Siemens Aktiengesellschaft

Uwe Ahlig

Manfred Glehr

Reiner Buchner

In order to identify the position of a movable element, such as a lock bolt, a resonant circuit is subjected to the element or a part that moves with the element. The resonant circuit is thereby damped by the element in a position-dependent manner and oscillates in one end position of the element but is damped too greatly in the other end position. A microprocessor controls the switching on and the respective operating point of a transistor in such a way that switching hysteresis is obtained. The operating point can be automatically readjusted in an adaptation phase.

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Maxhutte-Haidhof, Germany

Uwe Ahlig