A lens receives light from an emitting element and guides the light reflected on an outer surface of a windshield toward a receiving element. Arithmetic processing is to acquire, as a sensor output signal, a difference between a light receiving value of the receiving element before or after an emission timing of pulsed light and a light receiving value at the emission timing. Comparison processing is to determine that the present value is normal and to use the present value as the sensor output signal when a difference between a previous value and a present value of the sensor output signal is less than a threshold. The comparison processing is to determine that the present value is abnormal and not to use the present value for controlling a wiper device when the difference is greater than or equal to the abnormality threshold.


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    Titel :

    RAIN SENSOR


    Beteiligte:

    Erscheinungsdatum :

    23.08.2018


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    G01J Messen der Intensität, der Geschwindigkeit, der spektralen Zusammensetzung, der Polarisation, der Phase oder der Pulscharakteristik von infrarotem, sichtbarem oder ultraviolettem Licht , MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT / G01V Geophysik , GEOPHYSICS / 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



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