Sensor arrangement for detecting moisture on a window
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United States of America Patent
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Jan 4, 2011
Grant Date -
Aug 28, 2008
app pub date -
Jan 22, 2008
filing date -
Jul 19, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An especially simple and economical moisture sensor with temperature compensation is provided. To this end, in addition to a measuring capacitor, a second capacitor is arranged on a window of a motor vehicle, wherein the second capacitor is not affected by the moisture and/or water droplets. For analysis, a differential measurement of the capacitances of the measuring capacitor and of the second capacitor is carried out, from which is determined a degree of wetting of the window not influenced by the window temperature.
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