High-Resolution Real-Time Visual Inspection System for Micro Assembly

Abstract

For precise assembly of miniature parts, the precise inspection for parts’ posture and real-time servo control for assembly greatly depend on the performance of visual inspection system. This paper proposed a high-resolution real-time visual inspection system of micro assembly. The CMOS image sensor and high-speed digital signal processing chip were chosen to design the image acquisition module, image processing module and image display module. High-accuracy display on the common display device was implemented with the video encoding chip and FPGA. The test results showed that the processing speed with preprocessing could reach 3.5 frames per second with 5 mega-pixel resolution, and the display accuracy after threshold processing had little loss. Micro parts assembly experiment and high accuracy Peg-in-Hole assembly experiment are done to test the performance of the proposed visual inspection system. This visual inspection system can be used for high-resolution real-time micro assembly and other real-time visual servo control.