短基线定位在结构物动态变形监测中的应用研究

Study on The Application of Short Baseline Positioning in Dynamic De⁃formation Monitoring of Structures

【目的】验证短基线定位在结构物动态变形监测中的应用效果,为测绘地理信息技术的跨界融合和应用延伸提供科学依据。【方法】通过试验模拟结构物的动态变形情况,采用GNSS接收机观测动态数据,通过TRACK动态定位模块对3个基准站和1个移动站的观测数据进行处理分析。【结果】移动站点位误差X方向为2.2 mm,Y方向为-1.7 mm;基准站最大的点位误差X方向为3.7 mm,Y方向为3.9 mm,移动站和基准站的点位精度误差均满足规范要求。【结论】GNSS短基线测量技术在结构物动态变形监测应用中具有较高的精度,可以更好地解决传统结构物动态变形监测方法速度慢、成本高及自动化程度低等问题。

[Purposes]To verify the application effect of short baseline positioning in dynamic deforma⁃tion monitoring of structures,which provides a scientific basis for the trans-boundary integration and ap⁃plication extension of surveying and mapping geographic information technology.[Methods]Through the experiment,the dynamic deformation of the structure was simulated,the GNSS receiver was used to ob⁃serve the dynamic data,and the TRACK dynamic positioning module was used to process and analyze the observation data of three reference stations and one mobile station.[Findings]The error of moving site location is 2.2mm in X direction and-1.7mm in Y direction.The maximum point position error of the reference station is 3.7mm in the X direction and 3.9mm in the Y direction.The point position accu⁃racy errors of both the mobile station and the reference station meet the requirements of the specification.[Conclusions]GNSS short baseline measurement technology has high precision in the application of structural dynamic deformation monitoring,and can better solve the problems of slow speed,high cost and low degree of automation of traditional structural dynamic deformation monitoring methods.