| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire position determining system capable of accurately determining tire position in a short time period.SOLUTION: A tire air pressure transmission machine 4 transmits ID radio wave Spi with which it may be determined that the tire air pressure transmission machine 4 reaches peak in tire rotating direction to a TPMS reception machine 12. TPMS reception machine 12 acquires axle rotation information (counted pulse value) for both of axles 18a to 18d at that time when the tire air pressure transmission machine 4 reaches the peak position. This operation is executed by ID1 to ID4 and by the acquired peaks so that data group of axle rotation information (counted pulse value) required for determination of the tire position may be collected. In addition, statistics of axle rotation information (counted pulse value) for each of axle 18a to 18d by ID1 to ID4 is taken so that distribution of axle rotation information (counted pulse value) by ID1 to ID4 is calculated. The tire position is determined with the distribution. |
