Method and apparatus for determining the fiber orientation
AssigneeVoith Patent GmbH
InventorsSime Ajit, Samuel Soldan, Michael Abele, Friedrich Kendel
Life of this patent
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Abstract
An apparatus and an associated method determine the fiber orientation of a moving fibrous web, in particular a paper, cardboard or cellulose web. An illumination device illuminates an area of the fibrous web and a camera records a digital image of the illuminated area of the fibrous web. The illumination device is configured to illuminate the fibrous web for a period of time of 1 μs or less and the camera is configured in such a way that the edge length of a pixel corresponds to no more than 20 μm, in particular no more than 10 μm.
Claims14
A method for determining the fiber orientation of a moving fibrous material web, paper web, cardboard web or cellulose web, the method comprising:
- illuminating an area A of the moving fibrous material web, paper web, cardboard web or cellulose web for a time period Δt;
- recording a digital image of the illuminated area A;
- setting the time period Δt to be at most 1 μs;
- and
- the digital image having a sufficiently high resolution to cause an edge length of a pixel of the digital image to correspond to less than 20 μm of the imaged area A;
- calculating the fiber orientation from data of the digital image.
Dependencies are inferred from the claim text.