| 摘要 |
PURPOSE:To control the number of revolutions with high precision by a simple structure by correcting a plural sets of number of revolutions signals by means of the output of a means which detects the reference numbers of revolutions by a constant-frequency pulse. CONSTITUTION:Pulse generator 16 is provided for detecting a plural sets of reference numbers of revolutions by means of a constant-frequency pulse. This is connected to a pulse input take-in package enclosed in microcomputer in the same way as the pulse input from the process. On the other hand, since the software takes in the pulse input from the process and the constant-frequency pulse, if P1 is made the data of the constant-frequency pulse, and P2-Pn the data of the pulse sent from the process, and if the software is in a condition that data n of the constant-frequency pulse has no variation in the take-in with respect to the take-in period, all data is corrected by P2/P1xn, P3P1/xn, ... Consequently, only by adding a standardized pulse take-in package, it is possible to control the number of revolutions with high precision. |
