Measurement of elastic modulus of moving web
AssigneeValmet Automation Oy
InventorsMarkku Mäntylä, Jussi Graeffe, Anna-Leena Erkkilä
Life of this patent
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Abstract
According to an example aspect of the present invention, there is provided a method, comprising: controlling suction with predetermined force in a known measurement area to a moving cardboard or paper web in a manufacturing process, detecting on-line measurement information on deviation of the moving cardboard or paper web in the manufacturing process caused by the suction with predetermined force in the known measurement area, and determining elastic modulus of the moving cardboard or paper web in the manufacturing process on the basis of the measured deviation.
Claims14
An apparatus, comprising:
- a suction unit configured for applying suction with a predetermined force in a known measurement area to a moving cardboard or paper web in a manufacturing process,
- a deviation sensing unit configured for on-line measurement of deviation of the moving cardboard or paper web in the manufacturing process caused by the applied suction in the known measurement area, wherein the deviation sensing unit comprises a three-dimensional scanners configured to define three-dimensional surface profile of the cardboard or paper web in the measurement area and store a set of coordinate points forming a point cloud, and
- a computing unit configured for determining elastic modulus of the moving cardboard or paper web on the basis of the three-dimensional surface profile.
A method for measurement of elastic modulus of a moving cardboard or paper web, comprising:
- controlling suction with predetermined force in a known measurement area to a moving cardboard or paper web in a manufacturing process,
- detecting on-line measurement information on deviation of the moving cardboard or paper web in the manufacturing process caused by the suction with predetermined force in the known measurement area, wherein a three-dimensional surface profile of the cardboard or paper web in the measurement area is provided and a set of coordinate points forming a point cloud is stored, and
- determining elastic modulus of the moving cardboard or paper web in the manufacturing process on the basis of the three-dimensional surface profile.
A non-transitory computer readable medium, comprising computer program code for, when executed in a processor of a computing device for an elastic modulus measurement system, causing the computing device at least to:
- control suction by a suction unit with predetermined force in a known measurement area to a moving cardboard or paper web in a manufacturing process,
- detect from a deviation sensing unit on-line measurement information on the deviation of the moving cardboard or paper web in the manufacturing process caused by the suction with predetermined force in the known measurement area, wherein a three-dimensional profile of the cardboard or paper web in the measurement area is provided and a set of coordinate points forming a point cloud is stored, and
- determine elastic modulus of the moving cardboard or paper web in the manufacturing process on the basis of the three-dimensional surface profile.
Dependencies are inferred from the claim text.