计算机工程与设计
計算機工程與設計
계산궤공정여설계
Computer Engineering and Design
2015年
10期
2878-2881
,共4页
干扰性分布式光纤技术%多泄漏位置检测%频谱分析%定位%长输管道
榦擾性分佈式光纖技術%多洩漏位置檢測%頻譜分析%定位%長輸管道
간우성분포식광섬기술%다설루위치검측%빈보분석%정위%장수관도
interference type distributed optical fiber technology%leakage position detection%spectrum analysis%positioning%long-distance pipeline
针对干扰型分布式光纤技术天然气长输管道泄漏检测系统中多泄漏位置检测方面存在的缺陷，提出一种光纤感测信号频谱分析与定位方法。推导多点发生泄漏时的光纤信号表达式，结合相位生成载波解调技术对光纤信号进行解调。在泄漏信号频谱的模拟实验中，找到一个2泄漏点信号的频谱分析方法和定位系统。实验结果表明，在50 km的天然气长输管道中，该方法能够有效识别两泄漏点频谱，对两泄漏点的相对定位误差小于9.99％，有效提高了检测系统的检测性能，具有较高鲁棒性。
針對榦擾型分佈式光纖技術天然氣長輸管道洩漏檢測繫統中多洩漏位置檢測方麵存在的缺陷，提齣一種光纖感測信號頻譜分析與定位方法。推導多點髮生洩漏時的光纖信號錶達式，結閤相位生成載波解調技術對光纖信號進行解調。在洩漏信號頻譜的模擬實驗中，找到一箇2洩漏點信號的頻譜分析方法和定位繫統。實驗結果錶明，在50 km的天然氣長輸管道中，該方法能夠有效識彆兩洩漏點頻譜，對兩洩漏點的相對定位誤差小于9.99％，有效提高瞭檢測繫統的檢測性能，具有較高魯棒性。
침대간우형분포식광섬기술천연기장수관도설루검측계통중다설루위치검측방면존재적결함，제출일충광섬감측신호빈보분석여정위방법。추도다점발생설루시적광섬신호표체식，결합상위생성재파해조기술대광섬신호진행해조。재설루신호빈보적모의실험중，조도일개2설루점신호적빈보분석방법화정위계통。실험결과표명，재50 km적천연기장수관도중，해방법능구유효식별량설루점빈보，대량설루점적상대정위오차소우9.99％，유효제고료검측계통적검측성능，구유교고로봉성。
In view of the defects in detection of multiple leaking positions in the leak detection system of interference type distribu‐ted optical fiber technology long distance natural gas pipeline ,a kind of optical fiber sensor signal spectrum analysis and positio‐ning method was put forward .The optical signal expression for the leakage in multiple points was derived ,and the demodulation of fiber optic signals was carried out combined with the technology of phase generated carrier demodulation technology .In the simulation of leakage signal spectrum ,a spectrum analysis method and positioning system with 2 leak point signals was found out .The simulation results show that for the 50 km gas transmission pipeline ,this method can effectively identify two spectrum leakage points ,the relative positioning error of the two leakage points is less than 9.99% ,so the detection performance of the detection system is effectively improved ,and high robustness is achieved .
