|本期目录/Table of Contents|

 脉冲编码Φ-OTDR系统性能分析(PDF)

《纳米技术与精密工程》[ISSN:1672-6030/CN:12-1351/O3]

期数:
2017年5期
页码:
400-405
栏目:
精密测量
出版日期:
2017-09-15

文章信息/Info

Title:
 Performance Analysis of Pulse Coded Φ-OTDR System
文章编号:
1672-6030(2017)05-0400-06
作者:
 梁胡格吉乐 封皓 曾周末
 (精密测试技术与仪器国家重点实验室(天津大学),天津300072)
Author(s):
 Liang Hugejile Feng Hao Zeng Zhoumo
 (State Key Laboratory of Precision Measuring Technology and Instruments(Tianjin University), Tianjin 300072, China)
关键词:
 Φ-OTDR 脉冲编码 信噪比
Keywords:
 Φ-OTDR pulse coding signal-to-noise ratio
分类号:
TE832
DOI:
10.13494/j.npe.20160088
文献标识码:
A
摘要:
 研究了基于编码调制的相位敏感光时域反射计(Φ-OTDR)系统原理,该系统向传感光纤注入经过编码后的光脉冲序列,在接收端经过数据处理提升Φ-OTDR系统信噪比,从而提高系统传感距离.对比研究了脉冲编码方式和传统信号处理方式对系统信噪比的影响;采用格雷码进行了实验分析,通过匹配滤波对编码脉冲回拨信号进行降噪处理,并与单脉冲信号结果进行了对比.结果表明,采用脉冲编码可提高ΦOTDR系统动态范围,能有效提升系统综合性能.
Abstract:
 This paper examined the systematic principle of phase sensitive optical time domain reflectometer (Φ-OTDR), and found that the system poured light pulse series coded into sensing optical fiber, to enhance signaltonoise ratio of the system through data processing, thus increasing the sensing distance of the system. The influence of the way of pulse coding on signal-to-noise ratio and that of the traditional way of signal treatment were compared, and Gray code experimental analysis was applied. Through matching filtering to reduce the noise of coded pulse echo signal, and comparing the result of single pulse signal, this paper reveals that pulse coding can increase Φ-OTDR systematic dynamic scope, and promote the synthetic faculty of the system as well.

参考文献/References

备注/Memo

备注/Memo:
收稿日期: 2017-08-10.
基金项目: 国家自然科学基金青年基金资助项目(61304244).
作者简介: 梁胡格吉乐(1989—),男,硕士研究生.
通讯作者: 封皓,副教授,18960793@qq.com.
更新日期/Last Update: 2017-09-28