DE102006006154A1 - Field compensation method for use with magnetically inductive flow meters, involves alternate adjustment of maximum or minimum signal voltage during arrangement of several spools - Google Patents
Field compensation method for use with magnetically inductive flow meters, involves alternate adjustment of maximum or minimum signal voltage during arrangement of several spools Download PDFInfo
- Publication number
- DE102006006154A1 DE102006006154A1 DE102006006154A DE102006006154A DE102006006154A1 DE 102006006154 A1 DE102006006154 A1 DE 102006006154A1 DE 102006006154 A DE102006006154 A DE 102006006154A DE 102006006154 A DE102006006154 A DE 102006006154A DE 102006006154 A1 DE102006006154 A1 DE 102006006154A1
- Authority
- DE
- Germany
- Prior art keywords
- maximum
- signal voltage
- minimum signal
- compensation method
- voltage during
- 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.)
- Ceased
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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Thermal Sciences (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Die Erfindung bezieht sich auf das bekannte Messprinzip, dass bei magnetischen induktiven Durchflussmessern (IDM) zur Anwendung kommt. Der zur Messung der Strömungsgeschwindigkeit ausgenutzte physikalische Effekt ist das Induktionsgesetz.The The invention relates to the known measuring principle that in magnetic inductive flowmeters (IDM) is used. The to Measuring the flow rate exploited physical effect is the law of induction.
Wird
ein elektrisch leitfähiger
Messstoff durch ein Magnetfeld B → geleitet, so entsteht im Messstoff
ein elektrisches Feld E → senkrecht zur Strömungsrichtung v → und zur Magnetfeldeinrichtung.
Die Idee zur Erfindung liegt darin, mit dem vorhandenen Komponenten eines bekannten IDM zusätzliche Informationen, nämlich die über die Füllhöhe des Messstoffes im Messrohr, zu generieren. Hierdurch wird es ermöglicht ein kostengünstiges kombiniertes Messverfahren zu realisieren.The Idea of the invention lies in the existing components of a known IDM additional Information, namely the above the filling level of the medium in the measuring tube, to generate. This makes it possible inexpensive combined To realize measuring method.
Dies
geschieht dadurch, dass die einzeln angesteuerten Spulen wechselweise
so angeregt werden, dass sich eine maximale oder minimale Signalspannung
Uo einstellt.
Der Erfindung liegt somit die Aufgabe zugrunde, ein Feldkompensationsverfahren dahingehend zu gestalten, dass damit Füllhöhen in induktiven Durchflussmessern ermittelt werden können.Of the The invention is therefore based on the object, a field compensation method to be designed so that it fill levels in inductive flow meters can be determined.
Die gestellte Aufgabe ist erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst.The Asked object is inventively by the characterizing Characteristics of claim 1 solved.
Kern der Erfindung ist dabei, dass bei einer Anordnung mehrerer Spulen, dieselben wechselweise so angeregt werden, dass sich eine maximale oder minimale Signalspannung Uo einstellt, und aus dem Verhältnis dieser zugehörigen korrelierten Spulenströme funktional die Füllhöhe des Messstoffes im Messrohr bestimmt wird.core the invention is that in an arrangement of a plurality of coils, they are alternately excited so that a maximum or minimum signal voltage Uo sets, and from the ratio of these associated correlated coil currents functionally the filling level of the medium is determined in the measuring tube.
Hierzu das Ausgestaltungsbeispiel mit den genauen Verfahrensschritten, am Beispiel der Zeichnung.For this the exemplary embodiment with the exact method steps, the example of the drawing.
Das Verhältnis dieser Spulenströme ist funktional mit der Füllhöhe des Messstoffes im Messrohr verknüpft.The relationship these coil currents is functional with the filling level of the medium linked in the measuring tube.
Exemplarisches
Beispiel:
Bei vollem Rohr führt
ein Verhältnis
von Spulenstrom oben zu Spulenstrom unten
Von Io/Iu = –1 zu einer
Signalanzeige von Null während
bei einem Verhältnis
Von
Io/Iu = +1 sich die volle Signalamplitude ergibt.Exemplary example:
At full pipe, a ratio of coil current leads up to coil current below
From Io / Iu = -1 to a zero signal display while at a ratio
Io / Iu = +1 gives the full signal amplitude.
Befinden sich die Elektroden wie beim Standart- IDM genau in der Rohrmitte so lässt sich hiermit eine Füllhöhenänderung des Messstoffes bis 50% feststellen.Are located As in the standard IDM, the electrodes are located exactly in the center of the tube so lets this is a fill height change of the medium to 50%.
Durch Verlegen des Elektrodenpaares lässt sich der Wirkungsbereich beliebig weit nach unten erweitern. Dieses Messverfahren ist für beliebige Rohrgeometrien anwendbar (ovale, rechteckige u.s.w). Die Elektrodengeometrie ist hierbei beliebig und kann nach Zweckmäßigkeit gewählt werden, z.B. Linien- oder Flächenelektroden.By Laying the electrode pair can be extend the sphere of influence arbitrarily far downwards. This measuring method is for any tube geometries applicable (oval, rectangular and so on). The Electrode geometry is arbitrary and may be appropriate chosen be, e.g. Line or area electrodes.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006006154A DE102006006154A1 (en) | 2005-12-23 | 2006-02-10 | Field compensation method for use with magnetically inductive flow meters, involves alternate adjustment of maximum or minimum signal voltage during arrangement of several spools |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005062106 | 2005-12-23 | ||
DE102005062106.6 | 2005-12-23 | ||
DE102006006154A DE102006006154A1 (en) | 2005-12-23 | 2006-02-10 | Field compensation method for use with magnetically inductive flow meters, involves alternate adjustment of maximum or minimum signal voltage during arrangement of several spools |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102006006154A1 true DE102006006154A1 (en) | 2007-07-05 |
Family
ID=38135875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006006154A Ceased DE102006006154A1 (en) | 2005-12-23 | 2006-02-10 | Field compensation method for use with magnetically inductive flow meters, involves alternate adjustment of maximum or minimum signal voltage during arrangement of several spools |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102006006154A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110470353A (en) * | 2019-07-30 | 2019-11-19 | 电子科技大学 | A kind of electromagnetic flow-measurement device based on related algorithm |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4108138A1 (en) * | 1990-04-09 | 1991-10-10 | Fischer & Porter Gmbh | CIRCUIT FOR MEASURING THE CURRENT OF A LIQUID CONTAINING ELECTRICAL CHARGES |
US5369999A (en) * | 1992-03-04 | 1994-12-06 | Aichi Tokei Denki Co., Ltd. | Non-full state detecting apparatus and method |
DE4326991A1 (en) * | 1993-08-11 | 1995-02-16 | Fischer & Porter Gmbh | Device for measuring the current of a liquid flowing through a measuring tube |
DE10356009A1 (en) * | 2003-11-27 | 2005-06-30 | Krohne Meßtechnik GmbH & Co KG | Magnetically inductive volumetric flow meter operating method, involves supplying current of opposite polarities to magnetic coils so that inhomogeneous magnetic field is created between electrodes, and measuring voltage between electrodes |
-
2006
- 2006-02-10 DE DE102006006154A patent/DE102006006154A1/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4108138A1 (en) * | 1990-04-09 | 1991-10-10 | Fischer & Porter Gmbh | CIRCUIT FOR MEASURING THE CURRENT OF A LIQUID CONTAINING ELECTRICAL CHARGES |
US5369999A (en) * | 1992-03-04 | 1994-12-06 | Aichi Tokei Denki Co., Ltd. | Non-full state detecting apparatus and method |
DE4326991A1 (en) * | 1993-08-11 | 1995-02-16 | Fischer & Porter Gmbh | Device for measuring the current of a liquid flowing through a measuring tube |
DE10356009A1 (en) * | 2003-11-27 | 2005-06-30 | Krohne Meßtechnik GmbH & Co KG | Magnetically inductive volumetric flow meter operating method, involves supplying current of opposite polarities to magnetic coils so that inhomogeneous magnetic field is created between electrodes, and measuring voltage between electrodes |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110470353A (en) * | 2019-07-30 | 2019-11-19 | 电子科技大学 | A kind of electromagnetic flow-measurement device based on related algorithm |
CN110470353B (en) * | 2019-07-30 | 2021-01-26 | 电子科技大学 | Electromagnetic flow measuring device based on correlation algorithm |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8127 | New person/name/address of the applicant |
Owner name: ABB AG, 68309 MANNHEIM, DE |
|
8131 | Rejection |