| 摘要 |
PURPOSE:To obtain many different position signals with permanent magnet having different levels of magnetic force by comparing the output voltage that detected the permanent magnet set on a drive path with the output voltage in accordance with the driving speed of a motor-driven main body. CONSTITUTION:A motor-driven main body 1 contains a drive wheel 2 and a guide wheel 3, and a drive motor 4 and an angle control motor 5 are driven and controlled by drive circuits 6 and 7. A control circuit means 8 containing the 1st detection means 9 for a guide line is controlled along this line. Then a detection coil means 13 is provided for detection of a permanent magnet 14 set on the surface of the guide line. While a speed voltage generating means 19 detects the voltage corresponding to the drive speed of the main body 1. This detected voltage is supplied to a control circuit means 8 via a waveform processing circuit 17, etc. Then the detected output voltage of the magnet 14 is compared with the speed output voltage. Thus the magnet 14 can be detected with dependence on its magnetic force. This attains the accurate drive control of the main body 1 with the magnet 14 having different levels of magnetic force. |
