三线阵CCD立体测绘相机结构实现技术  

Realizable technology of light-machine structure for three-line array CCD tridimensional mapping camera

作　　者：苗健宇[1] 张立平[1] 田铁印[1] 吴国栋[1] 翟岩[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《仪器仪表学报》2011年第10期2183-2189,共7页Chinese Journal of Scientific Instrument

基　　金：国家863计划(2008AA121803)资助项目

摘　　要：分析了三线阵CCD立体测绘相机工作原理,设计了一种可工程化实施的测绘相机光机结构,此结构由3台相机互成角度装入测绘基座构成。单相机采用像方远心亚对称光学系统,由单镜组装入薄壁壳体的镜头、基于凸轮导向结构的调焦机构、基准镜和成像电器盒构成。测绘基座为测绘相机的高稳定支撑结构,采用7个筒单元、3个板单元与底座交错形成有机一体的结构形式。星敏支架为星敏感器的安装结构,采用3个筒单元和一个圆锥单元相贯而成一体的结构形式。运用PATRAN/NAS-TRAN软件对测绘相机进行工程分析表明,测绘相机组合体的强度和刚度好,满足航天光学遥感器的要求。振动试验结果表明,测绘相机一阶固有频率大于100 Hz,不会与整星产生共振;通过各种环境试验后,相机间基准镜坐标系变化小于4",测绘相机测量坐标系变化小于5"。通过在轨运行表明,测绘相机结构稳定,满足测绘精度要求。Through analyzing the principle of three-line-array CCD mapping camera,a kind of engineering implemented light-machine structure is designed,which consists of three cameras with space intersection angles.Every single camera adopts a telecentric and sub-symmetrical optical system,which is composed of lens units assembled to the thin shell,focusing mechanism based on a cam oriented frame work,fiducial mirror and imaging electrical equipment.The mapping pedestal is a steady support structure for the mapping camera system and has seven canister units and three plank units.The star sensors are installed on a bracket,which has three canister units and one taper unit.The mapping camera system is analyzed using finite element method,and simulation results show that the structural strength and dynamic stiffness of the system can meet the requirement of space remote camera well.Vibration test shows that the fundamental frequency of the system is higher than 100 Hz,which does not bring sympathetic vibration with secondary planet.After environmental tests,the variety of the reference frame of the camera fiducial mirror is less than 4＂,and the variety of the measuring reference frame of the mapping camera is less than 5＂.Orbiting results show that the structure of the mapping camera is stable,and can satisfy the mapping accuracy requirement.

关 键 词：测绘相机 测绘基座 光机结构 坐标系 

分 类 号：P236[天文地球—摄影测量与遥感]