液态钢成分的LIBS实时定量分析技术研究

项目名称： 液态钢成分的LIBS实时定量分析技术研究

项目编号： No.61271402

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 马翠红

作者单位： 河北联合大学

项目金额： 70万元

中文摘要： 本课题结合激光诱导击穿光谱(LIBS)技术，对液态钢的成分进行实时定量分析研究，主要工作如下：(1)构建基于LIBS技术的液态钢成分实时分析平台，对激光与液态钢相互作用的机制进行研究，得出液态钢等离子体从产生到湮灭过程各阶段中谱线的形成机制及影响因素，基体效应和自吸收效应的影响机制和校正方法，为LIBS液态钢成分在线检测提供理论基础。(2)构建实用有效的液态钢LIBS光谱数据预处理方法与模型，剔除异常光谱数据，滤除噪声，进行基线校正、自动寻峰和重叠峰分解。(3)分析元素激发、电离特性等对等离子体的影响，优化实验参数，对液态钢中多种元素进行定标研究，在此基础上，构建多元素同时辨识与定量分析的模型与方法。(4)冶金过程中液态钢成分的LIBS在线分析的应用研究。 本课题的研究内容为液态钢成分的LIBS实时在线检测方向奠定坚实的理论和技术基础。

中文关键词： 钢水成分；在线分析；激光诱导击穿光谱；数据预处理；定性/定量分析

英文摘要： Real-time, quantitative analysis method of multi-elements in liquid steel is studied, which is based on laser induced breakdown spectroscopy (LIBS). In brief, the main reseachs in this project are as follow: (1) The LIBS set-up for liquid steel is established. The interaction mechanism between laser and liquid steel is studied for the purpose of obtaining the formation mechanism of the plasma spectrum from generation to annihilation and its influencing factors, the affect principle and correction methods of matrix effect and self-absorption effect. All of these will provide a theoretical basis for the LIBS liquid steel composition on-line detection. (2) Some practical and effective liquid steel LIBS spectral data preprocessing methods and models are established, which are used to exclude abnormal spectral data, filter out the noise, implement baseline correction, automatic peak search and decomposition of overlapping peaks. (3) The influence of excitation and ionization property of the elements on the plasma is researched to optimize experimental parameters and calibration method of multi-elements in liquid steel is studied too, Multi-elements identification and quantitative analysis models and methods are constructed under those basis. (4) The technique of LIBS in this project will carry out for analysis of the

英文关键词： Molten steel composition；Online analysis；Laser induced breakdown spectroscopy；Data preprocessing；Qualitative / quantitative analysis