Visual inspection system and method for automatically detecting white glass surface defects

A detection system and automatic detection technology, applied in measuring devices, material analysis by optical means, instruments, etc., can solve problems such as increased cost, inability to obtain high-quality white glass surface defect images, no imaging, etc., and achieve high speed. high effect required

Pending Publication Date: 2017-07-28
CASI VISION TECH (LUOYANG) CO LTD
View PDF32 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are also some devices that use light reflection structures to image. Because the use of light reflection plates or light reflection mirrors will cause light loss, the imaging of some defects on the white glass of the mobile phone is not clear or not, and high-quality images of surface defects on the white glass cannot be obtained. It also adds unnecessary costs

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Visual inspection system and method for automatically detecting white glass surface defects
  • Visual inspection system and method for automatically detecting white glass surface defects

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, a visual detection system for automatic detection of surface defects of white glass, including four sub-devices such as a light source device, a microscopic vision device, a precision transmission device, and a control host computer. Among them, the light source system includes at least a light source, and may also include a light source controller and a light source attitude calibration device; the microscopic vision system includes at least a camera, a lens, and may also include a visual attitude adjustment device; the precision transmission device includes at least a roller transmission structure, a motor drive Structure; the control host computer can adopt traditional computer, industrial computer, and programmable controller.

[0032] From top to bottom, the camera is connected to the lens and is located directly above the light source. There is a light source box outside the light source. There is a light source gap on the box to allow the camera to c...

Embodiment 2

[0033] Example 2, such as figure 1 As shown, the line camera 1 is used to connect the lens from top to bottom, and it is located directly above the multi-angle light source 3. There is a light source box outside the multi-angle light source 3, and there is a light source slit 4 on the box body to allow the line camera 1 to pass through. The lens collects the image under the light source box body. The bottom of the light source box body is equipped with a roller conveying structure. The gap 4 of the light source is directly facing the gap between the rollers. When the roller 7 is transported to the light source gap 4, it is triggered by the photoelectric sensor 6 to start collecting images. When the white glass sheet passes directly under the light source gap 4, the camera collects images frame by frame. When the entire white glass sheet passes through, all image collection is completed. .

Embodiment 3

[0034] Example 3, such as figure 2The cross-sectional view of the embodiment structure of the multi-angle light source shown, a multi-angle line light source used in a visual inspection system for automatically detecting surface defects of white glass, including a group of LED chips 20 and a group of one or more different curvature radii. The mirror is composed of off-axis mirror units 41-49, wherein a group of LED chips 20 are arranged in the z-axis perpendicular to the paper surface, and the mirror units 41-49 are only 9 off-axis mirrors with different curvature radii. An example of a single unit (one or more off-axis reflectors with different radii of curvature can also be used in practice), one or more off-axis reflectors with different radii of curvature can separate the light emitted by each LED chip 20 Focusing on the focal point 40, the light emitted by a group of LED chips 20 at the same distance from the reflector is focused to each focus to form a line light along ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a visual inspection system for automatically detecting white glass surface defects. The visual inspection system comprises four sub-devices, namely a light source device, a micro-vision device, a precision transmission device and a control upper computer, wherein the light source device at least comprises a light source; the micro-vision system at least comprises a camera and a lens; the precision transmission device at least comprises a carrier roller transfer structure and a motor driving structure; the visual inspection system is characterized in that the camera is connected with the lens from top to bottom; the camera and the lens are positioned at the vertical upper part of the light source; a light source box is arranged outside the light source; a light source gap is formed in the box body for allowing the camera to acquire an image of a white glass sheet passing through the lower side of the light source box body; the carrier roller transfer structure is assembled below the light source box and is used for transferring the white glass sheet; and when the white glass sheet is transferred to a position aligned with the light source gap through the carrier roller, the image acquisition is started, the images are acquired line by line by the camera while passing through the lower side of the light source gap from one side of the white glass sheet, and acquisition of all the images is completed after the whole white glass sheet passes through the gap.

Description

technical field [0001] The application relates to a visual detection system and detection method for automatically detecting surface defects of white glass, belonging to the technical field of defect detection in the field of robot visual measurement and control. Background technique [0002] There are many problems in the white glass surface detection device in the prior art: [0003] The traditional bright field inspection method of white glass cannot meet the requirements in terms of defect detection category or defect detection accuracy. Dark field inspection can achieve a good detection effect on tiny defects that cannot be accurately identified by the naked eye. [0004] A considerable part of the dark field detection device design requires fixtures. The fixtures will interfere with the imaging of white glass and cause scratches on the glass. The use of fixtures will also sacrifice the detection area of ​​the glass, which will seriously affect the image quality; [00...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/958
CPCG01N21/958
Inventor 不公告发明人
Owner CASI VISION TECH (LUOYANG) CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap