G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/04 (2006.01) G01N 15/02 (2006.01) G01N 15/14 (2006.01)
Patent
CA 2442073
A device for a transparent pipe (1) of circular cross-section for optically counting and measuring objects (3) carried with a fluid (2) within the pipe (1), in which the light beams exiting through the wall of the pipe (1) are preferably caught by an optical apparatus (4). The outer radius of the pipe (1) equals or nearly equals the product of the inner radius of the pipe (1) and the proportion of the light refraction index of the fluid within the pipe to the light refraction index of the medium surrounding the pipe. The optical apparatus (4) is located at a camera point (11) at a mean distance from the pipe (1) between a distal point of intersection (10) of light beams (7) hitting the internal wall of the pipe (1) at an angle of about five angular degrees, and a proximal point of intersection (12) of light beams hitting the internal wall of the pipe (1) at an angle of about ninety angular degrees relative to the axis of incidence.
L'invention concerne un dispositif destiné à un tuyau transparent (1) de section circulaire, pour le comptage et la mesure optiques d'objets (3) transportés par un fluide (2) dans le tuyau (1), les faisceaux lumineux sortant à travers la paroi du tuyau (1) étant, à cet effet, de préférence captés par un appareil optique (4). Le rayon extérieur du tuyau (1) est parfaitement ou approximativement égal au produit du rayon intérieur du tuyau (1) et de la proportion de l'indice de réfraction de la lumière du milieu entourant le tuyau. L'appareil optique (4) est fixé en un emplacement de caméra (11), à une distance moyenne du tuyau (1), entre un point distal d'intersection (10) des faisceaux lumineux (7) venant frapper la paroi interne du tuyau (1) à un angle supérieur à 5· environ et un point proximal d'intersection (12) des faisceaux lumineux venant frapper la paroi interne du tuyau (1) à un angle de 90· environ, par rapport à l'axe d'incidence.
Kvassheim Torbjorn
Ridout & Maybee Llp
LandOfFree
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