地基雷达振动变形测量新方法及应用  

New Technique for Vibration Deformation Measurement of the Ground-based Radar and Its Application

作　　者：江剑锋 黄其欢[2] 王一安[2] Angelique Nishyirimbere 郭剑 付磊[1] JIANG Jianfeng;HUANG Qihuan;WANG Yian;ANGELIQUE NISHYIRIMBERE;GUO Jian;FU Lei(Zhejiang Institute of Hydraulics and Estuary,Hangzhou 310020,China;School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China)

机构地区：[1]浙江省水利河口研究院,杭州310020 [2]河海大学地球科学与工程学院,南京211100

出　　处：《噪声与振动控制》2020年第2期236-242,共7页Noise and Vibration Control

基　　金：国家自然科学基金青年基金资助项目(41304025);中央高校基本科研业务费专项资金资助项目(2018B18814);江苏省研究生科研与实践创新计划资助项目。

摘　　要：地基雷达通过观测目标雷达回波信号的相位差,可探测目标亚毫米级的微小形变量,其高达200 Hz动态采样频率可获取监测目标高频率的动态变形信息,是一种先进的非接触式遥测新设备。在分析地基雷达测量原理的基础上,通过设计试验对其亚毫米的测量精度进行验证;利用IBIS-S地基雷达系统,分别对南京大胜关500 kV大跨越输电塔(塔高256.8 m)和“南京眼”斜拉桥的拉索进行振动测量,通过频谱分析,获取输电塔和斜拉索的变形特征和振动频率。试验结果表明,地基雷达系统能够用于高耸建筑物、桥梁以及钢索等目标的动态测量,它提供了一种非接触、高精度、动态的振动变形测量新方法。Ground-based radar can detect sub-millimeter small deformations of the target by observing the phase difference of the radar echoes signal of the target.In virtue of its dynamic sampling frequency up to 200 Hz,the high frequency dynamic deformation information of the target can be acquired.So,this is an advanced new technology of non-contact telemetry.In this study,on the basis of analyzing the principle of the ground-based radar detection,the sub-millimeter measurement accuracy was verified experimentally.Using the IBIS-S ground-based radar system,the vibration deformations of the Nanjing Dashengguan 500 kV large-span transmission tower with the height of 256.8 m and the cables of the“Nanjing Eye”cable-stayed bridge were measured respectively.The deformation characteristics and vibration frequencies of the transmission tower and the stayed cable were obtained through the spectrum analysis.The experimental results show that the groundbased radar system can be used for dynamic measurement of high-rise buildings,bridges,steel cables and so on.It is a new method for non-contact,high-precision and dynamic vibration deformation measuring.

关 键 词：振动与波 地基雷达 振动测量 频率 输电塔 斜拉索 

分 类 号：P225.7[天文地球—大地测量学与测量工程] TB22[天文地球—测绘科学与技术]