| 摘要 |
PROBLEM TO BE SOLVED: To specify which tire transmission data is data of air pressure in, without performing a work for registering ID. SOLUTION: A magnet 4 is mounted on a vehicle main body 3 side. In each tire 2, a sensor part 1 for measuring air pressure and a proximity sensor 5 for generating a signal when the sensor 5 approaches to the magnet 4 are mounted. The signal of the proximity sensor 5 is transmitted by radio, together with data of air pressure. By changing arrangement patterns (number) of the magnet 4 for every arrangement position of each tire 2, signal patterns of the proximity sensors 5 are made different for each of the proximity sensors 5. COPYRIGHT: (C)2005,JPO&NCIPI
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