Supervisory apparatus for sensors, particularly ultra sonic sensors for supervising reversing vehicles.

摘要

Stringent requirements are set with respect to the operating reliability of a device for supervising reversing motor vehicles, for which reason the satisfactory functioning must be tested. A distance measuring device whose functioning is constantly tested during operation is known. However, a reflector (9) is permanently installed here as a test object, which impedes the transmission of sound and thus influences the measurement of the distance of the object.
For test purposes, an element which influences the sensor in a predetermined manner is introduced into the detection range. This can be for example the lid (9) of the housing (8) in which the sensor (1) is mounted. The monitoring device can be applied in particular in ultrasonic sensors for devices for monitoring reversing vehicles.