我国煤矿安全技术保障体系从总体上已基本形成,但还存在矿井瓦斯抽放规模和抽放效率仍然偏低、瓦斯监测仪器仪表和传感器的可靠性与快速反应能力不高等问题。文章探讨了瓦斯红外传感检测系统的设计与组成,论述了无线传感器节点的设计与瓦斯微弱信号的检测技术。测试与运行表明,该系统功能良好。 China’s coal mine safety technology support system has basically taken shape on the whole, but there are still some problems such as the scale and drainage efficiency of mine gas drainage is still low, and the reliability and rapid response capability of gas monitoring instruments and sensors are not high. This paper discusses the design and composition of gas infrared sensing detection system, and discusses the design of wireless sensor nodes and the detection technology of weak gas signals. Tests and runs show that the system works well.