Optical system for detecting and displaying aircraft...

G - Physics – 01 – C

Patent

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G01C 23/00 (2006.01) G01S 17/58 (2006.01)

Patent

CA 2678964

A system and method uses light signals to detect and display the position of an airborne vehicle, such as a helicopter, during takeoff or landing or low speed, low altitude operation. A transmitter on the vehicle emits light signals while an optical receiver retrieves reflected light signals. Using light detection and ranging techniques, various parameters, such as altitude, ground speed and relative wind, are calculated based on the Doppler shift within the reflected light signals. The signals are transmitted in three different directions to facilitate the measurements of different Doppler shifts. The parameters are also displayed on a screen or other visual device within the vehicle.

L'invention concerne un système et un procédé qui utilisent des signaux lumineux pour détecter et afficher la position d'un véhicule en vol, tel qu'un hélicoptère, pendant un décollage ou un atterrissage, ou une opération à faible allure à basse altitude. Un émetteur sur le véhicule émet des signaux lumineux tandis qu'un récepteur optique récupère des signaux lumineux réfléchis. A l'aide de techniques de détection de lumière et de télémétrie, divers paramètres, tels que l'altitude, la vitesse sol et le vent relatif, sont calculés sur la base de la dérive Doppler dans les signaux lumineux réfléchis. Les signaux sont transmis dans trois directions différentes pour faciliter les mesures de différentes dérives Doppler. Les paramètres sont également affichés sur un écran ou un autre dispositif visuel dans le véhicule.

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