Sensor unit for detecting the wetting of a window
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United States of America Patent
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May 3, 2005
Grant Date -
May 1, 2003
app pub date -
Oct 28, 2002
filing date -
Oct 26, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a sensor unit for detecting the wetting of a window. Signals from the condensation sensor are used to control an air conditioning, heating, and/or ventilation unit. The signals of the rain sensor, on the contrary, are used to control a windshield wiper or washing unit for vehicles. A sensor unit, which comprises two sensors, is placed on the interior of the window. In a preferred variant, both are coupled to a common switchable evaluation unit, so that through mutual evaluation of the two sensors or their signals, both incipient condensation on the interior of a vehicle window and the wetting of the exterior, e.g., by rain, is detected. In an improvement of the invention, both sensors are integrated into a sensor module.
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