针对目前单摆振动特性研究方法的不足,基于视频图像处理技术,提出了一种实验测量与数值计算相结合的方法来研究单摆的振动特性.该方法能计算出单摆摆长、位移、周期和最大摆角.绘制了单摆在几种任意摆角运动下的位移时间曲线,分析讨论了单摆周期随摆角的变化规律.与传统研究方法相比,该方法简单直观且计算精度高.

Considering the shortage of study on the simple pendulum oscillation character at the present time,a new method combining experiment and numerical calculation is advanced based on the computer video processing technique.This method can calculate the pendulum length,bit shift,period and maximum tilt angle.Some bit shift-time curve of simple pendulum in the arbitrary tilt angle is plotted,and the relation between pendulum period and tilt angle is discussed.This method comparing with traditional method is simple,illustrative and high precision.