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1. (WO2011154469) CAPACITIVE MEASUREMENT SYSTEM WITH SEAT HEATER INFLUENCE COMPENSATION

Pub. No.:    WO/2011/154469    International Application No.:    PCT/EP2011/059541
Publication Date: Dec 15, 2011 International Filing Date: Jun 8, 2011
IPC: H03K 17/955
B60R 21/015
B60N 2/00
Applicants: IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A.
LAMESCH, Laurent
VIRNICH, Michael
HOYER, David
Inventors: LAMESCH, Laurent
VIRNICH, Michael
HOYER, David
Title: CAPACITIVE MEASUREMENT SYSTEM WITH SEAT HEATER INFLUENCE COMPENSATION
Abstract:
The present invention proposes to compensate the effect of the seat heater by either direct measurement of the current coupled into the seat heater or by indirect compensation by introducing an additional electrode into the system. This additional electrode, subsequently referred to as 'compensation electrode', may be integrated into the capacitive measurement system in such a way, that the capacitance between the sense electrode and this compensation electrode is subject to the same relative variations as the capacitance between the sense electrode and the seat heater.