| 摘要 |
PURPOSE:To eliminate the external noise or the interference given from other channels for the signal transmission between the substances having the relative motion, by using the optical pulse signal. Thus the good signal transmission is ensured. CONSTITUTION:With application of input signals Si1, Si2 and Si3 to VF converting circuit 15, the corresponding pulse signals are delivered to light up LEDs 14a-14c. On the other hand, phototransistors 24a-24c receive the light reception amount of more than the fixed value at all times regardless of the turning of shaft 11, and each output of transistors 24a-24c is demodulated at FV converting circuit 25. Thus outputs S01, S02 and S03 which are equal to the original signal are obtained. In such way, the signal transfer can be carried out smoothly for the signals under the relative motion between shaft 11 and still axle 21. |
