DE1227677B - Inductive flow meter for asymmetrical flows - Google Patents
Inductive flow meter for asymmetrical flowsInfo
- Publication number
- DE1227677B DE1227677B DEE27261A DEE0027261A DE1227677B DE 1227677 B DE1227677 B DE 1227677B DE E27261 A DEE27261 A DE E27261A DE E0027261 A DEE0027261 A DE E0027261A DE 1227677 B DE1227677 B DE 1227677B
- Authority
- DE
- Germany
- Prior art keywords
- field
- electrodes
- straight line
- pair
- angle
- 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.)
- Pending
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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Description
Induktiver Durchflußmesser für asymmetrische Strömungen Die Erfindung betrifft eine Vorrichtung zum Messen der Strömungsgeschwindigkeit von Flüssigkeiten in Leitungen durch Messung der elektromotorischen Kraft, die durch die Bewegung der Flüssigkeit in einem senkrecht zur Strömungsrichtung herrschenden magnetischen Wechselfeld erzeugt wird.Inductive flow meter for asymmetrical flows The invention relates to a device for measuring the flow rate of liquids in lines by measuring the electromotive force exerted by the movement of the liquid in a magnetic direction perpendicular to the direction of flow Alternating field is generated.
Es ist bekannt, daß beim induktiven Durchflußmesser die Anzeige unabhängig vom Strömungsprofil ist, also unabhängig davon, ob laminare oder turbulente Strömung vorliegt. Dies gilt allerdings nur für rotationssymmetrische Geschwindigkeitsverteilung des strömenden Mediums. It is known that the inductive flow meter displays independently on the flow profile, i.e. regardless of whether the flow is laminar or turbulent is present. However, this only applies to rotationally symmetrical speed distribution of the flowing medium.
In vielen Fällen ist diese Bedingung aber nicht hinreichend erfüllt. So ist z. B. das Strömungsprofil nach einer Umlenkung (Krümmer) der Rohrströmung stark unsymmetrisch. Der Bereich der größten Geschwindigkeit liegt nahe an einer Seite der Rohrwand. In many cases, however, this condition is not sufficiently fulfilled. So is z. B. the flow profile after a deflection (bend) of the pipe flow strongly asymmetrical. The area of greatest speed is close to one Side of the pipe wall.
Es zeigt sich, daß die Anzeige des Meßgerätes sich mit einer auftretenden Asymmetrie des Strömungsprofils ändert. Die Anderung hängt ab vom Grade der Asymmetrie und von der Lage des Bereiches der maximalen Geschwindigkeit. Nähert sich dieser Bereich einer Elektrode, so erhöht sich die Meßspannung bei konstantem Durchfluß. Verschiebt sich dagegen das Maximum des Geschwindigkeitsprofils in die Nähe des Pols des magnetischen Wechselfeldes, so verringert sich die Meßspannung. It turns out that the display of the measuring device is occurring with an Asymmetry of the flow profile changes. The change depends on the degree of asymmetry and the location of the area of maximum speed. Approaching this Area of an electrode, the measuring voltage increases with constant flow. If, on the other hand, the maximum of the velocity profile shifts in the vicinity of the Pole of the alternating magnetic field, the measuring voltage is reduced.
Experimentelle Untersuchungen haben ergeben, daß eine Anordnung von Elektroden und Polpaaren, bei den die Verbindungsgeraden der Pole sich unter 500 schneiden, am wenigsten empfindlich ist auf eine asymmetrische Verteilung der Strömung. Experimental studies have shown that an arrangement of Electrodes and pole pairs where the straight line connecting the poles is less than 500 cut, is least sensitive to an asymmetrical distribution of the flow.
Die Aufgabe der Erfindung, einen induktiven Durchflußmesser zu schaffen, dessen Anzeige nahezu unabhängig ist von der Lage des maximalen Bereiches der Geschwindigkeit, wird dadurch gelöst, daß sich das Wechselfeld und die durch ein Elektrodenpaar bestimmte Gerade unter einem Winkel von vorzugsweise 500 schneiden. The object of the invention to create an inductive flow meter, whose display is almost independent of the position of the maximum speed range, is achieved in that the alternating field and that determined by a pair of electrodes Cut straight at an angle of preferably 500.
Sind bei einem Induktiven Durchflußmesser zwei Elektrodenpaare vorgesehen, so genügt es, wenn die Verbindungsgerade der Pole zu einem Elektrodenpaar eine Winkellage von 500 einnimmt. If two pairs of electrodes are provided for an inductive flow meter, it is sufficient if the straight line connecting the poles to a pair of electrodes has an angular position of 500 occupies.
In Abwandlung des Erfindungsgedankens ist vorgesehen, daß die Winkellage der Verbindungsgerade der Pole sich periodisch ändert und im Mittel um eine Lage von 500 oszilliert. In a modification of the inventive concept it is provided that the angular position the straight line connecting the poles changes periodically and on average by one position oscillated from 500.
Eine weitere Variation der erfindungsgemäßen Anordnung liegt darin, daß das Feld um die Rohrachse rotiert, wobei die Meßwerte nur dann abgegriffen werden, wenn die Verbindungsgeraden eine Lage von ungefähr 500 durchlaufen. Another variation of the arrangement according to the invention is that that the field rotates around the pipe axis, the measured values only then being tapped will, when the connecting straight lines pass through a position of about 500.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE27261A DE1227677B (en) | 1964-06-20 | 1964-06-20 | Inductive flow meter for asymmetrical flows |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEE27261A DE1227677B (en) | 1964-06-20 | 1964-06-20 | Inductive flow meter for asymmetrical flows |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1227677B true DE1227677B (en) | 1966-10-27 |
Family
ID=7072614
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEE27261A Pending DE1227677B (en) | 1964-06-20 | 1964-06-20 | Inductive flow meter for asymmetrical flows |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1227677B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019192799A1 (en) * | 2018-04-06 | 2019-10-10 | Endress+Hauser Flowtec Ag | Magnetic-inductive flowmeter and measuring point having a magnetic-inductive flowmeter of this type |
-
1964
- 1964-06-20 DE DEE27261A patent/DE1227677B/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019192799A1 (en) * | 2018-04-06 | 2019-10-10 | Endress+Hauser Flowtec Ag | Magnetic-inductive flowmeter and measuring point having a magnetic-inductive flowmeter of this type |
CN111919092A (en) * | 2018-04-06 | 2020-11-10 | 恩德斯+豪斯流量技术股份有限公司 | Magnetic-inductive flow meter and measuring point with a magnetic-inductive flow meter of this type |
EP4056959A1 (en) * | 2018-04-06 | 2022-09-14 | Endress + Hauser Flowtec AG | Magnetic-inductive flow meter and measuring point using the same |
US11629982B2 (en) | 2018-04-06 | 2023-04-18 | Endress+Hauser Flowtec Ag | Magnetic-inductive flowmeter and measuring point having a magnetic-inductive flowmeter of this type |
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