Method for monitoring quality of paper web

Details Method for monitoring quality of paper web Method for monitoring quality of paper web

G - Physics

01

N

G01N 21/89 (2006.01) D21C 9/08 (2006.01) D21F 1/06 (2006.01) D21G 9/00 (2006.01) G01N 33/34 (2006.01)

Patent

CA 2359315

A method for monitoring the quality of a paper web in a continuous process. In the method, a moving paper web is imaged with a thermal camera, whereby the web areas that differ from the moisture level of the surrounding areas or the areas whose coating differs in quantity from the rest of the coated web can be detected in the thermal camera image, and on this basis the process can be controlled to achieve a better end result.

L'invention se rapporte à un procédé de contrôle de la qualité d'une bande de papier dans un processus continu. Selon ledit procédé, on génère une image d'une bande de papier en mouvement à l'aide d'une caméra thermique. L'image de ladite caméra thermique permet de détecter les zones de bande qui diffèrent de part leur taux d'humidité des zones avoisinantes ainsi que les zones dont le revêtement diffère en quantité du reste de la bande enduite, ce qui rend possible un contrôle du processus aux fins d'obtention d'un meilleur résultat final.

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