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.

The measurement of three-component micro cutting force is perceived as a core requirement for the field of micro machining. However, the existing three-component force sensors cannot meet the requirement because of its excessive range, low accuracy, complex structure, serious coupling and impure extraction of the micro force to be measured. In this paper, a three-component micro force sensor is proposed to measure the three-component micro force simultaneously. The innovative design of combined composition, series connection, coordinate relationship and coil structure make it stand out from the crowd. Mechanical calculation are conducted to solve the stress and strain parameters of designed sensor, which is in turn, be verified by finite element simulation. Finally, the characteristic experiment and uncertainty evaluation of the designed sensor is performed. The results reveal that the relative uncertainty of the three-component force sensor is less than ±0.5‰. Thus, it is thought that the designed sensor can be accurately used in industry.