Process for transforming a high resolution profile to a control profile by filtering and decimating data
AssigneeMeasurex Devron Inc.
InventorsEdwin M. G. Heaven, Christopher B. Lynch, Par O. A. Hallman
Life of this patent
Estimating the term…
Abstract
A process for transforming a plurality of data points n defining a high resolution profile for a parameter of a sheet material being manufactured into a low resolution profile for control of the parameter is disclosed. The process involves filtering the data points of the high resolution profile using an anti-aliasing filter function to create an intermediate profile and reducing the number of datapoints of the intermediate profile by an integer factor to create the low resolution profile to be used to control the parameter.
Claims8
A process for transforming a plurality of data points n defining a high resolution profile for a parameter of a sheet material being manufactured into a low resolution profile for control of the parameter comprising the steps of:
- filtering the data points of the high resolution profile using an anti-aliasing filter function to create an intermediate profile;
- and
- reducing the number of datapoints of the intermediate profile by an integer factor to create the low resolution profile to be used to control the parameter.
A process for controlling a parameter of a sheet material which is being manufactured comprising the steps of:
- (a) causing the sheet material to travel;
- (b) moving a scanning means across the sheet;
- (c) measuring a parameter of the sheet with the scanning means in a plurality of zones, n, which are disposed side-by-side across the sheet to produce a plurality of data points that define a high resolution or mini-slice profile;
- (d) filtering the data points using an anti-aliasing filter function to produce an intermediate profile;
- (e) reducing the number of data points by an integer factor to create a low resolution or control profile;
- (f) controlling the parameter based upon the low resolution profile.
Dependencies are inferred from the claim text.