摘要
本文对狭缝相机测量目标速度的公式: V_0=l/l′V_F (1) V_0=tgφ·V_F/M (2)进行了分析;讨论了影响测量精度的因素。用X—70狭缝摄影机对目标进行了多次拍摄,得到了翔实的实验数据,并对数据进行了处理。根据(1)式计算的目标速度与速度的标定值作了比较;扫描拍摄时,根据(2)式计算的速度与自由落体运动的理论速度进行了比较。得出了XF—70狭缝相机作同步摄影时,其测量速度的相对精度达0.2％。用作扫描摄影时,其速度测量精度相对达0.8％的结论。
The measurement accuracy of target velocity for the slit camera according to the eguation.is analysed in this paper. The affection factors of measurement accuracy are discussed. The experiment data was obtained and processed. The computational results according to the equations(l) and (2) were compared with the criterion value and the theoretical velocity of the free falling object. It has been shown that the model XF-70 slit camera is used as the synchronous and scan photography. The relative accuracy of measuremement velocity is 0.2% and 0.8%, respectively.
