Ara es mostren els items 1-20 de 28

  • A contactless capacitive angular-position sensor 

    Gasulla Forner, Manuel; Li, Xiujun; Meijer, Gerard C. M.; Van der Ham, Lucas; Spronck, Jo W. (Institute of Electrical and Electronics Engineers, 2003-10)
    Article
    Accés obert
    This paper presents an absolute capacitive angular-position sensor with a contactless rotor. The sensor is mainly composed of three parts: the capacitive sensing element, a signal processor, and a microcontroller. The ...
  • A high-efficiency matching technique for low power levels in RF harvesting 

    Anchustegui Echearte, Iker; Jimenez Lopez, David; Gasulla Forner, Manuel; Giuppi, Francesco; Georgiadis, Apostolos (The Electromagnetics Academy, 2013)
    Text en actes de congrés
    Accés obert
    Radiofrequency (RF) energy can be harvested in order to power autonomous sensors either from the surrounding environment or from dedicated sources. A conventional RF harvester is mainly composed by an antenna, a matching ...
  • A high-speed capacitive-sensor interface using a relaxation oscillator and a fast counter 

    Gasulla Forner, Manuel; Li, Xiujun; Meijer, Gerard C. M. (Institute of Electrical and Electronics Engineers, 2003-05)
    Text en actes de congrés
    Accés obert
    This paper presents the analysis and experimental results on the jitter of a capacitive-sensor interface. The interface is implemented with a simple relaxation oscillator, a fast counter and a microcontroller. The goal ...
  • A new MPPT method for low-power solar energy harvesting 

    López Lapeña, Oscar; Penella López, María Teresa; Gasulla Forner, Manuel (2010-09)
    Article
    Accés obert
    This paper describes a new maximum-power-pointtracking (MPPT) method focused on low-power (< 1 W) photovoltaic (PV) panels. The static and dynamic performance is theoretically analyzed, and design criteria are provided. ...
  • A review of commercial energy harvesters for autonomous sensors 

    Penella López, María Teresa; Gasulla Forner, Manuel (2007-05-01)
    Text en actes de congrés
    Accés obert
    Current commercial autonomous sensors are mainly powered by primary batteries. Batteries need to be replaced and hence can become the largest and most expensive part of the system. On the other hand, our environment is ...
  • A simple and efficient MPPT method for low-power PV cells 

    Penella López, María Teresa; Gasulla Forner, Manuel (2014-01-01)
    Article
    Accés obert
    Small-size PV cells have been used to power sensor nodes. These devices present limited computing resources and so low complexity methods have been used in order to extract the maximum power from the PV cells. Among them, ...
  • A ZigBee wireless sensor network compliant with the IEEE1451 standard 

    Higuera Portilla, Jorge Eduardo; Polo Cantero, José; Gasulla Forner, Manuel (2009)
    Text en actes de congrés
    Accés obert
    Wireless sensor networks are becoming very attractive for monitoring and control applications with smart sensor nodes. We present an implementation of a ZigBee wireless sensor network compliant with the IEEE1451 standard ...
  • Análisis de una tecnología de carga de dispositivos inalámbricos. Informe técnico 

    Gasulla Forner, Manuel (2015-01-22)
    Report de recerca
    Accés restringit per acord de confidencialitat
  • Direct inductive sensor-to-microcontroller interface circuit 

    Kokolanski, Zivko; Jordana Barnils, José; Gasulla Forner, Manuel; Dimcev, Vladimir; Reverter Cubarsí, Ferran (2015-04-01)
    Article
    Accés obert
    This paper proposes and analyses a microcontroller-based interface circuit for inductive sensors with a variable self-inductance. Besides the microcontroller (mu C) and the sensor, the circuit just requires an external ...
  • Direct interface for capacitive sensors based on the charge transfer method 

    Gaitán Pitre, Jorge Elicer; Gasulla Forner, Manuel; Pallàs Areny, Ramon (2007-05-01)
    Text en actes de congrés
    Accés obert
    We present the theoretical analysis and experimental performance results of a direct interface for capacitive sensors based on the charge transfer method when parasitic capacitances are included. The interface circuit ...
  • EVEA: espai virtual d'electrònica analògica 

    Cuadras Tomàs, Àngel; Hornero Ocaña, Gemma; Serrano Finetti, Roberto Ernesto; Gasulla Forner, Manuel (2006-02)
    Text en actes de congrés
    Accés obert
    El projecte Espai Virtual d’Electrònica Analògica (EVEA) constitueix un entorn virtual, accessible des d’internet, que integra els continguts d’electrònica analògica presents en diferents assignatures de la titulació ...
  • Improving the efficiency of PV low-power processing circuits by selecting an optimal inductor current of the DC/DC converter 

    Reverter Cubarsí, Ferran; Gasulla Forner, Manuel (2014)
    Altres
    Accés obert
    In the context of autonomous sensors powered by small-size photovoltaic (PV) panels, this work analyses how the efficiency of DC/DC-converter-based power processing circuits can be improved by an appropriate selection of ...
  • Microcontroller-based interface circuit for inductive sensors 

    Kokolanski, Zivko; Jordana Barnils, José; Gasulla Forner, Manuel; Dimcev, Vladimir; Reverter Cubarsí, Ferran (2014)
    Altres
    Accés obert
    This work proposes a fully-digital interface circuit for the measurement of inductive sensors using a low-cost microcontroller (µC) and without any intermediate active circuit. Apart from the µC and the sensor, the circuit ...
  • Noniterative algorithms for electrical resistivity imaging applied to subsurface local anomalies 

    Gasulla Forner, Manuel; Pallàs Areny, Ramon (Institute of Electrical and Electronics Engineers, 2005-12)
    Article
    Accés obert
    In this paper, we compare five noniterative (one-step) algorithms for two-dimensional electrical resistivity imaging applied to the location of subsurface local anomalies. Here, we analyze the performance of two backprojection ...
  • Novel and low-cost temperature compensation technique for piezoresistive pressure sensors 

    Reverter Cubarsí, Ferran; Horak, Goran; Bilas, Vedran; Gasulla Forner, Manuel (2009)
    Comunicació de congrés
    Accés obert
    This paper proposes a low-cost technique to compensate for the temperature dependence of piezoresistive pressure sensors configured in a Wheatstone bridge. The sensor is treated as a resistive circuit and three equivalent ...
  • Obtención de imágenes de la distribución de impedancia eléctrica del subsuelo. Aplicación a la detección de objetos locales 

    Gasulla Forner, Manuel (Universitat Politècnica de Catalunya, 1999-04-09)
    Tesi
    Accés obert
    El objetivo de este trabajo es la obtención de imágenes de la distribución de impedancia eléctrica en el subsuelo a partir de medidas realizadas desde la superficie. El estudio se centra en la localización de objetos locales ...
  • Occupancy and belt detection in removable vehicle seats via inductive power transmission 

    Albesa Querol, Joan Miquel; Gasulla Forner, Manuel (2015-08)
    Article
    Accés obert
  • On the common mode response of fully differential circuits 

    Gasulla Forner, Manuel; Casas Piedrafita, Óscar; Pallàs Areny, Ramon (Institute of Electrical and Electronics Engineers, 2000)
    Text en actes de congrés
    Accés obert
    Differential circuits are often described by their differential gain and common mode rejection ratio (CMRR). This approach, however, neglects the effect that the common mode signal has on the transient response and stability ...
  • Optimal inductor current in boost DC/DC converters operating in burst mode under light-load conditions 

    Reverter Cubarsí, Ferran; Gasulla Forner, Manuel (2016-01-01)
    Article
    Accés obert
    This letter analyzes how the efficiency of boost dc/dc converters operating in burst mode under light-load conditions can be improved by an appropriate selection of the inductor current that transfers energy from the input ...
  • Power efficiency maximization of an RF energy harvester by fine-tuning an L-matching network and the load 

    Jordana Barnils, José; Reverter Cubarsí, Ferran; Gasulla Forner, Manuel (Elsevier, 2015)
    Comunicació de congrés
    Accés obert
    L-matching networks have been proposed for boosting the power efficiency of radiofrequency (RF) energy harvesters. This paper shows that power efficiency is maximized by fine-tuning the components of the L-matching network ...