Browsing by Subject "Piezoelectricitat"
Now showing items 1-20 of 68
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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 ... -
Caracterització i implementació de transductors acústics pel seguiment d'espècies marines
(Universitat Politècnica de Catalunya, 2020-11-19)
Bachelor thesis
Open AccessAquest treball estudia les comunicacions subaquàtiques amb l’objectiu de fer un seguiment d’escamarlans dins d’una reserva marina, centrant-se en el sistema de seguiment mitjançant etiquetes acústiques. Primerament s’ha ... -
Caracterización y diseño de sistemas de adquisición y gestión de datos, aplicados a la medición de la actividad sísmica volcánica
(Universitat Politècnica de Catalunya, 2016-04-11)
Doctoral thesis
Open AccessVolcanic eruptions result of the energy stored within the planet are a danger to both populations and to the towns. As inevitable natural events, it is necessary to continue evolving in the study of the physics of the Earth ... -
Desenvolupament d'un dispositiu wearable per a mesurar patrons de respiració
(Universitat Politècnica de Catalunya, 2017-01)
Bachelor thesis
Restricted access - confidentiality agreement -
Desenvolupament de tèxtils amb propietats piezoelèctriques basats en fibres de PVDF
(Universitat Politècnica de Catalunya, 2018-06-08)
Bachelor thesis
Restricted access - author's decisionAquest treball parteix d’un estudi previ sobre la generació d’energia mitjançant nanomembranes de PVDF amb dopants. En el present projecte, s’han estudiat les propietats piezoelèctriques d’aquestes membranes a partir ... -
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 ... -
Design of a power amplifier for capacitive loads
(Universitat Politècnica de Catalunya, 2019-10)
Master thesis
Restricted access - author's decision -
Design, implementation, and validation of a piezoelectric device to study the effects of dynamic mechanical stimulation on cell proliferation, migration and morphology
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-10)
Article
Open AccessCell functions and behavior are regulated not only by soluble (biochemical) signals but also by biophysical and mechanical cues within the cells’ microenvironment. Thanks to the dynamical and complex cell machinery, cells ... -
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
Open AccessDielectric 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° ...
