| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of a communication failure caused by cross talk or reverse cross talk in a tire monitoring system of a vehicle. SOLUTION: When reading tire information by transmitting a seizing signal to a sensor of each tire, either of high output transmission processing (steps S1, S2) for transmitting the seizing signal with a predetermined output so that the sensor can be received even if the reception sensitivity of the sensor is the worst, or low output transmission processing (steps S4, S5) for transmitting the seizing signal with the output lower than the predetermined output is executed first. When a replay from the sensor corresponding to the execution is not appropriately received, the rest of the transmission processing is executed. In each of the transmission processing, an interfering wave is received from an initiator corresponding to the other tire (steps S2, S5) so that the cross talk in which the sensor of the other adjacent tire receives the seizing signal does not occur. The size of the output of the interfering wave is made to be a value corresponding to the size of the output of the seizing signal. COPYRIGHT: (C)2011,JPO&INPIT |
