基于红外技术的气体浓度检测方法研究

依据Lambert-Beer定律, 推导出检测气体浓度的数学模型, 得出了测量和参考探测器输出电压与气体浓度的函数表达式, 表达式中的二个常数的数值取决于气室长度、气体吸收系数、探测器的电压探测率, 经零点和满量程标准气样的标定, 可确定这二个常数的数值, 实现对仪器的标定.根据仪器零点随温度变化的关系, 得到零点与温度函数表达式, 用于零点温度补偿以及对零点温度补偿系数的计算;量程温度补偿方法是通过引入量程温度补偿因子, 对测量和参考探测器输出电压与气体浓度的函数表达式进行修正, 修正后的函数表达式用于量程温度补偿, 也能对量程温度补偿因子中的补偿系数进行计算.矿用红外甲烷传感器采用本文的标定方法和温度补偿方法, 在不同的环境温度下, 对标准气样进行检测, 其检测结果符合红外甲烷传感器标准所规定的基本误差.

Abstract

According to the Lambert-Beer law,we derived mathematical model to measure the target gas concentration,and deduced the function which could be used for characterizing the relationship of the output voltage of the two detectors and the target gas concentration.The aim of calibration process is to determine the values of those two constants which depend on the length of the chamber,the gas absorption coefficient and the detector voltage detectivity in the above expression.Secondly,according to the feature of the measurements’ zero point changes with current temperature,the relationship between zero point and temperature was formulated.It can be used for zero temperature compensation and correlation of coefficient calculation.The scale temperature compensation method is the way to revise the function expression of the output voltage of the two detectors and the target gas concentration by introducing scale temperature compensation factor.The corrected function expression is used for compensating scale temperature and calculating the compensation coefficient of scale temperature compensation.Finally,the calibration and temperature compensation method above was applied to coal mine non-dispersive infrared methane transducer and the test results of standard gas samples testing under various ambient temperatures conform to the requirements in infrared methane sensor standard.

参考文献

[1] 刘永平.红外技术在煤矿井下测温和测气中的应用［J］.红外技术,2000,22(4): 59-62.

LIU Yong-ping.The application of infrared technology in monitoring the temperature and gas in the coal mines［J］.Infrared Technology,2000,22(4): 59-62.

[2] 刘永平,黄存新.矿用红外气体传感器的结构及光学系统的设计与实现［J］.硅酸盐通报,2009,28(2): 400-404.

LIU Yong-ping,HUANG Cun-xin.The structure and optical system design of mining infrared gas sensor［J］.Bulletin of the Chinese Ceramic Society,2013,24(2): 012004.

[3] 于鑫,高宗丽,宋楠,等.袖珍式红外瓦斯检测仪的设计与实验［J］.光子学报,2014,43(1): 58-63.

YU Xin,GAO Zong-li,SONG Nan,et al.Design and experiment of pocket Infrared gas detecter［J］.Acta Photonica Sinica,2014,43(1): 58-63.

[4] JANE H,RALPH P T.Optical gas sensing: a review［J］.Measurement Science and Technology,2013,24(1): 012004.

[5] CROWDER J G,HARDAWAY H R and ELLIOTT C T.Mid-infrared gas detection using optically immersed,room-temperature,semiconductor devices［J］.Measurement Science and Technology,2002,13(6): 882-884.

[6] ALEKSANDROV S,GAVRILOV G,KAPRALOV A,et al.Portable optoelectronic gas sensors operating in the mid-IR spectral range (λ =3-5 μm)［C］.SPIE,2002,4680: 188-194.

[7] FONOLLOSA J,RUBIO R,HARTWIG S,et al.Design and fabrication of silicon-based mid infrared multi-lenses for gas sensing applications［J］.Sensors and Actuators B,2008,132(2): 498-507.

[8] 刘永平,郭世寨,董康宁, 等.矿用红外甲烷传感器的研制［J］.煤矿现代化,2009,93(6): 67-70.

LIU Yong-ping,GUO Shi-zhai,DONG Kang-ning,et al.Research and manufacture of mine-used infrared methane transducer［J］.Coal Mine Modernization,2009,93(6): 67-70.

[9] 张显杰,余震虹,李蓉蓉,等.基于红外检测的甲烷传感器中光谱吸收理论的研究［J］.红外技术,2014,36(6): 508-511.

ZHANG Xian-jie,YU Zhen-hong,LI Rong-rong,et al.Study of spectrum absorption about CH4 sensor based on the infrared detection method［J］.Infrared Technology,2014,36(6): 508-511.

[10] 王森.在线分析仪器手册［M］.刘哲,宋辉,等.北京: 化学工业出版社,2008: 39-41.

[11] ROTHMAN L S,GORDONET I E,BABIKOV Y,et al.The HITRAN2012 molecular spectroscopic database［J］.Journal of Quantitative Spectroscopy & Radiative Transfer,2013,130(1): 4-50.

[12] 王琢,曹家年,张可可,等.光学式低浓度甲烷气体传感器的研究［J］.光子学报,2011,40(2): 255-256.

WANG Zhuo,CAO Jia-nian,ZHANG Keke,et al.Optical low-concentration methane gas sensor［J］.Acta Photonica Sinica,2011,40(2): 255-256.

[13] 刘永平,张军利,靖立涛,等.双光源双探测器红外气体检测技术的研究［J］.煤矿现代化,2013,115(4): 74-76.

LIU Yong-ping,ZHANG Jun-li,JING Li-tao,et al.Research on infrared gas detection technology using dual-source and dual detector［J］.Coal Mine Modernization,2013,115(4): 74-76.

[14] PETER W,FRANZ S,KARL M,et al.Near- and mid-infrared laser-optical sensors for gas analysis［J］.Optics and Lasers in Engineering,2002,37(2-3): 101-114.

[15] AQ 6211-2008,煤矿用非色散红外甲烷传感器［S］.北京: 煤炭工业出版社,2009.

刘永平, 王霞, 李帅帅, 胡玲. 基于红外技术的气体浓度检测方法研究[J]. 光子学报, 2015, 44(1): 0112002. LIU Yong-ping, WANG Xia, LI Shuai-shuai, HU Ling. Gas Concentration Detection Method Based on Infrared Absorption Spectroscopy Technology[J]. ACTA PHOTONICA SINICA, 2015, 44(1): 0112002.

基于红外技术的气体浓度检测方法研究

关于本站 Cookie 的使用提示

全站搜索

基于红外技术的气体浓度检测方法研究

相关论文

相关资讯

关于本站 Cookie 的使用提示

全站搜索