JPH07505948A - 同心状に配置された電磁界を有する流量計 - Google Patents
同心状に配置された電磁界を有する流量計Info
- Publication number
- JPH07505948A JPH07505948A JP5513232A JP51323293A JPH07505948A JP H07505948 A JPH07505948 A JP H07505948A JP 5513232 A JP5513232 A JP 5513232A JP 51323293 A JP51323293 A JP 51323293A JP H07505948 A JPH07505948 A JP H07505948A
- Authority
- JP
- Japan
- Prior art keywords
- conduit
- pair
- magnetic field
- electrode
- electrodes
- 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
Links
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
- G01F1/56—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 electric or magnetic effects
- G01F1/58—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 electric or magnetic effects by electromagnetic flowmeters
- G01F1/588—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 electric or magnetic effects by electromagnetic flowmeters combined constructions of electrodes, coils or magnetic circuits, accessories therefor
-
- 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
- G01F1/002—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow wherein the flow is in an open channel
-
- 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
- G01F1/56—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 electric or magnetic effects
- G01F1/58—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 electric or magnetic effects by electromagnetic flowmeters
- G01F1/60—Circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims (17)
- 1.(a)流体流を受けるための導管24と、(b)前記導管の長手方向軸線の まわりに同心円状に伸びており、導管の内周に隣接する部分で強く、導管の中央 部に隣接する部分で弱い磁界を前記導管内につくるために導管の外部に配置され た手段(20,22)と、 (c)前記磁界内の前記導管上に配置された第1の電極手段(E1,E2)と、 (d)前記磁界によってほぼ影響を受けない場所で前記導管上に配置された第2 の電極手段(E0,70)であって、前記第1と第2の電極手段は、前記導管の 長手方向に間隔を置いた場所で前記流体に電気的に接触している第2の電極手段 (E0,70)と、(e)流体流の速度の関数である信号を発生するために前記 第1と第2の電極との間に接続された信号検出手段(42)とからなる導管内の 流体流を測定するための電磁流量計。
- 2.前記磁界化成手段は、前記導管の外側で正反対に対向するように配置され、 円周方向に間隔を置いた巻線手段の少なくとも第1の対を含み、巻線手段の前記 第1の対は、前記導管の円周方向に伸びている磁気軸線を有するように配置され ており、前記磁界生成手段は、さらに前記導管の長手方向の軸線に関して同じ方 向に同心円状に伸びる磁界をつくるために前記巻線手段を電気的に励磁するため の手段を有する請求項1に記載の装置。
- 3.前記第1の電極手段は、円周方向に間隔を置いて配置された少なくとも4つ の電極を含み、その内の2つの電極は、巻線手段の第1の対と前記導管の中心の 半径方向の中間に配置されており、他の2つの電極(E3,E4)は、巻線手段 の前記第1の対の間の空間内に配置されている請求項2に記載の装置。
- 4.巻線手段の前記第1の対の中間に円周方向に間隔を置いた関係で配置された 巻線手段(80,82)の第2の対であって、巻線手段の第2の対の磁束は、巻 線の第1の対と同じ方向に前記導管の円周方向に伸びており、前記他の2つの電 極は、巻線手段の前記第2の対と前記導管の中央の半径方向の中間に配置されて いる第2の対と、前記巻線手段の前記第1と第2の対を交互に励磁するための手 段とを有する請求項3に記載の装置。
- 5.巻線手段の前記第1の対と第2の対との間に円周方向にそれぞれ配置された 円周方向に間隔を置いた遷移巻線手段(84,86,88,90)と、前記巻線 手段を連続的に励磁するための励磁手段(91)とを含む請求項4に記載の装置 。
- 6.前記4つの電極E1′,E2′,E3′,E4 ′の各々は、それが関連 する巻線手段を越えた各端部で伸びるように導管の周縁方向に伸びる所定の大き さを有する請求項5に記載の装置。
- 7.前記電極の交互に配置された対(E1′′,E2′′;E3′′,E4′′ )は、前記導管に関して長手方向に間隔を置いており、前記電極の円周方向の寸 法は、連続する電極の隣接端部が重複するような寸法である請求項6に記載の装 置。
- 8.前記巻線手段の各々は、それぞれ対応する電極(142)に関連する複数の 扇状部(140)を含む請求項5に記載の装置。
- 9.前記第1の巻線手段は、その磁界が導管の円周方向に伸びる一対の環状巻線 (20,22)を有する請求項2に記載の装置。
- 10.前記磁界生成手段は、前記導管の外側で正反対に対向するような関係に配 置され、円周方向に間隔を置いたかご形の巻線(150,152)の少なくとも 第1の対と、前記導管の長手方向の軸線に関して同じ方向に同心円状に伸びる一 対の磁界をつくるために前記かご形巻線を電気的に励磁するための手段を有する 請求項2に記載の装置。
- 11.前記導管(160)は、通常ほぼ平行であり、前記第1の対の巻線手段は 、前記専管と正反対の位置で水平方向に間隔を置いており、それによって部分的 に充填した導管及び開放溝内の流体流の速度を測定することが可能になる請求項 2に記載の装置。
- 12.前記第2の電極手段は、前記導管内の中央に取り付けられた少なくとも1 つの電極(70)を有する請求項1に記載の装置。
- 13.前記第1の電極手段は、少なくとも1つのほぼ弧状の電極を含み.その電 極による発生磁界の軸線は導管の長手方向の中心に隣接している請求項1に記載 の装置。
- 14.前記弧状の電極は、弧形状に配置された複数の電極部分(200)と、前 記部分を電気的に接続する手段とを有する請求項13に記載の装置。
- 15.前記接続手段は、複数の緩衝増幅器を含む請求項14に記載の装置。
- 16.前記緩衝増幅器の内少なくともいくつかの増幅器は、可変利得調整手段を 含む請求項15に記載の装置。
- 17.前記磁界のうち少なくとも1つの磁界を成形するために整形巻線手段(1 59)を含む請求項10に記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US825,504 | 1992-01-24 | ||
US07/825,504 US5263374A (en) | 1992-01-24 | 1992-01-24 | Flowmeter with concentrically arranged electromagnetic field |
PCT/US1993/000006 WO1993015379A1 (en) | 1992-01-24 | 1993-01-07 | Flowmeter with concentrically arranged electromagnetic field |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07505948A true JPH07505948A (ja) | 1995-06-29 |
JP3188462B2 JP3188462B2 (ja) | 2001-07-16 |
Family
ID=25244168
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51323293A Expired - Fee Related JP3188462B2 (ja) | 1992-01-24 | 1993-01-07 | 同心状に配置された電磁界を有する流量計 |
Country Status (6)
Country | Link |
---|---|
US (1) | US5263374A (ja) |
EP (1) | EP0634002B1 (ja) |
JP (1) | JP3188462B2 (ja) |
AU (1) | AU3429893A (ja) |
DE (2) | DE4390337C2 (ja) |
WO (1) | WO1993015379A1 (ja) |
Families Citing this family (15)
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GB2292613A (en) * | 1994-08-01 | 1996-02-28 | Edward Hall Higham | Multiple electrode electromagnetic flowmeters |
US7155983B2 (en) | 2005-02-04 | 2007-01-02 | Entegris, Inc. | Magnetic flow meter with unibody construction and conductive polymer electrodes |
US7523673B1 (en) * | 2007-05-23 | 2009-04-28 | The United States Of America As Represented By The United States Department Of Energy | Ionization based multi-directional flow sensor |
US8245580B2 (en) * | 2009-10-02 | 2012-08-21 | Rosemount Inc. | Compliant coil form |
GB201006409D0 (en) * | 2010-04-17 | 2010-06-02 | Univ Huddersfield | Means and method for mearsuring the flow rate of fluid |
JP5818415B2 (ja) * | 2010-08-30 | 2015-11-18 | 株式会社東芝 | 電磁流量計測システムの校正装置 |
US8434371B2 (en) | 2010-10-14 | 2013-05-07 | Brickhouse Innovations, Llc | Electromagnetic fluid velocity sensor with adjustable electrodes |
US9429588B2 (en) | 2012-08-16 | 2016-08-30 | Brickhouse Innovations, Llc | Electromagnetic boat speedometer having removable electrodes |
US9021890B2 (en) | 2012-09-26 | 2015-05-05 | Rosemount Inc. | Magnetic flowmeter with multiple coils |
US8991264B2 (en) | 2012-09-26 | 2015-03-31 | Rosemount Inc. | Integrally molded magnetic flowmeter |
RU2531156C1 (ru) * | 2013-03-14 | 2014-10-20 | Общество с ограниченной ответственностью "Геофизмаш" | Способ измерения скорости движения электропроводящей среды и устройство для его осуществления |
US11365995B2 (en) * | 2018-09-28 | 2022-06-21 | Georg Fischer Signet Llc | Magnetic flowmeter including auxiliary electrodes upstream and downstream of the pair of measuring electrodes and an adjustable brace |
DE102019123413A1 (de) * | 2019-09-02 | 2021-03-04 | Endress+Hauser Flowtec Ag | Magnetisch-induktives Durchflussmessgerät |
EP4067832A1 (en) * | 2021-03-31 | 2022-10-05 | Siemens Aktiengesellschaft | An electromagnetic flowmeter with a plurality of coils |
EP4075103A1 (en) * | 2021-04-15 | 2022-10-19 | Siemens Aktiengesellschaft | An electromagnetic flowmeter with primary and secondary pairs of coils |
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-
1992
- 1992-01-24 US US07/825,504 patent/US5263374A/en not_active Expired - Lifetime
-
1993
- 1993-01-07 DE DE4390337A patent/DE4390337C2/de not_active Expired - Lifetime
- 1993-01-07 JP JP51323293A patent/JP3188462B2/ja not_active Expired - Fee Related
- 1993-01-07 AU AU34298/93A patent/AU3429893A/en not_active Abandoned
- 1993-01-07 DE DE4390337T patent/DE4390337T1/de active Pending
- 1993-01-07 WO PCT/US1993/000006 patent/WO1993015379A1/en active IP Right Grant
- 1993-01-07 EP EP93902891A patent/EP0634002B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
WO1993015379A1 (en) | 1993-08-05 |
US5263374A (en) | 1993-11-23 |
DE4390337T1 (de) | 1994-11-10 |
DE4390337C2 (de) | 1999-01-21 |
EP0634002B1 (en) | 1998-04-08 |
AU3429893A (en) | 1993-09-01 |
JP3188462B2 (ja) | 2001-07-16 |
EP0634002A1 (en) | 1995-01-18 |
EP0634002A4 (en) | 1994-09-05 |
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