| 小波分析和相平面在声发射信号处理中的应用 |
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| 引用本文： | 黄振峰,郝宇宁,毛汉领,伍蒋军. 小波分析和相平面在声发射信号处理中的应用[J]. 声学技术, 2007, 26(3): 506-509 |
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| 作者姓名： | 黄振峰 郝宇宁 毛汉领 伍蒋军 |
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| 作者单位： | 广西大学机械工程学院,南宁,530004 |
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| 基金项目： | 国家自然科学基金;广西自然科学基金 |
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| 摘 要： | 为了精确地获取声发射源信息,必须采取有效手段对声发射信号进行分析。小波分析同时具有时-频局部化的优良特性,用小波自适应地对声发射信号进行多分辨率的分解,在相平面中绘制系数能量图可以同时直观地观察声发射信号的频率、时间、能量等信息。同时,相平面系数能量图也为小波重构声发射信号提供了理论依据,在此基础上重构的声发射信号排除了其它信号的干扰,更能表征声发射源信息,对声发射源的分析有重要的意义。
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| 关 键 词： | 声发射 小波分析 相平面 时频域分析 |
| 文章编号： | 1000-3630（2007）-03-0506-04 |
| 收稿时间： | 2006-10-30 |
| 修稿时间： | 2006-10-302007-03-31 |
Wavelet analysis and phase plane of acoustic emission signal processing |
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| HUANG Zhen-feng,HAO Yu-ning,MAO Han-ling and WU Jiang-jun. Wavelet analysis and phase plane of acoustic emission signal processing[J]. Technical Acoustics, 2007, 26(3): 506-509 |
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| Authors: | HUANG Zhen-feng HAO Yu-ning MAO Han-ling WU Jiang-jun |
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| Affiliation: | College of Mechanical Engineering, Guangxi University, Nanning 530004, China |
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| Abstract: | In order to obtain accurate information of acoustic emission (AE) source, effective means to analysis AE signal must be used. Wavelet analysis provides outstanding detailed characteristics both in time and frequency. Coefficients can be obtained through self-adapting decomposing of AE signals in the wavelet multilevel analysis, The frequency, time, energy and other information of AE signal can be observed directly in the phase plane. Meanwhile, it also provides a theoretical basis for wavelet AE signal reconstruction. Based on this, the reconstructed AE signal excludes interference of other signals and can show AE source information more clearly. This method is useful in AE sources analysis. |
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| Keywords: | AE wavelet analysis phase plane time-frequency domain analysis |
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