PCBA is the substrate for assembling electronic parts. The manufacturing quality of PCBA directly affects the reliability of electronic products. With the in-depth development of electronic assembly to PCBA hybrid technology with higher density and smaller size, in order to reduce the number of defective circuit boards entering the next process, the demand for automatic optical inspection (AOI) system for PCBA testing is also increasing.
AOI system is an automatic detection system based on the application of machine vision technology. It realizes the defect detection of PCB surface graphics through the technical process of extracting PCB surface graphics through high-definition linear array camera, digital transformation of graphics, logical judgment and matching of feature points and graphics, logical comparison of line shape and contour, and judgment and extraction of defect points.
AOI system has incomparable technical advantages over other detection schemes and traditional detection methods, and has been widely used in PCBA testing. Its high-speed, college and high-precision features are favored by industry users.