Based on the meridian expansion method, a mathematical model for the analysis of the unfolding motion of the bearing steel ball surface is established, and the trajectory equation of the unfolding motion of the ball surface is deduced, which provides a basis for the follow-up mechanical structure design. Through the mechanism simulation based on Pro/Mechanism, the scanning trajectory curve of the probe can be verified and the surface of the steel ball can be completely covered. According to the comprehensive consideration of the cost and performance of the system, the hardware composition and selection of the system are established. Through C language program, the single chip computer, data acquisition card, stepper motor and so on are automatically controlled, and the high efficiency work of mechanical structure is completed.
