Browsing by Subject "Piezoelectricitat"
Now showing items 1-20 of 52
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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 characterization of immersion ultrasonic transducers for pulsed regime applications
(2019)
Article
Open AccessUltrasonic transducer design is focused to maximize performance in specific applications, usually leading to a complex design and expensive construction and assembly. With the aim to overcome ... -
Design and construction of a prototype of an ultrasonic applicator for ultrasonic soldering, cutting and drilling
(Universitat Politècnica de Catalunya, 2019-06)
Master thesis
Open Access
Covenantee: České vysoké učení technické v PrazeThis project proposes a design of an ultrasonic generator oriented to industrial applications like ultrasonic soldering, cutting and drilling. For this, it has been developed a first design of the system using some recent ... -
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 ... -
Design and implementation of a data acquisition and transmission system based on configurable hardware
(Universitat Politècnica de Catalunya, 2018-10)
Master thesis
Restricted access - author's decisionThe aim of this project is to find a practical solution for high speed data transfers rate systems. The goal of the project is to design and develop a functional prototype able to acquire data from an analogue source and ... -
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 ... -
Dielectric and piezoelectric nonlinear properties of slightly textured lead barium niobate ceramics
(American Institute of Physics (AIP), 2019-01-09)
Article
Restricted access - publisher's policyDielectric and piezoelectric responses of slightly textured, lead barium niobate ceramics are studied. The designed morphotropic phase boundary composition (Pb0.63Ba0.37Nb2O6) shows considerable nonlinear dielectric and ... -
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
Open AccessA 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 ...
