Browsing by Author "García Hernández, Miguel J."
Now showing items 1-20 of 25
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A novel distributed fiber-optic strain sensor
(2002-08)
Article
Restricted access - publisher's policyThe theory of operation of a fiber-optic-based strain sensor system, suitable for long structures, is described. The proposed sensor design is composed of several hundreds of sections separated by reflectors in order to ... -
Análisis de masas alimenticias mediante sensores electrónicos de ultrasonido: aplicación al estudio de masas de cereales
(2010-03)
Article
Open Access -
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 ... -
Design and implementation of an ultrasonic sensor for rapid monitoring of industrial malolactic fermentation of wines
(2017-12-19)
Article
Open AccessUltrasound is an emerging technology that can be applied to monitor food processes. However, ultrasonic techniques are usually limited to research activities within a laboratory environment and they are not extensively ... -
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 ... -
Guided wave sensing in a carbon steel pipe using a laser vibrometer system
(American Institute of Physics (AIP), 2010)
Conference report
Restricted access - publisher's policyNon-Destructive Evaluation (NDE) techniques have achieved a great development during the last decades as a valuable tool for material characterization, manufacturing control and structural integrity tests. Among these ... -
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 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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
Multichannel QCM-based system for continuous monitoring of bacterial biofilm growth
(2020-06)
Article
Open AccessQuartz crystal microbalance (QCM) sensors are becoming a good alternative to analytical methods for the measurement of bacterial growth in liquid media culture. For this purpose, two essential resonance parameters allow ... -
Process design involving ultrasound
(WILEY-BLACKWELL, 2012-04)
Part of book or chapter of book
Restricted access - publisher's policy -
Quartz crystal microbalance holder design for on-line sensing in liquid applications
(2016-05)
Article
Open AccessIn this paper, the design of a QCM sensor for liquid media measurements in vertical position is described. A rugged and low-cost proof holder has been designed, the cost of which is significantly lower than those ... -
Resizing buffer rods for ultrasound testing of food products with acoustic noise considerations
(2013-01)
Article
Restricted access - publisher's policyBuffer rods can be used to perform non-destructive and on-line analysis of food and beverage products. These rods, usually solid cylinders, can be long and heavy for certain applications. In this paper, a resizing analytic ... -
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 ... -
Study of the effect of angle errors in conical ultrasonic sensors
(2013-09-01)
Article
Restricted access - publisher's policyMany ultrasonic sensors intended for non-destructive testing include a plastic or metal element, known as buffer rod, between the ultrasonic transducer and the material under analysis. Buffer rods are often terminated in ... -
Temperature compensation of ultrasonic velocity during the malolactic fermentation process
(2015-11-04)
Article
Open AccessUltrasonic properties of materials present a strong dependence on temperature and in turn the ultrasonic velocity of propagation in the material under test. It is precisely for this reason that most ultrasonic measurements ...
