System and method for controlling the size of material banks...

G - Physics – 01 – N

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G01N 21/84 (2006.01) B29C 43/24 (2006.01) G05D 9/12 (2006.01)

Patent

CA 2264095

The quantity of material contained in a bank (20) between a pair of calendering rolls (10, 12) is determined by digital imaging technology. Manipulation of digital images (40) provided by camera means (30) yields a light-hued image of material in the bank against a dark-hued background. The light-hued image is then divided into control zones associated with discrete regions of the bank fed by separate feed lines (F1, F2). Quantity and distribution of material in the bank can be controlled by adjusting feed rates based on information obtained through the digital images.

La quantité de matière contenue dans le bourrelet (20) entre une paire de rouleaux de calandrage (10, 12) peut être déterminée par une technique d'imagerie numérique. La manipulation des images numériques (40) captées par une caméra (30) fournit une image légèrement teintée de la matière constituant le bourrelet sur un fond fortement teinté. L'image légèrement teintée est ensuite divisée en zones de réglage associées à des régions distinctes du bourrelet alimentées par des conduites d'alimentation (F1, F2) séparées. La quantité et la répartition de la matière constituant le bourrelet peut se régler par ajustement des débits d'alimentation sur la base des informations tirées des images numériques.

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