爆炸物检测中NQR 信号的处理及判识

波谱学杂志

爆炸物检测中NQR 信号的处理及判识

毛云志*，郭华民

中国电波传播研究所，山东青岛 266107

收稿日期:2013-10-30 修回日期:2014-07-17 出版日期:2014-09-05 发布日期:2014-09-05
作者简介:毛云志(1978-)，男，湖北武汉人，硕士研究生，工程师,电磁场与微波技术专业．电话：18660241791，E-mail： maoyunzhi2008@aliyun.com. *通讯联系人．

Processing and Identifying NQR Signals in Explosive Detection

MAO Yun-zhi*，GUO Hua-min

Chinese Research Institute of Radiowave Propagation, Qingdao 266071, China

Received:2013-10-30 Revised:2014-07-17 Online:2014-09-05 Published:2014-09-05
About author:*Corresponding author：MAO Yun-zhi, Tel: 18660241791, E-mail:maoyunzhi2008@aliyun.com.

摘要/Abstract

摘要：

介绍了基于核四极矩技术的爆炸物检测原理及信号处理方法．系统分析了NQR 信号检测中主要误差来源，提出多种方法消除NQR 信号处理中检测误差，主要包括相关累加消除随机噪声；单通道自适应消除振铃影响；相关性检测抑制同频干扰．实验表明相关检测可有效提高NQR 信号信噪比，提高微弱NQR 信号检测的准确性．

关键词: 核四极矩共振(NQR), 信号处理, 相关检测, 硝胺

Abstract:

The principles of using nuclear quadrupole resonance (NQR) to detect explosive, as well as the methods of signal processing were introduced. The main error sources of NQR signal detection were analyzed. Several methods are proposed to eliminate the errors: correlation accumulation for eliminating thermal noises; single channel adaptive algorithm for eliminate ringing; and correlation detection to hold radiofrequency interference. The experimental results showed that the signal-to-noise ratio of NQR signals can be improved effectively using correlation detection, resulting in improved accuracy of signal detection.

Key words: nuclear quadrupole resonance, signal processing, correlation detection, nitroamine

中图分类号:

TJ51
TH841

毛云志*，郭华民. 爆炸物检测中NQR 信号的处理及判识[J]. 波谱学杂志.

MAO Yun-zhi*，GUO Hua-min. Processing and Identifying NQR Signals in Explosive Detection[J]. Chinese Journal of Magnetic Resonance.

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