JP5337260B2 - コイル接地経路検出機能付き磁気流量計 - Google Patents
コイル接地経路検出機能付き磁気流量計 Download PDFInfo
- Publication number
- JP5337260B2 JP5337260B2 JP2011553002A JP2011553002A JP5337260B2 JP 5337260 B2 JP5337260 B2 JP 5337260B2 JP 2011553002 A JP2011553002 A JP 2011553002A JP 2011553002 A JP2011553002 A JP 2011553002A JP 5337260 B2 JP5337260 B2 JP 5337260B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- diagnostic circuit
- magnetic
- ground
- flow
- 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
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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
- G01F1/56—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
- G01F1/586—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 constructions of coils, magnetic circuits, accessories therefor
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Measuring Volume Flow (AREA)
Description
Claims (10)
- プロセス流体の流れを受け入れるために配置された流管と、
前記流管に隣接して前記プロセス流体に磁界を作用させるために配置されたコイルと、
前記コイルに電流を供給するように構成されたH型ブリッジを備えている電源と、
作用された磁界に応じた流管中の電位差であって、前記流管を通過するプロセス流体の流速を示す電位差を検知するために配置された検知電極と、
前記コイルおよび電気的接地間の電気的経路を示す出力を有する診断回路とを備え、
前記診断回路が、前記H型ブリッジのスイッチの動作を制御する磁気流量計。 - 前記診断回路が、前記コイルからの電流戻り経路の電気的接続部を開く請求項1記載の磁気流量計。
- 前記診断回路が、電源および前記コイル間の電気的接続部を閉じる請求項1記載の磁気流量計。
- 前記診断回路が、受信命令に応答して動作する請求項1記載の磁気流量計。
- 前記診断回路が、前記コイルおよび接地間の電気抵抗を周期的に測定する請求項1記載の磁気流量計。
- 前記診断回路が、前記コイルに与えられる駆動信号の半サイクルの間、前記コイルおよび接地間の電気抵抗を測定する請求項1記載の磁気流量計。
- 前記診断回路が、検知抵抗を通る電流を測定する請求項1記載の磁気流量計。
- 前記診断回路が、前記コイルおよび接地間の電気抵抗に関連する測定値を比較し、測定値を閾値と比較する請求項1記載の磁気流量計。
- 前記診断回路が、前記コイルおよび電気的接地間の電気抵抗に基づいて流量測定値を補正する請求項1記載の磁気流量計。
- 前記診断回路からの出力が2線プロセスループに接続される請求項1記載の磁気流量計。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/398,302 | 2009-03-05 | ||
US12/398,302 US7921733B2 (en) | 2009-03-05 | 2009-03-05 | Magnetic flowmeter with coil ground path detection |
PCT/US2010/025728 WO2010101807A1 (en) | 2009-03-05 | 2010-03-01 | Magnetic flowmeter with coil ground path detection |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2012519849A JP2012519849A (ja) | 2012-08-30 |
JP5337260B2 true JP5337260B2 (ja) | 2013-11-06 |
Family
ID=42235678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2011553002A Expired - Fee Related JP5337260B2 (ja) | 2009-03-05 | 2010-03-01 | コイル接地経路検出機能付き磁気流量計 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7921733B2 (ja) |
EP (1) | EP2404146B1 (ja) |
JP (1) | JP5337260B2 (ja) |
CN (1) | CN102341680B (ja) |
WO (1) | WO2010101807A1 (ja) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8991264B2 (en) | 2012-09-26 | 2015-03-31 | Rosemount Inc. | Integrally molded magnetic flowmeter |
US9021890B2 (en) | 2012-09-26 | 2015-05-05 | Rosemount Inc. | Magnetic flowmeter with multiple coils |
US9696188B2 (en) | 2013-03-14 | 2017-07-04 | Rosemount Inc. | Magnetic flowmeter with automatic adjustment based on sensed complex impedance |
JP6466446B2 (ja) * | 2013-08-06 | 2019-02-06 | ベドロック・オートメーション・プラットフォームズ・インコーポレーテッド | スマート電力システム |
US9395221B2 (en) | 2013-09-26 | 2016-07-19 | Rosemount Inc. | Magnetic flowmeter with saturation detection of the measurement circuitry |
US10663331B2 (en) * | 2013-09-26 | 2020-05-26 | Rosemount Inc. | Magnetic flowmeter with power limit and over-current detection |
US9163968B2 (en) * | 2013-09-26 | 2015-10-20 | Rosemount Inc. | Magnetic flowmeter with drive signal diagnostics |
JP6183309B2 (ja) * | 2014-07-11 | 2017-08-23 | 横河電機株式会社 | 流量計及び絶縁劣化診断システム |
CN104633385B (zh) * | 2014-12-07 | 2017-01-25 | 中国石油化工股份有限公司 | 含蜡原油输送管道 |
US10132665B2 (en) * | 2015-02-05 | 2018-11-20 | Schneider Electric Systems Usa, Inc. | Electromagnetic flowmeter and method of using same |
US11085803B2 (en) * | 2015-09-24 | 2021-08-10 | Micro Motion, Inc. | Entrained fluid detection diagnostic |
US11493373B2 (en) * | 2017-12-29 | 2022-11-08 | Abb Schweiz Ag | Clamp on electromagnetic flowmeter for determining flow in a pipe using leakage current compensation |
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 |
US10712184B1 (en) | 2019-01-09 | 2020-07-14 | Georg Fischer Signet Llc | Magnetic flowmeter assembly having independent coil drive and control system |
US11204267B2 (en) | 2019-09-05 | 2021-12-21 | Micro Motion, Inc. | Continuously adaptive digital coil driver for magnetic flowmeter |
US11181404B2 (en) | 2019-09-05 | 2021-11-23 | Micro Motion, Inc. | Magnetic flowmeter with a current sampling circuit sampling coil current pulses at a sampling frequency |
US11333537B2 (en) | 2019-09-05 | 2022-05-17 | Micro Motion, Inc. | Load leveling boost supply for magnetic flowmeter |
US11204268B2 (en) | 2019-09-05 | 2021-12-21 | Micro Motion, Inc. | Magnetic flowmeter having a programmable bi-directional current generator |
US11761803B2 (en) * | 2021-04-20 | 2023-09-19 | Schneider Electric Systems Usa, Inc. | Sensor diagnostics |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2081449B (en) | 1980-08-04 | 1984-09-26 | Aichi Tokei Denki Kk | Electromagnetic flow meters |
US4563904A (en) | 1984-09-12 | 1986-01-14 | Fischer & Porter Company | Excitation circuit for electromagnetic flowmeter |
US4916381A (en) * | 1988-05-12 | 1990-04-10 | Rosemount Inc. | Current source for a variable load with an inductive component |
EP0521169B1 (de) * | 1991-06-08 | 1995-11-08 | Endress + Hauser Flowtec AG | Magnetisch-induktiver Durchflussmesser |
US5372045A (en) * | 1993-02-12 | 1994-12-13 | Rosemount Inc. | Bridge pulse controlled constant current driver for magnetic flowmeter |
US5325728A (en) * | 1993-06-22 | 1994-07-05 | Medtronic, Inc. | Electromagnetic flow meter |
US5639970A (en) | 1995-07-17 | 1997-06-17 | Rosemount Inc. | Current selection circuitry for magnetic flowmeter |
GB2348011B (en) * | 1996-01-17 | 2000-12-06 | Abb Instrumentation Ltd | Calibration of flow meters |
US6611775B1 (en) | 1998-12-10 | 2003-08-26 | Rosemount Inc. | Electrode leakage diagnostics in a magnetic flow meter |
DE19907864A1 (de) * | 1999-02-23 | 2000-09-14 | Krohne Messtechnik Kg | Magnetisch-induktives Durchflußmeßgerät |
DE19917261C5 (de) * | 1999-04-16 | 2010-09-09 | Siemens Flow Instruments A/S | Elektromagnetische Durchflußmesseranordnung |
JP3915459B2 (ja) * | 2001-09-20 | 2007-05-16 | 横河電機株式会社 | 電磁流量計 |
JP2003106879A (ja) * | 2001-10-01 | 2003-04-09 | Yokogawa Electric Corp | 電磁流量計 |
US6920799B1 (en) * | 2004-04-15 | 2005-07-26 | Rosemount Inc. | Magnetic flow meter with reference electrode |
US7073393B2 (en) | 2004-11-01 | 2006-07-11 | Rosemount Inc. | Magnetic flowmeter with built-in simulator |
EP2074385B2 (en) | 2006-09-29 | 2022-07-06 | Rosemount Inc. | Magnetic flowmeter with verification |
JP5163852B2 (ja) * | 2007-03-13 | 2013-03-13 | 横河電機株式会社 | 電磁流量計とそのゼロ点測定方法 |
US7619418B2 (en) * | 2007-04-19 | 2009-11-17 | Rosemount Inc. | Magnetic flowmeter output verification |
-
2009
- 2009-03-05 US US12/398,302 patent/US7921733B2/en active Active
-
2010
- 2010-03-01 WO PCT/US2010/025728 patent/WO2010101807A1/en active Application Filing
- 2010-03-01 CN CN201080010275.3A patent/CN102341680B/zh active Active
- 2010-03-01 JP JP2011553002A patent/JP5337260B2/ja not_active Expired - Fee Related
- 2010-03-01 EP EP10705773.9A patent/EP2404146B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
JP2012519849A (ja) | 2012-08-30 |
CN102341680B (zh) | 2014-07-30 |
WO2010101807A1 (en) | 2010-09-10 |
US20100224008A1 (en) | 2010-09-09 |
CN102341680A (zh) | 2012-02-01 |
US7921733B2 (en) | 2011-04-12 |
EP2404146B1 (en) | 2019-05-08 |
EP2404146A1 (en) | 2012-01-11 |
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