JPS5534766A - Fluid flow rate control device - Google Patents

Fluid flow rate control device

Info

Publication number
JPS5534766A
JPS5534766A JP10826378A JP10826378A JPS5534766A JP S5534766 A JPS5534766 A JP S5534766A JP 10826378 A JP10826378 A JP 10826378A JP 10826378 A JP10826378 A JP 10826378A JP S5534766 A JPS5534766 A JP S5534766A
Authority
JP
Japan
Prior art keywords
air flow
inv
loop
control
comparator
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
JP10826378A
Other languages
Japanese (ja)
Other versions
JPS589442B2 (en
Inventor
Akira Miyamoto
Shunji Mori
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 JP10826378A priority Critical patent/JPS589442B2/en
Publication of JPS5534766A publication Critical patent/JPS5534766A/en
Publication of JPS589442B2 publication Critical patent/JPS589442B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Feedback Control In General (AREA)
  • Safety Devices In Control Systems (AREA)
  • Flow Control (AREA)

Abstract

PURPOSE: To make it possible to control air flow stably in the measuring range of the air flow meter, by changing the control system from the closed loop to the open loop in case the observation with the air flow detector is much less than its rating.
CONSTITUTION: The chlorine gas setting value "inv-Q"f signals which are proportional to the flow rate of raw water are input to the comparator 12 which judges changeover of the loop, the function generator 13 in which characteristics of opening-air flow are stored, and the PI controller 2 which executes the air flow control. In case "inv-Q"f is higher than the projected value to the rating 100%, the changeover mechanism 15 conducts between A and c when the output signal S of the comparator 12 locates the contact of the loop changeover mechanism 15 at the side A, the observation "inv-Q"f from the detector 6 and the switch 8 becomes feedback value by the controller 2, and the air flow control by the closed loop is executed. In case "inv-Q"f becomes lower than the projected value, the comparator 12 is operated, conducts between B and C, and the generator 13 supplies the opening setting value Ka corresponding to "inv-Q"f to the opening setting unit 14. Thus the opening control by the open loop is executed without feedback of the air flow observation "inv-Q"f.
COPYRIGHT: (C)1980,JPO&Japio
JP10826378A 1978-09-04 1978-09-04 fluid flow control device Expired JPS589442B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10826378A JPS589442B2 (en) 1978-09-04 1978-09-04 fluid flow control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10826378A JPS589442B2 (en) 1978-09-04 1978-09-04 fluid flow control device

Publications (2)

Publication Number Publication Date
JPS5534766A true JPS5534766A (en) 1980-03-11
JPS589442B2 JPS589442B2 (en) 1983-02-21

Family

ID=14480212

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10826378A Expired JPS589442B2 (en) 1978-09-04 1978-09-04 fluid flow control device

Country Status (1)

Country Link
JP (1) JPS589442B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63210199A (en) * 1987-02-27 1988-08-31 株式会社荏原製作所 Steaming treatment method and apparatus
JPH0256380A (en) * 1988-08-20 1990-02-26 Tsudakoma Corp Quick response automatic control device of aligned string stretch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63210199A (en) * 1987-02-27 1988-08-31 株式会社荏原製作所 Steaming treatment method and apparatus
JPH0256380A (en) * 1988-08-20 1990-02-26 Tsudakoma Corp Quick response automatic control device of aligned string stretch
JP2694347B2 (en) * 1988-08-20 1997-12-24 津田駒工業株式会社 Automatic control device for quick response of aligned yarn stretch

Also Published As

Publication number Publication date
JPS589442B2 (en) 1983-02-21

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