摘要
燃气管道由于其功能的特殊以及深埋于地下或海底的环境,如果泄漏将引起灾难性的后果。泄漏引起的负压波会导致管道内压降低,进而引起管道环向应变减小。提出一种利用光纤光栅应变传感器测量管道环向应变,对管道泄漏进行无损监测的方法。利用准分布式安装在燃气管道模型主线以及支线上的光纤光栅应变传感器(fiber Bragg grating,简称FBG)进行多种泄漏工况模拟试验,包括不同位置泄漏、支线泄漏和模拟调泵。试验结果表明,光纤光栅应变传感器能够迅速准确地监测到管道的泄漏信号,这种基于环向应变监测的管道泄漏监测方法是可行的,具有很大的发展前景。
Natural gas pipelines are usually embedded in the ground or seabed,so detecting pipeline leakage is an important issue inits safe operation.In order to effectively do so,a method using a fiber bragg grating(FBG)strain sensor is presented based on hoop strain monitoring.The negative pressure wave induced by pipeline leakage would induce a decline in internal pressure,which can be directly detected by the hoop strain sensor.In this paper,a series of experiments are conducted using the FBG strain sensors,which sample the hoop strain variation data in different tests,including pipeline leakage with different positions at different rates,branch pipeline leakage,and pipeline pump regulation simulations.Experimental results show that the FBG strain sensor can be applied to accurately detect gas pipeline leakage information in real-time,showing that the method is effective and promising.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2015年第5期820-825,987,共6页
Journal of Vibration,Measurement & Diagnosis
基金
国家自然科学基金委创新研究群体基金资助项目(51121005)
国家自然科学基金面上资助项目(51108059)
国家重点基础研究发展计划("九七三"计划)资助项目(2011CB013605)
高等学校学科创新引智计划资助项目(B08014)
关键词
管道
泄漏监测
光纤光栅
传感器
环向应变
pipeline
leakage detection
fiber bragg grating
sensor
hoop strain
