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Using an elastic magnifier to increase power output and performance of heart-beat harvesters
Smart Materials and Structures ( IF 4.1 ) Pub Date : 2017-08-17 , DOI: 10.1088/1361-665x/aa7d93
Antonio C Galbier 1 , M Amin Karami 2
Affiliation  

Embedded piezoelectric energy harvesting (PEH) systems in medical pacemakers have been a growing and innovative research area. The goal of these systems, at present, is to remove the pacemaker battery, which makes up 60%-80% of the unit, and replace it with a sustainable power source. This requires that energy harvesting systems provide sufficient power, 1-3 μW, for operating a pacemaker. The goal of this work is to develop, test, and simulate cantilevered energy harvesters with a linear elastic magnifier (LEM). This research hopes to provide insight into the interaction between pacemaker energy harvesters and the heart. By introducing the elastic magnifier into linear and nonlinear systems oscillations of the tip are encouraged into high energy orbits and large tip deflections. A continuous nonlinear model is presented for the bistable piezoelectric energy harvesting (BPEH) system and a one-degree-of-freedom linear mass-spring-damper model is presented for the elastic magnifier. The elastic magnifier will not consider the damping negligible, unlike most models. A physical model was created for the bistable structure and formed to an elastic magnifier. A hydrogel was designed for the experimental model for the LEM. Experimental results show that the BPEH coupled with a LEM (BPEH + LEM) produces more power at certain input frequencies and operates a larger bandwidth than a PEH, BPEH, and a standard piezoelectric energy harvester with the elastic magnifier (PEH + LEM). Numerical simulations are consistent with these results. It was observed that the system enters high-energy and high orbit oscillations and that, ultimately, BPEH systems implemented in medical pacemakers can, if designed properly, have enhanced performance if positioned over the heart.

中文翻译:

使用弹性放大镜提高心跳采集器的功率输出和性能

医疗起搏器中的嵌入式压电能量收集 (PEH) 系统一直是一个不断发展的创新研究领域。目前,这些系统的目标是去除占装置 60%-80% 的起搏器电池,并用可持续电源取而代之。这要求能量收集系统提供足够的功率(1-3 μW)来操作起搏器。这项工作的目标是开发、测试和模拟带有线弹性放大镜 (LEM) 的悬臂式能量收集器。这项研究希望能够深入了解起搏器能量收集器与心脏之间的相互作用。通过将弹性放大镜引入线性和非线性系统,尖端的振荡被鼓励进入高能轨道和大的尖端偏转。为双稳态压电能量收集 (BPEH) 系统提供了一个连续非线性模型,并为弹性放大器提供了一个自由度线性质量弹簧阻尼器模型。与大多数型号不同,弹性放大镜不会考虑可忽略的阻尼。为双稳态结构创建物理模型并形成弹性放大镜。水凝胶是为 LEM 的实验模型设计的。实验结果表明,与 PEH、BPEH 和带有弹性放大器 (PEH + LEM) 的标准压电能量收集器相比,BPEH 与 LEM (BPEH + LEM) 耦合在某些输入频率下产生更多功率,并运行更大的带宽。数值模拟与这些结果一致。据观察,该系统进入高能和高轨道振荡,最终,
更新日期:2017-08-17
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