote multiple brands strategy at different price intervals in order to attract customers of different purchasing motives, most importantly, it stops successfully other competitors from entering the market. 2. Through the value activity analysis, this study found that the case study company has its competitive advantage in the marketing channels; the marketing structure of the case study company is built up by its subsidiary, it not only provides a stable sales channel for the case study company, but also gains the market share for the case study company in the marketing channel battle.