基于海面粗糙度的舰船尾流红外探测

摘要

Based on the phenomenon of different roughness between wake and surrounding sea surface, the infrared radiation difference between wake and surrounding sea surface is calculated under various detection angles and wind velocities by establishing sea surface radiation model.Various detection results and factors are analyzed under different weather and temperature conditions.The results show that the wake can be detected without temperature difference between wake and surrounding sea surface, and the apparent temperature difference will reach 5℃ between them under low air temperature.In case of existence of temperature difference and high air temperature, the wake will become dark and then bright on the detected image with increasing zenith angle.%从尾流表面与周围海面粗糙度不同的现象出发,在建立粗糙海面辐射模型的基础上,计算比较了探测天顶角及海面风速变化时尾流与周围海面的红外辐射差别.针对不同的气象和温差条件,分析了探测中可能出现的各种结果及其影响因素.结果表明,尾流与周围海面不存在温差也可探测到尾流,低气温时两者表观温度差最高接近5℃;存在温差且气温较高情况下,随着天顶角的增加,探测图像上尾流相比周围海面会出现先暗后亮的变化.