摘要
惯导小车(惯导+全站仪)外业测量中,采用全站仪自由设站方法进行测量时,需手动照准至少3个CPⅢ点后才能进行后续测点的自动照准。为解决手动照准影响测量效率的问题,根据惯导小车测量原理和作业模式,通过分析CPⅢ坐标系、车体前进坐标系、全站仪测量坐标系之间的相对关系,采用两次坐标旋转的方法间接将测点坐标转换到全站仪测量坐标系下,实现全自动照准测量,并通过实际测量数据对此方法进行验证。结果表明,间接转换后的坐标与实际测量坐标差值小于100 mm,可满足全站仪搜索目标棱镜的精度。此方法应用在轨检小车外业测量中可以减少约30 s全站仪设站时间,具有一定的推广价值。
In the measurement with total station of INS trolley,at least three CPⅢ points need to be targeted manually before auto-aiming.In order to improve the efficiency of manual calibration,this paper proposes a method of full-automatic aiming measurement using double coordinate rotation by analyzing the relationship between CPⅢ coordinate system,total station coordinate system and car heading coordinate system.The method is verified by actual measurement data.The results show that the difference between the measured coordinate and the actual coordinate is less than 100 mm which meets the accuracy requirements of total station prism.The application of the method in the field measurement can further improve the efficiency by reducing station setting time 30 seconds which has a certain promotion value.
作者
杨双旗
Yang Shuangqi(China Railway Design Corporation,Tianjin 300251,China)
出处
《铁道勘察》
2020年第6期103-105,122,共4页
Railway Investigation and Surveying
基金
中国铁路设计集团有限公司科技开发计划重点课题(2020KF 340522)。
关键词
轨检小车
全站仪
自动照准
惯导
INS trolley
total station
measure mode
automatic aiming
inertial navigation
