Continuously adaptive moisture sensor system for wiper control

  • US 4,916,374 A
  • Filed: 02/28/1989
  • Issued: 04/10/1990
  • Est. Priority Date: 02/28/1989
  • Status: Expired due to Term
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First Claim
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1. A wiper control for use with the window of a vehicle having a window and wiper means operative to remove moisture from a portion of said window, said wiper control comprising:

  • moisture sensing means responsive to the presence of moisture for producing a moisture signal representative of the amount of moisture present;

    reference signal generating means for generating a reference signal;

    comparison means responsive to said moisture signal and said reference signal for producing an output to the vehicle wiper means indicative of the relationship between said moisture signal and said reference signal; and

    wherein the improvement comprises said reference signal generating means being responsive to said moisture signal and including signal processing means for substantially continuously adapting said reference signal to said moisture signal at a faster rate during periods of decreasing sensed moisture than during periods of increasing sensed moisture.

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