MX2012002540A - Aparatos, metodos y articulos de fabricacion para calibrar instrumentos montados sobre valvulas. - Google Patents

Aparatos, metodos y articulos de fabricacion para calibrar instrumentos montados sobre valvulas.

Info

Publication number
MX2012002540A
MX2012002540A MX2012002540A MX2012002540A MX2012002540A MX 2012002540 A MX2012002540 A MX 2012002540A MX 2012002540 A MX2012002540 A MX 2012002540A MX 2012002540 A MX2012002540 A MX 2012002540A MX 2012002540 A MX2012002540 A MX 2012002540A
Authority
MX
Mexico
Prior art keywords
valve
position sensor
values
value
estimated
Prior art date
Application number
MX2012002540A
Other languages
English (en)
Spanish (es)
Inventor
Stephen G Seberger
Perry K Carter
Original Assignee
Fisher Controls Int
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 Fisher Controls Int filed Critical Fisher Controls Int
Publication of MX2012002540A publication Critical patent/MX2012002540A/es

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/005—Valves
    • 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/40—Data acquisition and logging
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
    • G16Z99/00—Subject matter not provided for in other main groups of this subclass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7761—Electrically actuated valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8359—Inspection means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49405—Valve or choke making

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Fluid Mechanics (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)
  • Details Of Valves (AREA)
  • Valve Housings (AREA)
MX2012002540A 2009-08-28 2010-06-29 Aparatos, metodos y articulos de fabricacion para calibrar instrumentos montados sobre valvulas. MX2012002540A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/550,072 US8321059B2 (en) 2009-08-28 2009-08-28 Apparatus, methods and articles of manufacture to calibrate valve-mounted instruments
PCT/US2010/040441 WO2011031368A1 (en) 2009-08-28 2010-06-29 Valve calibration

Publications (1)

Publication Number Publication Date
MX2012002540A true MX2012002540A (es) 2012-04-10

Family

ID=43087070

Family Applications (2)

Application Number Title Priority Date Filing Date
MX2012002540A MX2012002540A (es) 2009-08-28 2010-06-29 Aparatos, metodos y articulos de fabricacion para calibrar instrumentos montados sobre valvulas.
MX2015005119A MX2015005119A (es) 2009-08-28 2013-10-21 Metodos para calibrar instrumentos montados en valvulas.

Family Applications After (1)

Application Number Title Priority Date Filing Date
MX2015005119A MX2015005119A (es) 2009-08-28 2013-10-21 Metodos para calibrar instrumentos montados en valvulas.

Country Status (10)

Country Link
US (3) US8321059B2 (https=)
EP (2) EP2470815B1 (https=)
JP (1) JP5719367B2 (https=)
CN (1) CN102472410B (https=)
AR (1) AR077981A1 (https=)
BR (2) BR112012001834A2 (https=)
CA (1) CA2768629C (https=)
MX (2) MX2012002540A (https=)
RU (1) RU2528222C2 (https=)
WO (1) WO2011031368A1 (https=)

Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009004572B4 (de) * 2009-01-14 2010-08-19 Abb Technology Ag Verfahren und elektronische Einrichtung zur Kompensation des Driftverhaltens bei einem pneumatischen Stellglied während des Betriebs
US8321059B2 (en) * 2009-08-28 2012-11-27 Fisher Controls International, Llc Apparatus, methods and articles of manufacture to calibrate valve-mounted instruments
JP4815538B2 (ja) * 2010-01-15 2011-11-16 シーケーディ株式会社 真空制御システムおよび真空制御方法
US8812914B2 (en) * 2011-10-24 2014-08-19 Fisher Controls International, Llc Field control devices having pre-defined error-states and related methods
DE102012109206B4 (de) * 2011-11-30 2019-05-02 Hanon Systems Ventil-Sensor-Anordnung
CN102537486B (zh) * 2012-01-13 2013-10-02 杭州博流科技有限公司 一种智能阀门定位器
US9127624B2 (en) * 2012-06-20 2015-09-08 General Electric Company Systems and methods for a hydraulically actuated engine valve
US9285057B2 (en) * 2012-10-05 2016-03-15 Fisher Controls International Llc Methods and apparatus for process device calibration
CN203979570U (zh) * 2012-10-22 2014-12-03 费希尔控制国际公司 控制阀组件
US9383287B2 (en) * 2012-12-14 2016-07-05 Eaton Corporation Online sensor calibration for electrohydraulic valves
CN106170614A (zh) * 2013-08-27 2016-11-30 梅林工具有限公司 用于汽车冷却系统的温度控制装置及方法
US9316147B2 (en) * 2013-08-29 2016-04-19 Ford Global Technologies, Llc Determination of wastegate valve position
US9180260B2 (en) * 2013-08-30 2015-11-10 Covidien Lp Systems and methods for monitoring an injection procedure
US9169771B2 (en) * 2013-09-20 2015-10-27 Ford Global Technologies, Llc Wastegate valve position correction
US9638344B2 (en) * 2013-11-19 2017-05-02 Dresser, Inc. System and method to monitor characteristics of an operating fluid in a process line
CN106461096A (zh) * 2014-01-07 2017-02-22 桑杜科技有限公司 流量控制阀
US10165955B2 (en) * 2014-02-06 2019-01-01 Reuven Gladshtein Obtaining cardiovascular parameters using arterioles related transient time
EP2905520B1 (en) * 2014-02-07 2017-04-12 Sandvik Intellectual Property AB Fluid control valve
US9732669B2 (en) * 2014-02-25 2017-08-15 Ford Global Technologies, Llc Wastegate valve seat position determination
US9620034B2 (en) 2014-02-25 2017-04-11 Fisher Controls International Llc Methods and apparatus to expose enclosure labels
JP6088457B2 (ja) 2014-03-11 2017-03-01 アズビル株式会社 ポジショナ
US9982786B2 (en) * 2014-05-30 2018-05-29 Applied Materials, Inc. Valve with adjustable hard stop
US9593997B2 (en) 2014-08-08 2017-03-14 Fluke Corporation Self-locking modular pressure controller/calibrator
CA2980141C (en) * 2015-03-19 2024-01-02 Fisher Controls International Llc Pressure control for calibrating process control devices
FR3035469B1 (fr) * 2015-04-23 2017-05-12 Snecma Vanne et procede de commande
US9739682B2 (en) 2015-05-04 2017-08-22 Dresser, Inc. Valve assembly calibration
DE102015109694B4 (de) 2015-06-17 2017-06-29 Johnson Electric Germany GmbH & Co. KG Absperrventil für den Einbau in Gaszähler und Verfahren zum Betreiben desselben
US10353405B2 (en) * 2015-10-09 2019-07-16 Fisher Controls International Llc Automatic calibration of position transmitter
US11125453B2 (en) * 2016-03-10 2021-09-21 Carrier Corporation Calibration of an actuator
JP6671202B2 (ja) * 2016-03-23 2020-03-25 アズビル株式会社 ポジショナ
US10139804B2 (en) * 2016-03-29 2018-11-27 Emerson Process Management Valve Automation, Inc. System and method for self-calibration of an actuator
JP2017194122A (ja) * 2016-04-21 2017-10-26 アズビル株式会社 ポジショナおよびバルブ制御システム
WO2017221877A1 (ja) * 2016-06-21 2017-12-28 Ckd株式会社 流体制御弁、及び流体制御弁製造方法
JP6751609B2 (ja) * 2016-07-05 2020-09-09 サーパス工業株式会社 流量調整装置
CN109964194B (zh) * 2016-09-19 2022-12-27 流体设备系统有限公司 用于基于压力的自校正质量流量控制器的装置和方法
CN106678416A (zh) * 2016-09-26 2017-05-17 温伟光 新型带有霍尔元件的气流控制电磁阀
US10465803B2 (en) * 2016-10-05 2019-11-05 Johnson Controls Technology Company Multipurpose valve assembly tool
CN110382934B (zh) * 2017-03-17 2021-09-10 株式会社富士金 流体控制设备
US10719089B2 (en) * 2017-05-18 2020-07-21 Fisher Controls International Llc Apparatus and methods to characterize fluid control valves
FR3070486A1 (fr) * 2017-08-31 2019-03-01 Valeo Systemes De Controle Moteur Procede de calibration d'un dispositif magnetique de determination de la position d'une piece en translation
CN107588211B (zh) * 2017-09-19 2024-07-30 南京天河水环境科技有限公司 水路切换阀及校准方法、反洗控制方法、过滤控制方法
JP7008499B2 (ja) * 2017-12-27 2022-01-25 株式会社堀場エステック 校正データ作成装置及び校正データ作成方法、並びに、流量制御装置
US10865817B2 (en) * 2018-10-10 2020-12-15 Dresser, Llc Compensating for orientation of a valve positioner on a valve assembly
US11675374B2 (en) * 2018-10-26 2023-06-13 Illinois Tool Works Inc. Mass flow controller with advanced zero trending diagnostics
US12379238B2 (en) 2018-10-26 2025-08-05 Illinois Tool Works Inc. Mass flow controller with advanced back streaming diagnostics
CN109883370B (zh) * 2019-01-22 2021-04-06 浙江工业大学 一种阀位变送器的标定装置及其使用方法
US10754362B1 (en) * 2019-02-20 2020-08-25 Fisher Controls International, Llc Adjustment of loop-powered pneumatic process control device interfaces
KR102155221B1 (ko) * 2019-02-26 2020-09-11 주식회사 유니크 삼방향 밸브
KR102174116B1 (ko) * 2019-02-26 2020-11-06 주식회사 유니크 3방향 밸브
DE102019105515B4 (de) * 2019-03-05 2021-06-24 Bürkert Werke GmbH & Co. KG Membranregelventil
DE102019112725A1 (de) * 2019-05-15 2020-11-19 Bürkert Werke GmbH & Co. KG Justage von Hubendstellungen eines Prozessregelventils
BR102019009861A2 (pt) * 2019-05-15 2020-11-24 Sense Eletrônica Ltda. dispositivo para monitoramento e posicionamento de válvulas
WO2021161246A1 (en) * 2020-02-12 2021-08-19 Padmini Vna Mechatronics Pvt. Ltd. System for monitoring plunger movement in non-energized condition in real time
JP6905616B1 (ja) 2020-04-02 2021-07-21 油研工業株式会社 位置検出器付き油圧機器
US11454334B1 (en) * 2021-04-09 2022-09-27 Dresser, Llc Accuracy of control valves using a short-stroke position converter
CN114063495A (zh) * 2021-10-29 2022-02-18 广东远通工业科技有限公司 一种智能阀门控制器
DE102021129496A1 (de) * 2021-11-12 2023-05-17 Samson Aktiengesellschaft Sensorvorrichtung, Messanordnung und Verfahren zur Montage einer Sensorvorrichtung
DE102021005995A1 (de) 2021-12-02 2023-06-07 Vat Holding Ag Pendelventil mit Kalibriervorrichtung
JP7662944B2 (ja) * 2022-03-30 2025-04-16 浜名湖電装株式会社 位置検出機能付きソレノイド装置
CN115218027B (zh) * 2022-07-29 2026-01-02 华能上海燃机发电有限责任公司 用于气动套筒式调节阀标准行程调节的装置及调节方法
JP2024079471A (ja) * 2022-11-30 2024-06-11 株式会社フジキン バルブ制御装置、バルブ制御システム、バルブ制御方法、およびバルブ制御プログラム

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2827767A (en) * 1955-12-07 1958-03-25 Tecalemit Ltd Fluid actuated control and operating mechanisms
US3136333A (en) * 1960-04-25 1964-06-09 Donald G Griswold Modulating valve control systems
SU513205A1 (ru) * 1974-05-13 1976-05-05 Научно-Производственное Объединение "Киеварматура" Датчик положени затвора клапана
US4298017A (en) * 1980-02-04 1981-11-03 Poly-Glas Systems Automatic fluid component shut off system
US4694390A (en) * 1985-06-28 1987-09-15 Electric Power Research Institute, Inc. Microprocessor-based control and diagnostic system for motor operated valves
US4816987A (en) * 1985-06-28 1989-03-28 Electric Power Research Institute, Inc. Microprocessor-based control and diagnostic system for motor operated valves
JP2602844B2 (ja) * 1987-09-07 1997-04-23 株式会社日立製作所 弁位置検出方法及び弁位置検出装置
US5197328A (en) 1988-08-25 1993-03-30 Fisher Controls International, Inc. Diagnostic apparatus and method for fluid control valves
JP2647567B2 (ja) * 1991-03-08 1997-08-27 東京瓦斯株式会社 調節弁の制御機構
US5332965A (en) * 1992-06-22 1994-07-26 Durakool Incorporated Contactless linear angular position sensor having an adjustable flux concentrator for sensitivity adjustment and temperature compensation
US5518015A (en) 1994-09-30 1996-05-21 Gas Research Institute Automatic calibrating electrically controlled diaphragm valve actuators and methods for their calibration
US6272401B1 (en) * 1997-07-23 2001-08-07 Dresser Industries, Inc. Valve positioner system
JP3511458B2 (ja) * 1997-12-08 2004-03-29 株式会社山武 電空ポジショナ
US6293249B1 (en) * 1998-08-10 2001-09-25 Toyota Jidosha Kabushiki Kaisha Unit for controlling electronically controlled throttle valve
US6358327B1 (en) 1999-06-29 2002-03-19 Applied Materials, Inc. Method for endpoint detection using throttle valve position
US6895351B2 (en) * 1999-06-29 2005-05-17 Fisher Controls International Llc Regulator flow measurement apparatus
JP3614092B2 (ja) * 2000-08-15 2005-01-26 日産自動車株式会社 電磁駆動弁のバルブクリアランス推定装置及び制御装置
US6837226B2 (en) * 2001-01-31 2005-01-04 Cummins, Inc. System for diagnosing EGR valve, actuator and sensor related failure conditions
DE10218830C1 (de) * 2002-04-26 2003-12-18 Siemens Ag Diagnosesystem und -verfahren für ein Ventil
US7275445B2 (en) * 2003-08-11 2007-10-02 Honeywell International, Inc Modular pressure sensor drive connectable to a computer
US7152469B2 (en) * 2004-01-13 2006-12-26 Baxter International Inc. Fluid flow sensor, method and system
RU2314450C1 (ru) * 2006-05-18 2008-01-10 Открытое акционерное общество "Акционерная компания по транспорту нефти "ТРАНСНЕФТЬ" Устройство управления электроприводом запорной арматуры
US8321059B2 (en) 2009-08-28 2012-11-27 Fisher Controls International, Llc Apparatus, methods and articles of manufacture to calibrate valve-mounted instruments
CN203979570U (zh) * 2012-10-22 2014-12-03 费希尔控制国际公司 控制阀组件

Also Published As

Publication number Publication date
RU2528222C2 (ru) 2014-09-10
CA2768629C (en) 2017-06-27
US20160124436A1 (en) 2016-05-05
JP2013503309A (ja) 2013-01-31
US20130042476A1 (en) 2013-02-21
JP5719367B2 (ja) 2015-05-20
RU2012109906A (ru) 2013-10-10
US20110048556A1 (en) 2011-03-03
EP2470815B1 (en) 2013-09-11
BR112015009049A2 (pt) 2017-07-04
EP2700857A1 (en) 2014-02-26
CA2768629A1 (en) 2011-03-17
MX2015005119A (es) 2015-10-29
CN102472410B (zh) 2014-05-28
AR077981A1 (es) 2011-10-05
CN102472410A (zh) 2012-05-23
BR112012001834A2 (pt) 2016-03-15
WO2011031368A1 (en) 2011-03-17
US9188239B2 (en) 2015-11-17
EP2470815A1 (en) 2012-07-04
US10120392B2 (en) 2018-11-06
US8321059B2 (en) 2012-11-27
EP2700857B1 (en) 2015-04-15

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