用于天然气管道泄漏监测的光纤激光 管内声波传感器研究  

Research on DFB-FL in-tube Acoustic Sensor for Leakage Monitoring of Natural Gas Pipelines

作　　者：马云宾 王洪超 杨元元 赵庆超 张绪成 Ma Yunbin;Wang Hongchao;Yang Yuanyuan;Zhao Qingchao;Zhang Xucheng(PipeChina Institute of Science and Technology,Tianjin 300450;Laser Institute,Qilu University of Technology(Shandong Academy of Science),Jinan Shandong 250104)

机构地区：[1]国家管网集团科学技术研究总院分公司,天津300450 [2]齐鲁工业大学(山东省科学院)激光研究所,山东济南250104

出　　处：《中国仪器仪表》2025年第4期17-21,共5页China Instrumentation

基　　金：国家石油天然气管网集团有限公司课题“油气管道线路及站场感知技术研究”(WZXGL202106)资助项目。

摘　　要：本文提出一种基于分布反馈光纤激光器的声波传感器,可探测天然气管道泄漏产生的声波信号,从而实现管道泄漏监测。本文利用光纤激光器作为传感元件,采用膜片化结构进行增敏封装并制备传感器样品进行测试。通过实验验证可知,在3.15Hz~5kHz频段内传感器灵敏度为(85.7±5)dB re pm/MPa,最小可探测声压小于1mPa,表明该传感器具有灵敏度高、频带宽,可实现微弱信号探测等优点,是一种适用于天然气管道泄漏监测的新型光纤激光管内声波传感器。An acoustic sensor based on distributed feedback fiber laser is proposed,which can detect the acoustic signal generated by natural gas pipeline leakage,so as to realize pipeline leakage monitoring.The DFB-FL in-tube acoustic sensor uses the fiber optical laser as the sensor element and adopts a diaphragm structure for sensitization packaging.The sensor samples are prepared for testing.The experimental results show that the sensitivity of the sensor is about(85.7±5)dB re pm/MPa in the frequency band of 3.15Hz~5kHz,and the minimum detectable sound pressure is less than 1mPa.It indicates that the sensor has advantages of high sensitivity,wide frequency band,weak signal detection,which is a new type of fiber laser acoustic sensor suitable for natural gas pipeline leakage monitoring.

关 键 词：光纤激光管内声波传感器 管道泄漏监测 高灵敏度 宽频带 微弱信号探测 

分 类 号：TE973.6[石油与天然气工程—石油机械设备]