| 摘要 |
PURPOSE:To reduce the pulsation of pressure by calculating a driving pattern in which the sum of the speed of two plunger becomes constant and adding a value proportionate to a value obtained by code inverting the time differential value of the pressure of a composite delivery, to said driving pattern. CONSTITUTION:A signal from a flow rate setter 26 is inputted into a microcom puter 24 via a code converting circuit 27 while a signal from a start/stop button 28 is inputted into the microcomputer 24 via a pulse generating circuit 29. And, pulse motors 1 and driven by means of the microcomputer 24 via a driver 25, to reciprocate plungers 8, 9 via transmission systems 14-16. In this case, a signal from a pressure sensor 20 is inputted into the microcomputer 24 via a differential circuit 21 and an A/D converter 22. Signals from rotary encoders 19 installed on the motors 1 and a rotation angle detector 23 are also inputted into the microcomputer 24. And, the speeds of the plungers 8, 9 are controlled so as to reduce the pulsation of pressure.
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