SYSTEM FOR INSPECTING VEHICLE BODY AND METHOD THEREOF

• US 20160140703A1
• Filed: 06/22/2015
• Published: 05/19/2016
• Est. Priority Date: 11/17/2014
• Status: Abandoned Application

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Beijing Dajia Internet Information Technology Co., Ltd. (Kuaishou Technology)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Kim, Tae Ho
• Application Number:
  US14/745,702
• Publication Number:
  US 20160140703A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06T 2207/30156 Vehicle coating
• CPC Class Codes: G06T 7/001 using an image reference approach
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005
• CPC Class Codes: G07C 5/12 in graphical form
• CPC Class Codes: H04N 23/00 Cameras or camera modules comprising electronic image sensors; Control thereof

Abstract

A system for inspecting a vehicle body includes: an image processing unit photographing at least one pattern image projected onto a surface of the vehicle body, comparing the at least one photographed pattern image to a reference pattern image, and determining whether a defective portion is formed on the vehicle body based on the comparison of the at least one photographed pattern image to the reference pattern image; a moving unit moving the image processing unit in a length direction and a height direction of the vehicle body; and a motion control unit controlling movement of the moving unit.

Claims

1. A system for inspecting a vehicle body, comprising:

an image processing unit photographing at least one pattern image projected onto a surface of the vehicle body, comparing the at least one photographed pattern image to a reference pattern image, and determining whether a defective portion is formed on the vehicle body based on the comparison of the at least one photographed pattern image to the reference pattern image;

a moving unit moving the image processing unit in a length direction and a height direction of the vehicle body; and

a motion control unit controlling movement of the moving unit.

2. The system of claim 1, wherein the image processing unit includes:

a pattern projecting unit projecting pattern images, each having a phase shifted by a predetermined space, onto the surface of the vehicle body in succession;

a camera unit photographing the at least one pattern image of the projected pattern images; and

an image control unit comparing the at least one pattern image photographed by the camera unit to the reference pattern image and determining whether the defective portion is formed on the vehicle body based on the comparison of the at least one pattern image photographed by the camera unit to the reference pattern image.

3. The system of claim 2, wherein the pattern projecting unit includes:

a rotating mirror rotatably provided thereto; and

a plurality of pattern generating units arranged at fixed spaces centered on the rotating mirror for generating the pattern images.

4. The system of claim 3, wherein

the pattern images generated by the plurality of pattern generating units have phases shifted by predetermined spaces from one another, and

the pattern images generated by the plurality of pattern generating units are projected onto the vehicle body as the rotating mirror rotates.

5. The system of claim 1, wherein

the motion control unit provides information about a moving speed and acceleration of the moving unit to the image processing unit, and

the image processing unit photographs the pattern images projected onto the surface of the vehicle body at equal spacing based on the information about the moving speed and acceleration.

6. The system of claim 5, wherein image photographing areas of the pattern images photographed by the image processing unit are overlapped by predetermined spaces in the length direction and the height direction of the vehicle body.

7. The system of claim 1, wherein

the image processing unit measures a position of the vehicle body from a reference hole formed in the vehicle body, and

the motion control unit corrects movement of the moving unit according to the position of the vehicle body measured by the image processing unit.

8. The system of claim 7, wherein the image processing unit compares a predetermined reference position to a measured position of the reference hole and calculates a correction distance of the vehicle body based on the comparison of the predetermined reference position to the measured position of the reference hole.

9. A method for inspecting a vehicle body, comprising:

projecting pattern images onto a surface of the vehicle body;

photographing at least one pattern image of the pattern images projected onto the surface of vehicle body;

comparing the at least one photographed pattern image to a reference pattern image; and

determining whether a defective portion is formed on the vehicle body based on the comparison of the at least one photographed pattern image to the reference pattern image.

10. The method of claim 9, wherein the pattern images are projected onto the surface of the vehicle body in succession, each of the pattern images having phases shifted by predetermined spaces.

11. The method of claim 9, wherein the determining of whether the defective portion is formed on the vehicle body comprises:

comparing a phase and a cycle of the at least one photographed pattern image to a phase and a cycle of the reference pattern image.

12. The method of claim 9, further comprising:

correcting an image photographing position based on a position of the vehicle body determined with reference to a vehicle body stop position.

13. The method of claim 12, wherein the correcting of the image photographing position comprises:

photographing a reference hole formed in the vehicle body,

comparing the photographed reference hole to the reference pattern image;

calculating a correction distance of the vehicle body based on the comparison of the photographed reference hole to the reference pattern image, and

setting an image photographing area of the vehicle body according to the calculated correction distance.

14. The method of claim 9, further comprising

transmitting, to an image processing unit which photographs the vehicle body, information about a moving speed and acceleration of a moving unit which moves the image processing unit.

15. The method of claim 14, wherein the pattern images projected onto the vehicle body are photographed at equal spacing based on the information about the moving speed and acceleration.

16. The method of claim 15, wherein image photographing areas of the photographed pattern images are overlapped by predetermined spaces in a length direction and a height direction of the vehicle body.

17. The method of claim 9, further comprising generating a warning when the defective portion is formed on the vehicle body.