Ara es mostren els items 1-19 de 19

  • Agrupación plana alimentada por linea de sustrato suspendido 

    Torrents Dolz, Josep M.; Romeu Robert, Jordi; Jofre Roca, Lluís (1989)
    Text en actes de congrés
    Accés obert
    The purpose of this design is a new type of planar antenna with hi gh-efficency and large-bandwidth requirements of TVRO. A low loss suspended substrate line (SSL ) has been developed and optimisated for feed network.
  • A new method for sea wave detection by using a speed log meter 

    Recolons Martos, Jaume; Torrents Dolz, Josep M. (2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    We present two different methods for measuring waves from the information provided by the speed log meter onboard. The first method processes data in the time domain, and is based in the measurement of the standard deviation ...
  • Aplicaciones estructurales de hormigón con fibras 

    Joost, Walraven; Torrents Dolz, Josep M.; Serna, P; di Prisco, Marco; Aguado de Cea, Antonio; Armengou, Jaume; Barragán, Bryan Erick; Fuente Antequera, Albert de la; Lambrechts, Ann; Laranjeira de Oliveira, Filipe; Molins i Borrell, Climent; Mora, Felipe (Universitat Politècnica de Catalunya. Departament d'Enginyeria de la Construcció (EC), 2007)
    Llibre
    Accés restringit per política de l'editorial
    Dentro del planteamiento de la Cátedra de empresa titulada Innovación en Tecnología del Hormigón patrocinada por BASF-MOLINS-BEKAERT está la celebración de jornadas técnicas. El presente documento es una muestra de este ...
  • Assessment of fibre content and 3D profile in cylindrical SFRC specimens 

    Pialarissi Cavalaro, Sergio Henrique; López Carreño, Rubén-Daniel; Torrents Dolz, Josep M.; Aguado de Cea, Antonio; Juan Garcia, Pablo (2016-01)
    Article
    Accés obert
    The inductive method from Torrents et al. (Mater Struct 45(10):1577–1592, 2012, 1) is used to assess the fibre content and orientation in steel fibre reinforced concrete. Despite several advantages, the method presents ...
  • Assessment of fibre content and orientation in SFRC with the inductive method. Part 1: theoretical basis of the method and study of the influence of the type of coil and temperature on its accuracy 

    López Carreño, Rubén-Daniel; Pialarissi Cavalaro, Sergio Henrique; Pujadas Álvarez, Pablo; Galobardes Reyes, Isaac; Torrents Dolz, Josep M.; Aguado de Cea, Antonio; Domingues de Figueiredo, Antonio (2015)
    Text en actes de congrés
    Accés obert
    The inductive method is a non-destructive test which is capable to estimate both the fibre orientation and the fibre content in steel fibre reinforced concrete (SFRC) samples by the means of a coil and an impedance analyser. ...
  • Compensation of impedance meters when using an external front-end amplifier 

    Torrents Dolz, Josep M.; Pallàs Areny, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2002-04-30)
    Article
    Accés obert
    Four-terminal impedance meters based on pseudo-bridges yield unexpected uncertainties when using high-contact-impedance electrodes. Adding a front-end amplifier to the impedance meter and rearranging the connection of the ...
  • Electrical impedance as a technique for civil engineer structures surveillance : considerations on the galvanic insulation of samples 

    Torrents Dolz, Josep M.; Juan Garcia, Pablo; Aguado de Cea, Antonio (Institute of Physics, 2007)
    Article
    Accés obert
    Since Electric Impedance Spectroscopy (EIS) has been widely used to determine physical properties of materials, it becomes necessary to evaluate different error contributions. In this work, it is studied the effect of the ...
  • Error analysis in two-terminal impedance measurements with residual correction 

    Torrents Dolz, Josep M.; Pallàs Areny, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-10-31)
    Article
    Accés obert
    Residual impedance correction in impedance analyzers when using an asymmetrical test fixture needs three reference measurements, usually open circuit, short circuit, and load (meaning an impedance close to the impedance ...
  • Improved assessment of fibre content and orientation with inductive method in SFRC 

    Pialarissi Cavalaro, Sergio Henrique; López Carreño, Rubén-Daniel; Torrents Dolz, Josep M.; Aguado de Cea, Antonio (2015-06)
    Article
    Accés obert
    The inductive method is a robust and simple non-destructive test to assess the content and the distribution of steel fibres in FRC. Despite the advantages in comparison with other methods, further studies are still needed ...
  • Inductive method for assessing the amount and orientation of steel fibers in concrete 

    Torrents Dolz, Josep M.; Blanco Álvarez, Ana; Pujadas Álvarez, Pablo; Aguado de Cea, Antonio; Juan Garcia, Pablo; Sánchez-Moragues, Miguel Ángel (2012-04-24)
    Article
    Accés restringit per política de l'editorial
    Steel fibers are ferromagnetic and they have the property of altering the magnetic field around them. This paper discusses a method and gives a practical example to measure, non-destructively, the amount and orientation ...
  • Influence of fiber properties on the inductive method for the steel-fiber-reinforced concrete characterization 

    Juan-García, Pablo; Torrents Dolz, Josep M.; López Carreño, Rubén-Daniel; Pialarissi Cavalaro, Sergio Henrique (2016-08-01)
    Article
    Accés obert
    The inductive method has shown to be a good method for the estimation of fiber dosage in steel-fiber-reinforced concrete. The current formulations reported a strong correlation between inductance and fiber content, as well ...
  • Measurement of moisture in mortar using a coplanar waveguide 

    Juan Garcia, Pablo; Torrents Dolz, Josep M. (2009)
    Text en actes de congrés
    Accés obert
    Increasingly more non-destructive testing methods are being developed in a civil engineering context, but many of them cannot be applied when only one surface of the structure can be accessed. In order to measure moisture ...
  • Measurement of mortar permittivity during setting using a coplanar waveguide 

    Juan Garcia, Pablo; Torrents Dolz, Josep M. (2010-03)
    Article
    Accés obert
    A sensor based on a coplanar waveguide structure was designed to perform non-destructive tests for material characterization in which the measurement can be done only on one side of the sample. The measurements were compared ...
  • Method for forming a magnec field of arbitrary shape from an established template 

    Torrents Dolz, Josep M.; Juan García, Pablo; Sánchez Moragues, Miguel Ángel (Universitat Politècnica de Catalunya (UPC), 2013)
    Text en actes de congrés
    Accés obert
    A strategy to design a particular form of magnetic field along an axis from a coaxial inductor is described. The procedure is illustrated with the design of a constant magnetic field inside a cubic inductor. It validates ...
  • Method for forming a magnetic field of arbitrary shape from an established template 

    Torrents Dolz, Josep M.; Juan García, Pablo; Sánchez Moragues, Miguel Ángel (Universitat Politècnica de Catalunya (UPC), 2013)
    Text en actes de congrés
    Accés obert
    A strategy to design a particular form of magnetic field along an axis from a coaxial inductor is described. The procedure is illustrated with the design of a constant magnetic field inside a cubic inductor. It validates ...
  • Subsurface resistivity measurements using square waveforms 

    Gasulla Forner, Manuel; Jordana Barnils, José; Pallàs Areny, Ramon; Torrents Dolz, Josep M. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-02-28)
    Article
    Accés obert
    This work analyzes the effect of inductive and capacitive coupling between the injecting circuit and the detecting circuit in resistive field surveys. Theoretical and experimental results demonstrate that if a square ...
  • Surveillance of steel fibre reinforced concrete slabs measured with an open-ended coaxial probe 

    Torrents Dolz, Josep M.; Juan Garcia, Pablo; Patau, Oriol; Aguado de Cea, Antonio (2009)
    Text en actes de congrés
    Accés obert
    Conventional concrete structures are nowadays being substituted by steel fibre reinforced concrete (SFRC) in some structural applications. Then, fibre dosage and distribution is a keyword for ensuring quality control of ...
  • The floating capacitor as a differential building block 

    Gasulla Forner, Manuel; Jordana Barnils, José; Pallàs Areny, Ramon; Torrents Dolz, Josep M. (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1998-02-28)
    Article
    Accés obert
    This paper analyzes the advantages and limitations of using the floating- (or flying-) capacitor technique as a building block with differential input and either differential or single-ended output to implement voltage ...
  • Uncertainty analysis in two-terminal impedance measurements with residual correction 

    Torrents Dolz, Josep M.; Pallàs Areny, Ramon (Institute of Electrical and Electronics Engineers, 2001-05)
    Text en actes de congrés
    Accés obert
    Residual impedance correction in impedance analyzers when using an asymmetrical test fixture needs three reference measurements, usually open circuit, short circuit, and load (meaning an impedance close to the impedance ...