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1. WO1995033999 - FLUID VELOCITY MEASUREMENT APPARATUS

Publication Number WO/1995/033999
Publication Date 14.12.1995
International Application No. PCT/GB1995/001278
International Filing Date 02.06.1995
Chapter 2 Demand Filed 02.01.1996
IPC
G01P 5/00 2006.01
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
5Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
G01S 7/481 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/, G01S15/, G01S17/127
48of systems according to group G01S17/58
481Constructional features, e.g. arrangements of optical elements
G01S 7/497 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/, G01S15/, G01S17/127
48of systems according to group G01S17/58
497Means for monitoring or calibrating
G01S 17/58 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO 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
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
50Systems of measurement based on relative movement of target
58Velocity or trajectory determination systems; Sense-of-movement determination systems
G01S 17/89 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO 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
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
88Lidar systems, specially adapted for specific applications
89for mapping or imaging
CPC
G01P 5/001
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
5Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
001Full-field flow measurement, e.g. determining flow velocity and direction in a whole region at the same time, flow visualisation
G01P 5/26
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
5Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
26by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
G01S 17/58
GPHYSICS
01MEASURING; TESTING
SRADIO 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
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02Systems using the reflection of electromagnetic waves other than radio waves
50Systems of measurement based on relative movement of target
58Velocity or trajectory determination systems; Sense-of-movement determination systems
G01S 17/89
GPHYSICS
01MEASURING; TESTING
SRADIO 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
17Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
88Lidar systems specially adapted for specific applications
89for mapping or imaging
G01S 2007/52014
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
52of systems according to group G01S15/00
52004Means for monitoring or calibrating
52014involving a reference reflector integrated in the sensor or transducer configuration
G01S 7/4812
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
48of systems according to group G01S17/00
481Constructional features, e.g. arrangements of optical elements
4811common to transmitter and receiver
4812transmitted and received beams following a coaxial path
Applicants
  • ISIS INNOVATION LIMITED [GB]/[GB] (AllExceptUS)
  • AINSWORTH, Roger, William [GB]/[GB] (UsOnly)
  • THORPE, Steven, John [GB]/[GB] (UsOnly)
Inventors
  • AINSWORTH, Roger, William
  • THORPE, Steven, John
Agents
  • PERKINS, Sarah
Priority Data
9411280.206.06.1994GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) FLUID VELOCITY MEASUREMENT APPARATUS
(FR) APPAREIL DE MESURE DE VITESSE DES FLUIDES
Abstract
(EN)
Fluid velocity measurement apparatus which utilises Doppler-shift spectral analysis includes a narrow line width light source (1), the light from which passes through a beam expander (3) to provide an irradiated region, for example a two-dimensional plane, in which velocity measurements may be taken. Light scattered from small particles in the irradiated region is collected in an imaging system (4) which enables spectral analysis of the scattered light for determining the velocity of the light scattering particles in the irradiated region. A single camera (13) is used in the imaging system (4) to obviate the need for costly electronics to synchronise images obtained. Also to improve the accuracy of measurement, selected parameters of the apparatus may be measured (2,5) to allow for perturbations in the velocity measurements obtained.
(FR)
Un appareil de mesure de vitesse des fluides, qui permet d'utiliser l'analyse spectrale à décalage Doppler, comprend une source lumineuse (1) à éclairage étroit dont la lumière traverse un dilatateur de faisceau (3) pour éclairer une zone, un plan bidimensionnel par exemple, où l'on peut effectuer des mesures de vitesse. La lumière diffusée par de petites particules dans cette zone éclairée est collectée par un système d'imagerie (4) qui en permet l'analyse spectrale, d'où une détermination de la vitesse propre aux particules diffusant la lumière dans cette zone éclairée. Une seule caméra (13) est utilisée dans ce système d'imagerie (4) pour éviter le recours à une électronique coûteuse autrement nécessaire pour synchroniser les images obtenues. Pour améliorer la précision de mesure, on peut mesurer (2,5) des paramètres sélectionnés concernant cet appareil pour tenir compte de perturbations introduites dans les mesures de vitesse obtenues.
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