超大视场红外鱼眼告警系统的成像响应特性分析(英文)

Imaging response characteristics analysis of ultra-wide field of view infrared fish-eye warning system

超大视场红外鱼眼告警系统具有凝视半球空域,实时感知来自空中不同方向威胁的独特优点,在未来战争中必将有着广泛的应用。而对超大视场红外鱼眼告警系统的成像响应特性进行分析有助于解决其在应用中所出现的问题。对系统的温度响应特性、时间响应特性以及像面照度进行了分析,结果表明,在相同的环境温度下,系统的温度响应特性是线性的,且随着时间的推移系统的输出逐渐变大,在约70 min以后趋于稳定;当环境温度升高时,系统输出也相应变大,说明系统存在着能量漂移。通过对实验结果的进一步分析,结果表明,这种能量漂移是环境温度和系统的自热效应共同作用的结果。通过对同一目标不同位置处的灰度值进行分析,发现灰度值相对标准偏差仅为2.26%,说明不同位置处目标的灰度值几乎是相等的,从而表明系统的像面照度是均匀的,这与随后的理论分析相一致。对于超大视场红外鱼眼告警系统的算法设计方面具有重要的参考价值。

The ultra-wide field of view（UWFV） infrared fish-eye warning system has the ability of staring hemisphere space so that it can sense the threats from different directions at real time,which makes it be widely used in the future modern wars.It will be helpful in solving the problems in practical application to analyze the thermal imaging response characteristics of UWFV infrared fish-eye warning system.In this paper,the thermal imaging response characteristics including temperature response,time response and image illumination were analyzed respectively for UWFV infrared fish-eye warning system.It was found that under the same ambient temperature condition,the system temperature response was linear.With the process of time,the system output became bigger gradually,and it tended to be a fixed value after about 70 minutes.When the ambient temperature got higher,the system output was also increased,which indicated the exist of energy jitter.The experimental results show that the energy jitter is the co-action result of the ambient temperature and the self-heated effect.With the analysis of the gray values of the same target in different positions,it is found that the gray value relative standard deviation（RSD） is only 2.26%,which indicates that the target gray values in different positions are nearly equal,and hence it is proved that the system image illumination is uniform,which is consistent with the theory analysis.The result of this paper will have an important reference value in designing the algorithms for the UWFV infrared fish-eye warning system.