Now showing items 1-20 of 24

  • Agrupación plana alimentada por linea de sustrato suspendido 

    Torrents Dolz, Josep M.; Romeu Robert, Jordi; Jofre Roca, Lluís (1989)
    Conference report
    Open Access
    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)
    Conference report
    Restricted access - publisher's policy
    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)
    Book
    Restricted access - publisher's policy
    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
    Open Access
    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)
    Conference report
    Open Access
    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. ...
  • La Babel de los sistemas de medida : la unificación del sistema de medida dimensional es imitado por la unificación del sistema monetario 

    Torrents Dolz, Josep M. (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 2002)
    Article
    Open Access
  • 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
    Open Access
    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 ...
  • Desenvolupament de tècniques de mesura d'impedància elèctrica aplicada a la caracterització de sòls 

    Torrents Dolz, Josep M. (Universitat Politècnica de Catalunya, 1996-11-25)
    Doctoral thesis
    Open Access
    La humitat és un dels paràmetres més característics del sòl i el seu coneixement té interès des de diversos àmbits de la enginyeria. Conèixer la humitat mitjançant la impedància elèctrica planteja un estudi acurat de les ...
  • Development of conductive cementitious materials using recycled carbon fibres 

    Faneca Llesera, Gerard; Segura Pérez, Ignacio; Torrents Dolz, Josep M.; Aguado de Cea, Antonio (2018-09)
    Article
    Restricted access - publisher's policy
    Conductive cementitious materials have gained immense attention in recent years owing to the possibility of achieving multifunctional materials. The usual approach has been to incorporate carbonaceous nanomaterials and/or ...
  • 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
    Open Access
    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
    Open Access
    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 ...
  • Examen final 

    Torrents Dolz, Josep M. (Universitat Politècnica de Catalunya, 2019-06-12)
    Exam
    Restricted access to the UPC academic community
  • 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
    Open Access
    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
    Restricted access - publisher's policy
    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
    Open Access
    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)
    Conference report
    Open Access
    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
    Open Access
    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)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
    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 ...
  • Self-sensing concrete made from recycled carbon fibres 

    Segura Pérez, Ignacio; Faneca Llesera, Gerard; Torrents Dolz, Josep M.; Aguado de Cea, Antonio (2019-10)
    Article
    Restricted access - publisher's policy
    The electrical and piezo-resistive responses of recycled carbon fibre (rCF)-reinforced concrete is analysed in this article. Two different PAN-based rCFs (monofilament rCF and fibrillated rCF sheets) incorporated into dry ...