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1. (WO2009026912) CAPACITIVE ANTI-PINCH MEANS AND METHOD FOR OPERATING AN ANTI-PINCH MEANS

Pub. No.:    WO/2009/026912    International Application No.:    PCT/DE2008/001436
Publication Date: Fri Mar 06 00:59:59 CET 2009 International Filing Date: Tue Sep 02 01:59:59 CEST 2008
IPC: H03K 17/955
E05F 15/00
Applicants: MICRO-EPSILON MESSTECHNIK GMBH & CO. KG
WISSPEINTNER, Karl
REINDL, Norbert
Inventors: WISSPEINTNER, Karl
REINDL, Norbert
Title: CAPACITIVE ANTI-PINCH MEANS AND METHOD FOR OPERATING AN ANTI-PINCH MEANS
Abstract:
A capacitive anti-pinch means with a first electrode (2) and a second electrode (3), wherein the first electrode (2) and the second electrode (3) form the electrodes of one sensor, is, as regards a measurement which is independent of a ground potential (M1), characterized in that the first electrode (2) can be fed a first potential (Uref+), in that the second electrode (3) can be fed a second potential (Uref-), wherein the second potential (Uref-) is different from the first potential (Uref+), and in that said means are equipped with evaluation electronics (5) which determine the difference between the first potential (Uref+) and the second potential (Uref-) and determine the capacitance (CSensor) of the sensor from said difference. A corresponding method for operating the anti-pinch means (1) is disclosed.