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| 基于EMD的激光超声信号去噪方法 | |
| 引用本文： | 孙伟峰,彭玉华,许建华.基于EMD的激光超声信号去噪方法[J].山东大学学报(工学版),2008,38(5):121-126. |
| 作者姓名： | 孙伟峰 彭玉华 许建华 |
| 作者单位： | 1. 山东大学信息科学与工程学院,山东,济南,250100 2. 中国电子科技集团公司第41研究所,山东,青岛,266555 |
| 基金项目： | 电子测试技术国家科技重点实验室资助项目(9140C120102060C1201); 山东省科技攻关项目资助项目(2005GG3201117) |
| 摘 要： | 基于连续均方误差的准则,提出了一种基于经验模态分解(EMD)的激光超声信号去噪方法.该方法将经验模态分解得到的固有模态函数(IMF)分为信号分量起主导作用，模态与噪声分量起主导作用模态,利用反映信号主要结构的模态对信号进行部分重建实现去噪.将该方法应用于测试信号与实际激光超声信号的去噪,实验结果表明该方法能够有效地去除噪声,并且不受主观参数的影响,具有自适应的特点. |
| 关 键 词： | 经验模态分解 激光超声信号 信号去噪 |
| 收稿时间： | 2008-05-08 |
A de-noising method for laser ultrasonic signal based on EMD |
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| SUN Wei-feng,PENG Yu-hua,XU Jian-hua.A de-noising method for laser ultrasonic signal based on EMD[J].Journal of Shandong University of Technology,2008,38(5):121-126. | |
| Authors: | SUN Wei-feng PENG Yu-hua XU Jian-hua |
| Affiliation: | 1. School of Information Science and Engineering, Shandong University, Jinan, 250100, China; 2. The 41st Research Institute of China Electronics Technology Group Corporation, Qingdao, 266555, China |
| Abstract: | Based on the criterion of consecutive mean square error,a de-noising method for laser ultrasonic signals based on empirical mode decomposition(EMD) was proposed.This method can divide the intrinsic mode functions(IMFs) derived from EMD into signal dominant modes and noise dominant modes,then the modes reflecting the important structures of a signal were combined together to form partially reconstructed de-noised signal.Simulations were conducted for simulated signals and a real laser ultrasonic signal using... |
| Keywords: | empirical mode decomposition laser ultrasonic signal signal de-noising |
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