基于EEMD-MRA方法的LIBS信号处理研究

LIBS技术优点众多，但由于光谱噪声干扰和基体效应等因素，影响了分析的准确度1]；EEMD方法能清晰的将LIBS信号中的不同特征成分自适应的分解开来。MRA方法能够补偿元素信号之间的互干扰，可进一步提高LIBS信号的准确性。通过自行搭建的测试系统获得了标准样品的原始信号，使用EEMD-MRA方法进行处理后，元素浓度曲线的决定系数R2得到了极大的提高，大大的提高数据的准确性，为LIBS信号的处理提供了一种全新的方式。

Research on LIBS Signal Processing Based on EEMD-MRA Method

LIBS technology has many advantages, but the analysis accuracy is affected by factors such as spectral noise interference and matrix effect1]; the EEMD method can decompose the different characteristic components of LIBS signal adaptively. The MRA method can compensate for the mutual interference between element signals and improve LIBS data accuracy. In this paper, the original signal of the standard sample is obtained through the self-built test system. After being processed by the EEMD-MRA method, the correlation coefficient R2 of the element concentration curve has been greatly improved, greatly improved the accuracy of data, and provided a new way for processing LIBS signal.