采用改装电子秒表替代打点计时器的方法去测速度或加速度,不仅使实验操作简单而且可以有效的减少实验误差。实验过程主要用电子秒表对运动物体自动记录时间,用刻度尺测量光电门之间的距离,再利用运动学公式计算速度或加速度。 The use of modified electronic stopwatch instead of RBI timer to measure speed or acceleration, not only the experimental operation is simple and can effectively reduce the experimental error. The experiment mainly uses the electronic stopwatch to record the time automatically to the moving object, uses the scale to measure the distance between the photoelectric gates, and then uses the kinematics formula to calculate the speed or the acceleration.