| 爆炸物检测中NQR信号的处理及判识 |
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| 引用本文： | 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,2014,31(3):381-388. |
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| 作者姓名： | 毛云志 郭华民 |
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| 作者单位： | 中国电波传播研究所，山东青岛 266107 |
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| 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.
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| 关 键 词： | 核四极矩共振(NQR) 信号处理 相关检测 硝胺 |
| 收稿时间： | 2013-10-30 |
Processing and Identifying NQR Signals in Explosive Detection |
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| MAO Yun-zhi,GUO Hua-min.Processing and Identifying NQR Signals in Explosive Detection[J].Chinese Journal of Magnetic Resonance,2014,31(3):381-388. |
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| Authors: | MAO Yun-zhi GUO Hua-min |
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| Institution: | Chinese Research Institute of Radiowave Propagation, Qingdao 266071, China |
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| 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. |
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| Keywords: | nuclear quadrupole resonance signal processing correlation detection nitroamine |
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