| Ultrasonic flaw detection using EMD-based signal processing |
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| 作者姓名： | 毛义梅 Que Peiwen |
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| 作者单位： | Institute of Automatic Detection, Shanghai Jiaotong University, Shanghai 200030, P.R. China |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | The precise detection of flaw echoes buried in backscattefing noise caused by material microstructure is a problem of great importance in uhrasonic non-destructive testing （NDT）. In this work, empirical mode decomposition （EMD） is proposed to deal with ultrasonic signal. A time-frequency filtering method based on EMD is designed to suppress noise and enhance flaw signals. Simulated results are presented, showing that the proposed method has an excellent performance even for a very low signal-to-noise ratio （SNR）. The improvement in flaw detection was experimentally verified using stainless steel pipe sample with artificial flaws.
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| 关 键 词： | 超声波探伤 无损检验 时频滤波 EMD 信号处理 |
| 收稿时间： | 2004-12-06 |
Ultrasonic flaw detection using EMD-based signal processing |
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| Mao Yimei,Que Peiwen.Ultrasonic flaw detection using EMD-based signal processing[J].High Technology Letters,2006,12(1):14-17. |
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| Authors: | Mao Yimei Que Peiwen |
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| Abstract: | The precise detection of flaw echoes buried in backscattering noise caused by material microstructure is a problem of great importance in ultrasonic non-destructive testing (NDT). In this work, empirical mode decomposition (EMD) is proposed to deal with ultrasonic signal. A time-frequency filtering method based on EMD is designed to suppress noise and enhance flaw signals. Simulated results are presented,showing that the proposed method has an excellent performance even for a very low signal-to-noise ratio(SNR). The improvement in flaw detection was experimentally verified using stainless steel pipe sample with artificial flaws. |
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| Keywords: | empirical mode decomposition ultrasonic NDT time-frequency filtering |
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