Rain sensor
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The rain sensor is an optical sensor and consists of an optical element. An electronic component is also integrated. Apart from the evaluation electronics, three optical transmitter and receiver diodes are integrated in the electronic component. The transmit diodes and the receiver diodes function in the infrared range.
The rain sensor uses transmit and receiver diodes (infrared) to evaluate the degree of reflection from the windscreen. The grouping of transmit and receiver diodes in pairs creates measurement paths. The rain intensity is detected via the measurement paths.