光纤形状传感器封装过程中残余应力的分布式实时监测  

Distributed Real-Time Monitoring of Residual Stress During Packaging Process of Optical Fiber Shape Sensor

作　　者：尹国路 徐州 朱涛[1,2] Yin Guolu;Xu Zhou;Zhu Tao(Key Laboratory of Optoelectronic Technology&Systems,Ministry of Education,Chongqing University,Chongqing 400044,China;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044 [2]煤矿灾害动力学与控制国家重点实验室,重庆大学,重庆400044

出　　处：《光学学报》2022年第16期22-28,共7页Acta Optica Sinica

基　　金：国家自然科学基金(61975022);国家杰出青年科学基金(61825501);重庆市自然科学基金创新研究群体科学基金(cstc2020jcyj-cxttX0005);重庆市英才青年拔尖人才基金(CQYC202005011)。

摘　　要：设计了一种柔性细径光纤束形状传感器及其注胶封装装置,采用光频域反射仪的分布式应变测量技术,实验探究了形状传感器在封装过程中胶水材料及配比对残余应力的产生、积累和分布情况的影响。实验结果表明,胶水交联反应使得光纤产生的残余应变随着固化时间的推移逐渐增大,且形状传感器中3根光纤的残余应变随时间的积累以及沿光纤轴向的空间分布具有一致性。经过约16 h的固化反应后,3根光纤的残余应变达到最大值并稳定保持在80~100με范围内。该研究成果最大限度地减小光纤形状传感器封装过程中的残余应变,为高精度形状测量提供了基础。A flexible fiber bundle shape sensor with a thin diameter and its glue injection packaging device are designed.By the distributed strain measuring technology of an optical frequency-domain reflectometer,we experimentally explore the influence of the glue material and ratio on the generation,accumulation,and distribution of residual stress in the packaging process of the sensor.The experimental results reveal that the cross-linking reaction of glue makes the residual strain gradually increase with the curing time.Moreover,for the three optical fibers in the shape sensor,the accumulation of residual strain with time and the spatial distribution of residual strain along the fiber axle are consistent.After about 16 h curing reaction,the residual strain of the three fibers reaches the maximum and remains stable in the range of 80-100με.The research results minimize the residual strain during the packaging process of the optical fiber shape sensor and lay a foundation for high-precision shape measurement.

关 键 词：光纤光学 光纤形状传感器 光频域反射仪 残余应力监测 

分 类 号：TN29[电子电信—物理电子学]