Distributed Fiber Optic Vibration Recognition Based on Fractional Fourier Transform

Xiaohong Kong; Ming Zhang; Hanlin Guan; Ling Jiang; Chuang Guo

doi:10.3788/LOP230789

Laser & Optoelectronics Progress, Volume. 61, Issue 5, 0506003(2024)

Distributed Fiber Optic Vibration Recognition Based on Fractional Fourier Transform

Xiaohong Kong, Ming Zhang^*, Hanlin Guan, Ling Jiang, and Chuang Guo

Author Affiliations

State Grid Jiangsu Electric Power Co., Ltd., Nanjing Power Supply Branch, Nanjing 210000, Jiangsu , China

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Figures & Tables(7)

Fig. 1. DVS system based on φ-OTDR

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Fig. 2. Time domain curves of different vibration events. (a) Hammering; (b) air pick operation; (c) excavator operation; (d) ambient noise

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Fig. 3. Time-frequency rotation characteristics of FrFT^[17]

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Fig. 4. Time-frequency graphs of different vibration events. (a) Hammering; (b) air pick operation; (c) excavator operation; (d) ambient noise

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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 1. Comparison of the recognition results of the three methods in the test set

Class	Event type	P	R	f
Time-domain A=0.978	Ambient noise	0.981	0.994	0.987
	Hammering	0.959	0.976	0.967
	Air pick	0.989	0.992	0.990
	Excavator	0.981	0.947	0.964
STFT A=0.971	Ambient noise	0.980	0.997	0.988
	Hammering	0.944	0.953	0.949
	Air pick	0.997	0.967	0.982
	Excavator	0.960	0.965	0.963
FrFT A=0.985	Ambient noise	0.994	0.991	0.993
	Hammering	0.976	0.982	0.979
	Air pick	0.984	0.995	0.989
	Excavator	0.987	0.971	0.979

Table 2. Comparison of recognition results of the three methods on the generalized test set

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Table 2. Comparison of recognition results of the three methods on the generalized test set

Class	Event type	P	R	f
Time-domain A=0.938	Ambient noise	0.993	1.000	0.996
	Hammering	0.951	0.802	0.870
	Air pick	0.909	0.970	0.938
	Excavator	0.905	0.964	0.934
STFT A=0.929	Ambient noise	0.987	0.980	0.983
	Hammering	0.835	0.966	0.896
	Air pick	0.974	0.809	0.884
	Excavator	0.928	0.982	0.954
FrFT A=0.980	Ambient noise	0.980	0.997	0.988
	Hammering	0.978	0.974	0.976
	Air pick	0.991	0.973	0.982
	Excavator	0.971	0.978	0.975

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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

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Paper Information

Category: Fiber Optics and Optical Communications

Received: Mar. 7, 2023

Accepted: Apr. 28, 2023

Published Online: Feb. 29, 2024

The Author Email: Ming Zhang (guanhl111@163.com)

DOI:10.3788/LOP230789

CSTR:32186.14.LOP230789

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology