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研究地面目标的红外立体特征,有助于全面掌握目标红外特性的细节,对红外热像的模拟、红外目标识别以及红外隐身设计等都有着重要的意义。文中通过对影响目标温度因素的定量分析,建立了地面目标表面温度的一般数学模型。以一维导热微分方程为例,计算了某建筑物墙壁不同方位的外表面温度在一天中随时间的变化关系,并与实际测量值进行了比较。在此基础上,最后对建筑物的红外辐射进行了理论计算和讨论。结果表明地面目标的红外立体特征在白天非常显著,在晚上的立体特征则没有白天显著。
Studying the infrared stereoscopic features of the ground targets helps to fully grasp the details of the target infrared features and is of great significance for the simulation of infrared thermal images, infrared target recognition and infrared stealth design. In this paper, a general mathematical model of surface target surface temperature is established by quantitative analysis of the factors affecting the target temperature. Taking the one-dimensional differential equation of heat conduction as an example, the change of the temperature of the outer surface of different directions of the wall of a building with time is calculated and compared with the actual measured value. Based on this, the theoretical calculation and discussion on the infrared radiation of buildings are carried out. The results show that the terrestrial target’s infrared stereoscopic features are very significant during the day, while the stereoscopic features at night are not significant during the day.