| 摘要 |
The method concerns a method for determination of roll density, wherein the density of the wound roll is determined in connection with the web reel. The method uses the known relation between the length (l), diameter (D), basis weight (b) and density ( rho ) of the wound roll, formula (I). In the method, distortions caused in the measurement results by noise and other disturbances are eliminated by using a recursive time variant least squares method in the processing of the measurement results.
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