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Wheel information acquiring system

  • US 7,817,023 B2
  • Filed: 12/15/2005
  • Issued: 10/19/2010
  • Est. Priority Date: 12/15/2004
  • Status: Expired due to Fees
First Claim
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1. A wheel information acquiring system that is attached to a wheel and acquires wheel information of the wheel during rotation, the wheel information acquiring system comprising:

  • a first communication device that is attached to the wheel and detects wheel information associated with the wheel during rotation, and wirelessly transmits the detected wheel information from a wheel side; and

    a second communication device that is provided apart from the wheel and that receives and acquires the wheel information transmitted by the first communication device, wherein;

    the first communication device has a maximum value of rotation speed specified for the wheel during rotation to which the first communication device is attached; and

    when a transmission time width of one packet of the wheel information transmitted by the first communication device is represented by T1, and an expected minimum rotation period which is determined according to the maximum value of the rotation speed prespecified in the first communication device is represented by R1, the T1 is set so as to satisfy T1

    R1·

    ½

    , and whereinthe first communication device transmits, in addition to the wheel information, power supply voltage information of the first communication device.

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