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中文摘要：
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。
英文摘要：
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.
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