Method of Detecting Rotation Process Based on Machine Vision

Machine vision method was adopted to detect the rotation process.A detection-mark was mounted on the drill plate.The rotation process of the drill plat,under different rotational speeds,was shot by a CCD camera.A series of treatments were proposed including the deleting of backdrop, binary treatment,smooth image,the acquisition of feature values,and so on.Time intervals of rotation and angular acceleration were detected and analysed. The research shows that in different ranges of specified rotational speed,the relative error was from 0.67% to 3.4%.The detection has a broad application prospect in the estimate of machines′ rotational stability and dynamic performance.