重力加速度的测量是高中物理教学中的一个重要实验,常用的测量方法有单摆法、自由落体法等[1][2]。这些传统的实验法存在以下不足:用量角器测定摆角操作不方便且误差大;测量周期采用人工计时,受人体反应时间影响;只能记录几个数据,无法看到实验图象。数据采集器虽可以解决人工计时以及图象问题,但价格不菲。为克服以上不足,本文基于单摆法的原理,结合手机自带的传感器设计一个测量 The measurement of gravitational acceleration is an important experiment in high school physics teaching. The common measurement methods are pendulum method, free-fall method and so on [1] [2]. These traditional experimental methods have the following deficiencies: the measurement of the swing angle by a protractor is inconvenient and error-prone; the measurement period is manually measured and affected by human reaction time; only a few data can be recorded and the experimental image can not be seen. Although data acquisition can solve the artificial timing and image problems, but expensive. To overcome the above shortcomings, this article based on the principle of pendulum method, combined with the phone’s own sensor to design a measurement