| 摘要 |
PURPOSE:To control simultaneously equipments installed at both ends of a transmission medium by using a pulse having the same waveform as that of a control signal so as to measure a time reciprocating the transmission medium prior to the production of the control signal and setting a time being a half the reciprocating time for a delay circuit. CONSTITUTION:A 1st pulse is generated at first by the pulse generator 1 and the 1st pulse reaches a pulse generator 4 through a transmission medium 13 and the pulse generator 4 generates a 2nd pulse. Then the time of the 2nd pulse reaching a counter 5 through the medium 13 is counted by the counter 5 and a half the count of the counter 5 is set as the delay time of the delay circuit 6. In generating the 1st pulse from the pulse generator 1 as the control signal of the devices 7, 8, the 1st pulse is subject to delay by the delay circuit 6 and the output of the delay circuit 6 activates the device 7. Then the 1st pulse as the control signal activates the device 8 through the medium 13. Thus, the time of the device 7 to be operated and the time for the device 8 to be operated are nearly equal to each other and the arrival time difference of the control signal is made within 0.5ms sufficiently. |
