A method for controlling a process for the production of a...

B - Operations – Transporting – 27 – N

Patent

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B27N 1/02 (2006.01) G01N 21/35 (2006.01)

Patent

CA 2322278

A method for controlling a process for the production of a cellulose fibre containing product, during which at least two substances having a substantial influence on the same property of said product in correspondence to the relation between them are added, whereby a calibration model has been established by linking reference property values and corresponding reference relations, by means of a mathematical function, and in that the method comprises applying the calibration model on the actual relation in order to predict the property value; comparing the predicted property value with a desired target property value; and, if said predicted value is not substantially equal to said target value, adjusting the actual relation in a predetermined way; and repeating these operations until said predicted value is substantially equal to said target value.

L'invention se rapporte à un procédé pour contrôler un processus de fabrication d'un produit contenant des fibres de cellulose. Dans ce processus, on ajoute au moins deux substances influant sensiblement sur une même propriété du produit qui correspond au rapport entre ces substances. On établit un modèle d'étalonnage en liant au moyen d'une fonction mathématique les valeurs de référence d'une propriété et le rapport de référence correspondant. Le procédé consiste à appliquer le modèle d'étalonnage au rapport existant afin de prédire la valeur de la propriété en question; à comparer la valeur ainsi prévue de cette propriété à une valeur cible de ladite propriété; et à réguler le rapport en question d'une façon prédéterminée si la valeur prévue n'est pas sensiblement égale à la valeur cible. On répète ces opérations jusqu'à ce que la valeur prévue soit sensiblement égale à la valeur cible.

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