项目名称: 基于双CCD视觉测量系统的多目标、运动光纤位置检测研究
项目编号: No.11303025
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 周增祥
作者单位: 中国科学技术大学
项目金额: 27万元
中文摘要: 在下一代多目标巡天望远镜设计要求中,普遍追求光纤定位单元在焦面上的小型化、高密度和高精度。本项目主要针对下一代小型化的光纤定位单元难以集成高精度可靠的零位机构,和对光纤定位单元更高的定位精度要求,创新性的采用双CCD像机建立视觉测量系统。在以往LAMOST采用单CCD像机分区拍摄焦面高密度光纤位置的经验基础上,研究高密度、小芯径光纤空间位置的新的测量方法。并在三坐标测量机上搭建高精度双CCD像机的运动测试平台,应用激光跟踪仪精确测出双CCD像机的姿态位置,获取像机的外部参数,提高像机标定精度。并在此基础上研究双CCD像机系统在大尺度、多目标、光纤空间位置测量中的核心问题,探索基于立体视觉的像机自标定技术和光纤空间三维坐标的计算方法,提高焦面上高密度定位单元光纤位置的测量精度。试图建立基于新的高精度测量方法上的闭环系统,满足下一代巡天望远镜对测量光纤单元定位精度的要求,提高望远镜的观测效率。
中文关键词: 双目视觉;光纤位置;光纤定位单元;CCd像机;多目标
英文摘要: In the design parameters of next generation multi-object survey telescope, there are more higher demands for the performance of fiber positioner.The fiber positioner needs to be high density, miniaturization and more accuracy than the LAMOST.The new mini fiber positioner is hard to be integrated reliable and accuracy zero point part,and positioning accuracy for fiber positioner is higher than ever, so we are creatively to use a pair of CCD cameras to build binocular vision measuring system. Research measuring method for the high density、small core diameter fiber position,base on LAMOST experience which use single CCD to capture fiber position on focal plane by partitioned mode. Build a high precision rotation stage with two CCD fixed on CMM,calibrate the attitude of CCD by laser tracker precisely,acquire the outside parameters of camera, promote the accuracy of calibration.Research the essential question of two cameras measuring system on large scale,multi object,fiber coordinates position.Create an algorithm based on binocular vision system for self calibration and fibers 3D coordinates measurement. Reach higher measuring accuracy for fiber position on high density positioner focal plane. Meet the positioning accuracy requirements of fiber positioner and promote the efficiency for next generation survey telesco
英文关键词: Binocular vision;Fiber position;Fiber Positioner;CCD Camera;Multi object