JPS57149919A - Electromagnetic flow meter - Google Patents

Electromagnetic flow meter

Info

Publication number
JPS57149919A
JPS57149919A JP3525381A JP3525381A JPS57149919A JP S57149919 A JPS57149919 A JP S57149919A JP 3525381 A JP3525381 A JP 3525381A JP 3525381 A JP3525381 A JP 3525381A JP S57149919 A JPS57149919 A JP S57149919A
Authority
JP
Japan
Prior art keywords
fluid
noise voltage
energizing
signal
electrode
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
Application number
JP3525381A
Other languages
Japanese (ja)
Inventor
Ichiu Suzuki
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric Corp
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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP3525381A priority Critical patent/JPS57149919A/en
Publication of JPS57149919A publication Critical patent/JPS57149919A/en
Pending 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

PURPOSE:To improve output response with simple constitution by eliminating an electromagnetically induced noise voltage, an electrochemical DC noise voltage, and a commercial frequency noise voltage by energizing an electrode provided in a fluid to be measured by an alternating signal, and operating the electromotive force of the electrode. CONSTITUTION:Electrodes 3a and 3b cross the direction of a fluid to be measured, and an energizing coil 1 is at right angles to said fluid and each electrode fitting direction. Switches SW1-a, SW1-b, and SW2-a, and SW2-b change the polarities of feeding from a DC constant current source 16 to obtain a low frequency reactangular-wave energizing current. Each SW is controlled by a timing signal 17 from a signal processing circuit 18. The electromotive forces of the electrodes 3a and 3b are supplied through amplifiers 4 and 5 to the circuit 18, processed by A/D conversion 8 at timing from a CPU9, and stored in a memory 10; and the CPU9 performs arithmetic operation, and the arithmetic result is stored in the memory 10 and then processed by D/A conversion 12 to be outputted 15. Thus, a signal proportional to a flow rate is obtained.
JP3525381A 1981-03-13 1981-03-13 Electromagnetic flow meter Pending JPS57149919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3525381A JPS57149919A (en) 1981-03-13 1981-03-13 Electromagnetic flow meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3525381A JPS57149919A (en) 1981-03-13 1981-03-13 Electromagnetic flow meter

Publications (1)

Publication Number Publication Date
JPS57149919A true JPS57149919A (en) 1982-09-16

Family

ID=12436652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3525381A Pending JPS57149919A (en) 1981-03-13 1981-03-13 Electromagnetic flow meter

Country Status (1)

Country Link
JP (1) JPS57149919A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5815121A (en) * 1981-07-21 1983-01-28 Yokogawa Hokushin Electric Corp Electromagnetic flowmeter
JPS58115324A (en) * 1981-12-29 1983-07-09 Yokogawa Hokushin Electric Corp Electromagnetic flowmeter
JPS60159825A (en) * 1984-01-31 1985-08-21 Sharp Corp Manufacture of liquid crystal display element
JP2016206053A (en) * 2015-04-24 2016-12-08 横河電機株式会社 Field apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5375966A (en) * 1976-12-15 1978-07-05 Hokushin Electric Works Electromagnetic flow meter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5375966A (en) * 1976-12-15 1978-07-05 Hokushin Electric Works Electromagnetic flow meter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5815121A (en) * 1981-07-21 1983-01-28 Yokogawa Hokushin Electric Corp Electromagnetic flowmeter
JPS58115324A (en) * 1981-12-29 1983-07-09 Yokogawa Hokushin Electric Corp Electromagnetic flowmeter
JPH0153403B2 (en) * 1981-12-29 1989-11-14 Yokogawa Electric Corp
JPS60159825A (en) * 1984-01-31 1985-08-21 Sharp Corp Manufacture of liquid crystal display element
JPH0333249B2 (en) * 1984-01-31 1991-05-16 Sharp Kk
JP2016206053A (en) * 2015-04-24 2016-12-08 横河電機株式会社 Field apparatus

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