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研究应用于大型射电天文望远镜 FAST(five hun-dred meter aperture spherical radio telescope)预研项目模型检测的大视场、高精度三维实时定位系统。系统采用光电直接位置检测技术 ,利用 3个一维线阵电荷耦合装置 (CCD)传感器的摄像系统 ,检测空间三维标志点的实时运动位置。为满足大视场的要求 ,设计了由复合柱面透镜组成的成像透镜系统。在由一维 CCD传感器的检测信号重建空间三维位置过程中 ,构造了基于 7系数直接线性变换 (DL T)的改进的解算方法。通过镜头对平面点阵的成像测试研究 ,完成了光学镜头的畸变的校准 ,并在上述校准算法基础上完成了整个摄像系统的标定。测试结果表明 ,系统可同时满足大视场和高精度的检测要求 ,各项关键技术指标均优于传统的面阵相机位置检测系统 ,可广泛应用于大视场高精度三维位置检测场合
This paper studies the large-field, high-precision three-dimensional real-time location system applied to the model detection of the FAST (five hun-dred meter aperture spherical radio telescope) pre-research project. The system uses photoelectric direct position detection technology, and uses the imaging system of three one-dimensional linear CCD sensors to detect the real-time motion position of the three-dimensional space mark. In order to meet the requirements of a large field of view, an imaging lens system composed of a compound cylindrical lens is designed. In the process of reconstructing the spatial three-dimensional position from the detection signal of a one-dimensional CCD sensor, an improved solution method based on direct linear transform of 7 coefficients (DL T) is constructed. Through the imaging test of the plane lattice on the lens, the calibration of the distortion of the optical lens is completed, and the calibration of the whole camera system is completed on the basis of the above calibration algorithm. The test results show that the system can meet the requirements of large field of view and high precision detection. The key technical indicators are superior to the traditional position array camera detection system can be widely used in large field of view high-precision three-dimensional position detection