文档介绍：武汉科技大学 硕士学位论文 第 I页
摘 要
近年来随着我国经济的高速发展，对煤炭类基础能源的需求也随之增加。煤炭的开采
过程中产生的***是易燃易爆的，一旦发生***爆炸，往往造成大量的人员伤亡和财产损
失。而甲烷气体约占***气体含量80%以上。因此，做好矿井中甲烷气体的实时、快速、
精确的浓度检测是十分必要的，对于我国煤炭的安全生产有着十分重要的意义。
光谱吸收式气体传感技术是光谱分析技术与现代光纤技术相结合的产物，实现了光谱
分析技术在气体在线检测领域的实用化，吸收式光谱传感器具有灵敏度高、响应速度快、
抗电磁干扰、耐腐蚀、实现信号长距离无损耗传输等诸多优点。
本文首先对甲烷气体的检测方法和甲烷浓度传感器的研究现状进行了归纳综述，然后
基于可调谐半导体激光吸收光谱技术（TDLAS）研制了一种在线甲烷气体浓度检测仪，详
细介绍了该检测仪的硬件设计和软件设计，该检测仪能实现浓度实时连续的测定显示，浓
度超限报警、红外遥控等功能，是煤矿安全检测系统中的核心检测部分。同时为了提高检
测仪的测量精度，本文使用平均滤波思想和波形平均想设计算法计算出气体浓度。
实验证明该甲烷浓度检测仪较之传统甲烷检测仪检灵敏度高、抗干扰能力强、响应速
度快、连续分析能力强。
关键字：甲烷；检测仪；滑动平均算法；红外光谱吸收
第 II 页 武汉科技大学 硕士学位论文
Abstract
In recent years with the rapid development of China's economic, the demand of the type
of fundamental energy such as coal have increased. Methane produced during the mining of
coal is flammable and explosive, once the gas explosion, often causing heavy casualties and
property losses. However methane gas accounts for about 80% of gas content. Therefore,
completing the mine methane gas in real-time, fast and accurate concentration measurement
is very necessary for the safe production of coal , and is of a very important significance.
Absorption optical fiber gas sensor technology is the combination of spectrum
analysis technology and fiber optic technology , spectrum analysis technology used in the
practical in online measurement of gas absorption optical fiber sensor is of high
sensitivity, fast response, resistance to electromagnetic interference, corrosion resistance, for
signal transmission over long distances without loss, and other advantages.
Firstly, this paper gives a overview of the detection of methane gas and the current
situation of methane concentration sensor and then based on tunab