边坡安全监测GPS-RTK信号的降噪算法研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (3) : 265-275.

论文

董是1,龙志友1,王建伟1,邵永军2,杨超2,左琛1,马少华3

作者信息 +

Denoising algorithm for GPS-RTK signals in slope safety monitoring

DONG Shi1, LONG Zhiyou1, WANG Jianwei1, SHAO Yongjun2, YANG Chao2, ZUO Chen1, MA Shaohua3

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文章历史 +

摘要

全球定位系统实时动态差分技术（global positioning system-real time kinematic,GPS-RTK）是解决路基边坡安全监测问题的重要手段，但GPS-RTK信号易受到多路径误差和共模误差的影响。基于小波变换（wavelet transform,WT）和主成分分析（principal component analysis,PCA）分别可以有效去除多路径误差和共模误差，提出WT-PCA算法去除信号误差。首先设置仿真信号，通过参数调优进一步提高单一算法的降噪效果。其次提出组合算法WT-PCA改进单一算法的缺陷，并与其他组合算法进行对比分析。最后，对十天高速路基边坡的GPS-RTK监测数据进行实例分析。结果表明：WT-PCA算法的信噪比和均方根误差较于WT-VMD优于66%和50%左右，算法可以有效地消除GPS-RTK信号的多路径误差和共模误差影响。提高边坡位移监测信号处理精度，进一步评估边坡结构形变及安全状态。

Abstract

The global positioning system real-time dynamic differential technology (GPS-RTK) is an important tool to solve the problem of roadbed slope safety monitoring, but the GPS-RTK signal is susceptible to multi-path error and common-mode error. Based on the wavelet transform (WT) and principal component analysis (PCA) can effectively remove multi-path error and common-mode error, respectively, the WT-PCA algorithm is proposed to remove the signal error. Firstly, the simulated signal is set up and the noise reduction effect of a single algorithm is further improved by parameter tuning. Secondly, the combined algorithm WT-PCA is proposed to improve the defects of the single algorithm and compared with other combined algorithms for analysis. Finally, the GPS-RTK monitoring data of the slope of the roadbed of the Shi-Tian highway is analyzed by example. The results show that the signal-to-noise ratio and root mean square error of WT-PCA algorithm are better than WT-VMD by about 66% and 50%, and the algorithm can effectively eliminate the influence of multi-path error and common mode error of GPS-RTK signal. It improves the accuracy of slope displacement monitoring signal processing and further evaluates the structural deformation and safety status of slopes.

导出引用

董是1,龙志友1,王建伟1,邵永军2,杨超2,左琛1,马少华3. 边坡安全监测GPS-RTK信号的降噪算法研究[J]. 振动与冲击, 2024, 43(3): 265-275

DONG Shi1, LONG Zhiyou1, WANG Jianwei1, SHAO Yongjun2, YANG Chao2, ZUO Chen1, MA Shaohua3. Denoising algorithm for GPS-RTK signals in slope safety monitoring[J]. Journal of Vibration and Shock, 2024, 43(3): 265-275

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