| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a tire power source supply system adapted to prevent current from being supplied wastefully to an electromagnet when the power source of an inner pressure alarm device is charged by the electromagnet and an electromagnetic coil. Ž<P>SOLUTION: The power source supply system includes: the electromagnet 51 disposed on a vehicle body side; a current supply control device 53 for supplying current to the electromagnet 51; the electromagnetic coil 50 disposed on a tire side; a power supply section 52 for supplying electromotive force obtained from the electromagnetic coil 50 by the magnetic force of the electromagnet 51 to the inner pressure alarm device 57 disposed on the tire side; and a sensor 1 for detecting the electromagnetic coil 50 when the tire is rotated. Based on power information transmitted from the inner pressure alarm device 57, the amount of current supplied to the electromagnet 51 is controlled. Based on the detection timing of the electromagnetic coil 51 by the sensor 1, current is supplied to the electromagnet 51 while the electromagnetic coil 50 passes through the vicinity of the electromagnet 51. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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