Return pulse shape analysis for falling edge object...

G - Physics – 01 – S

Patent

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G01S 13/10 (2006.01) B64D 45/04 (2006.01) G01S 7/292 (2006.01) G01S 17/10 (2006.01)

Patent

CA 2742687

A LIDAR optical remote sensing system and method is disclosed. The system and method analyzes the falling edge profile of a return LIDAR signal that may be indicative of an object or an aerosol cloud, which is generally more diffuse. Use of the falling edge profile permits burnthrough to an object that may be obscured by the aerosol cloud. The profile is compared against at least one threshold that may correspond, in various embodiments, to a negative slope of the falling edge, an integrated power under the falling edge, or a range estimate error for varying transmitted power values, varying transmitted pulse lengths and/or varying receiver detector field of view values.

On décrit un système et un procédé de télédétection optique par LIDAR, qui analysent le profil de front descendant dun signal LIDAR de retour pouvant indiquer un objet ou un nuage daérosol, lequel est généralement plus diffus. Lutilisation du profil de front descendant permet la traversée jusquà un objet qui pourrait être masqué par le nuage daérosol. Le profil est comparé à au moins un seuil pouvant correspondre, dans divers modes de réalisation, à une pente négative du front descendant, à une puissance intégrée sous le front descendant ou à une erreur sur lestimation de distance pour des valeurs variables de puissance émise, des longueurs variables dimpulsions émises et / ou des valeurs variables de champ de vision du détecteur de réception.

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