基于US-FBG阵列的高空间分辨率温度场测量  

High spatial resolution temperature field measurement based on US-FBG array

作　　者：李凯[1] 辛璟焘[1] 娄小平[1] 董明利[1] 祝连庆[1] 

机构地区：[1]北京信息科技大学光电信息与仪器北京市工程研究中心

出　　处：《电子测量与仪器学报》2018年第3期157-162,共6页Journal of Electronic Measurement and Instrumentation

基　　金：教育部“长江学者和创新团队”发展计划(IRT_16R07);北京市教委2015年度创新能力提升计划项目资助(TJSHG201510772016);北京市优秀人才培养项目(2016000020124G070)

摘　　要：为了实现高空间分辨率温度场测量,通过高掺锗光纤载氢增敏和优化紫外曝光功率等技术,写制了由8个栅区长度为0.5 mm的超短光纤光栅构成的温度传感器阵列,每个超短光纤光栅位置间隔2 mm,波长间隔8 nm。构建了基于波分复用技术的准分布式温度传感网络,将其应用于温度分布场测量,获得了温度场分布信息。温度场分布随位置近似线性变化,温度梯度为1.68℃/mm。实验结果表明,该准分布式超短光纤光栅温度传感阵列可以准确地实现温度场分布的测量,具有高空间测量分辨率的优点。To realize the high spatial resolution measurement of the temperature field,a temperature sensor array composed of eight ultrashort fiber gratings with a gate length of 0. 5 mm was prepared by the hydrogen enrichment of high germanium fiber and optimization of UV exposure power. Every ultra-short FBG has a position interval of 2 mm and wavelength interval of 8 nm. A quasi-distributed temperature sensor network based on wavelength division multiplexing was constructed and applied to the temperature distribution field to obtain the temperature field distribution information. The temperature varies linearly with the position,and the temperature gradient is1. 68℃/mm. The experimental results show that the quasi-distributed ultra-short fiber grating temperature sensing array can accurately measure the temperature field distribution and has the advantage of high spatial measurement resolution.

关 键 词：光纤布拉格光栅 分布式传感 温度场分布 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]