针对大型曲面的三维重建和形变分析技术现状,提出了一种基于双目结构光系统的曲面动态测量方法。在曲面重建过程中系统可自由移动,通过视觉定位方法恢复系统的移动路径。为保证曲面重建的精度,利用全局优化方法将各个位置提取的结构光点云统一在全局坐标系下,有效避免了位姿计算过程中的误差累积,得到了高精度的曲面形貌。将两次测量的全局坐标系位姿进行统一,利用高精度姿态传感器及静态基准点计算两次测量过程中全局坐标系之间的相对位姿。实验结果表明,该方法快速有效,且曲面形变测量相对误差在0.12%以内。

According to the current situation of three-dimensional reconstruction and deformation analysis technology of large-scale surface, a dynamic measurement method of surface based on binocular structured light system is proposed. In the process of surface reconstruction, the system can move freely, and the movement path of the system can be restored through the visual positioning method. In order to ensure the accuracy of the surface reconstruction, a global optimization method is used to unify the structured light point clouds extracted from each position under the global coordinate system, which effectively avoids the accumulation of errors in the pose calculation process and obtains a high-precision surface morphology. The two-position global coordinate system poses are unified, and the high-precision attitude sensor and static reference point are used to calculate the relative pose between the global coordinate systems during the two measurements. Experimental results show that this method is fast and has high precision, and the relative error of deformation measurement is within 0.12%.