US5636126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for transforming a high resolution profile to a control profile by filtering and decimating data
Assignee: Measurex Devron Inc
•
Filing: 1995-07-24
•
Granted: 1997-06-03
•
Expires: 2015-07-24
Abstract
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.
Inventors
- 👤 Edwin M. G. Heaven
- 👤 Christopher B. Lynch
- 👤 Par O. A. Hallman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:05
CPC Classifications
D; D21; D21G; D21G9/00; D21G9/0009; D21G9/0027
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
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.
Claim 2
Dependent Claim
84 words
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.
Claim 3
Dependent Claim
86 words
A process as claimed in claim 1 in which filtering the data points involves applying the function f(n)=h(n)w(n) to the n data points of the high resolution profile where f(n) is the anti-aliasing filter function; w(n) is a Hamming filter function having coefficients determined by the equation ##EQU6## where N=the window order of the Hamming function and N is selected by the user; and h(n) is an ideal low pass filter function having coefficients determined by the equation ##EQU7## where ω c is the cutoff frequency.
Claim 4
Dependent Claim
35 words
A process as claimed in claim 2 in which the cutoff frequency, ω c , is related to the number of data points in the high resolution profile per data point in the control profile.
Claim 5
Dependent Claim
25 words
A process as claimed in claim 3 in which the cutoff frequency is selected according to the equation: ##EQU8## where .increment.ω is the transition band.
Claim 6
Dependent Claim
116 words
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.
Claim 7
Dependent Claim
116 words
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.
Claim 8
Dependent Claim
82 words
A process as claimed in claim 5 in which filtering the data points involves applying the formula f(n)=h(n)w(n) to each of the n data points of the high resolution profile where w(n) is a Hamming filter function having coefficients determined by the equation ##EQU9## where N=the window order of the Hamming function and N is selected by the user; and h(n) is an ideal low pass filter function having coefficients determined by the equation ##EQU10## where ω c is the cutoff frequency.
Claim 9
Dependent Claim
35 words
A process as claimed in claim 6 in which the cutoff frequency, ω c , is related to the number of data points in the high resolution profile per data point in the control profile.
Claim 10
Dependent Claim
25 words
A process as claimed in claim 6 in which the cutoff frequency is selected according to the equation: ##EQU11## where .increment.ω is the transition band.
References Cited (Backward Citations)
US4707779A
Cited
US4680089A
Cited
US4965736A
Cited
US4903528A
Cited
US4947684A
Cited
US4982334A
Cited
US5121332A
Cited
US5566093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-02 | 2000-12-02 | 2001-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-02 | 2004-12-02 | 2005-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-02 | 2008-12-02 | 2009-06-03 | $7700.00 | Window Closed / Lapsed |