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本文通过对传统共振演示仪植入单片机及光电器件测量周期性策动力频率,实现了共振演示仪共振频率的数字化测量.对于固定的共振系统,不仅可以实时测量策动力频率、共振频率,而且在课堂演示中可以迅速、准确地复现不同频率下的共振现象.此外,通过将竖直钢条改为水平放置,实现了一端固定钢条弯曲振动共振演示与定量化研究,通过实际测量验证了文献[1]给出的相关结论,同时给出了一种测量材料杨氏模量的低成本的简单方法.
In this paper, we measure the frequency of periodic power by measuring the frequency of periodic implants on the single-chip computer and optoelectronic device, and realize the digital measurement of the resonance frequency of the resonance demonstrator.For a fixed resonance system, not only the power frequency and the resonance frequency can be measured in real time, In the classroom demonstration, the resonance phenomenon at different frequencies can be reproduced quickly and accurately.In addition, by changing the vertical steel bar to horizontal, the resonance vibration and the quantitative research of the bending vibration of the steel bar at one end are realized, and the actual measurement verifies The related conclusions given in [1] also give a simple and low-cost method for measuring the Young’s modulus of materials.