| 摘要 |
<p>PURPOSE:To enable the rational current application to an illumination lamp by attaching a Wiegand wire made of ferromagnetic material, which has an exterior layer on which permanent processing hardening treatment is applied and a relatively soft inside layer, to the spoke part of a wheel, and accumulating the output of a detection coil arranged close to the said wire. CONSTITUTION:Wiegand wires 12 made of ferromagnetic material, each of which has an exterior layer on which permanent processing hardening treatment is applied and a relatively soft inside layer, are attached by bonding, etc. to the spokes 11... of the wheel 10 of a bicycle, while a detection case 13 is arranged in the position adjacent to these wires 12, and this is fixed through an arm 17 to the car body 18. The detection case 13 stores permanent magnets 14 and 15, where the intensities of magnetic fields are different from each other, and a detection coil 16, and it generates the outputs 16' and 16'' with the rotation of the wheel 10 by the mutual action of the Wiegand wires 12, the permanent magnets 14 and 15, and the detection coil 16. And these outputs 16' and 16'' are accumulated upon being smoothed with an accumulating circuit 20, and by the output of this accumulating circuit 20, an illumination lamp 23 is lit.</p> |
