用改进的单摆实验系统与Spss标定重力加速度

对传统的单摆实验系统进行改进及调试,用电磁铁控制摆球起始状态的一致性,调节光电门至摆球所处最低平衡位置的正下端,用记时记数测速仪精准测定摆球振动的周期。通过对测量原理、不确定度的分析,引入Spss的曲线估计功能分析实验数据,得出实验系统的有效摆长复合量与摆球振动周期平方的定标曲线,并验证出有效摆长复合量与摆球振动周期的平方存在线性关系,由此标定出重力加速度,并用置信概率为95%的不确定度,对测量数据及其实验结果进行合理的分析和估算,最终得出较为合理的实验结果。

Calibrate the Gravity Acceleration by Improved Pendulum Experiment System and SPSS

We improve and debug traditional pendulum,utilize the consistency of the starting state of pendulum ball manipulated by electromagnet to adjust the photoelectric door under the lowest equilibrium position of the swinging ball,measure the accurate vibration cycle of the pendulum ball.By analyzing experiment principle and uncertainty we introduce curve estimation of SPSS to analyze experiment data,and obtain the calibration cure between the effective length of pendulum and square of the pendulum period,verify there exist linear relationship between the compound of effective pendulum length and square of the vibration cycle.So,we calibrate the gravity acceleration in the end,analyze and evaluate the measurement data and the experiment result with the confidence probability of 95% uncertainty in order to obtain the more reasonable experiment result.