Sensor with failure monitoring system

摘要

The sensor has a sensor surface (11) which is used to transmit or receive wireless signals. The sensor is transparent in the region of the sensor surface. An optical transmitter (6) and an optical receiver (7) are arranged in the sensor for monitoring the transparency in the region of the sensor surface. The sensor surface is a component of a transparent body (5) which may include edges (8) for light reflection. A monitoring circuit may be connected to the optical receiver for evaluating the signals it receives.