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

  • Piecewise linearization of quadratic transfer characteristics 

    Pallàs-Areny, Ramon (2022-05-19)
    Research report
    Open Access
    Piecewise linearization replaces a nonlinear transfer characteristic curve by a string of linear segments that connect several calibration points of the curve. This technique can be implemented by low-power digital ...

  • Effects of stray capacitance to ground in impedance measurements 

    Aliau Bonet, Carles; Quílez Figuerola, Marcos (Elsevier, 2021)
    Part of book or chapter of book
    Restricted access - publisher's policy
    Inductive effects such as positive phase angles in impedance measurements have often confused the researchers when the material measured is nonmagnetic. When the measurement is based on auto-balancing bridge method and the ...

  • Basic design of the signal chain in sensor-based measurement systems 

    Pallàs-Areny, Ramon; Casas Piedrafita, Óscar (2022-04-19)
    Research report
    Open Access
    Sensor signals do not suit direct electronic communication and need further processing before being digitized. Therefore, the requirements of the digitizer add to those needed to fulfill the basic specifications for the ...

  • Characterization of time domain EM field double-loaded curved loop probe 

    Pous Solà, Marc; Quílez Figuerola, Marcos; Fernández Chimeno, Mireya; Silva Martínez, Fernando (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    In this paper, we present and analyze the performance of a double-loaded curved loop probe to measure simultaneously electric and magnetic fields (EMF). The aim is to construct a probe that can be fitted to non-planar ...

  • Magnetic localization system for short-range positioning: a ready-to-use design tool 

    Ferrigno, L; Laracca, M; Casas Piedrafita, Óscar; Cerro, G; Bellitti, Paolo; Serpelloni, Mauro; Milano, Filippo (2021)
    Article
    Open Access
    Magnetic localization is used in many indoor positioning applications, such as industrial, medical, and IoT, for its benefits related to the absence of line of sight needs, multipath and fading, the low cost of transmitters ...

  • Non-contact video-based assessment of the respiratory function using a RGB-D camera 

    Valenzuela Ramírez, Andrea; Hornero Ocaña, Gemma; Casas Piedrafita, Óscar; Sibuet Ruiz, Nicolás (Multidisciplinary Digital Publishing Institute (MDPI), 2021-08-20)
    Article
    Open Access
    A fully automatic, non-contact method for the assessment of the respiratory function is proposed using an RGB-D camera-based technology. The proposed algorithm relies on the depth channel of the camera to estimate the ...

  • Entropy generation model to estimate battery ageing 

    Cuadras Tomàs, Àngel; Miró Jané, Pol; Ovejas Benedicto, Victòria Júlia; Estrany Coda, Francesc (Elsevier, 2020-12)
    Article
    Restricted access - publisher's policy
    Determining battery ageing is a key issue in predicting the available charge in battery-operated systems. Beyond the common use of voltage or current measurements, which have proved unsuccessful as general methods, we aim ...

  • Hydrophobic membranes for ammonia recovery from digestates in microbial electrolysis cells: Assessment of different configurations 

    Cerrillo Moreno, Míriam; Burgos Rodríguez, Laura; Serrano Finetti, Roberto Ernesto; Riau Arenas, Victor; Noguerol Arias, Joan; Bonmatí Blasi, August (Elsevier, 2021-08)
    Article
    Restricted access - publisher's policy
    The combination of hydrophobic membranes and microbial electrolysis cells (MEC) was assessed in two different configurations in order to recover ammonia from anaerobically digested pig slurry. Politetrafluorethilene ...

  • Analysis of energy and entropy balance in a residential building 

    Rico Perez, Angel; Ovejas Benedicto, Victòria Júlia; Cuadras Tomàs, Àngel (2022-01-20)
    Article
    Restricted access - publisher's policy
    The energy performance of a building located in La Roca del Vallès, close to Barcelona in Spain designed under the near Zero Energy Building (nZEB) and Net Zero Energy Building (NZEB) criteria was investigated. The aim was ...

  • 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 ...

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