摘要
步进扫描是红外搜索系统实现大俯仰空间搜索的一种方式,用于探测较大高度范围内来袭目标。由于步进过程中俯仰基线需要不断调整,致使俯仰搜索范围与目标高度的重合存在一定偶然性,其搜索能力很难通过外场试验的方式进行评估。针对采用步进扫描方式的红外搜索系统,分析了目标与搜索系统瞬时视场相遇的规律,以目标与固定基线下红外搜索系统瞬时视场的相遇概率模型为基础,进一步给出了红外搜索系统步进扫描模式下的相遇概率模型,以某红外搜索系统为例,利用该模型对比了两种步进扫描模式的搜索效果,分析了步进扫描模式下不同搜索空域范围对作用距离及相应相遇概率的影响,为评估该类型红外搜索系统的搜索能力和最大程度发挥其能力提供了可以参考的方法。
Step scan is a way to realize large pitch region search in infrared search system,which is used to detect incoming targets in a large altitude range.As the pitch baseline needs to be constantly adjusted during the stepping process,the overlap between the pitch search range and the target altitude is accidental,and its search ability is difficult to be evaluated by field tests.Aiming at the infrared search system adopting step by step scanning mode,the law that the target meets the instantaneous visual field of the search system is analyzed in this paper.Based on the encounter probability model of the target and the instantaneous field of view of the infrared search system with a fixed baseline,the encounter probability model of the infrared search system under step by step scanning mode is further given.Taking an infrared search system as an example,the mode is used to compare the search effects of two step by step scanning modes and to analyze the influence of different search airspace ranges on the operating distance and corresponding encounter probability under step by step scanning mode,providing a reference method that can be used to evaluate the search ability of this type of infrared search system and to maximize its performance.
作者
张启鹏
夏斌
冯亮
ZHANG Qi-peng;XIA Bin;FENG Liang(No.63893 Unit of PLA,Luoyang 471000,China)
出处
《激光与红外》
CAS
CSCD
北大核心
2023年第9期1405-1409,共5页
Laser & Infrared
关键词
红外搜索
步进扫描
相遇概率
作用距离
IR searching
step scanning
encounter probability
operating range
