GRUP ISI - Grup d'Instrumentació, sensors i interfícies

 

Recerca de nous sensors i de mètodes de mesura basats en variacions d'impedància elèctrica i de les interfícies electròniques per al condicionament i el processament dels senyals, amb èmfasi en macrosensors basats en tecnologies de baix cost, sensors autònoms i intel·ligents, xarxes de sensors, processament analògic dels senyals, sistemes d'adquisició de dades, espectroscòpia i tomografia d'impedància elèctrica,reducció d'interferències i soroll a la instrumentació, mesura de paràmetres fisiològics amb mètodes no invasors i biotelemetria. Transferència de tecnologia en sensors i sistemes de mesura per a enginyeria.

Recent Submissions

  • Common mode response effects in differential measurements 

    Hornero Ocaña, Gemma; Casas Piedrafita, Óscar; Pallàs Areny, Ramon (2021-01)
    Article
    Open Access
    Differential measurements yield signals that are conditioned by differential or fully differential circuits which output depends on both the differential- and common-mode input voltages. Differential signals carry the ...

  • Sedimentation monitoring of the active biomass in bioreactors by electrical impedance spectroscopy 

    Cerrillo Moreno, Míriam; Serrano Finetti, Roberto Ernesto; Mata Calabuig, Nuria (2020)
    Conference report
    Open Access
    Sequencing batch reactors are used in wastewater treatment to produce biogas (methane). Currently, when biogas production ceases the active sludge sedimentation process is not monitored but operated on a fixed time basis. ...

  • On a finite domain magnetic localization by means of TMR triaxial sensors 

    Cerro, G; Ferrigno, L; Laracca, M; Milano, F.; Bellitti, Paolo; Serpelloni, Mauro; Casas Piedrafita, Óscar (Institute of Electrical and Electronics Engineers (IEEE), 2020)
    Conference report
    Open Access
    The paper proposes the realization and the preliminary characterization of a short–range localization systems based on the measurement of magnetic fields. Fixed anchors that generate sinusoidal wave magnetic fields at ...

  • Assessment of emotional states through physiological signals and Its application in music therapy for disabled people 

    Valenzuela Ramírez, Andrea; Hornero Ocaña, Gemma; Royo, Daniel; Aguilar, Angel; Casas Piedrafita, Óscar (Institute of Electrical and Electronics Engineers (IEEE), 2020-07-09)
    Article
    Open Access
    Disabled people have more difficulties for expression and interaction on a non-verbal level because of the physical, sensory or communication difficulties that they usually present. Regarding music therapy, the existing ...

  • Electromagnetic characterization of 3D printed antennas employing conductive filament 

    Pous Solà, Marc; Azpúrua Auyanet, Marco Aurelio; Quílez Figuerola, Marcos; Mateu Mateus, Marc; Fernández Chimeno, Mireya; Silva Martínez, Fernando (Institute of Electrical and Electronics Engineers (IEEE), 2020)
    Conference report
    Restricted access - publisher's policy
    This work presents the need to accurately define EM characterization of novel materials like the 3D conductive filament. Although these construction techniques and materials are currently used by the industry, the influence ...

  • Adquisición y tratamiento de datos para la caracterización de las acciones dinámicas en los disipadores de energía hidráulica 

    Castillo Elsitdié, Luis Gerardo; Dolz Ripollès, Josep; Polo Cantero, José (1992-02)
    Article
    Open Access
    Las características de tridimensionalidad, turbulencia anisotrópica y no homogénea que se presentan en el flujo de los disipadores de energía hidráulica, no permiten un estudio analítico del problema, siendo por tanto la ...

  • Micro air vehicles energy transportation for a wireless power transfer system 

    Polo Cantero, José; Hontecillas Guinart, Lluís; Izquierdo Pérez, Ignacio; Casas Piedrafita, Óscar (2019-10-22)
    Article
    Open Access
    The aim of this work is to demonstrate the feasibility use of an Micro air vehicles (MAV) in order to power wirelessly an electric system, for example, a sensor network, using low-cost and open-source elements. To achieve ...

  • Cost-effective autonomous sensor for the long-term monitoring of water electrical conductivity of crop fields 

    Serrano Finetti, Roberto Ernesto; Aliau Bonet, Carles; López Lapeña, Oscar; Pallàs Areny, Ramon (2019-10-01)
    Article
    Open Access
    Salinity is a key parameter determining water quality. In agriculture, irrigation water with high salinity levels impacts plant growth and yield negatively hence there is a need to monitor it and irrigate with fresh water ...

  • A Fully Differential Synchronous Demodulator for AC Signals 

    González Landaeta, Rafael; Cota Ruiz, Juan; Sifuentes, Ernesto; Díaz, José; Casas Piedrafita, Óscar (2019-02-22)
    Article
    Restricted access - publisher's policy
    A novel fully differential (FD) demodulator is presented. Using different design strategies, the circuit can be used for processing amplitude-modulated (AM) signals obtained from impedance measurements or coming from ...

  • Comments on “A novel high input impedance front-end for capacitive biopotential measurement” 

    Pallàs Areny, Ramon (Springer, 2019-12-13)
    Article
    Open Access
    A front-end for biopotential sensing in wearable medical devices has been recently proposed which is claimed to provide 100 GOinput impedance by manually matching two resistor pairs in a positive- and a negative-feedback ...

  • Common mode electronic noise in differential circuits 

    Serrano Finetti, Roberto Ernesto; Casas Piedrafita, Óscar; Pallàs Areny, Ramon (2019-07-01)
    Article
    Open Access
    Differential circuits are assumed to reject common-mode noise yet no parameter is available to describethat rejection as the Common Mode Rejection Ratio (CMRR) applies only to deterministic signals, not torandom noise. We ...

  • A novel low-cost smart leaf wetness sensor 

    Hornero Ocaña, Gemma; Gaitán Pitre, Jorge Eliécer; Serrano Finetti, Roberto Ernesto; Casas Piedrafita, Óscar; Pallàs Areny, Ramon (2017-12-01)
    Article
    Open Access

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