Patent ID: 7859393
Filing Date: 2010-12-28
Classification: B60C,H01Q

Abstract:
1. A tire sensor system in which a control unit disposed in a vehicle body and a sensor unit disposed inside a tire attached to the vehicle body are wirelessly connected, the tire sensor system comprising: a plurality of booster antennas embedded in the material constituting the tire; wherein the control unit generates a transmission electromagnetic field that varies with time and senses electromagnetic field fluctuations produced by the sensor unit; the sensor unit comprises: wherein the plurality of booster antennas constitutes secondary coil antennas lined up along a circumference of the tire, the plurality of booster antennas are arranged so that a coil face of a first booster antenna partially overlaps a coil face of a second booster antenna, the coil face of the second booster antenna partially overlaps the coil face of the first booster antenna and a coil face of a third booster antenna, and the coil face of the third booster antenna does not partially overlap the coil face of the first booster antenna, coil faces of the plurality of booster antennas are sequentially interlinked with each other via magnetic; coupling, and at least one of the plurality of booster antennas is directly magnetically coupled to the primary coil antenna.