| 基于经验模态分解的超声波管外测压信号去噪 |
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| 引用本文： | 孙凌逸,黄先祥,蔡伟,杨志勇. 基于经验模态分解的超声波管外测压信号去噪[J]. 声学技术, 2011, 0(5): 427-431 |
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| 作者姓名： | 孙凌逸 黄先祥 蔡伟 杨志勇 |
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| 作者单位： | 第二炮兵工程学院兵器发射理论与技术国家重点学科实验室; |
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| 摘 要： | 在超声波管外测压中,回波信号往往受到噪声的干扰,所以在提取信号特征时,需对回波信号进行去噪。提出了一种基于经验模态分解（EMD）的超声波信号去噪方法,首先利用EMD求出信号的本征模态函数（IMF）,然后通过对比分析,利用反映信号主要特征的模态分量对信号进行重构以实现去噪。实验结果表明,该方法能够有效地去除噪声,提高超声回波信号的信噪比。
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| 关 键 词： | 经验模态分解 超声波 管外测压 去噪 |
| 收稿时间： | 2010-10-19 |
| 修稿时间： | 2011-01-18 |
An EMD-based signal de-noising method for ultrasonic pressure measurement outside pipeline |
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| SUN Ling-yi,HUANG Xian-xiang,CAI Wei and YANG Zhi-yong. An EMD-based signal de-noising method for ultrasonic pressure measurement outside pipeline[J]. Technical Acoustics, 2011, 0(5): 427-431 |
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| Authors: | SUN Ling-yi HUANG Xian-xiang CAI Wei YANG Zhi-yong |
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| Affiliation: | SUN Ling-yi,HUANG Xian-xiang,CAI Wei,YANG Zhi-yong(National Key Discipline Laboratory of Armament Launch Theory & Technology,The Second Artillery Engineering College,Xi'an 710025,China) |
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| Abstract: | In ultrasonic pressure measurement outside pipeline,echo signal is disturbed by electronic noise,structure noise and so on.Before analysis,the ultrasonic echo signal should be de-noised to get better results.In this paper,a de-noising method of ultrasonic signal based on empirical mode decomposition(EMD) is proposed.Firstly,the original ultrasonic signal is decomposed into a finite number of intrinsic mode functions(IMF) by EMD,then the modes re-flecting the important features of the signal are combined tog... |
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| Keywords: | empirical mode decomposition ultrasonic pressure measurement outside pipeline de-noising |
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