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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。
Large field of view infrared fisheye alarm system with staring hemispheres airspace, real-time perception of different threats from the air in the unique advantages of the future war will have a wide range of applications. The analysis of the imaging response characteristics of the ultra-large-field infrared fisheye alarm system can help to solve the problems that arise in its application. The temperature response, time response and image plane illumination of the system are analyzed. The results show that under the same ambient temperature, the temperature response of the system is linear and the output of the system becomes larger with the passage of time. After about 70 min, the system tends to be stable. When the ambient temperature rises, the output of the system also increases correspondingly, indicating that there is energy drift in the system. By further analysis of the experimental results, the results show that this energy drift is the result of the interaction between ambient temperature and the system’s self-heating effect. By analyzing the gray values at different locations of the same target, we found that the relative standard deviation of the gray values is only 2.26%, indicating that the gray values of the targets at different locations are almost equal, which shows that the image plane illumination is uniform , Which is consistent with the subsequent theoretical analysis. It has an important reference value for the algorithm design of the large-field infrared fisheye alarm system.