双体制猫眼目标探测系统设计

Design of double system cat’s eye target detection system

为了提高“猫眼”目标探测系统在光电对抗环境中的抗干扰能力,对基于嵌入式平台的双探测器体制“猫眼”目标探测系统关键技术进行研究,并在此基础上提出了一种工作频率捷变的双体制“猫眼”探测技术。该技术利用“猫眼”目标对入射激光强度的调制特性,实现对目标与干扰源的区分,并采用激光调制及解调系统工作频率同步捷变的方法,进一步实现在光电对抗条件下系统的抗干扰能力。对上述技术的原理进行介绍,据此设计了基于FPGA的工程样机并进行了实际测试。实验结果表明,频率捷变的双体制“猫眼”目标探测系统可有效地区分目标及干扰源,当干扰源调制频率位于系统工作频率范围内时,仍可正确区分目标及干扰;在系统采用频率捷变的功能并且没有受到干扰时,目标坐标输出的均方根误差小于0.6像素。

In order to improve the anti-interference ability of cat’s eye target detection system in optoelectronic countermeasure environment,this paper studies the key technology of cat’s eye target detection system with dual-detector system based on embedded platform,and proposes a dual-system cat-eye detection technology with frequency agility.This technique uses the modulation characteristic of the cat's eye target on incident laser intensity to realize the distinction between the target and the interference source,and uses the method of laser modulation and demodulation system working frequency synchronous agility to further realize the anti-interference ability of the system under the photoelectric countermeasure condition.In this paper,the principles of the above technologies are introduced,and an engineering prototype based on FPGA is designed and tested.The experimental results show that the dual-system cat’s eye target detection system with frequency agility can effectively distinguish the target and the interference source when the modulation frequency of the interference source is within the operating frequency range of the system.When the system adopts the function of frequency agility and is not disturbed,the root mean square error of the target coordinate output is less than 0.6 pixels.