中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (8): 67-72.doi: 10.16265/j.cnki.issn1003-3033.2019.08.011

• 安全工程技术科学 • 上一篇    下一篇

基于光纤监测技术的燃气管道泄漏研究

高文傲1, 刘洋2, 李登科1, 甘维兵3, 陈先锋1 教授   

  1. 1 武汉理工大学 安全科学与应急管理学院,湖北 武汉 430070;
    2 武汉电力职业技术学院 电力工程系,湖北 武汉 430079;
    3 武汉理工大学 光纤传感技术国家工程实验室 湖北 武汉 430070
  • 收稿日期:2019-04-10 修回日期:2019-06-20 发布日期:2020-10-21
  • 通讯作者: ** 陈先锋(1975—),男,湖北孝感人,博士,教授,博士生导师,主要从事工业安全、防火防爆技术、安全监测等方面的研究。E-mail:109795408@qq.com。
  • 作者简介:高文傲 (1995—),男,山西大同人,硕士研究生,主要研究方向为工业安全和监测预警。E-mail:785701565@qq.com。
  • 基金资助:
    国家重点研发计划(2017KYC0804705);国家自然科学基金资助(NSFC51774221);武汉理工大学研究生优秀学位论文培育项目(2017-YS-051)。

Research on gas pipeline leakage based on optical fiber monitoring technology

GAO Wenao1, LIU Yang2, LI Dengke1, GAN Weibing3, CHEN Xianfeng1   

  1. 1 School of Safety Science and Emergency Management, Wuhan University of Technology, Wuhan Hubei 430070, China;
    2 School of Electrical Engineering, Wuhan Electric Technology College, Wuhan Hubei 430079, China;
    3 Key Laboratory of Fiber Optic Sensing technology, Wuhan University of Technology, Wuhan Hubei 430070, China
  • Received:2019-04-10 Revised:2019-06-20 Published:2020-10-21

摘要: 为提高燃气管道监测的时效性和准确性,利用光纤光栅技术研究燃气管道泄漏过程的振动特性。根据实际工况搭建输气管道试验平台,通过光纤布拉格光栅(FBG)传感系统采集管道壁面振动信息,使用傅立叶变换和滤波等处理手段分析振动信号频谱。结果表明:输气管道泄漏瞬间会产生明显的振动波,泄漏后泄孔附近管道壁面振动的加速度增大,且增幅与泄孔大小呈正相关关系,与沿管道方向传播距离呈负相关关系;泄漏产生了频率约为350 Hz的振动波;应用光纤光栅传感技术定位泄漏点,精度达±2.5 m。

关键词: 燃气管道, 泄漏, 光纤布拉格光栅(FBG), 振动, 监测

Abstract: In order to improve the timeliness and accuracy of gas pipeline monitoring, fiber grating technology is used to study the vibration characteristics of the gas pipeline leakage process. Firstly, a gas pipeline experimental platform was built according to the actual working conditions, then the vibration information of pipe walls was collected through FBG sensing system, and the spectrum analysis of vibration signals was performed by using signal processing methods such as Fourier transform and filtering. The results show that the gas pipeline will produce obvious vibration waves when it leaks; the vibration acceleration of pipe walls near the leak hole increases along with the leak, and the increase is positively correlated with the size of the hole and negatively related with the spreading distance along the pipe; it is also found that a vibration wave with a frequency around 350 Hz is generated from the leak, and fiber grating sensing technology can accurately identify the leak point with an accuracy of ±2.5 m.

Key words: gas pipeline, leakage, fiber Bragg grating (FBG), vibration, monitoring

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