摘要
针对大跨度悬索桥结构复杂,易受外界环境影响而产生复杂振动的问题,设计一个基于调频连续波技术和干涉测量技术的高精度桥梁振动监测雷达。其能够准确检测桥梁的复杂振动,并能对振动的模态进行分析。通过普立大桥的振动监测,实验结果表明,该雷达适用于复杂环境下桥梁振动的监测。其不仅能够准确测量振动的幅度和频率,还能对有车经过和无车经过时桥梁的不同振动状态进行判断和分析;当车辆经过桥梁时,可根据产生大幅度的激绕振动频率的大小获得桥梁上车辆行驶速度。该雷达便携、测量精度高的特点使其具有广阔的应用前景。
A high-precision bridge monitoring radar based on the frequency modulated continuous wave technique and in-terferometry technique is designed to deal with the complex vibration problems caused by complex structure of long-span suspen-sion bridge which is easy to be affected by its external environment.The radar can be used to accurately measure the complex vi-brations of bridges and analyze the bridges′vibration modes.The experimental results of Puli Bridge vibration monitoring show that this radar is applied to bridge vibrations monitoring in complex environment,can be used to not only measure the bridge vi-bration amplitude and frequency,but also judge and analyze the different vibration states of the bridge with a vehicle passing by or without any one,and obtain the driving speed of vehicles on the bridge according to the magnitude of the large-amplitude ex-citation vibration frequency.The characteristics of portability and high measuring accuracy make the radar have a broad applica-tion prospect.
作者
邵泽龙
张祥坤
李迎松
任佳伟
SHAO Zelong;ZHANG Xiangkun;LI Yingsong;REN Jiawei(Key Lab of Microwave Remote Sensing,National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;School of Electronic,Electrical and Communication Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;School of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《现代电子技术》
北大核心
2019年第16期140-143,148,共5页
Modern Electronics Technique
基金
北京市自然科学基金(4182077)
中国博士后科学基金(2017M620918)~~
关键词
悬索桥
桥梁振动监测
监测雷达设计
雷达监测
振动模态分析
实验验证
suspension bridge
bridge vibration monitoring
monitoring radar design
radar monitoring
vibration modeanalysis
experiment verification
