Multi-unit process spatial synchronization

• US 8,175,739 B2
• Filed: 07/26/2007
• Issued: 05/08/2012
• Est. Priority Date: 07/26/2007
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Floeder, Steven P., Masterman, James A., Skeps, Carl J., Berg, Brandon T.
• Primary Examiner(s): Masinick, Michael D
• Application Number:
  US11/828,369
• Publication Number:
  US 20090028416A1
• Time in Patent Office: 1,748 Days
• Field of Search: 700/122, 700/124
• US Class Current: 700/122
• CPC Class Codes: G01N 21/8851 Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges G01N21/8806 and G01N21/93 - G01N21/95692 take precedence; optical measurement of dimensions G01B11/00; optical scanning G02B26/10; image transformation G06T3/00; computerised image enhancement G06T5/00; image processing per se for flaw detection G06T7/0002
• CPC Class Codes: G01N 21/89 in moving material, e.g. running paper or textiles G01N21/90, G01N21/91, G01N21/94 take precedence

Abstract

A conversion control system is described for spatially synchronizing data gathered from a plurality of operations performed on a web. The conversion control system applies a set of fiducial marks to a web, performs a plurality of operations on the web, generates a first and a second set of digital information for first and second operations, respectively, in accordance with respective first and second coordinate systems using the set of fiducial marks such that the each of the sets of digital information includes position data for respective first and second sets of regions on the web. The conversion control system may then register the position data of the first set of regions and the position data for the second set of regions to produce aggregate data and outputting a conversion control plan.

Claims

1. A method comprising:

applying at least one set of fiducial marks to a web;

performing a first manufacturing operation on the web;

generating a first set of digital information for the first manufacturing operation in accordance with a first coordinate system used by the first manufacturing operation using the at least one set of fiducial marks, wherein the first set of digital information includes position data for a first set of regions on the web;

after performing the first manufacturing operation on the web, performing a second manufacturing operation on the web;

generating a second set of digital information for the second manufacturing operation in accordance with a second coordinate system used by the second manufacturing operation using the at least one set of fiducial marks, wherein the second set of digital information includes position data for a second set of regions on the web;

registering the position data of the first set of regions and the position data for the second set of regions to produce aggregate data; and

outputting a conversion control plan based on the aggregate data.

2. The method of claim 1, wherein generating comprises generating digital information using at least one of an X-Ray, an ultrasound, an ultraviolet (UV) camera, a UV sensor, an infrared (IR) camera, an IR sensor, a machine vision system, a beta gauge, a physical contact sensor, an ultrasound, a spectral gauge, a spectral camera, a capacitance gauge, an interferometric sensor, a haze measure, a three-dimensional (3D) surface profiler, or a digital imaging device.

3. The method of claim 1, wherein generating comprises generating digital information regarding at least one of thickness, weight, tension, opacity, surface roughness, conductivity, UV images, UV readings, IR images, IR readings, optical uniformity, structural uniformity, capacitance, haze, flatness, color, birefringence, polarization, pressure variations, pressure drop, 3D profile, or pressure of the web.

4. The method of claim 1, wherein generating comprises generating digital information for a single point corresponding to a physical location on the web.

5. The method of claim 1, wherein generating comprises generating digital information for an array of points, wherein respective points of the array of points correspond to respective physical locations on the web.

6. The method of claim 1, wherein generating comprises generating digital information from the web corresponding to less than the entire length of the web.

7. The method of claim 1, wherein registering comprises creating a correspondence between the position data for the first set of regions on the web and the position data for the second set of regions on the web regarding a common segment of the web.

8. The method of claim 1, wherein performing the first manufacturing operation on the web and performing the second manufacturing operation on the web comprises performing the first manufacturing operation and performing the second manufacturing operation on a single manufacturing line.

9. The method of claim 8, wherein performing the first manufacturing operation or performing the second manufacturing operation comprises performing a manufacturing operation that manipulates the web so as to require spatial registration of the position data.

10. The method of claim 9, wherein performing the manufacturing operation that manipulates the web so as to require spatial registration of the position data comprises stretching the web in at least one axis.

11. The method of claim 1, wherein performing the first manufacturing operation comprises performing the first manufacturing operation on a first manufacturing line and wherein performing the second manufacturing operation comprises performing the second manufacturing operation on a second manufacturing line different than the first manufacturing line.

12. The method of claim 1, wherein generating digital information comprises generating anomaly information for the web.

13. The method of claim 12, further comprising

processing the digital information from the first manufacturing operation to produce local anomaly data for the first manufacturing operation;

processing the digital information from the second manufacturing operation to produce local anomaly data for the second manufacturing operation; and

registering the local anomaly data for first manufacturing operation and the second manufacturing operation to produce aggregate anomaly information in accordance with the aggregate data.

14. The method of claim 13, further comprising analyzing at least a portion of the aggregate anomaly information to determine which of the anomalies represent actual defects in the web.

15. The method of claim 1, further comprising processing at least one of the first set of digital information or the second set of digital information to produce local defect data directly from the at least one of the first set of digital information or the second set of digital information.

16. The method of claim 1, further comprising applying an additional set of fiducial marks to the web with at least one of the first manufacturing operation or the second manufacturing operation.

17. A system comprising:

a first manufacturing process configured to perform a first manufacturing operation on a web;

a second manufacturing process configured to perform a second manufacturing operation on the web after the first manufacturing process performs the first manufacturing operation on the web;

a first data gathering device positioned within the first manufacturing operation, wherein the first data gathering device is configured to sequentially retrieve digital information from a first portion of the web to provide a first set of digital information;

a second data gathering device positioned within the second manufacturing operation, wherein the second the data gathering device is configured to sequentially retrieve digital information from a second portion of the web to provide a second set of digital information;

a first computer configured to process the first set of digital information to produce local data for the first manufacturing operation and the second set of digital information to produce local data for the second manufacturing operation, wherein the local data for the first manufacturing operation and the local data for the second manufacturing operation includes position data for one or more regions on the web;

a second computer configured to register the position data of the local data for the first manufacturing operation and the position data of the local data for the second manufacturing operation to produce aggregate data; and

a conversion control system configured to analyze at least a portion of the aggregate data and output a conversion control plan based on the analysis.

18. The system of claim 17, wherein the first manufacturing process is located on a first manufacturing line and the second manufacturing process is located on a second manufacturing line.

19. The system of claim 17, wherein at least one of the first data gathering device or the second data gathering device is configured to retrieve digital information corresponding to anomalies of the web.

20. The system of claim 19,

wherein the first computer is configured to produce local anomaly data for the first manufacturing operation and the second manufacturing operation,

wherein the second computer is configured to register the local anomaly data for the first manufacturing operation and the local anomaly data for the second manufacturing operation to produce aggregate anomaly data, and

wherein the conversion control system is configured to analyze the aggregate anomaly data to determine whether any of the anomaly data corresponds to a defect in the web.

21. The system of claim 17, wherein at least one of the first data gathering device or the second data gathering device is configured to retrieve digital information directly corresponding to defects of the web.

22. The system of claim 17, wherein at least one of the first data gathering or the second data gathering device comprises at least one of an X-Ray, an ultrasound, an ultraviolet (UV) camera, a UV sensor, an infrared (IR) camera, an IR sensor, a machine vision system, a beta gauge, a physical contact sensor, an ultrasound, a spectral gauge, a spectral camera, a capacitance gauge, an interferometric sensor, a haze measure, a three-dimensional (3D) surface profiler, or a digital imaging device.

23. A conversion control system comprising:

a database configured to store data defining a set of rules;

an interface configured to receive local data from a first data collecting device associated with a first manufacturing process that performs a first manufacturing operation on a web of material and a second data collecting device associated with a second manufacturing process that performs a second manufacturing operation on the web of material after the first process performs the first manufacturing operation on the web of material, wherein each of the first and second manufacturing processes generates digital information including position data for a set of regions on the web;

a computer configured to register the position data of the local data for the first manufacturing process and the second manufacturing process to produce aggregate data; and

a conversion control engine configured to apply the set of rules to the aggregate data to determine which regions of the web conform to various quality levels for a plurality of products.

24. The conversion control system of claim 23, wherein the conversion control engine applies the rules to determine a value for at least one product selection parameter for each of a plurality of products, wherein the conversion control engine selects one of the products for conversion of the web based on the determined values.