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一种新型静态样品池系统应用于高温谱线参数测量

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在实际高温气体探测工况下,温度的变化往往会对所测气体谱线参数测量结果带来不同程度的影响,且有时难以实现实时在线测量.因此该研究旨在设计加工一个新型高温样品池模拟高温环境,并在其基础上搭建一套可调谐二极管激光吸收光谱测量系统用来对目标气体高温环境下的光谱进行探测,实现对谱线参数的精确检测.针对高温样品池的设计,采用Comsol对样品池材料的固体导热特性进行模拟分析,从而确定最佳加工所需尺寸和材质.经检测,设计加工后的高温样品池具有良好的性能,可在300～1 000 K温度范围及-0.1～10 atm压力范围内工作,在1 000 K温度下样品池温度的最大偏差为20 K;在真空条件下,当温度为300和1 000 K时分别测量到的气体泄漏速率为5和10 Pa·min-1.使用中心波长为1 573 nm的分布反馈(DFB)半导体激光器作为光源测量了 HITRAN2016数据库中参数较为准确的CO分子的部分高温光谱,并把依此反演得到的谱线参数与HITRAN数据库进行对比分析,误差基本在5％以内,证明了所设计加工高温样品池的良好性能,可为高温环境下的气体谱线参数测量提供帮助.
A Static Sample Cell System for Gas Absorbance Spectrum Measurement Under High Temperature
In the practical high-temperature gas detection case,the measured results of the gas spectral line parameters are often affected by temperature changes.Sometimes,it is even difficult to achieve real-time online measurement.Therefore,this paper aims to design and process a new high-temperature sample cell to simulate a high-temperature environment and build a tunable diode laser absorption spectrum measurement system to detect the spectrums of the target gas in a high-temperature environment.In this way,the accurate detection of spectral line parameters can be achieved.In the design of a high-temperature sample cell,Comsol was used to simulate and analyze the solid thermal conductivity of various materials to determine the optimal processing materials and size.The results show that good properties of the high-temperature sample cell are obtained.It can work in the temperature range of 300～1 000 K and the pressure range of-0.1～10 atm.The maximum temperature deviation of the sample cell at 1 000 K is 20 K.The measured leakage rates at 300 and 1 000 K are 5 and 60 Pa·min-1,respectively.This paper uses a distributed feedback(DFB)semiconductor laser with a center wavelength of 1 573 nm as the light source to measure the partial high-temperature spectrums of CO molecules with relatively accurate parameters in the HITRAN2016 database.The comparison between the spectral line parameters obtained from the inversion and those in the HITRAN database indicates that the error is within 5％.The good performance of the designed high-temperature sample cell was proved,which can help in the measurement of gas spectral line parameters in high-temperature environments.

Gas detectionAbsorbance spectrumHigh-temperature sample cellPerformance testSpectral inversion

黄文健、张铭珂、高光珍、王宣、杨玉冰、蔡廷栋

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江苏师范大学物理与电子工程学院,江苏徐州 221116

气体探测 吸收光谱 高温样品池 性能测试 谱线反演

国家自然科学基金项目国家自然科学基金项目国家自然科学基金项目国家自然科学基金项目国家自然科学基金项目国家自然科学基金项目江苏省重点研发计划(社会发展)专项资金项目江苏省碳达峰碳中和科技创新专项资金项目

622751104227513661875079618051106147506811104237BE2021634BE2022314

2024

10.3964/j.issn.1000-0593(2024)08-2152-06

光谱学与光谱分析
中国光学学会

光谱学与光谱分析

CSTPCD北大核心
影响因子：0.897
ISSN：1000-0593
年,卷(期)：2024.44(8)
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