Automatic cross-directional control zone alignment for sheetmaking systems
AssigneeMeasurex Corporation
InventorGeorge X. He
Life of this patent
Estimating the term…
Abstract
A system for aligning control zones with measurement zones in a sheetmaking system having a plurality of actuators arranged in the cross-direction, comprising the steps of: a) bumping at least one of the actuators; b) measuring a profile of the sheet at a substantial distance from the bumped actuators; and c) determining a location of the effect of each of the bumped actuators on the sheet.
Claims16
A method for aligning control zones with measurement zones in a sheetmaking system having a plurality of actuators arranged in the cross-direction, comprising the steps of:
- bumping at least one of the actuators;
- measuring a profile of the sheet at a substantial distance from the bumped actuators by a scanner scanning the sheet;
- determining the alignment information including the center location of the effect of each of the bumped actuators on the sheet by pattern matching between a cross-directional actuator excitation profile and its response profile measured by the scanner scanning the sheet;
- and
- providing the alignment information as a shrink factor array.
A system for aligning control zones with measurement zones in a sheetmaking system having a plurality of actuators arranged in the cross-direction, the system comprising:
- means for bumping at least one of the actuators;
- means for measuring a profile of the sheet at a substantial distance from the bumped actuators;
- means for determining the alignment information including the location of the effect of each of the bumped actuators on the sheet by pattern matching between the a cross-directional actuator excitation profile and its response profile measured by the scanner scanning the sheet;
- and
- means for providing the alignment information as a shrink factor array.
Dependencies are inferred from the claim text.