不同云雨条件下红外热成像系统作用距离评估

发布时间：2018-01-08 16:21

本文关键词：不同云雨条件下红外热成像系统作用距离评估　出处：《应用光学》2016年02期 　论文类型：期刊论文

【摘要】：为求解红外热成像系统作用距离,以MODTRAN程序为基础,计算了不同云雨条件下的大气光谱透过率,并针对探测器定角度运行和定高度运行,分别运用光谱-路径等分法和光谱-角度等分法,对点源目标进行了红外热成像系统的探测距离求解。分析了卷云气象条件下,探测概率、降雨速率、云层厚度、云底高度等因素对大气光谱透过率和探测距离的影响。结果表明:探测概率的选取对热像仪探测距离计算结果影响较大,以坦克目标为例,探测概率由10%增加至90%时,探测距离降低21.7%;降雨对于大气透过率和探测距离影响也较大,降雨速率由0增加至4.0mm/h时,探测距离降低76.8%;云底厚度和云层高度的影响与探测器和云层的几何位置关系相关,人目标的探测距离上限值达5.60km;探测距离亦与探测器运行模式相关,最大差异3.8%左右。
[Abstract]:As for the infrared thermal imaging system, based on the MODTRAN code, different cloud conditions of atmospheric spectral transmittance was calculated, and the angle and height of detector operation operation, respectively, using spectral bisection method and path angle spectral bisection method, the point source target detection range for infrared thermal imaging cirrus system. Weather conditions, detection probability, rainfall rate, cloud thickness analysis, cloud base height and other factors on the atmospheric spectral transmittance and the detection distance effect. The results show that the detection probability calculation has great influence on the detection range of thermal imager, the tank as an example, the probability of detection is increased from 10% to 90%, the detection distance is reduced by 21.7%; rainfall for the atmospheric transmittance and the detection of large distance effect, rainfall rate increased from 0 to 4.0mm/h, the detection distance is reduced by 76.8%; the cloud bottom thickness and high clouds The influence of the degree is related to the geometric position relationship between the detector and the cloud layer. The upper limit of the detection distance of human targets is 5.60km, and the detection distance is also related to the operation mode of the detector. The maximum difference is about 3.8%.

【作者单位】：哈尔滨工业大学能源学院;中国舰船研究设计中心;
【基金】：国家自然科学基金(51536001)
【分类号】：TN215
【正文快照】： 引言红外热成像系统是空间探测、资源调查、环境监测、通信导航、气象预报、测绘侦察等领域中所广泛使用的一项重要的系统级设备[1],其基本原理是由被探测目标自身发出的红外辐射,经由大气传输,到达探测器光学接收元件,引起探测单元电压上升,从而被控制系统捕捉而侦测[2-4],其

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