Harnessing energy from spring suspension systems with a compressive-mode high-power-density piezoelectric transducer
Harnessing energy from spring suspension systems with a compressive-mode high-power-density piezoelectric transducer
复制标题
利用压缩模式高功率密度压电传感器利用弹簧悬架系统的能量
DOI：
10.1016/j.enconman.2020.113050
复制
发表时间：
2020-09-15
影响因子：
10.4
通讯作者：
Pu, Huayan
中科院分区：
文献类型：
--
作者：
Wang, Min;Yin, Peilun;Pu, Huayan
在本文中，我们提出了一种压缩型高功率密度压电换能器，用于收集弹簧悬架系统的振动能量。该装置由压电堆叠和力放大器组成。压电堆主要由多个PZT-5H压电单元组成。力放大器增强压电堆上的力以增加产生的能量。我们提出了换能器的机电转换关系。本文通过一系列的实验研究了原型机的输出能力。实验结果表明，在0.3 g谐波激励和1.975 k ω匹配阻抗下，样机在46.3 Hz谐振频率下平均输出功率可达13.63 mW。该原型在微法拉级电容器上具有优异的充电性能。例如，该原型在18.1秒内将1000亩F电容器充电至饱和（7.5 V）。该原型成功点亮了420个LED二极管。此外，原型机在300秒内为3v， 25mah的锂电池充电0.017 V。该研究对压电能量收集和为弹簧悬架系统中的无线传感器供电具有重要意义。
In this paper, we present a compressive-mode high-power-density piezoelectric transducer for harvesting vibration energy from spring suspension systems. This device is comprised of a piezoelectric stack and a force amplifier. The piezoelectric stack is mainly composed of multiple PZT-5H piezoelectric units. The force amplifier strengthens the force on the piezoelectric stack to increase the generated energy. We propose an electromechanical conversion relation for the transducer. In this paper, we studied the output capabilities of a prototype though a series of experiments. The experimental results verify the proposed relation and show that the prototype can reach an average output power of 13.63 mW at the resonant frequency of 46.3 Hz under the 0.3 g harmonic excitation with the 1.975 k Omega matched impedance. The prototype has an excellent charge performance with microfarad level capacitors. For instance, the prototype charged a 1000 mu F capacitor to saturation (7.5 V) within 18.1 s. The maximum 420 LED diodes were successfully lit by the prototype. Furthermore, the prototype charged a 3 V, 25 mAh lithium battery by 0.017 V in 300 s. This research can be of great significance for piezoelectric energy harvesting and powering wireless sensors in spring suspension systems.