Mobile phone has become a necessity in people's life, the quality of mobile phone screen directly affects its sales. A high-resolution, clear color rendering effect and good quality screen has a higher appeal to consumers. Machine vision detection system solves this problem well. The visual inspection system can accurately judge whether there are defects on the mobile phone screen, and classify and grade the defects detected.
Although the traditional machine vision detection method can meet the requirements of real-time and high efficiency, its feature extraction ability is limited, and the detection effect can not meet the qualified standard of mobile phone screen quality inspection. On this basis, Hongbao Automation Co., Ltd. detects defects through optimized template matching method, improves the recognition degree of defects, and realizes automatic classification and recognition of defects. Combined with the accurate and automatic feature extraction ability of deep convolution neural network, outstanding feature abstraction and expression ability, Hongbao Automation Co., Ltd. has realized the efficient and accurate detection of mobile phone screen defects, Also completed the classification of defects, to avoid the tedious process of separate classification of defects.
Selection of light source for surface defect detection system of mobile phone screen:
The selection of light source needs to consider the matching and cost performance of mobile phone screen and image acquisition equipment. LED lamp has great advantages in both life and light source stability. High power LED array, high brightness, linear distribution, strong focusing line, long service life, more than 6 years, etc., so this system uses LED light source.
Camera selection of mobile phone screen surface defect detection system:
The surface defects of mobile phone screen glass are very fine, and the resolution of ordinary area array camera is difficult to meet the requirements of detection accuracy, so the industrial CCD camera is selected as the mobile phone screen glass surface defect detection system. The main performance parameters of industrial CCD camera black and white linear array camera are shown in the figure below.
Software selection of mobile phone screen glass surface defect detection system:
The software of mobile phone screen glass surface defect detection system selects mvt-sis visual inspection system. Mvt-sis visual inspection system will segment the collected image through image algorithm, and accurately identify the surface defect of mobile phone screen glass according to the difference of gray value between defect image and qualified product image. The software function and interface of mvt-sis visual inspection system can be customized and developed according to user requirements, which improves the accuracy and intelligent level of mobile phone screen glass surface defect detection system.
The visual inspection system will make a comprehensive consideration of various factors, such as mobile phone model, screen material, size and so on, to develop a solution to respond to the defect detection of mobile phone screen.