Method for controlling quality of a fiberglass mat

• US 7,520,188 B2
• Filed: 05/24/2007
• Issued: 04/21/2009
• Est. Priority Date: 05/24/2007
• Status: Expired due to Fees

• Current Assignee: Ocv Intellectual Capital, Llc (Owens Corning)
• Original Assignee: Ocv Intellectual Capital, Llc (Owens Corning)
• Inventors: Calicott, John M., Wise, Donald E. Jr.
• Primary Examiner(s): Rogers; David A.
• Application Number:
  US11/805,614
• Publication Number:
  US 20080289409A1
• Time in Patent Office: 698 Days
• Field of Search: 738/658, 382/11, 382/141, 356/402, 702/81, 702/82, 702/83, 702/84
• US Class Current: 73/865.8
• CPC Class Codes: G01N 21/27 using photo-electric detection G01N21/31 takes precedence; circuits for computing concentration logarithmic circuits G06G7/24; photometric circuits in general G01J
• CPC Class Codes: G01N 33/38 Concrete; ceramics; glass; bricks

Abstract

A method is provided for controlling the quality of a fiberglass mat. The method includes the steps of dyeing a test specimen of the fiberglass mat, scanning the test specimen with an optical detector to collect color data and comparing the color data to a predetermined standard to determine if the fiberglass mat is within the desired product specification.

Claims

1. A method for controlling quality of a fiberglass mat, comprising:

dyeing a test specimen of said fiberglass mat;

scanning said test specimen with an optical detector to collect color data and storing said color data in a memory device; and

using a computing system to compare said color data stored in said memory device to a predetermined standard stored in said memory device to determine if said fiberglass mat is within desired product specification;

said method being characterized by establishing a scale representing different cure levels of said fiberglass mat by scanning samples of fiberglass mat having known levels of cure and determining the ratio of red pixels to the total number of pixels for said known levels of cure.

2. The method of claim 1, including adjusting parameters for processing said fiberglass mat based upon comparison of color data to predetermined standard.

3. The method of claim 1, including comparing said ratio of red pixels to the total number of pixels in said scan image to said scale whereby said scale is used as said predetermined standard.

4. The method of claim 3, including rating the cure level of a test specimen wherein;

Rating #1 corresponds to 0-3% red pixels;

Rating #2 corresponds to 3-7% red pixels;

Rating #3 corresponds to 7-11% red pixels;

Rating #4 corresponds to 11-18% red pixels; and

Rating #5 corresponds to 18-100% red pixels.

5. The method of claim 1 including cutting said test specimen from said fiberglass mat following curing of said fiberglass mat and prior to dyeing.

6. The method of claim 5, including cutting said test specimen across entire width of said fiberglass mat.

7. The method of claim 5, including submerging said test specimen in a red dye bath.

8. The method of claim 7, including rinsing said test specimen with water to remove excess dye.

9. The method of claim 8, including removing water from said test specimen prior to scanning.

10. The method of claim 9, including placing said test specimen on a scanner at a particular, predetermined point.

11. The method of claim 10, including outlining a box on said scanner to indicate said particular, predetermined point at which any test specimen is to be positioned.

12. The method of claim 11, including adjusting parameters for processing said fiberglass mat based upon comparison of color data to predetermined standard.

13. The method of claim 12, including distinguishing red, green and blue pixels in a scan image of said test specimen.

14. A method for controlling quality of a fiberglass mat, comprising:

dyeing a test specimen of said fiberglass mat;

scanning said test specimen with an optical detector to collect color data and storing said color data in a memory device; and

using a computing system to compare said color data stored in said memory device to a predetermined standard stored in said memory device to determine if said fiberglass mat is within desired product specification;

said method being characterized by (a) determining a ratio of red pixels to a total number of pixels in a scan image and using said ratio to determine the level of cure of said test specimen and (b) establishing a scale representing different cure levels of said fiberglass mat by scanning samples of fiberglass mat having known levels of cure and (c) determining the ratio of red pixels to the total number of pixels for said known levels of cure.

15. The method of claim 14, including comparing said ratio of red pixels to the total number of pixels in said scan image to said scale whereby said scale is used as said predetermined standard.

16. A method for controlling quality of a fiberglass mat, compromising:

dyeing a test specimen of said fiberglass mat;

scanning said test specimen with an optical detector to collect color data and storing said color data in a memory device; and

using a computing system to compare said color data stored in said memory device to a predetermined standard stored in said memory device to determine if said fiberglass mat is within desired product specification;

said method being characterized by distinguishing red, green and blue pixels in a scan image of said test specimen.

17. The method of claim 16, including determining ratio of red pixels to the total number of pixels in said scan image and using said ratio to determine level of cure of said test specimen.