混合干涉型分布式光纤传感器PGC信号解调设计与实验分析

朱俊, 王强, 谷小红, 杨其华

朱俊, 王强, 谷小红, 杨其华. 混合干涉型分布式光纤传感器PGC信号解调设计与实验分析[J]. 应用光学, 2015, 36(4): 660-665. DOI: 10.5768/JAO201536.0408002
引用本文: 朱俊, 王强, 谷小红, 杨其华. 混合干涉型分布式光纤传感器PGC信号解调设计与实验分析[J]. 应用光学, 2015, 36(4): 660-665. DOI: 10.5768/JAO201536.0408002
Zhu Jun, Wang Qiang, Gu Xiao-hong, Yang Qi-hua. Mixed interferometric distributed fiber optic sensor PGC demodulation module design and experimental data analysis[J]. Journal of Applied Optics, 2015, 36(4): 660-665. DOI: 10.5768/JAO201536.0408002
Citation: Zhu Jun, Wang Qiang, Gu Xiao-hong, Yang Qi-hua. Mixed interferometric distributed fiber optic sensor PGC demodulation module design and experimental data analysis[J]. Journal of Applied Optics, 2015, 36(4): 660-665. DOI: 10.5768/JAO201536.0408002

混合干涉型分布式光纤传感器PGC信号解调设计与实验分析

基金项目: 

国家自然科学基金(51374188);浙江省自然科学基金项目(LR13E040001);质检公益性行业科研专项(201310152)

详细信息
    作者简介:

    朱俊(1992-),男,江苏盐城人,硕士研究生,主要从事检测技术方面的研究工作。 Email:642213271@qq.com

    通讯作者:

    者:王强(1976-),男,湖北应城人,博士,教授,主要从事结构健康监测技术方面的研究工作。 Email:qiangwang@cjlu.edu.cn

  • 中图分类号: X931

Mixed interferometric distributed fiber optic sensor PGC demodulation module design and experimental data analysis

Funds: 

国家自然科学基金(51374188);浙江省自然科学基金项目(LR13E040001);质检公益性行业科研专项(201310152)

  • 摘要: 对一种基于马赫-曾德尔和萨格纳克混合干涉仪原理的分布式光纤泄漏检测系统调制解调技术进行研究,对PGC解调技术进行理论分析。针对所选泄漏分布式光纤传感特点设计了PGC解调硬件电路,并对PGC解调电路进行了测试。实验中待测信号为0~50 kHz,载波频率为300 kHz,截止频率为50 kHz, 移相后与待测信号的相关系数达到0.95,谐波失真小于3%,泄漏源位置为7.865 km,泄漏检测定位系统绝对定位误差为235 m,相对定位误差为2.35%。本解调定位系统具有稳定性和抗干扰性。
    Abstract: The demodulation technology based on the Mach-Zehnder and Sagna mixed interferometer distributed optical fiber leak detection system was studied.The theory of phase generated carrier (PGC) demodulation technology was researched and analyzed. According to the characteristics of the selected leak distributed optical fiber sensor, we designed and tested the hardware circuit of PGC demodulation. The experiment signals to be measured are 0~50 kHz, the carrier frequency is 300 kHz and the cut-off frequency is 50 kHz. After phase shifting the correlation coefficient of signals to be measured is 0.95 and the harmonic distortion is less than 3%, the absolute positioning error of demodulation positioning system at the leak location of 7.865km is 235m, the relative positioning error is 2.35%.This demodulation positioning system has stability and anti-interference performance.
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