Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 243, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2021.114439
Keywords
Vibration energy harvester; Zigzag piezoelectric spring oscillator; Ultra-low frequency vibration
Categories
Funding
- National Natural Science Foundation of China [61971389, U1709218, 61801253]
- Natural Science Foundation of Zhejiang Province [LZ20F010006, LY20F010003, LY21F010006]
- Scientific Research Project of Education Department of Zhejiang Province [Y201942801]
- Fundamental Research Funds for the Provincial Universities of Zhejiang Grant [2020YW01]
- National Undergraduate Training Program for Innovation and Entrepreneurship Grant [202010356001]
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This study introduces an ultra-low frequency vibration energy harvester using a zigzag piezoelectric spring oscillator, which offers efficient energy output under slight vibrations in the external environment. The performance of the energy harvester can be optimized by adjusting the length of the spring and the mass of the ball, and experimental results demonstrate its potential to power low-power electronic devices and wireless sensor nodes.
This paper presents an ultra-low frequency vibration energy harvester using a zigzag piezoelectric spring oscillator, which consists of two piezoelectric zigzag springs and a rolling metal ball. The metal ball rolls and drives the piezoelectric springs to deform to harvest energy when a slight vibration occurs in the external environment. The natural frequency of zigzag spring oscillator piezoelectric energy harvester (ZSO-PEH) is related to the length of the spring and the weight of the ball, correlation analysis is carried out by theoretical derivation and ANSYS simulation. It is found experimentally that the proposed device offers efficient energy output in ultra-low frequency excitation. A maximum output power of 5.68 mW is achieved under the best matching resistance of 5.1 k omega at the excitation frequency of 3 Hz. The performance of energy harvester can be optimized by adjusting the length of the spring and the mass of the ball. The results show that the proposed piezoelectric energy harvester has the potential to power low-power electronic devices and wireless sensor nodes.
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