可调谐二极管激光吸收光谱技术测量低温流场水汽露点温度

聂伟; 许振宇; 阚瑞峰; 阮俊; 姚路; 王斌; 张步强; 何亚柏

doi:10.3788/OPE.20182608.1862

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可调谐二极管激光吸收光谱技术测量低温流场水汽露点温度

激光光谱技术 | 更新时间：2020-08-13

- 可调谐二极管激光吸收光谱技术测量低温流场水汽露点温度
- Measurement of low water vapor dew-point temperature based on tunable diode laser absorption spectroscopy
- 光学精密工程 2018年26卷第8期页码：1862-1869
- 作者机构：
  
  1.中国科学院合肥物质科学研究院安徽光学精密机械研究所, 安徽合肥 230031
  2.中国科学技术大学, 安徽合肥 230026
  3.中国空气动力研究与发展中心, 四川绵阳 621000
- 作者简介：
  
  [ "聂伟(1989-), 男, 江西宜春人, 博士研究生, 2013年于内蒙古师范大学获得学士学位, 主要研究方向为激光光谱技术及其应用。E-mail:wnie@aiofm.ac.cn" ]
  许振宇(1986-), 男, 安徽亳州人, 副研究员, 2007年于安徽大学获得学士学位, 2013年于中科院安徽光学精密机械研究所获得博士学位, 主要从事激光光谱技术及其在流场诊断中的应用研究。E-mail:zyxu@aiofm.ac.cn XU Zheng-yu, E-mail:zyxu@aiofm.ac.cn
  阚瑞峰(1977-), 男, 辽宁锦州人, 研究员, 博士生导师, 2000年于长春光学精密机械学院获得学士学位, 2003年于中科院安徽光学精密机械研究所获得硕士学位, 2006年于中科院合肥物质科学研究院获得博士学位, 主要从事激光光谱高灵敏检测方法与应用技术的研究。E-mail:kanruifeng@aiofm.ac.cn KAN Rui-feng, E-mail:kanruifeng@aiofm.ac.cn
- 基金信息：
  
  中国科学院科技创新基金资助项目(CXJJ-16M267);国家自然科学基金青年科学基金资助项目(11602292)
- DOI：10.3788/OPE.20182608.1862
  中图分类号： O433.1;O657.38
- 收稿日期：2018-04-09，
  
  录用日期：2018-6-13，
  
  纸质出版日期：2018-08-25
- 稿件说明：
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聂伟, 许振宇, 阚瑞峰, 等. 可调谐二极管激光吸收光谱技术测量低温流场水汽露点温度[J]. 光学精密工程, 2018,26(8):1862-1869.

Wei NIE, Zheng-yu XU, Rui-feng KAN, et al. Measurement of low water vapor dew-point temperature based on tunable diode laser absorption spectroscopy[J]. Optics and precision engineering, 2018, 26(8): 1862-1869.
聂伟, 许振宇, 阚瑞峰, 等. 可调谐二极管激光吸收光谱技术测量低温流场水汽露点温度[J]. 光学精密工程, 2018,26(8):1862-1869. DOI： 10.3788/OPE.20182608.1862.

Wei NIE, Zheng-yu XU, Rui-feng KAN, et al. Measurement of low water vapor dew-point temperature based on tunable diode laser absorption spectroscopy[J]. Optics and precision engineering, 2018, 26(8): 1862-1869. DOI： 10.3788/OPE.20182608.1862.

摘要

露点温度是表征气体状态的一个重要参数，针对低温环境的低露点温度精确、快速、连续、原位测量的迫切需要，提出了可调谐二极管激光吸收光谱（TDLAS）技术对水汽露点温度测量的方案。首先与安徽省气象局的冷镜式露点仪一起对比测量标准温湿度箱内的露点温度，验证波长为1 381 nm的TDLAS系统露点温度测量的可行性及精度，然后结合一套开放式的测量装置，进行低温度环境（最低温度100 K）水汽露点温度原位测量。得到了实时的露点温度值，其中TDLAS露点测量结果与冷镜式露点仪测量结果一致性较好（相差小于1 K），TDLAS测量的时间分辨率为0.83 s，远远快于冷镜式露点仪的时间响应速度。对于更低气体温度的露点测量，获得了与气体温度变化趋势相同的露点温度，同时得到了随着环境温度降低，水汽逐渐趋向饱和的结论。

Abstract

The dew-point temperature is an important parameter of gas. Moreover

there is an urgent need for developing techniques that can facilitate the accurate

rapid

continuous

and direct measurement of low dew point temperatures. In this regard

an approach based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) was developed. Firstly

our TDLAS hygrometer was compared with a chilled mirror hygrometer at Anhui Provincial Meteorological Bureau. Secondly

a free-path measurement apparatus was designed with an optical pathlength of approximately 3.8 m

and it was used to directly measure very low dew-point temperatures in a cryogenic chamber. Dew-point temperatures were obtained by standard formula. The results from TDLAS were compared with chilled mirror hygrometer.The maximum deviation is less than 1 K. In addition

the time resolution of the TDLAS system was determined to be approximately 0.83 s

which is shorter than the chilled mirror hygrometer.Through this experiment

we demonstrated that TDLAS technology was feasible to measure dew-point temperature at low temperatures.

关键词

Keywords

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