在光杠杆法测量金属丝的杨氏模量的实验中，需要通过测量光杠杆转轴到标尺的距离和标尺示数的变化来计算光杠杆系统转动的微小角度，本文利用手机Phyphox软件中测量斜面倾角的传感器，直接测量出手机转动的微小角度，从而得到金属丝的微小伸长量，此方法测得金属丝的杨氏模量的相对误差仅为0.5%.通过无线网络可以将手机和电脑互联，实验数据以图表的形式实时显示在电脑桌面，实验过程更直观.

In the experiment of measuring the Youngs modulus of metal wire using the optical lever method, it is necessary to calculate the small angle of rotation of the optical lever system by measuring the distance from the optical lever axis to the scale and the change in the scale reading. In this paper, a sensor for measuring the slope angle in the mobile phones Phyphox software is used to directly measure the small angle of rotation of the phone, thereby obtaining the small elongation of the metal wire. The relative error of measuring the Youngs modulus of the metal wire using this method is only 0.5%. Through wireless networks, mobile phones and computers can be interconnected, and experimental data can be displayed in real-time in the form of charts on the computer desktop, making the experimental process more intuitive.