变温条件下水蒸气激光检测浓度反演及修正

doi:10.11949/0438-1157.20200670

化工学报 ›› 2020, Vol. 71 ›› Issue (S2): 161-165.DOI: 10.11949/0438-1157.20200670

变温条件下水蒸气激光检测浓度反演及修正

李鹏¹(),王迪²(),李品烨³,吕妍²

^1.新疆油田公司实验检测研究院，新疆克拉玛依 834000
^2.东北石油大学电子科学学院，黑龙江大庆 163318
^3.东北石油大学土木建筑工程学院，黑龙江大庆 163318

收稿日期:2020-05-29 修回日期:2020-06-18 出版日期:2020-11-06 发布日期:2020-11-06
通讯作者: 王迪
作者简介:李鹏（1984—），男，硕士，2197693900@qq.com
基金资助:
大庆市指导性科技项目(zd-2019-04);东北石油大学引导性创新基金项目(2018YDL-07);黑龙江省教育厅成果研发培育项目(TSTAU-R2018020);东北石油大学优秀科研人才培育基金项目(SJQHB201801);中国石油科技创新基金研究项目(2018D-5007-0608)

Inversion and correction of water vapor concentration detected by laser at variable temperature

Peng LI¹(),Di WANG²(),Pinye LI³,Yan LYU²

^1.Xinjiang Oilfield Company Experimental Testing Institute, Karamay 834000, Xinjiang, China
^2.School of Electronic Science, Northeast Petroleum University, Daqing 163318, Heilongjiang, China
^3.School of Civil Engineering and Architecture, Northeast Petroleum University, Daqing 163318, Heilongjiang, China

Received:2020-05-29 Revised:2020-06-18 Online:2020-11-06 Published:2020-11-06
Contact: Di WANG

摘要/Abstract

摘要：

基于激光吸收光谱技术的气体浓度检测手段具有非接触、响应迅速和灵敏度高等优势，但在检测过程中气体对激光的吸收能力易受温度变化的影响导致浓度测量结果偏差增大。以水蒸气为研究对象，搭建了基于直接吸收光谱法的非常温条件（373～393 K）水蒸气浓度检测平台，提出了基于直接吸收光谱法的浓度反演修正方法。结果表明：修正后浓度测量值反演误差由原来最高35%降低至0.9%～3.5%范围内。

关键词: 可调谐半导体激光吸收光谱, 激光检测, 线强, 温度修正

Abstract:

The gas concentration detection method based on laser absorption spectrum technology has the advantages of non-contact, rapid response and high sensitivity. However, on-line detection of industrial gas by laser spectroscopy is susceptible to temperature changes, resulting in an increase in concentration measurement deviation. In this paper, an experimental platform for water vapour laser detection at various temperatures (373—393 K) is built. The gas concentration is inverted by direct absorption method. The mechanism of temperature effect on the absorption spectroscopy characteristics of ammonia is explored, and a new method is proposed to correct the inversion concentration at various temperatures. The results show that the inversion error of concentration measurement value is reduced from 35% to 0.9%—3.5%.

Key words: tunable diode laser absorption spectroscopy, laser detection, line intensity, temperature correction

中图分类号:

O 433.1

李鹏, 王迪, 李品烨, 吕妍. 变温条件下水蒸气激光检测浓度反演及修正[J]. 化工学报, 2020, 71(S2): 161-165.

Peng LI, Di WANG, Pinye LI, Yan LYU. Inversion and correction of water vapor concentration detected by laser at variable temperature[J]. CIESC Journal, 2020, 71(S2): 161-165.

图/表 4

图1 实验装置

Fig.1 Experimental setup

图2 变温条件下3%浓度水蒸气激光检测原始信号

Fig.2 Original signal of 3% water vapor at variable temperature

图3 变温条件下3%浓度水蒸气光谱吸光度

Fig.3 Spectral absorbance of 3% water vapor at variable temperature

图4 变温条件下3%浓度水蒸气测量浓度及误差

Fig.4 Measurement concentration and test error of 3% water vapor at variable temperature

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变温条件下水蒸气激光检测浓度反演及修正

Inversion and correction of water vapor concentration detected by laser at variable temperature

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