| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire condition monitoring system capable of securely receiving data transmitted from a wheel side communication device by a vehicle body side communication device even when running at high speed. SOLUTION: This tire condition monitoring system is provided with wheel side communication means 11 to 14 provided with vehicle speed detection means 40, 41 to 44, tire condition detection means 11b to 14b, and wheel side control means 11c to 14c, vehicle body side communication means 21 to 24, and a vehicle body side control means 30. The wheel side control means 11c to 14c set length of transmission frame to first data length and the number of transmission of the transmission frame to first predetermined number when running speed of a vehicle detected by the vehicle speed detection means 40, 41 to 44 is less than predetermined speed and set length of the transmission frame to second data length shorter than first data length and the number of transmission of the transmission frame to second predetermied number larger than the first predetermined number when running speed of the vehicle detected by the vehicle speed detection means 40, 41 to 44 is above predetermined speed. COPYRIGHT: (C)2006,JPO&NCIPI |
