激光与光电子学进展, 2019, 56 (19): 193001, 网络出版: 2019-10-23   

基于固定波长法吸收光谱技术的CO2温度测量 下载: 988次封面文章

Temperature Measurement of Carbon Dioxide Using Fixed-Wavelength Absorption Spectroscopy Technique
作者单位
浙江大学能源工程学院能源清洁利用国家重点实验室, 浙江 杭州 310027
摘要
可调谐半导体激光吸收光谱(TDLAS)是一种测量气体浓度和温度的非侵入式测量方法,通常需要在整个谱线上进行扫描,扫描过程中可能存在其他谱线干扰,且测量速度较慢。为克服此问题,可以采用固定波长吸收光谱测量方法。为了研究固定波长法吸收光谱技术测温的效果,采用中心波长位于2.0 μm附近的分布反馈式激光器,开展CO2气体温度测量实验。通过查询数据库模拟待测光谱的线型函数峰值,仿真待测工况下吸收峰值比值与温度的关系,并利用管式炉进行测量。结果显示,该方法的测量温度与设定温度具有高度的一致性,在673~1273 K,测温平均误差为1.22%,证明了固定波长法直接吸收光谱技术应用于温度测量的可行性与准确性。
Abstract
Tunable diode laser absorption spectroscopy (TDLAS) technique is a non-intrusive measurement method for measuring gas concentration and temperature,and it requires scanning over the entire spectrum. To relieve the overlapping spectral interference and increase the measurement rate, a fixed-wavelength absorption spectroscopy technique is used. To study the effect of fixed-wavelength absorption spectroscopy for temperature measurement, a distributed feedback laser with a center wavelength around 2.0 μm is used to measure the temperature of CO2. Since the absorption spectrum peak is affected by the lineshape function, the peak value of the lineshape function is simulated by querying the database, and then the relationship between the absorption peak ratio and temperature under the test condition is simulated. Finally, a tube furnace is used in the validation experiment. The experimental results show that the measured temperature is highly consistent with the set temperature. In the range of 673-1273 K, the average temperature measurement error is 1.22%, which proves the feasibility and accuracy of the fixed-wavelength absorption spectroscopy technique.

张雅琪, 王飞, 崔海滨. 基于固定波长法吸收光谱技术的CO2温度测量[J]. 激光与光电子学进展, 2019, 56(19): 193001. Yaqi Zhang, Fei Wang, Haibin Cui. Temperature Measurement of Carbon Dioxide Using Fixed-Wavelength Absorption Spectroscopy Technique[J]. Laser & Optoelectronics Progress, 2019, 56(19): 193001.

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