摘要:
The invention relates to: - A method for estimating a level of noise affecting a sampled and digitized pulse signal, such a neural action potential signal; - A method for detecting signal pulses by thresholding, the threshold being determined by estimating a level of noise according to the first method; - A method for classifying thus-detected signals; - Devices, and more particularly implantable devices, for carrying-out said methods. The invention applies principally to the field of embedded signal processing for multiple electrode array implanted in a neural tissue such as a brain.
摘要:
Dispositif (1) pour estimer une pression artérielle d'un utilisateur, par une combinaison d'une modalité acoustique, mettant en œuvre des émetteurs et détecteurs acoustiques, et d'une modalité optique, mettant en œuvre des sources de lumière (15) et des photodétecteurs (18), formant des couples source-détecteur. Le dispositif comporte une unité de sélection acoustique (21), configurée pour déterminer le couple émetteur acoustique / détecteur acoustique pertinents, ainsi qu'une unité de sélection optique (22), configurée pour déterminer les couples source de lumière-photodétecteur pertinents. figure 1.
摘要:
The invention relates to a method for characterising the ocular activity of a person, using at least two electroencephalographic signals, each signal being delivered by an electrode positioned on the scalp of the person, comprising the steps of: - separation of the electroencephalographic signals into a plurality of sources of origin, said signals being modelled as a mixture of components each corresponding to a cerebral source of origin or to an artefactual source of origin; - identification and selection of at least one artefactual ocular source of origin among the separated sources, characterised in that it comprises a step of reconstructing at least one electro-encephalographic signal corresponding to said at least one selected artefactual ocular source of origin, and a step of determining information relating to ocular blinking using a reconstructed electroencephalographic signal.
摘要:
Procédé de détermination d'une pression artérielle d'un utilisateur, en mesurant un paramètre physiologique, le paramètre physiologique passant par un extremum lorsque la pression transmurale de l'artère est nulle, le procédé comportant: - a) application d'une pression sur l'artère, de façon à modifier la pression transmurale de l'artère; - b) mesure du paramètre physiologique de l'utilisateur à l'aide d'un capteur; - c) établissement d'une fonction de calibration, la fonction de calibration déterminant une relation entre la pression transmurale et le paramètre ; - d) application d'une pression sur l'artère, à un instant de mesure et mesure du paramètre physiologique à l'instant de mesure ; - e) estimation d'une pression transmurale à l'instant de mesure ; - f) à partir de la pression transmurale estimée lors de l'étape e) et de la pression appliquée à l'instant de mesure, estimation d'une pression artérielle de l'utilisateur.
摘要:
The invention relates to a system for detecting the walk of a person, provided with a housing (BT) including an at least biaxial motion sensor (CM), said housing being suitable for being attached to the upper part of the body of said person such that a first axis of measurement of said sensor (CM) coincides with the anteroposterior axis (AP) or the vertical axis (VT) of said body, and that a second axis of measurement of said sensor (CM) coincides with the medio-lateral axis (ML) of said body, said system additionally being provided with a means (MA) for analysing the measurements output by said sensor (CM), wherein said analysis means (MA) includes: a means (MT) for processing the measurement signals output by said sensor (CM) during a window of time, including a means for searching for a dominant frequency (MRFD) in said signals; and a means for detecting (MD) the walk of the person when a ratio between the dominant frequency of the signal of the first axis of measurement and the dominant frequency of said second axis of measurement, or between the dominant frequency of a Euclidean norm of the vector of measurements transmitted by said sensor (CM) and the dominant frequency of the signal of the second axis of measurement, is substantially equal to two.