电热膜红外假目标热特性分析

Thermal Characteristic Analysis for Electric Heating Film as Infrared Decoy

讨论了电热膜在自然环境下的热红外特征,分析不同热性质材料对电热膜温度的影响。通过有限差分方法求解热平衡方程证实:低的短波吸收系数有利于减小电热膜与真目标在白天的温度差异,而低辐射系数有利于减小夜间温度差异。不过,即使使用同时具有低短波吸收系数和低红外辐射系数的材料,电热膜也不能满足所有时段与真目标有近似的热特征,必须在温度低的时段对电热膜加热。

The infrared feature of electric heating film in natural environment is discussed, with the focus on the impact of different heat properties. On the basis of finite-difference solution to the thermal diffusion differential, it is confirmed that： low short wave absorption helps to decrease the temperature difference in the date time between electric heating film and real target, while low infrared emission can decrease the temperature difference in the night. However, complete similarity of diurnal heat behavior between electric heating film and real target can not be reached only by material selection, so it is necessary to heat the electric heating film when its temperature is low.