JPS646723A - Karman vortex meter - Google Patents

Karman vortex meter

Info

Publication number
JPS646723A
JPS646723A JP62161591A JP16159187A JPS646723A JP S646723 A JPS646723 A JP S646723A JP 62161591 A JP62161591 A JP 62161591A JP 16159187 A JP16159187 A JP 16159187A JP S646723 A JPS646723 A JP S646723A
Authority
JP
Japan
Prior art keywords
signal
circuit
voltage
switch
vortex
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
JP62161591A
Other languages
Japanese (ja)
Other versions
JPH07111362B2 (en
Inventor
Ichizo Ito
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 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 Yokogawa Electric Corp filed Critical Yokogawa Electric Corp
Priority to JP62161591A priority Critical patent/JPH07111362B2/en
Publication of JPS646723A publication Critical patent/JPS646723A/en
Publication of JPH07111362B2 publication Critical patent/JPH07111362B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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)

Abstract

PURPOSE:To achieve a higher vibration-proof characteristic, by providing a judgement function to determine whether an output signal is a vortex signal or not by amplitude of a frequency. CONSTITUTION:A vortex signal from a stress detection sensor 1 is converted with a charge converter 11 into a voltage signal E11. One of resulting signals is applied to a Schmitt trigger circuit as input E13 via a filter circuit 12 and a first amplification circuit 13. When an input frequency of a circuit 14 is larger than a trigger level set, it is outputted as pulse signal P14. The other thus converted is turned with a rectification circuit 22 to a DC voltage signal E22 through a second amplification circuit 21. This signal E22 is compared with an output voltage E23 of an F/V converter 23 into which the signal P14 is input ted by a comparator 24. When the signal E22 is larger than the voltage E23, an output of the comparator 24 turns ON a switch of a gate circuit 15. When the switch of the circuit 15 is ON, the signal P14 is outputted as vortex fre quency signal while the signal P14 is cut off as noise when the switch thereof 15 is OFF.
JP62161591A 1987-06-29 1987-06-29 Karman vortex flowmeter Expired - Lifetime JPH07111362B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62161591A JPH07111362B2 (en) 1987-06-29 1987-06-29 Karman vortex flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62161591A JPH07111362B2 (en) 1987-06-29 1987-06-29 Karman vortex flowmeter

Publications (2)

Publication Number Publication Date
JPS646723A true JPS646723A (en) 1989-01-11
JPH07111362B2 JPH07111362B2 (en) 1995-11-29

Family

ID=15738046

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62161591A Expired - Lifetime JPH07111362B2 (en) 1987-06-29 1987-06-29 Karman vortex flowmeter

Country Status (1)

Country Link
JP (1) JPH07111362B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419189A (en) * 1993-08-30 1995-05-30 Lew; Hyok S. Method for obtaining zero flowmeter reading for zero flow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5419189A (en) * 1993-08-30 1995-05-30 Lew; Hyok S. Method for obtaining zero flowmeter reading for zero flow

Also Published As

Publication number Publication date
JPH07111362B2 (en) 1995-11-29

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