JPS5714904A - Water level control device - Google Patents

Water level control device

Info

Publication number
JPS5714904A
JPS5714904A JP8787780A JP8787780A JPS5714904A JP S5714904 A JPS5714904 A JP S5714904A JP 8787780 A JP8787780 A JP 8787780A JP 8787780 A JP8787780 A JP 8787780A JP S5714904 A JPS5714904 A JP S5714904A
Authority
JP
Japan
Prior art keywords
flow
rate
operator
change
interval
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8787780A
Other languages
Japanese (ja)
Inventor
Akira Miyamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8787780A priority Critical patent/JPS5714904A/en
Publication of JPS5714904A publication Critical patent/JPS5714904A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Feedback Control In General (AREA)
  • Control Of Non-Electrical Variables (AREA)

Abstract

PURPOSE:To realize a stable control of water level following any change of the flow-in rate of water, by giving a correction to the ratio between the arithmetic interval of flow-in rate change and the feed-forward compensating interval in accordance with the change of flow-in rate of water. CONSTITUTION:The following component units are provided: a water level control operator 6; a discharged flow rate operator 7; a rotational frequency operator 8; a flow-in rate change operator 10''; and an execution clock producer 21' that divides the operation of the operator 10'' into the flow-in rate change arithmetic interval and the feed-forward compensating interval. For the flow-in rate change arithmetic interval, the rotational frequency of a pump 10 is fixed, and the change of flow-in rate to a pump 1 is presumed and stored by the operator 10'' from the changing factor of water level to the pump 1 and the real pumping change factor of the pump. While for the feed-forward compensating interval, a correction is given to the input to be supplied to the operator 7 by means of the presumed value of flow-in rate change that is presumed and stored as mentioned above.
JP8787780A 1980-06-30 1980-06-30 Water level control device Pending JPS5714904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8787780A JPS5714904A (en) 1980-06-30 1980-06-30 Water level control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8787780A JPS5714904A (en) 1980-06-30 1980-06-30 Water level control device

Publications (1)

Publication Number Publication Date
JPS5714904A true JPS5714904A (en) 1982-01-26

Family

ID=13927086

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8787780A Pending JPS5714904A (en) 1980-06-30 1980-06-30 Water level control device

Country Status (1)

Country Link
JP (1) JPS5714904A (en)

Similar Documents

Publication Publication Date Title
JPS5211405A (en) Pump with inducer
JPS56165783A (en) Water level controller
JPS5622112A (en) Control device for water level of distributing reservoir
JPS557918A (en) Different-capacity pump quantity controlling apparatus
JPS54129747A (en) Controlling of quantity of supplied chemicals to sludge disposal equipment
JPS5490404A (en) Feed water flow rate controller
JPS5635201A (en) Rush flow preventing device
JPS54123703A (en) Method of controlling number of pump cabs
JPS56138479A (en) Pump control unit
JPS5574608A (en) Control method for pump
JPS5523345A (en) Guide vane of fluid machine and its use
JPS5783818A (en) Water level adjusting device
JPS5232103A (en) Absorbing fluid path for centrifugal pump
JPS54175A (en) Flow-amount controlling apparatus
JPS6468633A (en) Control method for pressure for pressure instrument inspection
JPS56146086A (en) Controller for number of pump
JPS5697108A (en) Control method of number of set of pump
JPS56113085A (en) Operation method for pump
JPS51145004A (en) Input/output control system for rotary pumps
JPS5781684A (en) Inflow calculating device
JPS5596383A (en) Changer for number of operating pump
JPS53147102A (en) Controller of feed water pump for driving turbine
JPS55109789A (en) Pump controlling device
JPS5457201A (en) Device ofr controlling number of pumps
JPS52153210A (en) Automatic pumping device