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On the experimental determination of the efficiency of piezoelectric impact-type energy harvesters using a rotational flywheel

机译：用旋转飞轮实验测定压电冲击型能量收割机效率

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摘要

This paper demonstrates a novel methodology using a rotational flywheel to determine the energy conversion efficiency of the impact based piezoelectric energy harvesters. The influence of the impact speed and additional proof mass on the efficiency is presented here. In order to convert low frequency mechanical oscillations into usable electrical energy, a piezoelectric harvester is coupled to a rotating gear wheel driven by flywheel. The efficiency is determined from the ratio of the electrical energy generated by the harvester to the mechanical energy dissipated by the flywheel. The experimental results reveal that free vibrations of the harvester after plucking contribute significantly to the efficiency. The efficiency and output energy can be greatly improved by adding a proof mass to the harvester. Under certain conditions, the piezoelectric harvesters have an impact energy conversion efficiency of 1.2%.
机译：本文演示了一种新的方法，使用旋转飞轮来确定基于冲击的压电能量收割机的能量转换效率。这里给出了冲击速度和额外的验证对效率的影响。为了将低频机械振荡转换为可用的电能，压电收割机连接到由飞轮驱动的旋转齿轮。效率是从收割机产生的电能与飞轮散发的机械能量的比率确定的。实验结果表明，在拔牙后，收割机的自由振动显着贡献了效率。通过向收割机添加验证质量，可以大大提高效率和输出能量。在某些条件下，压电收割机的冲击能量转换效率为1.2％。

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