针对散射激光的全向激光告警系统激光威胁源定位技术研究

针对目前散射激光告警中只能定位到散射激光光斑,而不能追溯到敌方来袭激光源的现状,构建了战场环境下包括敌方威胁激光源、照射于某平台上的散射激光光斑以及全向激光告警系统在内的空间三维几何模型,推导了平台上散射激光光斑轮廓解析表达式,以及轮廓上任意一点相对鱼眼镜头的物方半视场角表达式。将成像于探测器上的光斑进行鱼眼成像畸变校正并取光斑边缘点,计算得到三维几何模型诸参数。再将模型参数与传感器阵列信息相结合,可最终获取敌方威胁激光源相对系统的方位和距离信息。最后对以上方法进行了实验验证并对产生误差的原因进行了分析。

Research on Laser Threat Source Localization of Omni-Directional Laser Warning System Based on Scattering Laser Detection

In order to resolve the problem that scattering laser warning can only localize the scattering laser spot, but cannot trace back to the enemy laser source at the present time, A three-dimensional (3D) model in war field circumstances including the enemy laser source, the scattering laser spot on some flat and omni-directional laser warning systems is established. The analytic expressions of the scattering laser spot contour on flat and the object space half-field angle of any point on the contour relative to fish eye lens were obtained. Then the spot imaged on sensor was fish eye distortion corrected. And the points on spot edge were selected, accordingly the parameters of 3D model were acquired. Whereafter the parameters were combined with information of sensor array, thus azimuth and distance of the enemy laser source relative to the system could be attained finally. In the end the experimental results validated the method, the cause of errors was analyzed.