空中侦察系统中红外小目标的被动测距  

Passive Ranging of Small Infrared Target in Airborne Reconnaissance

作　　者：付小宁[1] 王洁[1] 任保文[2] 

机构地区：[1]西安电子科技大学机电工程学院,西安710071 [2]西安电子科技大学理学院,西安710071

出　　处：《应用科学学报》2012年第3期294-298,共5页Journal of Applied Sciences

基　　金：国家自然科学基金(No.60872136);陕西省自然科学基础研究计划基金(No.2011JM8002)资助

摘　　要：针对光电对抗系统在红外小目标被动测距中的不足,提出了一种基于目标距离比和方向信息的被动测距算法.建立了三维空间中的目标和探测器运动模型,通过数学分析构建估计红外小目标距离的一元二次方程,其参数由相邻采样时刻目标到探测器的距离比、探测器自身空间坐标、目标对探测器的方位角及高低角决定.通过仿真实验和加噪分析验证了该方法的有效性.文中所提方法表达简单,可避免分母接近于零的情况,适用于机载或弹载双波段红外探测器对小目标的距离估计.To overcome the problems in passive ranging of infrared small targets used in photoelectric coun- termeasure systems, a passive ranging scheme is proposed based on the distance-ratio between two adjacent sampling times and the direction information about the azimuth and pitch angles of the target. A model of motion is build to describe the relative position between the observer and the target in a 3D space. With this model, a quadratic equation is derived, whose parameters can be calculated by using the distance-ratio, the 3D coordinates of the observer, and the azimuth and pitch angles of the target. The proposed method has a simple form, and can avoid the occurrence of near-zero values in the denominator. The performance is demonstrated by simulation. It is applicable to the estimation of the target distance with a dual-band infrared detection system installed on an airborne or missile-borne platform.

关 键 词：小目标 红外 被动测距 双波段 一元二次方程 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]