多波段微量TNT成像探测的数值分析和实验研究

刘灏; 时家明; 袁忠才; 刘洋

doi:doi:10.3788/gzxb20164505.0514004

光子学报, 2016, 45 (5): 0514004, 网络出版: 2016-06-06

多波段微量TNT成像探测的数值分析和实验研究

Numerical Simulation and Experimental Study of Multi-band Trace TNT Detection by Imaging

论文大纲

刘灏 ^*时家明袁忠才刘洋

作者单位

脉冲功率激光技术国家重点实验室, 合肥 230037

激光光学热成像多波段微量爆炸物辐射温度 Laser optics Thermal imaging Multi-band Explosive residues Radiation temperature

摘要

建立了CO2激光器辐照微量爆炸物温升分布三维模型, 对激光辐照过程和冷却过程中8~14 μm和3~5 μm波段内的目标表面辐射温度变化特性分别进行分析.利用设计的探测系统对目标进行初步探测, 用8~14 μm和3~5 μm热像设备对目标进行观察分析.研究表明：在10.6 μm激光照射过程中, 8~14 μm波段内沾有TNT目标的辐射温度分别由TNT、基底在8~14 μm波段的发射率和对激光辐照的反射率共同决定；在3~5 μm内目标辐射温度主要由TNT、基底在3~5 μm波段的自身发射率决定.在探测过程中, 8~14 μm波段内沾染TNT区域的辐射温度明显高于周围区域, 而在3~5 μm波段内, 目标表面辐射温度整体下降, 并且沾染区域的辐射温度变得低于周围.

Abstract

The simulation of CO2 laser illumination on explosives was implemented. The three-dimensional models are built for the study of radiation temperature variation of the target surface during process of laser illumination and cooling down in 8~14 μm and 3~5 μm waveband. The target with explosive residues are observed with the thermal imaging equipment(8~14 μm and 3~5 μm). The studies show that the radiation temperatures of TNT and substrates are determined by the emissivity and reflectivity in process of laser illumination in 8~14 waveband. The radiation temperatures of TNT and substrates are determined by the emissivity in 3~5 μm. In the illumination process, the radiation temperature of TNT areas is higher than surrounding areas in 8~14 μm waveband. In 3~5 μm, the radiation temperature of target surface has decreased instantly, and the radiation temperature of stained areas is lower than surrounding areas.

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刘灏, 时家明, 袁忠才, 刘洋. 多波段微量TNT成像探测的数值分析和实验研究[J]. 光子学报, 2016, 45(5): 0514004. LIU Hao, SHI Jia-ming, YUAN Zhong-cai, LIU Yang. Numerical Simulation and Experimental Study of Multi-band Trace TNT Detection by Imaging[J]. ACTA PHOTONICA SINICA, 2016, 45(5): 0514004.

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