中文摘要：

提出了一种利用多孔径重叠扫描拼接技术的圆柱度非接触式测量新方法,可以有效地改进目前现有圆柱度测量方法中所存在的采样点不足、评定结果不统一等问题。该方法首先对圆柱体零件进行多个子孔径（单视角）的面形测量,其次,利用重叠区域面形信息建立相对空间位置关系,并通过坐标变换将各子孔径面形统一于同一坐标系下,从而实现完整面形的拼接测量。根据获得的圆柱体零件面形数据,可以实现零件圆柱度的精确评定。文中给出了基于多孔径重叠扫描拼接技术的光栅投射测量系统,计算机模拟和实验结果验证了拼接测量方法的可行性。

英文摘要：

According to the characteristics of cylindricity error measurement, this paper presents a novel non-contact cylindrictiy error measurement method, which is based on multi-aperture overlap scanning and connection technique. It can effectively solve the problems in the existing cylindricity measurement methods, such as insufficient measurement points and different evaluation results. This method involves three steps as follows： firstly measuring several sub-aperture （i. e. single-view） profiles of the cylindrical part, then, calculating the relative spatial locations and orientations of each sub-aperture profile using the profile information in the overlapped area, and finally, transforming the sub-aperture profiles into a global coordinate system. The cylindrictiy error can be evaluated from the profile data of the cylinder part. This paper presents the scheme of the grating projection measurement system for sub-aperture measurement. Results of computer simulation and experiment test prove the correctness and feasibility of the new method for cylindricity error measurement.