Window capacitive moisture sensor

Details Window capacitive moisture sensor Window capacitive moisture sensor

1996-03-29

1998-05-12

Elms, Richard T.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

521712, 219203, H05B 102

Patent

active

057510717

ABSTRACT:
An apparatus for sensing condensed moisture on the inside of automotive windows with essentially no sensitivity to precipitation on the outside of the window. The apparatus senses the influence of the moisture on the impedance (mainly capacitive) between two electrodes. It is intended especially for rear windows where the sensing electrodes can be integrated with the resistive heater network printed on the internal side and activate it automatically. Similarly it can be used for front windows where it can automate the operation of electrical or hot-air defoggers.

REFERENCES:
patent: 4032745 (1977-06-01), Roselli
patent: 4196338 (1980-04-01), Edel
patent: 4520258 (1985-05-01), Grohmann
patent: 4805070 (1989-02-01), Koontz et al.

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