【作者】 张宁宁；

【导师】 冯克成； 杨思泽；

【作者基本信息】 长春理工大学 ， 物理电子学， 2007， 硕士

【摘要】 大气污染破坏生态系统对人体健康造成极大的危害。为了防治大气污染，首先要对各种污染气体进行监测。本论文研究了在一段距离内，对大气中的有毒气体进行空气质量连续监测的实时在线监测，它的测量范围可从数百米到数公里，可以反映一个区域的平均污染程度，不需要多点取样，监测结果比单点监测更具代表性。重点对差分吸收光谱技术(DOAS)用于监测污染气体进行研究。详细分析了差分吸收方法，并进行了数值模拟计算分析，并且参考大量权威机关安徽光机所的实验流程，在拟合反演算法应用了混合最小二乘法，利用该方法能简化反演算法的计算过程，并且得到的浓度反演数值和结果相符合。说明该方法有很高的精度，是可行的。更多还原

【Abstract】 Air pollution destroys ecological condition and does great harm to human beings. To prevent air pollution, monitoring of polluted gases’ concentrations is needed to be done firstly. Our research emphasizes on how to utilize the technique of differential optical absorption spectroscopy (DOAS) in the system. The results show that it has a relatively high accuracy. The method has been applied to monitor the seasonal variation of the column amounts of the pollution air. We evaluated the system by experiments. We established an experimental setting for the evaluation. The reproducibility, accuracy and linearity of the system were detected on the setting by testing standard gases with known compared with another instrument of the same kind. It showed that the test results of our system were close to those of international advanced instrument of the same kind. At last, we discussed how the error was produced and how to eliminate it.更多还原