A design structure is developed in this article to harvest multi-direction vibration energy with piezoelectric monomorph energy transferring elements. According to the basic equations of piezoelectric materials and their mechanical analysis, the load voltage and output power models of the Rainbow shape piezoelectric monomorph energy transferring elements are established, which are then used to study the relationships between their output power and material shape parameters as well as their load resistance. A prototype of the Rainbow shape piezoelectric monomorph energy transferring elements is designed to validate the models. The results show that the calculation results are consistent with the experimental results, with the error of maximum output power being 5%. Moreover, the output power of the piezoelectric film increases as the length of the metal substrate and the width of the piezoelectric film increase, while it decreases as the width and thickness of the metal substrate and the initial curvature radius of the energy transferring elements increase. The output power of the piezoelectric film reaches maximum and then decreases as the length and thickness of the piezoelectric film increase. Furthermore, beryllium bronze substrate energy transferring elements are found to be superior to steel substrate energy transferring elements.
LIU Xiangjian, CHEN Renwen
. Analysis of Load Voltage and Output Power for Rainbow Shape Piezoelectric Monomorph Energy Transferring Elements[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2011
, 32(3)
: 561
-570
.
DOI: CNKI:11-1929/V.20101229.0935.000
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