【摘要】 从理论上提出了一种基于比耳 朗伯定律的新型煤矿安全系统瓦斯检测方法.这种方法利用光纤作为探测器件,在甲烷的红外吸收谱线处利用强度吸收法实现对甲烷气体体积分数的检测,并利用差分法实现外界误差的消除,从而达到准确测量的目的.由实验室模拟实验证实这种方法可以大大提高系统的灵敏度.更多还原

【Abstract】 A new coalmine methane detection method based on Beer-Lambert Law using absorption type optic fiber is investigated. This method uses optical fiber as detector for detecting methane with its near-infrared spectrum based on intensity absorbing method. For the purpose of high accuracy, the difference photo-absorption technique is employed to eliminate the environmental noises.The precise results have been proved by stimulant experiment.更多还原