In an uniform accelerated motion experiment, the timing precision to record the moment a cart passes the measuring point can reach 10-4 S by Programmable Timer/Counter 8254. The experiment system can replace the traditional timing method.

• 在匀变速直线运动的实验中,利用可编程定时/计数器8254来记录运动小车过测点的时刻值,可使计时精度达到万分之一秒。 该实验系统可取代传统的计时方法。