基于Lowtran软件包和Gabor匹配提高紫外告警系统探测距离

摘要

A new kind of UV and IR composite alarm warning system used in ground equipment was proposed to solve the problems of low detecting distances for a UV warning system and high false a-larm for a IR warning system.The detecting mechanisms,capturing conditions and effecting distances of the UV warning system were analyzed.Then,a mode for estimating the detecting distance of the UV warning system based on Lowtran was established to calculate the UV warning system's detecting distance to a solid fuel missile.In consideration of the effect on the detecting distance,a new way based on Gabor for matching the diagnostic image was used to improve the detecting accuracy for distances.Some experiments to validate our theory and detecting mode were carried out,results show that the detecting distance veracity can be controlled below 5%,and the warning distance can be improved from 5 km to 8 km when the void rate is below 1 time per 10 hours.Using the proposed detec-ting mode,the detecting efficiency of the complex warning system is enormously improved.This detection mode can also be used in other optical detection equipment.%为解决紫外告警探测距离近和红外告警虚警率高的矛盾,提出了一种紫外告警与红外跟踪相复合的应用于地面设备的新型告警/跟踪一体化模式.重点分析了紫外告警系统的探测机理、捕获条件及影响其作用距离的各种因素.基于Lowtran软件包建立了紫外告警系统探测距离估算模型用于精确估算近程固体推进剂导弹的探测距离.考虑UVCCD图像信号处理对探测距离的重要影响,采用基于Gabor特征的图像匹配方案有效提高系统灵敏度.系统仿真实验表明,该模型在系统硬件不变以及虚警率保持1 time/10 h的条件下能将探测距离估算误差控制在5%以内,可将目前紫外告警系统的探测距离由5 km提高到最远8 km,提高了告警系统的探测质量.本方案模型亦可用于其他光电探测设备.