基于OTDM的FBG传感器网络超高速解调系统的设计  

Design on ultra-high speed demodulation system for FBG sensor networks based on OTDM

作　　者：陈娟子[1] 闫连山[1] 曾德兵[1] 吴宗玲[1] 

机构地区：[1]西南交通大学信息光子与通信研究中心,四川成都610031

出　　处：《传感器与微系统》2012年第8期123-125,129,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(60972003);四川省科技支撑计划重大项目(2011GZ0239)

摘　　要：基于光纤Bragg光栅(FBG)和光时分复用(OTDM)的基本原理研究匹配光栅应变传感器网络的高速解调问题。给出了运用FPGA+ARM的匹配光栅应变解调系统设计,实现了多个FBG信道的同时监测。重点在通过寻峰算法寻到峰值的情况下,结合一种复合滤波算法(限幅法+滑动滤波法),极大地抑制了光路和电路中产生的噪声,将峰值功率变化范围由-1.03 dB压缩到-0.31 dB,使得所设计的系统能够在多种环境中应用,具有重要的参考价值。Based on the principle of fiber Bragg grating（ FBG） and optical time-division muhiplexing（OTDM） ,a high-speed demodulation scheme for the matched-grating strain sensor network is proposed. Ultra-high speed demodulation system for multiple FBG senor channels is achieved using FPGA ＋ARM circuit design. Especially, the noise effect brought by either light path or circuit is significantly suppressed using a composite filtering algorithm ,and the variation range of the peak power is reduced from -1.03 dB to -0.31 dB. The designed system can be used in various environments and has important reference value.

关 键 词：光纤BRAGG光栅 光时分复用 解调 复合滤波 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]