光学学报, 2017, 37 (9): 0930003, 网络出版: 2018-09-07   

基于三角波调制的免标定气体浓度测量方法研究 下载: 964次

Study on Calibration-Free Measurement Method for Gas Concentration Based on Triangular Wave Modulation
作者单位
东南大学能源与环境学院, 江苏 南京 210096
摘要
可调谐二极管激光吸收光谱技术中的波长调制方法具有适应恶劣环境以及灵敏度高等特点,在气体浓度测量方面得到了广泛应用。与常用的正弦波调制相比,三角波调制方式具有更高的灵敏度,但一般采用标定的方法来实现气体浓度的测量。提出了基于三角波调制的免标定波长调制方法,建立了分布反馈激光器在三角波调制下的频率响应模型。实验结果表明,使用所提频率响应关系式可使标准具信号拟合结果的相对残差小于0.4%,一次谐波归一化二次谐波信号拟合结果的相对残差小于1.2%,证明了该模型的可行性;实现了基于三角波调制的CH4气体浓度的免标定测量。
Abstract
The wavelength modulation method in tunable diode laser absorption spectroscopy is widely used in the measurement of gas concentration due to its advantages of adapting to harsh environment and high sensitivity. Compared with the common sine wave modulation, the triangular modulation has higher sensitivity. However, the triangular modulation method is generally combined with the calibration approach to measure gas concentration. In this study, a new calibration-free method based on triangular wave modulation is proposed and a frequency response model of distributed feedback laser is developed. The experimental results illustrate that the relative residual of etalon signal is less than 0.4% and the relative residual of the first harmonic normalized second harmonic signal is less than 1.2%, which prove the feasibility of the proposed model. The calibration-free measurement of CH4 gas concentration based on triangular wave modulation is realized.

汪步斌, 周宾, 王浩, 熊涌泉, 王一红, 祝仰坤, 王式民. 基于三角波调制的免标定气体浓度测量方法研究[J]. 光学学报, 2017, 37(9): 0930003. Bubin Wang, Bin Zhou, Hao Wang, Yongquan Xiong, Yihong Wang, Yangkun Zhu, Shimin Wang. Study on Calibration-Free Measurement Method for Gas Concentration Based on Triangular Wave Modulation[J]. Acta Optica Sinica, 2017, 37(9): 0930003.

本文已被 4 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!