大型射电望远镜背架精密安装技术  

Precision setting of a large radio telescope back structure

作　　者：李干[1,2] 李宗春[1] 高德军 邓勇[1] 

机构地区：[1]信息工程大学测绘学院 [2]72946部队 [3]61365部队

出　　处：《测绘工程》2012年第4期65-69,共5页Engineering of Surveying and Mapping

摘　　要：对65m射电望远镜的背架安装做了尝试,取得较满意的结果。针对天线背架尺寸大、质量重、焊接变形大、几何精度要求高等特性,采用全站仪工业测量系统实现背架的快速、无接触、高精度定位测量,点位测量精度优于1mm;采用独特的施工工艺和焊接技术,最大限度控制焊接变形,最终点位偏差优于1.5cm。提出基于设计坐标系建立安装测量控制网,指导背架拼装;引入经纬仪交汇测量系统测定全站仪加常数。实际结果表明,该技术观测方案先进,数据处理思路正确,施工工艺合理,是大型天线背架安装的一种精密、可靠、有效的方法。An experiment on precision setting measurement of the 965 meter radio telescope back structure is conducted and the result is satisfactory. Aiming at the large size,weight,welding deformation and high geometric precision of back structure, using the total station industrial measurement system,the measure- ment is rapid, non-contact and high precision,and the point deviation reached 1.0 mm. Using unique con- struction technology and welding technology to control the welding deformation, the final point deviation is better than 1.5 cm. Control network is established based on design coordinate system to guide back structure installation; the total station instrument additive constant are determined by the TIMS（Theodo- lite Industrial Measuring System）. It is a useful and effective method to detect large antenna back struc- tures due to the actual results.

关 键 词：65m射电望远镜 天线背架 工装 全站仪 坐标转换 焊接变形 

分 类 号：TN820[电子电信—信息与通信工程]