| 激光诱导击穿光谱元素谱线自动识别方法研究 |
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| 作者姓名： | Liu LT Liu JG Zhao NJ Lu CP Chen D Shi H Wang CL Zhang YJ Liu WQ |
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| 作者单位： | 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 |
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| 基金项目： | 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 |
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| 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。
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| 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 |
Study on the automatic recognition method of elemental spectra in laser induced breakdown spetroscopy |
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| Liu LT,Liu JG,Zhao NJ,Lu CP,Chen D,Shi H,Wang CL,Zhang YJ,Liu WQ.Study on the automatic recognition method of elemental spectra in laser induced breakdown spetroscopy[J].Spectroscopy and Spectral Analysis,2012,32(1):20-24. |
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| Authors: | Liu Li-tuo Liu Jian-guo Zhao Nan-jing Lu Cui-ping Chen Dong Shi Huan Wang Chun-long Zhang Yu-jun Liu Wen-qing |
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| Institution: | Key Laboratory of Environment Optics & Technology, Institute of Anhui Optics Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China. ltuoliu@aiofm.ac.cn |
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| Abstract: | According to the spectral line broadening mechanism of laser induced breakdown spectroscopy, the emission lines from the standard spectral database of NIST were simulated, and they were compared with the spectral data of experiment. In the process of comparison similarity measure was used 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 least squares, the recognition process was completed. The feasibility and the advantage of the method were proved by the results of experiment. |
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| Keywords: | Laser induced breakdown spectroscopy Si mulative spectra Similarity measure Spectral line recognition Spectral lin e broadening |
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