G - Physics – 01 – B
Patent
G - Physics
01
B
G01B 11/00 (2006.01) G01B 11/06 (2006.01)
Patent
CA 2418898
The invention relates to a method for measuring the surface height of a material bed transported on a conveyor belt to continuously operated thermal treatment, i.e. to continuously operated sintering, when said material bed is formed of single spherical and fragile particles. According to the invention, the material bed (3) formed on the conveyor belt (4) is illuminated, essentially in the transversal direction of the conveyor belt (4), by at least one light source (5), so that the light beam (6) forms an essentially linear light streak (7) on the surface of the material bed (3), and that for registering said light streak (7), there is used at least one camera (8) and at least one image processing arrangement (9) connected to the camera (8), and that in the image processing arrangement (9), the obtained surface height image is compared with a predetermined, desired surface height image in order to detect deviations in the surface height, and that said image processing arrangement (9) is connected to an automation unit (10) in order to correct the deviations in the surface height.
L'invention porte sur un procédé de mesure de la hauteur de la surface d'un lit de matériau transporté sur la bande d'un convoyeur où se fait un traitement thermique de frittage en continu, ledit lit de matériau étant fait de particules sphériques isolées et fragiles. Selon l'invention, le lit (3) de matériau formé sur la bande (4) du convoyeur est éclairé, principalement perpendiculairement à la bande du convoyeur (4) par au moins une source lumineuse (5) de manière à ce que le faisceaux lumineux (6) forme un trait (7) lumineux quasiment rectiligne à la surface du lit (3) de matériau. Pour enregistrer ledit trait lumineux (7) on utilise au moins une caméra (8) et au moins un dispositif (9) de traitement de l'image relié à la caméra, l'image de hauteur de surface étant comparée à une hauteur de surface prédéterminée désirée afin de pouvoir détecter les écarts de hauteur de surface. Le dispositif (9) de traitement de l'images est relié à une unité automatique (10) afin de corriger les écarts de hauteur de la surface.
Niemela Pekka
Pirttimaa Jouko
Rovanen Raimo
Tulkki Olavi
Vaananen Eero
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Outokumpu Oyj
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