Zhu Chengpeng, Shao Xinxing, Liu Cong, He Xiaoyuan
Appl Opt. 2019 Aug 20;58(24):6535-6544. doi: 10.1364/AO.58.006535.
To reduce the uncertainty region of a three-dimensional (3D) position, a four-camera 3D digital image correlation (3D-DIC) system was built by orthogonally arranging two sets of two-camera DIC systems. The theoretical model proposed herein revealed the relationship between 3D coordinates and system parameters and the propagation of the matching error to the position error. Numerical simulation and experiment were conducted to verify the theory. The simulation and experimental results indicated that the 3D position error of the four-camera system was smaller than that of the two-camera DIC system. The present contribution proves the feasibility of using four-camera DIC systems to improve measurement accuracy.
为了减小三维（3D）位置的不确定区域，通过正交排列两组双相机数字图像相关（3D-DIC）系统构建了一个四相机3D数字图像相关系统。本文提出的理论模型揭示了三维坐标与系统参数之间的关系以及匹配误差向位置误差的传播。进行了数值模拟和实验以验证该理论。模拟和实验结果表明，四相机系统的三维位置误差小于双相机DIC系统的三维位置误差。本研究证明了使用四相机DIC系统提高测量精度的可行性。
