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Non-contact freezing temperature determination

  • US 8,838,407 B2
  • Filed: 08/10/2010
  • Issued: 09/16/2014
  • Est. Priority Date: 08/11/2009
  • Status: Active Grant
First Claim
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1. A method for determining the freezing temperature of an ice-water mixture on a road surface, comprising:

  • providing reference measurements of ice-to-water ratios in dependence on road temperatures for different salt contents of reference ice-water mixtures;

    determining an ice-to-water ratio of the ice-water mixture using a second sensor;

    detecting a temperature of the road surface using a first sensor;

    determining, by a computing unit, a salt content of the ice-water mixture from the determined ice-to-water ratio and the detected temperature by means of the provided reference measurements; and

    determining, by the computing unit, the freezing temperature of the ice-water mixture from the determined salt content and the provided reference measurements.

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