JPS6466403A - Valve position detecting method and valve position detecting device - Google Patents

Valve position detecting method and valve position detecting device

Info

Publication number
JPS6466403A
JPS6466403A JP22186487A JP22186487A JPS6466403A JP S6466403 A JPS6466403 A JP S6466403A JP 22186487 A JP22186487 A JP 22186487A JP 22186487 A JP22186487 A JP 22186487A JP S6466403 A JPS6466403 A JP S6466403A
Authority
JP
Japan
Prior art keywords
detectors
detecting
position detecting
valve position
hydraulic cylinder
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
JP22186487A
Other languages
Japanese (ja)
Other versions
JP2602844B2 (en
Inventor
Hiroshi Ota
Takayoshi Maeda
Koji Yamaguchi
Toshinori Ito
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 Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Engineering Co Ltd
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 Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Engineering Co Ltd
Priority to JP22186487A priority Critical patent/JP2602844B2/en
Publication of JPS6466403A publication Critical patent/JPS6466403A/en
Application granted granted Critical
Publication of JP2602844B2 publication Critical patent/JP2602844B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

PURPOSE:To prevent detectors from breaking due to oscillation so as to enhance detecting accuracy by detecting the moving quantities of a hydraulic cylinder and a piston rod with respect to a reference plane in non-contact state and calculating valve opening from both detected values. CONSTITUTION:Detecting collars 13, 14 are provided on a switch rod 2 connected to a piston rod in a hydraulic cylinder 3, and electrical non-contact type valve opening detectors 5a, 5b are provided in positions opposed to the collars 13, 14. In addition, a moving quantity detecting collar 15 is provided on the hydraulic cylinder 3, and a moving quantity detector 16 is fixed to a support 17 in opposition to this. Opening of a valve disc 6 is calculated by means of such a process that detected signals from the valve opening detectors are corrected by a single from the moving quantity detector. With this arrangement, the detectors can be prevented from breaking due to the oscillation of a valve.
JP22186487A 1987-09-07 1987-09-07 Valve position detection method and valve position detection device Expired - Lifetime JP2602844B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22186487A JP2602844B2 (en) 1987-09-07 1987-09-07 Valve position detection method and valve position detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22186487A JP2602844B2 (en) 1987-09-07 1987-09-07 Valve position detection method and valve position detection device

Publications (2)

Publication Number Publication Date
JPS6466403A true JPS6466403A (en) 1989-03-13
JP2602844B2 JP2602844B2 (en) 1997-04-23

Family

ID=16773382

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22186487A Expired - Lifetime JP2602844B2 (en) 1987-09-07 1987-09-07 Valve position detection method and valve position detection device

Country Status (1)

Country Link
JP (1) JP2602844B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013503309A (en) * 2009-08-28 2013-01-31 フィッシャー コントロールズ インターナショナル リミテッド ライアビリティー カンパニー Valve calibration

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013503309A (en) * 2009-08-28 2013-01-31 フィッシャー コントロールズ インターナショナル リミテッド ライアビリティー カンパニー Valve calibration
US9188239B2 (en) 2009-08-28 2015-11-17 Fisher Controls International, Llc Apparatus, methods and articles of manufacture to calibrate valve-mounted instruments
US10120392B2 (en) 2009-08-28 2018-11-06 Fisher Controls International, Llc Apparatus, methods and articles of manufacture to calibrate valve-mounted instruments

Also Published As

Publication number Publication date
JP2602844B2 (en) 1997-04-23

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