Spectroscopy and Spectral Analysis, Volume. 38, Issue 5, 1476(2018)
An UV Imaging Methods Applicable to the Two-Dimensional Spatial Distribution of Pollutant Concentration
A new type of ultraviolet imaging method is introduced, it is useful to specific pollution gas in the pollution sources. The method is based on Lambert-Bill absorption law and reproduces the two-dimensional distribution of pollutant concentration in space with high temporal and spatial resolution by using an ultraviolet band pass filter. The measurement system is built in the laboratory to detect SO2, the measuring method about imaging technology is set forth, and the linear response and sensitivity in regard to that is analyzed. The results show that the linear response is positive and the response coefficient is as high as 0985. The sensitivity of different imaging area changes, the difference is between 1%~3%. At the same time, the accuracy of this method is discussed to get accurate SO2 column density, the result in the laboratory shows that the error about the method is around 1% and the accuracy is higher. At last, the detection limit of the method is analyzed and the space distribution of the target gas SO2 on cross section in the sample pool is parsed according to the linear least squares fitting method.
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ZHANG Ying-hua, LI Ang, XIE Pin-hua, XU Jin, HU Zhao-kun, WU Feng-cheng, QIN Min, FANG Wu. An UV Imaging Methods Applicable to the Two-Dimensional Spatial Distribution of Pollutant Concentration[J]. Spectroscopy and Spectral Analysis, 2018, 38(5): 1476
Received: May. 16, 2017
Accepted: --
Published Online: Jun. 1, 2018
The Author Email: Ying-hua ZHANG (yhzhang@aiofm.ac.cn)