Analysing method and device for automatically sorting...

G - Physics – 01 – B

Patent

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G01B 11/10 (2006.01) B07C 5/10 (2006.01) B07C 5/342 (2006.01) B07C 5/36 (2006.01) G01B 11/02 (2006.01)

Patent

CA 2377307

The invention concerns a method for analysing products such as fruits transported on a conveying chain which consists in: firstly, providing above said conveyor chain three successive analysing stations (5, 6, 7) one of them (5) comprising two cameras (8, 9) arranged such that their optical axes form a V centred on the products and having a vertex angle ranging between 90 DEG and 130 DEG , and the two others, a camera (12, 14) arranged vertically above the conveyor chain. Moreover, the products are driven in rotation while they are being transported along the analysing stations (5-7), such that the cameras (8, 9, 12, 14) take each several photographs with complementary faces of the surface of said products, and in selecting among the photographs, by comparing the computed theoretical diameter of a product with a predetermined average diameter, the photographs to be retained for obtaining a complete analysis of said product total surface.

L'invention concerne un procédé d'analyse de produits tels que des fruits transportés sur une chaîne de convoyage consistant, en premier lieu, à disposer au-dessus de ladite chaîne de convoyage trois postes successifs d'analyse (5, 6, 7) comportant respectivement pour l'un (5) deux caméras (8, 9) disposées de façon que leurs axes optiques forment un V axé sur les produits et d'angle au sommet compris entre 90 °C et 130 °C, et pour les deux autres, une caméra (12, 14) disposée à l'aplomb de la chaîne de convoyage. De plus, les produits sont entraînés en rotation lors de leur transport le long des postes d'analyse (5-7), de sorte que les caméras (8, 9, 12, 14) prennent chacune plusieurs clichés de faces complémentaires de la surface desdits produits, et l'on sélectionne, parmi les clichés pris, par comparaison entre le diamètre théorique calculé d'un produit et un diamètre moyen prédéterminé, les clichés à retenir de façon à obtenir une analyse complète de la surface totale dudit produit.

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