DE69026454D1 - Kompensationsschaltung für Nullpunktabweichung - Google Patents

Kompensationsschaltung für Nullpunktabweichung

Info

Publication number
DE69026454D1
DE69026454D1 DE69026454T DE69026454T DE69026454D1 DE 69026454 D1 DE69026454 D1 DE 69026454D1 DE 69026454 T DE69026454 T DE 69026454T DE 69026454 T DE69026454 T DE 69026454T DE 69026454 D1 DE69026454 D1 DE 69026454D1
Authority
DE
Germany
Prior art keywords
upstream
downstream
current
heater
switch
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.)
Expired - Fee Related
Application number
DE69026454T
Other languages
English (en)
Other versions
DE69026454T2 (de
Inventor
Tetsuo Hisanaga
Shigeru Aoshima
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.)
Azbil Corp
Original Assignee
Azbil Corp
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 Azbil Corp filed Critical Azbil Corp
Publication of DE69026454D1 publication Critical patent/DE69026454D1/de
Application granted granted Critical
Publication of DE69026454T2 publication Critical patent/DE69026454T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G01F1/6965—Circuits therefor, e.g. constant-current flow meters comprising means to store calibration data for flow signal calculation or correction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/696—Circuits therefor, e.g. constant-current flow meters
    • G01F1/698—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
    • G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
    • G01P21/025—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers for measuring speed of fluids; for measuring speed of bodies relative to fluids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/10—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring thermal variables

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Measuring Volume Flow (AREA)
  • Error Detection And Correction (AREA)
  • Amplifiers (AREA)
  • Eye Examination Apparatus (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
DE69026454T 1989-08-07 1990-08-07 Kompensationsschaltung für Nullpunktabweichung Expired - Fee Related DE69026454T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1202924A JPH0663803B2 (ja) 1989-08-07 1989-08-07 零点補償方法

Publications (2)

Publication Number Publication Date
DE69026454D1 true DE69026454D1 (de) 1996-05-15
DE69026454T2 DE69026454T2 (de) 1996-11-28

Family

ID=16465415

Family Applications (2)

Application Number Title Priority Date Filing Date
DE4024827A Withdrawn DE4024827A1 (de) 1989-08-07 1990-08-04 Nullpunkt-kompensationsschaltkreis fuer einen durchflussmesser
DE69026454T Expired - Fee Related DE69026454T2 (de) 1989-08-07 1990-08-07 Kompensationsschaltung für Nullpunktabweichung

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE4024827A Withdrawn DE4024827A1 (de) 1989-08-07 1990-08-04 Nullpunkt-kompensationsschaltkreis fuer einen durchflussmesser

Country Status (6)

Country Link
US (1) US5076099A (de)
EP (1) EP0421585B1 (de)
JP (1) JPH0663803B2 (de)
AT (1) ATE136643T1 (de)
DE (2) DE4024827A1 (de)
GB (1) GB2235298A (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2641333B2 (ja) * 1991-03-13 1997-08-13 日本碍子株式会社 熱式流量センサ
US5311762A (en) * 1991-12-16 1994-05-17 Dxl Usa Flow sensor calibration
US5363689A (en) * 1992-09-11 1994-11-15 Intertech Development Company Calibration device for leak detecting instruments
US5493906A (en) * 1994-06-01 1996-02-27 Peking University Automatic offset control for constant temperature anemometer
DE19623174C1 (de) * 1996-06-10 1997-11-27 Trilog Thermotechnik Gmbh Vorrichtung zum Erfassen eines flüssigen oder gasförmigen Mediums
GB2347747B (en) * 1999-03-08 2001-01-31 Advanced Energy Monitor Syst Method and means for measuring fluid flow
JP2002054964A (ja) * 2000-08-10 2002-02-20 Mitsui Mining & Smelting Co Ltd 流量測定方法及び流量計
US7712347B2 (en) * 2007-08-29 2010-05-11 Honeywell International Inc. Self diagnostic measurement method to detect microbridge null drift and performance
US7685875B2 (en) * 2007-10-23 2010-03-30 Therm-O-Disc, Incorporated Fluid flow rate sensor and method of operation
EP2341214A1 (de) * 2009-12-29 2011-07-06 Welltec A/S Thermografisches Erfassungswerkzeug
WO2013036583A1 (en) * 2011-09-06 2013-03-14 Techox Industries, Inc. Method of deducing time based metrics using flow rate
DE102012001060A1 (de) * 2011-10-24 2013-04-25 Hydrometer Gmbh Verfahren zur Korrektur von Offset-Drift-Effekten einer thermischen Messeinrichtung, thermische Messeinrichtung und Gasdurchflussmessgerät
US9631965B2 (en) 2012-02-15 2017-04-25 Sensortechnics GmbH Offset compensation for flow sensing devices
US10337900B2 (en) * 2013-09-09 2019-07-02 Horiba Stec, Co., Ltd. Thermal flow meter, temperature measurement device, and thermal flow meter program
US10890472B2 (en) * 2016-08-25 2021-01-12 Honeywell International Inc. Low power operational methodology for a flow sensor
EP3512586B1 (de) * 2016-09-16 2022-12-21 Fisher & Paykel Healthcare Limited Thermistordurchflusssensor mit mehreren temperaturpunkten

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB153904A (en) * 1919-11-15 1922-01-26 Schweizerische Lokomotiv Improvements in or relating to reversing gears for internal combustion engines
US3891391A (en) * 1973-05-14 1975-06-24 George R Boone Fluid flow measuring system using improved temperature compensation apparatus and method
DE2447617C3 (de) * 1974-10-05 1980-09-04 Ellenberger & Poensgen Gmbh, 8503 Altdorf Kalorimetrischer Strömungswächter
JPS60151517A (ja) * 1984-01-18 1985-08-09 Nippon Soken Inc 半導体式流量検出装置
US4779458A (en) * 1986-12-29 1988-10-25 Mawardi Osman K Flow sensor
US4739657A (en) * 1987-06-22 1988-04-26 Honeywell Inc. Resistance with linear temperature coefficient
DE3803611A1 (de) * 1988-02-06 1989-08-17 Bosch Gmbh Robert Schaltgeregelte stroemungssonde

Also Published As

Publication number Publication date
ATE136643T1 (de) 1996-04-15
EP0421585B1 (de) 1996-04-10
US5076099A (en) 1991-12-31
GB2235298A (en) 1991-02-27
GB9017322D0 (en) 1990-09-19
JPH0663803B2 (ja) 1994-08-22
EP0421585A3 (en) 1993-02-10
DE69026454T2 (de) 1996-11-28
DE4024827A1 (de) 1991-02-14
JPH0367129A (ja) 1991-03-22
EP0421585A2 (de) 1991-04-10

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee