The present invention relates to a rain sensor detecting the size of rain drops based on optical effects. The rain sensor is mounted on a first surface of a pane in order to detect the amount of moisture on an opposing second surface of the pane. The rain sensor comprises at least one emitter for emitting electromagnetic radiation, directed from the first surface to the second surface to form at least two rain-sensitive areas on the second surface At least one receiver is included for sensing radiation emitted by the emitter and that has been internally reflected at the rain-sensitive areas. The rain sensor generates an output signal indicative of an amount of moisture on the rain-sensitive area. A control unit calculates a minimal droplet size based on the output signal.


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    Title :

    Optical rain sensor and method for determining a minimal rain drop size


    Contributors:

    Publication date :

    2020-11-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G08B SIGNALLING OR CALLING SYSTEMS , Signalisier- oder Rufsysteme / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES



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