Tesis sobre el tema "COTS and low-cost sensor"
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Roussel, Stephane M. "Sensor Integration for Low-Cost Crash Avoidance". DigitalCommons@CalPoly, 2009. https://digitalcommons.calpoly.edu/theses/184.
Texto completoJacobs, M. J. "A low cost, high precision star sensor". Thesis, Stellenbosch : University of Stellenbosch, 1995. http://hdl.handle.net/10019.1/4659.
Texto completo189 leaves single sided printed, preliminary pages and numbered pages 1-126. Includes bibliography, list of appendixes, figures, notation and symbols. Digitized at 300 dpi (OCR), using a Bizhub 250 Scanner.
ENGLISH ABSTRACT: The Sunsat microsatellite is being developed at the University of Stellenbosch. It is equipped with a high resolution earth imager which requires a sophisticated attitude determination and control system. Precise control of the satellite is impossible without high precision attitude sensors. The most accurate attitude sensor presently used by satellites is the star sensor. The aim 'of this thesis is to develop a low cost, high precision star sensor for the Sunsat microsatellite. The development included the selection of electronic and optical hardware followed by the design, construction and testing of the sensor. Software algorithms were developed and programmed to control the imager, extract stars from images and match the observed constellations to a star catalogue. A set of matching observed and reference vectors are passed to the attitude determination and control system which calculates the three axis orientation of the satellite.
AFRIKAANSE OPSOMMING: Die Sunsat mikrosatelliet word tans by die Universiteit van Stellenbosch ontwikkel. Dit is toegerus met 'n hoeresolusie aardwaarnemingskamera en vereis 'n gevorderde orientasiebepaling-en beheerstelsel. Presiese beheer is onmoontlik sonder akkurate sensore. 'n Stersensor is die mees akkurate tipe sensor waarmee satelliete tans toegerus word. Die doelwit van hierdie tesis is die ontwikkeling van 'n hoe resolusie, laekoste stersensor vir die Sunsat mikrosatelliet. Die ontwikkeling behels die seleksie van elektroniese en optiese apparatuur wat gevolg is deur die ontwerp, opbou en toets van die sensor. Programmatuur algoritrnes is ontwerp om die kamera te beheer, sterre in fotos te herken en waargenome konstellasies in die sterkatalogus te vind. 'n Stel waargenome en verwysingsvektore stel die orientasiebepaling-en beheerstelsel in staat om die orientasie van die satelliet te bereken.
Abbas, Syed Farhat. "Development of a low cost shock pressure sensor". Ohio : Ohio University, 1988. http://www.ohiolink.edu/etd/view.cgi?ohiou1182538469.
Texto completoRockey, Chad A. "Low-cost Sensor Package for Smart Wheelchair Obstacle Avoidance". Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1327595053.
Texto completoYap, Teddy. "Mobile robot navigation with low-cost sensors". Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://proquest.umi.com/pqdweb?index=0&did=1957353711&SrchMode=2&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1268419222&clientId=48051.
Texto completoIncludes abstract. Title from first page of PDF file (viewed March 12, 2010). Available via ProQuest Digital Dissertations. Includes bibliographical references (p. 138-144). Also issued in print.
Reed, Ahren Alexander. "Detecting Suspicious Behavior With Low-cost Sensors". DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/655.
Texto completoWoo, Heechul. "The selective low cost gas sensor based on functionalized graphene". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX050/document.
Texto completoRecent advances in nanomaterials provided a strong potential to create a gas sensor with many advantages such as high sensitivity of single molecule detection, low cost, and low power consumption. Graphene, isolated in 2004, is one of the best promising candidate for the future development of nanosensors applications because of its atom-thick, two-dimensional structures, high conductivity, and large specific surface areas. Every atom of a monolayer graphene can be considered as a surface atom, capable of interacting even with a single molecule of the target gas or vapor species, which eventually results in the ultrasensitive sensor response.In this thesis work, graphene films were synthesized by Chemical Vapor Deposition (CVD) on the glass substrate. Raman spectroscopy was used to analyze the quality and number of layers of graphene. Atomic Force Microscope (AFM) and Scanning Electron Microscopy (SEM) were also performed to analyze the quality of graphene. After the characterization of graphene films, graphene based resistive devices (four identical electrodes are thermally evaporated directly onto the graphene film as metal electrodes) were fabricated. The electrical characterization has been carried out using Keithley-4200.Intrinsic device response was studied with different external condition changes (pressure, humidity, light illumination). The device was non-covalently functionalized with organometallic complex (Ru(II) trisbipyridine) and the its light exposure response was studied. The observed device response was reproducible and similar after many cycles of on and off operations. The theoretical and experimental approaches and the results obtained during the thesis are opening up a way to understand and fabricate future gas sensing devices based on the non-covalentely functionalized graphene
Bouffard, Joshua Lee. "An Alternative Sensor Fusion Method For Object Orientation Using Low-Cost Mems Inertial Sensors". ScholarWorks @ UVM, 2016. https://scholarworks.uvm.edu/graddis/537.
Texto completoTozzi, Michael Jay. "Development and implementation of low cost mobile sensor platforms within a wireless sensor network". Thesis, Monterey, California. Naval Postgraduate School, 2010. http://hdl.handle.net/10945/5232.
Texto completoSensor networks are used throughout the government and industry for a wide variety of purposes. Mobile Sensor Platforms (MSPs), from surface combatant vessels to unmanned aerial vehicles, have been integrated into these sensor networks since their inception. Unmanned MSPs currently used in sensor networks have two major drawbacks: They are extremely expensive and they require the control of a human operator. Remote controlled unmanned systems currently do not eliminate risk to personnel entirely, because they are typically too expensive to be considered expendable. If these standard unmanned systems are downed in a hostile environment, their recovery is often attempted by personnel on the ground; thus, still risking human lives. The military is exploring the use of low-cost unmanned MSPs to eliminate the need to risk personnel in their recovery. One of the greatest expenses in the life cycle of any system is operator cost. To reduce or eliminate operator cost, a platform must be autonomous. Though algorithms exist for adding autonomous capabilities to a mobile platform, such algorithms are typically designed for robust systems with a great deal of processing power. Low-cost systems are typically limited in capability by a low-processing power CPU. For this reason, small footprint alternatives to existing autonomous control algorithms must be developed to truly implement a low-cost MSP. This thesis applies the systems engineering process to developing a generic system solution for the need of a low-cost MSP, with concept of operations, external systems diagram, generic requirements, functional architecture and decompositions developed. The proposed generic system solution is then further designed in a scoped environment and implemented as a proof of concept prototype.
Alzebda, Said Anwar. "Low-cost oscillating sensor for ultrasonic testing and monitoring of liquids". Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546599.
Texto completoJones, Samuel M. "Evaluation of a low-cost aerosol sensor to assess occupational exposures". Thesis, University of Iowa, 2015. https://ir.uiowa.edu/etd/1858.
Texto completoYoo, Jin Jung D. "Performance evaluation of a low cost processor with wireless connectivity". Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4269.
Texto completoThe entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (July 17, 2006) Includes bibliographical references.
Manso, Marco António Azinheira Morais Lourenço. "Design and prototyping of a network-enabled low-cost low-power seismic sensor monitoring system". Doctoral thesis, Universidade de Évora, 2021. http://hdl.handle.net/10174/30827.
Texto completoLe, Xuan-Chien. "Improving performance of non-intrusive load monitoring with low-cost sensor networks". Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S019/document.
Texto completoIn smart homes, human intervention in the energy system needs to be eliminated as much as possible and an energy management system is required to automatically fluctuate the power consumption of the electrical devices. To design such system, a load monitoring system is necessary to be deployed in two ways: intrusive or non-intrusive. The intrusive approach requires a high deployment cost and too much technical intervention in the power supply. Therefore, the Non-Intrusive Load Monitoring (NILM) approach, in which the operation of a device can be detected based on the features extracted from the aggregate power consumption, is more promising. The difficulty of any NILM algorithm is the ambiguity among the devices with the same power characteristics. To overcome this challenge, in this thesis, we propose to use an external information to improve the performance of the existing NILM algorithms. The first proposed additional features relate to the previous state of each device such as state transition probability or the Hamming distance between the current state and the previous state. They are used to select the most suitable set of operating devices among all possible combinations when solving the l1-norm minimization problem of NILM by a brute force algorithm. Besides, we also propose to use another external feature that is the operating probability of each device provided by an additional Wireless Sensor Network (WSN). Different from the intrusive load monitoring, in this so-called SmartSense system, only a subset of all devices is monitored by the sensors, which makes the system quite less intrusive. Two approaches are applied in the SmartSense system. The first approach applies an edge detector to detect the step-changes on the power signal and then compare with the existing library to identify the corresponding devices. Meanwhile, the second approach tries to solve the l1-norm minimization problem in NILM with a compositional Pareto-algebraic heuristic and dynamic programming algorithms. The simulation results show that the performance of the proposed algorithms is significantly improved with the operating probability of the monitored devices provided by the WSN. Because only part of the devices are monitored, the selected ones must satisfy some criteria including high using rate and more confusions on the selected patterns with the others
Torres, John C. "Geomagnetic Compensation for Low-Cost Crash Avoidance Project". DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/492.
Texto completoGarrido, Joana Rodrigues. "TURF: a low cost solution for tracking firemen in urban fires". Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14663.
Texto completoWhen in critical emergency scenarios, first responders are submitted to highly stressful and risky situations. In order to help them dealing with these conditions, the VitalResponder project started and is now capable of continuously monitor the vital signs of firemen with wearable technologies. This provides to the chief of operations the capability to evaluate the health conditions of his firefighters and react according to their needs. The localization of firemen is an important factor when dealing with urban fires. Due to low visibility and difficult communication conditions, is essential for each fireman to be aware of his colleagues’ whereabouts for organization and, in case of need, rescue matters. The idea behind this dissertation is to build a simple and low cost tracking system, embedded in the VitalResponder wearable technology, which can give information about the presence of a fireman or a wall and its distance. The simplest answer found to this problem was sensor fusion using an infrared sensor, to distinguish a wall from a fireman, and an ultrasound sensor, to provide the distance to the obstacle/colleague.
Em cenários críticos de emergência, as equipas de resposta são submetidas a situações de stress e risco extremamente elevados. Para os ajudar a reagir, deu-se início ao projeto VitalResponder que é atualmente capaz de monitorizar continuamente os sinais vitais dos bombeiros devido à tecnologia embutida nos seus fatos. Este sistema fornece ao comandante de operações a capacidade de avaliar as condições de saúde dos seus bombeiros e agir de acordo com as suas necessidades. A localização de bombeiros é um fator muito importante em situações de incêndios urbanos. Devido às fracas condições de visibilidade e comunicação, é essencial que cada bombeiro tenha noção da posição dos seus colegas por questões de organização e salvamento. O objetivo desta dissertação é construir um sistema simples e de baixo custo, que será incorporado no projeto VitalResponder, e fornecerá informações acerca da presença de um bombeiro ou uma parede e a sua respetiva distância. A solução mais simples para este problema é utilizar fusão sensorial de um sensor infravermelho, para distinguir uma parede de um bombeiro, e um sensor de ultrassom, para medir a distância ao obstáculo/colega.
Zhao, Yueming. "Key Technologies in Low-cost Integrated Vehicle Navigation Systems". Doctoral thesis, KTH, Geodesi och geoinformatik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-131420.
Texto completoQC 20131016
Wei, Danming. "Low-Cost Quartz Crystal Microbalance System Platform Designed for Chemical Nanoparticle". TopSCHOLAR®, 2016. http://digitalcommons.wku.edu/theses/1635.
Texto completoDuran, Joshua. "Silicon-Based Infrared Photodetectors for Low-Cost Imaging Applications". University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton155653478017603.
Texto completoRivest, Christopher W. (Christopher Warren). "Design and characterization of a low cost dual differential proving ring force sensor utilizing Hall-effect sensors". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36709.
Texto completoIncludes bibliographical references (leaf 31).
A novel dual differential hall-effect based proving ring force sensor has been designed, manufactured, and tested. Strain gauge based force sensors are among the most common methods of measuring static and dynamic forces, yet they suffer from a wide array of negative attributes including: high cost due to signal amplification instrumentation, high temperature sensitivity, and only moderate dynamic range. The goal of the research herein described was to design and test a low cost, high dynamic range force sensor. Hall-Effect sensors have high bandwidth (>100 kHz), a wide dynamic range, are low in cost (<0.5$), and are ideally suited to dynamic and static force measurements. Proving rings - diametrally loaded hoops of metal, have long been used to measure force yet suffer many setbacks due to their historical designs utilizing mechanical and strain gauge methods of strain detection. A novel nested proving ring flexure has been combined with hall-effect sensors to fulfill the design requirements of a low cost and robust force sensor. Initial data demonstrates that the nested proving ring force sensor herein described is capable of resolving forces of in the range of 0 to 30 Newtons with an accuracy of 0.235 Newtons, all at a potential mass-manufactured cost of U.S. $10.00 per unit.
by Christopher W. Rivest.
S.B.
Gull, Christopher Johannes. "A novel low- cost chlorophyll fluorescence Sensor for early detection of environmental pollution". Universidade Federal de Viçosa, 2017. http://www.locus.ufv.br/handle/123456789/18061.
Texto completoMade available in DSpace on 2018-03-05T16:25:15Z (GMT). No. of bitstreams: 1 texto completo.pdf: 2167804 bytes, checksum: 99c7a466176efa00e621c1cfb6c02980 (MD5) Previous issue date: 2017-07-03
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
A poluição afeta seriamente todos os organismos vivos, assim como economias que dependem, diretamente ou indiretamente, de recursos naturais. O monitoramento ambiental de estresses das plantas, causadas pelos poluentes, é necessário para antecipar e evitar os efeitos negativos antes que se manifestem como danos visíveis. A ausência de monitoramento constante das plantas resulta em diminuição do crescimento das culturas, danos aos ecossistemas, problemas de saúde, e, no fim das contas, perdas econômicas. Especialmente ao redor das áreas afetadas, como, por exemplo, depósitos de resíduos, mineradoras e indústrias, mas também dentro e ao redor das áreas urbanas, é importante reconhecer os problemas potenciais do meio ambiente que possam surgir por causa das atividades humanas. Entre as consequências estão chuva ácida, contaminação de metais pesados, ozônio superficial, modificações de temperatura, e seca, causando alterações na fisiologia vegetal, especificamente na eficiência fotossintética e conteúdo de clorofila. A medição da eficiência fotossintética das plantas, i.e. vitalidade, usando fluorômetros comerciais tais como aparelhos PAM (modulação de amplitude de pulso), torna-se um desafio, uma vez que custo, complexidade e os métodos de medição tornam difíceis o monitoramento em tempo real. Apesar dos aparelhos possuírem alta precisão, podem meramente fornecer uma medição “instantânea” de áreas pequenas. Assim, torna-se difícil o entendimento da vitalidade e eficiência das plantas em grandes áreas e períodos longos, resultando, muitas vezes, que ações sejam tomadas apenas após mudanças significativas nas plantas e na produtividade. Uma solução para o produtor em áreas impactadas por poluentes poderia ser a obtenção de vários desses aparelhos e empregar trabalhadores dedicados exclusivamente para o monitoramento de saúde das plantas, mas isto é caro e ineficiente. Outra solução seria simplificar os equipamentos de medição, e usar vários deles. De fato, neste trabalho nós nos concentramos na resolução deste problema, reduzindo o custo e a complexidade, e eliminando a necessidade de intervenção humana no processo de medição. Propõe-se um sistema de sensores de fluorescência de clorofila de baixo custo que pode monitorar, simultaneamente e sem fios, várias plantas individuais. Estes sensores foram desenvolvidos, prototipados e construídos do zero para dar precisão razoável, com a capacidade de diferenciar entre plantas submetidas à estresse e sem estresse. Nos casos em que o sistema, o Sensor CFY (rendimento fluorescência da clorofila), não possua alta precisão, o sistema compensa em várias medições simultâneas de uma rede de sensores. Isto é, o protótipo do sensor é, inerentemente, desenvolvido para ser usado em redes sem fio (WSN). Usando duas espécies de plantas, Clusia hilariana e Paspalum densum, foi construído, testado e verificado as nossas metodologias e o nosso protótipo através de uma série de experimentos. Baseado nisso, foram observado resultados significativos quando utilizamos o sensor em uma rede de sensores emulado, usando um sensor único em várias plantas durante um longo período de tempo. Foi possível a discriminação entre plantas nos grupos de estresse e as do controle, assim como a descoberta rápida bem antes de danos se manifestarem nas folhas. Concluímos que é, de fato, possível a detecção da estresse nas plantas utilizando métodos de baixo custo, assim como fazê-lo automaticamente e em tempo real, permitindo a detecção precoce de poluição e fornecendo, por exemplo, tempo suficiente para um produtor resolver os problemas antes de eles se tornarem irreversíveis e dispendiosos.
Pollution seriously affects all living organisms as well as economies directly or indirectly relying on natural growth resources. Monitoring the environment for stresses in plants, caused by pollutants, is necessary in order to anticipate and counteract the adverse effects before they manifest as visible damage. Failure to constantly monitor plants results in decreased crop growth, damage to ecosystems, health-related issues, and, ultimately, economic losses. Especially around affected areas, such as waste deposits, mining activities and factories, but also in and around urban areas, it is important to acknowledge the potential environmental issues that may arise from human activities. Among the consequences we find acid rain, heavy metal contamination, surface ozone, changes in temperature, and drought, contributing to alterations in plant physiology, specifically chlorophyll content and photosynthetic efficiency. Measuring plant efficiency, thus health, using commercial fluorometers, such as PAM (pulse-amplitude modulation) devices, presents a challenge, since cost, complexity and the measurement methods make real-time monitoring a difficult proposition. Although such devices are high-precision instruments, they are merely able to provide ‘snapshots’ of small areas. This makes it difficult to understand the health of plants over large areas and over extended periods of time, frequently resulting in actions taken only after significant changes to plants and productivity. One solution would be for a farmer in an area impacted by pollution to acquire multiple of these devices and to employ a workforce dedicated solely to monitoring plant health, but this is costly and inefficient. Another solution would be to simplify the devices with which to measure, and use a multitude of these. Indeed, in this work, we focus on solving this problem, by reducing costs and complexity, and eliminating the need for human input in the measurement process. We propose a system of low-cost chlorophyll fluorescence sensors able to monitor a large number of individual plants at the same time and wirelessly. These sensors have been designed, prototyped and built from the ground up to provide reasonable accuracy, and capacity for discriminating between plants subjected to stress from non-stressed plants. Where our sensor system, the CFY (chlorophyll fluorescence yield) Sensor, lacks in accuracy, it compensates with a multitude of potential simultaneous measurements from an array of sensors within a network. For this reason, the sensor prototype is inherently designed for wireless sensor networks (WSN). Using two species of plants, Clusia hilariana and Paspalum densum, we have built, tested and verified our methodologies and prototype sensors through a series of experiments. Through these, we observed significant results when employed in an emulated sensor network using one sensor on a large number of plants over extended periods of time. Differentiating the stressed group from the control group was possible, in addition to rapid and well before any visible damage had manifested on leaves. We conclude that it is indeed possible to not only detect plant stress using low-cost methods, but also to do so automatically and in real-time, allowing for early-detection of pollution and providing e.g. a farmer enough time to resolve problems before they become irreversible and costly.
GRASSO, NIVES. "Visibility analyses using 3D urban models generated by low-cost multi-sensor approaches". Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2705900.
Texto completoOzyalcin, Anil E. "SOLITONS: A COMPACT, LOW-COST, AND WIRELESS BODY MOTION CAPTURE SYSTEM". The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1437440750.
Texto completoEydgahi, Hoda. "Design and evaluation of iCalm : a novel, wrist-worn, low-power, low-cost, wireless physiological sensor module". Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44690.
Texto completoIncludes bibliographical references (p. 151-156).
The impracticality of the ambulatory electrocardiogram for long-term physiological monitoring has lead to the development of many new, compact sensors that have been designed with form factor and user comfort in mind. Nevertheless, there currently is no single sensor module that would be ideal to use for continuous, long-term monitoring. The sensors tend to either lack wireless capabilities, have a short battery life, or are financially unfeasible. After conducting a quick survey of recently developed sensors, we propose the design of iCalm: a novel, wrist-worn, low-power, low-cost, and wireless physiological sensor module. Its performance is compared against an FDA-approved platform through numerous experiments, including a few user studies. The iCalm skin conductance sensor greatly reduced noise due to motion and pressure artifacts; the iCalm heart rate sensor performed similar to the FDA-approved sensor. In addition, all of the participants in the experiments preferred the iCalm to the FDA-approved comparison sensors we tested. With iCalm, we hope to enable comfortable, long-term monitoring of the autonomic nervous system physiology and improve upon the current commercial sensors on the market.
by Hoda Eydgahi.
S.M.
TEPPATI, LOSE' LORENZO. "Geomatics support to the metric documentation of the archaeological heritage. Tests and validations on the use of low-cost, rapid, image-based sensors and systems". Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2735515.
Texto completoAquilanti, Claudia. "Sensor Fusion of GPS and speed information for low-cost automotive positioning and navigation". Thesis, KTH, Signalbehandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-53767.
Texto completoPuehn, Christian G. "Development of a Low-Cost Social Robot for Personalized Human-Robot Interaction". Case Western Reserve University School of Graduate Studies / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=case1427889195.
Texto completoKuhn, Tara. "Application of low-cost sensing technologies towards advancement in atmospheric science and citizen engagement". Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/208420/1/Tara_Kuhn_Thesis.pdf.
Texto completoGrobler, Andries Johannes. "A low cost eddy current displacement sensor for active magnetic bearings / by Andries J. Grobler". Thesis, North-West University, 2008. http://hdl.handle.net/10394/2627.
Texto completoThe McTronX research group of the North-West University is involved in active magnetic bearing (AMB) research. An AMB is a mechatronic system that levitates a rotating axis with electromagnetic forces. The group has successfully implemented radial and axial AMBs as well as a complete flywheel energy storage system operating at 22 000 rpm. Research is also done on using the actuator voltage and current to derive rotor position, also known as self-sensing, but these methods have not been perfected. Position measurement is very important in AMBs, since it is the main control variable. The literature indicates that the eddy current phenomenon is well suited for displacement measurement, since it is relatively noise immune and insensitive to process medium when a nonmagnetic and non-conductive substance is used. Printed circuit board (PCB) sensors must be considered when low cost is a requirement. The goal of this project is to design, simulate, manufacture and test a PCB based, low cost eddy current is placement sensor for AMBs. This project will focus on the sensor (probe) that converts the physical rotor movement to an electric signal. An evaluation platform, used to test the PCB sensor, is also designed and manufactured as part of this project. The first step in the sensor design is to establish a suitable software model. A finite element method (FEM) software package, Comsol, is used to realise a FEM model of the sensor. This FEM model is used to simulate sensor behaviour in various configurations. The trends found in the FEM model results are used to compile a design flow diagram. This diagram is illustrated by applying it to single, double- and five-layer designs. The single- and double-layer sensors are manufactured and tested to validate the accuracy of the FEM model and design flow diagram. Close correlation between the practical and predicted results is found for the single- and double layer sensors. The sensitivity and working point rms voltage correlated exceptionally well for both sensors. Linearity does not correlate as closely due to the evaluation platform and circuitry but is still within acceptable limits when compared to other displacement sensors used in AMBs. This project laid the foundation for PCB sensor design in the McTronX group. A comparison between the different sensors showed that the double-layer sensor is the best choice in terms of cost and performance. It is concluded that the PCB displacement sensor presented in this dissertation is a viable low cost option for displacement measurement in AMBs.
Thesis (M.Ing. (Electrical Engineering)--North-West University, Potchefstroom Campus, 2008.
Smithers, Breana Gray. "Evaluating the Pulse Sensor as a Low-Cost and Portable Measurement of Blood Pulse Waveform". Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc849682/.
Texto completoLiu, Xiaoting. "Developing a scientific basis for utilisation of low-cost sensing technologies towards quantitative assessments of air pollution and its sources". Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/212115/1/Xiaoting_Liu_Thesis.pdf.
Texto completoRida, Amin H. "Conductive inkjet printed antennas on flexible low-cost paper-based substrates for RFID and WSN applications". Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28083.
Texto completoCommittee Chair: Dr. Manos Tentzeris; Committee Member: Dr. Gregory Durgin; Committee Member: Dr. Joy Laskar.
Li, Chen. "A simple and low cost anti-lock braking system control method using in-wheel force sensor and wheel angular speed sensor". Thesis, Coventry University, 2017. http://curve.coventry.ac.uk/open/items/aebcb301-fec5-4684-945c-020817157509/1.
Texto completoKhosravani, Ali Mohammad [Verfasser] y Dieter [Akademischer Betreuer] Fritsch. "Automatic modeling of building interiors using low-cost sensor systems / Ali Mohammad Khosravani. Betreuer: Dieter Fritsch". Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2016. http://d-nb.info/1088404243/34.
Texto completoRiedesel, Philipp. "Tilt sensing with low-cost inertial measurement units (IMUs) : Sensor calibration, accuracy specifications and application range". Thesis, Högskolan i Gävle, Samhällsbyggnad, GIS, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-22497.
Texto completoWanjau, R. W. "The design and development of an organic comparator for use in low cost smart sensor systems". Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3019225/.
Texto completoFerdoush, Sheikh Mohammad. "A Low-cost Wireless Sensor Network System Using Raspberry Pi and Arduino for Environmental Monitoring Applications". Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc500182/.
Texto completoRamadoss, Lalitha Hung John Y. "Statistical analysis of time delays in USB type sensor interfaces on Windows-based low cost controllers". Auburn, Ala, 2008. http://hdl.handle.net/10415/1450.
Texto completoSadler, Jeffrey Michael. "Hydrologic Data Sharing Using Open Source Software and Low-Cost Electronics". BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/4425.
Texto completoAshraf, Shahrukh. "Development of a Low-Cost Solution for the Navigation of UAVs in GPS-DeniedEnvironment". University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1470181376.
Texto completoTaylor, Michael D. "Calibration and Characterization of Low-Cost Fine Particulate Monitors and their Effect on Individual Empowerment". Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/932.
Texto completoKartmann, Sabrina [Verfasser] y Roland [Akademischer Betreuer] Zengerle. "Normally-closed dispensing valve and in-line pressure and flow sensor fabricated in low-cost polymer technology". Freiburg : Universität, 2021. http://d-nb.info/1237617987/34.
Texto completoKiobia, Denis Olgen. "Design and Development of a Low-cost Acoustic Device to Detect Pest Infestation in Stored Maize". Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/56588.
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Sundblad, Graziella. "Building a low-cost IoT sensor system that recognizes behavioral patterns for collaborative learning - A Proof of Concept". Thesis, Malmö universitet, Institutionen för datavetenskap och medieteknik (DVMT), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-44351.
Texto completoLeccadito, Matthew. "A Kalman Filter Based Attitude Heading Reference System Using a Low Cost Inertial Measurement Unit". VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3189.
Texto completoOzturk, Salih Baris. "Modelling, simulation and analysis of low-cost direct torque control of PMSM using hall-effect sensors". Thesis, Texas A&M University, 2005. http://hdl.handle.net/1969.1/4905.
Texto completoSendra, Compte Sandra. "Deployment of Efficient Wireless Sensor Nodes for Monitoring in Rural, Indoor and Underwater Environments". Doctoral thesis, Editorial Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/32279.
Texto completoThere are many works related to the design and development of sensor nodes which present several applications. Wireless sensor networks can facilitate and improve some aspects of our daily lives. It is easy to think that if this type of device is so beneficial to us and to our environment, its price should be relatively cheap. But we can see that this is not true. Why these devices are so expensive? Would it be possible to develop devices with the same capabilities and lower prices? How can I make my low-cost sensor nodes? This dissertation answers these questions and shows some of the many applications that sensor nodes may have. In this dissertation, we propose (and implement in some cases) the development of sensor nodes for environmental monitoring, from low-cost devices. For the implementation of a sensor node and network which joins all these nodes, it is important to know the environment where they will work. Throughout this dissertation, we present the research carried out for the development of sensors in three main application areas. In the first of these areas, we present multisensor devices developed for environmental monitoring. The application of wireless sensor networks to the environment requires a study of how signals are affected depending on the distance, vegetation, ambient humidity, etc. We focus our developments on the fire detection in rural areas and on the control of pests in vineyards where the early detection of these events generates high economic savings. We also propose the development of a sensor network which will help us to reduce and prevent wolves¿ attacks and theft in livestock. Finally, within this group, we present a network to detect material anomalies in building and a sensor network which allows us to monitor the elderly or disabled people who move along with a group on a tour or activity. The second group of applications is related to the monitoring of spaces in indoor environments. For this, we analyze the behavior of wireless signals in different scenarios. These results allowed us to extract a new method for designing wireless networks in indoor environments. Our method allows defining the best location of network devices and sensor nodes indoors saving 15% of the sensors needed. Finally, we present a study on underwater freshwater communications based on electromagnetic waves, where we analyze the dependency of underwater communications as a function of working frequency, temperature, data transfer rates and modulation. Related to underwater environment, we present two proposals. First one refers to the implementation of a sensor network for marine farms which allows us to reduce the amount of waste deposited on the seabed and reduce the percentage of wasted food. The second proposal is the development of two oceanographic sensors which allow us to control the amount of food and feces deposited in seabed and the water turbidity control in a very simple and inexpensive way. All these developments and proposals have been preceded by a comprehensive study on the energy problems in wireless sensor networks. We have also presented several techniques which can be used to prolong the network lifetime and improve its stability.
Sendra Compte, S. (2013). Deployment of Efficient Wireless Sensor Nodes for Monitoring in Rural, Indoor and Underwater Environments [Tesis doctoral]. Editorial Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/32279
Alfresco
Buaes, Alexandre Greff. "A low cost one-camera optical tracking system for indoor wide-area augmented and virtual reality environments". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2006. http://hdl.handle.net/10183/7138.
Texto completoIn the last years the number of industrial applications for Augmented Reality (AR) and Virtual Reality (VR) environments has significantly increased. Optical tracking systems are an important component of AR/VR environments. In this work, a low cost optical tracking system with adequate attributes for professional use is proposed. The system works in infrared spectral region to reduce optical noise. A highspeed camera, equipped with daylight blocking filter and infrared flash strobes, transfers uncompressed grayscale images to a regular PC, where image pre-processing software and the PTrack tracking algorithm recognize a set of retro-reflective markers and extract its 3D position and orientation. Included in this work is a comprehensive research on image pre-processing and tracking algorithms. A testbed was built to perform accuracy and precision tests. Results show that the system reaches accuracy and precision levels slightly worse than but still comparable to professional systems. Due to its modularity, the system can be expanded by using several one-camera tracking modules linked by a sensor fusion algorithm, in order to obtain a larger working range. A setup with two modules was built and tested, resulting in performance similar to the stand-alone configuration.
Paulsen, Trevor H. "Low Cost/ High Precision Flight Dynamics Estimation Using the Square-Root Unscented Kalman Filter". BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1922.
Texto completoNiazi, Ayda. "Real time measurement of oxygen by integrating a Clark sensor with low cost printed circuit board technology and solid electrolyte membrane". Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6817/.
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