PETN炸药NQR信号处理方法

波谱学杂志 ›› 2009, Vol. 26 ›› Issue (4): 518-523.

PETN炸药NQR信号处理方法

北京理工大学机电学院，北京 100081

收稿日期:2009-04-01 修回日期:2009-04-28 出版日期:2009-12-05 发布日期:2009-12-05

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

School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China

Received:2009-04-01 Revised:2009-04-28 Online:2009-12-05 Published:2009-12-05

摘要/Abstract

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. 

关键词: 核四极共振（NQR）, 炸药探测, 小波变换, PTN炸药

Abstract:

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 accuracy of PETN detection.

Key words: NQR, explosive detection, wavelet transform, pentaerythritol tetranitrate

中图分类号:

O482.53

杨振磊, 徐更光, 王振华, 刘科种, 郝凤龙. PETN炸药NQR信号处理方法[J]. 波谱学杂志, 2009, 26(4): 518-523.

YANG Zhen-Lei, XU Geng-Guang, WANG Zhen-Hua, LIU Ke-Zhong, HAO Feng-Long. A Signal Processing Method for ¹⁴N-Nuclear Quadrupole Resonance Detection of Pentaerythritol Tetranitrate[J]. Chinese Journal of Magnetic Resonance, 2009, 26(4): 518-523.

参考文献

[1] Gao Pan(高攀), Jin Yao-hui(金耀辉), Zhang Guo-jin(张国进), et al. An explosive detection method based on NQR(基于核四极矩共振原理的炸药探测方法研究与实验)
[J]. Chinese Journal of Magnetic Resonance(波谱学杂志), 2008, 25(3): 371-378.

[2] Li Geng-ying(李鲠颖), Xia Xiao-jian(夏小建), Xu Xue-cheng(徐学诚). Remote nuclear quadrupole resonance detector for nitrogen-contained compounds in solids(含氮固体物质的核四极共振远程探测仪)
[J]. Chinese Journal of Scientific in Strument(仪器仪表学报), 1997, 18(4): 368-372.

[3] Zhou Jian-xin(周新建), Zhang Guo-jin(张国进), Gao Pan(高攀). Research on method of suppression of ring in NQR detection system(NQR探测系统振铃拖尾抑制方法研究)
[J]. Nuclear Electronics & Detection Technology(核电子学与探测技术), 2008, 28(3): 477-480.

[4] Zhao Zhen-Wei(赵振维), Lou Yang(娄扬), Jin Yan-Bo(金燕波). Signal processing for NQR based on adaptive filtering(基于自适应滤波技术的NQR信号处理)
[J]. Nuclear Elect ronics & Detection Technology(电波科学学报), 2008, 28(3): 429-433.

[5] Guo Hua-ming(郭华民), Zhang Guo-jin(张国进), Chen Chun(陈春), et al. Removal of the tail ing effects of transmitting pulse in a nuclear quadrupole resonance detecting system for explosive detection(NQR炸药检测系统中激励脉冲拖尾的抑制)
[J]. Chinese J Magn Reson(波谱学杂志), 2007, 24(2): 199-204.

[6] Peshkovsky A S, Cattena C J, Cerioni L M, et al. Noise-resilient multi-frequency surface sensor for nuclear quadrupole resonance
[J]. J Magn Reson, 2008, 194(2): 222-229.

[7] Deas R M, Gaskell M J, Long K, et al. An NQR study of the crystalline structure of TNT
[C]. Bellingham: Proc SPIE, 2004. 510-520.

[8] Li Zhi-qiang(李志强), Jin Yu-heng(金余桓). The data processing of the explosive detection system based on nuclear quadrupole resonance(基于核电四极矩共振技术的爆炸物检测系统的数据处理及信号识别算法)
[J]. Nuclear Electronics & Detection Technology(核电子学与探测技术), 2004, 24(6): 587-590.

[9] Li Geng-ying(李鲠颖). Study of shaping filtering in the detection of remote nuclear quadrupole resonance signals(整形滤波仔远程核四极共振探测中的应用)
[J]. Chinese J Magn Reson(波谱学杂志), 1996, 13(3): 303-308.

[10] Li Geng-ying (李鲠颖), Pan Tao(潘涛). Fast recognition of known signal by computer(己知信号的计算机快速识别)
[J]. Chinese J Magn Reson(波谱学杂志), 1996, 13(3): 283-290.