Method of determining a volumetric percentage of air in a...

Details Method of determining a volumetric percentage of air in a... Method of determining a volumetric percentage of air in a...

D - Textiles, Paper

21

F

D21F 11/00 (2006.01) D21D 5/26 (2006.01) D21F 1/02 (2006.01) D21G 9/00 (2006.01) G01F 5/00 (2006.01)

Patent

CA 2291625

In a paper-making machine, a method of determining a volumetric percentage of air in a fiber suspension for delivery to a headbox. The fiber suspension is transported through a fluid conduit (22). A sound transmitter (26A) and a target receiver (26B) are positioned relative to the fluid conduit (22). A sound is transmitted through the fiber suspension from the sound transmitter (26A) to the target receiver (26B). A speed of the transmitted sound from the sound transmitter (26A) to the target receiver (22B) is established. The volumetric percentage of air in the fiber suspension is determined, dependent upon the established speed of sound.

On décrit un procédé s'appliquant à une machine de fabrication du papier et servant à déterminer un pourcentage volumétrique d'air dans une suspension de fibres destinée à alimenter une caisse de tête. La suspension de fibres est acheminée à travers un conduit fluidique (22). Un émetteur de son (26A) et un récepteur cible (26B) sont placés relativement au conduit fluidique (22). Un son est transmis de l'émetteur de son (26A) au récepteur cible (26B) à travers la suspension de fibres et une vitesse du son transmis est mesurée. Le pourcentage volumétrique d'air dans la suspension de fibres est déterminé sur la base de la vitesse du son mesurée.

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