Capacitive coupled moisture sensor

Details Capacitive coupled moisture sensor Capacitive coupled moisture sensor

G - Physics

01

N

342/29.31, 324/2

G01N 27/22 (2006.01) H01G 7/00 (2006.01) H01G 5/22 (1990.01)

Patent

CA 1310692

Abstract A rain sensor for a windshield having two sets of electro- conductive coatings on opposing major surfaces of the outer glass ply of a windshield. The first set of coatings on the outer major surface of the ply are electrically insulated from but in close proximity to each other. The second set of electroconductive coatings are positioned within the windshield between the glass plies and are electrically connected to a signal generator and receiver. Water contacting the outer surface of the glass ply changes the nature of an electrical signal passing through the first pair of electroconductive coatings. In response to the altered signal, a controller actuates a windshield wiper arrangement to clear the viewing area of the windshield.

583669

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