SENSOR FOR DETECTING DIRT AND/OR RAIN AND METHOD FOR OPERATING A SENSOR

A sensor detects dirt and/or rain having a transmitter unit (12, 112) and at least one receiver unit (16, 116) as well as a test surface (22, 122), an accumulation (30, 32) on the test surface (22, 122) being detectable by a light beam (24, 26; 124, 126), which is emitted by the transmitter unit (12...

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Bibliographische Detailangaben
1. Verfasser:	MACK BERND
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PERFORMING OPERATIONS PHYSICS SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, ORMANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR TESTING TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	A sensor detects dirt and/or rain having a transmitter unit (12, 112) and at least one receiver unit (16, 116) as well as a test surface (22, 122), an accumulation (30, 32) on the test surface (22, 122) being detectable by a light beam (24, 26; 124, 126), which is emitted by the transmitter unit (12, 112) and absorbed by the receiver unit (16, 116). The transmitter unit (12, 112) has at least two transmitters (114), at least one of which comprises two or more locally closely adjacent transmission sources (114a, 114b, 114c, 114d), one receiver (18, 118) of the receiver unit (16, 116) being associated with each transmitter (114). The receiver (18, 118) have one or more individual receivers, at least one of the transmitters (114) being implemented for the purpose of emitting at least two different wavelengths, which are detectable by the associated receiver (18, 118).