| 基于经验模态分解的激光干涉信号处理 |
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| 引用本文： | 蒲亮,叶玉堂,吴云峰,王昱琳,刘莉.基于经验模态分解的激光干涉信号处理[J].激光技术,2011,35(3):299-301,311. |
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| 作者姓名： | 蒲亮 叶玉堂 吴云峰 王昱琳 刘莉 |
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| 作者单位： | 1.电子科技大学 光电信息学院 现代光电测控及仪器实验室, 成都 610054 |
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| 摘 要： | 为了去除激光干涉测速系统提取的小波脊的大量高频噪声,提高系统测量精度,采用一种基于经验模态分解的小波脊优化的方法,对高频噪声强度进行了很好的抑制,测量误差为原来未优化误差的42.3%,较大幅度提高了激光干涉测速系统的测量精度.结果表明,该方法对经过时频分析的信号去噪有重要的实用价值.
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| 关 键 词： | 傅里叶光学与光信号处理 小波脊优化 经验模态分解 全光纤位移干涉系统 连续小波变换 |
| 收稿时间： | 2010-07-21 |
Laser interferometer signal processing based On empirical mode decomposition |
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| PU Liang,YE Yu-tang,WU Yun-feng,WANG Yu-lin,LIU Li.Laser interferometer signal processing based On empirical mode decomposition[J].Laser Technology,2011,35(3):299-301,311. |
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| Authors: | PU Liang YE Yu-tang WU Yun-feng WANG Yu-lin LIU Li |
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| Abstract: | In order to suppress the high-frequency noise contained in the wavelet ridge obtained from the laser interference velocity measurement system and improve the system accuracy, a method based on empirical mode decomposition was proposed . Theoretical analysis and experimental results show that this method can significantly suppress the high-frequency noise. The measurement error is 42.3% of the original one before optimization. This method improves the system accuracy of the all-fiber displacement interferometer system for any reflector and it is applicable in signal denoising in time-frequency analysis. |
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