基于小波变换的炸药NQR信号处理  

Processing Method of ^(14)N Nuclear Quadrupole Resonance Signal in Explosive

作　　者：杨振磊[1] 徐更光[1] 王振华[2] 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 [2]北京理工大学信息科学技术学院,北京100081

出　　处：《原子能科学技术》2010年第3期354-357,共4页Atomic Energy Science and Technology

摘　　要：利用核四极共振(NQR)原理探测隐藏炸药具有准确率高、误报率低、无磁污染等优点,但NQR信号十分微弱,湮没在噪声中,不易检测,成为制约NQR技术发展的瓶颈。根据NQR信号的特点,提出并实现了一种基于改进阈值函数小波变换的NQR信号处理方法。经过试验对比,该方法可有效消除外界噪声对信号的干扰,提高系统探测的准确性。Using nuclear quadrupole resonance（NQR） to detect hidden explosive has many advantages,such as high accuracy,low false alarm rate,non-magnetic pollution,and so on.However,NQR signal is very weak,obliterated in the noise,and difficult to recognize,and the practical use of NQR is restricted by this.According to the characteristics of NQR signal,a signal process method was presented and realized based on wavelet transform.It shows that this method can eliminate the interferences of external noise,and improve the detection accuracy of the system comparing with other methods.

关 键 词：核四极共振 炸药探测 小波变换 

分 类 号：TJ51[兵器科学与技术—军事化学与烟火技术]