Title:
WATER LEVEL CONTROLLER
Document Type and Number:
Japanese Patent JPH04171507
Kind Code:
A
Abstract:
PURPOSE:To attain the stable control of the water level without causing a hunting phenomenon by making the inflow subject to the characteristic which is inversely proportional to the water level when the water level of a distributing reservoir exceeds a target level and then setting the flow rate deviation obtained from the water level change and the area of the distributing reservoir at zero when the level of the reservoir approximates the target level respectively through the control of an inflow valve. CONSTITUTION:When the water level signal received from a water level indicator 2 is inputted to a water level/inflow setting means 10, the inflow is decided in response to a water level based on the prescribed control characteristic. That is, the maximum inflow is set and kept there until the water level approximates a target level. Then the set inflow inversely proportional to a water level change is decided when the water level approximates to the target level. This decided inflow is compared with the real inflow. When the water level approximates to a target level set optionally, the flow rate deviation caused by the water level change is obtained from the input value of the unit time, etc., and an inflow valve 4 is controlled so that the flow rate deviation is set at zero. Thus the water level is stably controlled regardless of the outflow.
Inventors:
NAGAO TETSUYA
NANAO TERUAKI
NANAO TERUAKI
Application Number:
JP30065090A
Publication Date:
June 18, 1992
Filing Date:
November 05, 1990
Export Citation:
Assignee:
KUBOTA KK
International Classes:
G05B5/04; G05B6/00; G05D7/06; G05D9/12; (IPC1-7): G05B5/04; G05B6/00; G05D7/06; G05D9/12
Attorney, Agent or Firm:
Koichi Suzue (1 person outside)