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Sealed Capacitive Rain Sensor

  • US 20080265913A1
  • Filed: 09/06/2006
  • Published: 10/30/2008
  • Est. Priority Date: 09/06/2005
  • Status: Abandoned Application
First Claim
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1. A vehicular capacitive rain sensor deployed on an internal surface of a window, the sensor having a sensing region for detecting moisture on the external surface of the window for generating wipe commands applied to a wiper deployed for wiping the external surface, the sensor comprising:

  • (a) at least two electrodes disposed on said internal surface and constituting a capacitance, said at least two electrodes defining a sensing region on the external surface of the window within which the presence of water detectably affects said capacitance;

    (b) a housing arrangement cooperating with the internal surface of the window to enclose said electrodes, at least part of said housing arrangement being implemented as an electrostatic shield for shielding said electrodes; and

    (c) electrical interconnections passing into said housing arrangement;

    wherein said housing arrangement is configured to hermetically seal said electrodes so as to make said capacitance substantially insensitive to moisture adsorption.

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