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Relevant bibliographies by topics / Piezoelectric detection / Dissertations / Theses

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Dissertations / Theses on the topic 'Piezoelectric detection'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Baker, S. J. "Piezoelectric crystal detection of noxious gases." Thesis, University of Hull, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380775.

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2

Tombelli, Sara. "Piezoelectric and optical detection of hybridisation." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341055.

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3

Yegingil, Hakki Orhan Shih Wei-Heng Shih Wan Y. "Breast cancer detection and differentiation using piezoelectric fingers /." Philadelphia, Pa. : Drexel University, 2009. http://hdl.handle.net/1860/2969.

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4

Lai, C. S. "Gas and vapour measurements with piezoelectric crystals." Thesis, Cardiff University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380214.

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5

Han, Yong 1969. "Detection of cracks in aircraft structures using piezoelectric sensors." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98964.

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Structural damage detection at the earliest possible stage is very important in the aerospace industry to prevent major failures. In this work, a potential cost-effective crack detection method using piezoelectric strips bonded on the structure was studied. A crack model was developed and validated. Static, modal and transient dynamic analysises are performed for the case of piezoelectric strips bonded to the structure by using a finite element method to explore the effectiveness of the crack detection method. Panel methods are used for steady flow problems of fixed wings in order to calculate

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6

McGovern, John-Paul Shih Wan Y. Shih Wei-Heng. "Flow-enhanced detection of biological pathogens using piezoelectric microcantilever arrays /." Philadelphia, Pa. : Drexel University, 2008. http://hdl.handle.net/1860/2910.

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7

Habib, Anowarul [Verfasser]. "Ultrasonic characterization and defect detection in piezoelectric materials / Anowarul Habib." Siegen : Universitätsbibliothek der Universität Siegen, 2013. http://d-nb.info/1034425854/34.

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8

Béchet, Antoine. "Ultrasonic detection of debonding within a gradient enhanced piezoelectric actuator (GEPAC)." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/17914.

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9

Farlow, Roger. "Low noise techniques applied to a piezoceramic receiver for gas coupled ultrasonic flaw detection." Thesis, University of Strathclyde, 1998. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=24266.

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Piezoelectric plate transducers are commonly used for the generation and detection of ultrasonic signals and have applications in, for example, non-destructive testing and medical imaging. A rigorous theoretical investigation of thermal noise in plate transducers has been undertaken with the aim of establishing the absolute limits of receiver sensitivity in terms of both Minimum Detectable Power (MDP) and Minimum Detectable Force (MDF). The central feature of the work has been the development of two independent theories which provide identical results. One theory is based on an electrical appr

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10

Butrym, Brad A. "Crack Detection in Aluminum Structures." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/32276.

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Structural health monitoring (SHM) is the process of using measurements of a structureâ s response to known excitations and trying to determine if damage has occurred to the structure. This also fits the description of non-destructive evaluation (NDE). The main difference is that NDE takes place while the structure is out of service and SHM is intended to take place while the structure is in service. As such, SHM provides the opportunity to provide early warning against structural failure. This thesis intends to advance the state of the art in SHM by examining two approaches to SHM: vibrat

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11

Medonza, Dharshan C. "AUTOMATIC DETECTION OF SLEEP AND WAKE STATES IN MICE USING PIEZOELECTRIC SENSORS." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_theses/271.

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Currently technologies such as EEG, EMG and EOG recordings are the established methods used in the analysis of sleep. But if these methods are to be employed to study sleep in rodents, extensive surgery and recovery is involved which can be both time consuming and costly. This thesis presents and analyzes a cost effective, non-invasive, high throughput system for detecting the sleep and wake patterns in mice using a piezoelectric sensor. This sensor was placed at the bottom of the mice cages to monitor the movements of the mice. The thesis work included the development of the instrumentation a

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12

Sinha, Dhiraj. "Radio frequency magnetic field detection using piezoelectric material incorporating a microcantilever amplifier." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611229.

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13

Parhad, Ashutosh. "Energy scavenging using piezoelectric sensors to power in pavement intelligent vehicle detection systems." Thesis, California State University, Long Beach, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1603752.

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<p> Intelligent transportation systems use in-pavement inductive loop sensors to collect real time traffic data. This method is very expensive in terms of installation and maintenance. Our research is focused on developing advanced algorithms capable of generating high amounts of energy that can charge a battery. This electromechanical energy conversion is an optimal way of energy scavenging that makes use of piezoelectric sensors. The power generated is sufficient to run the vehicle detection module that has several sensors embedded together. To achieve these goals, we have developed a simula

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14

Grace, Jennifer L. "The utilization of piezoelectric materials and optical fiber sensors for electric field detection." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-05092009-040704/.

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15

Campbell, Gossett A. Mutharasan Rajakannu. "Detection and quantification of pathogens, proteins, and molecules using piezoelectric-excited millimeter-sized cantilever (PEMC) sensors /." Philadelphia, Pa. : Drexel University, 2006. http://dspace.library.drexel.edu/handle/1860/737.

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16

Kessler, Seth Stovack 1977. "Piezoelectric-based in-situ damage detection of composite materials for structural health monitoring systems." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/16836.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.<br>Includes bibliographical references (p. 151-160).<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cost-effective and reliable damage detection is critical for the utilization of composite materials. This thesis presents the conclusions of an analytical and experimental survey of candidate methods for in-situ damage detection in composite materials. Finite element results are presented for

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17

Miranda, Gustavo Cabral de. "Detection of parasite antigens in Leishmania infantum infected spleen tissues by piezoelectric based immunosensors." reponame:Repositório Institucional da UFBA, 2013. http://www.repositorio.ufba.br/ri/handle/ri/11804.

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Submitted by Hiolanda Rêgo (hiolandar@gmail.com) on 2013-06-10T19:36:18Z No. of bitstreams: 1 Dissertação_ICS_Gustavo Miranda.pdf: 1853807 bytes, checksum: f9a1c2b796442124414bba8e163ac719 (MD5)<br>Made available in DSpace on 2013-06-10T19:36:18Z (GMT). No. of bitstreams: 1 Dissertação_ICS_Gustavo Miranda.pdf: 1853807 bytes, checksum: f9a1c2b796442124414bba8e163ac719 (MD5)<br>Doenças como a leishmaniose é uma importante causa de morbidade e mortalidade no Brasil e seus diagnósticos devem ser melhoradas. A produção de anticorpos monoclonbais anti-L. infantum e acoplamento ao sensor piezoelét

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18

Hida, H., M. Shikida, K. Fukuzawa, et al. "Development of Self-Vibration and -Detection AFM Probe by using Quartz Tuning Fork." IEEE, 2007. http://hdl.handle.net/2237/9564.

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19

Aravind, Manju. "Thermal diffusivity measurement of polymers, metals, superconductors and a semiconductor by combined piezoelectric and pyroelectric detection /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21687572.

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20

Martin, Luke Andrew. "Developing a Self-Powered, Wireless Damage Detection System for Structural Health Monitoring Applications." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/9962.

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The research presented in this manuscript introduces an independent structural health monitoring (SHM) system capable of performing impedance-based testing and detecting shifts in resonant frequencies. This independent structural health monitoring system incorporates a low power wireless transmitter that sends a warning signal when damage is detected in a structure. Two damage detection techniques were implemented on the SHM system and successfully used for evaluating structural damage. The first impedance-based technique is used to detect a gouge introduced to a composite plate. The second te

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21

Castro, Jorge Ricardo Moreira. "Estudo sobre a determinação de benzeno e amônia no ar, utlizando sensor piezelétrico de quartzo." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/59/59138/tde-01092008-151145/.

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Os objetivos deste trabalho foram estudar, desenvolver e avaliar filmes para a captação de vapores de benzeno e amônia, tornando possível a detecção e quantificação destas substâncias no ar atmosférico, utilizando sensores piezelétricos de quartzo. Dispositivos piezelétricos destes cristais são hoje de grande importância em Química Analítica, possuindo inúmeras aplicações (meio gasoso e em solução), uma vez que se encontram muitos trabalhos no campo da eletroanalítica, enzimologia, imunoquímica, análise de alimentos, análises clínicas e em análises ambientais. O princípio do método baseia-se

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22

Rivera, Ivan Fernando. "RF MEMS Resonators for Mass Sensing Applications." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5817.

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Sensing devices developed upon resonant microelectromechanical and nanoelectromechanical (M/NEMS) system technology have become one of the most attractive areas of research over the past decade. These devices make exceptional sensing platforms because of their miniscule dimensions and resonant modes of operation, which are found to be extremely sensitive to added mass. Along their unique sensing attributes, they also offer foundry compatible microfabrication processes, low DC power consumption, and CMOS integration compatibility. In this work, electrostatically and piezoelectrically actuated R

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23

Altinsoy, Sinan. "Zero-Power Fall Detection System for Smart Helmets." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21618/.

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The widespread use of vehicles has led to an increase in traffic accidents. In these accidents, motorcyclists are exposed to more risks because they are more vulnerable than car drivers. With the development of technology, manufacturers have increased their work on vehicle security systems. Advancements in these studies which are being applied in daily life resulted in a reduction of risks in accidents. In this thesis, Zero-Power Fall Detection System is developed for smart helmets, which is a safety system for motorcycles. Since the lifetime of electronic devices has become one of the most im

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24

Menezes, João Paulo Crivellaro de [UNESP]. "Análise teórica e experimental de um método interferométrico de detecção de fase óptica, auto-consistente e com elevada faixa dinâmica, aplicado à caracterização de atuadores piezoelétricos flextensionais." Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/87033.

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Made available in DSpace on 2014-06-11T19:22:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-05-25Bitstream added on 2014-06-13T18:08:24Z : No. of bitstreams: 1 menezes_jpc_me_ilha.pdf: 3284910 bytes, checksum: c8578da11e5d14cfc4d1f4eaaafb100b (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Atuadores piezoelétricos convertem energia elétrica em energia mecânica, sendo amplamente utilizados como transdutores de deslocamento micrométricos ou sub-micrométricos de elevada precisão. Neste trabalho, atuadores piezoelétricos flextensionais (APFs), projetad

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25

Santawitee, Onuma. "Study of piezoelectric devices based on free-standing printed thick-films : application to VOCs detection using micro-cantilevers with mesoporous silicasensitive coating." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0108.

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Ces dernières années, des procédés de sérigraphie associés à la technique de la couche sacrificielle ont été développés pour préparer des microsystèmes piézoélectriques à base de couches épaisses de titanate de zirconate de plomb (PZT PbZrTiO3). Cependant, les choix des matériaux et les conditions de traitement (telles que la composition des encres de sérigraphie, les conditions d'impression et le traitement thermique) pourraient affecter la microstructure et par conséquent les propriétés électromécaniques des transducteurs à couches épaisses imprimés. Avec des films épais de PZT déposés sur u

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26

Freitas, Everaldo Silva de [UNESP]. "Análise experimental de diafragmas piezelétricos comerciais para detecção de dano estrutural baseada na impedância eletromecânica." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/141447.

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Submitted by EVERALDO SILVA DE FREITAS null (everaldo.freitas@gmail.com) on 2016-07-03T18:42:32Z No. of bitstreams: 1 Dissertação_Mestrado_Everaldo_Freitas_2016_final.pdf: 3897384 bytes, checksum: 5c9536e39331c3a9d0ddfa1752cc723a (MD5)<br>Approved for entry into archive by Ana Paula Grisoto (grisotoana@reitoria.unesp.br) on 2016-07-07T16:33:04Z (GMT) No. of bitstreams: 1 freitas_es_me_bauru.pdf: 3897384 bytes, checksum: 5c9536e39331c3a9d0ddfa1752cc723a (MD5)<br>Made available in DSpace on 2016-07-07T16:33:04Z (GMT). No. of bitstreams: 1 freitas_es_me_bauru.pdf: 3897384 bytes, checksum: 5c

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27

Kim, Jina. "Low-Power System Design for Impedance-Based Structural Health Monitoring." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/40400.

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Maintenance of the structural integrity and damage detection are critical for all massive and complicated new and aging structures. A structural health monitoring (SHM) system intends to identify damage on the structure under monitoring, so that necessary action can be taken in advance to avoid catastrophic results. Impedance-based SHM utilizes a piezoelectric ceramic as a collocated actuator and sensor, which measures the electrical impedance of the piezoelectric ceramic over a certain frequency range. The impedance profile of a structure under monitoring is compared against a reference pr

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28

Menezes, João Paulo Crivellaro de. "Análise teórica e experimental de um método interferométrico de detecção de fase óptica, auto-consistente e com elevada faixa dinâmica, aplicado à caracterização de atuadores piezoelétricos flextensionais /." Ilha Solteira : [s.n.], 2009. http://hdl.handle.net/11449/87033.

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Orientador: Cláudio Kitano<br>Banca: Aparecido Augusto de Carvalho<br>Banca: Demartonne Ramos França<br>Resumo: Atuadores piezoelétricos convertem energia elétrica em energia mecânica, sendo amplamente utilizados como transdutores de deslocamento micrométricos ou sub-micrométricos de elevada precisão. Neste trabalho, atuadores piezoelétricos flextensionais (APFs), projetados pelo método de otimização topológica, são caracterizados em termos de linearidade entre a tensão de excitação e o deslocamento gerado, bem como em termos de resposta em frequência, utilizando-se um interferômetro de Michel

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29

Singh, Gurjashan. "Health Monitoring of Round Objects using Multiple Structural Health Monitoring Techniques." FIU Digital Commons, 2010. http://digitalcommons.fiu.edu/etd/330.

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Structural Health Monitoring (SHM) techniques are widely used in a number of Non – destructive Evaluation (NDE) applications. There is a need to develop effective techniques for SHM, so that the safety and integrity of the structures can be improved. Two most widely used SHM methods for plates and rods use either the spectrum of the impedances or monitor the propagation of lamb waves. Piezoelectric wafer – active sensors (PWAS) were used for excitation and sensing. In this study, surface response to excitation (SuRE) and Lamb wave propagation was monitored to estimate the integrity of the roun

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30

Chawich, Juliana. "ZnO/GaAs-based acoustic waves microsensor for the detection of bacteria in complex liquid media." Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCD012/document.

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Cette thèse s’inscrit dans le cadre d’une cotutelle internationale entre l’Université de Bourgogne Franche-Comté en France et l’Université de Sherbrooke au Canada. Elle porte sur le développement d'un biocapteur miniature pour la détection et la quantification de bactéries dans des milieux liquides complexes. La bactérie visée est l’Escherichia coli (E. coli), régulièrement mise en cause dans des épidémies d'infections alimentaires, et parfois meurtrière.La géométrie du biocapteur consiste en une membrane en arséniure de gallium (GaAs) sur laquelle est déposé un film mince piézoélectrique d’ox

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31

Tebaldi, Adriano [UNESP]. "Detecção de falhas estruturais usando sensores e atuadores piezelétricos e algoritmos genéticos." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/90837.

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Made available in DSpace on 2014-06-11T19:24:47Z (GMT). No. of bitstreams: 0 Previous issue date: 2004-03-22Bitstream added on 2014-06-13T18:21:16Z : No. of bitstreams: 1 tebaldi_a_me_ilha.pdf: 2161680 bytes, checksum: 3d261c29fd3aac533dd79cedd2e48b90 (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>A tecnologia de materiais inteligentes se tornou uma área de crescente interesse para o desenvolvimento de estruturas que podem incorporar atuadores e sensores capazes de detectar falhas. Extensivas investigações têm sido focadas na tecnologia que integra materiais inteli

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32

Klásek, Matyáš. "Vývoj nanovláknového PVDF senzoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417719.

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This diploma thesis deals with the feasibility of using PVDF nanofibers as an active sensor layer generating electrical signal. PVDF and related electromechanical effects are described. A research study is conducted regarding existing PVDF nanofiber applications and based on it, an event sensor design utilizing triboelectric effect and electrostatic induction is proposed. The electrical response of the layers is experimentally investigated and a pulse detection algorithm is conceived and implemented. Finally, a way of integrating the sensor into a rail track is proposed.

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33

Mičulka, Martin. "Detekce nápravy v systému vážení za jízdy." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442430.

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This master's thesis deals with the Weight in Motion systems (WIM). The main goal is to create simulation software that detects dual tires assembly with respect to the angle with which the sensor is embedded into the road. Thesis also contains literature search of available solutions of weighing systems and the sensors which are used in these systems. Subsequently, the thesis contains software for recognizing simple assembly or dual tires assembly from real measured data. Software solutions were developed using programming language Python v3.7. All source codes were developed in PyCharm Commun

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34

Capobianco, Joseph A. Shih Wan Y. Shih Wei-Heng. "Piezoelectric microcantilever serum protein detector /." Philadelphia, Pa. : Drexel University, 2009. http://hdl.handle.net/1860/2993.

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Tebaldi, Adriano. "Detecção de falhas estruturais usando sensores e atuadores piezelétricos e algoritmos genéticos /." Ilha Solteira : [s.n.], 2004. http://hdl.handle.net/11449/90837.

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Orientador: Vicente Lopes Júnior<br>Banca: Paulo Carlos Kaminski<br>Banca: Walter Katsumi Sakamoto<br>Resumo: A tecnologia de materiais inteligentes se tornou uma área de crescente interesse para o desenvolvimento de estruturas que podem incorporar atuadores e sensores capazes de detectar falhas. Extensivas investigações têm sido focadas na tecnologia que integra materiais inteligentes no monitoramento das condições de sistemas. Vários estudos têm sido realizados na área de identificação de sistemas mecânicos e há uma tendência de introduzir otimização em projetos de monitoramento de sinais qu

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36

Kharrat, Mohamed. "Design and development of a torsional guided-waves inspection system for the detection and sizing of defects in pipes." Thesis, Ecully, Ecole centrale de Lyon, 2012. http://www.theses.fr/2012ECDL0016/document.

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Plusieurs industries manipulent des substances liquides et gazeuses qui circulent souvent dans de longues canalisations. La technique d'ondes guidées est couramment utilisée dans ce domaine. Cette technique est en progrès continu. Dans cette thèse, un système d'inspection a été conçu et développé. Il est basé sur des transducteurs piézoélectriques qui génèrent des ondes guidées de torsion pouvant se propager le long du tube testé. Les signaux réfléchis des défauts et singularités rencontrés sont détectés aussi par des capteurs piézoélectriques. Des simulations numériques utilisantpar la méthod

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Nguyen, Ba Tong. "Mesures de traces de gaz par spectroscopie d'absorption par diodes lasers accordables. Application à la surveillance de l'environnement." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20201.

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Le besoin d'analyse de gaz à l'état de traces s'est accentué ces dernières années en raison des préoccupations du public et de l'industrie sur des questions telles que le contrôle des émissions de polluants atmosphériques, la surveillance de l'environnement au sens large, la santé et la sécurité au travail. Il est donc nécessaire de posséder des instruments de détection sélectifs, sensibles et capables d'effectuer une mesure directe en temps réel. La fiabilité des systèmes de mesure est également un critère important et, selon l'application envisagée, s'ajoute aussi le besoin de miniaturisatio

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Meesala, Vamsi Chandra. "Modeling and Analysis of a Cantilever Beam Tip Mass System." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/83378.

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We model the nonlinear dynamics of a cantilever beam with tip mass system subjected to different excitation and exploit the nonlinear behavior to perform sensitivity analysis and propose a parameter identification scheme for nonlinear piezoelectric coefficients. First, the distributed parameter governing equations taking into consideration the nonlinear boundary conditions of a cantilever beam with a tip mass subjected to principal parametric excitation are developed using generalized Hamilton's principle. Using a Galerkin's discretization scheme, the discretized equation for the first mode i

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Paget, Christophe. "Active Health Monitoring of Aerospace Composite Structures by Embedded Piezoceramic Transducers." Doctoral thesis, KTH, Aeronautical Engineering, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3277.

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<p>The objectives of the thesis work were to study theinteraction between embedded piezoceramic transducers andcomposite structures as well as determine techniques tosimplify the Lamb waves analysis. Firstly, this studyconsidered the design of the embedded piezoceramic transducers.Secondly, the effect of the embedded transducer on thecomposite strength as well as the influence of the mechanicallyloaded composite on the characteristics of the embeddedtransducer were investigated. Finally, to simplify the analysisof such complex Lamb wave responses, two techniques weredeveloped. They were based

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40

Jonsson, Ulf G. "Detecting Inclusions in a Silicone Rubber Phantom Using Standing Lamb Waves and Multiple Frequency Footprints." Doctoral thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-88220.

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The thesis deals with one major question: is it possible, using one piezoelectric sensor/vibrator, to detect a hard inclusion in a silicone rubber phantom? The question was approached with an open mind and the task was subdivided into three clearly identifiable parts: characterization of the piezoelectric sensor/vibrator (paper I), creating a model of the visco-elastic properties of a tissue-like material (phantom) in contact with the sensor/vibrator (paper II), and to detect the presence of a hard inclusion in the phantom (paper III). All vibrations of the sensor/vibrator and phantom was mode

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黃志偉 and Chi-wai Wong. "Analysis of trace ionic compounds and environmental pollutants in gas and liquid media by (A) Piezoelectric quartz crystal detector and (B)ultramicroelectrode." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31239432.

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42

Wong, Chi-wai. "Analysis of trace ionic compounds and environmental pollutants in gas and liquid media by (A) Piezoelectric quartz crystal detector and (B) ultramicroelectrode /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20577102.

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43

Nguyen, Nhat. "Development and implementation of a DSP based air detector system to prevent embolism during hemodialysis therapy." [Tampa, Fla] : University of South Florida, 2005. http://purl.fcla.edu/usf/dc/et/SFE0001378.

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Scandelari, Luciano. "Génération et détection d'ondes de Lamb à l'aide de P(VF2-VF3) : application à la mesure de densités de liquides." Université Joseph Fourier (Grenoble ; 1971-2015), 1999. http://www.theses.fr/1999GRE10022.

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Au cours de ces travaux, nous avons effectué une étude théorique et expérimentale d'un dispositif à base de P(VF2-VF3) destiné à la génération des ondes de Lamb afin de mesurer des caractéristiques de liquides. L'essentiel de ce travail peut être résumé en trois points : En premier, la présentation d'une structure physique destinée à la génération et à la détection des ondes de Lamb sur des substrats non piézoélectriques, avec pour objectif des applications industrielles, parmi elles la mesure de densité de liquide en continu. Cette structure est constituée de deux lames piézoélectriques ident

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Sharma, Sanjay. "Performance Demonstration of Guided Waves based Structural Health Monitoring system for Aerospace Application." Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPASG073.

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Les ondes élastiques guidées émises et reçues par des transducteurs piézoélectriques minces sont reconnues comme une technologie prometteuse pour plusieurs applications de surveillance de l'état de santé des structures (ou Structural Health Monitoring - SHM), en particulier pour les composants aérospatiaux. La démonstration des performances de ces systèmes, souvent exprimées en termes de courbe de probabilité de détection (POD), est un élément clé du déploiement réussi de cette technologie dans l'industrie. La détermination expérimentale de la courbe POD nécessite de nombreux échantillons inst

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Tondreau, Gilles. "Damage localization in civil engineering structures using dynamic strain measurements." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209466.

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This thesis focuses on the development of a new method for the continuous<p>monitoring of civil engineering structures in order to locate small damages automatically. A<p>review of the very wide literature on Structural Health Monitoring (SHM) points first out that<p>the methods can be grouped in four categories based on their need or not of a numerical model,<p>as well as their need or not of information of the damaged structure to be applied. This state<p>of the art of the SHM methods highlights the requirement to reach each levels of SHM, which<p>is in particular for the localization of sma

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Palmquist, Jonatan. "Structural Health Monitoring of Composite Fan Outlet Guide Vane : Detecting damages and impacts using piezoelectric wafer active sensors and Lamb waves." Thesis, KTH, Lättkonstruktioner, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-203807.

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The use of composite materials within the aerospace industry has increased in the last decades and is still on the rise. Most composite applications are in the aircraft body parts but engine components such as fan blades and fan outlet guide vanes (FOGV) are now also to be found. Metals are well studied and both their fatigue and cracking behavior are well known but for composites this is not the case. Composites also have problems such as micro-cracking, delamination and porosity, which all can be difficult to detect but yet result in significant decreas in load carrying capacity. The ability

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Kerbouai, Hamza. "Modélisation, dimensionnement et optimisation d'un capteur hybride pour la détection des deux roues motorisées dans le trafic routier." Thesis, Belfort-Montbéliard, 2015. http://www.theses.fr/2015BELF0260/document.

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Depuis plusieurs années les chiffres de l'insécurité routière montrent la nécessité de développer un outil technologique qui vise à connaitre le comportement de véhicules deux roues motorisés (2RM) afin d'améliorer leursécurité. De cette problématique découle nos travaux de recherche qui s'inscrivent dans le cadre de projet METRAMOTO (MEsure du TRAfic des deux-roues MOTOrisés pour la sécurité routière et l'évaluation des risques)L’objectif principal visé concerne la modélisation, le dimensionnement et l'optimisation d'un capteur hybride constitué d'une part de boucles électromagnétiques et d'a

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Clément, Pierrick. "Functionalized carbon nanotubes for detecting traces of benzene vapors employing screen-printed resistive and resonant transducers." Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0127/document.

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Ce travail de thèse porte sur l’optimisation des propriétés de nanotubes de carbone pour la détection de gaz.Pour cette application, les nanotubes de carbone ont été déposés sur deux types de transducteur sérigraphiés, résistif et résonant. Les nanotubes de carbone à multi-parois traités par plasma d’oxygène (O-MWCNTs) ont été le point de départ de ces travaux. Les performances de ces nanomatériaux déposés par air-brushing sur le transducteur de type résistif comportant deux électrodes de platine interdigitées préalablement déposées sur un substrat d’alumine ont été étudiées en présence de com

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DeGuilio, Andrew Phillip. "A Comprehensive Experimental Evaluation of Actively Controlled Piezoceramics with Positive Posistion Feedback for Structural Damping." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31679.

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This study evaluates the effectiveness of actively controlled piezoceramics with positive position feedback (PPF) for reducing structural vibrations. A comparison is made between active control with PPF and a parallel resistor-inductor (RLC) shunt technique. The primary objectives of this study are to: 1. Explore the feasibility of using smart materials and fiber optics for simultaneous health monitoring and active damping of a representative aircraft panel. 2. Determine how optical fiber sensors may be used to detect vibration modes of an aircraft panel by investigating their use on a

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