太赫兹时域谱技术在地雷探测中的应用

Application of Terahertz Technology for Landmine Detection

采用MINI-Z便携式太赫兹时域光谱仪,在0.1~2.5 THz的光谱范围内,对地雷中两类主要填充炸药RDX和HMX的特征吸收光谱进行了测量,获得了两种炸药的特征光谱,通过辨识炸药的太赫兹吸收谱实现了对地雷的探测.对因实验环境和条件的限制而造成的样品吸收谱线高频部分的振荡,采用小波变换降噪的数据处理方法,得到了两种炸药的明显的吸收趋势和特征吸收峰值.将测量结果与部分文献中数据进行对比,验证了结果的可靠性.

MINI - Z portable terahertz time-domain spectrometer was used. The absorption spectra of two types of filling explosives RDX and HMX in landmine were measured in 0.1 - 2.5 THz, and the characteristic spectra of two kinds of explosive were obtained. The landmine detection is achieved by measuring the tera- hertz absorption spectrum. Due to the limits in experimental environment, the spectral lines are oscillated in high frequency. The obvious absorption trend and absorption peaks of two kinds of explosives are obtained by using wavelet transform denoising. The reliability of results is proved by comparison with previous data.