JPS57147013A - Ultrasonic doppler flow meter - Google Patents

Ultrasonic doppler flow meter

Info

Publication number
JPS57147013A
JPS57147013A JP56031371A JP3137181A JPS57147013A JP S57147013 A JPS57147013 A JP S57147013A JP 56031371 A JP56031371 A JP 56031371A JP 3137181 A JP3137181 A JP 3137181A JP S57147013 A JPS57147013 A JP S57147013A
Authority
JP
Japan
Prior art keywords
fluid
fluid passage
oscillators
radius
angles
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
JP56031371A
Other languages
Japanese (ja)
Inventor
Masao Fukunaga
Koji Saito
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56031371A priority Critical patent/JPS57147013A/en
Publication of JPS57147013A publication Critical patent/JPS57147013A/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
    • G01F1/66—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/663—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 measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters by measuring Doppler frequency shift

Landscapes

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

Abstract

PURPOSE:To obtain a Doppler flow meter where the error due to speed components in the direction of the radius is reduced, by equalizing angles between the axis of a fluid pipe and two sets of current detectors provided toward the upper stream and the lower stream of the fluid passage. CONSTITUTION:Two sets of supporting material 13 are provided on a fluid passage where a fluid 15 to be measured includng a scattered material 16, and supporting materials 13 are provided with current detectors consisting of ultrasonic oscillators 11 and 11 for transmission and ultrasonic oscillators 12 and 12 for receiving so that lines perpendicular to these current detectors are at angles theta0 to the axis of the fluid passage in the upper stream side and the lower stream side respectively. When fluid velocities at points P1 and P2 are denoted as v1 and v2 respectively and angles to the axis of the fluid passage at points P1 and P2 are denoted as theta1 and theta2, a measured mean DELTAvx of oscillators 11 and 12 which is obtained as a Doppler shift frequency is given by expression 11. When both oscillators 11 and 12 are provided close to each other, components in the direction of the radius at points P1 and P2 are equal to each other, and expression 11 becomes DELTAvx=vcostheta0, and the fluid velocity is measured without the influence of components in the direction of the radius by this expression.
JP56031371A 1981-03-06 1981-03-06 Ultrasonic doppler flow meter Pending JPS57147013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56031371A JPS57147013A (en) 1981-03-06 1981-03-06 Ultrasonic doppler flow meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56031371A JPS57147013A (en) 1981-03-06 1981-03-06 Ultrasonic doppler flow meter

Publications (1)

Publication Number Publication Date
JPS57147013A true JPS57147013A (en) 1982-09-10

Family

ID=12329391

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56031371A Pending JPS57147013A (en) 1981-03-06 1981-03-06 Ultrasonic doppler flow meter

Country Status (1)

Country Link
JP (1) JPS57147013A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55113974A (en) * 1979-02-24 1980-09-02 Ebara Corp Ultrasonic current and flow meter utilizing doppler's shift

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55113974A (en) * 1979-02-24 1980-09-02 Ebara Corp Ultrasonic current and flow meter utilizing doppler's shift

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