【作者】 朱鹏；

【导师】 王健；

【作者基本信息】 南京大学 ， 电子与通信工程（专业学位）， 2020， 硕士

【摘要】 我国的南方地区山川丘陵地势比较复杂,一些山体地面下方已经被完全采空,而在这些采空区域通常会建有许多大型建筑与设施,比如铁路、变电站以及蓄水站等。这些建筑是十分不安全的,若是人工定期巡视的成本会很大、周期会很长,所以需要一个科学有效的方法进行监测与预警。目前,通常利用GNSS以及地面参考站系统可以通过卫星接收机实现监测点坐标数据的获取,并以此作为是否发生沉降的依据。本论文阐述了PPP单点定位原理、RTK动态差分定位原理以及基线解算与后处理的基本方法,并分析了误差来源以及如何消除或减弱这些误差。之后着重研究了GAMIT/GLOBK高精度解算算法,最终可以得到时间域与空间域合并的固定解,其精度可以达到毫米级。最后,本论文以GAMIT/GLOBK算法为核心搭建了一个可以用于远程监测处于偏远山区内的大型变电设施设备的沉降坐标数据变化情况的高精度沉降预警监测系统。该系统主要由现场监测端、本地解算服务器端、云端数据转发服务器端以及客户端四个子系统构成。其中现场监测端负责GNSS原始坐标数据的采集;本地解算服务器端负责坐标数据的基线解算及本地存储;云端数据转发服务器端负责精确坐标数据的转发;客户端负责最终数据的分析与展示。本论文搭建的沉降监测系统具有以下特点:1)系统集成一体化程度高;2)数据解算精度高(可以达到毫米级);3)实时传输坐标解算数据;4)解算坐标数据分布存储。更多还原

【Abstract】 In the south of China,the terrain of mountains and hills is complex,and some mountains have been completely mined out under the ground.In these mined out areas,there are usually many large buildings and facilities,such as railways,substations and water storage stations.These buildings are very unsafe,if the cost of regular inspection by hand will be very large,the cycle will be very long,so it needs a scientific and effective method for monitoring and early warning.At present,GNSS and ground reference station system are usually used to obtain the coordinate data of monitoring points through satellite receiver,which can be used as the basis of whether settlement occurs.In this paper,the PPP single point positioning principle,RTK dynamic differential positioning principle and the basic methods of baseline solution and post-processing are described,and the error sources and how to eliminate or weaken these errors are analyzed.After that,we focus on the GAMIT / GLOBK high-precision solution algorithm.Finally,we can get the fixed solution of the combination of time domain and space domain,and its precision can reach millimeter level.Finally,a high-precision settlement early-warning and monitoring system is built based on GAMIT / GLOBK algorithm,which can be used to remotely monitor the settlement coordinate data changes of large-scale substation equipment in remote mountainous areas.The system is mainly composed of four sub-systems: field monitoring,local solution server,cloud data forwarding server and client.The on-site monitoring terminal is responsible for the collection of GNSS original coordinate data;the local solution server is responsible for the baseline solution and local storage of coordinate data;the cloud data forwarding server is responsible for the forwarding of accurate coordinate data;the client is responsible for the analysis and display of final data.The settlement monitoring system built in this paper has the following characteristics: 1)high degree of system integration;2)high accuracy of data solution(up to millimeter level);3)real-time transmission of coordinate solution data;4)distributed storage of solution coordinate data.更多还原