| 摘要 |
PROBLEM TO BE SOLVED: To efficiently acquire wheel state information from a wheel state detection unit fitted to a wheel. SOLUTION: A trigger signal transmitter 22 is mounted on a vehicle body 12, and transmits trigger signals by radio. Based on the quantity of times of the receipt of the trigger signal, each of the wheel state detection units 16 transmits a wheel state information to the vehicle body side receiver 18. Each of the wheel state detection units 16 holds the quantity of settings so allocated as to be different from each other in a storage part. When the quantity of the receipt of the trigger signal within a predetermined time is equal to the quantity of settings, it transmits the wheel state information. COPYRIGHT: (C)2008,JPO&INPIT
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