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

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...

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

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