Miao Yu, Yaolu Zhang, Yutong He, Mingyang Sun, Qian Kong, Zhifeng Zheng. Variational Mode Decomposition and Permutation Entropy Method for Denoising of Distributed Optical Fiber Vibration Sensing System[J]. Acta Optica Sinica, 2022, 42(7): 0706005
- Acta Optica Sinica
- Vol. 42, Issue 7, 0706005 (2022)
Fig. 1. Waveform diagram of vibration simulation signal. (a) Time-domain; (b) frequency-domain
Fig. 2. Waveform diagram of EMD modes. (a) Time-domain; (b) frequency-domain
Fig. 3. Results of EMD-CC denoising method. (a) Signal after denoising; (b) error
Fig. 4. Waveform diagram of CEEMD modes. (a) Time-domain; (b) frequency-domain
Fig. 5. Results of CEEMD-CC denoising method. (a) Signal after denoising; (b) error
Fig. 6. Waveform diagram of VMD modes. (a) Time-domain; (b) frequency-domain
Fig. 7. Results of VMD-PE denoising method. (a) Signal after denoising; (b) error
Fig. 8. Experimental device diagram of DVS system
Fig. 9. Denoising result of touching signal. (a) Modes of VMD-PE; (b) detail comparison of three denoising methods
Fig. 10. Denoising results of wheel rolling signal. (a) Modes of VMD-PE; (b) detail comparison of three denoising methods
Fig. 11. Denoising results of rain signal. (a) Modes of VMD-PE; (b) detail comparison of three denoising methods
|
Table 1. Permutation entropy of 8 kinds of signals
|
Table 2. Correlation coefficient between each IMF of EMD and x(t)
|
Table 3. Correlation coefficient between each IMF of CEEMD and x(t)
|
Table 4. Permutation entropy value of IMF1 under different K values
|
Table 5. Indicators of three denoising methods
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Table 6. Denoising results of three kinds of actual vibration signals under three methods
Set citation alerts for the article
Please enter your email address
© Copyright 2018-2021 | Chinese Laser Press. All Rights Reserved 沪ICP备15018463号-20