GB1385849A - Electromagnetic flowmeter - Google Patents

Electromagnetic flowmeter

Info

Publication number
GB1385849A
GB1385849A GB3584673A GB3584673A GB1385849A GB 1385849 A GB1385849 A GB 1385849A GB 3584673 A GB3584673 A GB 3584673A GB 3584673 A GB3584673 A GB 3584673A GB 1385849 A GB1385849 A GB 1385849A
Authority
GB
United Kingdom
Prior art keywords
signals
main
auxiliary electrodes
field
electrodes
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
Application number
GB3584673A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SP K BYURO MAGNIT GIDRODINAM
Original Assignee
SP K BYURO MAGNIT GIDRODINAM
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SP K BYURO MAGNIT GIDRODINAM filed Critical SP K BYURO MAGNIT GIDRODINAM
Priority to GB3584673A priority Critical patent/GB1385849A/en
Publication of GB1385849A publication Critical patent/GB1385849A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/08—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect
    • 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)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1385849 M H D Flowmeters SPETSIALNOE KONSTRUKTORSKOE BJURO MAGNITNOI GIDRODINAMIKI INSTITUTA FIZIKI AKADEMII NAUK LATVIISKOI SSR 27 July 1973 35846/73 Heading G1N In an M.H.D. flowmeter, auxiliary electrodes are provided beside the main electrodes to detect eddy-current signals (distinguishable by 90 degrees phase shift) and the two signals are compared to determine the flow-rate whereby the measurement is less critically dependent on the magnetic system. As shown with a simple transverse A. C. magnetic field signals from main and two pairs of auxiliary electrodes 3, 4 are passed through amplifiers 7, 8 to phase discriminators 9, 10 feeding a comparator 11. In this example signals from two sets of auxiliary electrodes 4 are summed at 6. The Specification shows schematically that if the magnetic field is spaced along the pipe-line with the magnitude and field sense having a sinusoidal distribution (i.e. zero nett field), the auxiliary contacts should be spaced #/4 of the spatial wavelength from the main contacts Figs. 5, 6 (not shown), and may all be on one side of the pipe as in Fig. 7 (not shown).
GB3584673A 1973-07-27 1973-07-27 Electromagnetic flowmeter Expired GB1385849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3584673A GB1385849A (en) 1973-07-27 1973-07-27 Electromagnetic flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3584673A GB1385849A (en) 1973-07-27 1973-07-27 Electromagnetic flowmeter

Publications (1)

Publication Number Publication Date
GB1385849A true GB1385849A (en) 1975-03-05

Family

ID=10382160

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3584673A Expired GB1385849A (en) 1973-07-27 1973-07-27 Electromagnetic flowmeter

Country Status (1)

Country Link
GB (1) GB1385849A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236394A (en) * 1989-09-26 1991-04-03 Foxboro Co Electromagnetic flowmeters
DE102013114427A1 (en) * 2013-12-19 2015-06-25 Endress + Hauser Flowtec Ag Arrangement and method for determining a flow-related measured variable

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236394A (en) * 1989-09-26 1991-04-03 Foxboro Co Electromagnetic flowmeters
GB2236394B (en) * 1989-09-26 1994-08-24 Foxboro Co Improvements in and relating to electromagnetic flowmeters
US5398553A (en) * 1989-09-26 1995-03-21 The Foxboro Company Electromagnetic flowmeter
US5503027A (en) * 1989-09-26 1996-04-02 The Foxboro Company Electromagnetic flowmeters
DE102013114427A1 (en) * 2013-12-19 2015-06-25 Endress + Hauser Flowtec Ag Arrangement and method for determining a flow-related measured variable

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee