Patent ID: 9555674
Date: 2017-01-31
CPC Classifications: B60C

Claim:
1. A vehicle wheel information acquiring device comprising: a vehicle wheel sensor that includes a sensor unit and a transmission unit, the sensor unit being fixed to a vehicle wheel and being configured to detect a vehicle wheel state quantity indicating a state of the vehicle wheel, the transmission unit being configured to transmit the vehicle wheel state quantity detected by the sensor unit at a predetermined timing using a radio signal, and the vehicle wheel sensor being configured to revolve around an axle with a rotation of the vehicle wheel; and a vehicle-body-side device that includes a reception unit, a processing unit, a rotation position acquiring unit, an on-reception rotation position storage unit, and a determination unit, the reception unit being fixed to a vehicle body and being configured to receive the radio signal transmitted from the vehicle wheel sensor, the processing unit being configured to acquire the vehicle wheel state quantity from the radio signal received by the reception unit and to perform a process corresponding to the vehicle wheel state quantity, the rotation position acquiring unit being configured to acquire a rotation position of the vehicle wheel, the on-reception rotation position storage unit being configured to store the rotation position of the vehicle wheel when the radio signal is received, and the determination unit being configured to determine whether a revolution position of the vehicle wheel sensor is included in an insufficient received intensity area based on the rotation position of the vehicle wheel when the radio signal is received during a stopping operation of a vehicle and a current rotation position of the vehicle wheel, wherein the insufficient received intensity area is a revolution position range of the vehicle wheel sensor in which the received intensity of the radio signal in the reception unit is insufficient.