Two-dimensional distributed strain sensing with an Archimedean spiral arrangement in optical frequency domain reflectometry

Yamei Guo, Zhenyang Ding, Kun Liu, Junfeng Jiang, Chenhuan Wang, Tiegen Liu
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引用次数: 1

Abstract

We demonstrate a distributed two-dimensional (2D) strain-sensing system in optical frequency domain reflectometry (OFDR) with an Archimedean spiral arrangement of the sensing fiber. The Archimedean spiral describes a simple relationship between the radial radius and polar angle, such that each circle (the polar angle from 0 to 2π) can sense the 2D strain in all directions. The strain between two adjacent circles can also be easily obtained because an Archimedean spiral facilitates sensing of every angle covering the full 2D range. Based on the mathematical relation of Archimedean spirals, we deduce the relationship between the one-dimensional position of the sensing fiber and 2D distribution in polar coordinates. The results of the experiment show that an Archimedean spiral arrangement system can achieve 2D strain sensing with different strain load angles.

光学频域反射法中阿基米德螺旋排列的二维分布应变传感
我们展示了一种分布式二维(2D)应变传感系统,用于光频域反射(OFDR),传感光纤采用阿基米德螺旋排列。阿基米德螺旋描述了径向半径和极角之间的简单关系,这样每个圆(从0到2π的极角)可以在所有方向上感知二维应变。两个相邻圆之间的应变也可以很容易地获得,因为阿基米德螺旋有助于感知覆盖整个二维范围的每个角度。基于阿基米德螺旋的数学关系,推导了传感光纤的一维位置与二维极坐标分布之间的关系。实验结果表明,阿基米德螺旋排列系统可以实现不同应变加载角度下的二维应变传感。
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