Method for controlling a capacitive anti-jamming system and anti-jamming system

摘要

The present invention relates in particular to methods for controlling a capacitive anti-trap system of a vehicle, such as a tailgate (1) of a motor vehicle (K), with at least two transmitting electrodes (S1, S2) and a receiving electrode (E) of the capacitive one for detecting an obstacle Anti-trap protection system are used and an electric field is generated by a pair of transmitting electrodes (S1, S2) and receiving electrode (E) by driving the respective transmitting electrode (S1, S2) with electrical alternating current, which is influenced by an obstacle such that an electrical capacitance is measurably changed, - a changing electrical capacitance can be determined on the basis of a signal received via the receiving electrode (E) and this signal is evaluated by means of an electronic evaluation unit (5, 5 ') at least when the vehicle closing element (1) is closed, in order to determine the presence of a Obstacle in the adjustment path of the vehicle ug closing element (1), and - the at least two transmitter electrodes (S1, S2) are spatially spaced from one another, preferably on the vehicle closing element (1), so that with the at least one receiving electrode (E) an electrical field that can be influenced by an obstacle is in generate two different monitoring areas. According to the invention, it can be provided, inter alia, that the two spatially spaced transmitting electrodes (S1, S2) are controlled simultaneously with electrical alternating current in such a way that the electronic evaluation unit (5, 5 ') can be used to evaluate whether a signal is being received in a single signal there is an obstacle in the two surveillance areas. In addition, a method is proposed in which the two transmission electrodes (S1, S2) can be operated in two different operating modes, and a capacitive anti-trap system that is particularly suitable for carrying out a method according to the invention.