JPS57110918A - Gas flowmeter - Google Patents

Gas flowmeter

Info

Publication number
JPS57110918A
JPS57110918A JP55186645A JP18664580A JPS57110918A JP S57110918 A JPS57110918 A JP S57110918A JP 55186645 A JP55186645 A JP 55186645A JP 18664580 A JP18664580 A JP 18664580A JP S57110918 A JPS57110918 A JP S57110918A
Authority
JP
Japan
Prior art keywords
pressure
vortex
karman
output signal
pressure sensor
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
JP55186645A
Other languages
Japanese (ja)
Inventor
Mitsutaka Kinoshita
Yoshiro Danno
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.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors 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 Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP55186645A priority Critical patent/JPS57110918A/en
Publication of JPS57110918A publication Critical patent/JPS57110918A/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

Abstract

PURPOSE:To obtain an output signal corresponding to only the number of vortex generated by compensating a total pressure comprising a pulsating pressure which is included in a main current of a gas flow passage as an external disturbance and the atmospheric pressure in measuring a gas flow rate by detecting the change of pressure corresponding to the number of Karman's vortex. CONSTITUTION:The change of the pressure of Karman's vortex to be generated by a vortex generator 4 inserted into a gas flow passage 2 is detected by No.1 pressure sensor 8 through a pressure detecting hole 7 opened to a vortex passage 6. On the other hand, a compensation pressure detecting hole 21 is provided on the cylindrical wall material 3 opposing to the pressure detecting hole 7 and it is opened to the direction perpendicular to the centerline of vortexs so as not to be influenced by Karman's vortexes and it is connected to No.2 pressure sensor 22. The output signal I from No.1 pressure sensor 8 and the output signal I1 from the No.2 pressure sensor 22 are applied to a compensation circuit 24 composed of known operation amplifiers and an output signal I2 corresponding to only Karman's vortexes is obtained.
JP55186645A 1980-12-27 1980-12-27 Gas flowmeter Pending JPS57110918A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55186645A JPS57110918A (en) 1980-12-27 1980-12-27 Gas flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55186645A JPS57110918A (en) 1980-12-27 1980-12-27 Gas flowmeter

Publications (1)

Publication Number Publication Date
JPS57110918A true JPS57110918A (en) 1982-07-10

Family

ID=16192208

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55186645A Pending JPS57110918A (en) 1980-12-27 1980-12-27 Gas flowmeter

Country Status (1)

Country Link
JP (1) JPS57110918A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60145242U (en) * 1984-03-08 1985-09-26 富士通テン株式会社 engine control device
JPH02268228A (en) * 1989-04-11 1990-11-01 Toray Ind Inc Pressure sensor and gas flowmeter using it

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60145242U (en) * 1984-03-08 1985-09-26 富士通テン株式会社 engine control device
JPH02268228A (en) * 1989-04-11 1990-11-01 Toray Ind Inc Pressure sensor and gas flowmeter using it

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