Yong Chen, Wangyue An, Huanlin Liu, Zhiqiang Liu, Lixin Zhou. Application of Improved Empirical Mode Decomposition Algorithm in Fiber Bragg Grating Perimeter Intrusion Behaviors Classification[J]. Chinese Journal of Lasers, 2019, 46(3): 0304003
- Chinese Journal of Lasers
- Vol. 46, Issue 3, 0304003 (2019)
Fig. 1. Schematic of matching wavelet calculation
Fig. 2. Flow chart of improved EMD algorithm
Fig. 3. Short time average zero-crossing rate distribution of intrusion signal. (a) Intrusion perturbation signal; (b) distribution of short time average zero-crossing rate
Fig. 4. Photo of perimeter security system
Fig. 5. Intrusion signal and short time average zero-crossing rate distribution before zeroing. (a) Intrusion signal; (b) short time average zero-crossing rate
Fig. 6. Intrusion signal and short time average zero-crossing rate distribution after zeroing. (a) Intrusion signal; (b) short time average zero-crossing rate
Fig. 7. Extracted intrusion signals. (a) Climbing; (b) colliding; (c) shearing; (d) nonintrusive; (e) touching
Fig. 8. Identification results of climbing signal. (a) IMF components; (b) frequency domain distribution
Fig. 9. Identification results of shearing signal. (a) IMF components; (b) frequency domain distribution
Fig. 10. Identification results of nonintrusive signal. (a) IMF components; (b) frequency domain distribution
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Table 1. Identification results of five behaviors by three algorithms
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Table 2. Denoising performance of three algorithms
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