基于光纤布拉格光栅的温度应变复合测量系统

发布时间：2018-02-08 13:49

  本文关键词： 光纤布拉格光栅 可调谐法布里-珀罗滤波器 温度 应变　出处：《纳米技术与精密工程》2017年05期 　论文类型：期刊论文

【摘要】：本文基于光纤布拉格光栅(fiber Bragg grating,FBG)传感原理和可调谐滤波器解调技术设计了一套可用于工程中温度和应变监测的复合测量系统.对系统进行模块化设计,可根据应用实际情况配置各个模块,能够实现14通道同步并行测量,每通道最多可负载16支FBG传感器,即最多能实现224个待测点的实时同步测量.针对可调谐滤波器输出波长的非线性漂移问题,提出了可调谐滤波器的自适应驱动算法,波长拟合残差小于1 pm,确保系统的测量精度.系统的温度测量精度小于±0.5℃,稳定性良好.将本文系统应用于混凝土监测领域,测量结果验证了其可行性,可以满足实际工程应用的需要.
[Abstract]:Based on the sensing principle of fiber Bragg gratings and tunable filter demodulation technology, a composite measurement system for temperature and strain monitoring in engineering is designed in this paper. Each module can be configured according to the actual situation of application, and can realize 14 channels synchronous parallel measurement, each channel can load up to 16 FBG sensors, To solve the problem of nonlinear drift of output wavelength of tunable filter, an adaptive driving algorithm for tunable filter is proposed. The residual error of wavelength fitting is less than 1 pm to ensure the measuring accuracy of the system. The temperature measurement accuracy of the system is less than 卤0.5 鈩，

本文编号：1495590