摘要
微变监测雷达能够对观测区域进行全天时、全天候、非接触式、大面积、亚毫米级精度的形变位移监测,其监测精度分析是进行形变分析和精确预警的关键科学问题。本文采用便携式全方位微变监测雷达系统进行了精度研究和测试分析,首先推导了便携式全方位微变监测雷达的一维和二维信号模型,并对影响微变监测雷达监测精度的因素进行了分析;其次,设计一维形变监测实验,采用角反射器等强反射体作为观测目标,并将光学棱镜与角反射器刚性连接,通过雷达监测结果与全站仪监测结果的对比,对一维形变监测精度进行分析;最后,以分布式角反射器模拟观测场景,分析微变监测雷达的二维形变监测精度。一维、二维形变监测实验结果表明,监测结果与实际位移一致性较好,设计的参考角反测量均值在0.1 mm之内,且系统形变监测精度可达亚毫米级,能够实现高精度的微变形监测应用。
Micro Deformation Monitoring Radar can monitor the observation area all-day,all-weather,non-contact,large-area,sub-millimeter precision deformation displacement monitoring,and its monitoring accuracy analysis is a key scientific issue for deformation analysis and accurate early warning.In this paper,a portable omni-directional Micro Deformation Monitoring Radar system is used to conduct accuracy research and test analysis.First,the one-dimensional and two-dimensional signal models of the Portable Omni-directional Micro Deformation Monitoring Radar are derived,and the factors affecting the monitoring accuracy of the Micro Deformation Monitoring Radar system are analyzed.Secondly,a one-dimensional deformation monitoring experiment is designed,using a strong reflector,such as a corner reflector,as the observation target,which is connected to the optical prism.The results of the radar monitoring and total station monitoring are compared to analyze the accuracy of one-dimensional deformation.Finally,the observation scene is simulated with a distributed corner reflector to analyze the two-dimensional deformation monitoring accuracy of the Micro Deformation Monitoring Radar.The experimental results of one-dimensional and two-dimensional deformation monitoring show that the monitoring results are consistent with the actual displacement,the designed reference angle inverse measurement average is within 0.1 mm,and the system deformation monitoring accuracy can reach sub-millimeter level,which can achieve high-precision micro-deformation monitoring application.
作者
高志奇
周世峰
刘勇
乞耀龙
谭维贤
黄平平
GAO Zhiqi;ZHOU Shifeng;LIU Yong;QI Yaolong;TAN Weixian;HUANG Pingping(College of Information Engineering,Inner Mongolia University of Technology,Hohhot,Inner Mongolia 010051,China;Inner Mongolia Key Laboratory of Radar Technology and Application,Hohhot,Inner Mongolia 010051,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu,Sichuan 610031,China)
出处
《信号处理》
CSCD
北大核心
2021年第9期1739-1749,共11页
Journal of Signal Processing
基金
国家自然科学基金重点项目(61631011)
内蒙古自治区财政厅创新引导项目(KCBJ2017,KCBJ2018014)
内蒙古自治区科技重大专项、科技计划项目和自然科学基金(2019ZD022,2019GG139,2019GG138,2020ZD18,2019MS04004)
内蒙古工业大学科学研究项目(DC2000001249)
内蒙古自治区高等学校科学技术研究项目(NJZY19072)
国家自然科学基金项目(61761037)。
关键词
微变监测雷达
干涉雷达
形变监测精度
micro deformation monitoring radar
interferometric radar
deformation monitoring accuracy
