基于目標(biāo)極化特性的人體隱藏危險(xiǎn)品檢測方法
發(fā)布時(shí)間:2018-09-03 08:42
【摘要】:為解決在站開式距離的人體隱藏危險(xiǎn)品檢測問題,利用目標(biāo)對雷達(dá)回波的退極化現(xiàn)象實(shí)現(xiàn)對槍支等金屬物的遠(yuǎn)距離檢測。通過測量待測對象的雷達(dá)的不同極化方向的回波并計(jì)算出檢測參量,就可以據(jù)此判斷待測對象是否攜帶有隱藏危險(xiǎn)品。為驗(yàn)證該方法有效性,設(shè)計(jì)并研制了一套140 GHz寬帶極化雷達(dá),并進(jìn)行了實(shí)驗(yàn)測量。實(shí)驗(yàn)結(jié)果表明:一方面,對于槍支,或者簡易爆炸物等退極化效應(yīng)顯著的目標(biāo),系統(tǒng)具有較好的檢測效果;另一方面,對于退極化效應(yīng)不明顯的目標(biāo)的檢測以及檢測距離的增加會導(dǎo)致系統(tǒng)的虛警和漏警概率增大,從而降低檢測性能。通過增大發(fā)射天線尺寸可以改善檢測效果,并且通過檢測參量的優(yōu)化可以提高同等距離下檢測性能。
[Abstract]:In order to solve the problem of detecting hidden dangerous goods in the open distance of human body, the depolarization phenomenon of radar echo is used to realize the remote detection of metal objects such as guns. By measuring the radar echo in different polarization directions and calculating the detection parameters, we can judge whether the target is carrying hidden dangerous goods. To verify the effectiveness of this method, a 140 GHz wideband polarimetric radar is designed and developed. The experimental results show that, on the one hand, the system has a good detection effect for targets with significant depolarization effects such as guns, or improvised explosives; on the other hand, The detection of targets which have not obvious depolarization effect and the increase of detection distance will lead to the increase of false alarm and false alarm probability, which will reduce the detection performance. The detection effect can be improved by increasing the size of the transmitting antenna, and the detection performance can be improved by optimizing the detection parameters at the same distance.
【作者單位】: 中國工程物理研究院電子工程研究所;
【基金】:國家973計(jì)劃項(xiàng)目(2015CB755406)~~
【分類號】:TN957.51
本文編號:2219467
[Abstract]:In order to solve the problem of detecting hidden dangerous goods in the open distance of human body, the depolarization phenomenon of radar echo is used to realize the remote detection of metal objects such as guns. By measuring the radar echo in different polarization directions and calculating the detection parameters, we can judge whether the target is carrying hidden dangerous goods. To verify the effectiveness of this method, a 140 GHz wideband polarimetric radar is designed and developed. The experimental results show that, on the one hand, the system has a good detection effect for targets with significant depolarization effects such as guns, or improvised explosives; on the other hand, The detection of targets which have not obvious depolarization effect and the increase of detection distance will lead to the increase of false alarm and false alarm probability, which will reduce the detection performance. The detection effect can be improved by increasing the size of the transmitting antenna, and the detection performance can be improved by optimizing the detection parameters at the same distance.
【作者單位】: 中國工程物理研究院電子工程研究所;
【基金】:國家973計(jì)劃項(xiàng)目(2015CB755406)~~
【分類號】:TN957.51
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