光纤管道泄漏检测系统PGC解调电路设计及实验测试

摘要

In conventional PGC(Phase Generated Carrier)dulation using analog circuit circuit aging,positioning the phenomenon such as drift,to architecture based on the digital platform of PGC demodulation interferometric fiber optic sensor,using phase scrambler improved the PGC demodulation circuit,and testing the system function module analysis,finally the effect of the PCG demodulation circuit demodulation experiment simulation,simulation results show that the improved circuit of PGC demodulation performance good,after a phase perturbation frequency signal and the correlation coefficient of more than 96%of the signal under test,the harmonic distortion is less than 2%,at the same time phase scrambler can effectively improve the PGC demodulation output is not stable and the distortion.%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。