基于查找表的车载经纬仪测角误差修正技术  

Technology of Angle Measuring Error Correction Based on LUT for Vehicular Theodolite

作　　者：佟刚[1] 崔明[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,吉林长春130033

出　　处：《计算机测量与控制》2011年第7期1794-1797,共4页Computer Measurement &Control

基　　金：国家863发展计划资助项目(2008AA7034320B)

摘　　要：车载平台的变形对光电经纬仪测角精度将产生一定的影响,使车载经纬仪难以达到高精度测量的目的;为了提高车载经纬仪静态测角精度,提出了基于查找表的静态测角误差事后补偿技术;首先,推导出车载经纬仪的静态测角误差修正模型。然后,利用安放在经纬仪垂直轴上的倾角传感器采集车载平台变形特征值;最后,构建映射函数,建立输入值和输出值之间的查找关系,即高精度的查找表;实验数据分析结果表明:该方法能有效补偿因为车载平台变形而带来的静态测角误差,使方位测角精度提高46″,高低测角精度提高20″;为实现车载经纬仪高精度测量提供了理论依据和技术支持。The deformation of vehicular platform will have a certain influence to the angle measuring precision of photoelectric theodolite,so it is difficult for the theodolite vehicle to measure with high-precision.In order to improve the static angle measuring precision of vehicle theodolite,bring the compensation technology of static angle measuring error after task based on look-up table.First,derive the correction model of static angle measuring error for vehicular theodolite.Then,using inclinometer placed in the vertical axis to collect the deformation characteristics value of vehicular platform.Finally,establish mapping function,build the relationship of search between input values and output values,namely high-precision of look-up table.The experimental data shows that： This method can effectively compensate static angle measuring error by deformation of vehicle platform,make azimuth precision improved 46″ and elevation precision improved 20.″ It provides a theoretical reference and technical support for high-precision measurement of vehicle theodolite.

关 键 词：车载平台 静态测角精度 倾角传感器 查找表 

分 类 号：TH74[机械工程—光学工程]