摘要
针对目前最新提出的激光原向反射式单CCD立靶测试系统中要求快速准确地对系统外部参数进行现场标定的问题,在对系统进行建模分析的基础上,提出了一种采用3个已知坐标的特征点,对所需标定的参数进行计算的方法。通过采集靶纸上3个已知坐标特征点的图像,分别计算3个点所对应实像和虚像的成像位置,结合已知坐标,即可标定出系统计算坐标所需的6个参数值。对于直径为7.62mm的弹丸,使用该方法进行外部参数标定,弹丸着靶坐标测试精度可达5mm以内。结果表明:该标定方法可快速且精确地对系统的各项外部参数进行现场标定,极大地提高了测试精度及测试效率。
For the purpose of solving the problem of finishing field calibration of external parameters efficiently and accurately in the single CCD vertical target system with laser retroreflector,which has been proposed lately,a method is proposed to calculate the parameters needing calibration based on the analyses of the system model,which obtains the result according to three feature points of the given coordinates.The image position is to be calculated respectively for the real image and virtual image of three feature points by processing their collected images.Combined with the known coordinates,the six parameters that are used to calculate the coordinates in system can be obtained.With external parameters calibration for7.62 mm projectile through this method,the measurement precision of projectile impact location is less than 5mm.The results indicate that this calibration method can be used to finish the field calibration efficiently and accurately of external parameters,greatly improving the precision and efficiency of the test.
出处
《火炮发射与控制学报》
北大核心
2015年第4期78-81,共4页
Journal of Gun Launch & Control
基金
教育部科学技术研究重点项目(No.211027)
山西省研究生优秀创新项目(No.20143080)
关键词
CCD立靶系统
参数标定
特征点
测试精度
CCD vertical target system
parameter calibration
feature points
test precision
