天然气管道泄漏激光遥感探测系统的研制及标定方法

Natural Gas Pipeline Leak Detection System for Laser Remote Sensing and Calibration

基于地形后向散射和谐波探测原理,设计并建立了一套天然气管道泄漏激光遥感探测系统,并基于此平台实现了探测距离在120 m,对体积分数为0.308%的模拟天然气泄漏源进行远距离遥感探测,并对空气中痕量甲烷气体进行了测量,系统的最小探测灵敏度约为3×10-5m;同时研究了不同散射体的反射效率tρot对实验的影响,提出并实验验证了新的积分浓度标定方法的可行性,其实验结果能够满足实际探测需要。

Based on principle of the bidirectional reflectance distribution function（BROF） and theory of harmonic detection about remote sensing system,we design and build a gas pipeline leak detection system of laser remote sensing.This platform detect distance is 120 m.The concentration of 0.308% on the natural gas simulation of remote sensing can realized the air trace gas detection of methance.The minimum detection sensitivity of the system is about 3×10^-5 m.At the same time we studied the efficiency ρtotof various reflection scattering effect on the experiment.The feasibility of the new calibration method for the concentration is proposed and experimentally verificated.The experimental results can using in the real detection.