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Capacitive pressure sensor

  • US 7,100,432 B2
  • Filed: 06/06/2002
  • Issued: 09/05/2006
  • Est. Priority Date: 06/06/2002
  • Status: Expired due to Term
First Claim
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1. A wheel, comprising:

  • a rim;

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

    a pressure sensor in said tire, wherein the pressure sensor is configured to sense the pressure of the gas within the cavity, said pressure sensor comprising;

    a first conductive layer;

    a compressible dielectric contiguous to said first conductive layer; and

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

    wherein said capacitor is adapted to reflect a capacitance in relation to pressure changes within the cavity; and

    wherein said pressure sensor further comprises a temperature compensating element associated with said capacitor.

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