초록 ▼

Multiple two-dimensional variation patterns are extracted from two-dimensional sheet measurement data of sheet material being manufactured with the variation patterns being classified to identify the causes of the extracted patterns. The extracted two-dimensional variation patterns are identified wi

Multiple two-dimensional variation patterns are extracted from two-dimensional sheet measurement data of sheet material being manufactured with the variation patterns being classified to identify the causes of the extracted patterns. The extracted two-dimensional variation patterns are identified with the elements or components of the process or machine which caused the patterns. The machine components which cause the variation patterns can then be adjusted and/or controlled so that the patterns can be reduced or substantially eliminated in sheets of material produced by the machine. In addition to adjustment and/or control of the process or machine producing the sheet of material, the extracted variation patterns can be used as new representations of sheet quality, process or machine quality and the patterns will provide more in-depth understanding for operators of the machine.

대표청구항 ▼

1. A method for determining variations of a sheet of material as said sheet of material is being manufactured comprising the steps of:measuring at least one characteristic of said sheet across at least a portion of an entire width of said sheet to generate a two-dimensional measurement of sheet vari

1. A method for determining variations of a sheet of material as said sheet of material is being manufactured comprising the steps of:measuring at least one characteristic of said sheet across at least a portion of an entire width of said sheet to generate a two-dimensional measurement of sheet variations; identifying at least one variation pattern which can be within said two-dimensional measurement as a result of manufacture of said sheet by determining at least one basis function closely associated with said variation pattern; processing said two-dimensional measurement to extract a variation pattern corresponding to said at least one variation pattern from said two-dimensional measurement by: convoluting said at least one basis function with said two-dimensional measurement to get a coefficient corresponding to said basis function; and constructing said variation pattern as a combination of said coefficient with said basis function; and utilizing said extracted variation pattern for the manufacture of said sheet of material.