This paper demonstrates the use of a smartphone’s sensors in recording experimental data for investigating the large angle of a physical pendulum. The smartphone (iPhone 5s) was attached to a beam to record simultaneously both the angular position and the angular speed of the beam oscillating about the pivot. The period and phase space of the oscillation were theoretically calculated and were compared with the experimental data. It was found that the experimental results agreed well with the theoretical calculations. We expect that this experiment based on a smartphone’s sensors could be useful for physics teachers and encourage the interest of students.

中文翻译：

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使用智能手机的传感器研究物理钟摆的大角度

本文演示了使用智能手机的传感器记录实验数据，以研究物理钟摆的大角度。将智能手机（iPhone 5s）连接到梁上，以同时记录围绕枢轴摆动的梁的角位置和角速度。理论计算了振荡的周期和相空间，并与实验数据进行了比较。发现实验结果与理论计算吻合良好。我们希望这项基于智能手机传感器的实验对物理教师有用并激发学生的兴趣。