基于“M+N”理论的光谱分析中光源电压对预测精度影响的研究  

Study on Effect of Source Voltage on the Accuracy of Quantitative Spectral Analysis Based on "M+N" Theory

作　　者：李刚[1,2] 李哲[1,2] 李晓霞[3] 林凌[1,2] 张宝菊[4] 王为[4] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]天津大学天津市生物医学检测技术与仪器重点实验室,天津300072 [3]河北工业大学电气工程学院电磁场与电器可靠性省部共建重点实验室,天津300130 [4]天津师范大学物理与电子信息学院,天津300387

出　　处：《光谱学与光谱分析》2013年第6期1456-1461,共6页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(30973964);天津市应用基础及前沿技术研究计划项目(11JCZDJC17100);天津市科技计划项目;科技型中小企业创新基金项目(10ZXCXSY10400)资助

摘　　要："M+N"理论从误差理论的角度阐明了光谱分析中外界干扰因素即"N"因素对于测量精度的影响,并给出了提高测量精度的方法。通过采用实测变电压光源光谱数据与多组分线性吸收谱仿真模型相结合的方法,构造了三组分的理想混合溶液并选择光源电压作为影响被测组分浓度测量精度的"N"因素,分别设定了不同信噪比下的两组各三种不同的校正集与预测集样本"N"因素分布方式,得出了对于系统误差类"N"因素而言,校正集与预测集的"N"因素分布范围对组分浓度的预测精度具有一定影响的结论。实验结果验证了"M+N"理论中"N"因素用于提高测量精度的可行性,同时为其他测量系统减小外界干扰提高测量精度提供了理论指导。Based on the error theory, ＂M＋N＂ theory illustrates the effect of ＂N＂ factor such as external disturbance in the spec- tral analysis and provides a method to improve measurement accuracy. Multi-component ideal simulation model was established using the method that combines source spectra measured under different voltage with multi-component linear absorption spectral model. Meanwhile, source voltage was chosen as the ＂N＂ factor influencing the accuracy of measured component concentration. ＂N＂ factor distribution mode of samples was set to two groups with three different modes under different signal-to-noise ratio. It is concluded that prediction accuracy of component concentration is certainly influenced by ＂N＂ factor distribution range of calibration set and prediction set, which is system error. It was verified by the experimental results that ＂N＂ factor can be used to improve measurement accuracy based on ＂M＋N＂ theory. Moreover, this research supplies a theoretic guidance for reducing interference and improving measurement accuracy of complex measurement system.

关 键 词：“M+N”理论 光谱分析 “N”因素 系统误差 

分 类 号：O433.1[机械工程—光学工程]