Energy harvesting study on single and multilayer ferroelectret foams under compressive force
Energy harvesting study on single and multilayer ferroelectret foams under compressive force
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DOI：
10.1109/tdei.2015.7116323
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发表时间：
2015-06
影响因子：
3.1
通讯作者：
Z. Luo;D. Zhu;Junjie Shi;S. Beeby;Chunhong Zhang;P. Proynov;B. Stark
中科院分区：
文献类型：
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作者：
Z. Luo;D. Zhu;Junjie Shi;S. Beeby;Chunhong Zhang;P. Proynov;B. Stark
泡沫型聚丙烯(PP)铁驻极体是一种薄而柔软的泡沫型泡沫塑料，在机械力作用下产生电能。这项工作研究了单层和多层铁驻极体PP泡沫塑料及其为人体佩戴的传感器提供能量的潜力。使用电动仪器模拟人类跌倒，使所施加的压力和动量与能量输出相关联。峰值功率、输出脉冲持续时间和每次冲击能量作为力和动量的函数进行了实验推导，并证明是外部负载阻力的强函数，从而提供了明确的最大能量点。证明了以牺牲一些峰值功率为代价来增加脉冲时间和将电压降低到与CMOS兼容的水平的可能性。为了进一步提高输出功率，提出了多层铁系驻极体。对各层的同步发电进行了仿真研究和说明，并进行了实验验证。最后，通过整流给电容器充电，比较了单层和多层铁电驻极体的能量输出。10层铁氧体驻极体的充电能力是单层铁氧体驻极体的29.1倍。它展示了能够为典型低功耗无线传感器芯片组的启动和传输提供动力的能量输出。
Cellular polypropylene (PP) ferro electret is a thin and flexible cellular polymer foam that generates electrical power under mechanical force. This work investigates single and multilayer ferro electret PP foams and their potential to supply energy for human-body-worn sensors. Human foot-fall is emulated using an electrodynamic instrument, allowing applied compressive force and momentum to be correlated with energy output. Peak power, output pulse duration, and energy per strike is derived experimentally as a function of force and momentum, and shown to be a strong function of external load resistance, thus providing a clear maximum energy point. The possibility of increasing pulse time and reducing voltage to CMOS compatible levels at some expense of peak power is shown. To further increase the output power, multilayer ferro electret is presented. The synchronized power generation of each layer is studied and illustrated using simulation, and results are supported by experiments. Finally, the energy output of single-layer and multi-layer ferro electrets are compared by charging a capacitor via a rectifier. A ten-layer ferro electret is shown to have charging ability 29.1 times better than that of the single-layer ferro electret. It demonstrates energy output that is capable of powering the start-up and transmission of a typical low-power wireless sensor chipset.