[go: up one dir, main page]

WO1999035519A3 - Modulated filtered rayleigh scattering - Google Patents

Modulated filtered rayleigh scattering Download PDF

Info

Publication number
WO1999035519A3
WO1999035519A3 PCT/US1999/000691 US9900691W WO9935519A3 WO 1999035519 A3 WO1999035519 A3 WO 1999035519A3 US 9900691 W US9900691 W US 9900691W WO 9935519 A3 WO9935519 A3 WO 9935519A3
Authority
WO
WIPO (PCT)
Prior art keywords
scattered light
modulated
rayleigh scattering
laser
fluid
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.)
Ceased
Application number
PCT/US1999/000691
Other languages
French (fr)
Other versions
WO1999035519A2 (en
Inventor
Philip L Varghese
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.)
University of Texas System
University of Texas at Austin
Original Assignee
University of Texas System
University of Texas at Austin
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 University of Texas System, University of Texas at Austin filed Critical University of Texas System
Priority to AU24556/99A priority Critical patent/AU2455699A/en
Publication of WO1999035519A2 publication Critical patent/WO1999035519A2/en
Publication of WO1999035519A3 publication Critical patent/WO1999035519A3/en
Anticipated expiration legal-status Critical
Ceased 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/50—Systems of measurement based on relative movement of target
    • G01S17/58—Velocity or trajectory determination systems; Sense-of-movement determination systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

A system and process for measuring velocity of a fluid, such as a supersonic gas jet (44), is disclosed. The system employs modulated laser light (14) from a tunable diode laser (12). By modulated it is meant that the laser is dithered. Scattered light (48) is collected and passed through a cell (50) containing, for example, rubidium. The pattern of the scattered light is compared to a reference standard (18, 20). The Doppler shift of the scattered light versus the reference provides data that is used to calculate the velocity of the fluid.
PCT/US1999/000691 1998-01-12 1999-01-12 Modulated filtered rayleigh scattering Ceased WO1999035519A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24556/99A AU2455699A (en) 1998-01-12 1999-01-12 Modulated filtered rayleigh scattering

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US7125098P 1998-01-12 1998-01-12
US60/071,250 1998-01-12

Publications (2)

Publication Number Publication Date
WO1999035519A2 WO1999035519A2 (en) 1999-07-15
WO1999035519A3 true WO1999035519A3 (en) 1999-09-30

Family

ID=22100191

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/000691 Ceased WO1999035519A2 (en) 1998-01-12 1999-01-12 Modulated filtered rayleigh scattering

Country Status (2)

Country Link
AU (1) AU2455699A (en)
WO (1) WO1999035519A2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE361472T1 (en) 2002-08-02 2007-05-15 Ophir Corp SYSTEM AND METHOD FOR OPTICALLY MEASURING AIR DATA
US7564539B2 (en) 2002-08-02 2009-07-21 Ophir Corporation Optical air data systems and methods
US8072584B2 (en) 2002-08-02 2011-12-06 Ophir Corporation Optical air data systems and methods
DE102005028268B4 (en) 2005-06-14 2013-12-12 Forschungsverbund Berlin E.V. Method and apparatus for generating and detecting a Raman spectrum
DE102009042404B3 (en) * 2009-09-16 2011-04-14 Technische Universität Dresden A method of determining the velocity of a moving fluid using self-calibration of a laser frequency modulation Doppler Global Velocimeter
GB2532585B (en) * 2013-06-30 2018-04-25 Wind Farm Analytics Ltd Turbine fluid velocity field measurement
US9334807B2 (en) 2014-05-13 2016-05-10 The Boeing Company Methods and apparatus to determine airflow conditions at an inlet of an engine
DE202016102010U1 (en) * 2016-04-15 2017-07-18 Deutsches Zentrum für Luft- und Raumfahrt e.V. aircraft
CN113176582B (en) * 2021-04-27 2023-07-18 厦门大学 A flow velocity detection lidar and flow velocity detection method based on dual-frequency pumping

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4919536A (en) * 1988-06-06 1990-04-24 Northrop Corporation System for measuring velocity field of fluid flow utilizing a laser-doppler spectral image converter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4919536A (en) * 1988-06-06 1990-04-24 Northrop Corporation System for measuring velocity field of fluid flow utilizing a laser-doppler spectral image converter

Also Published As

Publication number Publication date
AU2455699A (en) 1999-07-26
WO1999035519A2 (en) 1999-07-15

Similar Documents

Publication Publication Date Title
WO1999035519A3 (en) Modulated filtered rayleigh scattering
CA2160838A1 (en) Short coherence length, doppler velocimetry system
EP0951112A3 (en) Tunable laser source apparatus having wideband oscillation wavelength continuous sweep function
RU95110696A (en) Device for fire extinguishing
WO2002068905A3 (en) Closure indicator for cockpit traffic display
EP1055941A3 (en) Coherent laser radar apparatus and radar/optical communication system
CA2252159A1 (en) Method and apparatus for on-line monitoring the temperature and velocity of thermally sprayed particles
ATE166800T1 (en) ATOMIZER AND METHOD FOR ATOMIZATION
CA2386468A1 (en) Foam monitoring and control system
Graham et al. Transient molecular concentration measurements in turbulent flows using Rayleigh light scattering
EP1247577A3 (en) System for detecting fluids in a microfluid device
JPS55125427A (en) Method of measuring breaking position of optical
US4940330A (en) Laser Doppler anemometer
DE59601375D1 (en) Method and arrangement for measuring physical quantities of light-scattering moving particles using a laser Doppler anemometer
EP0366206A3 (en) Removing hydrogen sulphide from a gas mixture
HK83388A (en) Wave soldering system
EP0350922A3 (en) Process for catalyst-aldehyde product separation
EP0445293A4 (en) Light receiving system of heterodyne detection and image forming device for light transmission image using said light receiving system
JPS57118136A (en) Fault searching method by optical fiber
FR2398313A1 (en) DEVICE FOR THE SIMULATION OF BORING SIGNALS EMITTED BY A BEACON
Jones et al. Solid state and fibre optic laser Doppler velocimeters
RU2314541C1 (en) Mode of definition of air-speed parameters of the flight of flying vehicles
CA2312094A1 (en) Method for optical three-dimensional velocimetry of scattered particles
EP1396950A3 (en) Optical transmission system, optical transmitter and methods thereof
Cejpek et al. Suitability of different twin-fluid atomizer types for CO2 capture in spray columns: Paper 306

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW SD SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: KR

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase