摘要
为了研究可调谐半导体激光吸收光谱(TDLAS)技术在气体检测过程中,正压条件下的相邻谱线影响问题,建立基于积分吸光度的压力测量模型。以CO_(2)为研究对象,在室温、高纯度条件下进行了范围为(1~2)atm的压力测量仿真和实验。实验结果显示:随着压力的增大,相邻吸收谱线相互影响程度加剧,吸光度曲线偏离零基线的程度加大;实验测量结果在1.25 atm处最大相对偏差为4.94%,在2.00 atm处最小相对偏差为0.73%,平均相对偏差为3%。
In order to study the influence of adjacent spectral lines under positive pressure in the gas detection process of tunable diode laser absorption spectroscopy(TDLAS)technology,a pressure measurement model based on integral absorbance was established.Taking CO_(2)as the research object,the simulations and experiments of pressure measurement in the range of(1~2)atm were carried out at room temperature and high purity.The results show that as the pressure increases,the degree of mutual influence between adjacent absorption spectral lines increases,and the degree of deviation of the absorbance curve from the zero baseline increases.The pressure measurement results have a maximum relative deviation of 4.94%at 1.25 atm,a minimum relative deviation of 0.73%at 2.00 atm,and an average relative deviation of 3%.
作者
张博涵
杨军
谢兴娟
姜延欢
ZHANG Bohan;YANG Jun;XIE Xingjuan;JIANG Yanhuan(Changcheng Institute of Metrology and Measurement,Beijing 100095,China)
出处
《应用光学》
CAS
CSCD
北大核心
2022年第1期106-110,共5页
Journal of Applied Optics
基金
国家自然科学基金(51775526)。
关键词
吸收光谱
正压
积分吸光度
CO_(2)
absorption spectrum
positive pressure
integral absorbance
CO_(2)
