摘要
为了研究伪装涂料8～14μm波段的平均发射率在不同季节的取值范围,结合太阳辐射,植被温度以及气温的一日变化,建立目标及单一植被背景在晴朗天气情况下不同季节的一日辐射温度变化模型.以合肥地区为例,分别以春分、夏至、秋分、冬至四个节气的日气候状况代表春夏秋冬四季的气候特征,采集该地区在四个节气近五年的日值气侯数据,对覆盖不同发射率伪装涂料的目标以及植被背景在四个节气中从6时到22时的辐射温度变化进行模拟.获得目标和植被背景的日辐射温度变化数据,计算不同覆盖发射率值的伪装涂层时的目标和背景的欧氏距离和伪装效率.利用欧氏距离和伪装效率对目标的伪装效果进行分析.当欧氏距离最小时目标与植被背景红外特征最接近,春夏秋冬欧氏距离最小时的发射率值依次为0.58、0.33、0.41、0.86;以参考目标与背景的辐射温度差控制在4K以内为实现隐身的标准,春夏秋冬伪装效率最高时的发射率值依次为0.6、0.3、0.4、0.9.
To analyses the seasonal requirement of camouflage paint＇s average emissivity in 8--14μm waveband,after simulating the change of the solar radiation, the vegetative covers temperature and the air temperature in one day,a temperature model of target and vegetative cover that display the changing of their radiation temperature in one day of different seasons was built. Hefei as an example, represent four seasonsr climate by the weather conditions of spring equinox, summer solstice, autumnal equinox and winter solstice and collect Hefeirs climate data of these solar terms in recent five years. Imitated the radiation temperature of target that covered the camouflage paint with different average emissivity in 8-- 14μm waveband and vegetative cover from 6 to 22 in these solar terms. The Euclid Distance and the camouflage efficiency were obtained by the radiation temperature data to analyze the camouflage effect. When the Euclid Distance is least the infrared characteristic of target is closest to the vegetative coverrs. In this condition, the emissivities in different seasons are 0. 58, 0. 33, 0. 41 and 0. 86. Radiation temperature difference between target and background within 4K is the standard to achieve stealth. Reference this standard, the target has the best camouflage efficiency in different seasons when the emissivities are 0.6,0.3,0.4 and 0.9.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2015年第3期176-181,共6页
Acta Photonica Sinica
基金
"十二五"预研项目资助
关键词
红外伪装
发射率
季节性
数值分析
Infrared camouflage
Emissivity
Seasonal
Numerical analysis
