光纤管道泄漏检测系统PGC解调电路设计及实验测试  

Mixed Interferometric Distributed Fiber Optic Sensor PGC Demodulation Module Design and Experimental Data Analysis

作　　者：王影[1] 刘麒[1] 

机构地区：[1]吉林化工学院信控学院,吉林吉林132022

出　　处：《电子器件》2016年第5期1161-1165,共5页Chinese Journal of Electron Devices

基　　金：项目来源:基于光纤传感器技术的管道泄漏检测及定位方法研究(吉化院合字2016第82号)

摘　　要：针对传统PGC解调使用模拟电路制作有电路老化、定位飘移等现象,基于数字化平台来架构干涉式光纤传感器PGC解调,采用相位扰频器改进了PGC解调电路,并对各系统功能模块进行测试分析,最后对PGC解调电路的解调效果进行了试验模拟,模拟结果显示,改进后的PGC电路解调性能良好,经过相位扰频的信号与待测信号的相关系数超过96%,谐波的失真度小于2%,同时相位扰频器能够有效改善PGC解调输出不稳定及失真。In conventional PGC（Phase Generated Carrier）dulation using analog circuit circuit aging,positioning thephenomenon such as drift,to architecture based on the digital platform of PGC demodulation interferometric fiberoptic sensor,using phase scrambler improved the PGC demodulation circuit,and testing the system function moduleanalysis,finally the effect of the PCG demodulation circuit demodulation experiment simulation,simulation resultsshow that the improved circuit of PGC demodulation performance good,after a phase perturbation frequency signaland the correlation coefficient of more than 96% of the signal under test,the harmonic distortion is less than 2%,atthe same time phase scrambler can effectively improve the PGC demodulation output is not stable and the distortion.

关 键 词：光纤传感器 干涉式 PGC解调技术 相位扰频器 

分 类 号：X931[环境科学与工程—安全科学]