全波形反演下分布式光纤声波传感信号低信噪比自适应任务调度

doi:10.13229/j.cnki.jdxbgxb.20240335

Abstract

Abstract:

Distributed fiber optic acoustic sensing signals are affected by environmental noise interference， fiber optic transmission limitations， and multitasking processing requirements in practical applications. To solve this problem， an adaptive task scheduling method based on full waveform inversion is proposed， aiming to improve the signal-to-noise ratio， optimize multi task scheduling processing， and thus enhance the overall performance of the sensing system. Using a full waveform inversion method based on an improved adjoint state source equation， direct full waveform inversion is performed on distributed fiber optic acoustic sensing signals. Using a constructed neural network to learn variable relationships. Based on the variable relationship， provide the remaining number of solutions for each subtask of the selected main task in the current migration stage， update the probability of selecting the migration task， adaptively and dynamically select the migration task， and achieve multi task scheduling. The performance of multi task scheduling was tested on the benchmark test function， and the development trend of fitness and dispersion evaluation results was relatively positive， with fitness exceeding 8 and dispersion below 0.3. It can be seen that this method can effectively handle the problem of low signal-to-noise ratio of sensing signals， improve the quality of multi task scheduling in distributed fiber optic acoustic sensing systems， and have a strong assisting effect on multi task scheduling in systems with low signal-to-noise ratio signals.

Key words: distributed fiber optic acoustic sensing system, low signal-to-noise ratio signal, full waveform inversion, variable relationship learning, dynamic selection of migration tasks, multi task scheduling

CLC Number:

TP391

Le-ting TAN,Hui DENG. Adaptive task scheduling for distributed fiber optic acoustic sensing signals with low signal-to-noise ratio under full waveform inversion[J].Journal of Jilin University(Engineering and Technology Edition), 2025, 55(4): 1412-1418.

Figures/Tables 6

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组件	指标	设定结果
声波传感器	传感距离	20 km
超低噪声掺铒光纤放大器	线宽	3 kHz
	中心波长	1 600 nm
	脉冲宽度	150 ns
	重复频率	20 kHz
	脉冲峰值激光功率	30 dB·m
声光调制器	输入阻抗	50 Ω
声光调制器	移频	80 MHz
平衡光电探测器	波长	1 550 nm
	增益	30 kV/A
	耦合方式	交流
	输出信号带宽	100 MHz
	探测路数	双路
	调制模式	外调制
尾纤	光纤种类	900 μm套管
	长度	（1 000±10） mm
	连接头种类	FC/APC

Adaptive task scheduling for distributed fiber optic acoustic sensing signals with low signal-to-noise ratio under full waveform inversion

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