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CAPACITIVE PRESSURE SENSOR

  • US 20090027184A1
  • Filed: 09/30/2008
  • Published: 01/29/2009
  • Est. Priority Date: 06/06/2002
  • Status: Active Grant
First Claim
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1. A wheel, comprising:

  • a rim;

    a tire surrounding the rim and sealing a gas under pressure within a cavity formed by the tire and the rim; and

    a pressure sensor positioned within the cavity, wherein the pressure sensor is configured to sense the pressure of the gas within the cavity, and wherein the pressure sensor comprises;

    a first conductive layer;

    a compressible dielectric contiguous to the first conductive layer;

    a second conductive layer contiguous to the compressible dielectric, wherein the first and second conductive layers form a capacitor; and

    a temperature compensating element associated with the capacitor;

    wherein the capacitor is configured to vary a capacitance in response to pressure changes within the cavity.

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