基于积分球算法的新式瓦斯传感器

New Gas Sensor Based on Integrating Sphere Algorithm

采用积分球结构的新式吸收气室做为瓦斯气体传感器的核心元件,提出一种新的积分球算法用于瓦斯浓度检测的方法。半导体激光器发射1.65μm激光射入装有一定气体分数瓦斯气体的积分球内,由于瓦斯气体对激光的选择性吸收及积分球壁的衰减作用,激光光强减弱,利用积分球算法算出理想衰减率,进而求出由于瓦斯气体吸收而衰减的光强差,最后计算出瓦斯气体体积分数,为瓦斯检测提供了一种新方法。实验表明:该传感器准确度高、重复性好。

Integral sphere structure of the new absorption gas chamber was used as the core components of gas sensors.This paper presented a new algorithm for the concentrations detection of methane.Semiconductor lasers emit 1.65 μm laser into certain gas concentration of integral sphere.Due to selective absorption of laser for the gas,laser self attenuation,laser light intensity was weakened.Using integrl sphere algorithm calculate ideal attenuation of the gas,it provided a new method to calculate gas volume fraction for the gas monitoring.Experiments show that the sensor has the characteristics of high accuracy and good repeatability.