【摘要】 目前机载光电观瞄系统存在激光作用距离远不及红外的问题。首先,通过建立脉冲激光雷达最大作用距离模型分析了主要影响因素,指出基于Hough变换进行TBD检测以降低最小可检测信噪比是可行的。其次,介绍了三脉冲累加及二值化预处理措施,并结合高采样率激光目标的宽度特征提出了下采样方法,剔除了大量单点噪声,解决了低速目标捕获的问题。最后,给出了根据空中目标速度选取样本进行参数空间在线收敛映射的激光目标TBD检测算法。实验结果表明:算法在0.8≤SNR≤2时仍有较好的检测性能,在10 Hz脉冲频率下能够满足实时测距的要求。更多还原

【Abstract】 In the airborne electro-optical system,laser action range is far less than the infrared detector.Firstly,the main factors that affect the detection range of pulsed LADAR were analyzed through the establishment of laser maximum range model,and points out that using TBD to reduce the minimum detectable SNR based on Hough transform is feasible.Secondly,the pretreatment measures of three pulses accumulation and binaryzation was introduced.Then,combining with the width characteristic of laser target at high sampling rate,the down-sampling method was given,which can not only eliminate a large number of single-point noises,but also solve the problem of low-speed target acquisition.Finally,the laser target TBD algorithm was proposed based on the online parameter space converging mapping which selected the samples through air target speed range.The experiments indicate that the algorithm has good detection performance at,and can meet the requirements of real-time target range in 10 Hz pulse frequency.更多还原