SENSOR ARRANGEMENT

• Main Authors: WIEGLEB, GERHARD, BENDICKS, NORBERT
• Format: Patent
• Language: English; German
• Published: 18.03.1992
• Edition: 5
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PERFORMING OPERATIONS; PHYSICS; SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, ORMANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR; TESTING; TRANSPORTING; VEHICLES IN GENERAL

A sensor arrangement for detecting the degree of wetting of a transparent plate, consisting in particular of glass, with droplet-shaped precipitation is proposed which is provided with a radiation guide element which is coupled to the plate, to which on the one hand a radiation transmitter and on the other hand a radiation receiver are assigned and which for the purpose of multiple reflection of the radiations emitted by the radiation transmitter has a reflection means. In such a sensor arrangement, the technical problem of reliably preventing the signal which is supplied by the radiation receiver and has a dependency on the amount of precipitation from being adversely affected by air humidity even in the case of relatively large temperature differences is to be solved. This is achieved in that the reflection means consists of a very thin material layer which is intimately connected to a surface of the radiation guide element extending parallel to the plate and preferably has a surface with a mirror finish.