【摘要】 为了实现对复杂卫星结构多关键区域形变的灵活高精度测量，提出了一种基于多相机三维数字图像相关（3DDIC）的微小形变整体测量方法。建立双目3D-DIC子系统以获得各关键区域的高精度形变场。结合光束平差优化和同名点3D重构方法完成对子系统的位姿外部标定。根据标定参数拼接子系统测量数据，得到全局形变场。在实验室条件下用卫星蜂窝结构的热形变实验测量得到多安装面的整体形变场和测量误差，结果表明，本方法对系统的整体位移测量误差为0.96μm±0.45μm/m，满足高精度、测量范围灵活可变的测量需求，且对重叠视场和离散视场均具有良好的适用性，为空间环境下卫星结构的稳定监测提供了可靠的测量方法。更多还原

【Abstract】 This study proposes a method for the overall measurement of small deformations based on multi-camera threedimensional digital image correlation(3D-DIC) to achieve flexible and high-precision measurement of deformations in multiple key regions of complex satellite structures. A binocular 3D-DIC subsystem is established for obtaining highprecision deformation fields in each key area. Combined with the beam adjustment optimization and the 3D reconstruction method of the same name point, the external calibration of the pose of the subsystem is completed. The measured data of the subsystem is spliced according to the calibration parameters, and the global deformation field is obtained. Under laboratory conditions, the overall deformation field and measurement error of multiple installation surfaces are measured in the thermal deformation experiment of the satellite honeycomb structure. The results show that the overall displacement measurement error of the method for the system is 0. 96 μm±0. 45 μm/m. The method meets the measurement requirements of a high-precision and flexible measurement range. Also, it has good applicability to overlapping and discrete fields of view and provides a reliable measurement method for monitoring the satellite structure’s stability in space.更多还原