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1
Borile, Federica. "On the Mediterranean conveyor belt system." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11163/.
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The Mediterranean Sea is a semi-enclosed sea, connected to the Atlantic Ocean through the Gibraltar Strait and subdivided in two different regions by the Sicily Strait. The geographical extension of the basin, the surface heat flux, and the water inflow from the Gibraltar Strait are some of the basic factors determining its horizontal and vertical circulation.
In the Mediterranean strong salinity and temperature zonal gradients contribute to maintain the zonal-vertical circulation, while meridional-vertical cells are equally forced by winds and deep water mass formation in three regions, the Gulf of Lyon, the southern Adriatic and the Cretan Sea areas.
The objective of this thesis is to study how these cells combine together to form the Mediterranean conveyor belt system. This has never been attempted before so the conclusions are necessarily preliminary.
In the first part we discuss the vertical zonal and meridional circulation by reconstructing the Wust Mediterranean vertical salinity and temperature structures in an attempt to evaluate the water mass structure consistent with modern data. Our results confirm that Wust depicted vertical circulation from scarce data is reproduced by the past 27 years observations.
The structure of both meridional and zonal circulations was discussed using velocity vertical streamfunctions with two different methods. The first one, eulerian, allowed us to observe vertical structures that were already reported in the literature. Recent studies in the Atlantic Ocean have shown that gyres and eddies have an important influence in the isopycnal vertical circulation.
This is called the residual circulation which was computed in this study for the first time.
A possible interpretation of horizontal connection between the meridional and zonal cells was discussed using horizontal streamfunction.
In the last part of the thesis we have been developing an idealized numerical model to study the vertical circulation in the Mediterranean.
2
Wright, M. J. "Design of a conveyor belt washer." Thesis, University of Canterbury. Mechanical Engineering, 2003. http://hdl.handle.net/10092/6629.
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The purpose of this project is to design a device to clean fish solids and plaque from plastic conveyor belts after they have been taken off fishing ships. This project involved a systematic design study along with an experimental investigation into the effectiveness of cleaning methods.
While fishing factory ships are at sea, the plastic conveyor belts that are used to transport fish become tainted with a biological plaque that some bacteria create to protect themselves, and fish residue. A brief was evolved that required the development of a land based cleaning device to reduce the non-productive cleaning time at sea.
A systematic design procedure was adopted for the design of the belt-cleaning device. Research showed that strongly alkaline solutions were the best method of cleaning protein-based biofilms. This research led to the most promising cleaning mechanism concepts being tested to quantitatively evaluate their cleaning effectiveness. The development of the final concept considered the requirements of New Zealand legislation and a professional code of ethics, materials issues due to the aggressive environment, structural design using finite element methods, and a heat and mass transfer analysis.
The final design solution consisted of two units. Firstly, a tank to receive the coiled belt, another insulated tank to store the sodium hydroxide cleaning solution, an overhead crane to load/unload the belt, and a transfer pump and control system to control the flow of fluids. The second unit was a separate rinser to perform the water blasting. This study resulted in the final manufacturing information for the belt washer. This includes detailed drawings and a costing for all parts and construction.
3
Sari, Lilia. "In pit crushing and belt conveyor systems." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278348.
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Mathaba, Tebello Ntsiki Don. "Energy and cost optimal scheduling of belt conveyor systems." Thesis, University of Pretoria, 2016. http://hdl.handle.net/2263/61311.
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This work deals with the energy management of belt conveyor systems (BCS) under various demandside
management (DSM) programmes. The primary objective of this work is to model the energy
consumption and energy related cost of operating troughed belt conveyor systems under different
electricity pricing tariffs. This research is motivated by the increasing need for energy efficiency and
energy cost reduction in the operation of BCS. This is as a result of technological improvements in
BCS technology leading to increasingly longer belts being commissioned and as a result of rapidly
rising electricity costs.
An energy model derived from established industry standards is proposed for long conveyors. The
newly proposed model uses a first-order partial differential equation (PDE) in order to capture the
state of material on the belt. This new model describes the conveyor's power requirement using
an equation with two parameters. A system identification set-up involving a recursive parameter
estimating algorithm is simulated for measurements with varying degrees of noise. The results show
that the proposed model estimates conveyor power and material delivered by long conveyors more
accurately than the existing steady-state models.
Downhill conveyors (DHCs) are important potential energy sources that can be tapped to improve the
overall energy efficiency of BCSs. A generic optimisation model that is able to optimally schedule three
configurations of BCS with DHC is proposed. The economic assessment of implementing dynamic
braking and regenerative drives technology on downhill conveyors is undertaken with the help of the
model. The assessment shows that combining regenerative drives and optimal operation of BCS with
DHC generates energy savings that give attractive payback period of less than 5 years.
A chance-constrained model predictive control (cc-MPC) algorithm is proposed for scheduling belt
conveyor systems with uncertain material demand on the output storage. The chance-constraints are
based on the modelling of material demand by a sum of known mean demand and, zero-mean and
normally distributed random component. The cc-MPC algorithm is shown to produce schedules that
give a smaller number and smaller magnitude of storage limit violations compared to normal MPC and
chance-constrained optimal control algorithms. An equation that gives the amount of effective storage
required to meet storage constraints for a given value of standard deviation is established.
The optimal scheduling of BCS under the real-time pricing (RTP) tariff is considered. This study
develops a methodology for establishing the economic value of price forecasting schemes for loads
capable of load-shifting. This methodology is used to show that the economic benefit obtained from
a forecast is highly dependent on the volatility of the electricity prices being predicted and not their
mean value. The methodology is also used to illustrate why the commonly used indices mean absolute
percentage error (MAPE) and root mean square error (RMSE) are poor indicators of economic benefit.
The proposed index using Kendall's rank correlation between the actual and predicted prices is shown
to be a good indicator of economic benefit, performing far better than RSME and MAPE.Thesis (PhD)--University of Pretoria, 2016.
Electrical, Electronic and Computer Engineering
PhD
Unrestricted
5
Masaki, Mukalu Sandro. "A cost-effective design approach for multiple drive belt conveyor systems." Diss., University of Pretoria, 2005. http://hdl.handle.net/2263/66217.
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Multiple drive belt conveyors are being increasingly incorporated in mining plans worldwide because of their high economic performance and the ease of moving these installations around, especially in underground mines. A typical modern multi-drive conveyor system consists of one or more intermediate drive stations positioned along the upper stretch of the conveyor and a single drive station situated in the lower stretch. Despite the acknowledged cost saving potential of the multiple drive technology, no previous work was reported on the methodology to realize a cost-effective design of multi-drive belt conveyors. This study investigates a design approach for multiple drive belt conveyors with the objective to achieve the lowest life cycle cost of multi-drive belt conveyors for a specified material transport task. For this purpose, an optimization model for the cost-effective design of multi-drive conveyor systems is formulated on the basis of the recommendations of the DIN 22101 and SANS 1313 standards. For a given number of intermediate drive stations, the proposed model optimizes a set of design parameters so that the minimum equivalent annual cost of a conveyor can be attained whilst handling the transport requirements and design conditions. The conveyor parameters optimized in this study are the rated powers of motors, the rated torques of gear reducers, the diameters and wrap angles of drive pulleys, the belt width, the belt speed, the lengths of the belt sections not nestled between drive pulleys, the spacings between idler rolls and the shell diameters and shaft diameters of idler rolls. For benchmark analysis purposes, a similar optimization model is also developed for the single drive technology. Described as mixed integer nonlinear programming (MINLP) problems, the two optimization models are solved using the MIDACO solver embedded in the MATLAB environment. The results of this study show the validity and effectiveness of the design model proposed for multi-drive belt conveyors. The results also indicate that the multiple drive technology is more beneficial for the conveying over long distances. The impact of the possible instability of inflation throughout the project lifetime is also investigated through three hypothetical scenarios, which involve a fixed inflation rate, a higher fluctuating inflation rate and a lower fluctuating inflation rate, respectively. The results of this sensitivity analysis show that the most cost-effective multi-drive belt conveyors obtained under a fixed inflation rate is robust enough against limited fluctuations of this parameter.Dissertation (MEng)--University of Pretoria, 2017.
Electrical, Electronic and Computer Engineering
MEng
Unrestricted
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Lucas, Jason David. "Improving Conveyor Belt Safety Training Through the Use of Virtual Reality." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/36374.
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Working around conveyor belts is the cause of numerous accidents each year that are costly to the mining industry. Current safety training practices generally include the use of slide show presentations, lectures, videos, and paper material before sending each worker onto site with an experienced person for on-the-job task training. These training methods are passive in nature and do not allow for an actual realization of consequences resulting from ignoring safety practices during interaction between the employee and the environment. It is with this in mind that virtual reality (VR) is being proposed as an added effective method of safety training.
In order to prove this hypothesis, a working VR prototype application of a mining environment has been developed. The application is designed in two modules. The first consists of an instructional based module, where the user is given all relevant information based on background research dealing with safety issues, hazard awareness, conveyor maintenance, and conveyor components and assemblies. The second module is a task-based training session that then tracks the userâ s performance as they complete assigned tasks.
An evaluation scheme was performed on the prototype to determine the usability and usefulness and identify areas in need of improvement. First, industry professionals were presented the application in an informal setting where the types of information and overall concept were examined and perceived usefulness was discussed. Secondly, users, both novice and industry professionals, were asked to go through the prototype training application and rate their agreement with statements based on the user interface and usability of the application. Finally, subjective interviews were performed to record perceived benefits of the virtual reality application over typical training material. This final stage consists of using both industry professionals and novice experience individuals and documenting their perceptions of benefits and challenges of using both typical methods of training and the designed prototype.
This document consists of an explanation of the research steps and papers that are published (or in press) detailing certain areas of the research, compiled findings, conclusions, and future research suggestions.Master of Science
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Joseph, Mathews. "Failure analysis in a paper mill and a coal conveyor system." Thesis, Queensland University of Technology, 1996. https://eprints.qut.edu.au/36003/1/36003_Joseph_1997.pdf.
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This thesis aims at explaining two different methods by which failure analysis can
be conducted . The two methods were used in two totally different circumstances.
One was the failure study conducted at the Petrie Mill of Australian Paper and the
other was a study of conveyor belt failures based on the author's experience at
Neyveli Lignite Corporation Limited. The bottom line is to stress the need for
separate strategies depending on the nature of industry or the machinery and the
importance of documenting the actual Failure Analysis however it may be done.
This will help in further development of the strategies and provide ideas for
newcomers in the field. Using the data obtained by applying strategy-1 Reliability
Analysis and Planned Replacement cost analysis can be conducted. Two
components selected by applying strategy-I were analysed using Relcode and are
included in this thesis. Three other major initiatives associated with this research are
Failure Recording and Spare Control system (FR&SC) for Petrie Mill, Belt
Condition Recording and Monitoring system(BEL TCON) and Conveyor Belt
Breakdown Maintenance Management flow chart for users of conveyor belts. All of
these concepts, presently in a flow-chart form, can be programmed and further
developed into a full-fledged software package. They will definitely be very handy
tools for engineers and managers who deal with similar situations. The power of
FM-EAsy software is utilized in analysing the failures in conveyor belt systems,
which involves the recording of all failure modes, effects and criticality.
8
Letestu, Andre-Charles. "Case study analysis of warm conveyor belt and low level jet phenomena." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239532.
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Strandberg, Filip, and Johan Freij. "Measuring dimensions of goods modules with 2D laser scanners on a conveyor belt." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-138482.
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A company wants to measure and verify the size of goods modules, transported on a conveyor belt, with the help of two 2D laser scanners (LMS100). The resulting measurements will be written to a database whereafter the modules will be moved by an automatic lifting device to a storage. The dimensions and possible any protrusions need to be known to avoid collision. The goal with this project is to write three modular libraries. One library for communicating with the LMS100 scanner, one library for calculating the dimensions of the goods modules and one library for handling the database. A graphical user interface (GUI) was also created which was implemented with an existing graphical library, Simple Directmedia Layer (SDL). A Raspberry Pi 3 has been used as a hardware platform which communicates with two LMS100 via ethernet. All code is written in the programming language C. LMS100 communicates with so called telegrams and the library implements these with TCP sockets. The structure of these can be found in the manufacturer’s datasheet. The calculating library uses trigonometric functions with measurement values from the scanners. The database library uses sqlite3 for a serverless database. The testing of these libraries was first done on a small scale with only one scanner and a small box placed a few decimeters in front of the scanner, to verify the functionality of the libraries. The company later provided a larger test rig with a remote controlled platform, which drove between the scanners. When measuring objects with this test rig, the system showed an adequate ability to verify the size of the goods module. An inherent measurement error of a few millimeters of the scanners is shown, but this doesn’t affect the functionality in the final product which will measure considerably larger objects. Some functions are prepared for future development but aren’t yet ready for use. The protrusions of the goods modules aren’t yet discovered by the system. The calculating library is prepared to be able to detect these, but the evaluation of them aren’t ready. If the goods module is at an angle, the system measurements will be faulty. For every scanned segment the coordinates are saved and in future development it will be able to detect the angle.Ett företag vill med hjälp av två stycken 2D-laserskannrar (LMS100) mäta och verifiera storleken på godsmoduler som transporteras på ett transportband. Mätresultatet ska skrivas till en databas varefter modulerna med en automatiskt styrd avlastare förflyttar dem till ett lager. Dimensioner och eventuella utstick på modulen måste vara kända för att undvika kollision. Målet med arbetet är att skriva tre stycken modulära bibliotek. Ett bibliotek för kommunikation med LMS100, ett bibliotek för beräkning av godsmodulens dimensioner och ett bibliotek för databashantering. Till detta skapades även ett grafiskt användargränssnitt (GUI) som implementerades med hjälp av ett färdigt grafikbibliotek, Simple Directmedia Layer (SDL). En Raspberry Pi 3 har använts som hårdvaruplattform som kommunicerar med två stycken LMS100 via ethernetanslutning. All kod skrivs i programspråket C. LMS100 kommunicerar med s.k. telegram och biblioteket implementerar dessa via TCP sockets. Strukturen på dessa går att läsa i tillverkarens datablad. Beräkningsbiblioteket använder trigonometriska funktioner med mätvärden från skannrarna för beräkning. Databasbiblioteket använder sig av sqlite3 för en serverlös databas. Testning av dessa bibliotek skedde först på en småskalig nivå med endast en skanner och en liten låda placerad några decimeter framför skannern, för att verifiera funktionaliteten på berörda bibliotek. Företaget bidrog senare med en testrig i större skala med en fjärrstyrd plattform, som körde mellan de två skannrarna. Vid mätning av objekt i denna testrig visade systemet en tillräckligt god förmåga för att kunna verifiera storlek på godsmoduler. Ett medföljt mätfel i millimeterskala finns i skannrarna, men detta påverkar inte funktionaliteten i den slutgiltiga produkten som ska mäta mycket större objekt. Vissa funktioner är förberedda för framtida utveckling men är inte färdiga för användning. Utstick på godsmodulerna upptäcks inte av systemet än. Beräkningsbiblioteket är förberett för att kunna upptäcka dessa, men utvärderingen av dem är inte färdigt. Om godsmodulen är vriden på transportbandet mäter systemet fel. Koordinater finns för varje skannat segment så att man ska kunna upptäcka denna vinkel i framtida utveckling.
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Tenser, Lori Ilene. "Stepping Off The Conveyor Belt: Gap Year Effects on the First Year College Experience." Thesis, Boston College, 2015. http://hdl.handle.net/2345/bc-ir:104364.
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Thesis advisor: Karen D. ArnoldTaking a gap year between high school and college has become more common in the United States in recent years, yet little research attempts to describe or analyze the experience of the students who arrive on college campuses after such a year out. This qualitative study followed 12 first-year students attending highly-selective private institutions in the northeastern U.S. as they experienced the transitions from high school to gap year to college. With varying levels of family support and high levels of personal motivation, the students participated in a wide range of gap-year endeavors. The findings indicate that students were heavily influenced by their encounters during the gap year, leading to strong evidence of self-authorship among the participants, which in turn shaped the way students pursued their goals when they arrived at college. Particularly influential were encounters that involved independent problem-solving, participating in multigenerational relationships, and immersion in new cultural settings. The students' transitions to college during the first year were marked by patterns of Sovereign Engagement with regard to learning, relationships, and decision-making. Commonly marked by internalized goals, authenticity in relationships, and greater individual agency, "Sovereign Engagement" captures the self-authored perspective that these students brought to their college experience. Contrary to suggestions in the popular media, not all gap-year students found the transition to be seamless; nor were they uniformly motivated to earn good grades. As a summary of the findings, the Gap Year Impact Model provides an important frame of reference for understanding the experiences, needs, and sovereign decision-making patterns of gap-year students. The results offer students, parents, colleges and universities an introduction to the lived experiences of gap-year students, who are arriving on campus in increasing numbers each year
Thesis (PhD) — Boston College, 2015
Submitted to: Boston College. Lynch School of Education
Discipline: Educational Leadership and Higher Education
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Çelikdemir, Özgür Aytaç Sıtkı. "An Automatic Vision Guided Position Controller In A Conveyor Belt Pick And Place System/." [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezler/master/bilgisayaryazilimi/T000585.pdf.
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Kopecký, Vojtěch. "Mechanický manipulátor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229156.
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The aim of this thesis is to design a mechanical manipulator. Work includes variants kinematics stroke belt conveyor, belt functional calculations belt and roller conveyor and risk analysis (the basis for the Declaration of Conformity) and FMEA analysis.
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Maxwell, Andrew Paul. "Interrogation of on-line images of bulk particulate materials." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326534.
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Bona, Marcus, Markus Beha, and Jens Sumpf. "Detachable Connection for Thin Homogeneous Conveyor Belts in the Food Industry." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-231714.
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Belt conveyor systems play an important role in many areas of industrial production. Thereby, the transport of foods demands special requirements and restrictions to avoid contamination and microbial growth. The belts used here are often manufactured as yard goods for technical production reasons. After cutting these belts to length, it is necessary to join the ends together. To guarantee assembly, the belts are among other things equipped with detachable connections. Accordingly, this article deals with the development of new detachable connection for thin unreinforced conveyor belts in the food industry. Besides reduction of critical areas (undercuts, breakthroughs …) which favor the accumulation of bacteria additional focuses are the increase of tensile strength as well as a simple and fast assembly and disassembly of the belt to ensure cleaning and disinfection. Moreover, effective and economic production technologies should be appliedBandförderer spielen in vielen Industriebereichen eine wichtige Rolle. Der Transport von Lebensmitteln stellt dabei aufgrund von Verschmutzung und Mikrobenbildung besondere Anforderungen und Restriktionen an das Fördersystem. Hier verwendete lebensmittelkonforme Bänder werden aus fertigungstechnischen Gründen oft als Meterware produziert, im Anschluss auf Länge geschnitten und die Enden verbunden. Um die Montage zu gewährleisten kommen dazu unter anderem lösbare Bandverbindungen zum Einsatz. Der Beitrag befasst sich entsprechend mit der Entwicklung einer neuen lösbaren Verbindung für dünne, unverstärkte Förderbänder in der Lebensmittelindustrie. Neben der Reduzierung von kritischen Bereichen wie Hinterschnitten und Durchbrüchen liegen weitere Augenmerke auf der Erhöhung der Zugfestigkeit, sowie einer einfachen und schnellen Montage bzw. Demontage der Verbindung zu Reinigungszwecken. Zudem soll eine wirtschaftliche Fertigung gewährleistet werden
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Курочкін, Валерій Борисович, Валерий Борисович Курочкин, Valerii Borysovych Kurochkin, С. И. Салтанов, and А. В. Пилипенко. "Особенности расчета ресурса и запаса прочности передач гибкой связью." Thesis, Изд-во СумГУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/6293.
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Menoušek, Martin. "Separátor horniny." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230000.
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Kliš, Kamil. "Pohon pásového dopravníku pro transport uhlí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230456.
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This diploma thesis deals with designing a drivetrain for a coal belt conveyor. Thesis contains necessary calculations according to norms needed for determining suitable components of a belt conveyor. The goal of this diploma thesis was to design a drivetrain for a belt conveyor, all its components including a frame of the drivetrain and to create drawing documentation.
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Slater, Tim Paul. "Strong winds in extratropical cyclones." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/strong-winds-in-extratropical-cyclones(c45f2c25-68ce-4267-a17c-0ee6951bde76).html.
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This thesis was funded by the Natural Environment Research Council (NERC) and is presented in an alternative thesis format. The thesis consists of three separate journal articles which form a coherent research project. Paper 1 investigates the development of strong winds in a dry, idealised extratropical cyclone using the horizontal momentum equation. In particular, the southwest wind maximum that develops was found to contain air parcels from three airstreams. The development of the horizontal along-flow forces around the cyclone and along trajectories entering the southwest wind maximum were analysed. An attempt to extend this methodology to a moist, idealised extratropical cyclone was made. However, the effect of adding moisture to the initial condition was found to be negligible. The reasons for this are explored in Paper 2, which documents this finding: that the effect of moisture on the development of an idealised, baroclinic wave is sensitive to the choice of initial condition. Paper 3 applies the horizontal momentum equation diagnostics to an intense, marine extratropical cyclone that brought strong winds to Ireland and the United Kingdom on 12 February 2014. The development of strong winds in Cyclone Tini was investigated by turning off latent heat release and surface fluxes. In the absence of latent heat release a weaker wind maximum developed. However, the simulation without surface fluxes had a very similar vertical structure of the horizontal wind to the full-physics simulation, but a weaker surface wind maximum. The reason for this weaker wind maximum was analysed using the quasigeostrophic omega equation. This analysis demonstrated a maximum in forcing for descent southwest of the low both in the full-physics simulation and in the simulation without surface fluxes, however strong winds were prevented from reaching the surface in the simulation without surface fluxes because of a more stable boundary layer around the bent-back front.
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Worlikar, Poonam. "An Interactive Digital Manual For Safety Around Conveyor Belts In Surface Mining." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/33074.
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Belt conveyor accidents are mainly attributed to negligence of safety procedures during maintenance work. Entanglement, falling from heights, & collapse of structure or loose materials are the main cause of accidents. While performing maintenance tasks such as cleaning, installation and repair, belt alignment and so on (Lucas et. al. 2007). Current industry safety programs provide general guidelines for safety training, but do not require any specific training program structure (Shultz, 2002 and Shultz, 2003). For example MSHA (Mine Safety and Health Administration) only requires 24 hours of training. Typically this training is broken down into four hours of training before the employee starts work, the remaining 20 hours has to be performed within the first sixty days of work (Goldbeck, 2003). The information collected through site visits showed that in addition to completing MSHA safety training requirements companies try to reinforce safety issues through daily and weekly safety meetings on job sites. Due to lack of a required safety training structure, every company is independent in terms of their training format that they follow to train their new and experienced work force. As a result, safety engineers depend heavily on in-house safety programs (e.g. audio-video presentations) to deliver the required training hours specified by MSHA for miners.
Based on a review of current training methods this research identifies four problems; existing training methods to educate miners about dangers involved in conveyor belt environments are mainly passive, safety related information in scattered in various media such as images, videos, paper manuals, etc., access to information in current format is difficult, and updating information is difficult.
This research addressed these identified problems by devising a new approach of learning to augment existing methods of training and evaluate the potential of this concept as a safety-training tool. Research has shown that individuals have their own learning style in which they can increase their retention and stimulate their cognitive learning. The proposed work addresses issues relative to passive vs. active learning and classroom-based vs. self-paced training by developing and implementing an interactive multimedia-based safety-training tool called the Digital Safety Manual (DSM). After the DSM was developed it was put through a series of usability evaluation and subjective analysis to measure the potential of the concept. The evaluation and subjective analysis involved both the novice and expert users.
The results that were yield after the evaluations and subjective analysis shows that the DSM has more learning advantages than the typical training methods and it can be used as a supplementary training method to complement the current approaches of training.
Master of Science
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Косенко, І. М., Дмитро Олексійович Жигилій, Дмитрий Алексеевич Жигилий, and Dmytro Oleksiiovych Zhyhylii. "Врахування тертя в опорах стрічкового конвеєра." Thesis, Сумський державний університет, 2016. http://essuir.sumdu.edu.ua/handle/123456789/46141.
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Стрічковий конвейер є транспортним пристроєм безперервної дії з об’єднаним вантажонесучим і тяговим органом у вигляді замкнутої гнучкої стрічки. Стрічка рухається силою тертя між нею і приводним барабаном і спирається всією довжиною на стаціонарні роликоопори. У шахтах і кар'єрах
стрічкові конвеєри служать для транспортування корисних копалин і породи з прохідницьких, розкривних і видобувних вибоїв горизонтальними і похилими виробками всередині гірських підприємств, підйому їх на
поверхню і подальшого переміщення до збагачувальної фабрики або навантажувального пункту зовнішнього транспорту, а породи – в відвал.
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Lauko, Matúš. "Návrh řídicího systému pásového dopravníku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378726.
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This master’s thesis deals with conveyor belt control design. Control system is created in LabVIEW environment. Application uses machine vision for monitoring objects on the conveyor belt. In the first part there is theoretical background. In the next parts there are described design, implementation and verification of created control system.
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Johansen, van Delft Tord. "Modeling and Model Predictive Control of a Conveyor-Belt Dryer : Applied to the Drying of Fish Feed." Thesis, Norges Teknisk-Naturvitenskaplige Universitet, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-20947.
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Moisture control of industrial processes is often difficult and complex. The product composition and moisture content changes as disturbances affect the upstream production processes. When there are changes in the product content, simple control configurations may not work due to changes in the drying characteristics of the product. This thesis presents a general conveyor-belt dryer model describing a six-zone multiple-pass dryer, accounting for the falling rate drying period, input disturbances, conveyor-belts with different belt speeds and product bed heights. In addition, a description is presented of how linear input dynamics can be included in the dryer model. Furthermore, open loop simulations are performed in order to investigate the behavior of the model. The model is linearized and reduced, in order to be utilized in a model-based control solution (MPC), where stability and feasibility is ensured through an algorithm based on known techniques within the field of model predictive control (e.g. infinite horizon optimalization, target optimalization routine, soft constraints and a Kalman filter). Several closed loop simulation examples are presented, illustrating reference steps and disturbance rejection. Furthermore, a modeling error is introduced in order to investigate the limitations imposed by model uncertainty. Finally, a basic control solution (PI control) is compared to the model-based control.
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Drápalík, Martin. "Pásový dopravník přestavitelný." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231119.
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The aim of this thesis is to design a conveyor belt readjustable to transport brown coal according to specific parameters. The introduction is focused on describing and dividing conveyor belts and characterizing their individual parts. The main part of the thesis is a description of selected components and design solutions, a functional computation carried out in accordance with the standard ČSN ISO 5048 and further an analysis of transported material's properties. The drafting documentation is attached to the thesis.
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Drápalík, Martin. "Pásový dopravník přestavitelný." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241913.
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The aim of this thesis is to design a conveyor belt readjustable to transport brown coal according to specific parameters. The introduction is focused on describing and dividing conveyor belts and characterizing their individual parts. The main part of the thesis is a description of selected components and design solutions, a functional computation carried out in accordance with the standard ČSN ISO 5048 and further an analysis of transported material's properties. The drafting documentation is attached to the thesis.
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Schäfler, Andreas. "Investigation of the Warm Conveyor Belt Inflow - a combined approach using airborne lidar observations and ECMWF model simulations." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-141285.
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Bobkovič, Štefan. "Konstrukční návrh průběžného mísiče o výkonu 5-12 tun/hod." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230206.
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The aim of this diploma thesis is the structural design of continous mixer with output range 5-12 tons per hour. The work contains a brief description of mixing technology and basic parameters of similar machines. The work is devoted to the design of double-arm sand mixer with a belt conveyor. An important part of this diploma thesis is a 3D model of fundamental parts of sand mixer, as well as its composition. Based on the 3D model is elaborated strenght analysis of selected parts with finite element method. The work is accompanied by manufacturing drawings of selected components and assembly drawing of deposit of mixing blades to the shaft.
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Pokorný, Prokop. "Pohon pojezdu výsuvové hlavy pásového dopravníku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231756.
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This master's thesis makes a brief comparison of design variants of belt conveyors with variable length including examples of use. The thesis is also deals with design of travel drive of movable head, witch is a part of propel station of belt conveyor for long distance belt conveyor systems. The thesis perform static analysis of steel structure of movable head. This thesis can serve as guidance for handling similar projects. Contains basic drawings of movable head steel structure and components of the movable head travel drive.
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Baker, Timothy Peter. "The dynamics of the cold conveyor belt and sting jet in an extratropical cyclone and the influence of diabatic processes." Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/9266/.
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This thesis examines the influences on the development of high winds in a case of a damaging extratropical cyclone. Extratropical cyclones are a regular occurrence over the United Kingdom (UK) and much of western Europe: strong cyclones can cause major damage and disruption through high winds, flooding and wave damage. Cyclone Friedhelm occurred on the 7th-8th December 2011, and was observed as part of the "DIAbatic Influence on Mesoscale features in ExTratropical Storms" (DIAMET) field campaign. A case of explosive cyclogenesis, Cyclone Friedhelm exhibited a deepening of 44 hPa in 24 hours, almost double that necessary to be considered a meteorological "bomb". As the storm passed over the UK, strong winds caused widespread damage and disruption, particularly across Scotland. These high winds and their influences are the focus of this thesis, in particular the high-wind region to the south-west of the cyclone centre, in which two high wind phenomena can occur, the cold-conveyor belt (CCB) and sting jets (SJ). The Weather Research and Forecasting (WRF) model is used with a high-resolution setup to investigate the mesoscale wind features, while a lower-resolution configuration is employed to examine the large-scale storm development. The high-resolution simulation is compared to routine observations, and those made specifically as part of the DIAMET project. The WRF model is shown to recreate the storm with a good degree of accuracy. The dynamics of the high wind regions are investigated in order to identify the features and the processes that contribute to their evolution. Trajectories are used to identify parcel ensembles resembling both the SJ and CCB. The effects of forces and balanced flows are discussed and a novel way to calculate the gradient flow is presented. The results of this analysis show a systematic region of super-gradient flow to the south and south-west of the cyclone centre and a region of sub-gradient flow to the north. The SJ parcels are analysed in relation to the past literature including a number of different theories on the cause of the SJ’s descent. Unlike some theories on SJs, latent cooling is shown to have little effect on the wind field, although it does change trajectory evolution. The lower-resolution setup shows that latent heating is key to the deepening of the cyclone, but little change in the track is observed when it is removed. The low-level PV anomaly is shown to be key in driving the deepening of the storm. Varying the time during the simulation at which latent heating is switched off shows the importance of the cyclone’s deepening rate on the wind speed development. Other novel analyses are conducted in order to examine the relationships between circulation and the high winds, showing a strong relationship between the circulation energy and cyclone pressure.
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Richtr, Pavel. "Navíječ pryžových dopravníkových pásů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229152.
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Andersson, Tobias. "Analysis of 3D surface data for on-line determination of the size distribution of iron ore pellet piles on conveyor belt." Licentiate thesis, Luleå : Luleå University of Technology, 2007. http://epubl.luth.se/1402-1757/2007/48.
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Rychtářík, Jan. "Automatizovaný dopravníkový zásobník pro vstřikovací lis s manipulátorem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229465.
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The thesis is focused on proposal of automatic transport feeder that can be used for injection moulding machines. It is concerned with conveyor belt, gravitational roller line and lift. Proposal of construction of automatic transport feeder, calculation of drive for conveyor belt and driven line is contained in this thesis. There is calculation of driveshaft, proposal of spring and calculation of bearing lifetime. Angle of conveyor of gravimetric roller line and speed at the end are calculated. Calculation of proposal of drive for lift and proposal of drive roller line on the lift is here. This thesis contains senzor, operation and steering, safety protection of feeder. There are applicability of robotic workplace and economic calculation at the end of thesis.
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Schäfler, Andreas [Verfasser], and Ulrich [Akademischer Betreuer] Schumann. "Investigation of the Warm Conveyor Belt Inflow : a combined approach using airborne lidar observations and ECMWF model simulations / Andreas Schäfler. Betreuer: Ulrich Schumann." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1021307491/34.
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Euchler, Eric, Radek Stocek, Michael Gehde, Jörg-Michael Bunzel, Wolfgang Saal, and Reinhold Kipscholl. "Fracture behavior of rubber powder modified rubber blends applied for conveying belt top covers." Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-198136.
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The aim of this study is concentrated on the experimental investigation of wear resistance of rubber powder modified rubber blends. Styrene-Butadiene-Rubber (SBR) blends applied for conveying belt top covers have been modified by ground rubber (rubber powder) based on SBR. We theoretically described the rubber wear mechanism due to loading conditions occurring at conveyor belts in the field, to simulate wear behavior of top cover rubber materials. An own developed testing equipment based on gravimetric determination of mass loss of rubber test specimen was used investigating dynamic wear with respect to fracture properties of top cover materials. Furthermore we investigated fatigue crack growth (FCG) data over a broad range of tearing energy by Tear Analyzer to characterize crack propagation behavior of rubber powder modified rubber blends. Thus, we demonstrate the influence of rubber powder on resistance against occurrence of fracture as well as dynamic wear as a function of the rubber powder content in rubber blends applied for conveying belt top covers.
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Baňka, Zdeněk. "Modernizace studeného dávkování pro výrobu betonových prefabrikátů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230531.
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This master´s thesis deals with the modernization of several years operating equipment of cold dosing for production of concrete. Solves the complete design of a new conveyor and problems identified in the operation of the device.
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Euchler, Eric, Radek Stocek, Michael Gehde, Jörg-Michael Bunzel, Wolfgang Saal, and Reinhold Kipscholl. "Fracture behavior of rubber powder modified rubber blends applied for conveying belt top covers." Technische Universität Chemnitz, 2014. https://monarch.qucosa.de/id/qucosa%3A20409.
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The aim of this study is concentrated on the experimental investigation of wear resistance of rubber powder modified rubber blends. Styrene-Butadiene-Rubber (SBR) blends applied for conveying belt top covers have been modified by ground rubber (rubber powder) based on SBR. We theoretically described the rubber wear mechanism due to loading conditions occurring at conveyor belts in the field, to simulate wear behavior of top cover rubber materials. An own developed testing equipment based on gravimetric determination of mass loss of rubber test specimen was used investigating dynamic wear with respect to fracture properties of top cover materials. Furthermore we investigated fatigue crack growth (FCG) data over a broad range of tearing energy by Tear Analyzer to characterize crack propagation behavior of rubber powder modified rubber blends. Thus, we demonstrate the influence of rubber powder on resistance against occurrence of fracture as well as dynamic wear as a function of the rubber powder content in rubber blends applied for conveying belt top covers.
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Hübler, Jörg, and Niels Dallinger. "High-Speed Conveying System." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-231660.
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Increasingly higher and higher conveyor speeds are driven in industrial manufacturing. This goes along with a significant rise of the sound pressure level in the production lines. The main cause of this is the articulated and multi-articulated construction of standard plastic-slide-chains in conveyor systems. This condition could be significantly improved by the use of a nonarticulated attraction in the form of a transport toothed belt. In addition, the conveying speeds could be significantly increased. Modifications to the belt teeth provide fastening possibilities for plastic support platesZunehmend werden immer höhere Fördergeschwindigkeiten in industriellen Anlagen gefahren. Dies geht einher mit einer signifikanten Erhöhung des Schalldruckpegels der Anlagen. Die Hauptursache dafür liegt im gliederartigen sowie mehrgelenkigen Aufbau von Standard-Kunststoffgleitketten in Förderanlagen. Dieser Zustand konnte durch die Verwendung eines gliederlosen Zugmittels in Form eines Transportzahnriemens deutlich verbessert sowie die Transportgeschwindigkeiten signifikant erhöht werden. Durch Modifikationen an den Riemen-zähnen werden Befestigungsmöglichkeiten für Kunststofftragplatten geschaffen
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Falta, Libor. "Robotizované pracoviště pro ukládání 25 kg pytlů maltové směsi na paletu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231233.
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The aim of this thesis is to create the design of a robotic workstation (RWS) for storing bags on a pallets with a capacity of 600 bags per hour. As an introduction to the issues of solved task, the introductory part of the thesis deals with a general information about industrial robots, theories ofdesigning RWS and palletization. For the suggested workstation it is given to have one pickup place from the roller conveyor and two unloading places. Within the RWS it is used belt, roller and chain conveyors as a peripheral device for conveying bags and pallets. There are two variants of RWS created for the possibility of technically - economic assessment. Solution for the security and the ergonomy of the workplace are an integral part of the study. Selected components of RWS have their risk analysis carried out. There is also the draft of a robot gripper mentioned, including assembly drawing. In conclussion there is calculation of returning of funds invested in the construction of RWS. Drawings of robotized workplace disposition, schemes of pneumatic and electrical connections and block diagram of the control system of RWS are included as attachments.
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Sanches, José Afonso. "Understanding the dynamics of a tunnel oven : Use of infrared sensors to measure the temperature of the conveyor belt in a tunnel oven used in bread production." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70363.
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During the continuous production of bread sometimes there are problems that lead to interruptions in the production and consequently to quality problems. One such problem is the bread burning in the contact area between the bread and the conveyor belt. In order to understand the problem and to know how to quantify it, it is necessary to understand what a thermodynamic system is and what types of systems exist, how the various types of heat transfer are processed, how to measure the temperature of an object by infrared radiation and some mathematical methods such as the least square root method. Temperature measurements were planned and carried out. The goal with the first experiment was to understand how the temperature of the conveyor belt varies during an interruption. All the other tests were done to investigate the effects of different solutions in the temperature variation of the belt. According to the results, the best solution is to turn off the oven during an interruption and the worst to spray the belt with water. To spray the belt with water may be a better solution than these results shows, but it is very affected by other problems, like depositions of limestone on the nozzles. A lot more solutions could be found but due to the time available, it was not possible to investigate all the variables/solutions in the process. A long-term study would help understand much more within the regulation of the industrial baking process.Under kontinuerlig produktion av bröd finns det ibland problem som leder till avbrott i produktionen och kvalitetsproblem. Ett sådant problem är att brödet blir bränt i kontaktytan mellan brödet och transportbandet. För att förstå problemet och veta hur man kvantifierar detta, är det nödvändigt att förstå vad ett termodynamiskt system är och vilka typer av system finns, hur olika typer av värmeöverföring sker, hur man mäter temperatur med hjälp av infraröd strålning och några matematiska metoder som minst kvadratrotsmetoden. Temperaturmätningar planerades och genomfördes. Målet med det första experimentet var att förstå hur transportbandets temperatur varierar under ett huppehåll. Alla andra tester utförades för att undersöka effekterna av de olika lösningarna i bandets temperaturvariation. Enligt resultaten är den bästa lösningen att stänga av ugnen under ett uppehåll och det värsta att spreya bältet med vatten. Att spreya bältet med vatten kan vara en bättre lösning än vad resultaten visar, men det påverkas mycket av andra problem, som avsättningar av kalksten på munstyckena. Många fler lösningar kunde hittas men det var inte möjligt att undersöka alla variabler / lösningar i processen på grund av tillgänglig tid. En långsiktig studie skulle hjälpa till att förstå mycket mer inom regleringen av industriell bakning.
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Hohner, Robin, and Ekengren André. "Study Of Belts Acting As A Positioning System For Interconnected Gripping Tools In Tube Filling Machines." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-77221.
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The task performed in this assignment is to improve the reliability of Norden Machinery ABs product family. This is to be done by examining and replacing the belt used to stop the spreading of tubes from ingoing shipping crate to the infeed of the machine. The way that this was approached was by testing different candidates on a spectrum of their rigidity to find if a flexible or more rigid belt would perform better than the current context of the system. The testing was conducted for a period of 4 weeks and results were gathered by examining damages to the belts by the use of microscope. After the damage had been analyzed the conclusion was drawn that flexible alternatives seems to perform the task better than their rigid counterparts however more work is needed in the fields regarding the fastening and operation of the machine to use the best suited candidates derived from this test, the monolithic belt FMT-02TXCT-U1.
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Šťastný, Michal. "Optimalizace uspořádání lisovací linky na výrobu reflektorů ve firmě Automotive Lighting." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230428.
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This thesis deals with optimization of a press line part for the manufacture of reflectors present at the Automotive Lighting Company, Jihlava. The first part focuses on describing the current workplace layout of the press line. The workplaces are located inconveniently and thus require a larger number of operators and a considerable amount of manual work. The second part of the thesis proposes layout solutions for the injection presses and for other machine parts. At the same time, a smoother transition design is proposed for the press line and for the manufacturing section that follows. Based on an evaluation of selected criteria, the optimum version is chosen, thereby adding to the efficiency of the molding process by reducing the number of operators required, by lowering the proportion of manual work relative to other activities, and by limiting the risk of poor quality. The conclusion of the thesis sums up the necessary investment costs and offers an economic assessment of introducing the selected press line arrangement to operation.
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Kvita, Josef. "Podlahový dopravník a výklopné čelo velkoobjemové nástavby." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231933.
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The aim of this work is to design belt conveyor and front and rear hydraulic moved tailboard for large volume carrier body. The carrier body is constructed for silage with emptying time lower than one minute. This work also contains choice of concept of the proposed solutions, than their calculation and the design itself. The work is accompanied by drawings.
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Roessner, Daniel. "Contribution à l'étude du comportement mécanique des carcasses textiles de bandes transporteuses : optimisation de la jonction." Thesis, Mulhouse, 2010. http://www.theses.fr/2010MULH4553/document.
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La bande transporteuse est utilisée dans l’industrie pour acheminer de la matière ou des objets dans de multiples domaines d’applications tels que les mines souterraines ou aériennes, les carrières, l’industrie alimentaire, l’industrie agricole ou les supermarchés. Ses composants lui permettent de travailler dans des conditions extrêmement difficiles. L’intérêt est porté sur les bandes transporteuses de mines de fond dont les contraintes de fonctionnement et d’acheminement sont particulières. En effet, la bande est acheminée sur rouleaux et jonctionnée sur le site de l’utilisateur pour former une bande sans fin. La jonction est le point faible de la bande transporteuse car sa résistance représente 50% seulement de la force de rupture nominale de la bande. L’objet de cette étude est de proposer une nouvelle solution de jonctionnement.Après avoir analysé les différentes contraintes mécaniques et chimiques auxquelles la bande transporteuse est soumise, une étude comparative sur les différents types de jonctions a été menée.Il y a les jonctions chimiques et les jonctions mécaniques. Chacune a des avantages et des inconvénients en termes de coût ou de longévité, qui ont été présentés. Dans un troisième temps, une étude a été menée sur la compréhension du comportement de rupture de la jonction mécanique. L’étude sur la jonction a été réalisée à l’aide d’un montage expérimental conçu spécifiquement. L’influence des paramètres de la jonction a pu être évaluée grâce à un nouvel indicateur adimensionnel représentant l’efficacité de la jonction par rapport à la bande normale (Junction Tensile Strength Efficiency : JTSE). Dans un quatrième temps, une étude a été faite sur un système de jonction innovant par couture. La jonction réalisée a été testée sur un banc de traction pour en vérifier l’efficacité, puis des essais ont été effectués sur un banc dynamique pour en étudier la fatigue. La jonction cousue est une innovation qui permet de dégager de nouvelles perspectives dans le jonctionnement des bandes transporteusesThe conveyor belt is used as a material and object transportation tool in a lot of industries such as underground mines, quarries, food industries, agribusinesses or supermarkets. The studied subject is the underground mine conveyor belt, because of their transportation and use difficult conditions.Indeed, the conveyor belt must be cut to be dispatched using belt reeling and joined afterwards in the underground mine forming an endless belt. However, the junction is the weakest part of the conveyor belt due to the 50% belt weakening. The aim of this study is to propose a new junction solution. After analysing the underground belt mechanical and chemical use conditions, the different junction types have been analysed. A junction advantage and inconvenience comparison has been presented. Then, the junction mechanical behaviour has been studied using an original mechanical setup reproducing the mechanical junction. The different parameter influence has been evaluated using a new adimensional indicator called junction tensile strength efficiency. In the last part, a new junction solution made by a sewn has been explored. The sewn junction tensile efficiency has been tested on a tensile strength machine and its fatigue efficiency has been verified through dynamic tests. New outlines in the conveyor belt joining are open as a result of the sewn junction solution development
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Ali, Agha Rehmat. "Predicted Speed Control based on Fuzzy Logic for Belt Conveyors : Fuzzy Logic Control for Belt Conveyors." Thesis, Karlstads universitet, Avdelningen för fysik och elektroteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-70106.
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In order to achieve energy savings for belt conveyor system, speed control provides one of the best solutions. Most of the traditional belt conveyors used in the industries are based on constant speed for all operational times. Due to the need and advancements in technology, Variable Frequency Drives (VFD) are employed in industries for a number of processes. Passive Speed Control was previously suggested for the proper utilization of VFD to make belt conveyor systems more power e- cient with increased life expectancy and reduced environmental eects including the noise reduction caused by constant speed of operation. Due to certain conditions and nature of operation of belt conveyor systems, it is not desirable to use Passive Speed control where feeding rate is random. Due to the extreme non-linearity of the random feeding rate, an Active speed control for VFD is desired which adjusts belt speed according to the material loading. In this thesis an Active Speed control for VFD is proposed that can achieve energy and cost ecient solutions for belt conveyor systems as well as avoiding half-lled belt operations. The aim of this thesis work is primarily to determine reliability and validity of Active Speed Control in terms of power savings. Besides achieving power savings, it is also necessary to check the economic feasibility. A detailed study is performed on the feasibility of Active Speed Control for random feeding rate according to industrial requirements. Due to the random and non-linearity of the material loading on the belt conveyor systems, a fuzzy logic algorithm is developed using the DIN 22101 model. The developed model achieves Active Speed Control based on the feeding rate and thereby optimizes the belt speed as required. This model also overcomes the risks of material spillage, overloading and sudden jerks caused due to unpredicted rise and fall during loading. The model conserves 20- 23% of the total power utilized compared to the conventional conveyor systems in use. However it is noticed that the peak power of conventional conveyor belt systems is up to 16% less compared to the proposed model. If implemented in dierent industries, based on the operational time and total consumption of electricity, the proposed Active speed control system is expected to achieve economic savings up to 10-12 % .
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Marx, Dirk Johannes Lewies. "Energy audit methodology for belt conveyors." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-04112007-145509.
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Wang, Junhan, and Цзюньхань Ван. "Preliminary design of the short-range passenger aircraft with 68 passenger capacity." Thesis, National Aviation University, 2021. https://er.nau.edu.ua/handle/NAU/53196.
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Робота публікується згідно наказу Ректора НАУ від 27.05.2021 р. №311/од "Про розміщення кваліфікаційних робіт здобувачів вищої освіти в репозиторії університету". Керівник роботи: професор, д.т.н. Карускевич Михайло ВіталійовичThis bachelor thesis is dedicated to the design of short-range passenger aircraft with 68 passenger capacity and its design characteristics. The methods of design are analysis of the advanced prototypes and selections of the most efficient technical decisions for application in new aircraft design. The design approach is to analyze advanced prototypes and borrow its advanced characteristics and geometric date for the new aircraft design.
Ця бакалаврська робота присвячена конструкції пасажирського літака малої дальності на 68 пасажирів та його конструктивним характеристикам. Методами проектування є аналіз передових прототипів і вибір найбільш ефективних технічних рішень для застосування в нових конструкціях літаків. Підхід до проектування полягає в тому, щоб проаналізувати передові прототипи та запозичити його передові характеристики та геометричну дату для нового дизайну літака.
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Wicherek, Štěpán. "Prezentační pavilon Papírny WANEMI, a.s. v Zábřehu." Master's thesis, Vysoké učení technické v Brně. Fakulta architektury, 2010. http://www.nusl.cz/ntk/nusl-215731.
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The multi-purpose exhibition hall and office building with the facilities is located in front of the manufacturing estate, situated in a green belt near the main access road. The height of the main office building helps to create a point of reference for the entire plant. A unique textile – lateral facade - STAMISOL FT 381 – is divided into basic, regular, quadratic segments. The textile facade is made to evoke a paper sheet. The exhibition pavilion is acros from the Office tower. The idea was to pick up on old industrial building design. Bringing the architecture into harmony with nature was also a key point of the design. Using a rough CORTEN steel construction parts in tree – shaped design was a purpose. The connecting tunnels are here to remind on old industrial conveyors. The office building rises out of ground wave in which all facilities, storage areas, waste managment units, and stuff parking lots are located. Ground wave also screens out the storage and facilities A lagoon serves as a integrating element for all building stuctures.
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Черниш, Максим Леонідович. "Робототехнічний пристрій для завантаження дробарки." Магістерська робота, Київський національний університет технологій та дизайну, 2021. https://er.knutd.edu.ua/handle/123456789/18567.
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Робота присвячена аналізу робототехнічних пристроїв. В межах роботи виконано аналіз існуючих конструкцій завантажувальних пристроїв. Описаний принцип роботи та кінематична схема розвантажувача з стрічкового конвеєру плужкового типу. Представлені розрахунки габаритних розмірів стрічки, тяговий розрахунок, показана діаграма натягу і розмір стрічки для подальшого проєктування плужкового скидача. Перелічено вимоги щодо безпеки і охорони навколишнього середовища, а саме вимоги до повітря робочої зони, виробничого освітлення, виробничого шуму і вібрації, електробезпеки, безпеки технологічних процесів та пожежної безпеки. Також було проведено аналіз небезпеки об’єкта.Работа посвящена анализу робототехнических устройств. В работе выполнен анализ существующих конструкций загрузочных устройств. Описан принцип работы и кинематическая схема загрузчика плужкового типа с ленточного конвейера в дробилку. Представлены расчеты габаритных размеров ленты, тяговый расчет, показана диаграмма натяжения, выполнен расчет размера ленты для дальнейшего проектирования плужкового сбрасывателя (загружателя). Перечислены требования к безопасности и охране окружающей среды, а именно требования к воздуху рабочей зоны, производственному освещению, производственному шуму и вибрации, электробезопасности, безопасности технологических процессов и пожарной безопасности. Также был проведен анализ опасности объекта.
The work is devoted to the analysis of robotic devices. As part of the work an analysis of existing structures of loading devices was performed. The principle of operation and kinematic scheme of the unloader from the belt conveyor of plow type are described. The calculations of the overall dimensions of the tape, traction calculation, the diagram of tension and the size of the tape for the further design of the plow dump are presented. The requirements for safety and environmental protection are listed, namely the requirements for the air of the working area, industrial lighting, industrial noise and vibration, electrical safety, safety of technological processes and fire safety. An object hazard analysis was also performed.
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Freydier, Perrine. "Dynamique interne au front d'écoulements à surface libre. Application aux laves torrentielles." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAU010/document.
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Le modèle de couche mince intégré sur l'épaisseur, Saint-Venant, utilisé classiquement pour simuler la propagation de laves torrentielles et coulées boueuses, repose sur plusieurs approximations concernant la forme des profils de vitesse en zones non-uniformes. Il est pourtant nécessaire d'utiliser ce type de modélisation, comme outil d'aide à la gestion des risques liés aux laves torrentielles. Nous proposons d'éprouver ses hypothèses, en observant une zone fortement non-uniforme, le front de coulées à surface libre et le champ de vitesse à l'intérieur de cette zone.En améliorant notre connaissance de l'évolution de la forme des profils de vitesse (de la dynamique interne) au front de coulées, nous cherchons à améliorer les modèles de couche mince. Cette thèse porte donc sur l'étude de la dynamique interne au front d'écoulements à surface libre de fluides newtoniens et viscoplastiques.Nous avons utilisé le dispositif du canal à fond mobile qui permet de générer des coulées stationnaires dans le référentiel de l'observateur au moyen d'un fond mobile remontant vers l'amont. Nous avons réalisé un travail technique sur ce canal et sur l'analyse des images pour pouvoir mesurer les champs de vitesse à haute résolution spatiale aux fronts de coulées à surface libre de fluides viscoplastiques. L'étude des fluides newtoniens a aussi été réalisée afin de valider les modèles et éprouver le dispositif expérimental.Nous avons comparé les résultats expérimentaux aux solutions théoriques de deux modèles de couche mince adaptés à la rhéologie de Herschel-Bulkley : le modèle classique de la lubrification, à la base du modèle de Saint-Venant et un modèle consistant à l'ordre 1 développé dans cette thèse. Le modèle consistant d'ordre 1 est la somme du modèle à l'ordre 0 (la lubrification) et de termes correctifs qui proviennent des contraintes normales et des termes d'inertie. Dans le cadre de notre configuration du fond mobile remontant vers l'amont, il est possible de déduire la forme du front en cherchant une solution de type onde progressive, sans passer par un modèle intégré dans l'épaisseur.Pour les fluides viscoplastiques, la structure classique du profil de vitesse, avec une zone cisaillée surmontée d'un plug non cisaillé est bien reconnaissable sur nos profils de vitesse en zone uniforme, et en zone faiblement variée. Mais à l'approche du front, cependant, la vitesse de surface augmente, les profils de vitesse expérimentaux deviennent cisaillés sur toute l'épaisseur, conduisant à la disparition du plug à proximité de la ligne de front.Le modèle de lubrification prédit l’existence d'un plug dans le front jusqu'à la ligne de contact, ce qui n'est pas observé expérimentalement. La vitesse de surface du modèle de lubrification augmente à l'approche du front, mais est largement sous-estimée par rapport à la vitesse de surface mesurée. Les vitesses de surface prédites par le modèle d'ordre 1 augmentent plus drastiquement au front, en meilleur accord avec les mesures que le modèle de lubrification. Pour certaines configurations expérimentales l'accord est même très bon. Remarquablement, le cisaillement des profils de vitesse à l'approche du front, observé expérimentalement, est aussi prédit par le modèle d'ordre 1.Les profils de vitesse présentent donc une évolution au front de coulées viscoplastiques en contradiction avec les hypothèses du modèle de Saint-Venant. Le modèle consistant d'ordre 1 permet d'améliorer les prédictions. Un modèle intégré dans l'épaisseur de type Saint-Venant basé sur les développements consistants d'ordre 1 est alors calculé, car il constitue l'étape nécessaire avant d'être intégré dans un outil de simulation opérationnelA depth-averaged model based on the thin-layer assumption, called Saint-Venant (Shallow-Water), is classically used to simulate the propagation and the spreading of debris and mud flows. It is based on several approximations concerning the shape of the velocity profile in non-uniform zones. We propose to test these hypotheses, examining a strongly non-uniform zone, the front of free-surface viscoplastic flows and the velocity field within this zone. By improving our knowledge about the internal dynamics in the front zone, we seek to improve the thin-layer models. This thesis therefore focuses on the study of the internal dynamics within the front of viscoplatic free-surface flows.We used the moving conveyor belt to generate stationary flows. We carried out a technical work on this set-up, and specific analysis of images obtained from the high-speed camera, in order to be able to measure velocity fields with a high resolution. The study of a Newtonian fluid was also carried out in order to validate the lubrication model and the experimental device.We compared experimental results to theoretical solutions of two thin-layer models taking into account the Herschel-Bulkley rheology: the classical model of lubrication, which is at the base of Saint-Venant model, and a consistent first-order model specifically developed in this thesis.The first-order model is equal to the zero-order model (lubrication), plus corrective terms derived from the normal stresses and inertia terms.In this study, for the purpose of comparison with our experimental results, we are interested in travelling-wave solutions. We are able to solve the shape of the front without using a depth-averaged model.Far from the front, experimental velocity profiles clearly display the characteristic 2-layer structure predicted by the lubrication solution, with constant values close to the free-surface (plug) and a sheared layer underneath. Closer to surge tip, the shape of experimental longitudinal velocity profilesthen begins to differ from the theoretical prediction. The 2-layer structure tends to disappear, and the profiles display shear across the whole depth ofthe flow. In this tip region, surface velocity also appears to increase faster than its theoretical counterpart. Surface velocity predicted by the first-order model increase more drastically in the tip region, in better agreement with the measurements than the lubrication model. The first-order model predicts a sheared velocity profile when approaching the front, as observed experimentally.The consistent first-order model then provides better predictions about internal dynamics than lubrication model. A depth-integrated model like Saint-Venant, based on consistent first-order developments is then calculated, as a first step before being integrated into an operational simulation tool
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Souza, Renato Luvizoto Rodrigues de. "Análise do processo de regulação da atividade de triagem de materiais recicláveis: estudo de caso em uma cooperativa." Universidade Federal de São Carlos, 2014. https://repositorio.ufscar.br/handle/ufscar/3833.
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Previous issue date: 2014-12-17Financiadora de Estudos e Projetos
This dissertation discusses the construction of the operational methods in the conveyor belt of sorting recyclable materials in a collectors' cooperative. Cooperatives represent not only a way out of the problems of management of municipal solid waste, but also a possibility of integration and income generation for people who are outside the formal work. Nevertheless, the search for income and better life clashes with precarious working conditions. In this context, the aim of this study is to understand how the cooperative regulate their activity against the difficulties in the conveyor belt of sorting recyclable materials. The applied methodology includes a case study outlined by the Activity Ergonomics. The results indicate both an intense physical and mental effort associated with the collection of recyclable materials. During the activity, the cooperative members face few situations which may affect the objectives and regulate their activity without risking their internal state. Collective joints emerge from the conveyor belt as a possibility of collective regulation of the difficulties arising from the instantaneous overlapping variations (volume, variety and condition of materials) and ascending and descending requirements. These results indicate that the collection of recyclable materials is only possible through the inventiveness of the cooperative members to use perceptual exploration and solve problems facing the pace of work.
Nesta dissertação se discute a construção dos modos operatórios na esteira de triagem de materiais recicláveis em uma cooperativa de catadores. As cooperativas representam não só uma saída para os problemas de gestão dos resíduos sólidos municipais, mas também uma possibilidade de integração e geração de renda para pessoas que estão à margem do trabalho formal. Apesar disso, a busca por renda e melhor condição de vida se choca nas precárias condições de trabalho. Nesse contexto, o objetivo deste estudo é compreender como os cooperados regulam sua atividade frente às dificuldades na esteira de triagem de materiais recicláveis. A metodologia aplicada conta com um estudo de caso delineado pela Ergonomia da Atividade. Os resultados indicam um intenso esforço físico e mental associado à triagem de materiais recicláveis. Durante a atividade os cooperados se deparam com poucas situações em que podem agir sobre os objetivos e regularem sua atividade sem colocar em risco seu estado interno. As articulações coletivas emergem da esteira como uma possibilidade de regulação coletiva das dificuldades advindas das sobreposições instantâneas das variabilidades (volume, variedade e estado dos materiais) e das prescrições ascendentes e descendentes. Esses resultados indicam que a triagem de materiais recicláveis só é possível graças à inventividade dos cooperados em utilizar a exploração perceptiva e resolver problemas frente ao ritmo de trabalho.
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Mills, John. "Bacterial Community Analysis of Meat Industry Conveyor Belts." The University of Waikato, 2007. http://hdl.handle.net/10289/2236.
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At the commencement of this study, some sensitive overseas markets were rejecting chilled vacuum-packed New Zealand lamb due to higher than expected total viable counts, and counts of Enterobacteriaceae, a family of bacteria used to indicate sanitary condition. Of the many factors that influence the bacterial composition of chilled lamb in the overseas marketplace, the meat producer can only exert significant control over: Hygiene, ensuring the bacterial viable count on the meat prior to packaging is as low as possible, and comprised of as few species as possible that are capable of anaerobic growth at chilled meat temperatures. Maintaining the pH of the meat within acceptable limits, by careful animal selection and minimal pre-slaughter stress. Refrigeration temperatures, through rigorous maintenance of the cold-chain. The type of preservative packaging used, which is often limited by regulation in the marketplace. Initial work established that the bacterial microbiota present on the meat contact surfaces in the butchering facilities at some premises, in particular conveyor belting, was excessive and comprised of species that contributed to the high counts on the meat reported above. As a means of improving the hygiene of this process, this study investigated the hypothesis that some species of bacteria were able to form biofilms on the conveyor belt contact surfaces, becoming reservoirs for cross-contamination. This hypothesis was not been proven by this work; the results showing that biofilms were not present and that adequate hygiene of these surfaces instead depends on the ability to remove all meat-based residues from them at the completion of each day's processing. For premises operating interlocking belts from one manufacturer (Intraloxreg), a clean-in-place system is now available that is able to achieve this. Premises operating conventional disinfectant and water sanitisation of either continuous or interlocking belts must ensure that meat residue is completely removed before disinfection. The majority of New Zealand meat industry premises can now demonstrate that their hygienic processes in this area are under control. The microbiota of conveyor belting in this study was found to consist of bacteria from five taxonomic groups; the Flavobacteriaceae, the Actinomycetales, the Bacillus/Clostridium group, and the alpha and gamma branches of the Proteobacteria. The genera present on belts from premises whose hygiene was found to be in control did not contain species known to cause food-borne disease or spoilage of vacuum packaged meats. The bacterial viable count remains the most effective method available at this time for monitoring conveyor belt hygiene. Attempts to develop a monitoring system based on microscopy of an in-situ sampling device were unsuccessful due to an inability to penetrate the meat residue matrix. Denaturing Gradient Gel Electrophoresis (DGGE) may offer an alternative for rapid investigation of diversity, but further work is required before this can be validated for routine use.