FR2350585A1 - Inductive flow meter evaluation circuit - has two scanner stores detecting peak and trough voltages generated by flow through alternating magnetic field - Google Patents

Inductive flow meter evaluation circuit - has two scanner stores detecting peak and trough voltages generated by flow through alternating magnetic field

Info

Publication number
FR2350585A1
FR2350585A1 FR7713675A FR7713675A FR2350585A1 FR 2350585 A1 FR2350585 A1 FR 2350585A1 FR 7713675 A FR7713675 A FR 7713675A FR 7713675 A FR7713675 A FR 7713675A FR 2350585 A1 FR2350585 A1 FR 2350585A1
Authority
FR
France
Prior art keywords
evaluation circuit
store
magnetic field
alternating magnetic
flow
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
Application number
FR7713675A
Other languages
French (fr)
Other versions
FR2350585B1 (en
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.)
HAMMELRATH TURBO WERK FRITZ
Original Assignee
HAMMELRATH TURBO WERK FRITZ
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 HAMMELRATH TURBO WERK FRITZ filed Critical HAMMELRATH TURBO WERK FRITZ
Publication of FR2350585A1 publication Critical patent/FR2350585A1/en
Application granted granted Critical
Publication of FR2350585B1 publication Critical patent/FR2350585B1/fr
Granted legal-status Critical Current

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)
  • Measuring Volume Flow (AREA)

Abstract

The inductive flow meter has one electromagnet producing an alternating magnetic field in the flow region. The meter in conjunction with an electrode pair connected to an evaluation circuit is designed to use a simple circuit and operate free of stray signal influences, thus achieving relatively high accuracy. In partic., either direct voltage drift in the amplifier or the polarisation voltage is compensated. A first voltage scanner store (20) in the evaluation circuit (14) is controlled so as to detect and store the peak value in each electrode voltage period. A second store (21) retains the trough value. Both store outputs are input to a differential amplifier (26), whose output is fed to a meter via an averaging circuit (27).
FR7713675A 1976-05-06 1977-05-05 Inductive flow meter evaluation circuit - has two scanner stores detecting peak and trough voltages generated by flow through alternating magnetic field Granted FR2350585A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19762619971 DE2619971C3 (en) 1976-05-06 1976-05-06 Inductive flow meter

Publications (2)

Publication Number Publication Date
FR2350585A1 true FR2350585A1 (en) 1977-12-02
FR2350585B1 FR2350585B1 (en) 1982-10-15

Family

ID=5977179

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7713675A Granted FR2350585A1 (en) 1976-05-06 1977-05-05 Inductive flow meter evaluation circuit - has two scanner stores detecting peak and trough voltages generated by flow through alternating magnetic field

Country Status (3)

Country Link
DE (1) DE2619971C3 (en)
FR (1) FR2350585A1 (en)
NL (1) NL7704971A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2856240C3 (en) * 1978-12-27 1981-12-24 Fa. Ludwig Krohne, 4100 Duisburg Process for inductive flow measurement of liquids in partially filled pipelines or open channels as well as flow meters for carrying out the process
US4350050A (en) * 1981-02-10 1982-09-21 Deere & Company Flow transducer
DE3126965A1 (en) * 1981-07-08 1983-01-27 Fischer & Porter GmbH, 3400 Göttingen Device for measuring the current in a medium flowing through a pipe
DE3540170A1 (en) * 1985-11-13 1987-05-21 Turbo Werk Messtechnik Gmbh CIRCUIT FOR CONVERTING A PERIODIC USE SIGNAL TO A DC VOLTAGE SIGNAL
DE19917268B4 (en) * 1999-04-16 2005-07-14 Siemens Flow Instruments A/S Method for checking an electromagnetic flowmeter and electromagnetic flowmeter arrangement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3550446A (en) * 1969-02-28 1970-12-29 Nat Res Dev Electromagnetic flowmeters
FR2106449A1 (en) * 1970-09-11 1972-05-05 Bailey Meter Co

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3316762A (en) * 1963-08-28 1967-05-02 Statham Instrument Inc Apparatus and process for measuring fluid flow
DE2052175C3 (en) * 1970-10-23 1978-12-21 Karl Walter Prof. Dr.- Ing. 5910 Kreuztal Bonfig Process for the compensation of the electrochemical disturbance direct voltage in the inductive flow measurement with direct field or switched direct field
DE2151381A1 (en) * 1971-10-15 1973-04-19 Fischer & Porter Gmbh AMPLIFIER ARRANGEMENT FOR AN INDUCTIVE FLOW MEASURING DEVICE
DE2410407C3 (en) * 1974-03-05 1981-05-21 Fa. Ludwig Krohne, 4100 Duisburg Method for the compensation of the electrochemical disturbance DC voltage in the inductive flow measurement with a DC field periodically switched back and forth between two induction values
DE2547392C3 (en) 1975-10-23 1981-05-27 Fischer & Porter GmbH, 3400 Göttingen Inductive flow meter with an excitation winding that generates a magnetic field and is excited by a sinusoidal alternating voltage

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3550446A (en) * 1969-02-28 1970-12-29 Nat Res Dev Electromagnetic flowmeters
FR2106449A1 (en) * 1970-09-11 1972-05-05 Bailey Meter Co

Also Published As

Publication number Publication date
DE2619971B2 (en) 1980-12-04
NL7704971A (en) 1977-11-08
DE2619971A1 (en) 1977-11-10
FR2350585B1 (en) 1982-10-15
DE2619971C3 (en) 1983-03-17

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