Industrial viewing station for inspection of defects

• US 5,841,530 A
• Filed: 09/24/1997
• Issued: 11/24/1998
• Est. Priority Date: 12/29/1995
• Status: Expired due to Fees

• Current Assignee: Orfield Laboratories Incorporated
• Original Assignee: Orfield Laboratories Incorporated
• Inventors: Orfield, Steven J., Hewitt, Frederick G.
• Primary Examiner(s): Font, Frank G.
• Assistant Examiner(s): MERLINO, AMANDA H
• Application Number:
  US08/936,638
• Time in Patent Office: 426 Days
• Field of Search: 356/237, 356/239
• US Class Current: 356/237.1
• CPC Class Codes: G01N 21/8803 Visual inspection measuring projectors G01B9/08
• CPC Class Codes: G01N 21/8806 Specially adapted optical and illumination features

Abstract

A method of establishing a lighting system and viewing environment for conduct of visual task is provided. The method generally includes steps of providing a visual performance lab, conducting a visual performance study, and constructing an industrial viewing station based upon the results of the visual performance study. The invention also concerns provision of a preferred visual performance lab and development of preferred industrial viewing stations.

Claims

1. An industrial viewing station for inspection of defects in a vehicle surface to be examined;

said industrial viewing station comprising;

a) a visual surround defining an interior sized to receive at least a portion of the vehicle;

i) said visual surround covering the interior in order to selectively control entry of outside light into the interior and to selectively control internal luminance;

b) a lighting arrangement having;

a first selected lighting condition and a second selected lighting condition;

i) said first selected lighting condition comprising directional lighting selectively oriented to direct light at the surface to be examined;

ii) said second selected lighting condition comprising surround illuminating light selectively oriented to illuminate the visual surround; and

c) a control system for selectively activating said first selected lighting condition and said second selected lighting condition.

2. An arrangement according to claim 1 further comprising:

a) a pattern system constructed and arranged for viewing a selected pattern reflected by the surface to be viewed.

3. An arrangement according to claim 1 wherein the control system automatically configures said lighting conditions according to vehicle finish characteristics.

4. An arrangement according to claim 1 wherein:

a) said first selected lighting condition comprising lighting selected in accordance with a first viewer'"'"'s viewing preferences and visual performance; and

b) said second selected lighting condition comprising lighting selected in accordance with a second viewer'"'"'s viewing preferences and visual performance.

5. An arrangement according to claim 1 wherein:

a) said first selected lighting condition is configured for viewing a surface of a first color;

i) said first selected lighting condition including surround illuminating light of a first low level; and

b) said second selected lighting condition is configured for viewing a surface of a second color lighter than said first color;

i) said second selected lighting condition including surround illuminating light of a second high level, higher than said first low level.

6. An arrangement according to claim 1 wherein:

a) said first and said second selected lighting conditions comprising at least one lighting source selected from the group consisting of;

i) point source lighting selectively orientable generally perpendicular to the surface to be examined;

ii) linear source lighting selectively orientable generally vertically; and

iii) area source lighting selectively orientable to provide generally uniform luminance of an area in which the vehicle is positioned for examination.

7. An arrangement according to claim 6 wherein:

a) said point source lighting comprises at least one light source selected from the group consisting of;

i) incandescent lighting;

ii) quartz-halogen lighting;

iii) high intensity discharge lighting;

iv) fluorescent lighting;

v) sulfur lighting;

vi) low voltage lighting; and

vii) fiber optic lighting.

8. An arrangement according to claim 6 wherein:

a) said linear source lighting comprises at least one light source selected from the group consisting of;

i) high intensity discharge;

ii) fluorescent lighting;

iii) neon lighting;

iv) fiberoptic lighting; and

v) tubular lighting.

9. An arrangement according to claim 6 wherein:

a) said area source lighting comprises at least one light source selected from the group consisting of;

i) a luminous panel;

ii) a reflected panel;

iii) a back lit panel;

iv) a projection system; and

v) a flat screen.

10. An arrangement according to claim 1 wherein:

a) the inspection is made by a human being.

11. An arrangement according to claim 1 wherein:

a) the inspection is made by a machine vision system.

12. An arrangement according to claim 1 wherein:

a) objective visibility measurements are measured by a machine vision system;

b) said machine vision system comprising;

i) a video camera connected to a computer system, said computer system being programmed with scene imaging capture and calculation software, said computer system having a defect database containing visibility measurements representative of samples having defects and no defects; and

c) said machine vision system compares the detected visibility measurements to the defect database to determine if the objective visibility measurements contain a defect.

13. An inspection lighting system for inspection of defects in a vehicle surface to be examined;

said inspection lighting system comprising;

a) a visual background against which the surface to be examined is selectively examined;

b) a lighting arrangement having;

a first selected lighting condition; and

, a second selected lighting condition;

c) said first and second selected lighting conditions comprising;

i) point source lighting selectively orientable generally perpendicular to the surface to be inspected;

ii) linear source lighting selectively orientable generally vertically;

iii) area source lighting selectively orientable to provide generally uniform luminance of an area in which the vehicle is positioned for examination; and

d) a control system for selectively controlling said first selected lighting condition and said second selected lighting condition.

14. An arrangement according to claim 13 further comprising:

a) a pattern system construed and arranged for viewing a selected pattern reflected by the surface to be viewed.

15. An arrangement according to claim 13 wherein the control system automatically configures said lighting conditions according to vehicle finish characteristics.

16. An arrangement according to claim 13 wherein:

a) said first selected lighting condition comprises lighting selected in accordance with a first viewer'"'"'s viewing preferences and visual performance; and

b) said second selected lighting condition comprises lighting selected in accordance with a second viewer'"'"'s viewing preferences and visual performance.

17. An arrangement according to claim 13 wherein:

a) said point source lighting comprises at least one light source selected from the group consisting of;

i) incandescent lighting;

ii) quartz-halogen lighting;

iii) high intensity discharge lighting;

iv) fluorescent lighting;

v) sulfur lighting;

vi) low voltage lighting; and

vii) fiber optic lighting.

18. An arrangement according to claim 13 wherein:

a) said linear source lighting comprises at least one light source selected from the group consisting of;

i) high intensity discharge lighting;

ii) fluorescent lighting;

iii) neon lighting;

iv) fiberoptic lighting; and

v) tubular lighting.

19. An arrangement according to claim 13 wherein:

a) said area source lighting comprises at least one light source selected from the group consisting of;

i) a luminous panel;

ii) a reflected panel;

iii) a back lit panel;

iv) a projection system; and

v) a flat screen.

20. An arrangement according to claim 13 wherein:

a) said visual background is constructed and arranged to provide a background to at least a side of an automobile.

21. An arrangement according to claim 13 wherein:

a) the inspection lighting system is a moveable system for moving around the vehicle to be examined.