JPS5750614A - Electromagnetic flowmeter - Google Patents

Electromagnetic flowmeter

Info

Publication number
JPS5750614A
JPS5750614A JP12609980A JP12609980A JPS5750614A JP S5750614 A JPS5750614 A JP S5750614A JP 12609980 A JP12609980 A JP 12609980A JP 12609980 A JP12609980 A JP 12609980A JP S5750614 A JPS5750614 A JP S5750614A
Authority
JP
Japan
Prior art keywords
signal
current
circuit
exciting
terminals
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
JP12609980A
Other languages
Japanese (ja)
Inventor
Nagaoki Kayama
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 JP12609980A priority Critical patent/JPS5750614A/en
Publication of JPS5750614A publication Critical patent/JPS5750614A/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 eliminate a zero point drift and not to be affected by a constant of an oscillation coil and also, to achieve a perfect interchange of an oscillator and converter, by forming an exciting electric current detection circuit in circuits and obtaining an output signal by dividing a signal electromotive force by its output. CONSTITUTION:An exciting electric current I having nearly a constant current is supplied from an exciting circuit 4 to a coil 1 of an oscillator through terminals 2, 3 and the same wavelength signal electromotive force (e) obtained between electrodes 5, 6 is sent out to a converter B through terminals 7, 8. This force (e) is sent to a division circuit 13 through a preamplifier. On the one hand, the signal proportionated to the current I is taken out from an exciting current detection resistance Rr forming an exciting current detection circuit 17 and is sent to a comparison signal reception circuit 16 through terminals 14, 15 and then, a comparison signal Vr is outputted from the circuit 16. Further, outputted signal is supplied to the circuit 13 and the signal from an amplifier for span set up 12 is divided. Then, the last output signal Io is taken out by a duty cycle/current converter 20. This current Io has no connection with the dimensions of the current I.
JP12609980A 1980-09-12 1980-09-12 Electromagnetic flowmeter Pending JPS5750614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12609980A JPS5750614A (en) 1980-09-12 1980-09-12 Electromagnetic flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12609980A JPS5750614A (en) 1980-09-12 1980-09-12 Electromagnetic flowmeter

Publications (1)

Publication Number Publication Date
JPS5750614A true JPS5750614A (en) 1982-03-25

Family

ID=14926580

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12609980A Pending JPS5750614A (en) 1980-09-12 1980-09-12 Electromagnetic flowmeter

Country Status (1)

Country Link
JP (1) JPS5750614A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006170968A (en) * 2004-08-12 2006-06-29 Yokogawa Electric Corp Electromagnetic flowmeter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006170968A (en) * 2004-08-12 2006-06-29 Yokogawa Electric Corp Electromagnetic flowmeter

Similar Documents

Publication Publication Date Title
ES8608172A1 (en) Metering system for measuring parameters of high ac electric energy flowing in an electric conductor.
JPS5536800A (en) Resistance neutralization system for electrochemical device
JPS52111648A (en) Constant voltage circuit
JPS5750614A (en) Electromagnetic flowmeter
JPS54143177A (en) Magnetic field detector
JPS56112662A (en) Measuring apparatus for loss of capacity element
JPS5376079A (en) Voltage detecting circuit
JPS5246429A (en) Direct current high voltage power source
JPS5788375A (en) Electronic clock
JPS5769942A (en) Detection circuit for selecting gallout signal
SU502440A1 (en) Device for detection of incomplete modes in aerial electrical networks
SU543875A1 (en) Counter / ampere hours
JPS55138662A (en) Voltage measuring method in hermetic vessel
JPS55149028A (en) Load detector
SU1193592A2 (en) Apparatus for direct current measurement
JPS5437780A (en) Electromagnetic flow meter
JPS6413826A (en) Electric field median detection circuit
JPS6428525A (en) Shape detector
JPS5495150A (en) Multiplier using hall element
JPS5576912A (en) Electromagnetic flow meter
JPS54147085A (en) Measuring apparatus for degree of vacuum
JPS5384142A (en) Remote making circuit of electric source switch
JPS57103419A (en) Notch rejecting filter
JPS5535261A (en) Wattmeter
HARRISON et al. Diode-quad bridge circuit means[Patent]