This paper describes an alternative method for measuring the time or time interval of a moving object in linear motion using a smartphone’s proximity sensor. Two smartphones are stationary, placed on an inclined plane, and measure the time or time interval of a moving object (with attached a cardboard) passing through the sensor using the Phyphox app. The obtained data are used to calculate both velocity and acceleration for the moving object. This experiment is easy to set up with readily available objects and prevents damage to the smartphones.

中文翻译：

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使用智能手机的接近传感器测量线性运动中移动物体的速度和加速度

本文描述了一种使用智能手机的接近传感器测量移动物体线性运动的时间或时间间隔的替代方法。两部智能手机静止不动，放置在斜面上，使用 Phyphox 应用程序测量移动物体（附有纸板）通过传感器的时间或时间间隔。获得的数据用于计算移动物体的速度和加速度。该实验很容易使用现成的物体进行设置，并且可以防止损坏智能手机。