基于调谐滤波技术的光纤光栅传感解调系统  

Demodulation System for Fiber Bragg Grating Sensors Based on Tunable Filtering Technique

作　　者：陈长勇[1] 乔学光[1] 贾振安[1] 赵大壮[1] 傅海威[1] 郭团[1] 孙安[1] 

机构地区：[1]西安石油大学光纤传感实验室,西安710065

出　　处：《光电子．激光》2004年第7期778-781,共4页Journal of Optoelectronics·Laser

基　　金：国家863计划资助项目(2002AA313150);国家自然科学基金资助项目(69877025);国家教育部科学技术重点项目(02190)

摘　　要：基于光纤光栅调谐技术,提出了动态滤波扫描、时域同步处理的新型波长检测方案。采用执行机构与监测单元相分离的光纤光栅调谐装置,运用同步滤波和处理的方法,并利用微机多通道采集技术实现了低成本、高精度的光纤光栅传感解调系统,测试表明该系统的波长分辨率为3pm,应变测量分辨率为2.55μ,扫描时间小于200ms,波长检测范围可达9.16nm。A novel wavelength detection scheme is developed with the technique of dynamic filtering in scanning mode and of synchronous process in time domain,which is based on a tunable fiber grating.The system adopts a fiber grating tuning apparatus with separate tuning executor and wavelength monitor,applies the method of synchronous filtering and process,and achieve high performance with low cost as a demodulator of fiber grating sensors.It wavelength resolution is 3 pm,the measured strain resolution is 2.55 μ,its measurable range reaches 9.16 nm,and scanning time is less than 200 ms.

关 键 词：动态滤波扫描 时域同步 波长检测 光纤光栅调谐 光纤光栅传感器 

分 类 号：TN253[电子电信—物理电子学] TP212.14[自动化与计算机技术—检测技术与自动化装置]