A system and a method for processing a signal from an...

G - Physics – 05 – B

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G05B 19/042 (2006.01) G05B 23/02 (2006.01) H03K 17/96 (2006.01)

Patent

CA 2682970

The present invention relates to a system for processing a signal (U) from an electric device (10), e.g. a touch sensitive key. The system comprises a reference value (Uref) for the signal (U), wherein said reference value (Uref) is continuously updated, and an arithmetic unit for determining a difference value (.DELTA.U) between the signal (U) and the reference value (Uref), so that difference value (.DELTA.U) corresponds with a change of the signal (U). The system comprises further a spectrum of the possible difference values (.DELTA.U), wherein said spectrum is subdivided into ranges (21, 23, 25, 27, 29, 31, 33, 35, 37, 39) corresponding with possible causations for the change of the signal (U) in said system. Additionally, the system comprises a comparing unit for associating the difference value (.DELTA.U) with the corresponding range (21, 23, 25, 27, 29, 31, 33, 35, 37, 39) of the spectrum and for identifying, if the difference value (.DELTA.U) results from a disturbance or from a relevant change in the electric device (10). Further, the present invention relates to a corresponding method.

La présente invention porte sur un système pour traiter un signal (U) provenant d'un dispositif électrique (10), par exemple une touche sensible au touché. Le système comprend une valeur de référence (Uref) pour le signal (U), ladite valeur de référence (Uref) étant mise à jour en continu, et une unité arithmétique pour déterminer une valeur de différence (DU) entre le signal (U) et la valeur de référence (Uref), de telle sorte que la valeur de différence (DU) correspond à un changement du signal (U). Le système comprend en outre un spectre de différentes valeurs possibles (DU), ledit spectre étant sous-divisé en plages (21, 23, 25, 27, 29, 31, 33, 35, 37, 39) correspondant à de possibles causalités pour le changement du signal (U) dans ledit système. De plus, le système comprend une unité de comparaison pour associer la valeur de différence (DU) à la plage correspondante (21, 23, 25, 27, 29, 31, 33, 35, 37, 39) du spectre et pour identifier si la valeur de différence (DU) résulte d'une perturbation ou d'un changement pertinent dans le dispositif électrique (10). En outre, la présente invention porte sur un procédé correspondant.

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