基于TEQC的高铁沿线GNSS数据质量分析

Quality Analysis of GNSS Data along High-speed Railway Based on TEQC

高铁运行过程中,时速往往超过200 km/h,这需要提供良好的铁路运行环境,否则铁轨变形将会带来重大交通事故,因此对铁轨及其周围环境变化的监测尤为重要。目前GNSS监测以其自动化、实时性、高分辨性等优势在环境监测方面占据重要地位,符合高铁监测的需求。GNSS监测精度会受周围复杂环境的影响,而高铁沿线往往存在这类因素如树木遮挡、建筑物遮挡、水面反射、高压输电线干扰等。本文利用TEQC软件分析在这些环境中RTK测量和静态观测数据的区别,再加装抑径圈装置,分析数据可靠性是否提高。通过实验分析,环境因素的不同会对GNSS监测有很大影响,其中建筑物遮挡影响最为严重。通过加装抑径圈装置,可有效提高GNSS数据质量和数据精度。

In the process of high-speed railway operation, the speed often exceeds 200 km/h, which requires a good railway environment, otherwise rail deformation will lead to major traffic accidents. Therefore, it is particularly important to monitor the changes of railway track and its surrounding environment. At present, GNSS monitoring plays an important role in environmental monitoring with its advantages of automation, real-time and high resolution, which meets the needs of high-speed rail monitoring. The monitoring accuracy of GNSS is affected by the complex environment around it, such as tree shelter, building shelter, water surface reflection and high voltage transmission line interference. This paper uses TEQC software to analyze the difference between RTK measurement and static observation data in the environment. Additionally, the diameter restraining ring device is installed to analyze whether the reliability of data is improved. The experimental analysis shows that the different environmental factors have a great impact on GNSS monitoring, among which the building occlusion is the most serious. The data quality and accuracy of GNSS can be effectively improved by installing diameter restraining ring device.