| 基于TDLAS直接吸收法的气体压力测量技术研究 |
| Research on Gas Pressure Measurement Technology Based on TDLAS Direct Absorption Method |
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| 中文摘要: |
| 针对气体压力无接触测量需求，开展了基于TDLAS直接吸收法的气压测量技术分析。以CO2为研究对象，通过对以朗伯-比尔定律为基础的吸收光谱理论研究，建立压力测量模型，并利用MATLAB软件对气压测量过程进行仿真，将仿真结果与SpectraPlot结果进行对比，同时搭建实验系统进行验证。结果显示在1～2 atm的气压范围内，吸光度曲线仿真结果与SpectraPlot的结果高度重合，积分吸光度值最大偏差小于8%；压力测量实验结果相对误差呈现随压力增大而增大的趋势，该结果为以后吸收光谱法测量中压气体进一步研究提供了参考。 |
| 英文摘要: |
| In response to the demand for non-contact measurement of gas pressure, a technical analysis of barometric pressure measurement based on the TDLAS direct absorption method was carried out. Taking CO2 as the research object, through the theoretical study of absorption spectrum based on Beer-Lambert law, a pressure measurement model is established, the pressure measurement process is simulated by MATLAB software, and the simulation results are compared with the results of SpectraPlot. Finally, an experimental system was built for verification. The results show that in the pressure range of 1 to 2 atm, the simulation results of the absorbance curve are highly coincident with the results of SpectraPlot, and the maximum deviation of the integrated absorbance value is less than 8%. The relative error of the pressure measurement experiment results shows a trend of increasing with the increase of pressure. This conclusion provides a reference for the future research on the measurement of medium pressure gas by absorption spectroscopy. |
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| 中文关键词: TDLAS 直接吸收法 Simulink 气体压力 SpectraPlot |
| 英文关键词:TDLAS direct absorption method Simulink gas pressure SpectraPlot |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2021.05.11 |
| 引用本文：张博涵1，杨军1，魏伟2，谢兴娟1，张大治1，姜延欢1.基于TDLAS直接吸收法的气体压力测量技术研究[J].计测技术,2021,(5):. |
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