为拓展大学物理实验的实验内容和实验手段，设计了一套利用数字化传感器和数据采集器对两个弱耦合摆的振动模式进行实验研究的方案.该实验利用相较于弹簧更易于实现的手段实现了两个物理摆之间的耦合，并更易于调节其耦合强度.利用数字化转动传感器和数据采集器能完整记录该耦合系统的完整运动，观察并分析其中的简正模和拍现象，验证线性系统解的叠加原理.该方案易于实现，现象直观，结果中包含诸多物理现象可供分析讨论，并可与大学物理及高等数学相关知识点连接，能有效提高学生的自主探索热情，锻炼学生数据分析能力，拓展相关实验的教学深度.

A system with multiple freedom of movement exhibits different modes in which each part of the system will move in the same frequency. By proper choosing the initial condition, these different modes can add up into a superposition state and make the movement of the system show phenomenon of beat. Both of modes and beat phenomena are crucial to the understanding of oscillating and periodical properties of the system. This design of experiment clearly demonstrates these phenomena by using two pendulums coupled through an elastic band. With digital sensors and data collectors, the detail movement of the system are recorded by computer software which is available for further analysis by students. The coupling strength can be easily adjusted to show the dependence of beat on it.