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.

Enviaments recents

  • Battery aging impedance spectroscopy and incremental capacity analysis 

    Ovejas Benedicto, Victòria Júlia; Cuadras Tomàs, Àngel (ZAHNER-elektrik GmbH & Co. KG, 2017)
    Text en actes de congrés
    Accés obert
    We analize electrochemical LiFePO4 cells with impedance spectroscopy and incremental capacity analysis in order to establish a correlation with capacity fade. We found that polarization and diffusion impeances increased ...

  • Battery Impedance Spectroscopy obtained from Electrochemical Model 

    Miró Jané, Pol; Cuadras Tomàs, Àngel (2017)
    Text en actes de congrés
    Accés obert
    We investigate impedance spectra obtained from an electrochemical model using pulsed signals. We characterize the dependence of NiMH battery parameters such as electrodes porosity and conductivity on impedance. We are able ...

  • Biosensors for m-health 

    Pallàs Areny, Ramon (2017-06-14)
    Presentació
    Accés obert

  • Multisensor system for analyzing the thigh movement during walking 

    Borghetti, Michela; Serpelloni, Mauro; Sardini, Emilio; Casas Piedrafita, Óscar (2017-08-01)
    Article
    Accés obert
    Body movements monitoring may allow preventing, diagnosing, and recovering several wrong attitudes that could lead to possible future diseases. A multisensor system was developed to measure thigh movements in free-living ...

  • A novel algorithm for fast BCG cycle extraction in ambulatory scenarios 

    Gomez Clapers, Joan; Casanella Alonso, Ramón; Pallàs Areny, Ramon (2016)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    A novel algorithm JDet for ballistocardiogram (BCG) cycle extraction is presented that is intended for the fast generation of ensemble averages in ambulatory scenarios where the ECG signal is not available. First, the ...

  • Impact of the mechanical interface on BCG signals obtained from electronic weighing scales 

    Casanella Alonso, Ramón; Gomez Clapers, Joan; Hernández Urrea, Marc; Pallàs Areny, Ramon (2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This work analyzes the reproducibility of the BCG obtained from different weighing scales. First, the natural frequency of three commercial bathroom scales has been characterized by an impulse excitation test. Second, the ...

  • Direct pulse transit time measurement from an electronic weighing scale 

    Gomez Clapers, Joan; Casanella Alonso, Ramón; Pallàs Areny, Ramon (2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    A novel method to measure Pulse Transit Time (PTT) from the force sensors of a modified electronic weighing scale is presented. The method relies on the relation between PTT and the interval between I and J waves of the ...

  • On the feasibility of noncontact ECG measurements 

    Pallàs Areny, Ramon; Casas Piedrafita, Óscar (2016-03-01)
    Article
    Accés obert
    The article by Kranjec et al. [1], “Novel methods of noncontact heart rate measurement: A feasibility study” is interesting and informative as it compares different contactless methods for heart rate detection. Nevertheless, ...

  • The QT scale: a weight scale measuring the QTc interval 

    Couderc, Jean-Philippe; Beshaw, Connor; Xiaodan, Niu; Serrano Finetti, Roberto Ernesto; Casas Piedrafita, Óscar; Pallàs Areny, Ramon; Rosero, Spencer; Zareba, Wojciech (Wiley, 2017-01)
    Article
    Accés obert
    Despite the strong evidence of the clinical utility of QTc prolongation as a surrogate marker of cardiac risk, QTc measurement is not part of clinical routine either in hospital or in physician of fi ces. We evaluated ...

  • On bio activity related signals from contactless electrode measurements 

    Pallàs Areny, Ramon; Casas Piedrafita, Óscar (2016-02-01)
    Article
    Accés obert
    In a recent paper on a displacement current sensor for contactless detection of bio-activity related signals [1], it was stated that “A potential means for human presence detection…is via sensing…human biopotentials” ...

  • Enabling atrial fibrillation detection using a weight scale 

    Ayers, Brian; Beshaw, Connor; Serrano Finetti, Roberto Ernesto; Casas Piedrafita, Óscar; Pallàs Areny, Ramon; Couderc, Jean-Philippe (2016)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Atrial fibrillation (AF) is a cardiac arrhythmia characterized by a highly irregular heart rate. It is the most prevalent arrhythmia in the general population in the United States and most developed countries, and ...

  • Online cellphone battery entropy measurement for SoH estimation 

    Cuadras Tomàs, Àngel; Meinert, Florian; Büschel, Paul; Kanoun, Olfa (2016)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The widespread use of batteries requires knowledge of their state of health (SoH). In this paper we present a method to use entropy evolution as an aging indicator for batteries. Voltage, current and temperature are ...

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