GB2014740A - Electromagnetic flowmeters - Google Patents
Electromagnetic flowmetersInfo
- Publication number
- GB2014740A GB2014740A GB7905969A GB7905969A GB2014740A GB 2014740 A GB2014740 A GB 2014740A GB 7905969 A GB7905969 A GB 7905969A GB 7905969 A GB7905969 A GB 7905969A GB 2014740 A GB2014740 A GB 2014740A
- Authority
- GB
- United Kingdom
- Prior art keywords
- axis
- tube member
- descends
- fluid
- plane
- 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
- 239000012530 fluid Substances 0.000 abstract 2
- 230000001419 dependent effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
An apparatus for measuring the volume of a liquid per unit time flowing through a tube comprises a tube member of diameter D, the axis of which is considered to lie along a z- axis of a right-handed coordinate system. The tube member is insulated at least in the interior thereof and a pair of electrodes E1, E2 is arranged diametrically (defining the x-axis) and connected to a voltmeter. A magnetic field substantially perpendicular to the x-z plane is provided whereby variations in the flow rate of fluid through the tube member cause corresponding variations in the measured voltage. The magnetic field is selected, e.g. by using two pairs of pole shoes or coils on respective sides of the electrode (x, y) plane, such that the y- component of the field descends from a saddle point (xs, ys, zs) in both directions parallel to the x-axis and rises in both directions parallel to the z-axis and descends after exceeding a maximum, where ¦xs¦<0.1 D, ¦ys¦<0.45D, and ¦zs¦<0.1D. The resulting measurement is thereby less dependent on the rotational flow state of the fluid. <IMAGE>
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19782807356 DE2807356A1 (en) | 1978-02-21 | 1978-02-21 | DEVICE FOR MEASURING A VOLUME OF LIQUID FLOWING THROUGH A PIPE PER UNIT OF TIME |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2014740A true GB2014740A (en) | 1979-08-30 |
| GB2014740B GB2014740B (en) | 1982-05-19 |
Family
ID=6032533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7905969A Expired GB2014740B (en) | 1978-02-21 | 1979-02-20 | Electromagnetic flowmeters |
Country Status (9)
| Country | Link |
|---|---|
| BE (1) | BE874265A (en) |
| CH (1) | CH637472A5 (en) |
| DE (1) | DE2807356A1 (en) |
| FI (1) | FI790443A (en) |
| FR (1) | FR2417755A1 (en) |
| GB (1) | GB2014740B (en) |
| IT (2) | IT1123983B (en) |
| NL (1) | NL7901378A (en) |
| SE (1) | SE7901485L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3013035A1 (en) | 1979-04-05 | 1980-10-23 | Nat Res Dev | METHOD FOR ELECTROMAGNETIC FLOW MEASUREMENT AND WORKING FLOW MEASURING DEVICE |
| EP3211384B1 (en) * | 2016-02-26 | 2021-08-18 | Krohne Messtechnik GmbH | Magnetic-inductive flow meter and associated method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB802017A (en) * | 1955-10-10 | 1958-09-24 | British Thomson Houston Co Ltd | Improvements in and relating to liquid flow-meters |
| DE1473073A1 (en) * | 1963-10-15 | 1969-11-27 | Fischer & Porter Gmbh | Flow measuring arrangement working according to the induction method |
| DE2103895A1 (en) * | 1971-01-28 | 1972-09-14 | Krohne Fa Ludwig | Inductive flow meter |
-
1978
- 1978-02-21 DE DE19782807356 patent/DE2807356A1/en not_active Withdrawn
-
1979
- 1979-02-01 CH CH98779A patent/CH637472A5/en not_active IP Right Cessation
- 1979-02-09 FI FI790443A patent/FI790443A/en unknown
- 1979-02-09 IT IT12460/79A patent/IT1123983B/en active
- 1979-02-09 IT IT7915118U patent/IT7915118V0/en unknown
- 1979-02-15 FR FR7903872A patent/FR2417755A1/en active Granted
- 1979-02-19 BE BE193540A patent/BE874265A/en not_active IP Right Cessation
- 1979-02-20 GB GB7905969A patent/GB2014740B/en not_active Expired
- 1979-02-20 SE SE7901485A patent/SE7901485L/en not_active Application Discontinuation
- 1979-02-21 NL NL7901378A patent/NL7901378A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| BE874265A (en) | 1979-06-18 |
| IT1123983B (en) | 1986-05-07 |
| FI790443A (en) | 1979-08-22 |
| FR2417755A1 (en) | 1979-09-14 |
| DE2807356A1 (en) | 1979-08-23 |
| IT7915118V0 (en) | 1979-02-09 |
| IT7912460A0 (en) | 1979-02-09 |
| NL7901378A (en) | 1979-08-23 |
| SE7901485L (en) | 1979-08-22 |
| FR2417755B1 (en) | 1983-06-17 |
| GB2014740B (en) | 1982-05-19 |
| CH637472A5 (en) | 1983-07-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |