Now showing items 1-20 of 55

    • A comprehensive model for power line interference in biopotential measurements 

      Fernández Chimeno, Mireya; Pallàs-Areny, Ramon (Institute of Electrical and Electronics Engineers, 2000-06-30)
      Article
      Open Access
      Power line interference is a major problem in high-resolution biopotential measurements. Because interference coupling is mostly capacitive, shielding electrode leads and a high common-mode rejection ratio (CMRR) are ...
    • A fast method to estimate body capacitance to ground at mid frequencies 

      Aliau Bonet, Carles; Pallàs-Areny, Ramon (University of Oslo, 2015-12-18)
      Article
      Open Access
      Impedance measurements that involve the human body are affected by the capacitance between the body and earth ground. This paper describes a fast method to estimate that apacitance at 10 kHz, which is valid for impedance ...
    • A model to explain the TSDC spectrum of XLPE insulation in mid voltage cables based on a virtual electrode 

      Belana Punseti, Juan; Diego Vives, José Antonio; Orrit Prat, Jordi; Mudarra López, Miguel (2007)
      Conference lecture
      Open Access
      The analysis by TSDC of a large variety of cables subjected to long annealing times, has resulted in spectra that sometimes show an oscillation of the current peak observed at 99°C. This process has been observed in some ...
    • A novel fully differential biopotential amplifier with DC suppression 

      Spinelli, Enrique M.; Martínez, Nolberto; Mayosky, Miguel Ángel; Pallàs-Areny, Ramon (Institute of Electrical and Electronics Engineers, 2004-08)
      Article
      Open Access
      Fully differential amplifiers yield large differential gains and also high common mode rejection ratio (CMRR), provided they do not include any unmatched grounded component. In biopotential measurements, however, the ...
    • A practical approach to electrode-skin impedance unbalance measurement 

      Spinelli, Enrique M.; Mayosky, Miguel Ángel; Pallàs-Areny, Ramon (Institute of Electrical and Electronics Engineers, 2006-07)
      Article
      Open Access
      Unbalance between electrode-skin impedances is a major problem in biopotential recordings, leading to increased power-line interference. This paper proposes a simple, direct method to measure that unbalance at power-line ...
    • AC-coupled front-end for biopotential measurements 

      Spinelli, Enrique M.; Mayosky, Miguel Ángel; Pallàs-Areny, Ramon (Institute of Electrical and Electronics Engineers, 2003-03)
      Article
      Open Access
      AC coupling is essential in biopotential measurements. Electrode offset potentials can be several orders of magnitude larger than the amplitudes of the biological signals of interest, thus limiting the admissible gain of ...
    • Analysis of capacitance to ground formulas for different high-voltage electrodes 

      Riba Ruiz, Jordi-Roger; Capelli, Francesca (2018-01-01)
      Article
      Open Access
      Stray capacitance can seriously affect the behavior of high-voltage devices, including voltage dividers, insulator strings, modular power supplies, or measuring instruments, among others. Therefore its effects must be ...
    • Analysis of electrode arrays for multichannel surface electromyography 

      Pérez Obiols, Eduard (Universitat Politècnica de Catalunya, 2019-05)
      Master thesis
      Open Access
      Nowadays medical evaluation requires in each further step improvements in all the areas concerning engineering and materials. This applies to the application of electromyography and in specific to surface electromyography ...
    • Analysis of time delay between bioimpedance and respiratory volume signals under inspiratory loaded breathing 

      Blanco Almazán, María Dolores; Groenendaal, Willemijn; Catthoor, Francky; Jané Campos, Raimon (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference lecture
      Open Access
      Bioimpedance is known for its linear relation with volume during normal breathing. For that reason, bioimpedance can be used as a noninvasive and comfortable technique for measuring respiration. The goal of this study is ...
    • 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 ...
    • Comparison of silver-plated nylon (Ag/PA66) e-textile and Ag/AgCl electrodes for bioelectrical impedance analysis (BIA) 

      Logothetis, Irini; Gil Galí, Ignacio; Wang, Xungai; Razal, Joselito (Institute of Physics (IOP), 2021-05-01)
      Article
      Open Access
      Recently, researchers have adapted Bioelectrical Impedance Analysis (BIA) as a new approach to objectively monitor wounds. They have indicated various BIA parameters associated to specific wound types can be linked to wound ...
    • Consideraciones sobre la denominación de los electrodos para señales bioeléctricas externas 

      Díaz Cerecedo, Delia; Luna Lozano, P. S.; Casas Piedrafita, Óscar; Pallàs-Areny, Ramon (2012)
      Conference lecture
      Open Access
    • Construcción de un film polimérico basado en ácido poliglutámico y nanopartículas de polímeros conductores para la obtención de sensores electroquímicos 

      Domínguez Hervella, Eva (Universitat Politècnica de Catalunya, 2018-07-02)
      Bachelor thesis
      Open Access
      En este trabajo se preparó un electrodo biocompatible, electroactivo y flexible a partir de una matriz de bio-hidrogel, el ácido ɣ-poliglutámico (ɣ-PGA), y nanopartículas de poli 3,4-etilendioxitiofeno) (PEDOT), un ...
    • Design and fabrication of a dry eeg electrode 

      Marzo i Vila, Eduard (Universitat Politècnica de Catalunya, 2019-07-31)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Institut national des sciences appliquées de Lyon
      Nowadays EEG signal is the most utilized non-invasive brain data acquisition, because of its portability, low cost in relation with other techniques and ease to obtain brain waves. In order to obtain this signal, electrodes ...
    • Design and implementation of an organic semi-transparent photovoltaic device 

      Puig Ribas, Jordi (Universitat Politècnica de Catalunya, 2016-06)
      Bachelor thesis
      Open Access
      Organic polymeric solar cells require thin absorber layers due to intrinsic low exciton diffusion distances, thus showing low absorption of light. They are also characterized by having a low absorption peak, whose position ...
    • Detection of movements with attention or distraction to the motor task during robot-assisted passive movements of the upper limb 

      Antelis, Javier M.; Montesano, Luis; Giralt Ludevid, Xavier; Casals Gelpi, Alicia; Minguez, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Conference report
      Restricted access - publisher's policy
      Robot-assisted rehabilitation therapies usually focus on physical aspects rather than on cognitive factors. However, cognitive aspects such as attention, motivation, and engagement play a critical role in motor learning ...
    • Development and impedimetric evaluation of a magnetic interdigitated microelectrode 

      Sánchez Terrones, Benjamin; Vega Bru, Didac; Rodríguez Martínez, Ángel; Bragós Bardia, Ramon; Marco Colas, María Pilar; Valera Cano, Enrique Andrés (2014-11-01)
      Article
      Restricted access - publisher's policy
      A magnetic interdigitated microelectrode (m-ID mu E) has been developed, characterized and evaluated. In order to demonstrate the potential use of these electrodes in the biosensors field, impedimetric measurements of ...
    • Direct pulse transit time measurement from an electronic weighing scale 

      Gómez Clapers, Joan; Casanella Alonso, Ramón; Pallàs-Areny, Ramon (2016)
      Conference report
      Restricted access - publisher's policy
      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 ...
    • Diseño de un cambiador de electrodos de una pinza de soldadura móvil 

      Peirotén Le Moal, Julien (Universitat Politècnica de Catalunya, 2017-05-21)
      Bachelor thesis
      Restricted access - author's decision
      El objetivo de este proyecto es el de diseñar la parte mecánica de un cambiador de electrodos automático, donde un robot de 6 ejes dotado de una pinza de soldadura móvil, pueda intercambiar los electrodos utilitzados en ...
    • Diseño, caracterización y evaluación de electrodos capacitivos para la medida de ECG y EEG 

      Biarnés Rabella, Clara (Universitat Politècnica de Catalunya, 2018-10-23)
      Bachelor thesis
      Open Access
      Este trabajo consiste en el diseño de unos electrodos capacitivos para poder medir el ECG y EEG mediante un método lo menos invasivo posible. En la memoria se encuentra una descripción detallada de los cálculos realizados ...