System zur Türraumüberwachung eines Fahrzeugs

摘要

An evaluation device (22) responds to the distance signal of a distance sensor (12) to provide an output signal if the distance signal exceeds or falls short of a comparison value. A variable store (24) is provided for the comparison value and a compensating or balancing unit (30) is provided for the comparison value. The compensating unit is joined to the distance sensor and a signal generator (32) to store a signal of the sensor as the actual distance signal of the sensor as the comparison value in the store.