| 基于EMD的声发射管道泄漏检测研究 |
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| 引用本文： | 孙立瑛,李一博,曲志刚,王伟魁.基于EMD的声发射管道泄漏检测研究[J].压电与声光,2008,30(2):239-242. |
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| 作者姓名： | 孙立瑛 李一博 曲志刚 王伟魁 |
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| 作者单位： | 1. 天津城市建设学院,能源与机械工程系,天津,300384;天津大学,精密测试技术及仪器国家重点实验室,天津,300072
2. 天津大学,精密测试技术及仪器国家重点实验室,天津,300072 |
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| 基金项目： | 国家自然科学基金
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天津市教委资助项目 |
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| 摘 要： | 针对管道泄漏声发射检测信号的非平稳特征,该文提出了基于经验模态分解(EMD)的声发射信号分析方法。该信号分析法将管道泄漏产生的复杂声发射信号分解成有限个固有模态信号(IMF),使Hilbert-Huang变换(HHT)的瞬时频率具有了实际物理意义,提高了管道泄漏检测的定位精度。结果表明,HHT法能准确描述声发射波形信号的非线性、非平稳时变特征,是声发射信号时频分析的有效工具。
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| 关 键 词： | 经验模态分解(EMD) 声发射 管道泄漏检测 相关分析 |
| 文章编号： | 1004-2474(2008)02-0239-03 |
| 修稿时间： | 2007年1月9日 |
Study on Acoustic Emission Pipeline Leakage Detection Based on EMD Signal Analysis Method |
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| SUN Li-ying,LI Yi-bo,QU Zhi-gang,WANG Wei-kui.Study on Acoustic Emission Pipeline Leakage Detection Based on EMD Signal Analysis Method[J].Piezoelectrics & Acoustooptics,2008,30(2):239-242. |
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| Authors: | SUN Li-ying LI Yi-bo QU Zhi-gang WANG Wei-kui |
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| Abstract: | A signal analysis method based on EMD(Empirical Mode Decomposition) is proposed aiming at extracting the non-stationary characteristic of the acoustic emission(AE) signal from pipeline leakage.The detected leakage signal can be decomposed into a finite intrinsic mode functions(IMF) by EMD,as a result,it makes the instantaneous frequency of Hilbert-Huang transform have some physical significance and the location accuracy of the leakage detection is increased.It is demonstrated that Hilbert-Huang transform is an effective tool for demonstrating the non-stable and non-linear characteristic of acoustical emission signals. |
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| Keywords: | acoustic emission pipeline leakage detection empirical mode decomposition cross-correlation |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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