| 摘要 |
<p>A pulsation controller for automatic milking apparatus providing the customary "On" and "Off" electrical pulses corresponding, respectively, to "milk flow" and "no milk flow" into the relevant teat up. The controller provides variation of pulse frequency, while maintaining constant duration of "Off" pulses, and also provides for pre-set adjustment of the "Off" pulse duration then maintained constant. The pulsation controller is itself controlled by a microcomputer (41), which executes a stored programme to provide the set pulse sequence in quadrature at four output terminal pairs (54). All required intervals are achieved using 1m sec. interrupts, loading a register with the required 1m sec. number and decrementing to zero the number stored by the corresponding number of interrupts.</p> |
