JPS5793258A - Vector measuring type optical fiber flow velocity gauge - Google Patents

Vector measuring type optical fiber flow velocity gauge

Info

Publication number
JPS5793258A
JPS5793258A JP16795880A JP16795880A JPS5793258A JP S5793258 A JPS5793258 A JP S5793258A JP 16795880 A JP16795880 A JP 16795880A JP 16795880 A JP16795880 A JP 16795880A JP S5793258 A JPS5793258 A JP S5793258A
Authority
JP
Japan
Prior art keywords
frequency
optical fiber
dimensionally
laser light
mirrors
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
JP16795880A
Other languages
Japanese (ja)
Inventor
Noritaka Kurauchi
Kenichi Yoshida
Kozo Ono
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP16795880A priority Critical patent/JPS5793258A/en
Publication of JPS5793258A publication Critical patent/JPS5793258A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

PURPOSE:To detect a flow rate in a vector manner, by a method wherein, in a laser Doppler flow rate gauge, a maneuvarability is improved by employing a optical fiber at a sensor part, and the optical fiber is placed two-dimensionally or three-dimensionally. CONSTITUTION:A measuring object is irradiated with a laser light of frequency omegao from a laser light source 1 after the laser light passes through half mirrors 3, 3a, a lense 4, and a optical fiber 10. Meanwhile, a frequency of a laser light passing through half-mirrors 3 and 2 is shifted by a frequency shifter 15 into a frequency omegao+omegac, and produces a reference light passing through half-mirrors 2a and 3a to a lens 7. A frequency of a reflection light from the measuring object is shifted into a DELTAomega frequency, and the reflection light is reflected in the direction of the lens 7 by the half-mirror 3a, the light entering an avalanche photo diode 16 togetherwith said reference light. In a correlator 13, an electric signal, corresponding to a difference omegac-DELTAomega in frequency between the two lights, is obtained, and a flow rate and a direction are found from the absolute value and polarity. The optical fiber 10 is arranged two-dimensionally or three- dimensionally so that it is positioned at a given angle, and this permits finding of two-dimensional or three-dimensional flow velocity vector.
JP16795880A 1980-12-01 1980-12-01 Vector measuring type optical fiber flow velocity gauge Pending JPS5793258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16795880A JPS5793258A (en) 1980-12-01 1980-12-01 Vector measuring type optical fiber flow velocity gauge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16795880A JPS5793258A (en) 1980-12-01 1980-12-01 Vector measuring type optical fiber flow velocity gauge

Publications (1)

Publication Number Publication Date
JPS5793258A true JPS5793258A (en) 1982-06-10

Family

ID=15859191

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16795880A Pending JPS5793258A (en) 1980-12-01 1980-12-01 Vector measuring type optical fiber flow velocity gauge

Country Status (1)

Country Link
JP (1) JPS5793258A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010500086A (en) * 2006-08-09 2010-01-07 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 Light-emitting device specifically for flow measurement
CN111077334A (en) * 2020-01-02 2020-04-28 中国工程物理研究院流体物理研究所 Speed vector measurement optical fiber sensor and measurement method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010500086A (en) * 2006-08-09 2010-01-07 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 Light-emitting device specifically for flow measurement
CN111077334A (en) * 2020-01-02 2020-04-28 中国工程物理研究院流体物理研究所 Speed vector measurement optical fiber sensor and measurement method

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