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1. (WO1998050800) FOG PIERCING RANGING APPARATUS AND METHOD
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/050800 International Application No.: PCT/US1998/009852
Publication Date: 12.11.1998 International Filing Date: 11.05.1998
Chapter 2 Demand Filed: 09.12.1998
IPC:
G01S 7/00 (2006.01) ,G01S 13/60 (2006.01) ,G01S 13/86 (2006.01) ,G01S 13/87 (2006.01) ,G01S 13/93 (2006.01) ,G01S 17/10 (2006.01)
G PHYSICS
01
MEASURING; TESTING
S
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
7
Details of systems according to groups G01S13/, G01S15/, G01S17/127
G PHYSICS
01
MEASURING; TESTING
S
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
13
Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
02
Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
50
Systems of measurement based on relative movement of target
58
Velocity or trajectory determination systems; Sense-of-movement determination systems
60
wherein the transmitter and receiver are mounted on the moving object, e.g. for determining ground speed, drift angle, ground track
G PHYSICS
01
MEASURING; TESTING
S
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
13
Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
86
Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
G PHYSICS
01
MEASURING; TESTING
S
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
13
Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
87
Combinations of radar systems, e.g. primary radar and secondary radar
G PHYSICS
01
MEASURING; TESTING
S
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
13
Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
88
Radar or analogous systems, specially adapted for specific applications
93
for anti-collision purposes
G PHYSICS
01
MEASURING; TESTING
S
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
17
Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
02
Systems using the reflection of electromagnetic waves other than radio waves
06
Systems determining position data of a target
08
for measuring distance only
10
using transmission of interrupted pulse-modulated waves
Applicants:
LASER TECHNOLOGY, INC. [US/US]; 7070 South Tucson Way Englewood, CO 80112, US
Inventors:
ELLIOTT, Scott; US
MILLER, Eric, A.; US
DUNNE, Jeremy, G.; US
Agent:
WAHL, John, R. ; Holland & Hart L.L.P. Suite 3200 555 17th Street P.O. Box 8749 Denver, CO 80201-8749, US
Priority Data:
08/853,60909.05.1997US
Title (EN) FOG PIERCING RANGING APPARATUS AND METHOD
(FR) APPAREIL DE TELEMETRIE CAPABLE DE PERCER LE BROUILLARD ET PROCEDE
Abstract:
(EN) An apparatus and method for accurately determining a target distance in adverse weather conditions utilizing both LASER and RADAR is disclosed. The radar signals (100) are used to determine an approximate range (104) which is then used as a gating window (106) for the determination of which laser reflection is from the actual target as opposed to a reflection from the atmospheric interference. The method basically comprises the steps of initiating a radar pulse (100) in the direction of a target and receiving a reflection (102), transmitting a laser signal (110) and receiving a plurality of reflections (112), determining an approximate range based on the radar signals (104), and using this approximate range to ascertain which of the laser reflections is from the target. This determination is preferably made by generating a gating signal and gate width from the radar signals (120) and passing the set of laser range signals through the gate to eliminate the false signals and select the signal that survives the gate as the accurate target range.
(FR) L'invention concerne un appareil et un procédé permettant de déterminer précisément une distance cible dans de mauvaises conditions météorologiques à l'aide d'un LASER et d'un RADAR. Les signaux radar (100) sont utilisés pour déterminer une distance approximative (104), laquelle est ensuite utilisée comme fenêtre de repérage (106) pour déterminer quelle réflexion de laser provient de la cible réelle, par opposition à une réflexion provenant du bruit atmosphérique. Le procédé comporte fondamentalement les étapes consistant à lancer une impulsion radar (100) en direction d'une cible et recevoir une réflexion (102); émettre un signal laser (110) et recevoir plusieurs réflexions (112); déterminer une distance approximative sur la base des signaux radar (104), et utiliser cette distance approximative pour déterminer laquelle des réflexions laser provient de la cible. On effectue cette détermination de préférence en produisant un signal de repérage et une largeur de porte à partir des signaux radar (120), et en faisant passer l'ensemble des signaux laser à travers la porte pour éliminer les faux signaux et pour sélectionner le signal ayant passé la porte comme représentant la distance cible précise.
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Designated States: AU, BR, CA
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)