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Recent Submissions
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Effect of angle errors in conical tip buffer rods
(Institute of Electrical and Electronics Engineers (IEEE), 2011)
Conference report
Restricted access - publisher's policyBuffer rods are usually plastic or metallic solid cylinders of known acoustic properties, which are placed between the ultrasonic transducer and the sample under study. For some applications, the buffer rod end in contact ... -
Linearity error in Clamp-on ultrasonic flowmeters due to the installation on pipes made of dispersive materials
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference report
Open AccessThis article analyses and explains the implications that dispersive materials have over the linearity in flow measurement when a Clamp-on ultrasonic flowmeter is used. This is of capital importance because dispersive ... -
Influence on the accuracy of clamp-on ultrasonic flowmeters due to the recombination of multiple propagation paths
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference report
Restricted access - publisher's policyClamp-on ultrasonic flowmeters geometry includes four different materials in the ultrasound propagation path: wedge, coupling material, pipe and liquid. In this case, oblique incidence ultrasonic beam generated by the ... -
Splitting of the ultrasounic beam path in clamp-on ultrasonic flowmeters due to propagation through dispersive materials
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference report
Restricted access - publisher's policyThis article explains how a multi-frequency ultrasonic beam path is split due to passing through dispersive materials and the implications that it has in flow measurement using a Clamp-on ultrasonic flowmeter. The importance ... -
Characterization of nonhomogeneity in the dispersive properties of the materials used in pipes
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference report
Restricted access - publisher's policyThis article is focused on the characterization of the lack of homogeneity in the dispersive acoustic properties of polymeric materials used in industrial pipes. Usually, the parameter of interest associated to dispersion ... -
Comparison between sine wave fitting and zero- crossing methods applied to QCM impedance measurements
(Institute of Electrical and Electronics Engineers (IEEE), 2017)
Conference report
Restricted access - publisher's policyThis paper presents a comparison between two algorithms for sinusoidal signal characterization applied to QCM impedance measurements. These algorithms are the zero crossing and peak detection method and the 7 parameters ... -
Analisis y diseño de un oscilador en banda V
(1991)
Conference report
Open AccessIn this paper the analysis and design of an oscillator in V band is presented. Taking advantage of a coaxial oscillation, sorne results related with frequency stability have been obtained. A special attention has been paid ... -
Monitorización del proceso de fermentación maloláctica en el vino tinto mediante propagación de ondas de ultrasonido
(AMV, 2013)
Conference report
Restricted access - publisher's policyLa acción de las bacterias fácticas, durante la fermentación maloláctica (FML) del vino tinto, tiene como principal finalidad la reducción del nivel de concentración del ácido málico al tiempo que se va incrementando el ... -
Implementación y primeros resultados de la asignatura de introducción a la ingeniería en los nuevos grados de la ETSETB-UPC
(IEEE, 2011)
Conference report
Restricted access - publisher's policyEn este trabajo se describe la asignatura "Introducción a la Ingeniería de las TIC" que, basándose en restricciones y especificaciones iniciales, ha sido concebida, diseñada e implementada en la ETSETB de la UPC. Es la ... -
Análisis y diseño de un oscilador en banda V
(1991)
Conference report
Restricted access - publisher's policyIn this paper the analysis and design of an oscillator in V ban is presented. Taking advantage of a coaxial oscillation, some results related with frequency stability have been obtained. A special attention has been paid ... -
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 ... -
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 ...
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