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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 the principle of topography backscattering and harmonic detection, a set of natural gas pipeline leak laser remote sensing detection system is designed and established. Based on this platform, the detection distance is 120 m and the simulated natural gas leakage source with volume fraction of 0.308% Distance remote sensing detection, and the trace methane gas in the air was measured, the minimum detection sensitivity of the system is about 3 × 10-5m; at the same time the impact of different scattering body reflection efficiency tρot on the experiment, proposed and experimentally verified new The integral concentration calibration method is feasible, the experimental results can meet the actual detection needs.