Micro-displacement Measurement of High-Speed Railway Bridge Based on Vector Network Analyzer

2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI) Pub Date : 2021-10-29 DOI:10.1109/ICEMI52946.2021.9679535

Zhuoyan Gao, Yan Jia, Shuyi Liu, Xiangkun Zhang

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引用次数: 2

Abstract

The efficient and accurate monitoring means of high-speed railway bridge is vital important to maintain the safe operation of high-speed railway. In this paper, a ground-based SFCW interferometry radar system based on vector network analyzer (VNA) is built. The control computer is connected to the VNA through a LAN port to remotely control the VNA to transmit and receive stepped frequency continuous wave (SFCW) signals through two standard gain horn antennas. The experiment is carried out on a 32m simply supported box girder of the Yancheng-Nantong high-speed railway in Nantong City, China. During the experiment, the high-speed railway inspection vehicle was used as the dynamic load and accelerated step by step from 300km/h to 385km/h. The radar system accurately measured the dynamic deflection of the bridge at different speeds and calculated dynamic factor through signal processing. The results show that the simulation results are consistent with the measured results which proves the accuracy and effectiveness of ground-based SFCW interferometry radar in the application of monitoring high-speed railway bridge.

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基于矢量网络分析仪的高速铁路桥梁微位移测量

高效、准确的高速铁路桥梁监测手段对维护高速铁路的安全运行至关重要。本文建立了一种基于矢量网络分析仪(VNA)的陆基SFCW干涉雷达系统。控制计算机通过LAN口与VNA连接，远程控制VNA通过两个标准增益喇叭天线发送和接收步进频率连续波(SFCW)信号。试验在中国南通市盐城-南通高速铁路的32m简支箱梁上进行。实验过程中，以高速铁路巡检车为动载，由300km/h逐步加速至385km/h。雷达系统对桥梁在不同速度下的动态挠度进行了精确测量，并通过信号处理计算出动力系数。结果表明，仿真结果与实测结果吻合较好，证明了地面SFCW干涉雷达在高速铁路桥梁监测应用中的准确性和有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)

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