导数光声光谱信号处理过程中两端失真问题探讨  

DISCUSSION ABOUT DISTORTION OF THE TWO EDGES OF SIGNAL DISPOSING IN DIFFERENTIAL PHOTOACOUSTIC SPECTROSCOPY

作　　者：汪洁[1] 唐志列[1] 梁瑞生[2] 刘景峰[1] 陈志新[1] 魏正军[1] 

机构地区：[1]华南师范大学物理学系,广东广州510631 [2]华南师范大学信息光电子科技学院,广东广州510631

出　　处：《华南师范大学学报（自然科学版）》2003年第3期75-79,共5页Journal of South China Normal University(Natural Science Edition)

基　　金：广东省自然科学基金资助项目(980046)

摘　　要：探索导数光声光谱信号处理过程中两端失真的问题,以原信号处理程序为基础编写了一套检验程序.经实验检验和理论分析,认为产生两端失真的主要原因出现在对信号的拟合阶段,这个误差很小,一般在图象上不易观察,不会引起人们的注意,而求导则将这一点点误差放大,进一步证明了导数光谱法的高灵敏度.Differential photoacoustic spectroscopy(PAS) is a highly sensitive and resolutive technique. The question about some distortion at the two edges of signal disposing in the PAS was discussed in the paper. And the testing program was made, based on the signal disposing program. The distortion taking place in the phase of simulation was presented after having tested and analysed.The error is very little and can not be found easily, but it was magnified byderivation. Furthermore the high sensibility of the PAS was proved convincingly.

关 键 词：导数光声光谱 信号处理 两端失真 光声光谱 导数光谱 信号拟合 

分 类 号：O433.1[机械工程—光学工程]