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TIRE INFLATION PRESSURE DETECTION SYSTEM

  • US 20090237228A1
  • Filed: 03/19/2009
  • Published: 09/24/2009
  • Est. Priority Date: 03/19/2008
  • Status: Active Grant
First Claim
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1. A tire inflation pressure detection system comprising:

  • transceivers disposed on a plurality of wheels including respective tires, each of the transceivers including a receiving unit that receives a triggering signal with a received strength, a first control unit that processes a frame by obtaining received strength data associated with the received strength of the triggering signal, and placing the received strength data in the frame, the frame having ID information associated with the each of the transceivers appended thereto, and a transmitting unit that transmits the frame processed by the first control unit;

    trigger machines disposed on a vehicle body and outputting the triggering signal; and

    a receiver disposed on the vehicle body and including a receiving unit that receives the frame, and a second control unit that decides, based on the received strength obtained from the received strength data contained in the frame, to which of the plurality of wheels the each of transceivers is attached, wherein;

    the second control unit includes an ID registration means that automatically registers the ID information of the transceiver of a subject vehicle; and

    the ID registration means includes a trigger output means for causing the triggering signal to be output from the trigger machines at an ID registration time;

    a collecting means for collecting received strength data elements in relation to the each of the transceivers on the basis of the ID information appended to the frame when the frame is received;

    a degree-of-variance arithmetic means for computing a degree of a variance among the received strength data elements collected by the collecting means; and

    a deciding means for recognizing which of the each of the transceivers associated with the ID information are associated with the subject vehicle when a degree of a variance computed by the degree-of-variance arithmetic means is smaller than a threshold, and for registering the ID information of the each of the transceivers with the subject vehicle when the ID information is recognized.

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