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首页> 外文期刊>Mathematical Problems in Engineering >Warped Wigner-Hough Transform for Defect Reflection Enhancement in Ultrasonic Guided Wave Monitoring
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Warped Wigner-Hough Transform for Defect Reflection Enhancement in Ultrasonic Guided Wave Monitoring

机译：翘曲的Wigner-Hough变换可增强超声导波监测中的缺陷反射

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摘要

To improve the defect detectability of Lamb wave inspection systems, the application of nonlinear signal processing was investigated. The approach is based on a Warped Frequency Transform (WFT) to compensate the dispersive behavior of ultrasonic guided waves, followed by a Wigner-Ville time-frequency analysis and the Hough Transform to further improve localization accuracy. As a result, an automatic detection procedure to locate defect-induced reflections was demonstrated and successfully tested by analyzing numerically simulated Lamb waves propagating in an aluminum plate. The proposed method is suitable for defect detection and can be easily implemented for real-world structural health monitoring applications.
机译：为了提高兰姆波检测系统的缺陷检测能力，研究了非线性信号处理的应用。该方法基于翘曲频率变换（WFT）以补偿超声波导波的色散行为，然后进行Wigner-Ville时频分析和霍夫变换以进一步提高定位精度。结果，通过分析在铝板上传播的数值模拟的兰姆波，展示了一种自动检测程序来定位缺陷引起的反射并成功进行了测试。所提出的方法适用于缺陷检测，并且可以容易地用于现实世界的结构健康监测应用。

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  • 来源
    《Mathematical Problems in Engineering》 |2012年第10期|358128.1-358128.15|共15页
  • 作者

    Luca De Marchi; Emanuele Baravelli; Giampaolo Cera; Nicolo Speciale; Alessandro Marzani;

  • 作者单位

    Department of Electronics, Information and Computer Systems (DEIS), University of Bologna, 40136 Bologna, Italy;

    Department of Electronics, Information and Computer Systems (DEIS), University of Bologna, 40136 Bologna, Italy;

    Department of Electronics, Information and Computer Systems (DEIS), University of Bologna, 40136 Bologna, Italy;

    Department of Electronics, Information and Computer Systems (DEIS), University of Bologna, 40136 Bologna, Italy;

    Department of Civil, Environmental and Materials Engineering (DICAM), University of Bologna, 40136 Bologna, Italy;

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