| 摘要 |
PURPOSE:To reduce the variation of an emitting amount as low as possible, by detecting the specific phase or arbitrary phase in one cycle at the time of pumping operation and controlling the speed of the drive source of a pumping mechanism corresponding to the variation of the emitting amount based on the phase data. CONSTITUTION:The count value of a motor pulse counter 19 corresponds to the phase at the present point of time in one cycle of the pumping operation process of a pumping mechanism 12 wherein the point of time when a detection signal is outputted from a photointerruptor 16 is set to the orgin. The number of the output pulses from a motor pulse generating part 20 required in the driving of the mechanism 12 from a phase phi0 to a phase phi1 are set to n1 and the number of output pulses for driving the mechanism 12 from the phase phi1 to a phase phi2 in the same way are set to n2 and the number of the count pulses of the counter 19 are set to nc. When the inputted count signal nc in a count value ratio comparing part 22 is judged to be 0<=nc<n1, a pulse motor 10 is rotated at a high speed to feed a transfusion solution at a high speed and, when the count signal nc is judged to be n1<=nc<(n1+n2), the pulse motor 10 is rotated at a low speed to feed the solution at a low speed.
|
