用自制圆锥摆与Spss标定重力加速度

Calibrate the Gravity Acceleration with Self-made Conical Pendulum and Spss

用直流电源驱动自制圆锥摆实验系统,使小钢球做较为稳定的圆锥摆运动,可显著减弱小钢球的滞后现象,从而可忽略空气阻尼等因素的影响,使得对圆锥摆周期的测量更为准确。由测量原理及不确定分析,结合测量数据,用Spss分析得出长度综合量(A)与圆锥摆运动周期的平方(T2)呈线性关系,由此标定出重力加速度,并用置信概率为95%的不确定度对实验结果进行了分析与评价。

Driving self - made conical pendulum by do stable circle pendulum movement can weaken lagging DC power supply to make small steel balls of the small steel balls obviously, so we can ignore the effects of air resistance and so on, and can obtain the more accurate measurement of the period of the conical pendulum. According to the principle of measurement and uncertainty analysis, combined with the measurement data, we achieve that comprehensive weight of length （A） is linear to the square of the period of conical pendulum （T2）. So, we could calibrate the gravity acceIera- tion, and analyze and evaluate the experiment result with the confidence probability of 95% uncer- tainty.