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1. WO2002025303 - DOPPLER ROTATIONAL VELOCITY SENSOR

Publication Number WO/2002/025303
Publication Date 28.03.2002
International Application No. PCT/US2001/029866
International Filing Date 21.09.2001
IPC
G01P 3/36 2006.01
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
3Measuring linear or angular speed; Measuring differences of linear or angular speeds
36Devices characterised by the use of optical means, e.g. using infra-red, visible, or ultra-violet light
G01P 3/44 2006.01
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION OR SHOCK; INDICATING PRESENCE OR ABSENCE OF MOVEMENT;  INDICATING DIRECTION OF MOVEMENT 
3Measuring linear or angular speed; Measuring differences of linear or angular speeds
42Devices characterised by the use of electric or magnetic means
44for measuring angular speed
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 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 17/88 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
CPC
G01P 3/366
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
3Measuring linear or angular speed; Measuring differences of linear or angular speeds
36Devices characterised by the use of optical means, e.g. using infra-red, visible, or ultra-violet light
366by using diffraction of light
G01P 3/44
GPHYSICS
01MEASURING; TESTING
PMEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
3Measuring linear or angular speed; Measuring differences of linear or angular speeds
42Devices characterised by the use of electric or magnetic means
44for measuring angular speed
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 17/88
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
G01S 7/4818
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
4818using optical fibres
Applicants
  • YANKEE ENVIRONMENTAL SYSTEMS, INC. [US]/[US]
Inventors
  • HOLTON, Carvel, E.
Agents
  • COLBURN, Philmore, H., II
Priority Data
60/234,36922.09.2000US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DOPPLER ROTATIONAL VELOCITY SENSOR
(FR) DETECTEUR DE VITESSE DE ROTATION DOPPLER
Abstract
(EN)
The disclosed invention concept utilizes a homodyne/heterodyne interferometer technique in a modified lidar in such a manner as to sense the rotational velocity magnitude and sense of a rotating (or 'spinning') object 306. Sensing is accomplished in assessing either the Doppler bandwidth of a single axis system (Fig 2) or in sensing the frequency separation of Doppler spectrums in a 'two' axis system (Fig 5). The technique is unique in that the Doppler bandwidth is linearly proportional to rotational velocity and independent of intercept position (Fig. 3B) in the rotation plane. The technique as disclosed is based on optical fiber lidar techniques, but can be implemented in freespace optics as well. The disclosed invention therefore comprises both a technique for utilization of an optical fiber lidar and a new arrangement of lidar elements. Compact and cost effective, standoff rotation velocity sensors and systems can be fabricated with this technique.
(FR)
Le concept selon la présente invention repose sur l'utilisation d'une technique d'interféromètre homodyne/hétérodyne dans un lidar modifié de manière à détecter l'importance de la vitesse de rotation et à détecter un objet en rotation (ou tournant). Pour effectuer cette détection, on estime la largeur de bande Doppler d'un système à un seul axe ou bien on détecte l'espacement de fréquences des spectres Doppler dans un système à deux axes. La technique est unique en ce que la largeur de bande Doppler est linéairement proportionnelle à la vitesse de rotation et indépendante de la position d'interception dans le plan de rotation. Cette technique telle qu'elle est ici présentée est fondée sur des techniques de lidar à fibres optiques mais peut être également mise en oeuvre dans l'optique de l'espace. Cette invention comprend ainsi à la fois une technique d'utilisation d'un lidar à fibres optique et une nouvelle disposition des éléments de lidar. A l'aide de cette technique, on peut fabriquer des systèmes et des capteurs de vitesse de rotation à distance qui sont compacts et efficaces en terme de coûts.
Also published as
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