Modeling of Pipeline Leakage Detection and Prewarning System for Locating Error Analysis Based on Jones Matrix
Modeling of Pipeline Leakage Detection and Prewarning System for Locating Error Analysis Based on Jones Matrix
复制标题
基于琼斯矩阵的管道泄漏检测预警系统定位误差分析建模
DOI：
10.1627/jpi.52.114
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发表时间：
2009-05-01
影响因子：
1
通讯作者：
Zhuge, Jingchang
中科院分区：
文献类型：
--
作者：
Feng, Hao;Zhu, Lin;Zhuge, Jingchang
提出了分布式光纤管道泄漏检测预警系统的检测定位原理。针对定位过程中经常出现的严重误差，基于单模光纤双折射的等效琼斯矩阵，建立了油气管道光纤预警系统的光偏振模型。仿真结果表明，产生粗误差的原因是两个信号的不一致，这意味着光电探测器从同一震源采集的信号是不相关的。根据理论模型，提出了采用外置极化控制器改变极化方向的解决方案。实验证明，该方案能较好地解决该问题，提高定位精度。此外，该理论模型还可以为系统的改进和光学结构的调整提供理论指导。
The detecting and locating principle of the distributed optical fiber pipeline leakage detecting and prewarning system is proposed in this paper. In allusion to gross error which often occurred in the locating process, the optical polarization model of oil and gas pipeline fiber warning system is established in this paper, which is based on the equivalent Jones matrix of the single-mode optical fiber birefringence. By emulating the model, the reason of the gross error is the discrepancy of two signals, which means that the signals acquired by the photodetectors from the same vibroseis are not correlative. According to the theoretical model, the solution of using external polarization controller to change the polarization direction is put forward. It is proved by the experiment that the solution can solve the problem preferably and improve locating accuracy. Furthermore, theoretical guidance of the system improvement and the adjustment in optical structure can be provided based on the theoretical model.