传统的天然气管道泄漏检测技术效率低、速度慢，难以满足实际应用的需要。近年来以近红外二极管激光吸收光谱为基础的光学传感器由于具有灵敏度高、体积小、重量轻和无需维护等优点而得到了广泛的应用。实验以可调谐二极管激光吸收光谱和谐波探测技术为基础，开展便携式天然气管道泄漏遥感探测技术的研究。其中使用多种常见物质作散射体，模拟野外现场背景，进行气体泄漏的探测，并获得较好的探测极限。整套系统仅重5kg，具有良好的便携性。

The leakage of natural gas is not only economic loss,also the fountain of dangerous. Optical sensors based on NIR tunable diode laser absorption spectroscopy were widely used because of high sensitivity,small volume and less maintenance. A portable remote sensor of natural gas pipeline leakage was reported with wavelength modulation and harmonic signals detection technology. With many materials as reflector used and field locale background simulated,the detection of gas leakage was preformed and better detection limit was got. The sensor is portable with only 5 kg weight.