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Pressure sensor mounting method, tire and wheel having pressure sensor, and tire pressure detection device

  • US 8,176,776 B2
  • Filed: 01/24/2007
  • Issued: 05/15/2012
  • Est. Priority Date: 01/30/2006
  • Status: Active Grant
First Claim
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1. A tire pressure detection system comprising:

  • a tire pressure detection device, mounted inside a tire of a vehicle, for detecting air pressure inside the tire; and

    a reader having a coil antenna having an opening surface directed to the tire, and mounted in a highest portion of a wheel housing of the vehicle,wherein the tire pressure detection device comprises;

    a pressure sensor for measuring the air pressure, using a displacement portion to be displaced according to the air pressure; and

    a circuit board having a response circuit mounted on a board surface thereof, the response circuit for sending, through interaction with a supply electromagnetic field applied from the reader, data measured by the pressure sensor to the reader,wherein;

    the pressure sensor is mounted on the circuit board such that a displacement direction of the displacement portion is set parallel to the board surface,the circuit board is attached on a tread portion of the tire or a rim portion of a wheel on which the tire is mounted, such that a displacement direction of the displacement portion is set parallel to a rotational axis of the tire, andthe response circuit has a coil all of which is formed as a wiring pattern on the board surface, and is electromagnetically coupled with the coil antenna to transmit the measured data.

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