| 摘要 |
PROBLEM TO BE SOLVED: To detect to which wheel each transmitter is mounted even if ID information is not used. SOLUTION: A noise receiver for receiving noise from a noise generation source is provided on the transmitter 2 and it is detected at control part to which of front wheels 5a, 5b and rear wheels 5c, 5d of the four wheels 5a-5d the transmitter is mounted in response to a level of the noise received by the noise receiver. Since the level of the noise received by the noise receiver is varied in response to a distance from the noise generation source to the transmitter 2, it is determined to which of the front wheels 5a, 5b and the rear wheels 5c, 5d of the four wheels 5a-5d the transmitter 2 is mounted based on the level of the noise. COPYRIGHT: (C)2006,JPO&NCIPI
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