JPS57119219A - Karman's vortex flowmeter - Google Patents

Karman's vortex flowmeter

Info

Publication number
JPS57119219A
JPS57119219A JP56005585A JP558581A JPS57119219A JP S57119219 A JPS57119219 A JP S57119219A JP 56005585 A JP56005585 A JP 56005585A JP 558581 A JP558581 A JP 558581A JP S57119219 A JPS57119219 A JP S57119219A
Authority
JP
Japan
Prior art keywords
karman
vortex
fluid
reduction
frequency
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
JP56005585A
Other languages
Japanese (ja)
Inventor
Takeo Yokota
Shigenori Hokari
Hisatoku Shioiri
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.)
Nagano Keiki Seisakusho KK
Original Assignee
Nagano Keiki Seisakusho KK
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 Nagano Keiki Seisakusho KK filed Critical Nagano Keiki Seisakusho KK
Priority to JP56005585A priority Critical patent/JPS57119219A/en
Publication of JPS57119219A publication Critical patent/JPS57119219A/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
    • G01F1/05—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
    • G01F1/3259—Means for detecting quantities used as proxy variables for swirl for detecting fluid pressure oscillations
    • G01F1/3266—Means for detecting quantities used as proxy variables for swirl for detecting fluid pressure oscillations by sensing mechanical vibrations

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To ensure a high sensitivity and a longer life of a Karman's vortex generator body with a simple construction by arranging it vertical to the flow of a fluid being measured to be connected to a magnet strictive element. CONSTITUTION:When a fluid 12 to be measured flows vertically, a Karman's vortex is generated with a Karman's vortex generator body 14, which receives an alternate load in the direction of the arrow 34 and 36 due to a pressure difference by th Karman's vortex. This load applys a stress of reduction and tension alternately on magnetostrictive elements 20a and 20b. When the elements 20a and 20b undergo the reduction and tension stress, a villari effect varies the magnetization curve thereof. The detection of the frequency of the variations per unit time clarifies the frequency of the Karman's vortex. The variations of the magnetization curve can be detected in terms of the changes in the magnetic permeability. The impedance of coils 22a and 22b varies inversely and unbalanced current flows throug an ammeter 38. The polarity of the current is discriminated with a built-in diode 40 thereby highly facilitating electric treatment in the subsequent stage.
JP56005585A 1981-01-16 1981-01-16 Karman's vortex flowmeter Pending JPS57119219A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56005585A JPS57119219A (en) 1981-01-16 1981-01-16 Karman's vortex flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56005585A JPS57119219A (en) 1981-01-16 1981-01-16 Karman's vortex flowmeter

Publications (1)

Publication Number Publication Date
JPS57119219A true JPS57119219A (en) 1982-07-24

Family

ID=11615310

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56005585A Pending JPS57119219A (en) 1981-01-16 1981-01-16 Karman's vortex flowmeter

Country Status (1)

Country Link
JP (1) JPS57119219A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013117532A (en) * 2011-12-02 2013-06-13 Krohne Messtechnik Gmbh Vortex flow-meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013117532A (en) * 2011-12-02 2013-06-13 Krohne Messtechnik Gmbh Vortex flow-meter

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