| 摘要 |
PURPOSE:To reduce valve operations and perform stable hydraulic pressure control by controlling plural valves simultaneously. CONSTITUTION:An adjusting valve controller receives a hydraulic pressure command 2-1 from a telemeter device 1-6 and the command is held in a storage device 2-2. The stored hydraulic pressure command 2-3 is compared 2-4 with an actual hydraulic pressure signal 2-9 from a hydraulic pressure detector 1-4 and the deviation is passed through a dead zone detector 2-5 and a valve controller 2-6 to generate a manipulated variable of opening and closing to a valve 1-3. In this case, a timer circuit 3-3 is added to the controller to coincide the generation time T of control pulses supplied to respective valves in a water distribution system. Consequently, the valves in the water distribution system operate at a time and then while the operation result appears at the water distribution system, the next operation covering all valves is performed at the next time simultaneously. |
