广东石油化工学院学报2025，Vol.35Issue(6)：80-85,6.DOI:10.26962/j.cnki.1991.2025.0056
基于谐波信号模板匹配算法的近红外激光甲烷遥测
Near-Infrared Laser Methane Remote Monitoring Based on Template Matching Algorithm of Harmonic Signals
摘要
Abstract
Accurate and reliable methane emission monitoring technology is an important part of oil and gas infrastructure to achieve safe production and low-carbon emission reduction.A miniaturized and low-cost methane telemetry equipment was developed based on near-infrared absorption spectroscopy technology.Based on the first harmonic normalized second harmonic wavelength modulation technology(WMS-2f/1f),a distorted harmonic template matching algorithm(WMS-2f/1f-DHTM algorithm)was proposed.Using the harmonic signal joint analysis method,combined with the backscattered echo signal of non-cooperative target,the laser path integral concentration was obtained.The results show that compared with the traditional wavelength modulated spectral first harmonic normalized second harmonic algorithm,the proposed algorithm avoids the problem of false alarm of no target gas.Compared with the direct absorption spectroscopy algorithm,the root mean square error of concentration inversion with a detection distance of 20 m is reduced by 57.6%,and the minimum detection limit of the system is 3.79 ppm·m.The proposed method can suppress the fluctuation of output concentration caused by open path non cooperative target detection and avoid the false alarm problem in non-target gas detection.The proposed method effectively suppresses the fluctuation of concentration output signal caused by open path non cooperative target detection.At the same time,through the feature discrimination mechanism,the method significantly reduces the false alarm rate when there is no target gas and solves the problem of false alarm.关键词
甲烷逸散/甲烷遥测/波长调制技术/畸变波形模板匹配Key words
methane emission/methane telemetry/wavelength modulation technology/distortion harmonic template matching分类
能源科技引用本文复制引用
沈书乾,蔡雅欣,李玉爽,王迪,濮御,石少卿..基于谐波信号模板匹配算法的近红外激光甲烷遥测[J].广东石油化工学院学报,2025,35(6):80-85,6.基金项目
黑龙江省"揭榜挂帅"科技攻关项目(2023ZXJ06A04,2024ZXJ01A04) （2023ZXJ06A04,2024ZXJ01A04）
第十一届中国创新创业大赛(广东茂名赛区)暨"油城科创"杯创新创业大赛项目(MB20223612) （广东茂名赛区）
