摘要
FAST(500 m口径球面射电望远镜)是中国在贵州依托当地特有的卡斯特地貌建造的球面射电望远镜,建成后它将成为全世界最大的射电望远镜。其反射面结构由锁网张拉而成,在其500 m口径的反射面内共有约2 200个锁网节点,节点的准确测量是保证望远镜运行精度的重要因素。反射面测量样机采用的是高精度摄影测量相机与精密转台结合的方式,通过旋转转台上的反射镜对反射面内不同位置的目标点进行对准、测量。在常见的摄影测量算法基础上,研究了反射镜的反射对于摄影测量算法的影响;并给出了理想情况下与存在安装误差的情况下两旋转轴在旋转不同角度时反射镜的反射作用在摄影测量算法中的等效转换矩阵。
FAST （500-meter-aperture spherical radial pression in Guizhou Province of China, which will be the telescope） is a radio telescope being built in a Karst delargest single dish radio telescope in the world. The main structure of the reflector is formed by over 6 000 of cables, with over 2 200 nodes in the 500-meter aperture area. The accurate measurement for the position of the nodes is crucial for the operation of the telescope. The prototype for the measurement of the reflector combines cameras and accurate rotation platforms, they can aim and measure the targets from different direction by rotating the mirror mounted on the platform. In this article, the mirror＇ s influence on traditional photogrammetry algorithm is analyzed, and transformation matrix is given using the data from the rotate platform.
出处
《科学技术与工程》
北大核心
2014年第16期190-194,共5页
Science Technology and Engineering
基金
国家自然科学基金资助(11273001)资助
关键词
摄影测量
反射镜
FAST
坐标转换
photogrammetry mirror FAST coordinate transportation
