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

  • 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
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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

  • Solar energy radiation measurement with a low–power solar energy harvester 

    López Lapeña, Oscar; Pallàs Areny, Ramon (2018-08-01)
    Article
    Open Access
    Solar energy radiation measurements are essential in precision agriculture and forest monitoring and can be readily performed by attaching commercial pyranometers to autonomous sensor nodes. However this solution significantly ...

  • Time-Division Multiplexing Control of Multi-Input Converters for Low-Power Solar Energy Harvesters 

    López Lapeña, Oscar (Institute of Electrical and Electronics Engineers (IEEE), 2018-03-29)
    Article
    Open Access
    Many autonomous sensor nodes use small photovoltaic (PV) panels oriented towards the direction that provides the highest energy yield in the worst-case scenario. Since all those panels operate at similar irradiance and ...

  • Accelerating K-mer Frequency Counting with GPU and Non-Volatile Memory 

    Cadenelli, Nicola; Polo Cantero, José; Carrera Pérez, David (2018)
    Conference report
    Open Access
    The emergence of Next Generation Sequencing (NGS) platforms has increased the throughput of genomic sequencing and in turn the amount of data that needs to be processed, requiring highly efficient computation for its ...

  • Journal of Electrical Bioimpedance 

    Pallàs Areny, Ramon (University of Oslo, 2018-07-30)
    Article
    Open Access

  • Method and apparatus for obtaining cardiovascular information by measuring between two extremities 

    Pallàs Areny, Ramon; Casanella Alonso, Ramón; Gómez Clapers, Joan (2014-06-04)
    External research report
    Open Access
    In this patent of invention there are described a method and an apparatus for obtaining information on the cardiovascular system beat by beat and continuously which are based exclusively on measurements between two limbs ...

  • Performance characterization of spark workloads on shared NUMA Systems 

    Baig, Shuja-ur-Rehman; Amaral, Marcelo; Polo Cantero, José; Carrera Pérez, David (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    As the adoption of Big Data technologies becomes the norm in an increasing number of scenarios, there is also a growing need to optimize them for modern processors. Spark has gained momentum over the last few years among ...

View more