基于光纤应变传感器的柔性管道形状重建应用研究  

Application research on shape reconstruction of flexible pipeline based on fiber optic strain sensor

作　　者：李伟 李孝友 钱思宇 刘盛春 陈雪峰 LI Wei;LI Xiao-You;QIAN Si-Yu;LIU Sheng-Chun;CHEN Xue-Feng(Heilongjiang Provincial Key Laboratory of Metamaterials Physics and Device,College of Electronic Engineering,Heilongjiang University,Harbin 150080,China)

机构地区：[1]黑龙江大学电子工程学院黑龙江省超构材料物理与器件重点实验室,哈尔滨150080

出　　处：《黑龙江大学工程学报》2021年第3期141-147,共7页Journal of Engineering of Heilongjiang University

基　　金：黑龙江省省属高校基本科研业务费资助项目(KJCX201930);国家自然科学基金面上项目(11774081)。

摘　　要：柔性管道过度弯曲和大应变是管道使用失效的主要因素,实现柔性管道的形态弯曲可视化监测对管道失效评估非常重要。提出利用弱光纤光栅阵列对柔性管道轴向应变进行监测,经线性拟合得到光栅中心波长变化与弯曲曲率关系,并通过形状重建完成管道弯曲监测。利用基于圆弧模型的曲线重建算法对柔性管道进行了弯曲半径分别为20、17、15 m的二维形状重建。结果表明,利用该算法可以恢复柔性管道的形态,且在3种情况下的重建误差分别为9.16%、1.02%、7.05%,监测数据与柔性管道实际几何形态吻合较好。Excessive bending and large strain of flexible pipeline are the main factors of service failure of pipeline.It is very important to realize the visual monitoring of flexible pipeline shape bending for pipeline failure assessment.Weak fiber grating array is used to monitor the axial strain of flexible pipeline.The relationship between the wavelength change of fiber grating center and bending curvature is obtained by linear fitting,and the pipeline bending monitoring is completed by shape reconstruction.The curve reconstruction algorithm based on arc model is used to reconstruct the two-dimensional shape of flexible pipeline with bending radius of 20,17,15 m.The results show that the two-dimensional shape of the flexible pipeline can be restored by using this algorithm,and the reconstruction errors in three cases are 9.16%,1.02%and 7.05%,respectively.The monitoring data are in good agreement with the actual geometry of the flexible pipeline.

关 键 词：弱光纤光栅 柔性管道 应变监测 曲线重建算法 形状重建 

分 类 号：TN253[电子电信—物理电子学]