摘要
为了提高FBG柔杆空间形状感知系统的重构精度,提出了一种利用3根FBG阵列、具有温度补偿特性的非正交FBG柔杆检测方法。在分析传感系统的误差组成、产生原因的基础上,建立仿真模型得到了各组成误差分别对系统空间形状重构精度的影响,得出减小安装角度误差是提升精度的关键。利用待标定参数与标定方向与实际检测方向夹角大小相关的原理,给出了一种修正安装角度误差的标定方法。经过实验证明,该方法使得系统形状重构最大相对误差降为0.25%,为高精度的三维形状感知系统提供了可靠的检测方法。
In order to improve the accuracy of FBG three-dimensional shape sensing reconstruction,this paper proposes a temperature compensated detection method based on non-orthogonal curvature,utilized three FBG arrays to constitute sensor networks.Based on analysis of the system error components and the error causes,the influence of each component error on the 3D reconstruction accuracy is obtained with simulation model.The results show that the key issueto reduce the installation angle error can improve the 3D reconstruction accuracy.A new calibration method is proposed due to that the difference between the calibration direction and the installation direction brings the change of the measurement calibration parameters.The experimental results indicate that the proposed method can reduce the maximum error ratio of 3D reconstructed to 0.16%,which provides a reliable detection method for high precision3 D shape sensing system.
作者
娄小平
陈仲卿
庄炜
祝连庆
Lou Xiaoping Chen Zhongqing Zhuang Wei Zhu Lianqing(Beijing Key Laboratory for Optoelectronics Measurement Technology, Beifing Engineering Research Center of Optoelectronic Information and Instruments, Beijing Information Science and Technology University, Beijing 100016, China School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2017年第2期386-393,共8页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(51675053)
教育部"长江学者与创新团队"发展计划(IRT1212)
北京市重大科技计划(Z151100003615010)
北京市教委创新能力提升计划(TJSHG201510772016)项目资助
关键词
光纤光栅
非正交曲率
形状重构
标定误差
标定方法
fiber Bragg grating
non-orthogonal curvature
shape reconstruction
calibration error
calibration method
