Browsing by Subject "Transductors"
Now showing items 1-20 of 29
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Alimentació adaptativa d'un generador d'ultrasons de potència basada en un convertidor ressonant paral.lel controlat per un DSC
(Universitat Politècnica de Catalunya, 2010-12-15)
Master thesis (pre-Bologna period)
Open AccessCatalà: Disseny i fabricació d'una font d'alimentació per a transductors d'ultrasons de potència. Font d'alimentació formada per un convertidor ressonant DC/AC i controlada per un DSC que corregeix la freqüencia de sortida ... -
Calibration-less direct inductor-to-microcontroller interface
(Institute of Electrical and Electronics Engineers (IEEE), 2022-12-20)
Article
Open AccessA sensor-to-microcontroller interface circuit for inductive sensors that does not require a calibration inductor is presented. Three digital ports of a microcontroller, two transistors, and an embedded timer were used to ... -
Contribución a la mejora de resolución de los sistemas de obtención de imágenes por ultrasonidos
(Universitat Politècnica de Catalunya, 1997-12-15)
Doctoral thesis
Open AccessEl objetivo principal de esta Tesis se centra en la mejora de la resolución axial de los sistemas de ultrasonidos basados en la medida del tiempo de vuelo y/o la recepción de ecos, utilizando soluciones de bajo coste. Se ... -
Desarrollo de un pulser / amplificador para transductores de ultrasonidos
(Universitat Politècnica de Catalunya, 2020-06-29)
Bachelor thesis
Restricted access - confidentiality agreement -
Design of a GUI based on the implemented IEEE1451 Standard in a Wireless Sensor Network
(Universitat Politècnica de Catalunya, 2014-07-24)
Bachelor thesis
Open Access
Covenantee: Technische Universität Berlin[ANGLÈS] Wireless Sensor Networks are widely used in different fields for monitoring and controling purposes. The family of standards IEEE1451 defines a set of communications interfaces between the sensors and the ... -
Design project of a miniature load transducer.
(Universitat Politècnica de Catalunya, 2014-06-26)
Bachelor thesis
Restricted access - author's decisionIn this project the design of a compact load transducer is proposed in order to know the tensile load of wires under their operational conditions. This transducer will consist basically of two components, an elastic ... -
Double Optical Feedback Interferomety for biomedical applications
(Universitat Politècnica de Catalunya, 2013-07-19)
Master thesis
Open Access[ANGLÈS] Optical Feedback Interferometry (OFI) and Double Optical Feedback interferometry (DOFI) are studied as non-invasive techniques for biomedical measurements. Due to its compactness and cost-effectiveness, both sensors ... -
Estudi i caracterització de la resposta elèctrica d’elements piezoelèctrics davant diferents excitacions
(Universitat Politècnica de Catalunya, 2017-06)
Bachelor thesis
Open AccessL’objectiu d’aquest estudi és determinar les condicions òptimes de les tensions mecàniques, vibracions, a les que estaran sotmesos els transductors piezoelèctrics del tipus PI-876.A12 per aconseguir la màxima resposta ... -
Evaluation of trr distorting effects reduction in DCI-NPC multilevel power amplifiers by using SiC diodes and MOSFET technologies
(Curran, 2013)
Conference report
Restricted access - publisher's policyIn the last decade, the Power Amplifier applications have used multilevel diode-clamped-inverter or neutral-point-clamped (DCI-NPC) topologies to present very low distortion at high power. In these applications a lot of ... -
High voltage pulser for NDE air-coupled lamb wave ultrasonic system
(American Institute of Physics (AIP), 2010)
Conference report
Restricted access - publisher's policyThis paper describes a high voltage pulser developed for an air-coupled ultrasonic array NDE system based on Lamb waves. Unlike the classical single pulse excitation circuits, this pulser is able to generate a bipolar ... -
Implementación de un transponder 64QAM en FPGA mediante Simulink
(Universitat Politècnica de Catalunya, 2016-09)
Bachelor thesis
Open AccessThe current evolution of communication systems has been driven by the high demand of resources that are needed to satisfy services which are dependent of the network. To contain the high requirements of current and emerging ... -
Improvement of a configurable excitation system of an array of ultrasound transducers for transcranial insonation
(Universitat Politècnica de Catalunya, 2022-05-27)
Master thesis
Restricted access - confidentiality agreement -
Laser interferometric measurements of air-coupled lamb waves
(American Institute of Physics (AIP), 2010)
Conference report
Restricted access - author's decisionIn this paper, experimental measurements of the vibration pattern that results when an air-coupled A0 Lamb wave mode propagates in a plate are presented. Lamb waves are generated using an air-coupled piezoelectric transducer ... -
Low Consumption Flux-Gate Transducer
(2009-07)
Article
Open Access -
New insights into the optical control of macroscopic polarization in ferroelectric crystals
(Universitat Politècnica de Catalunya, 2017-06)
Bachelor thesis
Open Access -
New strategy to minimize dead-time distortion in DCI-NPC power amplifiers using COE-error injection
(Curran, 2013)
Conference report
Restricted access - publisher's policyThe DCI-NPC topology has become one of the best options to optimize energy efficiency in the world of high power and high quality amplifiers. This can use an analog PWM modulator that is sensitive to generate distortion ... -
Novel readout techniques for nanoelectromechanical resonators
(Universitat Politècnica de Catalunya, 2017-05)
Master thesis
Restricted access - author's decision
Covenantee: École polytechnique fédérale de LausanneNanoelectromechanical resonators have shown outstanding performance in mass sensing and heavy filtering applications due to their exceptional sensitivities and high quality factors, among other characteristics. The ... -
Nueva plataforma dinamométrica para el análisis y valoración del rendimiento deportivo
(Sociedad Ibérica de Biomecánica y Biomateriales, 1993)
Article
Open AccessUn nuevo modelo de plataforma dinamométrica ha sido desarrollado por el Instituto de Biomecánica de Valencia (IBV) y se han fabricado sus primeros prototipos. Permite la medida de la fuerza de reaccipón tridimensional, en ... -
Projecte de disseny mecànic per a una bàscula de precisió per al pesat i centrat de planadors
(Universitat Politècnica de Catalunya, 2017-06-20)
Master thesis
Restricted access - author's decision -
Respuesta extrínseca y comportamiento no lineal en materiales cerámicos piezoeléctricos
(Universitat Politècnica de Catalunya, 2009-02-19)
Doctoral thesis
Open AccessThe study of the elastic, dielectric and piezoelectric non-linear behavior in PZT-based and KNN-based piezoelectric ceramics represent the main goal of this work. Both systems present a perovskite-like structure. Several ...
