Method and arrangement in a measuring system

Details Method and arrangement in a measuring system Method and arrangement in a measuring system

G - Physics

01

B

G01B 11/30 (2006.01) G01B 11/24 (2006.01) G01N 21/898 (2006.01)

Patent

CA 2456163

The present invention relates to a method and an arrangement for representing the characteristics of an object (3) by means of a measuring system, in which either the measuring system or the object (3) is designed to move in relation to one another in a predefined direction of movement, the object (3) preferably being designed to move in relation to the measuring system. At least one light source (2) is designed to illuminate the object (3) with a light which is incident upon the object (3) and has a limited dispersion in the direction of movement. An imaging sensor (1), which is arranged on the same side of the object (3) as the light source (2) is designed to pick up light reflected from the object (3) and to convert this into electrical charges. An image-processing unit is furthermore designed to create a digital representation (5) of the object (3) from said electrical charges. The light source (2) is arranged at a predetermined distance from the imaging sensor (1) viewed in the direction of movement, and the image-processing unit is designed to simultaneously read out information on the geometric profile of the object and information on the light dispersion in a predetermined area around said profile.

La présente invention concerne un procédé et un dispositif de représentation des caractéristiques d'un objet (3) au moyen d'un système de mesure. Le système de mesure ou de l'objet (3), de préférence l'objet (3), est conçu pour se déplacer l'un par rapport à l'autre selon un sens de déplacement défini. Une source lumineuse (2) projette sur l'objet (3) une lumière directe à dispersion limitée en respectant le sens de déplacement. Un capteur d'image (1), placé du même côté de l'objet (3) que la source lumineuse (2), capte la lumière renvoyée par l'objet (3) et la convertit en charges électriques. Un module de traitement d'image crée une représentation numérique (5) de l'objet (3) à partir des charges électriques considérées. La source lumineuse (2) est située à une distance définie du capteur d'image (1) observé selon le sens de déplacement. Le module de traitement d'image assure simultanément une lecture des données concernant le profil géométrique de l'objet et de celle concernant la dispersion de la lumière dans une zone définie autour du profil considéré.

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