快速、高空间分辨分布式光纤传感技术及其在机械形变和温度监测中的应用

doi:10.3901/JME.2022.08.096

机械工程学报 ›› 2022, Vol. 58 ›› Issue (8): 96-104.doi: 10.3901/JME.2022.08.096

• 特邀专栏：机械装备的光纤传感检测与应用 • 上一篇下一篇

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快速、高空间分辨分布式光纤传感技术及其在机械形变和温度监测中的应用

尹国路^1,2, 蒋锐¹, 徐州¹, 周雷¹, 牛洋洋¹, 吕雷¹, 朱涛^1,2

1. 重庆大学光电技术及系统教育部重点实验室重庆 400044;
2. 重庆大学煤矿灾害动力学与控制国家重点实验室重庆 400044

收稿日期:2021-01-15 修回日期:2021-12-05 出版日期:2022-04-20 发布日期:2022-06-13
作者简介:尹国路,男,1985年出生,博士,研究员,博士研究生导师。主要研究方向为智能光纤传感技术。E-mail:glyin@cqu.edu.cn
基金资助:
国家自然科学基金(61975022)和中央高校基本科研业务费(2019CDQYGD038)资助项目。

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

YIN Guolu^1,2, JIANG Rui¹, XU Zhou¹, ZHOU Lei¹, NIU Yangyang¹, Lü Lei¹, ZHU Tao^1,2

1. Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing 400044;
2. State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044

Received:2021-01-15 Revised:2021-12-05 Online:2022-04-20 Published:2022-06-13

摘要/Abstract

摘要： 针对未来智能变体飞行器飞行途中机翼形变监测、微创手术中精准介入手术、连续体机器人自动运动轨迹追踪、涡轮叶片温度监测等对抗电磁干扰、精度高、质量轻的分布式传感技术需求，研制了基于光频域反射仪的快速、高空间分辨率分布式光纤传感样机。该样机采用辅助干涉仪的外差拍频信号作为外部时钟，辅助干涉仪选用300 m的延迟光纤，抑制了光源非线性扫频效应，利用偏振分集接收装置消除系统中的偏振衰落效应。在40 m传感距离内对CPU和GPU运算时间成本进行了对比，采用GPU加速算法将光频域反射仪的传感速度提升了20倍。对涡轮叶片温度进行监测，其传感采样空间分辨率达到0.76 mm，温度测量精度达到0.4℃。采用该样机实现了二维柔性面板机械形变监测，测量误差低于3%。

关键词: 分布式光纤传感, 光频域反射仪, 机械形变, 高空间分辨率温度监测, GPU加速

Abstract: 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%.

Key words: distributed optical fiber sensing, optical frequency domain reflectometer, mechanical deformation, high spatial resolution temperature monitoring, GPU acceleration

中图分类号:

TG156

尹国路, 蒋锐, 徐州, 周雷, 牛洋洋, 吕雷, 朱涛. 快速、高空间分辨分布式光纤传感技术及其在机械形变和温度监测中的应用[J]. 机械工程学报, 2022, 58(8): 96-104.

YIN Guolu, JIANG Rui, XU Zhou, ZHOU Lei, NIU Yangyang, LÜ Lei, ZHU Tao. Fast and High Spatial Resolution Distributed Optical Fiber Sensing Technology and Its Application in Mechanical Deformation and Temperature Monitoring[J]. Journal of Mechanical Engineering, 2022, 58(8): 96-104.

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快速、高空间分辨分布式光纤传感技术及其在机械形变和温度监测中的应用

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

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