1. State Key Lab of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China 2. College of Physics & Electronic Information，Tianjin Normal University, Tianjin 300387, China 3. Tianjin Lancer Science & Technology Development Company, Tianjin 300382, China
Abstract：Nondispersive infrared absorption spectroscopy(NDIR) is an important method to measure CO concentration in the air. In the present study, an open-path measurement system and continuous measuring device was developed, and genetic programming was used to establish the calibration model of subjects’ light intensity sampling values. Continuous measurements were carried out in 10 different concentration of CO, and 40 sampled data were acquired and analyzed. For validation set, the correlation coefficient was 0.999 7. The biggest relative error of validation was 4.00%, and the average relative error was 1.11%. Results show that genetic programming can be a good method for the modeling of gas concentration measurements equipped with NDIR systems.
[1] Platt U, Perner D, Patz H W. Journal of Geophysical Research, 1979, 84(10): 6329. [2] Platt U, Perner D. Journal of Geophysical Research, 1980, 85(12): 7453. [3] Lee J S, Kim Y J, Kuk B J, et al. Environmental Monitoring and Assessment, 2005, 104: 281. [4] Namjou K, Roller C B, Reich T E, et al. Applied Physics B, 2006, 85: 427. [5] Gardiner T, Mead M I, Garcelon S, et al. Review of Scientific Instruments, 2010, 81: 083102. [6] Frish M B, Wainner R T, Laderer M C, et al. IEEE Sensors Journal, 2010, 10(3): 639. [7] SI Fu-qi, LIU Jian-guo, LIU Wen-qing, et al(司福棋, 刘建国, 刘文清, 等). Chinese Journal of Quantum Electronics(量子电子学报), 2004, 21(4): 425. [8] Chaloulakou A，Mavroidis I. Atmospheric Environment, 2002, 36: 1769. [9] LI Meng-lin, DUAN Fa-jie, OUYANG Tao, et al(李孟麟, 段发阶, 欧阳涛, 等). Process Automation Instrumentation(自动化仪表), 2008, 28(10): 2214. [10] CHEN Xiao-ning, LIU Jian-guo, SI Fu-qi, et al(陈晓宁, 刘建国, 司福祺, 等). Opto-Electronic Engineering(光电工程), 2008, 35(4): 49. [11] ZHOU Ai-min, CAO Hong-qing, KANG Li-shan, et al(周爱民, 曹宏庆, 康立山 等). Journal of System Simulation(系统仿真学报), 2003, 15(6): 797. [12] LI Kang-shun, LI Yuan-xiang, TANG Ming-duan, et al(李康顺, 李元香, 汤铭端, 等). Journal of System Simulation(系统仿真学报), 2005, 17(7): 1597. [13] ZHANG Yong-qiang, CHEN Hua-shan(张永强，陈华珊). Computer Engineering(计算机工程), 2007, 33(7): 75.
