Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1988-05-17
1989-08-22
Tarcza, Thomas H.
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
7386106, 350463, G01P 336, G01P 522, G02B 900
Patent
active
048590550
ABSTRACT:
An aircraft velocimeter comprises means for projecting three pairs of independently generated ribbon-shaped laser beams to a measurement volume located at a predetermined distance from the aircraft with a predetermined separation being maintained between the two ribbon-shaped laser beams of each pair at the measurement volume. The times of flight of atmospheric aerosol particles between the two ribbon-shaped laser beams of corresponding pairs of laser beams are measured as the aerosol particles pass through the measurement volume. From the predetermined distance between the two ribbon-shaped laser beams of each pair and the measured time of flight of an aerosol particle across that predetermined distance, a component of velocity of the aerosol particle relative to the aircraft is calculated for each pair of ribbon-shaped laser beams. From the three components of velocity corresponding to the three pairs of ribbon-shaped laser beams projected to the measurement volume, a vector measurement of the velocity of the aircraft relative to atmospheric particles in the surrounding atmosphere is obtained using an on-board computer programmed with a conventional algorithm.
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Gal George
Morrow Howard E.
Lockheed Missiles & Space Company Inc.
Morrissey John J.
Tarcza Thomas H.
Wallace Linda J.
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