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本文对底片移动式跟踪系统提出了一个新的计时原理。方法是:在底片移动器上加装一套数字式位移测量装置。在每个标准时刻t_i对位移量S_i采样,将获得的数据(t_i,S_i)送入微型计算机处理,从而得出每一跟踪点的曝光时刻及计时精度的估计。结果表明,用此方法建立的计时系统是无迟滞的,精度为0.04ms。 此外,利用该系统可以对人造卫星跟踪照相机SBG原有计时系统进行详尽的研究,测定结果表明:SBG原计时系统的迟滞约为2.3ms,精度约为1ms。
In this paper, a new timing principle is put forward for the film moving tracking system. Method is: in the film mover to install a set of digital displacement measuring device. At each standard time t_i, the displacement S_i is sampled and the obtained data (t_i, S_i) is sent to the microcomputer for processing to obtain the exposure time and the timing accuracy estimation for each tracking point. The results show that the timing system established by this method is without delay, the accuracy of 0.04ms. In addition, the system can be used to make a thorough research on the original timekeeping system of satellite tracking camera SBG. The results show that the lag of SBG original timing system is about 2.3ms and the accuracy is about 1ms.