摘要
Adopted the distribution feedback type (DFB) laser to measure the coal mine gas methane,according to the methane located 1.6 tJm nearby 2v3 with a R9 direct ab- sorption spectrum,attraction wire intensity of each line was calculated through the multi-line Voigt fitting.The experimental result indicates that in the obtained four attraction recover of wire,the maximum deviation is 2.7%,and the minimum deviation is 0.02%, other results are all in experimental error scope.This research method may apply in the spectrum survey methane gas density,it has characteristics including high precision, strong selectivity,fast response and so on.
Adopted the distribution feedback type （DFB） laser to measure the coal mine gas methane, according to the methane located 1.6 μm nearby 2v3 with a R9 direct absorption spectrum, attraction wire intensity of each line was calculated through the multi-line Voigt fitting. The experimental result indicates that in the obtained four attraction recover of wire, the maximum deviation is 2.7%, and the minimum deviation is 0.02%, other results are all in experimental error scope. This research method may apply in the spectrum survey methane gas density, it has characteristics including high precision, strong selectivity, fast response and so on.
基金
the National Natural Science Foundation of China(50574005)
Natural Science Foundation of Education Department of Anhui,China(2005KJ081)
关键词
煤矿
瓦斯
波长调制
光谱技术
检测
coal mine gas, absorption line intensity, multi-line Voigt fitting, spectrum survey
