Half-Width Integral Method for Gas Concentration Measuring in Tunable Diode Laser Absorption Spectroscopy
Half-Width Integral Method for Gas Concentration Measuring in Tunable Diode Laser Absorption Spectroscopy
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DOI：
10.1080/00387010.2012.697090
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发表时间：
2013-04
影响因子：
1.7
通讯作者：
Ding Yanjun;Li Xiaohang;Peng Zhimin;Che Lu
中科院分区：
文献类型：
--
作者：
Ding Yanjun;Li Xiaohang;Peng Zhimin;Che Lu
摘要分析了随机误差和吸收形状拟合误差对可调谐半导体激光吸收光谱中气体浓度测量的影响。根据随机误差的特点，提出了一种新的数据处理方法，并对吸收曲线进行了拟合。该方法在实际测量中仅利用拟合吸收波形的半高半宽内的积分值来确定气体浓度。同时，选择13，150.197 cm−1处的O2跃迁，使用该方法测量O2浓度。与传统方法相比，本文建立的方法能够准确测量O2浓度。
ABSTRACT We analyze the influence of random errors and absorption shape fitting errors on gas concentration measurement in tunable diode laser absorption spectroscopy. We then propose a new data processing method according to the characteristic of random errors and fitting absorption shape. This method only uses the integral value within the half width at half maximum of the fitting absorption shape to determine the gas concentration in actual measurements. Meanwhile, the O2 transition at 13,150.197 cm−1 is selected to measure the O2 concentration using this method. Compared with the traditional method, the method established in this paper can accurately measure O2 concentration.