JP2008002896A - 熱式流量計測装置 - Google Patents
熱式流量計測装置 Download PDFInfo
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- JP2008002896A JP2008002896A JP2006171594A JP2006171594A JP2008002896A JP 2008002896 A JP2008002896 A JP 2008002896A JP 2006171594 A JP2006171594 A JP 2006171594A JP 2006171594 A JP2006171594 A JP 2006171594A JP 2008002896 A JP2008002896 A JP 2008002896A
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- heating element
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- 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
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- 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
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
【解決手段】本発明による熱式流量計測装置の検出素子1は、シリコンやセラミック等で構成される平板基板にダイアフラム2を形成し、ダイアフラム2の表面には測定空気流の温度と所定の温度差に加熱される発熱体として発熱抵抗体6と、発熱抵抗体6の温度を検出する発熱体温度検出抵抗体5と、発熱抵抗体6の両側に温度検出手段として温度検出抵抗体3、4、7、8と、発熱抵抗体6を電気的に接続する配線部18、24と接続端子31、32と、配線部15、16と接続端子29、30と、配線部10〜13、19〜22と接続端子25〜28、33〜36と、配線部13と15の間の配線パターン14と、配線部16と18の間の配線パターン17と、配線部22と24の間の配線パターン23と、平板基板の表面と電気的な接続を行なう配線層9により構成される。
【選択図】図1
Description
1‥検出素子、2‥ダイアフラム、3‥温度検出抵抗体、4‥温度検出抵抗体、5‥発熱体温度検出抵抗体、6‥発熱抵抗体、7‥温度検出抵抗体、8‥温度検出抵抗体、9‥配線パターン、10‥配線部、11‥配線部、12‥配線部、13‥配線部、14‥配線パターン、15‥配線部、16‥配線部、17‥配線パターン、18‥配線部、19‥配線部、20‥配線部、21‥配線部、22‥配線部、23‥配線パターン、24‥配線部、25‥接続端子、26‥接続端子、27‥接続端子、28‥接続端子、29‥接続端子、30‥接続端子、31‥接続端子、32‥接続端子、33‥接続端子、34‥接続端子、35‥接続端子、36‥接続端子、37‥平板基板、38‥絶縁膜、39‥保護膜、40‥拡散層、41‥差動増幅器、42‥トランジスタ、43‥固定抵抗、44‥基準電圧源、45‥差動増幅器、46‥静電容量、47‥静電容量、48‥静電容量、49‥パルス発生器、50‥パルス幅変調回路、51‥比較器
Claims (7)
- 流体中に配置され電流を流すことによって発熱する発熱体と、
前記発熱体を間にして流体の通流方向にそれぞれ設けられた第1および第2の温度検出手段と、
前記発熱体と電気的に接続される発熱体接続端子と、
前記第1および第2の温度検出手段と電気的に接続される第1および第2の温度検出手段接続端子と、
前記発熱体と前記発熱体接続端子とを電気的に接続する発熱体配線部と、
前記第1および第2の温度検出手段と前記第1および第2の温度検出手段接続端子とを電気的に接続する第1および第2の温度検出手段配線部とを有する熱式流量計測装置において、
前記発熱体配線部と、第1および第2の温度検出手段配線部との間に一定電位に保持された配線パターンを有することを特徴とする熱式流量計測装置。 - 請求項1に記載の熱式流量計測装置おいて、
前記発熱体の近傍に配置され前記発熱体の温度を検出する発熱体温度検出手段と、
前記発熱体温度検出手段と電気的に接続される発熱体温度検出手段接続端子と、
前記発熱体温度検出手段と前記発熱体温度検出手段接続端子とを電気的に接続する発熱体温度検出手段配線部と、
前記発熱体配線部と前記発熱体温度検出手段配線部との間に一定電位に保持された配線パターンを有することを特徴とする熱式流量計測装置。 - 請求項2に記載の熱式流量計測装置おいて、
前記発熱体温度検出手段配線部と、
前記第1および第2の温度検出手段配線部との間に一定電位に保持された配線パターンを有することを特徴とする熱式流量計測装置。 - 請求項1〜3に記載の熱式流量計測装置おいて、
前記発熱体と前記発熱体配線部とを構成する薄膜層と、
絶縁層を介在させて前記薄膜層を固定する導電性の平板基板とを有し、
前記配線パターンの幅が前記平板基板の厚み以上であることを特徴とする熱式流量計測装置。 - 請求項4に記載の熱式流量計測装置おいて、
前記配線パターンは前記平板基板に電気的に接続されることを特徴とする熱式流量計測装置。 - 請求項5に記載の熱式流量計測装置おいて、
前記配線パターンには前記平板基板に電気的に接続する接続部が連続的に配置されることを特徴とする熱式流量計測装置。 - 請求項4〜6に記載の熱式流量計測装置おいて、
前記平板基板は、拡散層を形成して低抵抗化されていることを特徴とする熱式流量計測装置。
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 true JP2008002896A (ja) | 2008-01-10 |
JP2008002896A5 JP2008002896A5 (ja) | 2008-06-19 |
JP4226616B2 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 (ja) |
EP (1) | EP1870681B1 (ja) |
JP (1) | JP4226616B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2290357A1 (en) | 2009-08-28 | 2011-03-02 | Hitachi Automotive Systems, Ltd. | Thermal humidity sensor |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5152292B2 (ja) * | 2010-10-06 | 2013-02-27 | 株式会社デンソー | 流量計測装置 |
CN107003165B (zh) * | 2014-11-28 | 2021-03-09 | 日立汽车***株式会社 | 热式流量传感器 |
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)
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 |
CN1272606C (zh) * | 2000-07-27 | 2006-08-30 | 株式会社日立制作所 | 热式空气流量计 |
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 |
-
2006
- 2006-06-21 JP JP2006171594A patent/JP4226616B2/ja not_active Expired - Fee Related
-
2007
- 2007-06-20 US US11/765,736 patent/US7617723B2/en not_active Expired - Fee Related
- 2007-06-21 EP EP07012215.5A patent/EP1870681B1/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2290357A1 (en) | 2009-08-28 | 2011-03-02 | Hitachi Automotive Systems, Ltd. | Thermal humidity sensor |
US8359919B2 (en) | 2009-08-28 | 2013-01-29 | Hitachi Automotive Systems, Ltd. | Thermal humidity sensor |
Also Published As
Publication number | Publication date |
---|---|
EP1870681A3 (en) | 2013-02-27 |
EP1870681A2 (en) | 2007-12-26 |
US7617723B2 (en) | 2009-11-17 |
JP4226616B2 (ja) | 2009-02-18 |
EP1870681B1 (en) | 2016-08-24 |
US20080016958A1 (en) | 2008-01-24 |
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