激光与光电子学进展, 2019, 56 (10): 100602, 网络出版: 2019-07-04
薄壁圆环分布式光纤测力传感器的性能 下载: 1335次
Performances of Distributed Fiber Optic Strain Sensor with Thin-Walled Ring
光纤光学 光纤布拉格光栅 布里渊光时域分析技术 分布式监测 薄壁圆环 数据处理 fiber optics fiber Bragg grating Brillouin optical time domain analysis distributed monitoring thin-walled ring data processing
摘要
提出了一种基于分布式光纤应变感测的测力方法,开展了基于布拉格光纤光栅技术(FBG)和布里渊散射光时域分析技术(BOTDA)的薄壁圆环加载实验,详细阐述了分布式光纤传感器的原理、数据拟合及误差分析等问题。为了更进一步验证所提方法的可行性,实验中对FBG和BOTDA所获结果进行了对比分析。实验结果表明,通过BOTDA数据计算的作用力更加接近于实际测量值,证明了分布式光纤监测技术满足土工实验数据采集的精确性要求。
Abstract
This study develops a force-measurement method based on distributed optical fiber strain sensing. A thin-walled ring loading test with the fiber Bragg grating (FBG) and Brillouin optical time domain analysis (BOTDA) techniques is performed. The principles of fiber optic sensing, data fitting, and error analysis are also introduced in detail. The results obtained by FBG and BOTDA are compared and analyzed in the experiment to further verify the feasibility of proposed method. The experimental results show that the load value calculated by the BOTDA data is closer to the actual one. Furthermore, the distributed fiber optical monitoring technology has been proven to meet the accuracy requirements of data acquisition in geotechnical tests.
王德洋, 朱鸿鹄, 朱泳, 施斌, 齐贺. 薄壁圆环分布式光纤测力传感器的性能[J]. 激光与光电子学进展, 2019, 56(10): 100602. Deyang Wang, Honghu Zhu, Yong Zhu, Bin Shi, He Qi. Performances of Distributed Fiber Optic Strain Sensor with Thin-Walled Ring[J]. Laser & Optoelectronics Progress, 2019, 56(10): 100602.