基于近红外光谱差分吸收法的甲烷激光式检测系统研究

Research of Methane′s Laser Detection System Based on Near-infrared Differential Absorption Spectroscopy Technique

甲烷是导致煤矿爆炸事故的主因,取决于甲烷在空气中的爆炸极限。甲烷气体的浓度直接影响矿井作业的安全,这里提出一种新型的甲烷激光式检测系统,利用近红外光谱差分吸收技术,结合最小二乘拟合方法求出气体浓度。较传统的催化燃烧检测方式,提高了系统精确度、灵敏度、抗交叉干扰能力,能够实时在线检测甲烷气体浓度。将该系统应用于煤矿束管监测系统中,将有助于矿井安全作业,有广泛的工业应用前景。

Methane is the main reason leading to coal mine explosion, which depends on the methane′s explosive limit in the air. The concentration of methane gas directly affects the safety of mine operations. Puts forward a new type of methane′ s laser detection system, which uses near-infrared differential absorption spectroscopy technique, and combines least-squares fitting method to obtain gas concentrations. Comparing with the traditional catalytic combustion detection method, the new system improves the accuracy, sensitivity and Anti-Cross-Interference ability, and it also can detect methane gas concentration real-time online. The usage of this mine Detection System will contribute to the safe operation of the mine, and it has a broad prospect for industrial application.