Bishop标架螺旋多芯光纤三维位形重构方法研究  

Research on 3D reconstruction method of helical multicore optical fiber based on bishop frame

作　　者：刘金方 周康鹏 赵昊 张兴硕 孙广开[1,2] LIU Jinfang;ZHOU Kangpeng;ZHAO Hao;ZHANG Xingshuo;SUN Guangkai(Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument,Beijing Information Science and Technology University,Beijing 100192,China;Beijing Laboratory of Optical Fiber Sensing and System,Beijing Information Science and Technology University,Beijing 100016,China)

机构地区：[1]北京信息科技大学光电测试技术及仪器教育部重点实验室,北京100192 [2]北京信息科技大学光纤传感与系统北京实验室,北京100016

出　　处：《光学技术》2023年第6期699-703,共5页Optical Technique

基　　金：国家自然科学基金(51705024);北京市自然科学基金(7202017)。

摘　　要：针对多芯光纤三维位型重构问题,提出了一种基于螺旋多芯光纤和Bishop标架的三维位形重构方法。分析了基于螺旋多芯光纤和Bishop标架的三维位形重构算法原理,实验采用了螺旋多芯光纤布拉格光栅(Fiber Bragg gating, FBG)阵列传感,通过光谱漂移计算各个纤芯的应变值,并根据节点截面应变关系模型实现了纤芯曲率和扭转角解算,最后,结合Bishop迭代计算得到光纤整体位形,实现了形状重构。进行了4种形状的重构实验,最大三维重构绝对误差为3.11mm。实验结果表明,基于Bishop-HMCF的形状重构方法能够实现三维位形重构,在柔性机构末端定位和导航上具有重要的研究意义与应用价值。Aiming at the problem of three-dimensional shape reconstruction of multi-core optical fiber,a three-dimensional shape reconstruction method based on helical multi-core optical fiber and Bishop frame is proposed.The principle of 3D position reconstruction method based on HMCF and Bishop frame was analyzed.The Fiber Bragg grating(FBG)array sensing was used to calculate the strain of each fiber core through spectral drift.The core curvature and torsion angle solution were calculated according to the node section strain relationship model.Four shape reconstruction experiments were carried out,and the maximum absolute error of 3D reconstruction was 3.llmm.The experimental results show that the shape reconstruction method based on Bishop-HMCF can realize 3D shape reconstruction,which has important research significance and application value in the end positioning and navigation of flexible mechanism.

关 键 词：Bishop标架 螺旋多芯光纤(HMCF) 光纤布拉格光栅(FBG) 位形重构 

分 类 号：TN253[电子电信—物理电子学] TH74[机械工程—光学工程]