Conductive fabric sensor system

G - Physics – 01 – G

Patent

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Details

G01G 19/52 (2006.01) B60N 2/00 (2006.01) B60N 2/44 (2006.01) B60Q 11/00 (2006.01) G01G 7/06 (2006.01) G01G 19/44 (2006.01) G01L 1/14 (2006.01) G01L 1/20 (2006.01) B60R 21/01 (2006.01)

Patent

CA 2225945

A sensor for the seat of a motor vehicle includes a compressible, preferably foam layer disposed between two conductive sheets. In one embodiment, the capacitance between the conductive sheets is measured to determine what and whether an object is disposed on the sensor, while in another application, apertures are formed through the compressible layer to allow the conductive sheets to contact one another through the apertures. Embodiments having relatively low resistivity to produce a short circuit, and an embodiment having higher resistivity in which the magnitude of the change and resistance may be used to determine the nature of an object are described.

Capteur pour siège de véhicule à moteur, comprenant une couche compressible, préférablement en mousse, disposée entre deux feuilles conductibles. Dans une variante de l'invention, la capacitance entreles feuilles conductibles est mesurée afin de déterminer si un objet est posé sur le capteur, et le cas échéant, le type d'objet, tandis que dans une autre application, des ouvertures sont formées à travers la couche compressible afin de permettre aux feuilles conductibles de venir en contact les unes avec les autres, à travers les ouvertures. L'invention comporte des variantes ayant une résistivité relativement faible pour produire un court-circuit et une variante ayant une résistivité plus grande dans laquelle on peut faire intervenir la valeur du changement et la résistance pour déterminer la nature d'un objet.

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