Combination of Phase-Sensitive OTDR and Michelson Interferometer for Nuisance Alarm Rate Reducing and Event Identification
Combination of Phase-Sensitive OTDR and Michelson Interferometer for Nuisance Alarm Rate Reducing and Event Identification
复制标题
相敏 OTDR 和迈克尔逊干涉仪的组合可降低误报率并识别事件
DOI：
10.1109/jphot.2016.2538078
复制
发表时间：
2016-04-01
影响因子：
2.4
通讯作者：
Zhang, Kangning
中科院分区：
文献类型：
--
作者：
Liang, Sheng;Sheng, Xinzhi;Zhang, Kangning
为了获得低干扰报警率（NAR）和实现干扰事件识别，提出了相敏光学时域反射计（phi-OTDR）与迈克尔逊干涉仪（MI）的波分复用组合。该干扰由phi-OTDR和MI同步检测，只有当phi-OTDR和MI都检测到真实干扰时才会产生真报警，并通过MI信号的等效频率分布分析来识别确定的真实干扰的事件识别。实验发现，通过单个phi-OTDR， NAR可以从13.5%降低到1.2%，检测概率高达92%。此外，四种干扰事件的识别率达到90%。本文提出的一种基于i- otdr和MI的波分复用方法简单、成本低，不需要复杂的算法，只需要一根传感光纤；因此，它是一个有趣的探索多路复用的phil - otdr和干涉仪。
In order to obtain low nuisance alarm rate (NAR) and achieve the disturbance event identification, the wavelength-division multiplexing combination of a phase-sensitive optical time-domain reflectometer (phi-OTDR) and a Michelson interferometer (MI) is proposed and demonstrated. The disturbance is synchronously detected by a phi-OTDR and an MI. A true alarm is presented only when a real disturbance is detected by both phi-OTDR and MI. Furthermore, the event identification of the confirmed real disturbance is recognized by an equivalent frequency distribution analysis on the MI signal. It is found that, by the experiment, NAR can be reduced to 1.2% from 13.5% via a single phi-OTDR, with a high detection probability of 92%. Furthermore, four disturbance events can be distinguished with a 90% identification rate. Our proposed wavelength-division multiplexing of a phi-OTDR and an MI is simple and low cost, no complicated algorithm is required, and only one sensing fiber is needed; therefore, it is an interesting exploration of multiplexing of phi-OTDR and interferometers.