Method and apparatus for measuring properties of a moving web

Details Method and apparatus for measuring properties of a moving web Method and apparatus for measuring properties of a moving web

G - Physics

01

N

G01N 21/86 (2006.01) G01N 21/89 (2006.01) G01N 33/34 (2006.01)

Patent

CA 2337158

The invention relates to a method and apparatus for measuring properties of a moving web. A stimulus is directed onto the moving web by an excitation element and the effect of the web on the stimulus is measured with a detection element. At the measuring point the web is supported by a measurement support sheet. The measurement support sheet comprises at least two regions having different but known responsiveness to one or more forms of stimulus or causing different but know transformation to one or more forms of stimulus.

L'invention concerne un procédé et un appareil pour la mesure des propriétés d'une bande en mouvement. Un stimulus est envoyé sur la bande en mouvement par un élément d'excitation et l'effet de la bande sur le stimulus est mesuré à l'aide d'un élément de détection. Au niveau du point de mesure, la bande est soutenue par une feuille de support de mesure qui présente au moins deux régions possédant une réceptivité différente, mais connue, à au moins une forme de stimulus, ou induisant différentes transformations connues par rapport à au moins une forme de stimulus.

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