通过对经纬仪的内同步原理介绍,分析了CCD相机在测量中的误差影响因素,采用校飞试验数据作差结果验证了目标视场位置及运动速度对测角精度的影响。结果表明:目前采用的同步模式会导致测角精度下降,且目标偏离中心越远(脱靶量大),误差越大。针对内同步带入的测角误差,给出了软硬件的误差修正方法,以测量数据验证了二阶多项式拟合修正方法的有效性。

The theory of theodolite intra-stream synchronization was introduced and the influence on the CCD camera in measurement errors was analyzed. The effect of target FOV location and velocity on the angle measurement accuracy was verified. The result shows that the existing synchronous mode results in decline of the angle measurement accuracy, and the error increases with the miss distance. The measurement error of the intra-stream synchronization was corrected by both software and hardware. The data processing method of the least square estimation was validated by the optical measurement data.