摘要
介绍了一种基于Mach-Zehnder和Sagnac混合干涉型分布式光纤传感器的相位产生载波(PGC)全数字化解调系统。针对GD32F103信号算法处理芯片,进行了PGC数字解调系统的设计,对系统性能进行了分析,最后与模拟解调效果进行了性能对比分析。实验待测信号为0~50 kHz,理想情况下管道泄漏点距离法拉第旋转镜距离为8 045 m,实际情况下距离为8 188.7 m,绝对误差为143.7 m,相对误差为1.75%。本数字系统具有良好的稳定性和较高的定位精度。
A kind of phase generated carrier（PGC） digital demodulation system of distributed optical fiber sensor based on hybrid interferometric configuration of Mach-Zehnder and Sagnac is introduced. For the GD32F103 chip of signal processing of algorithm, design PGC digital demodulation system, performance analysis of PGC digital demodulation system is carried out, and comparison with analog demodulation effect and analysis is carried out. The test signal is 0 - 50 kHz in the experiment, in an ideal condition, distance between leak point and Faraday rotation mirror is 8 045 m, actual distance is 8188.7 m, absolute error is 143.7 m, the relative error is 1.75 %. This digital system has good stability and high positioning precision.
出处
《传感器与微系统》
CSCD
2017年第7期116-119,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(51374188)
浙江省自然科学基金资助项目(LR13E040001)
关键词
分布式光纤
模拟解调
相位产生载波数字解调
泄漏点
distributed fiber
analog demodulation
phase generated carrier （PGC） digital demodulation technique
leak point
