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Instantaneous ice detection system

  • US 4,996,493 A
  • Filed: 08/21/1989
  • Issued: 02/26/1991
  • Est. Priority Date: 08/21/1989
  • Status: Expired due to Fees
First Claim
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1. Apparatus for the early detection of ice on an instantaneous basis on a surface comprising sensor means embedded in said surface, said sensor means comprising a block of non-conductive material containing a pair of spaced electrodes of conductive, metallic material and having surfaces contiguous with or elevated slightly above the surface of said block and the surrounding surface, means for measuring instantaneously the electrical resistance between said electrodes, means for measuring electrode temperature to indicate the temperature of said surface, and means responsive to said measuring means for producing a signal indicating instantaneously the presence of ice when both said electrode temperature and said resistance simultaneously undergo a discontinuity indicating the freezing of water.

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