中文摘要：

为了提高偏心轴的测量精度,提出采用二次投影法对偏心轴进行检测与分析。分析了二次投影法的测量原理。通过采用光学影像测量机对偏心轴进行二次投影测量,得到偏心轴在相互垂直的两个平面上的投影数据;对投影数据进行处理,得到偏心轴各轴段中心线端点在空间坐标系中的坐标值,从而进一步建立起各个轴段中心线在空间中的真实矢量。根据得到的矢量数据可以提取出对偏心轴结构进行分析所需的各种参数,从而能够对偏心轴的偏心距和同轴度等加工质量进行合理分析。研究表明,采用二次投影法可以大幅度提高偏心轴的测量精度。

英文摘要：

In order to improve the measurement accuracy of eccentric shaft,the eccentric shaft is tested and analyzed by secondary projection method. The measurement principle of the secondary projection method is analyzed. The projection data of the eccentric axes on the two planes perpendicular to each other are obtained by using the optical image measuring machine to perform the secondary projection measurement on the eccentric shaft. The projection data is processed to obtain the coordinate values of the center line end points of the eccentric axis in the spatial coordinate system,so as to further establish the true vector of the center line of each axis segment in space. According to the obtained vector data,the various parameters needed for the analysis of the eccentric shaft structure can be extracted,so that the eccentricity and concentricity of the eccentric shaft can be analyzed reasonably. The results show that the secondary projection method can greatly improve the measurement accuracy of the eccentric shaft.