System and method for inspecting surfaces using optical...

G - Physics – 01 – B

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G01B 11/14 (2006.01)

Patent

CA 2761805

A system and method for daylight inspection of a surface, such as a railroad track, is disclosed. The disclosed system includes lasers, cameras, and a processor. The lasers are positioned adjacent the surface. The laser emits a beam of light across the surface at a combined intensity of at least 0.15 watts of intensity per inch of width of the surface, and the camera captures images of the surface having the beam of light emitted thereon. The camera includes a bandpass filter which passes only a band of light corresponding to a dip in solar radiation. The laser is selected to provide an emitted light beam which is more intense than the solar radiation at the dip. The processor formats the images so that they can be analyzed to determine various measurable aspects of the surface. The system and method includes one or more algorithms for determining these measurable aspects of the surface.

L'invention porte sur un système et un procédé pour une inspection, à la lumière du jour, d'une surface, telle qu'une voie ferrée. Le système divulgué comprend des lasers, des caméras et un processeur. Les lasers sont positionnés adjacents à la surface. Le laser émet un faisceau de lumière à travers la surface à une intensité combinée d'au moins 0,15 watt d'intensité par pouce de largeur de la surface, et la caméra capture des images de la surface ayant le faisceau de lumière émis sur celle-ci. La caméra comprend un filtre passe-bande qui passe uniquement une bande de lumière correspondant à un creux dans un rayonnement solaire. Le laser est choisi pour fournir un faisceau de lumière émis qui est plus intense que le rayonnement solaire au niveau du creux. Le processeur formate les images de telle sorte qu'elles peuvent être analysées pour déterminer divers aspects mesurables de la surface. Le système et le procédé comprennent un ou plusieurs algorithmes pour déterminer ces aspects mesurables de la surface.

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