| 摘要 |
<p>[Problem] To improve a sensing device in which a detection coil (4) is disposed in the vicinity of a composite magnetic body (3) that has been processed such that a large Barkhausen jump phenomenon is generated, and to enable a detection signal from the sensing device to be transmitted, without the need for an external power source, to a remote location. [Solution] The present invention is provided with: a circuit (14) which counts electrical pulses generated in a detection coil (4); a wireless unit (15) which inputs the counted information; and a rectifier/storage circuit (16) which supplies power to the counting circuit (14) and the wireless unit (15), said power being obtained by rectifying one portion of the electrical pulses. Signal components in the electrical pulses are sent to a micro controller unit (14), counted, and analysed. Energy components are supplied as the power source of the micro controller unit (14) and the wireless unit (15) after being processed by the rectifier/storage circuit (16).</p> |
