Exploració per autor "Pallàs-Areny, Ramon"
Ara es mostren els items 57-76 de 127
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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 ... -
Journal of Electrical Bioimpedance
Pallàs-Areny, Ramon (University of Oslo, 2018-07-30)
Article
Accés obert -
Low-cost method to estimate body capacitance to ground at mid frequencies
Aliau Bonet, Carles; Pallàs-Areny, Ramon (2014)
Text en actes de congrés
Accés restringit per política de l'editorialImpedance measurements that involve the human body are affected by the capacitance between the body and earth ground. This paper describes a low-cost method to estimate that capacitance that can be applied to impedance ... -
Measurement of three independent components in impedance sensors using a single square wave
Lario García, Javier; Pallàs-Areny, Ramon (Elsevier, 2003-12-17)
Article
Accés obertTwo-wire impedance-based sensors involving electrolytes add the impedance of the electrodes to the electrical impedance of the medium to measure. An equivalent circuit for the measured impedance is a resistance in series ... -
Method and apparatus for obtaining cardiovascular information by measuring between two extremities
Pallàs-Areny, Ramon; Casanella Alonso, Ramón; Gómez Clapers, Joan (2014-06-04)
Report de recerca
Accés obertIn 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 ... -
Microphonics in biopotential measurements with capacitive electrodes
Luna Lozano, P. S.; Pallàs-Areny, Ramon (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
Comunicació de congrés
Accés obertBiopotential measurements with capacitive electrodes do not need any direct contact between electrode and skin, which saves the time devoted to expose and prepare the contact area when measuring with conductive electrodes. ...