Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1988-04-19
1989-08-22
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
318444, 318480, 318DIG2, 15250C, H02J 100, H02P 104
Patent
active
048598674
ABSTRACT:
The specification discloses a modulated optical moisture sensor control circuit for a vehicle windshield wiper. The control system includes a first detector providing a signal indicative of moisture on the windshield and a second detector providing a reference signal indicative of system variables, such as ambient light. The control system includes improved circuitry for separating the steady-state portion of each detector signal due to ambient light from the modulated infrared IR signal. The system further includes a sensitivity adjustment accessible by the vehicle operator to alter the sensitivity of the circuit to at least one of the two variable detector signals. Additionally, the control system cooperates with a conventional off/intermittent/on wiper switch so that the wiper is responsive to the moisture sensor only when the conventional switch is in the intermittent position and a second manually actuated switch indicates preferred operation in the moisture sensor mode.
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Pp. 328, 532, 533 and 534 from Siemen Opto Electronic Data Book, 1986.
Hanft Karl H.
Larson Mark L.
O'Farrell Desmond J.
Donnelly Corporation
Logan Sharon D.
Shoop Jr. William M.
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