Browsing by Subject "Piezoelectricitat"
Now showing items 1-20 of 41
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Captació d’energia de l’entorn mitjançant elements piezoelèctrics
(Universitat Politècnica de Catalunya, 2008-05-26)
Master thesis (pre-Bologna period)
Open AccessCada vegada més s’utilitzen dispositius petits, portàtils i de baix consum energètic. Per exemple, les xarxes de sensors autònoms. Aquestes actualment s’alimenten amb piles o bateries i, per tant, encara no són totalment ... -
Desenvolupament d'un dispositiu wearable per a mesurar patrons de respiració
(Universitat Politècnica de Catalunya, 2017-01)
Bachelor thesis
Restricted access - confidentiality agreement -
Design and development of an electronic interface circuit for piezoelectric sensors applied to impact detection
(Universitat Politècnica de Catalunya, 2011-02-16)
Master thesis
Open AccessImpact detection is a very important Technology in today’s industry and science. It has many applications, from testing building structures to detecting the coin impact in an automatic distribution machine. The aim of ... -
Developing and testing an amplifier system for piezoelectric sensors
(Universitat Politècnica de Catalunya, 2011-05)
Bachelor thesis
Restricted access - author's decision
Covenantee: Nottingham Trent University. School of Architecture, Design and the Built EnvironmentPiezoelectric sensors are used in condition monitoring system to monitor forces, vibration, strain, acoustic emission and for other applications. The sensors produce a small electric charge which needs to be amplified ... -
Dielectric and mechanical nonlinear behavior of Mn doped PMN-35PT ceramics
(2010-10)
Article
Open AccessThis paper presents an investigation on dielectric and mechanical nonlinear properties in Mn-doped PMN-35PT ceramics. The structural study of the ceramics verifies that the 1% mol Mn doped PMN-35PT is a pure perovskite ... -
Diseño de un sistema electrónico para la realización de estudios biomecánicos de la pisada utilizando plantillas sensoras y su monitorización mediante interfaz Android
(Universitat Politècnica de Catalunya, 2016-02)
Master thesis
Restricted access - author's decisionEn este proyecto se pretende diseñar y construir un sistema electrónico que mediante una plantilla instrumentada y con la ayuda de una interfaz Android sea capaz de realizar un estudio biomecánico de la marcha y que permita ... -
Disseny d'un circuit d'interfície per a un PDO aplicat a dispositius piezoelèctrics
(Universitat Politècnica de Catalunya, 2015-02-06)
Bachelor thesis
Open Access[ANGLÈS] The digital pulsed oscillators are the systems in charge of controlling a ressonator device so we can get a controlled and constant oscillation. As a control system, it is formed by a circuit that detects the ... -
Disseny d'un sistema de control amb FPGA per actuadors piezoelèctrics
(Universitat Politècnica de Catalunya, 2009-10)
Master thesis (pre-Bologna period)
Open AccessEn aquest projecte s’expliquen quines són les propietats de l’efecte piezoelèctric i quines són les seves aplicacions en l’actualitat. Amb aquesta base es parteix a examinar de quines maneres es pot realitzar el control ... -
Distributed piezoelectric sensor system for damage identification in structures subjected to temperature changes
(2017-05-31)
Article
Open AccessStructural health monitoring (SHM) is a very important area in a wide spectrum of fields and engineering applications. With an SHM system, it is possible to reduce the number of non-necessary inspection tasks, the associated ... -
Effect of Mn-acceptor dopant on dielectric and piezoelectric responses of lead lanthanum zirconate titanate piezoceramics
(2011-08-01)
Article
Restricted access - publisher's policyDielectric and direct piezoelectric responses in non-doped and Mn-doped Pb0.91La0.09(Zr0.65,Ti0.35)O3 ceramics are experimentally studied. The permittivity and the direct piezoelectric coefficient were measured by applying ... -
Effects of poling process on KNN-modified piezoceramic properties
(2010-02)
Article
Restricted access - publisher's policyThe influence of the orthorhombic to tetragonal phase transition near room temperature in the poling process of KNN-modified piezoceramics was studied. Poling temperatures of 25° and 120°C were used. The percentage of 90° ... -
Elastic, dielectric and electromechanical properties of (Bi0.5Na0.5)TiO3-BaTiO3 piezoceramics at the morphotropic phase boundary region
(2017-01-05)
Article
Restricted access - publisher's policyA systematic study of the functional properties of the (1-x)(Bi0.5Na0.5)TiO3–xBaTiO3 (BNT-xBT) piezoceramic system for 0.05 = x = 0.07 is performed. The samples are obtained through the conventional solid-state route. The ... -
Electronic wireless drum sticks
(Universitat Politècnica de Catalunya, 2015-07-21)
Bachelor thesis
Open AccessThis thesis wants to develop a prototype of a final commercial product. It tries to take the idea of electronic drums to the next level by creating a drum system packed in just a pair of sticks. Any surface will be an ... -
Enhancement of piezoelectric properties stability of submicron-structured piezoceramics obtained by spark plasma sintering
(Elsevier, 2018-06-19)
Article
Restricted access - publisher's policyGrain-size effect on functional properties of piezoceramics is nowadays an important topic due to the potential applications of these materials at the submicron scale. In this context, we explore the effect of the grain ... -
Estación meteorológica alimentada mediante un sistema piezoeléctrico de recolección de energía
(Universitat Politècnica de Catalunya, 2017)
Master thesis (pre-Bologna period)
Restricted access - author's decisionIn order to provide information on weather conditions on the top of a mountain, both mountaineers and nearby shelter workers, a small weather station has been designed that can be easily installed at the summit to get ... -
Estudi experimental de la captació d'energia a partir de despreniment de vòrtex en aigua mitjançant piezoelèctrics
(Universitat Politècnica de Catalunya, 2012-02-07)
Master thesis (pre-Bologna period)
Restricted access - author's decision
Covenantee: Sarti, Centro Tecnológico de Vilanova i la GeltrúAquest projecte és un estudi sobre l’aprofitament de l’energia del medi ambient i la seva transformació en energia elèctrica. En general, els sistemes d’aquest tipus s’anomenen energy harvesting i s’ha de saber que, alguns ... -
Estudio de generación eléctrica mediante materiales piezoeléctricos y su aplicación al diseño de un sistema electrónico generador incorporado al calzado
(Universitat Politècnica de Catalunya, 2016-05-26)
Master thesis
Restricted access - author's decisionUn grupo de seis personas del Máster de Sistemas Automáticos y Electrónicos presentamos la idea de fabricar un calzado capaz de generar energía y usar esta para enviar información relevante para el usuario. Con esta idea ... -
Estudio de la presión interna en el molde de inyección en la producción de materiales poliméricos microcelulares de etileno-propileno con espumación física
(2014)
Conference report
Open AccessSe efectuó el estudio de la presión en la cavidad de un molde de inyección en dos posiciones diferentes respecto al punto de inyección para evaluar los efectos de los parámetros del proceso y la distancia de dicho punto ... -
Estudi preliminar d’un col·lector d’energia piezoelèctric excitat per forces magnètiques per al medi marí
(Universitat Politècnica de Catalunya, 2016-01)
Bachelor thesis
Open AccessEl projecte realitzat tracta sobre l’estudi i la possibilitat de millora d’un col·lector d’energia piezoelèctric per al medi marí amb l’objectiu d’alimentar dispositius de baix consum. Els estudis efectuats durant el ... -
Extrinsic behaviour of PZT ceramics near the morphotropic phase transition
(2005-09)
Article
Open AccessThe aim of this work is to study the dependence of the linear and non-linear dielectric, piezoelectric and mechanical coefficients on the Ti fraction in PZT ceramic compositions near the morphotropic phase boundary. The ...
