Title:
WATER LEVEL CONTROLLER
Document Type and Number:
Japanese Patent JPS63268013
Kind Code:
A
Abstract:
PURPOSE:To change an adversely proportional constant without stopping a water level control action by using a constant setting means which can optionally set the adversely proportional constant that decides the adversely proportional relation between the deviation between a real water level and a reference water level and a pulse interval. CONSTITUTION:A comparator 7 calculates the deviation between a real water level obtained by a water level meter 2 and a water control width setting circuit 5 and a reference water level signal set by a reference water level setting circuit 4. Then said deviation is delivered to a control circuit 8. The circuit 8 outputs a pulse control signal having a pulse interval which is adversely proportional to said deviation to motor 4. Thus the motor 4 is actuated to perform the control so that the water level of a water tank 1 is kept constant. In this case, the pulse interval of the circuit 8 is decided by a fixed program and the constant of inverse proportionality is optionally decided by outputting a prescribed changing command to the circuit 8 from a varying device 12.
Inventors:
AMANO MICHIHARU
Application Number:
JP10252587A
Publication Date:
November 04, 1988
Filing Date:
April 24, 1987
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
G05D9/12; (IPC1-7): G05D9/12
Attorney, Agent or Firm:
Masuo Oiwa