自由落体测量重力加速度的仪器改进

Improving the Instrument of Measuring Free Fall Acceleration

改进了条形物体自由下落测量重力加速度的实验装置。通过重新设置条形物体的窗口,得到了一种利用该装置测量重力加速度的新方法。该方法采用不同的窗口确定挡光宽度,利用数字毫秒计的加速度测量功能可以测出初速度、末速度及从初速度变化到末速度的时间,最后利用单片机来完成加速度的计算和结果输出。通过对现有的实验仪器进行改进,扩展了它的用途,实现了用不同的方法来测量重力加速度。

The experimental apparatus for measuring the acceleration of the freely falling bar object is improved in this thesis. A new method of measuring the acceleration is obtained by resetting the window width of the bar object. It takes different windows to determine the light - blocked width and measures the muzzle velocity, the terminal velocity and the interval between them by using the millisecond meter. Finally, the calculation of the acceleration and result output can be got by the single chip microcomputer. By improving the experimental apparatus and expanding its usage, different methods of measuring the acceleration are presented,