机载红外告警系统中探测与跟踪的若干关键技术研究
发布时间：2019-03-01 16:22
【摘要】：现代战争的结果越来越取决于科学技术的先进程度,攻击系统表现出对敌方的突破打击能力,防御系统则体现了对己方军事力量的保护能力。本课题从实战角度出发,对机载红外告警系统进行研究,用于增强己方防护,该告警系统利用了红外探测器实现对飞机、导弹等目标的检测。本文首先对红外探测器的作用距离及天空小目标的红外特性进行了探讨和仿真,根据实验结果确定了告警系统所使用的红外探测器;接着研究了惯性传感器测量值与探测器视场的关系,建立了惯性传感器与相邻图像单应矩阵之间的数学模型,该方法有效减少了视场配准所用时间,为告警系统的实时检测奠定基础;为了削弱天空中云层运动对红外告警系统的影响,提出了将目标分类处理的思想,在图像处理阶段选择不同方式,将系统资源进行了合理分配,降低了系统处理复杂度;在红外小目标探测中,采用了恒虚警控制方式对分割阈值进行自适应设置,优化了目标检测过程,通过对比实验说明了该方法的有效性;在系统目标数据关联部分,通过目标运动轨迹对虚假目标进行剔除,进一步降低了告警系统的虚警率。对本文提出的机载红外告警系统,采用FPGA+DSP硬件化设计,并进行数据采集及分析,结果表明该告警系统很好地满足了项目设计要求,具有良好精度且性能稳定。
[Abstract]:The result of modern war depends more and more on the advanced degree of science and technology. The attack system shows the ability to break through and attack the enemy, while the defense system embodies the ability to protect the military forces of one's own side. In this paper, the airborne infrared warning system is studied from the point of view of actual combat, which is used to enhance the self-protection. The infrared detector is used to detect the aircraft, missile and other targets. In this paper, the operating range of the infrared detector and the infrared characteristics of the small target in the sky are discussed and simulated. According to the experimental results, the infrared detector used in the alarm system is determined. Secondly, the relationship between the measured value of inertial sensor and the field of view of the detector is studied, and the mathematical model between the inertial sensor and the monoclinic matrix of adjacent images is established. This method can effectively reduce the time of field of view registration. It lays a foundation for real-time detection of alarm system. In order to weaken the influence of the cloud movement in the sky on the infrared warning system, the idea of classifying the target is put forward. In the image processing stage, the system resources are allocated reasonably and the complexity of the system processing is reduced. In infrared small target detection, the CFAR control method is used to set the segmentation threshold adaptively, and the target detection process is optimized. The effectiveness of the method is proved by the comparison experiment. In the target data association part of the system, the false target is eliminated by the moving trajectory of the target, and the false alarm rate of the alarm system is further reduced. The airborne infrared warning system proposed in this paper is designed with FPGA DSP hardware, and data acquisition and analysis are carried out. The results show that the alarm system meets the project design requirements well, and has good precision and stable performance.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN21
本文编号：2432591
[Abstract]:The result of modern war depends more and more on the advanced degree of science and technology. The attack system shows the ability to break through and attack the enemy, while the defense system embodies the ability to protect the military forces of one's own side. In this paper, the airborne infrared warning system is studied from the point of view of actual combat, which is used to enhance the self-protection. The infrared detector is used to detect the aircraft, missile and other targets. In this paper, the operating range of the infrared detector and the infrared characteristics of the small target in the sky are discussed and simulated. According to the experimental results, the infrared detector used in the alarm system is determined. Secondly, the relationship between the measured value of inertial sensor and the field of view of the detector is studied, and the mathematical model between the inertial sensor and the monoclinic matrix of adjacent images is established. This method can effectively reduce the time of field of view registration. It lays a foundation for real-time detection of alarm system. In order to weaken the influence of the cloud movement in the sky on the infrared warning system, the idea of classifying the target is put forward. In the image processing stage, the system resources are allocated reasonably and the complexity of the system processing is reduced. In infrared small target detection, the CFAR control method is used to set the segmentation threshold adaptively, and the target detection process is optimized. The effectiveness of the method is proved by the comparison experiment. In the target data association part of the system, the false target is eliminated by the moving trajectory of the target, and the false alarm rate of the alarm system is further reduced. The airborne infrared warning system proposed in this paper is designed with FPGA DSP hardware, and data acquisition and analysis are carried out. The results show that the alarm system meets the project design requirements well, and has good precision and stable performance.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN21
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