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Dissertations / Theses on the topic 'Conditioned sensor'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Liu, Peng. "Joint Estimation and Calibration for Motion Sensor." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-286839.

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In the thesis, a calibration method for positions of each accelerometer in an Inertial Sensor Array (IMU) sensor array is designed and implemented. In order to model the motion of the sensor array in the real world, we build up a state space model. Based on the model we use, the problem is to estimate the parameters within the state space model. In this thesis, this problem is solved using Maximum Likelihood (ML) framework and two methods are implemented and analyzed. One is based on Expectation Maximization (EM) and the other is to optimize the cost function directly using Gradient Descent (G

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2

Martín, del Campo Barraza Sergio. "Towards autonomous condition monitoring sensor systems." Licentiate thesis, Luleå tekniska universitet, EISLAB, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25706.

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Rolling element bearings are used to carry load and reduce friction between moving parts in rotating machines, which play a central role in society and industry, for example in the transportation and energy sectors. It is essential to monitor and maintain the condition of bearings such that machines can operate efficiently and any failures resulting in unplanned stoppages are avoided. Therefore, bearings with embedded sensing capabilities are becoming increasingly common, which makes it possible to consider bearings to be sensor systems that can monitor the condition of rotating machines. Howe

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3

Dandino, Charles M. "Condition Monitoring Sensor for Reinforced Elastomeric Materials." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1352485050.

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4

Tavassoli, Teresa. "Sensory perception in autism spectrum conditions." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610035.

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5

Billington, Scott Alexander. "Sensor and machine condition effects in roller bearing diagnostics." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/17796.

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6

Unger, Thomas. "Intelligent multi-sensor nodes for application in condition monitoring." Thesis, Southampton Solent University, 2000. http://ssudl.solent.ac.uk/1210/.

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This thesis describes how system parameters in a manufacturing environment can be used to make judgements about the condition of the monitored machines. The two main areas of research described are firstly how the machine parameters are measured and processes and can then be used as variables to assess the condition of the machines. Secondly how to present this imformation to the machine operators and engineers who maintain these machines, in order to help them make decisions about the state of health of the equipment they are responsible for. The research is concerned with an investigation in

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7

Cheung, Chun Kau. "Small Wind Turbine Blade Sensor for Condition Based Maintenance." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/628.

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Wind Energy is a fast growing industry. However, wind turbines are expensive to build, so they need proper maintenance to prolong service life. Since blades are the most important components in the wind turbine, this project prototyped a low cost sensing system to monitor blades' health. The sensor board uses Atmel microcontrollers to monitor the blade's vibration frequency by sampling a data set of 128 acceleration measurements. An integer version of Fast Fourier Transform is used to process those data. The result is then sent via radio wirelessly to a receiver for future processing. Through

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8

Hörschmeyer, Felix. "Development of a wireless sensor system for the characterization of energy harvesting conditions." Thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-28887.

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This report deals with the development of a wireless sensor system that measures the environmental energy and predicts if energy harvesting could be possible in different areas. It provides an overview over the hardware used to build this system and gives a detailed description of the software implementation of the system. The hardware part presents the microcontroller and platform that is used, as well as the sensors integrated in the system. The software part explains how the used hardware was put together in a program that controls the different components. It explains the possibility to sa

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9

Bogias, Alexander. "A wireless 802.11 condition monitoring sensor for electrical substation environments." Thesis, Cardiff University, 2012. http://orca.cf.ac.uk/38202/.

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The work reported in this thesis is concerned with the design, development and testing of a wireless 802.11 condition monitoring sensor for an electrical substation environments. The work includes a comprehensive literature review and the design and development of a novel continuous wireless data acquisition sensor. Laboratory and field tests were performed to evaluate the data acquisition performance of the developed wireless sensor. The sensor‟s wireless immunity to interference performance was also evaluated in laboratory and field tests. The literature survey reviews current condition moni

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10

Philipp, François. "Runtime Hardware Reconfiguration in Wireless Sensor Networks for Condition Monitoring." Phd thesis, Universitäts- und Landesbibliothek Darmstadt, 2014. https://tuprints.ulb.tu-darmstadt.de/4159/7/diss.pdf.

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The integration of miniaturized heterogeneous electronic components has enabled the deployment of tiny sensing platforms empowered by wireless connectivity known as wireless sensor networks. Thanks to an optimized duty-cycled activity, the energy consumption of these battery-powered devices can be reduced to a level where several years of operation is possible. However, the processing capability of currently available wireless sensor nodes does not scale well with the observation of phenomena requiring a high sampling resolution. The large amount of data generated by the sensors cannot be ha

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11

Hoseini, Seied Zaniar Hoseini. "MULTI-CHANNEL EEG SENSOR FRONTEND FOR PORTABLEHEALTH CONDITION MONITORING APPLICATIONS." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1533124706225894.

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12

Kan, Man Shan. "Multi-sensor condition monitoring of bearings using support vector machines." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/110621/1/Man%20Shan_Kan_Thesis.pdf.

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This thesis presents a study on bearing condition monitoring under variable operating conditions using Support Vector Machines. Data collected from multiple sensors including accelerometers, acoustic emission sensors and tachometers are used for the studies presented in this thesis. This work has successfully demonstrated acoustic emission's superiority in bearing incipient fault detection; and the prognostic study has developed an effective prognostic approach to capture the system's dynamics with speed variations and make accurate predictions.

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13

Grix, Nicola. "Conditional immortalisation of mouse auditory sensory epithelial cells." Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.414134.

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Sullivan, Kathleen Margaret. "The Experience of Senior Housing for Lesbian, Gay, Bisexual and Transgender Seniors: An Exploratory Study." PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/146.

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By the year 2030, 20% of the U.S. population will be 65 years of age or older. An increase in the demand for supportive health and social services is expected with the aging of the population. Demand for senior housing is expected to grow, too. This study explores what the social environment offers to lesbian, gay, bisexual and transgender (LGBT) seniors who relocated to LGBT retirement communities. Previous research asked LGBT seniors who did not live in LGBT senior housing about their housing preferences. The present study, for the first time, asked residents of existing LGBT senior living c

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15

Al-Habaibeh, Amin. "Rapid design of condition monitoring systems for machining operations." Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326780.

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16

Hamid, Hiwa F. "Bridge Condition Assessment Using Dynamic Response Collected Through Wireless Sensor Networks." Youngstown State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1391776500.

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17

Durazo, Romero Emmanuel Santiago. "A methodology for tracking the scapulaunder dynamic conditions." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/a-methodology-for-tracking-the-scapulaunder-dynamic-conditions(3c8e71ee-f4c8-4971-9a57-4c633662227c).html.

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In the diagnosis and analysis of shoulder instability a precise determination of the location and orientation of the Glenohumeral joint is important. A better understanding of shoulder kinematics and kinetics will help clinicians and therapists in the diagnosis and treatment of shoulder pathologies. To-date, non-invasive skin-based methods are often either restricted to quasi-static measurements or are inaccurate during dynamic assessments at high humeral elevations as a result of soft skin artefact. Tracking the orientation of the scapula is difficult because it is surrounded by soft tissues,

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18

Gurung, Sanjaya. "Efficient Solar Energy Harvesting and Management for Wireless Sensor Networks under Varying Solar Irradiance Conditions." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1703345/.

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Although wireless sensor networks have been successfully used for environmental monitoring, one of the major challenges that this technology has been facing is supplying continuous and reliable electrical power during long-term field deployment. Batteries require repetitive visits to the deployment site to replace them once discharged; admittedly, they can be recharged from solar panels, but this only works in open areas where solar radiation is unrestricted. This dissertation introduces a novel approach to design and implement a reliable efficient solar energy harvester to continuously, and a

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19

Repo, Jari. "Condition monitoring of machine tools and machining processes using internal sensor signals." Licentiate thesis, KTH, Machine and Process Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12872.

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<p>Condition monitoring of critical machine tool components and machining processes is a key factor to increase the availability of the machine tool and achieving a more robust machining process. Failures in the machining process and machine tool components may also have negative effects on the final produced part. Instabilities in machining processes also shortens the life time of the cutting edges and machine tool.</p><p>The condition monitoring system may utilise information from several sources to facilitate the detection of instabilities in the machining process. To avoid additional compl

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20

Liu, Hongyuan. "Embedded test and condition monitoring technology for cell-based bio-sensor systems." Thesis, Lancaster University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.533077.

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21

Hartig, Jakob, Christian Schänzle, and Peter F. Pelz. "Validation of a soft sensor network for condition monitoring in hydraulic systems." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71201.

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With increasing digitization, models are more important than ever. Especially their use as soft sensors during operation offers opportunities in cost saving, easy data acquisition and therefore additional functionality of systems. In soft sensor networks there is redundant data acquisition and consequently the occurrence of inconsistent values from different soft sensors is encouraged. The resolution of these data-induced conflicts allows for the detection of changing components characteristics. Hence soft sensor networks can be used to detect wear in system components. In this paper this appr

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22

Wennerström, Hjalmar. "A Node-Link Perspective on the Impact of Local Conditions in Sensor Networks." Doctoral thesis, Uppsala universitet, Avdelningen för datorteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-300168.

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Sensor networks are made up of small battery-powered sensing devices with wireless communication capabilities, enabling the network to monitor the environment in which it is deployed. Through their flexible and cable-free design these networks open up for new deployment scenarios that were previously not plausible such as during a natural disaster. Motivated by scenarios where centralized oversight is not possible the focus of this thesis is to equip nodes with further adaptability to changes in the links it has with other nodes. This is achieved through contributions in three areas focusing o

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23

Boutwell, Ryan. "The Impact of Growth Conditions on Cubic ZnMgO Ultraviolet Sensors." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5908.

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Cubic Zn1-xMgxO (c-Zn1-xMgxO) thin films have opened the deep ultraviolet (DUV) spectrum to exploration by oxide optoelectronic devices. These extraordinary films are readily wet-etch-able, have inversion symmetric lattices, and are made of common and safe constituents. They also host a number of new exciting experimental and theoretical challenges. Here, the relation between growth conditions of the c-Zn1-xMgxO film and performance of fabricated ultraviolet (UV) sensors is investigated. Plasma-Enhanced Molecular Beam Epitaxy was used to grow Zn1-xMgxO thin films and formation conditions

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24

Chalyy, D., and I. Zhidenko. "Fiber-optical temperature sensors for operation in radiation-hazard conditions." Thesis, XII Міжнародна науково-практична конференція молодих вчених, курсантів та студентів «Проблеми та перспективи розвитку системи безпеки життєдіяльності». – Л., 2017. – С.29, 2017. http://hdl.handle.net/123456789/3978.

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Shumway, Marilyn M. "Sensory and Functional Properties of Wheat Stored Under Home Conditions." DigitalCommons@USU, 1993. https://digitalcommons.usu.edu/etd/5404.

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Samples of wheat that had been stored in homes up to 48 years were collected with information about age and storage conditions. Germination, weight per bushel, protein, moisture, grade, and aroma were investigated. Volumes of gluten balls and bread made from ground whole wheat samples were measured. Sensory attributes of bread were evaluated by Quantitative Descriptive Analysis (QDA) for eight flavor and seven texture characteristics. Because of the tremendous variation in samples, generalizations on cause and effect are difficult to make. No one criterion was a perfect indicator of quality. A

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26

Jonsson, Patrik. "Surface Status Classification, Utilizing Image Sensor Technology and Computer Models." Doctoral thesis, Mittuniversitetet, Avdelningen för elektronikkonstruktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-24828.

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There is a great need to develop systems that can continuously provide correct information about road surface status depending on the prevailing weather conditions. This will minimize accidents and optimize transportation. In this thesis different methods for the determination of the road surface status have been studied and analyzed, and suggestions of new technology are proposed. Information about the road surface status is obtained traditionally from various sensors mounted directly in the road surface. This information must then be analyzed to create automated warning systems for road user

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27

Lu, Bin. "Energy Usage Evaluation and Condition Monitoring for Electric Machines using Wireless Sensor Networks." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14152.

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Energy usage evaluation and condition monitoring for electric machines are important in industry for overall energy savings. Traditionally these functions are realized only for large motors in wired systems formed by communication cables and various types of sensors. The unique characteristics of the wireless sensor networks (WSN) make them the ideal wireless structure for low-cost energy management in industrial plants. This work focuses on developing nonintrusive motor-efficiency-estimation methods, which are essential in the wireless motor-energy-management systems in a WSN architecture t

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28

Rajan, Krithika. "Analysis of pavement condition data employing Principal Component Analysis and sensor fusion techniques." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/873.

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Shakmak, B. H. "Condition monitoring of water leakage detection in buried pipes using sensor fusion systems." Thesis, Nottingham Trent University, 2016. http://irep.ntu.ac.uk/id/eprint/31336/.

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Water is significantly lost within water networks in most countries with an estimates of 30% would be lost due to leaks in water pipelines. Water leaks are one of the major factors facing the world, from waste water for no appropriate reason other than a lack of sustainable management programmes. This research work will investigates several sensor techniques and image/signal processing methods to detect water leaks within buried pipeline system. A sensor fusion method for the detection of water leakage in pipes, which consists of two or more sensory systems, is proposed in this research work.

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Torres, Perez Angel. "Tribological assessment of oil condition sensors for marine launching equipment." Thesis, Bournemouth University, 2011. http://eprints.bournemouth.ac.uk/18993/.

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Problems in hydraulic systems associated with hydraulic fluids are an important area of research. Time has proven that contamination control in hydraulic and lubricating systems are fundamental to reliability and performance. Contamination control is needed to guarantee the quality of the oil and machine reliability. Among the several condition monitoring techniques, oil and wear analysis are the most effective for contamination control in hydraulic equipment. An emerging maintenance philosophy is oil condition based maintenance, in which the active monitoring of oil parameters determines the

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Naito, J., Z. Y. Tan, M. Shikida, M. Hirota, and K. Sato. "Characteristics of On-Wall In-Tube Flexible Thermal Flow Sensor at Wrap Pipe Condition." IEEE, 2007. http://hdl.handle.net/2237/9560.

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Adeyemi, Gbenga Joshua. "Development of an external ultrasonic sensor technique to measure interface conditions in metal rolling." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/19393/.

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Metal rolling is by friction which develops at metal-to-roll interfaces during the rolling process. But, friction at the metal-to-roll interface during the metal rolling process can cause roll surface damage if not controlled. Over time, friction results in downtime and repair of the mill. Therefore, lubrication is essential to control the metal-to-roll interface coefficient of friction. It is important to understand the conditions at the metal-to-roll interface to minimize energy loss and improve the strip surface finish. In this work, a new method for measurement of metal-to-roll interface c

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33

Tsivgoulis, Georgios. "Source localization in wireless sensor networks with randomly distributed elements under multipath propagation conditions." Thesis, Monterey, Calif. : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/March/09Mar%5FTsivgoulis.pdf.

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Thesis (Electrical Engineer and M.S. in Electrical Engineering)--Naval Postgraduate School, March 2009.<br>Thesis Advisor(s): Tummala, Murali ; McEachen, John C. "March 2009." Description based on title screen as viewed on April 23, 2009. Author(s) subject terms: Wireless Sensor Network, Direction of Arrival, DOA, Random Arrays, Smart Antennas, Time Difference of Arrival, TDOA, Multipath Propagation, Source Localization. Includes bibliographical references (p. 89-92). Also available in print.

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Iwema, Joost. "Opportunities and limitations of the cosmic-ray neutron soil moisture sensor under humid conditions." Thesis, University of Bristol, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738236.

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35

Panzardi, Enza. "Measurement systems for industrial plants condition monitoring." Doctoral thesis, Università di Siena, 2019. http://hdl.handle.net/11365/1072401.

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Negli ultimi decenni, il mercato mondiale dell’energia ha dovuto far fronte ad una richiesta di produzione sempre crescente e ad un costante mutamento del settore industriale, sempre più attento all’impatto ambientale e all’innovazione tecnologica. Oltre agli impianti per la produzione di energia da fonti rinnovabili, quelli a ciclo combinato o a cogenerazione basati su turbine a gas sono i più diffusi, in quanto garantiscono maggiore rendimento e minori emissioni, a parità di energia prodotta rispetto agli altri impianti a combustione disponibili nel settore. Inoltre, offrono una maggiore

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Baker, Peter C. "Enhancing substation condition monitoring through integrated diagnostics, wireless sensor networks and multi-agent systems." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=14373.

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37

Ayandokun, O. K. "The incremental motion encoder : a sensor for the integrated condition monitoring of rotating machinery." Thesis, Nottingham Trent University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245075.

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38

Pandolfi, Sara. "Studio dell’invecchiamento dei sensori di Beam Condition Monitoring System dell’esperimento ALICE." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21884/.

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Questa tesi si propone di studiare l’invecchiamento dei sensori che compongono il Beam Condition Monitor System (BCM), il sistema di protezione di ALICE da eventuali problematiche legate al fascio di particelle, come i beam failures o beam losses. ALICE (A Large Ion Collider Experiment) è uno dei grandi esperimenti presenti ad LHC (Large Hadron Collider) presso il CERN di Ginevra, dedicato allo studio delle proprietà dello stato della materia chiamato Quark Gluon Plasma (QGP). Per riuscire in questo studio, ALICE si serve di una grande quantità di dati raccolti durante collisioni tra ioni pesa

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Landi, Elia. "ENHANCING THE RELIABILITY OF TURBOMACHINE CONDITION MONITORING EXPLOITING UNCONVENTIONAL RUGGED SENSORS." Doctoral thesis, Università di Siena, 2021. http://hdl.handle.net/11365/1143865.

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This work is focused on increasing the reliability of measurement systems for turbomachine condition monitoring. The motivation stems from the fact that the sensing systems that are widely used today to determine the behavior and health status of turbomachinery use advanced methods such as digital twins. A digital twin is a software representation of a physical device which relies on the data coming from the onboard sensors and can be used to increase the reliability of the device and to perform predictive maintenance to reduce the risk of costly failures. In this framework, the sensors

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Haan, Benjamin J. "Decomposing Bayesian network representations of distributed sensor interpretation problems using weighted average conditional mutual information /." Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1421626381&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Tompkins, Nicholas William. "Design of a Machine Condition Monitoring System with Bluetooth Low Energy." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc984239/.

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Aliwan, Mustafa. "Exploration of a condition monitoring system for rolling bearing based on a wireless sensor network." Thesis, University of Huddersfield, 2016. http://eprints.hud.ac.uk/id/eprint/29080/.

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In recent years, wireless sensor networks (WSN) have attracted attention in machine condition monitoring (CM) fields for a more efficient system based on the inherent advantages of WSN, including ease of installation and relocation, lower maintenance cost and the ability to be installed in places not easily accessible. As critical components of rotating machines, bearings account for more than 40% of the various types of failures, causing considerable unpredicted breakdowns of a plant. Thus, this thesis intends to develop a cost-effective and reliable wireless measurement system for rolling be

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Bian, Linkan. "Stochastic modeling and prognostic analysis of complex systems using condition-based real-time sensor signals." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/51753.

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This dissertation presents a stochastic framework for modeling the degradation processes of components in complex engineering systems using sensor based signals. Chapters 1 and 2 discuses the challenges and the existing literature in monitoring and predicting the performance of complex engineering systems. Chapter 3 presents the degradation model with the absorbing failure threshold for a single unit and the RLD estimation using the first-passage-time approach. Subsequently, we develop the estimate of the RLD using the first-passage-time approach for two cases: information prior distributions

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Al-Azmi, Abdulrahman F. "The design of an effective sensor fusion model for condition monitoring systems of turning processes." Thesis, Nottingham Trent University, 2008. http://irep.ntu.ac.uk/id/eprint/319/.

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High energy price and the increasing requirements of quality and low cost of products have created an urgent need to implement new technologies in current automated manufacturing environments. Condition monitoring systems of manufacturing processes have been recognised in recent years as one of the essential technologies that provide the competitive advantage in many manufacturing environments. This research aims to develop an effective sensor fusion model for turning processes for the detection of tool wear. Multi-sensors combined with a novelty detection algorithm and Learning Vector Quantis

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Auerswald, Christian. "Mikromechanischer Körperschall-Sensor zur Strukturüberwachung." Doctoral thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-205864.

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Strukturüberwachung und Condition Monitoring spielen in vielen Gebieten der Technik eine große Rolle. Zur Überwachung von Leichtbaustrukturen aus faserverstärkten Kunststoffen bietet sich hierfür besonders die Körperschall-Analyse an. Am Markt etabliert sind hierfür piezoelektrische Signalaufnehmer. Diese Arbeit stellt eine kostengünstige Alternative in Form von mikromechanischen Körperschall-Sensoren vor. Eine Besonderheit stellt hierbei das Prinzip des mechanischen Bandpasses dar. Es wird die Elektronik- und Gehäuseentwicklung sowie die experimentelle Untersuchung dargelegt<br>Structural hea

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Ohka, Masahiro, Yasunaga Mitsuya, Yasuaki Matsunaga, and Shuichi Takeuchi. "Sensing characteristics of an optical three-axis tactile sensor under combined loading." Cambridge University Press, 2004. http://hdl.handle.net/2237/10276.

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Cui, Xinjie. "Injurious crash risk and medical condition and medication use among senior drivers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ60285.pdf.

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Ou, Qing. "Vibration-based Energy Harvesting for Wireless Sensors used in Machine Condition Monitoring." Thesis, University of Canterbury. Mechanical Engineering, 2012. http://hdl.handle.net/10092/7234.

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In a wide range of industries, machine condition monitoring is one of the most cost effective ways to minimise maintenance efforts and machine downtime. To implement such a system, wireless solutions have increasingly become an attractive proposition due to the ease of installation and minimal infrastructure alternation. However, currently most wireless sensors in the world are powered by a finite battery source. The dependence of batteries not only requires frequent maintenance, but also has adverse environmental consequences associated with battery disposal. These reasons render massive depl

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Yeo, Graeme James. "Monitoring railway track condition using inertial sensors on an in-service vehicle." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7531/.

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Effective maintenance of railway track is critical for the safe operation of any railway network. Efficient maintenance may also result in economic benefits for rail operators. The work in this thesis looks into how an inexpensive measurement system could be fitted to in-service railway vehicles such as commuter trains, to provide a relatively high frequency of measurement on their routes of operation, when compared to dedicated measurement vehicles. This thesis describes how a prototype inertial measurement system was designed and built, and fitted to a commuter train operating in the region

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Valleron, Arthur. "Etude et optimisation de capteurs de gaz a base de dioxyde d’etain en conditions d’une ligne d’echappement automobile." Thesis, Saint-Etienne, EMSE, 2011. http://www.theses.fr/2011EMSE0613/document.

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Abstract:

Cette étude est dédiée à l’optimisation de capteurs chimiques de gaz de type résistifs à base de dioxyde d’étain (SnO2) pour l’application en ligne d’échappement automobile. Les capteurs sont élaborés par la technique de sérigraphie qui permet la production en masse de capteurs robustes sur substrat alumine. En vue de l’application automobile visée, les capteurs ont été optimisés par l’ajout d’une couche protectrice poreuse déposée sur l’élément sensible de SnO2. Le comportement de ces capteurs a été étudié en fonction de différents paramètres, comme la température et la vitesse des gaz, repré

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