基于THz光谱的HNS单体猛炸药含量分析系统

现有的傅里叶变换红外光谱仪无法实现六硝基芪的光谱定量分析,而作为常见单体猛炸药而言,能够快速识别并定量分析其含量具有重要意义,故研究设计了一种基于THz光谱技术的HNS检测系统。系统采用透射式吸收光谱计算模式。光路中引入电光调制模块,实现稳定快速的光程静态扫描。在实验获取HNS特征吸收峰位置的基础上,结合空气在此波段的吸收特性,获得了光谱数据相关系数表达式,并由此确定了多特征波长选择依据。结合比尔-朗伯定律,给出了HNS含量的函数表达式及其系数公式。实验通过化学配置法得到不同HNS含量的样品粉末,并以此含量作为标准值。将不同含量的多组HNS样品粉末进行压片处理,分别采用太赫兹光谱仪和本系统进行HNS含量检测。实验结果可知,HNS含量在0.10%~50.00%范围内两种检测方法效果相近,与标准值误差均低于5.0%,且本系统具有更好的线性度。

Study on the Design of Explosive (HNS)Content Analysis System Based on THz Spectrum Monomer

HNS quantitative spectral analysis can not be achieved with the existing infrared Fourier transform spectrometer.As a common monomer explosive concerned,quick identification and quantitative analysis of the substance is important,so it is neces-sary to research and design a HNS detection system based on THz spectroscopy.Transmissive mode was used in the system to calculate the content of HNS.Electro-optic modulator module was introduced in the system,in order to achieve steady and rapid static scanning optical path.In the experiments HNS characteristic absorption peak positions were acquired.With this basis, combined air absorption characteristics of the wavelength band and spectrum data correlation expression was obtained,thus more characteristic wavelengths selected were determined.According to Beer-Lambert law,the function expression of HNS content and coefficient formula were presented.In the experiment different content of HNS sample powder was obtained with chemical configuration method with the content at the standard level.It made HNS sample powder into HNS Sample slice for all HNS samples,and it carried out HNS content testing with MINI-Z Terahertz spectroscopy and the system.Experimental results show that the results of the two methods are similar in the range of 0.10% to 50.00% for HNS content.Their error is less than 5.0%compared to the standard value,and the system has better linearity.