JPS554575A - Method and apparatus for measuring flow velocity distribution and flow rate by laser doppler method - Google Patents

Method and apparatus for measuring flow velocity distribution and flow rate by laser doppler method

Info

Publication number
JPS554575A
JPS554575A JP7820678A JP7820678A JPS554575A JP S554575 A JPS554575 A JP S554575A JP 7820678 A JP7820678 A JP 7820678A JP 7820678 A JP7820678 A JP 7820678A JP S554575 A JPS554575 A JP S554575A
Authority
JP
Japan
Prior art keywords
light
laser beam
stopping
optical fibers
broad
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
JP7820678A
Other languages
Japanese (ja)
Inventor
Noboru Nakatani
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP7820678A priority Critical patent/JPS554575A/en
Publication of JPS554575A publication Critical patent/JPS554575A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/26—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave

Abstract

PURPOSE:To enable three-dimensional distributions of the velocities of flow to be measured by expanding a laser beam to create a thin and broad laser beam, entering the same to the measuring target and leading the interference light on the image plane thereof to photo detectors by using multiple optical fibers. CONSTITUTION:As incident light to a fluid field, a laser beam is used by stopping the same to linear form by a spherical lens SL of a long focus or stopping to a broad and thin beam by a cylindrical lens CL in order to improve space resolution and obtain strong scattering light. Of the scattered light having been subjected to Doppler shift by the scattering particles contained in the fluid, two angle components are drawn out with the mask M on the focus of a projecting lens Pr and are let to interfere on the image plane, on which a plurality of photo detectors D are placed and the light is led into these detectors D through a number of optical fibers F, whereby the beat signals are measured.
JP7820678A 1978-06-27 1978-06-27 Method and apparatus for measuring flow velocity distribution and flow rate by laser doppler method Pending JPS554575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7820678A JPS554575A (en) 1978-06-27 1978-06-27 Method and apparatus for measuring flow velocity distribution and flow rate by laser doppler method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7820678A JPS554575A (en) 1978-06-27 1978-06-27 Method and apparatus for measuring flow velocity distribution and flow rate by laser doppler method

Publications (1)

Publication Number Publication Date
JPS554575A true JPS554575A (en) 1980-01-14

Family

ID=13655550

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7820678A Pending JPS554575A (en) 1978-06-27 1978-06-27 Method and apparatus for measuring flow velocity distribution and flow rate by laser doppler method

Country Status (1)

Country Link
JP (1) JPS554575A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56132500A (en) * 1980-03-19 1981-10-16 Hitachi Ltd Jet pump for nuclear furnace
JPS6233615A (en) * 1985-08-08 1987-02-13 Toshiba Mach Co Ltd Forming of plastic sheet
FR2610410A1 (en) * 1987-01-30 1988-08-05 Onera (Off Nat Aerospatiale) MOSAIC VELOCIMETER OF OPTICAL FIBERS
US5565219A (en) * 1993-09-14 1996-10-15 Kabushiki Kaisha Kobe Seiko Sho Bank quantity adjusting device for extruder
JP2012521003A (en) * 2009-03-18 2012-09-10 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Apparatus for determining fluid flow characteristics
KR20190046927A (en) 2016-10-07 2019-05-07 가부시키가이샤 고베 세이코쇼 Screw extruder

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56132500A (en) * 1980-03-19 1981-10-16 Hitachi Ltd Jet pump for nuclear furnace
JPH0130000B2 (en) * 1980-03-19 1989-06-15 Hitachi Ltd
JPS6233615A (en) * 1985-08-08 1987-02-13 Toshiba Mach Co Ltd Forming of plastic sheet
JPH0232127B2 (en) * 1985-08-08 1990-07-18 Toshiba Machine Co Ltd
FR2610410A1 (en) * 1987-01-30 1988-08-05 Onera (Off Nat Aerospatiale) MOSAIC VELOCIMETER OF OPTICAL FIBERS
EP0277877A2 (en) * 1987-01-30 1988-08-10 Office National D'etudes Et De Recherches Aerospatiales(O.N.E.R.A.) Speedometer with a fibre-optic array
US5565219A (en) * 1993-09-14 1996-10-15 Kabushiki Kaisha Kobe Seiko Sho Bank quantity adjusting device for extruder
JP2012521003A (en) * 2009-03-18 2012-09-10 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Apparatus for determining fluid flow characteristics
KR20190046927A (en) 2016-10-07 2019-05-07 가부시키가이샤 고베 세이코쇼 Screw extruder

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