煤矿井下TDMZI光纤定位系统  

Research on underground mine fiber positioning system based on TDMZI

作　　者：郭继坤 陈司晗 张睿 Guo Jikun;Chen Sihan;Zhang Rui(School of Electrical ＆ Control Engineering,Heilongjiang University of Science ＆ Technology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学电气与控制工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2018年第5期577-581,共5页Journal of Heilongjiang University of Science And Technology

基　　金：国家重大科学仪器设备开发专项项目(2012YQ150213)

摘　　要：针对煤矿井下定位系统采用的DMZI分布式光纤振动传感技术中存在灵敏度低、系统的空间分辨率不高等问题,提出了采用双波长双路马赫-曾德干涉测量(TDMZI)振动传感系统的定位方法。该系统采用两个光源,在光环形器和光电探测器之间接入密集波分复用,在光环行器和光纤耦合器之间加入两个偏振控制器,利用互相关法估计时间延迟,分析由定位算法引起的定位误差。结果表明,该系统对扰动事件定位更加精准,灵敏度更高,极大地减小了定位误差。实验证明,TDMZI定位系统能有效提高系统的灵敏度和空间分辨率,从而提高了矿井下应急救援的效率。This paper seeks to develop an improved alternative to DMZI distributed optical fiber vibration sensing technology which suffers from a lower sensitivity and lower spatial resolution when used in coal mine underground positioning system and proposes a novel location method of vibration sensor system based on dual-wavelength dual Mach-Zehnder interferometry（TDMZI）. The system works by applying two light sources, introducing Dense Wavelength Division Multiplexing between the optical circulator and the photodetector, and providing two polarization controllers between the optical circulator and the fiber coupler;and estimating the time delay using cross-correlation method and thereby analyzing the positioning error caused by the positioning algorithm. The results show that the system with a greater accuracy in positioning the disturbance event and a higher sensitivity could provide a great reduction in the positioning error. It follows that TDMZI positioning system enables an effective improvement in the sensitivity and spatial resolution of the system, thereby promoting the efficiency of emergency rescue under the mine.

关 键 词：煤矿井下定位 分布式光纤 振动传感技术 TDMZI 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]