Abstract
The wide-band design of a dandelion-shape piezoelectric vibration energy harvester was investigated to process the variety of the ambient vibration energy sources.A analysis model of resonant frequency for dandelion-shape piezoelectric vibration energy harvester was established.The theoretical results show that the frequency band of resonant frequency of the energy harvester can not be increased randomly.To verify the theoretical analysis,a frequency response experiment was performed,and the results obtained from the theoretical model indicate that theoretical analysis isbasically in agreement with the experimental results.Finally,the experiments were performed to measure the generating capacity of the dandelion-shape piezoelectric vibration energy harvester.The research results show that after a wide-band design for the dandelion-shape piezoelectric vibration energy harvester,it has higher output power in the range of 20Hz-34Hz and the maximal output power is around 2.3mW.The results demonstrate that the proposed piezoelectric vibration energy harvester can effectively increase the band of resonant frequency through the wide-band design and is easy to match the ambient vibration energy sources to get more vibration energies.
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