描述了一种应用于微小型光学导引头视场下偏角标定的方法,通过获得导引头绕自身回转轴线转动时拍摄的固定靶标图像计算不同旋转角度时导引头中心视线落点和摄像机坐标系原点在世界坐标系下的坐标,以拟合获得的这2组点的分布建立空间几何关系进而得出下偏角。给出了3组实验数据,分别检验该方法的标定误差、实际所需的采样点数并给出了实际工作中的应用效果。实验表明该方法可以快速标定导引头系统的下偏角,其标定绝对误差小于0.10°。

A calibration method for deflection angle of mini-type optical seeker is presented. This method firstly obtains the images from the camera in the seeker when the seeker is rotating with its own rotation axis, and then calculates the placement points of central line of sight and the origin of the camera coordinate system in different rotation angles, finally gets the geometric relationship by fitting the distribution of these two groups of points, and then the deflection angle can be calculated. Three sets of experimental data are presented, which give the calibration error of this method, the number of sampling points needed in practice, and the application,respectively. The experimental results show that this method can be used to calibrate the deflection angle of the optical seeker fastly, and the calibration absolute error is less than 0.10 °.