一种单线阵CCD立靶系统参数标定方法  

Calibration method for parameter of single-linear array CCD vertical target system

作　　者：董涛[1,2] 华灯鑫[1] 李言[1] 倪晋平[2] 

机构地区：[1]西安理工大学机械与精密仪器工程学院,陕西西安710048 [2]西安工业大学光电工程学院,陕西西安710032

出　　处：《西安理工大学学报》2015年第1期19-24,共6页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(60972005)

摘　　要：为提高单线阵CCD立靶的测量精度,提出一种基于测量模型的系统参数反演和标定方法。在假设相机镜头的焦距、倾角和主点坐标以及激光器发光点坐标等系统参数已知的情况下,建立相机捕获弹丸影像的中心像元位置、各系统参数以及弹丸着靶坐标之间的函数关系,通过实测的弹丸影像的中心像元位置和弹丸坐标值反求出与系统各参数相关的矩阵模型,而不需要求出具体的系统参数值。在实际测量中,只需根据所求得的矩阵模型和每次测得的目标影像的中心像元位置便可求得弹丸着靶坐标。根据系统测量原理,建立了系统的数学模型和参数标定模型,采用所提反演方法对系统参数进行了标定实验。模拟实弹实验的结果表明,本文方法的坐标测量精度明显优于传统方法。In order to improve the accuracy of measurement of single-linear array CCD vertical target system,a reversion and calibration method based on the parameter of systematic measurement model is proposed in this paper.Suppose that the focus,the camera tilt angle,the principal point coordinate of the lens and the coordinate of the laser luminous point are given.The functional relationships among central pixel position of the projectile image captured by the camera are established,the system parameters and the projectile coordinates,and then a matrix model of system parameters,rather than specific system parameters can be achieved on the basis of actually measured coordinates of projectile and central pixel position of projectile image.In the condition of practical measurement,the projectile coordinate can be obtained by means of the matrix model and measured central pixel positions of objective image.The systemic mathematical model and calibration model have been established on the basis of system measurement principle and then simulation test is done with the method proposed in this paper.The accuracy of measurement for the calibration method proposed in this paper is obviously superior to that of the traditional method.

关 键 词：着靶坐标 CCD相机 立靶 参数标定 

分 类 号：TJ012.3[兵器科学与技术—兵器发射理论与技术]