光纤光栅传感器旋转扭转时管道曲率的检测方法  

Detection of Pipeline Curvature with FBG Sensors Twisted

作　　者：刘正[1] 章亚男[1] 沈林勇[1] 钱晋武[1] 

机构地区：[1]上海大学机电工程与自动化学院,上海200072

出　　处：《上海大学学报（自然科学版）》2006年第5期450-456,共7页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(50475182);上海市重大科技攻关资助项目(04dz12011);上海市第二期重点学科资助项目(Y0102)

摘　　要：在非开挖地下管线探测中,利用光纤光栅传感器测得地下管线的等距离离散点曲率信息,通过空间曲线重建方法重建出地下管线的空间位置形状,是一种探索中的新方法.在测量地下管线的离散点曲率时,光纤光栅传感器除了承受弯曲变形外,还会发生扭转的情况.该文提出了一种在光纤光栅传感器基材整体旋转或扭转情况下得到离散点曲率的算法,从而提高重建精度.通过模拟算例验证了曲线重建时算法的效果.In trenchless detection of underground pipelines, a method has been introduced which employs fiber brag grating （FBG） sensors to detect curvature of the pipeline at discrete point and reconstructs the spatial trajectory of the pipeline by means of a newly developed reconstruction ＇algorithm. In measuring the pipeline curvature, the FBG sensor may be twisted due to sustaining bending deformation. This paper proposes a new algorithm for curvature calculation at discrete points, considering both total revolving and partial twisting of the FBG sensors in order to enhance the curve-fitting accuracy. Simulation results verify the effectiveness of the method.

关 键 词：FBG传感器 非开挖技术 地下管线探测 曲线重建 

分 类 号：TP249[自动化与计算机技术—检测技术与自动化装置]