激光诱导击穿光谱元素谱线自动识别方法研究  

Study on the Automatic Recognition Method of Elemental Spectra in Laser Induced Breakdown Spetroscopy

作　　者：刘立拓[1] 刘建国[1] 赵南京[1] 鲁翠萍[1] 陈东[1] 石焕[1] 王春龙[1] 张玉钧[1] 刘文清[1] 

机构地区：[1]中国科学院环境光学与技术重点实验室,中国科学院安徽光学精密机械研究所,安徽合肥230031

出　　处：《光谱学与光谱分析》2012年第1期20-24,共5页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(60908018);国家重大科技专项(2008ZX07527,2009ZX07420);中国科学院知识创新工程重大项目(kzcx-1yw06-01);安徽省科技计划项目(083H3b1581)资助

摘　　要：根据激光诱导击穿光谱谱线展宽机制,对NIST标准谱线数据库中的发射谱线进行了模拟,并与实验光谱进行对比,在对比分析中引入相似性测度,得到模拟光谱和实验光谱的相似程度。对元素谱线的自动归属识别方法进行分析和研究,通过相似性计算对土壤样品340～345nm波段光谱进行了识别分析,利用最小二乘原理计算各谱线之间的比例系数,实现了光谱识别,实验结果验证了基于相似性测度的光谱识别方法的可行性及其自动识别的优越性。According to the spectral line broadening mechan ism of laser induced breakdown spectroscopy,the emission lines from the standar d spectral database of NIST were simulated,and they were compared with the spec tral data of experiment.In the process of comparison similarity measure was use d to measure the similarity between the simulative spectra and the experimental spectra.The automatic recognition method of elemental spectra was studied,and the spectral data of soil between 340 and 345 nm was recognized by computing the proportional coefficients of the spectral lines Using principle of nonlinear le ast squares,the recognition process was completed.The feasibility and the adva ntage of the method were proved by the results of experiment.

关 键 词：激光诱导击穿光谱 模拟光谱 相似性测度 谱线识别 谱线展宽 

分 类 号：O433.5[机械工程—光学工程] O241.5[理学—光学]