JPS57187715A - Control system for constant flow rate of gate valve - Google Patents

Control system for constant flow rate of gate valve

Info

Publication number
JPS57187715A
JPS57187715A JP7202881A JP7202881A JPS57187715A JP S57187715 A JPS57187715 A JP S57187715A JP 7202881 A JP7202881 A JP 7202881A JP 7202881 A JP7202881 A JP 7202881A JP S57187715 A JPS57187715 A JP S57187715A
Authority
JP
Japan
Prior art keywords
flow rate
opening
extent
gate valve
present
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.)
Granted
Application number
JP7202881A
Other languages
Japanese (ja)
Other versions
JPH0337203B2 (en
Inventor
Rintaro Kotaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7202881A priority Critical patent/JPS57187715A/en
Publication of JPS57187715A publication Critical patent/JPS57187715A/en
Publication of JPH0337203B2 publication Critical patent/JPH0337203B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Flow Control (AREA)

Abstract

PURPOSE:To simplify the constitution of a control system by calculating the manipulated value of a gate valve on the basis of a desired flow rate and last and present actual measured flow rates and extents of opening, and then obtaining the initial desired flow rate by operating the gate valve appproximately. CONSTITUTION:When the extent of opening of a gate valve is P and the flow rate at this is Q, P=KQ. For this purpose, the coefficient K is calculted from the last extent of opening Pi-1 and flow rate Qi-1 and the present extent of opening Pi and flow rate Qi. Further, a difference DELTAQi between a desired flow rate Qa and present flow rate Qi is found, and then multiplied by an approximate speed coefficient (r) to calcuate a present desired value DELTAQi+1 of variation in flow rate. Then, variation DELTAPi+1 in extent of opening equivalent to the DELTAQi+1 is calculated. The variation Pi+1 is added to the present extent of opening Pi to calculate a following desired extent of opening Pi+1, and thus the manipulated value of the gate valve is found to control the extent of opening of the gate valve. This operation is repeated at intervals of adequate halt time to control the extent of opening of the gate valve approximately to the initial desired flow rate position.
JP7202881A 1981-05-13 1981-05-13 Control system for constant flow rate of gate valve Granted JPS57187715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7202881A JPS57187715A (en) 1981-05-13 1981-05-13 Control system for constant flow rate of gate valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7202881A JPS57187715A (en) 1981-05-13 1981-05-13 Control system for constant flow rate of gate valve

Publications (2)

Publication Number Publication Date
JPS57187715A true JPS57187715A (en) 1982-11-18
JPH0337203B2 JPH0337203B2 (en) 1991-06-04

Family

ID=13477541

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7202881A Granted JPS57187715A (en) 1981-05-13 1981-05-13 Control system for constant flow rate of gate valve

Country Status (1)

Country Link
JP (1) JPS57187715A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6087013U (en) * 1983-11-14 1985-06-15 株式会社明電舎 Water intake control device
JPH0340114A (en) * 1989-07-07 1991-02-20 Hitachi Ltd Method and device for controlling fluid flow rate
JPH03113608A (en) * 1989-09-28 1991-05-15 Yokogawa Electric Corp Flow velocity control system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5329489A (en) * 1976-08-31 1978-03-18 Sharp Corp Fluid flow qwantity controlling system
JPS5329490A (en) * 1976-08-31 1978-03-18 Sharp Corp Fluid flow qwantity controlling system
JPS5413883A (en) * 1977-07-04 1979-02-01 Hitachi Ltd Abnormalness detector of automatic controller
JPS5569816A (en) * 1978-11-21 1980-05-26 Chiyou Lsi Gijutsu Kenkyu Kumiai Flow controller
JPS55131812A (en) * 1979-03-31 1980-10-14 Toshiba Corp Gate control method of dam
JPS569809A (en) * 1979-07-06 1981-01-31 Mitsubishi Electric Corp Dam gate controller

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5329489A (en) * 1976-08-31 1978-03-18 Sharp Corp Fluid flow qwantity controlling system
JPS5329490A (en) * 1976-08-31 1978-03-18 Sharp Corp Fluid flow qwantity controlling system
JPS5413883A (en) * 1977-07-04 1979-02-01 Hitachi Ltd Abnormalness detector of automatic controller
JPS5569816A (en) * 1978-11-21 1980-05-26 Chiyou Lsi Gijutsu Kenkyu Kumiai Flow controller
JPS55131812A (en) * 1979-03-31 1980-10-14 Toshiba Corp Gate control method of dam
JPS569809A (en) * 1979-07-06 1981-01-31 Mitsubishi Electric Corp Dam gate controller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6087013U (en) * 1983-11-14 1985-06-15 株式会社明電舎 Water intake control device
JPH0340114A (en) * 1989-07-07 1991-02-20 Hitachi Ltd Method and device for controlling fluid flow rate
JPH03113608A (en) * 1989-09-28 1991-05-15 Yokogawa Electric Corp Flow velocity control system

Also Published As

Publication number Publication date
JPH0337203B2 (en) 1991-06-04

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