光干涉瓦斯传感器的光路系统  

Light Path System of Light Interference Methane Sensor

作　　者：翟波[1] 戴峻 吴晶 

机构地区：[1]北京信息职业技术学院,北京100015 [2]煤科集团沈阳研究院有限公司,辽宁抚顺113122 [3]辽宁省抚顺市计量测试所,辽宁抚顺113006

出　　处：《煤矿安全》2015年第12期92-95,共4页Safety in Coal Mines

基　　金：国家自然科学基金青年科学基金资助项目(61403372)

摘　　要：对传统光干涉瓦斯传感器的光路系统进行了改进,简化了光路系统,并加入了光电转换部分,使其更适合智能检测仪表的设计要求,并从波动光学理论出发,进一步推导出干涉条纹光强变化与光程差的关系式,以及气体折射率与浓度的关系。最后通过仿真计算得到了干涉条纹,验证了气体浓度与其折射率的对应关系以及气体浓度改变与固定点处光强变化的关系。In this paper,traditional light interference methane sensor is improved. The light system is simplified,adding the optical-electrical conversion part. It is suitable for intelligent detecting instrument design requirements. On the basis of the theory of wave optics,this paper deduces the relationship between interference fringe intensity and optical path difference,and the relations of gas refractive index and concentration. Finally,the interference fringes are obtained by simulation calculation. The relationship between gas concentration and refractive index,and the relationship between the change of gas concentration and the intensity of fixed point is verified.

关 键 词：瓦斯传感器 光干涉 光程差 光路系统 甲烷检测 

分 类 号：TD679[矿业工程—矿山机电]