Now showing items 1-20 of 24

  • Análisis de masas alimenticias mediante sensores electrónicos de ultrasonido: aplicación al estudio de masas de cereales 

    García Álvarez, Víctor Óscar; Gomez, M.; Rosell, C. M.; Turó Peroy, Antonio; Chávez Domínguez, Juan Antonio; García Hernández, Miguel J.; Salazar Soler, Jorge (2010-03)
    Article
    Open Access
  • A novel distributed fiber-optic strain sensor 

    García Hernández, Miguel J.; Ortega Redondo, Juan Antonio; Chávez Domínguez, Juan Antonio; Salazar Soler, Jorge; Turó Peroy, Antonio (2002-08)
    Article
    Restricted access - publisher's policy
    The 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 ...
  • Characterization of nonhomogeneity in the dispersive properties of the materials used in pipes 

    Millán Blasco, Oliver; Salazar Soler, Jorge; Chávez Domínguez, Juan Antonio; Turó Peroy, Antonio; García Hernández, Miguel J. (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
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    This 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 

    Chávez Domínguez, Juan Antonio; García Hernández, Miguel J.; Millán Blasco, Oliver; Tur Gaspar, Ignasi; Turó Peroy, Antonio; Amer, Miquel Àngel; Salazar Soler, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
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    This 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 

    Celik, Dervis; Amer Boixareu, Miguel Ángel; Novoa Díaz, Daniel F.; Chávez Domínguez, Juan Antonio; Turó Peroy, Antonio; García Hernández, Miguel J.; Salazar Soler, Jorge (2017-12-19)
    Article
    Open Access
    Ultrasound 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 

    García Álvarez, Javier; García Hernández, Miguel J.; Chávez Domínguez, Juan Antonio; Turó Peroy, Antonio; Salazar Soler, Jorge (Institute of Electrical and Electronics Engineers (IEEE), 2011)
    Conference report
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    Buffer 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 

    Ruiz Toledo, Abelardo; Salazar Soler, Jorge; Chávez Domínguez, Juan Antonio; García Hernández, Miguel J.; Turó Peroy, Antonio (American Institute of Physics (AIP), 2010)
    Conference report
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    Non-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 

    García Rodríguez, Mercedes; Arjones, V.; Yañez, Y.; García Hernández, Miguel J.; Salazar Soler, Jorge; Turó Peroy, Antonio; Chávez Domínguez, Juan Antonio (American Institute of Physics (AIP), 2010)
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    This 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 

    Sayrol Clols, Elisa; Onrubia, Raúl; García Hernández, Miguel J.; Oliveras Vergés, Albert; Bragós Bardia, Ramon; Pegueroles Vallés, Josep R.; Alarcón Cot, Eduardo José; Camps Carmona, Adriano José; Sardà Ferrer, Joan; Consolación Segura, Carolina María; Mussons Sellés, Jaume; Pons Peregort, Olga (IEEE, 2011)
    Conference report
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    En 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 

    Millán Blasco, Oliver; Salazar Soler, Jorge; Chávez Domínguez, Juan Antonio; Turó Peroy, Antonio; García Hernández, Miguel J. (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
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    Clamp-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 

    García Rodríguez, Mercedes; Yañez, Y.; García Hernández, Miguel J.; Salazar Soler, Jorge; Turó Peroy, Antonio; Chávez Domínguez, Juan Antonio (American Institute of Physics (AIP), 2010)
    Conference report
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    In 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 

    Millán Blasco, Oliver; Salazar Soler, Jorge; Chávez Domínguez, Juan Antonio; Turó Peroy, Antonio; García Hernández, Miguel J. (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
    Open Access
    This 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 

    Novoa-Díaz, Daniel F.; Puig-Pujol, A.; Rodríguez Nogales, J. M.; Fernández Fernández, E.; Vila Crespo, J.; Capdevila, F; Amer, M.A.; García Álvarez, Víctor Óscar; Chávez Domínguez, Juan Antonio; García Hernández, Miguel J.; Turó Peroy, Antonio; Salazar Soler, Jorge (AMV, 2013)
    Conference report
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    La 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 ...
  • Process design involving ultrasound 

    Salazar Soler, Jorge; Turó Peroy, Antonio; Chávez Domínguez, Juan Antonio; García Hernández, Miguel J. (WILEY-BLACKWELL, 2012-04)
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  • Quartz crystal microbalance holder design for on-line sensing in liquid applications 

    Amer, M.A.; Chávez Domínguez, Juan Antonio; García Hernández, Miguel J.; Salazar Soler, Jorge; Turó Peroy, Antonio (2016-05)
    Article
    Open Access
    In 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 

    García Álvarez, J.; García Hernández, Miguel J.; Novoa-Díaz, D.F.; Turó Peroy, Antonio; Chávez Domínguez, Juan Antonio; Salazar Soler, Jorge (2013-01)
    Article
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    Buffer 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 

    Millán Blasco, Oliver; Salazar Soler, Jorge; Chávez Domínguez, Juan Antonio; Turó Peroy, Antonio; García Hernández, Miguel J. (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Conference report
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    This 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 

    García Álvarez, Víctor Óscar; García Hernández, Miguel J.; Chávez Domínguez, Juan Antonio; Turó Peroy, Antonio; Salazar Soler, Jorge (2013-09-01)
    Article
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    Many 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 ...
  • Técnicas de ultrasonidos aplicadas al reconocimiento "in situ" de discontinuidades visibles en soleras de hormigón armado 

    Zamora i Mestre, Joan-Lluís; García Hernández, Miguel J. (2009-03-20)
    Conference report
    Open Access
  • Temperature compensation of ultrasonic velocity during the malolactic fermentation process 

    Amer, Miquel Àngel; Novoa-Díaz, Daniel F.; Chávez Domínguez, Juan Antonio; Turó Peroy, Antonio; García Hernández, Miguel J.; Salazar Soler, Jorge (2015-11-04)
    Article
    Open Access
    Ultrasonic 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 ...