ZHANG Jing, LIU Jian-guo, ZHAO Xin, et al. Design of a high sensitivity fast response CO2/water vapor analyzer[J]. 2013, 32(4): 121-124. DOI: 10.13873/j.1000-97872013.04.023.
CO2 and water vapor flux is an important characteristic parameters of global carbon cycle and water cycle.The difficulty of measuring CO2 and water vapor flux is the need of high precision
fast frequency response gas sensor.A non-dispersive infrared CO2/water vapor analyzer
based on DSP and CPLD as the core control and processing module
is developed.Compared with standard gas
relative deviation of CO2 is 1.638 mg/m3
the precision can reach 1×10-6;relative deviation of water vapor is 5.39 mg/m3
the precision can reach 10×10-6.By comparative experiment
the concentration is consistent with commercial instruments.The result shows that the CO2/water vapor analyzer can accurately measure CO2 and water vapor concentration.