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.
Claims27
1-16. (canceled)
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 fibrous material 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
- providing the digital image with a sufficiently high resolution to cause an edge length of a pixel to correspond to less than 20 μm of the imaged area A.
An apparatus for determining the fiber orientation of a moving fibrous material web, paper web, cardboard web or cellulose web, the apparatus comprising:
- an illumination device for illuminating an area A of the fibrous material web, said illumination device configured to illuminate the fibrous material web for a time period of 1 μs or less;
- and
- a camera for recording a digital image of the illuminated area A of the fibrous material web, said camera configured to cause an edge length of a pixel to correspond to at most 20 μm.
Dependencies are inferred from the claim text.