期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 230, 期 -, 页码 1-8出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2015.03.038
关键词
Vibration energy harvesting; Multi-directional; Piezoelectric; Dandelion-like; Energy conversion efficiency
资金
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- National Natural Science Foundation of China [10972102]
- Research Fund for the Doctoral Program of Higher Education of China [200802870007]
- Technology Research and Development Program of Jiangsu Province [BE2009163]
To achieve effective harvesting of ambient vibration energy in different directions, this paper proposes a dandelion-like multi-directional piezoelectric vibration energy harvester (MD-PVEH). After theoretical design, analysis and optimization of the device, validation experiments were carried out, which shows that the dandelion-like MD-PVEH can harvest relatively more energy in different excitations, although it harvests less energy from excitation in individual directions (for example, the angle between excitation direction and X axis is pi/2 in XZ plane). Overall, this dandelion-like MD-PVEH with a load resistor of 8 k Omega can reach its maximum output power of about 0.28 mW and maximum energy conversion efficiency of 3% in the harmonic excitation which the frequency and amplitude are 22 Hz and 0.28 mm, respectively. It can meet the needs of many microelectronic devices. (C) 2015 Elsevier B.V. All rights reserved.
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