典型背景红外特性建模与数值分析  

Modeling and numerical analysis of typical background infrared characteristics

作　　者：张月 许卫东 周亮 杨鑫 ZHANG Yue;XU Weidong;ZHOU Liang;YANG Xin(Army Engineering University of PLA,Nanjing 210000,China)

机构地区：[1]陆军工程大学,江苏南京210000

出　　处：《现代电子技术》2022年第18期138-142,共5页Modern Electronics Technique

基　　金：江苏省自然科学基金项目(BK20180579)。

摘　　要：为了能够在复杂的背景环境中对各类背景进行红外辐射特性预测,文中以地表能量的吸收与发射作为热辐射产生机理,介绍背景的热传导方式以及各个热交换项的具体计算公式,并建立地面背景的温度模型。然后,通过综合考虑背景的类型、温度、风速、湿度等边界条件的影响,提出用参数代替无关变量的新思路简化热平衡方程,从而得到更简便的背景温度计算公式。最后,通过实地实验确定影响背景的红外辐射特性模型精度的主要因素,经过大量的实验数据比较分析,筛选出关键的实验数据;再利用实验数据计算出简化方程中各参数并进行拟合。计算结果表明:所建立的模型可以在实验的环境下反映地表表面温度的变化情况,能够为快速计算地表表面温度提供新思路,为实现实时监测背景红外特性提供理论基础。In order to be able to predict the infrared radiation characteristics of various backgrounds in a complex background environment, the absorption and emission of the surface energy are used as the heat radiation generation mechanism,the background heat conduction method and the specific calculation formula of each heat exchange item are introduced,and the temperature model of the ground background is established. In comprehensively consideration of the influence of the background type,temperature,wind speed,humidity and other boundary conditions,a new idea of replacing irrelevant variables with parameters is proposed to simplify the heat balance equation,so as to obtain more convenient equation for calculating the background temperature. After field experiments,the main factors affecting the accuracy of the infrared radiation characteristic model of the background are determined. The key experimental data are selected after multiple experimental data comparison and analysis. The experimental data is used to calculate and fitting each parameter in the simplified equation. The calculation results show that the built model can reflect the changes of the surface temperature in the experimental environment,provide a new idea for the rapid calculation of the surface temperature,and provide a theoretical basis for real-time monitoring of the background infrared characteristics.

关 键 词：复杂背景 红外特性 热平衡方程 热传导 温度模型 模型精度 拟合参数 地表表面温度 

分 类 号：TN219-34[电子电信—物理电子学]