Kuan Peng, Cheng Feng, Senmao Wang, Fan Ai, Hao Li, Deming Liu, Qizhen Sun. Event Discrimination Method for Distributed Optical Fiber Intrusion Sensing System Based on Integrated Time/Frequency Domain Feature Extraction[J]. Acta Optica Sinica, 2019, 39(6): 0628002
- Acta Optica Sinica
- Vol. 39, Issue 6, 0628002 (2019)
Fig. 1. Principle diagram of WLI-DOFVS system
Fig. 2. Flow chart of data processing
Fig. 3. Schematic of Mallat multiresolution decomposition
Fig. 4. Signals before and after denoising by wavelet threshold. (a) Original signal; (b) denoised signal
Fig. 5. Signal segmentation results of several typical intrusion events. (a) Footsteps of passerby; (b) bicycle; (c) knocking on fence; (d) cutting of optical cable
Fig. 6. Photograph of sensing fiber laying on fence and ground
Fig. 7. Typical features in time domain. (a) Average fragment interval; (b)fragment length; (c) PAR
Fig. 8. Energy distributions in frequency domain. (a) Footsteps of passerby; (b) bicycle rolling; (c) knocking on the fence; (d) cutting of optical cable
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Table 1. Main parameters of WLI-DOFVS system
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Table 2. Recognition rate of 4 different methods for the 1st training set%
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Table 3. Recognition rate of 4 different methods for the 2nd training set%
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Table 4. Recognition rate of 4 different methods for the 3rd training set%
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Table 5. Recognition rate of 4 different methods for the 4th training set%
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Table 6. Recognition rate of 4 different methods for the testing set%
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Table 7. Mean and variance of recognition rate of 4 different methods for the 5 groups of data
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