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Joint TNT and RDX detection via quadrupole resonance

机译：通过四极共振联合检测TNT和RDX

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Quadrupole resonance (QR) technology has been receiving increasing attention for explosive detection in applications including landmine detection. It can be used as a confirming sensor for buried plastic landmine detection by detecting the explosives within the mine. Since a single mine can contain more than one type of explosives (e.g., trinitrotoluene (TNT) and (RDX) compound), a detector designed to detect only one type of explosive may not provide the best detection. We focus herein on the joint detection of TNT and RDX explosives for the landmine detection via the QR sensor. To mitigate the RF interferences (RFIs) associated with the QR measurements, we apply a doubly constrained robust Capon beamformer (DCRCB) to perform the spatial beamforming by exploiting the spatial correlation of the RFIs. Based on the output of the spatial DCRCB, we devise a generalized likelihood ratio test (GLRT) for the joint TNT/RDX detection, which is referred to as the DCRCB-GLRT detector. We show that our detector has the constant false alarm rate (CFAR) property and that the detection variable obeys a x2 -mixture distribution in the mine-free scenario. The effectiveness of the proposed DCRCB-GLRT detector is demonstrated with the experimental data collected by Quantum Magnetics, Inc.
机译：四极共振（QR）技术在包括地雷检测在内的应用中对于爆炸物检测越来越受到关注。通过检测矿井内的爆炸物，它可以用作确认埋藏式塑料地雷的确认传感器。由于单个地雷可能包含多种爆炸物（例如三硝基甲苯（TNT）和（RDX）化合物），因此仅设计用于检测一种爆炸物的探测器可能无法提供最佳探测效果。在这里，我们将重点放在通过QR传感器联合检测TNT和RDX炸药来进行地雷检测。为了减轻与QR测量相关的RF干扰（RFI），我们利用双重约束的鲁棒Capon波束形成器（DCRCB）通过利用RFI的空间相关性来执行空间波束形成。基于空间DCRCB的输出，我们设计了用于联合TNT / RDX检测的广义似然比测试（GLRT），称为DCRCB-GLRT检测器。我们证明了我们的探测器具有恒定的误报率（CFAR）属性，并且在无雷情况下，探测变量服从x2混合物分布。 Quantum Magnetics，Inc.收集的实验数据证明了所提出的DCRCB-GLRT检测器的有效性。

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