Piezoelectric Energy Harvester for Harnessing Rotational Kinetic Energy through Linear Energy Conversion
Piezoelectric Energy Harvester for Harnessing Rotational Kinetic Energy through Linear Energy Conversion
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DOI：
10.3390/en16186504
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发表时间：
2023-09
期刊：
影响因子：
3.2
通讯作者：
Habib Sadiq Abdulkhaliq;Fergus Crawley;Patrick Luk;Zhenhua Luo
中科院分区：
文献类型：
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作者：
Habib Sadiq Abdulkhaliq;Fergus Crawley;Patrick Luk;Zhenhua Luo
近年来，使用传感器技术对各种类型的机械进行实时状态监测变得非常重要。然而，依靠电池为这些传感器供电被证明是次优的，因为它需要定期充电或更换。为了解决这个问题，从环境中收集废弃能源成为一种更有效的替代方案。车轮、风扇和涡轮机等日常应用都存在浪费旋转能量的环境来源。在这项研究中，我们提出了一种新的旋转能量采集器的设计，将旋转能量转化为线性能量。该线性能量冲击压电盘，产生电势。通过模拟，在不同的频率下的预期电位进行了评估。随后，通过将采集器连接到整流器进行AC到DC信号转换和示波器进行电压测量来进行实验测试。一个直流电动机复制了来自模拟的频率下的旋转运动，并测量了功率输出。使用功率传输定理，计算了模拟和实验功率输出，结果分别为188、513和1293 μW以及88.89、336和923 μW。这些结果表明，所设计的收获机与现有的旋转能量收获机的设计是有竞争力的，展示了这种新型收获机的有前途的潜力。
Real-time condition monitoring of various types of machinery using sensor technology has gained significant importance in recent years. However, relying on batteries to power these sensors proves to be sub-optimal, as it necessitates regular charging or replacement. To address this, harvesting waste energy from ambient sources emerges as a more efficient alternative. Everyday applications like vehicle wheels, fans, and turbines present ambient sources of waste rotational energy. In this study, we propose a novel rotational energy harvester design that converts rotational energy into linear energy. This linear energy impacts a piezoelectric disk, generating an electric potential. Through simulations, the expected electric potential at varying frequencies was evaluated. Subsequently, experimental tests were conducted by connecting the harvester to a rectifier for AC-to-DC signal conversion and an oscilloscope for voltage measurement. A DC motor replicated the rotational motion at the frequencies from the simulation, and the power output was measured. Using the power transfer theorem, simulation and experimental power outputs were calculated, resulting in values of 188, 513, and 1293 μW and 88.89, 336, and 923 μW, respectively. These results reveal that the designed harvester is competitive with those of existing rotational energy harvester designs, demonstrating the promising potential of this novel harvester.