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可调谐二极管激光吸收光谱技术测量气体浓度时，由于测量氛围温度变化的影响引起解调的二次谐波信号发生变化，最终导致浓度测量的较大误差. 为了修正温度变化对浓度反演结果的影响，适应工业测量、燃烧诊断的需要，采用通过实验所得温度关系的数值拟合修正方法即经验公式修正和根据HITRAN数据库参数的理论关系即理论公式修正两种方法进行分析与讨论. 实验中采用在50 cm长的高温管式炉中通入高温安全的21%浓度的 氧气为目标测定气体，选定760.77 nm的中心吸收波长，测量了温度变化范围为300–900 K，间隔50 K的情况下所得到的谐波信号，并利用一次谐波比值消元法消除光强波动影响后的结果，得出了不同温度下未修正的原始浓度值和通过修正方法后的修正值. 实验结果表明所述的经验公式和理论公式两种修正方法对温度影响都有一定的抑制作用，可以应用到温度变化引起的气体浓度误差修正监测中，为下一步开展燃烧诊断实时在线监测提供了依据.
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关键词:
- 可调谐二极管激光吸收光谱 (TDLAS) /
- 温度修正 /
- 经验公式 /
- 理论公式
Tunable diode laser absorption spectroscopy (TDLAS) is often used to detect gas concentrations in many fields. But because of the variation of ambient temperature, the measured harmonic signal amplitudes are affected and may lead to the monitoring errors. The impact of temperature on the measurement as well as the temperature compensation method is emphasized. So in order to modify the inversion results and adapt industrial measurement, combustion diagnostics, the numerical fitting empirical modified equation and theoretical modified equation from HITRAN database are discussed and compared in this paper. In experiment, the 21% oxygen as the safety monitoring gas and absorption wavelength at 760.77 nm are employed. Meanwhile, the first harmonic signals are also used to decrease the laser intensity fluctuations. We thus obtained the unmodified and modified results with the tube furnace in the temperature range 300–900 K (interval 50 K). Experimental results show that these two modified methods have some effective influence on the temperature changes and can be applied to gas monitoring correction to improve the accuracy and feasibility of the TDLAS technology. In addition, the methods also provide evidence for the real-time gas monitoring in the application of combustion diagnosis.-
Keywords:
- tunable diode laser absorption spectroscopy /
- temperature compensation /
- empirical equation /
- theoretical equation
[1] Wienhold F G, Fischer H, Hoor P, Wagner V, Königstedt R, Harris G W, Anders J, Grisar R, Knothe M, Riedel W J, Lbken F J, Schilling T 1998 Appl. Phys. B 67 411
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[7] Kan R F, Liu W Q, Liu J G, Zhang Y J, Dong F Z, Gao S H, Wang M, Chen J 2005 Acta Phys. Sin. 54 1927 (in Chinese) [阚瑞峰, 刘文清, 刘建国, 张玉钧, 董凤忠, 高山虎, 王敏, 陈军 2005 54 1927]
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[10] Xu Z Y, Liu W Q, Liu J G, He J F, Yao L, Ruan J, Chen J Y, Li H, Yuan S, Geng H, Kan R F 2012 Acta Phys. Sin. 61 234204 (in Chinese) [徐振宇, 刘文清, 刘建国, 何俊峰, 姚路, 阮俊, 陈玖英, 李晗, 袁松, 耿辉, 阚瑞峰 2012 61 234204]
[11] Song J L, Hong Y J, Wang G Y, Pan H 2012 Acta Phys. Sin. 61 240702 (in Chinese) [宋俊玲, 洪延姬, 王广宇, 潘虎 2012 61 240702]
[12] Shu X W, Zhang Y J, Kan R F, Cui Y B, He Y, Zhang S, Geng H, Liu W Q 2010 Spectroscopy and Spectral Analysis 30 1352 (in Chinese) [束小文, 张玉钧, 阚瑞峰, 崔益本, 何莹, 张帅, 耿辉, 刘文清 2010 光谱学与光谱分析 30 1352]
[13] Zhao Y J, Wei Y B, Li Y F, Zhang T T, Wang C, Liu T Y 2012 Proceedings of the 22nd International Conference on Optical Fiber Sensors Proc. of SPIE Beijing, China, October 15–19, 2012 p8421AP-1
[14] L X J, Weng C S, Li N 2012 Acta Phys. Sin. 61 234205 (in Chinese) [吕晓静, 翁春生, 李宁 2012 61 234205]
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[16] Zhang Z R, Dong F Z, Wang Y, Wu B, Pang T, Xia H, Tu G J 2010 Proceedings of the Advanced Sensor Systems and Applications Proc. of SPIE Beijing, China, October 18–20, 2010 p785313-1
[17] Zhang Z R, Dong F Z, Wang Y, Pang T, Wu B, Tu G J, Xia H, Ni Z B, Yang Y, Xu M M 2010 Acta Optica Sinica. 31 s100304 (in Chinese) [张志荣, 董凤忠, 王煜, 庞涛, 吴边, 涂郭结, 夏滑, 倪志波, 杨阳, 徐明明 2010 光学学报 31 s100304]
[18] Iseki T 2003 Opt. Rev. 10 24
[19] Guan C, Qu Y 2012 Laser & Infrared 42 36 (in Chinese) [贯从, 曲艺 2012 激光与红外 42 36]
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[1] Wienhold F G, Fischer H, Hoor P, Wagner V, Königstedt R, Harris G W, Anders J, Grisar R, Knothe M, Riedel W J, Lbken F J, Schilling T 1998 Appl. Phys. B 67 411
[2] Che L, Ding Y J, Peng Z M, Li X H 2012 Chin. Phys. B 21 127803
[3] Bolshov M A, Kuritsyn Y A, Liger V V, Mironenko V R, Leonov S B, Yarantsev D A 2010 Appl. Phys. B 100 397
[4] Li H, Farooq A, Jeffries J B, Hanson R K 2007 Appl. Phys. B 89 407
[5] Zhang L, Liu J G, Kan R F, Liu W Q, Zhang Y J, Xu Z Y, Chen J 2012 Acta Phys. Sin. 61 034214 (in Chinese) [张亮, 刘建国, 阚瑞峰, 刘文清, 张玉钧, 许振宇, 陈军 2012 61 034214]
[6] Wang F, Huang Q X, Li N, Yan J H, Chi Y, Ceng K F 2007 Acta Phys. Sin. 56 3867 (in Chinese) [王飞, 黄群星, 李宁, 严建华, 池涌, 岑可法 2007 56 3867]
[7] Kan R F, Liu W Q, Liu J G, Zhang Y J, Dong F Z, Gao S H, Wang M, Chen J 2005 Acta Phys. Sin. 54 1927 (in Chinese) [阚瑞峰, 刘文清, 刘建国, 张玉钧, 董凤忠, 高山虎, 王敏, 陈军 2005 54 1927]
[8] Dong F Z, Liu W Q, Liu J G, Tu X H, Zhang Y J, Qi F, Xie P H, Lu Y H, Wang S M, Wang Y P, Wei Q N 2005 Jou. Test & Mea. Tec. 19 119 (in Chinese) [董凤忠, 刘文清, 刘建国, 涂兴华, 张玉钧, 齐峰, 谢品华, 陆亦怀, 汪世美, 王亚萍, 魏庆农 2005 测试技术学报 19 119]
[9] Dong F Z, Liu W Q, Liu J G, Tu X H, Zhang Y J, Qi F, Xie P H, Lu Y H, Wang S M, Wang Y P, Wei Q N 2005 Jou. Test & Mea. Tec. 19 237 (in Chinese) [董凤忠, 刘文清, 刘建国, 涂兴华, 张玉钧, 齐峰, 谢品华, 陆亦怀, 汪世美, 王亚萍, 魏庆农 2005 测试技术学报 19 237]
[10] Xu Z Y, Liu W Q, Liu J G, He J F, Yao L, Ruan J, Chen J Y, Li H, Yuan S, Geng H, Kan R F 2012 Acta Phys. Sin. 61 234204 (in Chinese) [徐振宇, 刘文清, 刘建国, 何俊峰, 姚路, 阮俊, 陈玖英, 李晗, 袁松, 耿辉, 阚瑞峰 2012 61 234204]
[11] Song J L, Hong Y J, Wang G Y, Pan H 2012 Acta Phys. Sin. 61 240702 (in Chinese) [宋俊玲, 洪延姬, 王广宇, 潘虎 2012 61 240702]
[12] Shu X W, Zhang Y J, Kan R F, Cui Y B, He Y, Zhang S, Geng H, Liu W Q 2010 Spectroscopy and Spectral Analysis 30 1352 (in Chinese) [束小文, 张玉钧, 阚瑞峰, 崔益本, 何莹, 张帅, 耿辉, 刘文清 2010 光谱学与光谱分析 30 1352]
[13] Zhao Y J, Wei Y B, Li Y F, Zhang T T, Wang C, Liu T Y 2012 Proceedings of the 22nd International Conference on Optical Fiber Sensors Proc. of SPIE Beijing, China, October 15–19, 2012 p8421AP-1
[14] L X J, Weng C S, Li N 2012 Acta Phys. Sin. 61 234205 (in Chinese) [吕晓静, 翁春生, 李宁 2012 61 234205]
[15] Rothman L S, Gordon I E, Barbe A, Benner, Chris D, Bernath P F, Birk M, Boudon V, Brown L R, Campargue A, Champion J P, Chance K, Coudert L H, Dana V, Devi V M, Fally S, Flaud J M, Gamache R R, Goldman A, Jacquemart D, Kleiner I, Lacome N, Lafferty W J, Mandin J Y, Massie S T, Mikhailenko S N, Miller C E, Moazzen-Ahmadi N, Naumenko O V, Nikitin A V, Orphal J, Perevalov V I, Perrin A, Predoi-Cross A, Rinsland C P, Rotger M, Šimečková M, Smith M A H, Sung K, Tashkun S A, Tennyson J, Toth R A, Vandaele A C, Vander Auwera J 2009 J. Quant. Spectrosc. Radiat. Transfer. 110 533
[16] Zhang Z R, Dong F Z, Wang Y, Wu B, Pang T, Xia H, Tu G J 2010 Proceedings of the Advanced Sensor Systems and Applications Proc. of SPIE Beijing, China, October 18–20, 2010 p785313-1
[17] Zhang Z R, Dong F Z, Wang Y, Pang T, Wu B, Tu G J, Xia H, Ni Z B, Yang Y, Xu M M 2010 Acta Optica Sinica. 31 s100304 (in Chinese) [张志荣, 董凤忠, 王煜, 庞涛, 吴边, 涂郭结, 夏滑, 倪志波, 杨阳, 徐明明 2010 光学学报 31 s100304]
[18] Iseki T 2003 Opt. Rev. 10 24
[19] Guan C, Qu Y 2012 Laser & Infrared 42 36 (in Chinese) [贯从, 曲艺 2012 激光与红外 42 36]
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