用于落速测量的激光雷达电视跟踪系统

Laser radar TV tracking system of terminal velocity measurement

研制的激光雷达电视跟踪系统,采用脉冲激光测距结合圆光栅测角的方法,测定下落目标相对于测试点的斜距离、水平角和俯仰角的时间序列值;采用同步电视跟踪技术记录对应时刻的目标图像,根据目标图像相对于视场中心的位置,对光栅码盘的水平角和俯仰角读数进行中心修正,并对缺失的距离数据用插值方法弥补,最后,通过最小二乘拟合方法可获得目标的运动轨迹方程,从而给出目标在运动过程中任意时刻的下落速度。该激光雷达电视跟踪系统已多次应用于野外空间非定域物体的落速测量,实现的速度测量精度优于0.5m/s,在标准天候条件下对典型目标的作用距离不小于8km。

In developing the laser radar TV tracking system,pulsed laser ranging and circular gating goniometric have been comprised to measure the time series magnitude of inclined range,horizontal angle and pitch angle of falling target,which are relative to test point.The target image of corresponding time is also obtained by using synchronal TV tracking technology.According to its position with the center of the field,the central coordinates of the horizontal angle and pitch angle of gating code disc can be obtained,the missing distance date using interpolation method can be made up.At last though least squares techniques,the equation of target’s moving locus can be obtained.Accordingly,the terminal velocity of any time of the target in the moving progress is early given.The laser radar TV tracking system has already been applied in terminal velocity measurement of non-localized object in field space,the velocity measurement accuracy is better than 0.5 m/s,and effective distance with typical target on standard weather condition is bigger than 8 km.