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为了提高三线阵立体测绘相机的时间同步精度,对相机时间系统工作原理进行了分析,建立了三线阵立体测绘相机的相机时间同步误差模型,并根据该模型采取缩短行同步计数器查询周期等多项措施对相机时间系统进行优化。针对相机时间同步误差在摄影过程中会随相机控制器工作时序变化这一现象,提出了一种实时检测相机时间同步精度的方法,用于实时检测并全程记录摄影过程中相机时间同步误差的动态变化,解决了常规仪器由于存储深度不足而无法长期检测这一难题。利用该方法检测了优化后的三线阵立体测绘相机时间系统的时间同步精度,结果表明,摄影过程中三线阵立体测绘相机的时间同步误差≤74.8μs,相机时间同步误差绝对值≤11.2μs的概率不低于0.95,满足技术指标要求。
In order to improve the time synchronization accuracy of the three-line array stereo camera, the working principle of the camera time system is analyzed and a camera time synchronization error model of the three-line array stereo camera is established. According to the model, a number of items Measures to optimize camera time system. Aiming at the phenomenon that the time synchronization error of camera changes with the timing of the camera controller during shooting, a method of real-time detection of camera time synchronization accuracy is proposed for real-time detection and recording of the dynamic of camera time synchronization error Change, to solve the conventional instrument due to insufficient storage depth and can not long-term detection of this problem. The method was used to test the time synchronization accuracy of the optimized time-base system of three-line array stereo camera. The results show that the time synchronization error of the three-line array stereo camera is ≤74.8μs and the absolute value of the camera time synchronization error ≤11.2μs Not less than 0.95, to meet the technical requirements.