Device and method for the contactless detection of...

G - Physics – 01 – N

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Details

G01N 21/89 (2006.01) G01N 33/12 (2006.01)

Patent

CA 2718201

The invention relates to a device (10) for the detection of characteristics of continuously delivered translucent products (15), comprising a transmission unit (11, 12) having a light source (16, 17) for generating high-intensity light radiation, a light shaping element (18, 19) for forming a planar light field from the light radiation, and a focusing element (20, 21) for forming a line of light from the planar light field extending transversely to the delivery direction F of the products (15), and a receiving unit (13) having a detection means (22) for accommodating light radiation transflected from the product (15), a shading element (23, 24) being disposed between the transmission unit (11, 12) and the receiving unit (13), characterized in that at least two transmission units (11, 12) are provided with a corresponding design such that at least two independent light sources (16, 17) are provided for illuminating the product (15), wherein a transmission unit (12) is disposed in the delivery direction F of the products (15) in front of the receiving unit (13), and the other transmission unit (11) is disposed in the delivery direction F behind the receiving unit (13). The invention further relates to a corresponding method.

L'invention concerne un dispositif (10) pour détecter des caractéristiques de produits (15) translucides, transportés en continu. Le dispositif comporte d'une part une unité d'émission (11, 12) destinée à générer un rayonnement lumineux de forte intensité et pourvue d'une source lumineuse (16, 17), d'un élément de transformation de lumière (18, 19) destiné à former un champ lumineux plan à partir du rayonnement lumineux, et d'un élément de concentration (20, 21) destiné à former une ligne lumineuse transversale par rapport à la direction de transport F des produits (15) à partir du champ lumineux plan; et, d'autre part, une unité de réception (13) destinée à recevoir le rayonnement lumineux transmis et/ou réfléchi par le produit (15) et pourvue d'un moyen de détection (22), un élément d'obscurcissement (23, 24) étant disposé entre l'unité d'émission (11, 12) et l'unité de réception (13). Ledit dispositif se caractérise en ce qu'au moins deux unités d'émission (11, 12) ayant une structure correspondante comportent au moins deux sources lumineuses (16, 17) indépendantes pour éclairer le produit (15), une unité d'émission (12) étant disposée dans la direction du transport F des produits (15) devant l'unité de réception (13) et l'autre unité d'émission (11) étant disposée dans la direction de transport F derrière l'unité de réception (13). L'invention concerne en outre un procédé correspondant.

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