JP4226616B2 - 熱式流量計測装置 - Google Patents

熱式流量計測装置 Download PDF

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Publication number
JP4226616B2
JP4226616B2 JP2006171594A JP2006171594A JP4226616B2 JP 4226616 B2 JP4226616 B2 JP 4226616B2 JP 2006171594 A JP2006171594 A JP 2006171594A JP 2006171594 A JP2006171594 A JP 2006171594A JP 4226616 B2 JP4226616 B2 JP 4226616B2
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JP
Japan
Prior art keywords
heating element
wiring
temperature detection
temperature
detection means
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
JP2006171594A
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English (en)
Japanese (ja)
Other versions
JP2008002896A5 (enExample
JP2008002896A (ja
Inventor
昌大 松本
雅通 山田
洋 中野
恵二 半沢
恭弘 金丸
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 JP2006171594A priority Critical patent/JP4226616B2/ja
Priority to US11/765,736 priority patent/US7617723B2/en
Priority to EP07012215.5A priority patent/EP1870681B1/en
Publication of JP2008002896A publication Critical patent/JP2008002896A/ja
Publication of JP2008002896A5 publication Critical patent/JP2008002896A5/ja
Application granted granted Critical
Publication of JP4226616B2 publication Critical patent/JP4226616B2/ja
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/6845—Micromachined devices
    • 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
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G01F1/688—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element
    • G01F1/69—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow using a particular type of heating, cooling or sensing element of resistive type
    • G01F1/692—Thin-film arrangements
    • 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
    • G01F1/6986—Feedback or rebalancing circuits, e.g. self heated constant temperature flowmeters with pulsed heating, e.g. dynamic methods

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
JP2006171594A 2006-06-21 2006-06-21 熱式流量計測装置 Expired - Fee Related JP4226616B2 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2006171594A JP4226616B2 (ja) 2006-06-21 2006-06-21 熱式流量計測装置
US11/765,736 US7617723B2 (en) 2006-06-21 2007-06-20 Thermal type flow rate measuring apparatus having decrease in coupling capacitance between wiring portions of detection element
EP07012215.5A EP1870681B1 (en) 2006-06-21 2007-06-21 Thermal type flow rate measuring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006171594A JP4226616B2 (ja) 2006-06-21 2006-06-21 熱式流量計測装置

Publications (3)

Publication Number Publication Date
JP2008002896A JP2008002896A (ja) 2008-01-10
JP2008002896A5 JP2008002896A5 (enExample) 2008-06-19
JP4226616B2 true JP4226616B2 (ja) 2009-02-18

Family

ID=38654807

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006171594A Expired - Fee Related JP4226616B2 (ja) 2006-06-21 2006-06-21 熱式流量計測装置

Country Status (3)

Country Link
US (1) US7617723B2 (enExample)
EP (1) EP1870681B1 (enExample)
JP (1) JP4226616B2 (enExample)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4976469B2 (ja) 2009-08-28 2012-07-18 日立オートモティブシステムズ株式会社 熱式湿度センサ
JP5152292B2 (ja) * 2010-10-06 2013-02-27 株式会社デンソー 流量計測装置
JP6283427B2 (ja) * 2014-11-28 2018-02-21 日立オートモティブシステムズ株式会社 熱式流量センサ
GB2533936B (en) 2015-01-07 2017-10-25 Homeserve Plc Flow detection device
GB201501935D0 (en) 2015-02-05 2015-03-25 Tooms Moore Consulting Ltd And Trow Consulting Ltd Water flow analysis
FR3069126B1 (fr) * 2017-07-12 2020-11-13 Commissariat Energie Atomique Dispositif de regeneration de composants electroniques en environnement nucleaire
US11092101B2 (en) * 2018-08-22 2021-08-17 Rosemount Aerospace Inc. Heater in-circuit capacitive measurement

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6239722A (ja) 1985-08-16 1987-02-20 Nippon Soken Inc 流量センサ用膜式抵抗
US5291781A (en) * 1991-04-12 1994-03-08 Yamatake-Honeywell Co., Ltd. Diaphragm-type sensor
JPH06230021A (ja) * 1993-02-01 1994-08-19 Ricoh Co Ltd 感熱式流速計及びこれを用いたフルイディック流量計
US6095084A (en) * 1996-02-02 2000-08-01 Applied Materials, Inc. High density plasma process chamber
JP3513041B2 (ja) * 1999-01-25 2004-03-31 三菱電機株式会社 流量センサ
JP2001176365A (ja) * 1999-12-15 2001-06-29 Mitsubishi Electric Corp 圧力スイッチ
WO2002010694A1 (en) * 2000-07-27 2002-02-07 Hitachi, Ltd. Thermal type air flowmeter
US6432812B1 (en) * 2001-07-16 2002-08-13 Lsi Logic Corporation Method of coupling capacitance reduction
DE10324292B4 (de) * 2003-05-21 2018-03-15 Robert Bosch Gmbh Messelement für einen Durchflusssensor, insbesondere einen Luftmassensensor für Brennkraftmaschinen
JP2004361271A (ja) * 2003-06-05 2004-12-24 Hitachi Ltd 熱式空気流量計
DE10345584A1 (de) * 2003-09-29 2005-04-28 Bosch Gmbh Robert Leiterplatte mit Kunststoffteil zur Aufnahme einer Messeinrichtung

Also Published As

Publication number Publication date
EP1870681A2 (en) 2007-12-26
EP1870681A3 (en) 2013-02-27
US7617723B2 (en) 2009-11-17
EP1870681B1 (en) 2016-08-24
US20080016958A1 (en) 2008-01-24
JP2008002896A (ja) 2008-01-10

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