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Apparatus and method for measuring a tire pressure from the tire footprint

  • US 8,833,152 B2
  • Filed: 07/11/2011
  • Issued: 09/16/2014
  • Est. Priority Date: 07/09/2010
  • Status: Active Grant
First Claim
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1. An apparatus for measuring the tire pressure of a tire provided on a moving vehicle, comprising:

  • measuring means which are provided on an underlying surface so as to interact with a tire for generating, in reaction to the tire traveling over said measuring means, a measurement signal which is evaluated electronically;

    evaluation means for receiving the measurement signal and outputting a tire pressure signal which corresponds to the tire pressure; and

    the measuring means has optical recording means for detecting a tire width as a footprint width of a footprint of the tire which is formed as it travels over the underlying surface, and the evaluation means is designed to determine a footprint length of the footprint from a sequence of tire width data items generated by the optical recording means and/or from a profile of a pressure measurement signal generated by the measuring means, to determine the tire pressure from a footprint area acquired by the (1) footprint length, (2) footprint width and (3) a force acting on the footprint area through the tire.

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