北斗卫星导航系统桥梁变形监测的影响因素分析

Analysis of Influencing Factors on Bridge Deformation Monitoring of Beidou Satellite Navigation System

基于北斗卫星导航系统的桥梁变形监测,以天津市永和大桥为例,分析星历、解算时间、测站距离、多路径效应等对变形监测效果的影响。结果表明:星历采用多卫星解算时,变形监测精度更高;解算时间越长,变形监测越高;测站距离对变形监测的精度影响较小;多路径效应对变形监测的精度有一定影响,建议通过优化算法来弱化多路径效应。

Based on monitoring of bridge deformation of Beidou satellite navigation system,through the example of Yong-he Bridge in Tianjin,this paper analyzes the influence of ephemeris,solution time,station distance and mul-tipath effect on the deformation monitoring effect through the bridge deformation monitoring based on satellite positioning.The results show that the deformation monitoring accuracy is higher when the ephemeris is solved by multiple satellites.The longer the solution time,the higher the deformation monitoring;the distance of the station has little effect on the accuracy of deformation monitoring.The multipath effect has a certain influence on the accuracy of deformation monitoring.It is recommended to weaken the multipath effect by optimizing the algorithm.