红外探测灵敏度自适应优化方法研究  

Research on Adaptive Optimization Method for Infrared Detection Sensitivity

作　　者：唐玉俊[1,3] 周晓萱 倪歆玥 陈凡胜 Tang Yujun;Zhou Xiaoxuan;Ni Xinyue;Chen Fansheng(Key Laboratory of Intelligent Infrared Perception,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,Zhejiang,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海技术物理研究所中国科学院智能红外感知重点实验室,上海200083 [2]国科大杭州高等研究院,浙江杭州310024 [3]中国科学院大学,北京100049

出　　处：《中国激光》2022年第21期180-185,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(61975222)。

摘　　要：对空天暗弱目标的高灵敏度连续探测是目前天基红外探测领域的重点研究方向。高速飞行器等目标由于机动性强、飞行速度快、飞行高度起伏大,其在系统入瞳处的辐射强度变化范围大;同时,飞行过程中地球背景复杂多变,系统对其连续探测的鲁棒性大幅降低。针对以上问题,综合分析了目标运动特性、背景辐射特征及其变化特点,提出了一种基于实时图像信息的积分时间、积分电容自适应寻优的探测跟踪方法。首先,根据目标典型运动速度和背景辐亮度特征,优化设计系统的积分电容和初始积分时间,对目标进行监视搜索。探测到目标后,收集目标的实际运动特征及邻域的背景辐射强度特征,根据目标运动轨迹的连续性和背景辐射变化的缓变性,自适应调整目标跟踪过程的最佳积分时间和积分电容,使目标信噪比持续保持最优,实现对目标的高灵敏度跟踪。Objective High-sensitivity continuous detection and tracking has gained widespread attention in the field of infrared surveillance of space dim targets. Moreover, studies on the infrared radiation and motion characteristics of targets are the premise of the system parameter design. High-speed air vehicles have strong maneuverability when the flight altitude and speed greatly fluctuate. Moreover, their angle of attack constantly changes and adjusts, showing a jumping trajectory during the flight. The radiant intensity reaching the entrance pupil of the detection system is low due to atmospheric absorption and changes drastically. Simultaneously, the background radiant intensity varies widely due to the complex and changeable earth background during flight, which reduces the detection efficiency of the traditional infrared detection system. However, current traditional detection systems using fixed parameters are unable to achieve high-sensitivity detection under all conditions when detecting targets with drastic changes in radiation and motion characteristics, leading to reduced system detection capability. Therefore, adaptively optimizing system parameters in real-time to ensure stable target detection and tracking is necessary. Additionally, it is necessary to propose a new detection method with real-time adaptive optimization of system parameters to ensure stable detection and tracking capabilities, thereby significantly improving the robustness of the system.Methods We propose a detection and tracking method via exposure time and integrating capacitor adaptive optimization using real-time image information. First, we develop a mathematical model of the system detection sensitivity decoupled from the target radiant intensity. The initial integration capacitance and exposure time are optimized to match the detector parameters with the optical system parameters using both the characteristics of the typical high-speed air vehicle motion and earth background radiation, respectively, and realizing a high-sensitivity

关 键 词：遥感 自适应 优化设计 连续探测跟踪 红外探测仿真 

分 类 号：TP702[自动化与计算机技术—检测技术与自动化装置]