| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire air pressure warning system transmitting and receiving an electric wave without an influence of the tire stopping state. SOLUTION: The tire air pressure warning device has: tire air pressure detection sensor units 3 attached to respective tire wheels 2; transmitting/receiving antennas 4 attached to the respective tire wheels and connected to the detection sensor units 3; transmitting/receiving antennas 5 arranged at positions corresponding to the respective tires 8 at a vehicle body side respectively; and a control unit for performing processing such as display of warning or the like based on air pressure information received by the transmitting/receiving antenna 5. The antenna 4 is wound over a half of circumference or more in a circumferential direction of a rim part 2a of the tire wheel 2 for transmitting the tire air pressure information detected by the air pressure sensor unit 3. COPYRIGHT: (C)2007,JPO&INPIT |
