基于LabVIEW的太赫兹时域光谱分析软件

针对目前太赫兹光谱仪的数据采集和数据处理软件不能兼容的情况,设计了一个基于LabVIEW软件平台的THz时域光谱分析软件。主要研究了THz时域光谱系统的反射式以及透射式样品光学信息提取算法、支持向量机分类算法、以及偏最小二乘等分析算法以及它们的LabVIEW实现。该软件采用全LabVIEW代码实现,能够实现样品光学信息提取,物质分类识别以及多组分样品浓度分析,并且具有很高的移植性,可扩展性,与数据采集软件具有很好的兼容性。利用该光谱分析软件,分析了三种塑化剂的THz时域光谱信号,得到了它们在THz波段的折射率和吸收系数, 结果表明三种塑化剂可以用THz时域光谱完全区分,软件运行稳定可靠。

Development of THz time-domain spectrum analysis software based on LabVIEW

A THz time-domain spectrum analysis software is developed based on LabVIEW platform in order to deal with the issue that data processing software cannot be completely compatible with data acquisition software for present THz spectrographs. The algorithms for extracting optical information of samples in transmission and reflection THz spectroscopy, support vector machine (SVM) classification algorithms, and PLS algorithm are studied and programmed based on LabVIEW. All the source code of the software is LabVIEW language, with the functions of extracting optical information, classifying substance and analyzing concentration of multicomponent mixture. Moreover, the software is of high portability, extensibility, and compatibility with data acquisition software. The THz time domain spectrum of three kinds of plasticizers is analyzed with this software. The obtained refractive index and absorption coefficients show that three kinds of plasticizers can be distinguished by their THz spectrum and the software is reliable.