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Apparatus and method for tire pressure measurement

  • US 6,626,035 B1
  • Filed: 02/21/2001
  • Issued: 09/30/2003
  • Est. Priority Date: 08/21/1998
  • Status: Expired due to Fees
First Claim
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1. An apparatus for determining inflation pressure of a pneumatic tire mounted on a wheel of a vehicle, the apparatus comprising:

  • (i) a support for supporting the tire such that the tire is in contact with the support over a contact area;

    (ii) a plurality of sensors within the support each for measuring the pressure applied to a respective surface area of the support and providing a respective output, each surface area being less than the contact area, and the surface areas being arranged so that at least one of the surface areas can be completely covered by the tire; and

    (iii) processing means for processing the outputs of the sensors (a) to select which of the sensors has a surface area that falls within the contact area and (b) to determine the inflation pressure of the tire to a first order of accuracy from the output or outputs of the selected sensor or sensors disregarding the output or outputs of the other sensor or sensors.

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