高精度动态光纤应变传感研究

发布时间：2018-01-25 23:41

  本文关键词： 光纤传感器 动态 光干涉 应变 探测算法　出处：《光子学报》2016年11期 　论文类型：期刊论文

【摘要】：传统的光纤应变传感技术无法在满足高精度和强环境适应性的同时实现稳定的动态应变传感.为了解决该问题,本文将光干涉原理应用于光纤应变传感,设计了一种强环境适应性的基于干涉结构的高精度光纤应变传感系统,基于扫频干涉信号的互相关系数,该系统可以稳定地探测应变.本文还提出一种动态探测算法,该算法弥补了系统只能探测较小应变的缺陷,大大提升了实际应变的探测范围,同时还实现了动态的应变检测;采用三次样条插值算法,提升了小应变探测的精度.理论分析和仿真模拟表明,在加入白噪声的信号信噪比为15dB时,插值后的探测精度是未插值探测精度的2.3倍,插值后本系统探测结果的最大误差只有约9nε.
[Abstract]:Traditional optical fiber strain sensing technology can not achieve stable dynamic strain sensing while satisfying high precision and strong environment adaptability. In order to solve this problem, the principle of optical interference is applied to fiber optic strain sensing. A high precision fiber strain sensing system based on interference structure is designed, which is based on the correlation number of frequency sweep interference signal. This system can detect strain stably. This paper also proposes a dynamic detection algorithm, which makes up for the defect that the system can detect only small strain, and greatly improves the detection range of actual strain. At the same time, dynamic strain detection is realized. The accuracy of small strain detection is improved by using cubic spline interpolation algorithm. Theoretical analysis and simulation show that the signal-to-noise ratio of the signal to noise is 15dB when white noise is added. The detection accuracy of the interpolated system is 2.3 times that of the uninterpolated one, and the maximum error of the system is only about 9n 蔚.
【作者单位】： 安徽师范大学物理与电子信息学院;
【基金】：安徽省科技攻关项目(No.1501041137) 安徽省教育厅自然科学基金项目(No.KJ2015A079) 安徽师范大学博士科研启动基金资助~~
【分类号】：TP212
【正文快照】： 0引言光纤传感具有灵敏度高、响应速度快、终端结构简单、抗电磁干扰强等优点,可以实现折射率[1]、应变[2]、曲率[3]和温度[4-5]等参数的探测,已经被广泛应用在周界安防[6]和建筑健康监测[7]等领域.近几年,光纤应变传感技术吸引了很多研究人员的关注.2009年,Koyamad等利用相干，

本文编号：1464027