1. State Key Lab of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China 2. Key Laboratory of Micro-Opto-Electro-Mechanical System Technology, Tianjin University, Ministry of Education, Tianjin 300072, China 3. College of Quality & Technical Supervision, Hebei University, Baoding 071002, China 4. School of Mechanical Engineering, Hebei University of Technology, Tianjin 300130, China
Abstract：The accuracy of the measurement results will be influenced by the ambient temperature in the real-time monitoring based on Differential Optical Absorption Spectroscopy (DOAS). A novel method to improve the temperature robustness of DOAS technology is adopted by two-dimensional correlation spectroscopy technology. Two-dimensional correlation is used to analyse the SO2 absorption cross section at different temperatures. The diagonal slices of synchronization correlation spectroscopy which come from dynamic absorption cross section are obtained. The wavelength 300.5～310 nm is used as the preferred inversion wavelength range based on the slices. The field measurement results and reference value are compared. Results show that the 24-hour average measurement error is 22.5% at 290～310 nm and that at 300.5～310 nm is 9.9%. The correlation coefficients are 0.949 6 and 0.780 8, respectively. Two-dimensional correlation DOAS technology can be applied to enhance the robustness of temperature, and to improve the accuracy of the measurement results.
李红莲1, 2, 3，魏永杰4，吕传明1, 2，陈文亮1, 2* . 应用二维相关提高DOAS技术的温度鲁棒性 [J]. 光谱学与光谱分析, 2013, 33(09): 2383-2386.
LI Hong-lian1, 2, 3, WEI Yong-jie4, Lü Chuan-ming1, 2, CHEN Wen-liang1, 2* . Improving the Temperature Robustness of the DOAS Based on Two-Dimensional Correlation Spectroscopy Technology. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(09): 2383-2386.
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