Fast and High Spatial Resolution Distributed Optical Fiber Sensing Technology and Its Application in Mechanical Deformation and Temperature Monitoring

被引：0
|
作者：
Yin G. [1 ,2 ]
Jiang R. [1 ]
Xu Z. [1 ]
Zhou L. [1 ]
Niu Y. [1 ]
Lü L. [1 ]
Zhu T. [1 ,2 ]
机构：
[1] Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing
[2] State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2022年 / 58卷 / 08期
关键词：
Distributed optical fiber sensing; GPU acceleration; High spatial resolution temperature monitoring; Mechanical deformation; Optical frequency domain reflectometer;
D O I：
10.3901/JME.2022.08.096
中图分类号：
学科分类号：
摘要：
For future intelligent variant aircraft, wing deformation monitoring during flight, precision interventional surgery in minimally invasive surgery, automatic trajectory tracking of continuum robots, turbine blade temperature monitoring, etc., are required to counter electromagnetic interference, high precision, and light-weight distributed sensing technology. Developed a fast, high spatial resolution distributed optical fiber sensor prototype based on the optical frequency domain reflectometer. The prototype uses the heterodyne beat signal of the auxiliary interferometer as an external clock. The auxiliary interferometer uses a 300-meter delay fiber to suppress the nonlinear frequency sweeping effect of the light source, and the polarization diversity receiver is used to eliminate the polarization fading effect in the system. The CPU and GPU computing time costs were compared within a 40-meter sensing distance, and the GPU acceleration algorithm was used to increase the sensing speed of the optical frequency domain reflectometer by 20 times. The temperature of turbine blades is monitored, and the spatial resolution of sensing sampling reaches 0.76 mm, and the temperature measurement accuracy reaches 0.4 ℃. The prototype is used to realize the mechanical deformation monitoring of the two-dimensional flexible panel, and the measurement error is less than 3%. © 2022 Journal of Mechanical Engineering.
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页码：96 / 104
页数：8
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