Patent ID: 9584881
Date: 2017-02-28
CPC Classifications: B60C,H04Q

Claim:
1. A tire-pressure sensor unit comprises: a pneumatic sensor which detects a tire pressure, a transmitter which transmits wheel information that is information including tire-pressure information representing the tire pressure detected by said pneumatic sensor and a unique sensor ID as a radio signal, and a battery prepared as an internal electrical power source, and said tire-pressure sensor unit is fixed to and disposed in a wheel and circles around an axle shaft along with the rotation of said wheel, wherein; said tire-pressure sensor unit further comprises: a turning-position detection means to detect the turning position of said tire-pressure sensor unit around the axle shaft, a transmission control means to make said transmitter transmit said wheel information at the timing when the turning position detected by said turning-position detection means arrives at a transmission setting location, a transmission location setting means to calculate a turning position which is advanced or retarded a setting adjustment angle (Δα degree) set to a value (Δα) which is not a divisor of 360, with respect to the turning position when said wheel information is transmitted last time, and to set this turning position obtained by calculating as a transmission setting location for transmitting said wheel information next time.