In a wheel position detection apparatus, a first control unit (23) of a transmitter (2) repeatedly transmits a frame including unique identification information at the timing when the angle of the transmitter (2) is at a predetermined angle. A second control unit (33) of a receiver (3) receives the frame transmitted from the transmitter (2), and identifies which of a plurality of wheels (5a to 5d) the transmitter (2) that has transmitted the frame is attached to. The receiver (3) modifies an allowable variation range in accordance with a road surface condition expressed by the degree of road surface roughness each time the frame is received, and sets the allowable variation range wider for a rough road surface than for a smooth road surface.


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    Title :

    Wheel position detection apparatus, and tire air pressure detection apparatus having same


    Contributors:

    Publication date :

    2015-04-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60C VEHICLE TYRES , Fahrzeugreifen / G01L Messen von Kraft, mechanischer Spannung, Drehmoment, Arbeit, mechanischer Leistung, mechanischem Wirkungsgrad oder des Drucks von Fluiden , MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE




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