关键词: 红外光谱, 修正Beer-Lambert定律, 校准

Abstract:

In recent years, Pollution of water in China is serious, it is of great significance to establish a water eco-environmental sensing system, which includes the detection of CO2 concentration on the surface of the water body, for the protection of aquatic ecological environment. Current detection modes are electrochemical method, gas chromatography, etc. But the accuracy of these detection methods is not high, and these methods with short life are susceptible to interference, cannot meet the detection requirements in complex environment. So in this paper, we design a CO2 concentration detection system based on infrared spectroscopy-absorption. Finally, we calibrate the designed system according to modified Beer-Lambert law. Finally,the system function and performance test show that the design system and the traditional method, improve the efficiency and accuracy of detection.

Key words: infrared spectroscopy;modified Beer Lambert law;calibration