立靶精度测试系统的功能之一是准确测出直射武器的立靶坐标．根据系统测量原理，建立了立靶测量公式．又以微分法为基础，分析并计算了系统的理论误差．对光纤的标定结果表明，系统的理论误差明显降低，满足了设计要求，将立靶精度测试系统与纸靶测量法经靶场实弹射击进行了对比，证明本系统误差的理论分析是正确的，测量精度完全可以达到小于二分之一弹径的技术要求 One of the functions of the target accuracy testing system is to accurately detect the target coordinates of the direct-fired weapon. According to the principle of system measurement, established the target measurement formula. Based on the differential method, the theoretical error of the system is analyzed and calculated. The calibration results of the optical fiber show that the theoretical error of the system is obviously reduced and the design requirements are met. The comparison between the target accuracy test system and the paper target measurement method via shooting range live projectile shows that the theoretical analysis of the system error is correct. The measurement Accuracy can be achieved less than one half of the technical requirements of the bullet