| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a wheel position determination device that can determine a wheel position by an inexpensive constitution. <P>SOLUTION: In a tire state monitoring device, tire sensor units 3 attached to four wheels 2 and a spare tire sensor unit 9 attached to a spare tire are provided in a vehicle body. The spare tire sensor unit 9 can receive an RF signal, which is transmitted from each of the tire sensor units 3, by a transmission antenna 9a, and can transmit reception intensity to a receiver unit 4 from the transmission antenna 9a. The receiver unit 4 determines positions of the four tire sensor units 3 by determining reception intensity levels of the two RF signals including one of the RF signals determined by the spare tire sensor unit 9. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
