激光与光电子学进展, 2019, 56 (21): 213001, 网络出版: 2019-11-02
基于石英增强光声光谱的H2S痕量气体检测研究 下载: 1290次
Detection of Trace Sulfur Dioxide Gas Using Quartz-Enhanced Photoacoustic Spectroscopy
图 & 表
图 1. 洛伦兹线型吸收谱线的1~4次谐波分量系数
Fig. 1. Coefficients of 1st-4th order harmonic components of Lorentz absorption line
图 3. 石英音叉的三维模型。(a)石英音叉的尺寸参数;(b)石英音叉的三维模型
Fig. 3. Three-dimensional model of quartz tuning fork.(a) Size parameters of quartz tuning fork; (b) three-dimensional modeling of quartz tuning fork
图 4. 石英音叉前6阶模态振型图。(a) 1阶;(b) 2阶;(c) 3阶;(d) 4阶;(e) 5阶;(f) 6阶
Fig. 4. Vibration shapes of first six order models of the quartz tuning fork. (a) 1st order; (b) 2nd order; (c) 3rd order; (d) 4th order; (e) 5th order; (f) 6th order
图 5. H2S、H2O与CO2吸收线强的对比
Fig. 5. Comparison of absorption line intensities of hydrogen sulfide, water, and carbon dioxide
图 6. 仿真得到的体积分数为20×10-6的H2S气体的吸收光谱
Fig. 6. Simulated absorption spectrum of hydrogen sulfide gas with volume fraction of 20×10-6
图 7. 石英音叉谐振频率的扫描原理图
Fig. 7. Schematic of resonant frequency scanning for quartz tuning fork
图 8. 基于QEPAS测量H2S气体的系统结构示意图
Fig. 8. Structural diagram of hydrogen sulfide gas measurement system based on QEPAS
图 9. 不同浓度H2S气体的光声信号
Fig. 9. Photoacoustic signals under different concentrations of hydrogen sulfide gas
表 1石英音叉尺寸参数
Table1. Size parameters of quartz tuning fork
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表 2石英音叉前6阶模态仿真结果
Table2. Simulated results of the first six modes of quartz tuning forkHz
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张蕾蕾, 刘家祥, 朱之贞, 方勇华, 吴越, 杨文康, 陶孟琪, 宁志强. 基于石英增强光声光谱的H2S痕量气体检测研究[J]. 激光与光电子学进展, 2019, 56(21): 213001. Leilei Zhang, Jiaxiang Liu, Zhizhen Zhu, Yonghua Fang, Yue Wu, Wenkang Yang, Mengqi Tao, Zhiqiang Ning. Detection of Trace Sulfur Dioxide Gas Using Quartz-Enhanced Photoacoustic Spectroscopy[J]. Laser & Optoelectronics Progress, 2019, 56(21): 213001.