GB1105572A - An electromagnetic flow-meter - Google Patents
An electromagnetic flow-meterInfo
- Publication number
- GB1105572A GB1105572A GB2110065A GB2110065A GB1105572A GB 1105572 A GB1105572 A GB 1105572A GB 2110065 A GB2110065 A GB 2110065A GB 2110065 A GB2110065 A GB 2110065A GB 1105572 A GB1105572 A GB 1105572A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amplifier
- electrodes
- cable
- signal
- feedback
- 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
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
- G01F1/60—Circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
1,105,572. Induction flowmeters. COMPAGNIE GENERALE d'ELECTRONIQUE INDUSTRIELLE LEPAUTE. May 18, 1965, No. 21100/65. Heading G1N. In an electromagnetic flowmeter, a tube 16 carrying the liquid to be measured has a magnetic field applied across it by coils 5a, 5b, and pick-up electrodes 7a, 7b, are connected via a two-core screened cable, B, to a transistorized, differential, feedback amplifier, A, a feedback loop of which contains the capacity of the cable. The arrangement maintains a high input impedance to the amplifier, the outputs from electrodes 7a, 7b being fed to cable conductors 1 and 2 and thence to the amplifier inputs 24, 25, while the screens 1a, 2a of the respective cable conductors are connected to feedback lines 27, 26 of the amplifier. An overall cable screen 3 is connected to a third, reference, electrode, 18, on the tube 16, and to the amplifier earth line. A signal proportional to the applied magnetic field is derived by a circuit, D, from the A. C. source 17 which supplies the coils 5a, 5b, and this signal appears at 14 where it is compared with the output signal, at 13, of the amplifier in a comparison means (not shown); this eliminates the effect of field variations upon the flow measurement signal. Correction is also applied to the output of the electrodes 7a, 7b, by a circuit consisting of resistors 6a, 6b and a coil 4 mounted inside the flowmeter casing 8 with an associated moving core 21, this circuit serving to compensate for noise signals introduced, by the field, in the connecting leads to the electrodes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2110065A GB1105572A (en) | 1965-05-18 | 1965-05-18 | An electromagnetic flow-meter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2110065A GB1105572A (en) | 1965-05-18 | 1965-05-18 | An electromagnetic flow-meter |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1105572A true GB1105572A (en) | 1968-03-06 |
Family
ID=10157230
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2110065A Expired GB1105572A (en) | 1965-05-18 | 1965-05-18 | An electromagnetic flow-meter |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1105572A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2324606A (en) * | 1997-04-25 | 1998-10-28 | Kent Meters Ltd | Electromagnetic flowmeters |
EP1030168A1 (en) * | 1999-02-15 | 2000-08-23 | Krohne Messtechnik Gmbh & Co. Kg | Signal processing circuit for a differential voltage, in particular for a magnetic inductive flowmeter |
-
1965
- 1965-05-18 GB GB2110065A patent/GB1105572A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2324606A (en) * | 1997-04-25 | 1998-10-28 | Kent Meters Ltd | Electromagnetic flowmeters |
GB2324606B (en) * | 1997-04-25 | 2002-01-16 | Kent Meters Ltd | Electromagnetic flowmeter |
EP1030168A1 (en) * | 1999-02-15 | 2000-08-23 | Krohne Messtechnik Gmbh & Co. Kg | Signal processing circuit for a differential voltage, in particular for a magnetic inductive flowmeter |
US6693486B1 (en) | 1999-02-15 | 2004-02-17 | Krohne Messtechnik Gmbh & Co. | Signal-processing circuit for a differential voltage, especially for a magnetoinductive flowmeter |
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