PETN炸药NQR信号处理方法  

A Signal Processing Method for ^(14)N-Nuclear Quadrupole Resonance Detection of Pentaerythritol Tetranitrate

作　　者：杨振磊[1] 徐更光[1] 王振华[1] 刘科种[1] 郝凤龙[1] 

机构地区：[1]北京理工大学机电学院,北京100081

出　　处：《波谱学杂志》2009年第4期518-523,共6页Chinese Journal of Magnetic Resonance

摘　　要：利用核四极共振(Nuclear Quadrupole Resonance,NQR)原理探测隐藏炸药,具有准确率高、误报率低、无放射性沾染和防护问题等优点.但NQR信号十分微弱,湮没在噪声中,检测困难,这成为制约NQR技术发展的一项瓶颈.为提升NQR信号信噪比,根据NQR信号的特点,提出了一种基于改进阈值函数小波变换的NQR信号去噪方法.计算表明该方法可以有效消除外界噪声对信号的干扰,提高探测的准确性.Nuclear quadrupole qesonance （NQR） methods can be used to detect hidden explosive, with advantages such as high accuracy, low false alarm rate and non-radioactive contamination. However, the practical use of the NQR methods for explosive detection are limited by low signal-to-noise ratio. In this work, a signal process method for NQR signals is presented, which is based on wavelet transform and specially designed for the detection of pentaerythritol tetranitrate （PETN） with NQR. It was shown that this method can eliminate the interferences from external noises, and improve the accu-racy of PETN detection.

关 键 词：核四极共振(NQR) 炸药探测 小波变换 PTN炸药 

分 类 号：O482.53[理学—固体物理]