Laser interferometer signal processing based on empirical mode decomposition

PU Liang; YE Yu-tang; WU Yun-feng; WANG Yu-lin; LIU Li

doi:10.3969/j.issn.1001-3806.2011.03.003

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.

Laser interferometer signal processing based on empirical mode decomposition

Corresponding author: YE Yu-tang, ytye@uestc.edu.cn;

1. Modern Opto-electronic Measurement and Instrument Laboratory, School of Opto-electronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China

Received Date: 2010-07-21

Accepted Date: 2010-08-06

Available Online: 2011-05-25

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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Reference (18)

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Laser interferometer signal processing based on empirical mode decomposition

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