| 摘要 |
PURPOSE:To record the speed variation value of a driving system with high precision by comparing a reference pulse proportional to a speed reference value. CONSTITUTION:A frequency divider 15 which divides the frequency of the output of a fixed pulse oscillator 14 is controlled through a speed command input circuit 13 to output the reference pulses proportional to the speed reference value. The reference pulses and pulses corresponding to the speed of a driving motor 2 outputted by the pulse input circuit 5 are compared with each other by a coincidence erasing circuit 7 and an altenate pulse erasing circuit 8. Then, the counted value of a reversible counter 9 for output pulses of the circuit 8 in a specific time is converted from digital to analog and recorded on a recorder 11, thus recording the speed variation value of the driving system with high precision. |
