高速公路护栏立柱导波相位特性分析与试验研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (6) : 223-228.

论文

柳伟续1 唐志峰2 吕福在3 乔印虎1 张春雨1

作者信息 +

Phase characteristic analysis and experimental study on the guidedwave reflected from expressway guardrail posts

LIU Weixu1,TANG Zhifeng2,Lü Fuzai3,QIAO Yinhu1,ZHANG Chunyun1

Author information +

文章历史 +

摘要

为了实现对高速公路立柱端面导波信号的自动识别，进而实现立柱的埋深检测，对立柱端面处导波信号的相位特性进行了分析研究。通过推导计算反射系数得出端面回波信号与激励脉冲信号反相的相位特性。采用基于Gabor字典的匹配追踪算法分别对ABAQUS有限元仿真信号和实测导波信号进行了稀疏分解,通过所得匹配原子的相位参数验证了回波信号的相位特性，其中实测信号为分别用64kHz和128kHz的T(0,1)模态导波对埋地立柱和自由立柱进行检测所得。仿真与实测信号的试验结果与理论分析相吻合，回波信号的相位特性为导波检测中的信号处理技术提供了新的途径和方法。

Abstract

In order to identify automatically the guided wave signal reflected from the end of an expressway guardrail post and further inspect the buried depth of the guardrail post,the phase characteristic of the guided wave at the end of the guardrail post was analyzed and investigated.It is concluded that the echo signal from the end face has the characteristic of reverse-phase with the excitation pulse signal through deducing and calculating the reflection coefficient.The simulation signals obtained by the finite element simulation software of ABAQUS and the measured signals of the guided wave were decomposed sparsely by using a matching pursuit algorithm based on Gabor dictionary respectively,then the phase characteristic of the echo signals were verified by the phase parameters of matching atoms.The measured signals were collected by detecting identify buried and free guardrail posts using T (0,1) mode guided wave with the frequency of 64 kHz and 128 kHz,respectively.The experimental results of the simulated and measured signals are in good agreement with those of the theoretical analysis.The phase characteristic analysis of the echo signal provides a new way to the signal processing in guided wave detections.

导出引用

柳伟续1 唐志峰2 吕福在3 乔印虎1 张春雨1. 高速公路护栏立柱导波相位特性分析与试验研究[J]. 振动与冲击, 2017, 36(6): 223-228

LIU Weixu1,TANG Zhifeng2,Lü Fuzai3,QIAO Yinhu1,ZHANG Chunyun1. Phase characteristic analysis and experimental study on the guidedwave reflected from expressway guardrail posts[J]. Journal of Vibration and Shock, 2017, 36(6): 223-228

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