Piezoelectric has great potential in energy harvesting. In the present work, investigations have been made on harvesting mechanical vibration energy by a diaphragm type piezoelectric element. The piezoelectric element has been placed at the center of a fix-free-fix-free rectangular plate. Excitation to the plate in the range of 10 Hz-150 Hz frequencies and 10 mVpp to 150 mVpp amplitude has been applied by a model exciter. The output from piezoelectric element has been measured in terms of current and voltage. The experimental results have revealed that the power output of piezoelectric increases with an increase in input amplitude. However, at constant input amplitude (150 mVpp) in the frequency range 10 Hz to 150 Hz, the power output has attained its maximum value (902 μW) at frequency 60 Hz. Further, the energy harvesting capabilities have also been investigated near the natural frequency band of the structure. The results have showed that in the natural frequency band, even a low amplitude excitation can also increase power output from the piezoelectric element. It has been concluded that using a piezoelectric element, vibration energy can be converted into electrical energy to operate small gadgets.

中文翻译：

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使用隔膜型压电元件从低频正弦振动中收集能量

压电在能量收集方面具有巨大潜力。在目前的工作中，已经对通过隔膜型压电元件收集机械振动能量进行了研究。压电元件已放置在免固定免固定矩形板的中心。模型激励器已在 10 Hz-150 Hz 频率和 10 mVpp 至 150 mVpp 振幅范围内对板进行激励。压电元件的输出已根据电流和电压进行测量。实验结果表明，压电体的功率输出随着输入幅度的增加而增加。然而，在 10 Hz 至 150 Hz 频率范围内的恒定输入幅度 (150 mVpp) 下，功率输出在 60 Hz 频率下达到其最大值 (902 μW)。更远，在结构的自然频带附近还研究了能量收集能力。结果表明，在固有频带内，即使是低振幅激励也可以增加压电元件的功率输出。已经得出结论，使用压电元件，可以将振动能量转换为电能来操作小工具。