舰载红外成像探测跟踪系统仿真研究

Study on Shipborne IR Imaging Detection and Tracking System Simulation

仿真研究由目标、背景、大气传输和传感器四部分组成 .在对目标辐射度的分析中 ,研究目标温度和发射率的计算方法 .计算背景辐射时 ,重点考虑了海水本身的热辐射特性 ,并将天空背景的辐射等价于探测器路径上的大气辐射 .对大气中的传输研究采用了LOWTRAN模型 .仿真中考虑了传感器的影响 ,包括光学系统和红外探测器 .在动态图像生成过程中 ,采用了多媒体定时器实现了仿真的实时性 .仿真的结果可以减少外场试验的次数 ,从而节省大量试验费用 .

Shipborne infrared detecting and tracking system was taken as the simulating platform here. The key technology of generating the infrared dynamic images of sea background was presented. The whole system could be divided into four parts: target, background, atmosphere transmission and sensor. In the analysis of radiation of the target, the way to determine the temperature and emission-rate were the main problems and the emission-rate was depended on the temperature. In the analysis of radiation of the background, the sea was regarded as the gray-body radiation and the sky was regarded as the atmosphere radiation along the infrared sensor detecting direction . The transmission of the radiation of the targets and background were calculated with the LOWTRAN model. In the simulation, the influence of the sensors including the optical systems and infrared detectors was considered. In the generation of the dynamic images, the multimedia timer was used to realize the real-time simulation. The simulation could reduce the field experiments cost.