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Thèses sur le sujet « 3D measurement systems »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 19 février 2022

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1

Ge, Youmei. "Noncontact 3D biological shape measurement from multiple views." University of Western Australia. Dept. of Computer Science, 1994. http://theses.library.uwa.edu.au/adt-WU2003.0003.

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Many clinically important applications require measurements on a large portion of the human body surface that may not be visible from a single view. For example, a single view may be insufficient for the measurement of a complete facial surface for facial plastic surgery. And observing breast surfaces from multiple views is needed in accurate breast volume measurement. On the other hand most 3D vision systems only recover 3D data from a single viewpoint and the recovered 3D data are often incomplete due to the occlusion problem and thus cannot uniquely define the surface. A unique an

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Van, Rooyen Ivän Jan-Richard. "Intelligence based error detection and classification for 3D measurement systems." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/21241.

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For many years 2D machine vision has been used to perform automated inspection and measuring in the manufacturing environment. A strong drive to automate manufacturing has meant improvements in robotics and sensor technologies. So has machine vision seen a steady movement away from 2D and towards 3D. It is necessary to research and develop software that can use these new 3D sensing equipment in novel and useful ways. One task that is particularly useful, for a variety of situations is object recognition. It was hypothesised that it should be possible to train artificial neural networks to reco

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3

Zhang, Haolin. "3D surface shape measurement using stereoscopic camera based structured light systems." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/670112.

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La mesura estructurada de la llum ens permet obtenir una forma tridimensional de superfície d’un objecte amb una gran precisió. Així, troba aplicacions àmplies en aplicacions industrials. A més, projectant patrons de franja digital a l’objecte mesurat, la llum estructurada garanteix una mesura de superfície flexible. D’ altra banda, la llum estructurada també ens permet mesurar tant objectes especulars com objectes difusors. Per a la mesura d’ objectes especulars, s’ introdueix la deflectometria. Aquí, els patrons de serrells són generats per una pantalla de cristall líquid (LCD). Per a la mes

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4

Shi, Quan. "Develop rapid 3D surface measurement systems for quality inspection in the manufacturing industry." Diss., Connect to online resource - MSU authorized users, 2008.

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Thesis (PH.D.)--Michigan State University. Electrical and Computer Engineering, 2008.<br>Title from PDF t.p. (viewed on Aug. 11, 2009) Includes bibliographical references (p. 118-121). Also issued in print.

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5

Pereira, Pedro André Marques. "Measuring the strain of metallic surfaces in real time through vision systems." Master's thesis, Universidade de Aveiro, 2015. http://hdl.handle.net/10773/16447.

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Mestrado em Engenharia Mecânica<br>Vision systems have already proven to be a useful tool in various elds. The ease of their implementation, allied to their low cost mean that their growth potential is immense. In this dissertation it is proposed a approach to measure strains in metallic surfaces, using stereo vision. This approach is based on the 3D DIC. This method measures the strain of the surface by dividing this surface in small sections, called subsets, and iteratively nding the equation that describes its shape variation through time. However, calculating the transformation of

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Solh, Mashhour M. "Depth-based 3D videos: quality measurement and synthesized view enhancement." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/43743.

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Three dimensional television (3DTV) is believed to be the future of television broadcasting that will replace current 2D HDTV technology. In the future, 3DTV will bring a more life-like and visually immersive home entertainment experience, in which users will have the freedom to navigate through the scene to choose a different viewpoint. A desired view can be synthesized at the receiver side using depth image-based rendering (DIBR). While this approach has many advantages, one of the key challenges in DIBR is generating high quality synthesized views. This work presents novel methods to measur

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Stanley, Raymond M. "Measurement and validation of bone-conduction adjustment functions in virtual 3D audio displays." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29754.

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Thesis (Ph.D)--Psychology, Georgia Institute of Technology, 2010.<br>Committee Chair: Walker, Bruce N.; Committee Member: Corballis, Paul M.; Committee Member: Corso, Gregory M.; Committee Member: Folds, Dennis J.; Committee Member: Houtsma, Adrianus J. M. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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Mäkynen, A. (Anssi). "Position-sensitive devices and sensor systems for optical tracking and displacement sensing applications." Doctoral thesis, University of Oulu, 2000. http://urn.fi/urn:isbn:9514257804.

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Abstract This thesis describes position-sensitive devices (PSDs) and optical sensor systems suitable for industrial tracking and displacement sensing applications. The main application areas of the proposed sensors include automatic pointing of a rangefinder beam and measuring the lateral displacement of an object. A conventional tracking sensor is composed of a laser illuminator, a misfocused quadrant detector (QD) receiver and a corner cube retroreflector (CCR) attached to the target. The angular displacement of a target from the receiver optical axis is detected by illuminating the targ

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Sharkasi, Adam Tawfik. "Stereo Vision Based Aerial Mapping Using GPS and Inertial Sensors." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/32263.

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The robotics field has grown in recent years to a point where unmanned systems are no longer limited by their capabilities. As such, the mission profiles for unmanned systems are becoming more and more complicated, and a demand has risen for the deployment of unmanned systems into the most complex of environments. Additionally, the objectives for unmanned systems are once more complicated by the necessity for beyond line of sight teleoperation, and in some cases complete vehicle autonomy. Such systems require adequate sensory devices for appropriate situational awareness. Additionally, a larg

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Melaika, Stasys. "3D lazerinių matavimo sistemų ypatumai." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100616_092028-47846.

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Magistrantūros baigiamojo darbo tikslas yra išanalizuoti 3D lazerines matavimo sistemas, jų panaudojimą geodeziniams darbams ir palyginti su elektroniniu tacheometru. Atliekant tyrimą buvo panaudoti teoriniai bei praktiniai duomenys ir sisteminė analizė. Tyrimo objektas- stacionarus lazerinis skeneris Riegl LMS-Z420i. Pasirinktas prietaisas yra kol kas vienintelis toks Lietuvoje. Modernios technologijos su naujausiais techniniais sprendimais dėl savo produktyvumo gauna vis didesnę reikšmę geodezijoje. Todėl būtina žinoti jų veikimo principus ir panaudojimo galimybes. 3D lazerinės matavimų sist

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Brandman, Joshua Erich. "A Physical Hash for Preventing and Detecting Cyber-Physical Attacks in Additive Manufacturing Systems." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/86412.

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This thesis proposes a new method for detecting malicious cyber-physical attacks on additive manufacturing (AM) systems. The method makes use of a physical hash, which links digital data to the manufactured part via a disconnected side-channel measurement system. The disconnection ensures that if the network and/or AM system become compromised, the manufacturer can still rely on the measurement system for attack detection. The physical hash takes the form of a QR code that contains a hash string of the nominal process parameters and toolpath. It is manufactured alongside the original geometry

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Rahayem, Mohamed. "Planar segmentation for Geometric Reverse Engineering using data from a laser profile scanner mounted on an industrial robot." Licentiate thesis, Örebro University, Department of Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-2318.

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<p>Laser scanners in combination with devices for accurate orientation like Coordinate Measuring Machines (CMM) are often used in Geometric Reverse Engineering (GRE) to measure point data. The industrial robot as a device for orientation has relatively low accuracy but the advantage of being numerically controlled, fast, flexible, rather cheap and compatible with industrial environments. It is therefore of interest to investigate if it can be used in this application.</p><p>This thesis will describe a measuring system consisting of a laser profile scanner mounted on an industrial robot with a

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Sabino, Danilo Damasceno. "Development of a 3D multi-camera measurement system based on image stitching techniques applied for dynamic measurements of large structures." Ilha Solteira, 2018. http://hdl.handle.net/11449/157103.

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Orientador: João Antonio Pereira<br>Resumo: O objetivo específico deste trabalho é estender as capacidades da técnica de rastreamento de pontos em 3 dimensões (three-dimensional point tracking – 3DPT) para identificar as características dinâmicas de estruturas grandes e complexas, tais como pás de turbina eólica. Um sistema multi-camera (composto de múltiplos sistemas de estéreo visão calibrados independentemente) é desenvolvido para obter alta resolução espacial de pontos discretos a partir de medidas de deslocamento sobre grandes áreas. Uma proposta de técnica de costura é apresentada e empr

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Shen, Anqi. "A real time 3D surface measurement system using projected line patterns." Thesis, University of Bradford, 2010. http://hdl.handle.net/10454/5399.

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This thesis is based on a research project to evaluate a quality control system for car component stamping lines. The quality control system measures the abrasion of the stamping tools by measuring the surface of the products. A 3D vision system is developed for the real time online measurement of the product surface. In this thesis, there are three main research themes. First is to produce an industrial application. All the components of this vision system are selected from industrial products and user application software is developed. A rich human machine interface for interaction with the

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Čada, Michal. "Způsobilost měření karoserie na In-line 3D měřícím zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417742.

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By developing optical measurement technologies of shapes and elements, it is now possible to measure the carbody directly in the production flow of the welding company's line for the production of cars, the so-called „In-line measurement“. When deploying this control process, you also need to process the amount of data measured using the standard described procedure for process control. The thesis presents a proposal for the introduction and control of the dimensional inspection process of the final product of the welded body.

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Qudeisat, Mohammed Ahmed. "A networked and computer-controlled multi-sensor 3D fringe projection measurement system." Thesis, Liverpool John Moores University, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.589740.

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A 3D non-contact real-time multi sensor fringe measurement system is proposed in this research. The system is designed to help radiotherapists detect human body measurements and motions during the cancer radiotherapy treatment process in real-time. The ability to detect body movements will help radiotherapists to accurately estimate the actual radiation dose that was delivered to the tumour volume. The researchers at JMU built a three-sensor system that covers 3600 around the object so that the system can have full visibility around the human body under treatment. Each sensor consists of one c

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Venable, Donald T. "Implementation of a 3D Imaging Sensor Aided Inertial Measurement Unit Navigation System." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1218764810.

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Lilley, Francis. "An optical 3D body surface measurement system to improve radiotherapy treatment of cancer." Thesis, Liverpool John Moores University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313092.

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Al, Sa'd Mohammad Saleh. "A real-time multi-sensor 3D surface shape measurement system using fringe analysis." Thesis, Liverpool John Moores University, 2011. http://researchonline.ljmu.ac.uk/6011/.

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This thesis presents a state-of-the-art multi-sensor, 3D surface shape measurement system that is based upon fringe projection/analysis and which operates at speeds approaching real-time. The research programme was carried out as part of MEGURATH (www.megurath.org), a collaborative research project with the aim of improving the treatment of cancer by radiotherapy. The aim of this research programme was to develop a real-time, multi-sensor 3D surface shape measurement system that is based on fringe analysis, which provides the flexibility to choose from amongst several different fringe profilom

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Calmer, Radiance. "3D wind vectors measurement with remotely piloted aircraft system for aerosol-cloud interaction study." Phd thesis, Toulouse, INPT, 2018. http://oatao.univ-toulouse.fr/20750/1/CALMER_Radiance.pdf.

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The European project BACCHUS (impact of Biogenic versus Anthropogenic emissions on Clouds and Climate: towards a Holistic UnderStanding) focuses on aerosol-cloud interactions. Vertical wind velocities near cloud base, and cloud condensation nuclei (CCN) spectra, are the two most important input parameters for aerosol-cloud parcel models in determining cloud microphysical and optical properties. Therefore, the present study focuses on the instrumental development for vertical wind measurements to improve aerosol-cloud closure studies. Enhancements in Remotely Piloted Aircraft Systems (RPAS) hav

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Inman, Samuel Walker. "Integration of real time oxygen measurements with a 3D perfused tissue culture system." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/67586.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 115-117).<br>In vitro models that capture the complexity of human tissue and organ behaviors in a scalable and easy-to- use format are of increasing interest for both technological applications in drug development and in basic biology research. Tissues and organs are perfused continuously with blood, which delivers nutrients, oxygen, and macromolecular regulatory molecules. In vitro culture models that incorporate loc

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Ghose, Abhijit. "Pulsed measurement based nonlinear characterization of avalanche photodiode for the time error correction of 3D pulsed laser radar." Kassel Kassel Univ. Press, 2005. http://deposit.ddb.de/cgi-bin/dokserv?id=2709432&prov=M&dok_var=1&dok_ext=htm.

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Fourie, Sarie Marissa. "3D measurement of cervical and thoracic postural dynamism in sitting : a pilot study." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85712.

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Thesis (MScPhysio)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: The aim of this study was to improve the measurement of postural dynamism in the sitting position using a three-dimensional (3D) motion analysis system. The primary objective was to describe pilot data for postural dynamism of the cervical and thoracic spines while working at a desktop computer. The secondary objective was to refine the process of posture measurement and analysis by decreasing data processing time. Certain factors in 3D motion analysis can lead to an increase in gaps in data collected during trial capture,

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Spours, J. "The use of a structured laser light system to ascertain three dimensional measurements of underwater work sites." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341127.

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Chiu, Chuang-Yuan. "Rapid three-dimensional photonic scanning system for body volume measurement and body shape visualization." Thesis, University of Edinburgh, 2016. http://hdl.handle.net/1842/22003.

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Traditional three-dimensional (3D) photonic scanning (3DPS) can be used to obtain body volume data and to enable visualization of 3D body shape in one rapid scan, which is helpful for determining people’s obesity level, health risk and sport performance as well as motivating individuals to reduce weight efficiently. Nevertheless, traditional 3DPS is restricted to expensive and fixed hardware and specific software that requires specialist interpretation in laboratory settings, which reduces possible applications. Therefore, the purpose of this research was to develop a fast, inexpensive, portab

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Langston, Paul Wesley. "Implementation and evaluation of a two-dimensional laser doppler vibrometer system for non-contact monitoring of external stress loading of aluminum samples." Thesis, Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/33808.

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This thesis details the development and validation of a laser Doppler vibrometer-based measurement system that is capable of quantifying not only the normal vibration of a solid body but also the component of vibration that is parallel to the plane containing the surface of interest. LDV manufacturers produce various devices that capture 3D measurements in a beam configuration that can be used to decompose the measured signals into not only the normal velocity of the surface of an object but also two orthogonal in-plane components of the vibration. It was a slightly simplified two-dimensional

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Zervas, Michael Jay. "Development of a High Speed, Robust System for Full Field-of-View 3D Shape Measurements." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/984.

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"3D shape measurements are critical in a range of fields, from manufacturing for quality measurements to art conservation for the everlasting archival of ancient sculptures. The most important factor is to gather quantitative 3D information from measurement devices. Currently, there are limitations of existing systems. Many of the techniques are contact methods, proving to be time consuming and invasive to materials. While non-contact methods provide opportunities, many of the current systems are limited in versatility. This project focuses on the development of a fringe projection based sy

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Vorasayan, Pongpan. "Spatially resolved measurement of thin film silicon solar modules by laser beam induced current (LBIC) system." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6652.

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This thesis presents the development of innovative tools to investigate spatially distributed properties of thin film photovoltaic devices. They are required to gain a better understanding of device behaviour driven by how such properties affect the performance of commercial-scale devices. The tools developed for this are a distributed 3D model (D3DM) as simulation software and a laser beam induced current (LBIC) system as a platform for characterisation. The D3DM was developed utilising standard circuit analysis software. It is constructed to simulate realistic device structures and current f

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Brandejsky, Vaclav. "MR scanner independent 3D B1 field mapping of magnetic resonance spectroscopy RF coils using an automated measurement system." Thesis, Linköpings universitet, Institutionen för medicinsk teknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15025.

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We developed a method for measurement of the B1+/- fields as an alternative approach to B1+/- fields assessment in MR scanner. Our setup incorporates an industrial coordinate table controlled by a PC-based program, search coils, a two--port vector network analyzer and an analog-to-digital (A/D) card. It is possible to measure in various liquid media (for example in saline solution) to mimic different shapes and dielectric properties of the human body.<br>Radiofrekventa - spolars känslighetsmönster är viktigt för avbildning med magnetkamera (MRI) och magnetresonansspektroskopi (MRS). Vetskap om

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Chou, Tsung-nan. "The integration of an ultrasonic phased array and a vision system for the 3D measurement of multiple targets." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362887.

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Aichler, Jaroslav. "Systém managementu měření." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228717.

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The subject of diploma thesis is analysis of the European Standard EN ISO 10012, which has a status of a Czech Standard (ČSN EN ISO 10012). It’s focused on roughness measurement. The thesis was written in cooperation with a private company called PLASMAMETAL Ltd. situated in Brno. The company offers coating applications for a variety of materials. Important part of the thesis is a measurement management system improvement manual for PLASMAMETAL Ltd. It’s also dealt with the economical aspect of an investement into a new measurement equipment.

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Lu, Weina. "Development of a multi-wavelength lensless digital holography system for 3D deformations and shape measurements of tympanic membranes." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/242.

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Current methodologies for characterization of tympanic membranes (TMs) have some limitations. They: are qualitative rather than quantitative, consist of single point mobility measurements, or only include one-dimensional deformation measurements. Furthermore, none of the current clinical tools for diagnosis of hearing losses have the capability to measure the shape of TM, which is very useful for anatomical or pathological investigations. The multi-wavelength lensless digital holography system (MLDHS) reported in this work consists of laser delivery (LD), optical head (OH), and computing plat

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Ben-Naser, Abdusalam. "Measurement of range of motion of human finger joints, using a computer vision system." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/12531.

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Assessment of finger range of motion (ROM) is often required for monitoring the effectiveness of rehabilitative treatments and for evaluating patients' functional impairment. There are several devices which are used to measure this motion, such as wire tracing, tracing onto paper and mechanical and electronic goniometry. These devices are quite cheap, excluding electronic goniometry; however the drawbacks of these devices are their lack of accuracy and the time- consuming nature of the measurement process. The work described in this thesis considers the design, implementation and validation of

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Chen, Jiandan. "A Multi Sensor System for a Human Activities Space : Aspects of Planning and Quality Measurement." Licentiate thesis, Karlskrona : Department of Signal Processing, School of Engineering, Blekinge Institute of Technology, 2008. http://www.bth.se/fou/Forskinfo.nsf/allfirst2/cb31f327fad9034bc12574c1002f9367?OpenDocument.

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Zucchini, Davide. "Design and realization of an instantaneous concentration measurement system for wind tunnel applications." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23540/.

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The aim of this project work is the design and realization of an instantaneous concentration measurement system to be used with binary gas mixtures. The design is focused on the simplicity of the set up and on its compactness, and it is specifically intended to be used in wind tunnel applications. The outcome of the design process for the specified system is an aspirating hot-wire probe based on a polypropylene 3D printed body and a simple single wire sensor. Specifically, a 3D printing machine based on the Material Jetting (MJ) technology was used for the probe manufacturing. One of the most

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Brandejsky, Vaclav. "MR scanner independent 3D B₁ field mapping of magnetic resonance spectroscopy RF coils using an automated measurement system." Thesis, Linköping University, Department of Biomedical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15025.

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<p>We developed a method for measurement of the B<sub>1</sub><sup>+/-</sup> fields as an alternative approach to B<sub>1</sub><sup>+/-</sup> fields assessment in MR scanner. Our setup incorporates an industrial coordinate table controlled by a PC-based program, search coils, a two--port vector network analyzer and an analog-to-digital (A/D) card. It is possible to measure in various liquid media (for example in saline solution) to mimic different shapes and dielectric properties of the human body.</p><br><p>Radiofrekventa - spolars känslighetsmönster är viktigt för avbildning med magnetkamera

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Chen, Jiandan. "An Intelligent Multi Sensor System for a Human Activities Space---Aspects of Quality Measurement and Sensor Arrangement." Doctoral thesis, Karlskrona : Blekinge Institute of Technology, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00487.

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In our society with its aging population, the design and implementation of a highperformance distributed multi-sensor and information system for autonomous physical services become more and more important. In line with this, this thesis proposes an Intelligent Multi-Sensor System, IMSS, that surveys a human activities space to detect and identify a target for a specific service. The subject of this thesis covers three main aspects related to the set-up of an IMSS: an improved depth measurement and reconstruction method and its related uncertainty, a surveillance and tracking algorithm and fina

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Van, der Westhuizen Gareth. "Design, implementation & analysis of a low-cost, portable, medical measurement system through computer vision." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6764.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: The In the Physiotherapy Division of the Faculty of Health Sciences on the Tygerberg Hospital Campus of the University of Stellenbosch, the challenge arose to develop a portable, affordable and yet accurate 3D measurement machine for the assessment of posture in school children in their classroom environment. Currently Division already uses a state-of-the-art VICON commercial medical measuring machine to measure human posture in 3D in their physiotherapy clinic, but the system

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Ouckama, Ryan. "Comparison of flexible electrogoniometers to a 3D optical tracking system for measurements of ankle angles during level walking and running." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18818.

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Accurate measurement of joint motion is highly desirable for human gait analysis. Marker based optical motion capture is currently a gold standard in human gait studies but limited to a small field of view, exclusively in a laboratory setting. Where quantitative assessment is needed in the unconstrained environments (eg. factory floor, clinical wards), strain-gauge electrogoniometers provide portable operation and simple measurement of joint angles. These modern electrogoniometers have overcome problems associated with prior generations of fixed axis goniometers. The purpose of this study was

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Neumann, Hendrikje Marie [Verfasser]. "Prototyping of a Surface-integrated Mechano-optical Microsensor System for 3D Traction Force Measurements by DHM/DIC / Hendrikje Marie Neumann." Kiel : Universitätsbibliothek Kiel, 2019. http://d-nb.info/1197612440/34.

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Patel, Jalpa A. "Commissioning and Implementation of an EPID Based IMRT QA System “Dosimetry Check” for 3D Absolute Dose Measurements and Quantitative Comparisons to MapCheck." University of Toledo Health Science Campus / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=mco1288918801.

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Pan, Mingming. "Terahertz wave-guided reflectometry system." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0062.

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Ce travail vise à construire un système compact et facile à mettre en œuvre de réflectométrie guidée par ondes térahertz (TGR) en tirant parti de l'émetteur-récepteur térahertz et des guides d'ondes pour diverses applications. Par rapport aux systèmes conventionnels utilisant une méthode quasi-optique, le nouveau concept a une configuration beaucoup plus simple et permet des applications de sondage à distance.Après des études sur le développement de la technologie térahertz, un émetteur-récepteur à double ACP à pompage optique et deux émetteurs-récepteurs radar à ondes continues modulées en fr

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Dutta, Somen [Verfasser], Klaus [Akademischer Betreuer] Drechsler, Klaus [Gutachter] Drechsler, and Michael [Gutachter] Kupke. "Defect evaluation with superimposed 3D thermo-tomography model : Automated 3D model generation and defect localisation of thermography measurement results on large components utilising an industrial robot and a laser system / Somen Dutta ; Gutachter: Klaus Drechsler, Michael Kupke ; Betreuer: Klaus Drechsler." München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/1220319767/34.

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Macknojia, Rizwan. "Design and Calibration of a Network of RGB-D Sensors for Robotic Applications over Large Workspaces." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/23976.

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This thesis presents an approach for configuring and calibrating a network of RGB-D sensors used to guide a robotic arm to interact with objects that get rapidly modeled in 3D. The system is based on Microsoft Kinect sensors for 3D data acquisition. The work presented here also details an analysis and experimental study of the Kinect’s depth sensor capabilities and performance. The study comprises examination of the resolution, quantization error, and random distribution of depth data. In addition, the effects of color and reflectance characteristics of an object are also analyzed. The study e

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Trella, Fredrik, and Nils Paakkonen. "Development of a Cost-Effective, Reliable and Versatile Monitoring System for Solar Power Installations in Developing Countries : A Minor Field Study as a Master Thesis of the Master Programme in Engineering Physics, Electrical Engineering." Thesis, Uppsala universitet, Fasta tillståndets elektronik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-302815.

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This report is the result of a conducted Minor Field Study (MFS), to the greatestextent funded by the Swedish International Development Cooperation Agency(SIDA), in an attempt to design a system for evaluating smaller solar power systems indeveloping countries. The study was to the greater part conducted in Nairobi, Kenyain close collaboration with the University of Nairobi. The aim was to develop asystem that would use easily available components and keep the costs to a minimum,yet deliver adequate performance. The system would measure certain parameters of asolar power system and also releva

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Lai, Jian-Zhi, and 賴建志. "The Study of 3D Trajectory Measurement Systems Based on Magnetic Feedback Signals." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/53875862666065944144.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>95<br>The application of the magnetic field signals has received much academic attention lately, namely because of the characteristic of non-line-of-sight. Relevant research on magnetic field signals can be verified through trajectory measurement's feasibility. Excessive error has become the obstacle needing to be overcome with this technology. This research applies servo control technology to magnetic field trajectory measurement. Firstly, the characteristic that the intensity of a magnetic field exhibits was analyzed. Using a 3D hall-effect probe, which measures

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(6587408), Yatong An. "Multi-Scale, Multi-Modal, High-Speed 3D Shape Measurement." Thesis, 2019.

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<div>With robots expanding their applications in more and more scenarios, practical problems from different scenarios are challenging current 3D measurement techniques. For instance, infrastructure inspection robots need large-scale and high-spatial-resolution 3D data for crack and defect detection, medical robots need 3D data well registered with temperature information, and warehouse robots need multi-resolution 3D shape measurement to adapt to different tasks. In the past decades, a lot of progress has been made in improving the performance of 3D shape measurement methods. Yet, measurement

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(11205843), Ahmed Mohammed Al Otaibi. "Polymer Nanocomposite-Based Wide Band Strain Sensor for 3D Force Measurement Using Piezoelectric and Piezoresistive Data Fusion." Thesis, 2021.

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<div>Polymer nanocomposites (PNC) have an excellent potential for in-situ strain sensing applications in static and dynamic loading scenarios. These PNCs have a polymer matrix of polyvinylidene fluoride (PVDF) with a conductive filler of multi-walled carbon nanotubes (MWCNT) and have both piezoelectric and piezoresistive characteristics. Generally, this composite would accurately measure either low-frequency dynamic strain using piezoresistive characteristic or high-frequency dynamic strains using piezoelectric characteristics of the MWCNT/PVDF film sensor. Thus, the frequency bands of the str

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(8781872), Yaan Zhang. "Improvement of Structured Light Systems Using Computer Vision Techniques." Thesis, 2020.

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<div> <div> <div> <p>In this thesis work, we propose computer vision techniques for 3D reconstruction and object height measurement using a single camera and multi-laser emitters, which have an intersection on the projected image plane. Time-division and color division methods are first investigated for our structured light system. Although the color division method offers better accuracy for object height measurement, it requires the laser emitters equipped with different color lights. Furthermore, the color division method is sensitive to light exposure in the measurement environment. Next,

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Su, Zhi-Ping, and 蘇治平. "3D Image for Optical Measurement System." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/07438875657971240900.

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碩士<br>國立中正大學<br>機械工程所<br>94<br>This paper proposes to develop a fast optical measurement system for measuring large objects. This system, which is composed of a charge coupled device and a digital light process at calibration plane, can transform object measurement into digital, which can be used for further implication. The rationale of this system is based on the mapping function to transform two-dimensional image into three-dimensional image, in order to obtain a higher experimental result. The experiment uses gauss filter and normalized image to increase the quality of image and avoid ot

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