JPH11510607A - 磁気誘導型流量計 - Google Patents
磁気誘導型流量計Info
- Publication number
- JPH11510607A JPH11510607A JP9536758A JP53675897A JPH11510607A JP H11510607 A JPH11510607 A JP H11510607A JP 9536758 A JP9536758 A JP 9536758A JP 53675897 A JP53675897 A JP 53675897A JP H11510607 A JPH11510607 A JP H11510607A
- Authority
- JP
- Japan
- Prior art keywords
- medium
- capacitance
- capacitor plate
- control
- evaluation circuit
- 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
- 230000006698 induction Effects 0.000 title claims abstract description 13
- 239000003990 capacitor Substances 0.000 claims abstract description 44
- 238000011156 evaluation Methods 0.000 claims abstract description 30
- 238000005259 measurement Methods 0.000 claims description 11
- 230000003071 parasitic effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- G01F1/584—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 electrodes, 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.磁気誘導型流量計と組み合わせて使用する、管路(2)内の導電媒体(1 )の位相成分検出装置であって、 少なくとも1つのコンデンサ板(3)と、該コンデンサ板(3)と前記媒体( 1)との間の絶縁層(8)と、制御および評価回路を有し、該制御および評価回 路はコンデンサ板(3)に交流電圧を印加する形式の装置において、 制御および評価回路は、コンデンサ板(3)と媒体(1)との間の容量を位相 成分に対する尺度として検出する、ことを特徴とする検出装置。 2.制御および評価回路は、コンデンサ板(3)と媒体(4)との間の容量に 基づいて閾値弁別をおこなう、請求項1記載の装置。 3.制御および評価回路はコンデンサ板(3)と媒体(1)との間の容量を量 的に評価する、請求項1または2記載の装置。 4.交流電圧は2つのコンデンサ板(3)の間に印加される、請求項1から3 までのいずれか1項記載の装置。 5.交流電圧はそれぞれのコンデンサ板(3)と基準電位(9)との間に印加 され、媒体(1)はアース手段によって基準電位(9)と接続されている、請求 項1から3までのいずれか1項記載の装置。 6.媒体(1)は、容量的に結合され、媒体(1)から絶縁された電極を介し て基準電位(9)と接続されている、請求項5記載の装置。 7.コンデンサ板(3)と媒体(1)との間の容量のインピーダンスを交流電 圧の周波数と関連して、高くても基準電位(9)に対する媒体(1)のオーム抵 抗のオーダーにする、請求項5または6記載の装置。 8.コンデンサ板(3)と媒体(1)との間の容量は、少なくとも2つのキャ パシタンス(10,11)を有する容量性分圧器(12)の第1のキャパシタン ス(10)を形成し、 制御および評価回路は測定信号を容量性分圧器(12)の中間タップ(13) から取り出す、請求項1から7までのいずれか1項記載の装置。 9.容量性分圧器(12)の第2のキャパシタンス(1)は第1のキャパシタ ンス(10)よりも小さい、請求項8記載の装置。 10.制御および評価回路の寄生容量(15)が第2のキャパシタンスを形成す る、請求項8または9記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19615140.6 | 1996-04-17 | ||
DE19615140A DE19615140C2 (de) | 1996-04-17 | 1996-04-17 | Magnetisch - induktives Durchflußmeßgerät |
PCT/EP1997/001936 WO1997039313A1 (de) | 1996-04-17 | 1997-04-17 | Vorrichtung zur bestimmung des phasenanteils eines leitfähigen mediums in einer leitung |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11510607A true JPH11510607A (ja) | 1999-09-14 |
JP3171857B2 JP3171857B2 (ja) | 2001-06-04 |
Family
ID=7791519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP53675897A Expired - Fee Related JP3171857B2 (ja) | 1996-04-17 | 1997-04-17 | 磁気誘導型流量計 |
Country Status (5)
Country | Link |
---|---|
US (1) | US6092428A (ja) |
EP (1) | EP0834057B1 (ja) |
JP (1) | JP3171857B2 (ja) |
DE (1) | DE19655107C2 (ja) |
WO (1) | WO1997039313A1 (ja) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19907864A1 (de) * | 1999-02-23 | 2000-09-14 | Krohne Messtechnik Kg | Magnetisch-induktives Durchflußmeßgerät |
EP1219966A3 (de) * | 2000-11-04 | 2003-10-22 | ABB PATENT GmbH | Einrichtung zur Messung kleiner Spannungssignale |
CN101915788A (zh) * | 2010-07-07 | 2010-12-15 | 西安交通大学 | 用于多相流持液率测量的具有液体电极的电容式传感器 |
DE102012002013B4 (de) * | 2012-02-03 | 2015-09-10 | Krohne Messtechnik Gmbh | Prüfung einer Messgerätanordnung, entsprechende Messgerätanordnung und Prüfanordnung |
DE102012006891B4 (de) | 2012-04-05 | 2019-05-23 | Krohne Ag | Magnetisch-induktives Durchflussmessgerät |
DE102012213507B3 (de) * | 2012-07-31 | 2013-08-22 | Ifm Electronic Gmbh | Magnetisch-induktives Durchflussmessgerät |
DE102012015038B3 (de) * | 2012-07-31 | 2013-11-21 | Ifm Electronic Gmbh | Magentisch-induktives Durchflussmessgerät |
DE102012017904A1 (de) * | 2012-08-21 | 2014-03-20 | Krohne Ag | Magnetisch-induktives Durchflussmessgerät und Verfahren zu seiner Herstellung |
US10352743B1 (en) * | 2013-09-26 | 2019-07-16 | Sensors That Count, L.L.C. | Flow sensor based on electrical capacity |
US11231305B2 (en) * | 2013-09-26 | 2022-01-25 | Amvac Chemical Corporation | Flow sensor apparatus for monitoring a directed stream of an agricultural product |
US9766104B2 (en) | 2013-10-17 | 2017-09-19 | Krohne Ag | Magneto-inductive flow-measuring system |
DE102013019182A1 (de) | 2013-10-17 | 2015-05-07 | Krohne Ag | Messrohr für magnetisch-induktive Durchflussmesssysteme |
DE102015116672A1 (de) | 2015-01-05 | 2016-07-07 | Krohne Ag | Durchflussmessgerät |
EP3043153B1 (de) | 2015-01-05 | 2020-01-01 | Krohne AG | Durchflussmessgerät |
DE102015116675A1 (de) | 2015-01-13 | 2016-07-14 | Krohne Ag | Magnetisch-induktives Durchflussmessgerät |
DE102015116673A1 (de) | 2015-01-13 | 2016-07-14 | Krohne Ag | Magnetisch-induktives Durchflussmessgerät |
EP3045874B1 (de) | 2015-01-14 | 2020-01-08 | Krohne AG | Magnetisch-induktives durchflussmessgerät |
DE102015116674B4 (de) | 2015-01-14 | 2021-08-19 | Krohne Ag | Magnetisch-induktives Durchflussmessgerät |
EP3045875B1 (de) | 2015-01-14 | 2020-01-15 | Krohne AG | Magnetisch-induktives durchflussmessgerät |
DE102015116676A1 (de) | 2015-01-20 | 2016-07-21 | Krohne Ag | Magnetisch-induktives Durchflussmessgerät und Verfahren zum Herstellen einer Messelektrode |
EP3048431B1 (de) | 2015-01-20 | 2020-07-29 | Krohne AG | Magnetisch-induktives durchflussmessgerät und verfahren zur herstellung einer messelektrode |
DE102017112950A1 (de) * | 2017-06-13 | 2018-12-13 | Krohne Messtechnik Gmbh | Magnetisch-induktives Durchflussmessgerät und Verfahren zum Betreiben eines magnetisch-induktiven Durchflussmessgerätes |
JP6940434B2 (ja) * | 2018-03-13 | 2021-09-29 | アズビル株式会社 | 容量式電磁流量計 |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5625155A (en) * | 1901-09-03 | 1997-04-29 | Aichi Tokei Denki Co., Ltd. | Electromagnetic flowmeter |
US3639835A (en) * | 1967-01-27 | 1972-02-01 | Nasa | Capacitive tank gaging apparatus being independent of liquid distribution |
US3489007A (en) * | 1968-05-06 | 1970-01-13 | Vincent J Cushing | Electromagnetic mass flowmeter |
DE2223055C3 (de) * | 1972-05-12 | 1979-02-15 | Fischer & Porter Gmbh, 3400 Goettingen | Induktiver Strömungsmesser |
DE2454469C3 (de) * | 1974-11-16 | 1981-07-23 | Fischer & Porter GmbH, 3400 Göttingen | Induktiver Durchflußmesser |
US3991612A (en) * | 1975-10-14 | 1976-11-16 | Fischer & Porter Co. | Electromagnetic flowmeter usable in less-than full fluid lines |
US4036052A (en) * | 1976-07-30 | 1977-07-19 | Fischer & Porter Co. | Electromagnetic flowmeter usable in less-than-full fluid lines |
US4122714A (en) * | 1977-10-27 | 1978-10-31 | Hokushin Electric Works, Ltd. | Magnetic current meter for open channel flow measurement |
GB2064130B (en) * | 1979-11-08 | 1983-09-14 | Hemp J | Electromagnetic channel flowmeter |
DE3133330C2 (de) * | 1981-08-22 | 1983-11-24 | Eckardt Ag, 7000 Stuttgart | Magnetisch-induktiver Durchflußmesser |
US4785672A (en) * | 1986-02-14 | 1988-11-22 | Fischer & Porter Co. | Printed circuit capacitance electrodes |
DE3810034A1 (de) * | 1988-03-25 | 1989-10-05 | Kieninger & Obergfell | Magnetinduktiver durchflussmengenmesser |
DE3829063C3 (de) * | 1988-08-26 | 1998-01-29 | Danfoss As | Verfahren zur Drift-Erkennung eines Meßwertumformers bei magnetisch-induktiver Durchflußmessung und magnetisch-induktiver Durchflußmesser |
DE3903068A1 (de) * | 1989-02-02 | 1990-08-16 | Turbo Werk Messtechnik Gmbh | Induktiver durchflussmesser |
GB9109074D0 (en) * | 1991-04-26 | 1991-06-12 | Shell Int Research | A method and apparatus for measuring the gas and the liquid flowrate and the watercut of multiphase mixtures of oil,water and gas flowing through a pipeline |
GB9109957D0 (en) * | 1991-05-08 | 1991-07-03 | Schlumberger Ltd | Capacitance flow meter |
US5289725A (en) * | 1991-07-31 | 1994-03-01 | The Foxboro Company | Monolithic flow tube with improved dielectric properties for use with a magnetic flowmeter |
DE69221595T2 (de) * | 1991-12-18 | 1997-12-11 | Aichi Tokei Denki Kk | Elektromagnetischer Durchflussmesser |
EP0596153A1 (de) * | 1992-11-06 | 1994-05-11 | TURBO-WERK Messtechnik GmbH | Induktiver Durchflussmesser |
JP3031096B2 (ja) * | 1993-01-29 | 2000-04-10 | 横河電機株式会社 | 容量式電磁流量計 |
DE4312813C2 (de) * | 1993-04-20 | 1998-03-26 | Kuipers Ulrich Prof Dr Ing | Anordnung zur kapazitiven Füllstandsmessung |
DE4317366C2 (de) * | 1993-05-25 | 1997-04-17 | Ultrakust Electronic Gmbh | Verfahren und Vorrichtung zur Bestimmung eines Volumenstromes |
JPH0886674A (ja) * | 1994-09-20 | 1996-04-02 | Yokogawa Electric Corp | 容量式電磁流量計 |
DE29511556U1 (de) * | 1995-07-18 | 1995-09-28 | Doll Friedhelm Dipl Ing | Induktiver Durchflußmesser |
DE19531124C2 (de) * | 1995-08-24 | 1997-08-14 | Krohne Ag | Verfahren zur Bestimmung des Phasenanteils eines Mediums in offenen und geschlossenen Leitungen |
-
1996
- 1996-04-17 DE DE19655107A patent/DE19655107C2/de not_active Expired - Fee Related
-
1997
- 1997-04-17 WO PCT/EP1997/001936 patent/WO1997039313A1/de active Application Filing
- 1997-04-17 JP JP53675897A patent/JP3171857B2/ja not_active Expired - Fee Related
- 1997-04-17 EP EP97925919A patent/EP0834057B1/de not_active Expired - Lifetime
- 1997-04-17 US US08/981,246 patent/US6092428A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0834057A1 (de) | 1998-04-08 |
DE19655107C2 (de) | 2002-11-14 |
EP0834057B1 (de) | 2013-03-27 |
JP3171857B2 (ja) | 2001-06-04 |
US6092428A (en) | 2000-07-25 |
WO1997039313A1 (de) | 1997-10-23 |
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