高速公路护栏立柱导波相位特性分析与试验研究

发布时间：2018-04-26 14:18

本文选题：超声导波技术 + 相位特性　；参考：《振动与冲击》2017年06期

【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64 k Hz和128 k Hz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 realize the automatic recognition of the guided wave signal at the end of the vertical column of the expressway and the detection of the buried depth of the pillar, the phase characteristics of the guided wave signal at the end of the column are analyzed and studied. The phase characteristics of the end surface echo signal and the excitation pulse signal are obtained by calculating the reflection coefficient. A matching tracing algorithm based on Gabor dictionary is used to sparse decompose the simulated ABAQUS finite element signal and the actual guided wave signal respectively. The phase characteristics of the echo signal are verified by the phase parameters of the matching atom. The measured signals are measured by using 64 kHz and 128 kHz TX _ 0 ~ (1) mode guided waves to detect buried and free columns, respectively. The experimental results of the simulated and measured signals are in agreement with the theoretical analysis. The phase characteristics of the echo signals provide a new approach and method for signal processing in guided wave detection.
【作者单位】：安徽科技学院机械工程学院;浙江大学数字技术与仪器研究所;浙江大学现代制造工程研究所;
【分类号】：U417.12

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