JPS56120917A - Vortex flowmeter - Google Patents

Vortex flowmeter

Info

Publication number
JPS56120917A
JPS56120917A JP2460180A JP2460180A JPS56120917A JP S56120917 A JPS56120917 A JP S56120917A JP 2460180 A JP2460180 A JP 2460180A JP 2460180 A JP2460180 A JP 2460180A JP S56120917 A JPS56120917 A JP S56120917A
Authority
JP
Japan
Prior art keywords
frequency
vortex
resonant unit
cylindrical
resonant
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
JP2460180A
Other languages
Japanese (ja)
Other versions
JPS605883B2 (en
Inventor
Kinji Harada
Yoshio Kurita
Kyoichi Ikeda
Motoyoshi Ando
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
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works Ltd
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 Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP55024601A priority Critical patent/JPS605883B2/en
Publication of JPS56120917A publication Critical patent/JPS56120917A/en
Publication of JPS605883B2 publication Critical patent/JPS605883B2/en
Expired 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
    • G01F1/05—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 mechanical effects
    • G01F1/20—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 mechanical effects by detection of dynamic effects of the flow
    • G01F1/32—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 mechanical effects by detection of dynamic effects of the flow using swirl flowmeters
    • G01F1/325—Means for detecting quantities used as proxy variables for swirl
    • G01F1/3287—Means for detecting quantities used as proxy variables for swirl circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

PURPOSE:To enable measurement of flow speed and flow rate without being influenced by various vibration noises by a method wherein a pressure corresponding to a Karman's vortex is made to act on a cylindrical resonant unit in the state that it is self-excited with its natural frequency and thereby the resonant frequency is modulated. CONSTITUTION:The cylindrical resonant unit 2 makes self-excited oscillation with resonant frequency omegaD under the condition that no current exists in fluid to be measured in a pipe line 1, and when the current starts to appear, the Karman's vortex is generated with frequency omegaF corresponding to the flow speed at both side surfaces of the cylindrical resonant unit 2 facing the direction of current. By the generation of the vortex, differential pressure is generated alternately at both side surfaces of the cylindrical resonant unit 2 and thereby the resonant frequency omegaD is modulated. Accordingly, by outputting the vortex frequency omegaF obtained from a phase demodulating circuit DM through scaling by a scaler 3C and by performing operation by an operation circuit CP, mass flow rate Q can be found.
JP55024601A 1980-02-28 1980-02-28 vortex flow meter Expired JPS605883B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55024601A JPS605883B2 (en) 1980-02-28 1980-02-28 vortex flow meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55024601A JPS605883B2 (en) 1980-02-28 1980-02-28 vortex flow meter

Publications (2)

Publication Number Publication Date
JPS56120917A true JPS56120917A (en) 1981-09-22
JPS605883B2 JPS605883B2 (en) 1985-02-14

Family

ID=12142662

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55024601A Expired JPS605883B2 (en) 1980-02-28 1980-02-28 vortex flow meter

Country Status (1)

Country Link
JP (1) JPS605883B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4809558A (en) * 1987-02-27 1989-03-07 Itt Corporation Method and apparatus for use with vortex flowmeters
JPH03238321A (en) * 1990-02-15 1991-10-24 Fuji Electric Co Ltd Karman vortex flowmeter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6723295B2 (en) 2018-07-05 2020-07-15 本田技研工業株式会社 Straddle-type vehicle operation part structure and saddle-ride type vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4809558A (en) * 1987-02-27 1989-03-07 Itt Corporation Method and apparatus for use with vortex flowmeters
JPH03238321A (en) * 1990-02-15 1991-10-24 Fuji Electric Co Ltd Karman vortex flowmeter

Also Published As

Publication number Publication date
JPS605883B2 (en) 1985-02-14

Similar Documents

Publication Publication Date Title
CA2113800A1 (en) Coriolis Effect Mass Flow Meter
WO1995016897A3 (en) Single path radial mode coriolis mass flow rate meter
CA2171374A1 (en) Coriolis mass flowmeter
KR830010374A (en) Flow detector
US3864972A (en) Signal recovery system for vortex type flowmeter
JPS56120917A (en) Vortex flowmeter
EP0828142A3 (en) Smart flowmeter pre-amplifier
JPS57147063A (en) Ultrasonic doppler flow meter
AU5200399A (en) Device for measuring the volume flow of a fluid in a pipe
JPS5697830A (en) Karman vortex flow meter
US4424714A (en) Vortex generating device
JPS54107362A (en) Karman vortex current meter
GB2017914A (en) Improvements in or relating to ultrasonic flowmeters
SU1140047A1 (en) Tachometer meter of air motion speed
KR910005035A (en) Eddy flowmeter
JPS5717864A (en) Flow speed meter
JPS53149360A (en) Flow velocity and flow rate measuring apparatus
JP3036800B2 (en) Vortex flow meter
JPS53148470A (en) Flow velocity and flow rate measuring device
FRITZ Sidetone generator flowmeter[Patent Application]
Ramaprian et al. Experiments on transitional oscillatory pipe flow
RU2029241C1 (en) Vortex flow meter
JPS5389764A (en) Eddy current flow meter
JPS57108626A (en) Separate excitation type correlation flowmeter
JPS5232363A (en) Oscillation element for measurement of flow rates