Exploració per autor "Pallàs-Areny, Ramon"
Ara es mostren els items 52-71 de 127
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Detección del ritmo cardiaco midiendo bioimpedancia plantar con elecrodos capacitivos
Díaz, Delia H.; Casas Piedrafita, Óscar; Pallàs-Areny, Ramon (UNIVERSIDAD CARLOS III DE MADRID, 2010)
Text en actes de congrés
Accés restringit per política de l'editorialLas básculas de baño electrónicas son un medio sencillo y asequible para medir, además del peso corporal, el balistocardiograma (BCG) y a partir de él extraer el ritmo cardíaco, y estimar variaciones en el gasto cardíaco ... -
Direct interface for capacitive sensors based on the charge transfer method
Gaitán Pitre, Jorge Eliécer; Gasulla Forner, Manuel; Pallàs-Areny, Ramon (2007-05-01)
Text en actes de congrés
Accés obertWe 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 ... -
Direct pulse transit time measurement from an electronic weighing scale
Gómez Clapers, Joan; Casanella Alonso, Ramón; Pallàs-Areny, Ramon (2016)
Text en actes de congrés
Accés restringit per política de l'editorialA 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 ... -
Dispositivo y método para medir magnitudes eléctricas de sensores analógicos
Gaitán Pitre, Jorge Eliécer; Pallàs-Areny, Ramon (2014-11-07)
Altres
Accés restringit per acord de confidencialitatLa presente solicitud de patente tiene por objeto un dispositivo y método para medir magnitudes eléctricas de sensores analógicos, que 10 incorpora notables innovaciones y ventajas. La presente invención se refiere, en ... -
Do ventricular repolarization interval ratios depend on heart rate and should they be rate-corrected?
Alvarado Serrano, Carlos; Ramos Castro, Juan José; Pallàs-Areny, Ramon (Institute of Electrical and Electronics Engineers, 2003-09)
Text en actes de congrés
Accés obertQT interval decreases with increasing heart rate (HR), hence to define normal values of QT interval for different heart rates requires the application of a QT interval rate correction formula. However, the influence of HR ... -
Efecto de las capacidades parásitas a tierra en las medidas de impedancia eléctrica con dos terminales
Aliau Bonet, Carles; Pallàs-Areny, Ramon (2011)
Text en actes de congrés
Accés obert -
Efectos de la absorción dieléctrica en circuitos de transferencia de carga para sensores capacitivos
Pallàs-Areny, Ramon; Gaitán Pitre, Jorge Eliécer (2015)
Comunicació de congrés
Accés obertSe presenta un análisis experimental del efecto de la absorción dieléctrica en el condensador de referencia empleado en circuitos de interfaz entre sensores capacitivos y microcontrolador basados en la transferencia de ... -
Effects of interelectrode capacitance in water conductivity measurements with capacitive electrodes
Pallàs-Areny, Ramon; Aliau Bonet, Carles (2015)
Text en actes de congrés
Accés obert -
Effects of stray capacitance to ground in bipolar material impedance measurements based on direct-contact electrodes
Aliau Bonet, Carles; Pallàs-Areny, Ramon (2014-10-01)
Article
Accés restringit per política de l'editorialBipolar material impedance measurements are easier to implement than tetrapolar measurements but are more affected by electrode impedance. This effect can be reduced by measuring at a high-enough frequency albeit with the ... -
Effects of stray capacitance to ground in bipolar water impedance measurements based on capacitive electrodes
Pallàs-Areny, Ramon; Aliau Bonet, Carles (2015)
Text en actes de congrés
Accés obertLiquid impedance measurements based on capacitive (or contactless) electrodes Overcome electrode polarization problems but are affected by stray capacitance from the material being measured to ground, the same as measurements ... -
Effects of stray capacitance to ground in three electrode monopolar needle bioimpedance measurements
Kalvøy, Håvard; Aliau Bonet, Carles; Pallàs-Areny, Ramon; Martinsen, Ørjan G (Institute of Electrical and Electronics Engineers (IEEE), 2015)
Comunicació de congrés
Accés obertPositive phase angle is documented and analyzed in a three electrode monopolar needle measurement. Inductance equivalent behavior of the stray capacitance to ground is described as error source in a non-inductive sample ... -
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'editorialAtrial 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 ... -
Error analysis and reduction for a simple sensor-microcontroller interface
Custodio Ruiz, Ángel; Pallàs-Areny, Ramon; Bragós Bardia, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-12-31)
Article
Accés obertError analysis of a resistive sensor-to-microcontroller interface based on pulse-width modulation and time–ratio measurement shows that internal input and output resistances in microcontroller digital ports produce zero, ... -
Error analysis in two-terminal impedance measurements with residual correction
Torrents Dolz, Josep M.; Pallàs-Areny, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-10-31)
Article
Accés obertResidual impedance correction in impedance analyzers when using an asymmetrical test fixture needs three reference measurements, usually open circuit, short circuit, and load (meaning an impedance close to the impedance ... -
Generar coneixement a la Universitat
Pallàs-Areny, Ramon (Comunicación MetroBCN, 2022-05)
Article de premsa
Accés obertActualment molts joves creuen que la universitat és la continuació de l’institut. Empreses com Google, Facebook, Microsoft, Apple o AstraZeneca demanen doctors/es en ciències o enginyeria -
Heart and respiratory rate detection on a bathroom scale based on the ballistocardiogram and the continuous wavelet transform
Gilaberte Elvira, Sonia; Gómez Clapers, Joan; Casanella Alonso, Ramón; Pallàs-Areny, Ramon (2010)
Text en actes de congrés
Accés restringit per política de l'editorialBallistocardiography is a non-invasive technique that yields information about the cardiovascular system that is not available in other external signals such as the electrocardiogram (ECG). In the last years, several ... -
Heart rate detection from single-foot plantar bioimpedance measurements in a weighing scale
Díaz, Delia H.; Casas Piedrafita, Óscar; Pallàs-Areny, Ramon (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
Text en actes de congrés
Accés restringit per política de l'editorialElectronic bathroom scales are an easy-to-use, affordable mean to measure physiological parameters in addition to body weight. They have been proposed to obtain the ballistocardiogram (BCG) and derive from it the heart ... -
Impact of the mechanical interface on BCG signals obtained from electronic weighing scales
Casanella Alonso, Ramón; Gómez Clapers, Joan; Hernández Urrea, Marc; Pallàs-Areny, Ramon (2016)
Text en actes de congrés
Accés restringit per política de l'editorialThis 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 ... -
La Ingeniería electrónica y la medicina
Pallàs-Areny, Ramon (Escola Tècnica Superior d'Enginyers de Telecomunicació de Barcelona, 1997)
Article
Accés obert -
Interferencias capacitivas en circuitos de interfaz directa entre sensores capacitivos y microcontrolador
Gaitán Pitre, Jorge Eliécer; Pallàs-Areny, Ramon (2012)
Text en actes de congrés
Accés restringit per política de l'editorialSe presenta un análisis experimental del efecto de las interferencias capacitivas en dos circuitos de interfaz directa entre sensores capacitivos y microcontrolador, uno basado en la transferencia de carga (CT, charge ...