Device and method for dynamic detection of mirror surface scratches

Abstract

The invention belongs to the technical field of machine vision defect detection, and more specifically relates to a mirror surface scratch dynamic detection device, and a method. The mirror surface scratch dynamic detection device is an intelligent automatic detection platform which is provided with a camera obscura, a mobile scanning light source, and symmetrically arranged high speed array CCD cameras, is capable of realizing multiple working station switching of lens to be detected, and collecting gray level images of lens to be detected at different positions, different reflective angles,and different high light zone situations rapidly, accurately, and repeatedly. Gassian low-pass filtering algorithm, laplace operator, binaryzation, and Hough transforming image vision algorithm are adopted successively, so that rapid, accurate, and stable extraction of scratches of lens to be detected is realized. The mirror surface scratch dynamic detection device is especially suitable to be used for extraction of mirror surface extremely weak scratches, increasing detection efficiency and detection quality greatly, and reducing cost. The mirror surface scratch dynamic detection device and the method are simple, are capable of satisfying on-line detection production mode, is stable and reliable, and is convenient for popularization and applications.

Description

technical field [0001] The invention belongs to the technical field of machine vision defect detection, and in particular relates to a dynamic detection device and method for mirror surface scratches. Background technique [0002] With the continuous development of the glass industry and the increasing demand, the quality requirements for glass products are also getting higher and higher. Due to the influence of manufacturing process, human factors and other factors, the original glass plate may have defects at any stage of the production process. At this time, glass quality inspection plays a very important role. According to the current standard of glass, the common defects of glass mainly include: air bubbles, tin sticking, scratches, inclusions, etc. [0003] The traditional mirror quality inspection methods are all manual inspection methods, but with the high quality requirements of users and the intensification of market competition, the requirements for mirror qualit...

AI Technical Summary

Problems solved by technology

[0003] The traditional mirror quality inspection methods are all manual inspection methods, but with the high quality requirements of users and the intensification of market competition, the requirements for mirror quality are getting higher and higher. For example, automobile rearview mirrors require that there should be no deformation, blur, or streaks on the mirror surface. , Bubbles, scars, cracks, inclusions and other defects, and there are strict requirements on the flatness of the mirror surface, and even some curvature radii on the edge of the mirror. At this time, the traditional manual inspection method cannot meet the high-quality and high-efficiency production needs.

[0004] Nowadays, in the process of industrialized production of mirrors, surface defects such as scratches are often encountered, and these problems are extremely challenging for manual inspection and machine vision inspection

The difficulty of detecting scratches on the surface of the mirror lies in: irregular shape of scratches, low contrast between depth and light, reflection of light on the surface of the mirror interferes with the detection process and results

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