Method for an automated visual range measurement by means of...

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G01S 17/08 (2006.01) G01S 7/487 (2006.01) G01S 17/95 (2006.01)

Patent

CA 2219010

For automated visual range measurement by a LIDAR system, a distance measuring range is first determined through repeated evaluation of a voltage level U(R) which indicates the intensity of a threshold value. After random initialization of a start value, the start value is then replaced each time with a new mean visual range, resulting in iterative improvements, and the mean visual range in the determined range is then displayed automatically as soon as the visual range lies within the measuring range of the LIDAR system. Using the Klett method, the accuracy can be determined with the aid of a breaking-off criterion in the form of a threshold value with respect to a deviation percentage between a new and a previous calculation. With this method the deviation can be identified to an order of magnitude of about 10%.

Pour mesurer automatiquement une portée visuelle au moyen d'un système LIDAR, une plage de mesure de distance est d'abord déterminée par évaluation répétée d'un niveau de tension U(R) indiquant l'intensité d'une valeur de seuil. Après initialisation aléatoire d'une valeur de départ, celle-ci est remplacée chaque fois par une nouvelle portée visuelle moyenne, ce qui produit des améliorations itératives, puis la portée visuelle moyenne dans la plage déterminée est affichée automatiquement dès que la portée visuelle se trouve dans la plage de mesure du système LIDAR. La méthode Klett permet de déterminer l'exactitude du résultat à l'aide d'un critère de rupture sous forme d'une valeur de seuil par rapport à un pourcentage de déviation entre un nouveau calcul et un calcul antérieur. Ce pourcentage peut atteindre environ 10 %.

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