Xiaohong Kong, Ming Zhang, Hanlin Guan, Ling Jiang, Chuang Guo. Distributed Fiber Optic Vibration Recognition Based on Fractional Fourier Transform[J]. Laser & Optoelectronics Progress, 2024, 61(5): 0506003
- Laser & Optoelectronics Progress
- Vol. 61, Issue 5, 0506003 (2024)
Fig. 1. DVS system based on φ-OTDR
Fig. 2. Time domain curves of different vibration events. (a) Hammering; (b) air pick operation; (c) excavator operation; (d) ambient noise
![Time-frequency rotation characteristics of FrFT[17]](/Images/icon/loading.gif){kind=icon}
Fig. 3. Time-frequency rotation characteristics of FrFT[17]
Fig. 4. Time-frequency graphs of different vibration events. (a) Hammering; (b) air pick operation; (c) excavator operation; (d) ambient noise
Fig. 5. Residual CNN structure
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Table 1. Comparison of the recognition results of the three methods in the test set
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Table 2. Comparison of recognition results of the three methods on the generalized test set
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