介质层对驻极体基能量采集器输出性能的影响
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摘要
设计了一种以聚二甲基硅氧烷作为电容介质并同时用作弹性层的驻极体基微振动能量采集器。对双电容结构器件的测试结果表明:当振动强度为0.5 N、驻极体膜的表面电位为1 500 V、外接负载电阻为55 MΩ时,采集器的输出功率为29.1μW,是以空气为介质层时的2.7倍。采用LTC3588-1能量管理芯片,使用所制备的能量采集器,成功地实现了给无线发射模块的供电。
A new electret-based micro-vibration harvester structure with elastomer polydimethylsiloxane as capacitive medium is proposed. The experiment results show that the maximum output power for the harvester with dual capacitor structure is 29.1 μW, which is 3 times large for the harvester with air as capacitive medium, when the surface potential of the electret membrane is 1 500 V under a vibration driving force of 0.5 N and a load resistance of 55 MΩ. When a LTC3588-1 chip is adopted to manage the harvested energy, the electret-based micro-vibration energy harvester can power the wireless transmission module.
A new electret-based micro-vibration harvester structure with elastomer polydimethylsiloxane as capacitive medium is proposed. The experiment results show that the maximum output power for the harvester with dual capacitor structure is 29.1 μW, which is 3 times large for the harvester with air as capacitive medium, when the surface potential of the electret membrane is 1 500 V under a vibration driving force of 0.5 N and a load resistance of 55 MΩ. When a LTC3588-1 chip is adopted to manage the harvested energy, the electret-based micro-vibration energy harvester can power the wireless transmission module.
引文
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[2] 王中林.微纳系统中的可持续自供型电源:能源研究中的新兴领域[J].科学通报,2010(25):2472-2475.
[3] GHAVAMI M,AZIZI S,GHAZAVI M R.On the dynamics of a capacitive electret-based micro-cantilever for energy harvesting[J].Energy,2018,153:967-976.
[4] FUJITA T,FUJII K,ONISHI T,et al.Electret energy harvester vibrated at collision induced natural frequency[J].Procedia Engineering,2011,25:733-736.
[5] MA X C,YE R F,ZHANG T L,et al.Vibration energy harvesting with uni-polar electret film[J].Acta Physica Sinica,2016,65(17):177701.
[6] AHMAD M R,MD KHIR M H.Design,modeling and analysis of the trapezoidal electrodes structure for electrets energy harvester[C]// International Conference on Intelligent & Advanced Systems.IEEE,2012:133-135.
[7] WANG F,HANSEN O.Electrostatic energy harvesting device with out-of-the-plane gap closing scheme[J].Sensors and Actuators A:Physical,2014,211:131-137.
[8] KONG W,CHENG L,HE X,et al.Electret-based microfluidic power generator for harvesting vibrational energy by using ionic liquids[J].Microfluidics and Nanofluidics,2015,18(5/6):1299-1307.
[9] NARUSE Y,MATSUBARA N,MABUCHI K,et al.Electrostatic micro power generation from low-frequency vibration such as human motion[J].Journal of Micromechanics and Microengineering,2009,19(9):094002.
[10] HILLENBRAND J,PONDROM P,SESSLER G M.Electret transducer for vibration-based energy harvesting[J].Applied Physics Letters,2015,106(18):183902.
[11] CHEN G J,LAI M F,XIAO H M,et al.Unique charge storage characteristics of FEP/THV/FEP sandwich electret membrane polarized by thermally charging technology[J].Chinese Physics Letters,2014,31(12):127702.
[12] CHEN G J,LI Y F,XIAO H M,et al.A micro-oscillation-driven energy harvester based on a flexible bipolar electret membrane with high output power[J].Journal of Materials Chemistry A,2017,5(8):4150-4155.