| 摘要 |
PURPOSE:To realize easily a pressure control corresponding to each demand flow rate transition curve, by obtaining each pressure detecting signal of a duct network end directly or by a telemeter, etc. CONSTITUTION:As for a pressure feedback signal operating part PF, direct pressure feedback signals A1-A4 are applied as one input by a telemeter, etc., by outputs of end pressure detectors 51-54 on which multipliers 81-84 are placed in end part areas W1-W4, respectively, an output of a coefficient generator 9 for signal-generating coefficients K1-K4 which are changed at a time unit in accordance with a used water quantity pattern, and whose mean value becomes ''1'' is provided as the other input, and also a mean value of outputs of the multipliers 81-84 is derived by a mean value operator 10. |
