| 摘要 |
PURPOSE:To accurately measure the rotating quantity of the time when the rotating direction changes frequently by generating an output pulse by the AND of the fall pulse of the open signal of one switch, the close signal of the other switch and a rotating direction discriminating signal. CONSTITUTION:Two switches 3, 4 are opened and closed by the driving disc 2 of a revolving shaft 1, and the signals thereof are inputted via a forward-backward rotating quantity detector 5 to an addition-substraction counter 6, and are recorded in a recorder 7. The detecting circuit 5 applies the close signal of the switch 3 and the rise pulse of the close signal of the switch 4 through a differentiating circuit 19 to an AND circuit 23 and a change-over switch 26, thereby discriminating the rotating direction. The output thereof, the fall pulse of the switch 3 through a differentiating circuit 21 and the close signal of the switch 4 are applied to an AND circuit 30, so that an output pulse is generated. Hence, despite the frequent changes in the rotating direction, the accurate rotating quantity is obtained without making malfunction. |
