| Title |
Vibration energy harvester with double frequency-up conversion mechanism for self-powered sensing system in smart city |
| ID_Doc |
37521 |
| Authors |
Luo, AX; Xu, WH; Sun, JY; Xi, KL; Tang, SY; Guo, XE; Lee, CK; Wang, F |
| Title |
Vibration energy harvester with double frequency-up conversion mechanism for self-powered sensing system in smart city |
| Year |
2023 |
| Published |
|
| Abstract |
This paper has proposed a vibration energy harvester (VEH) with double frequency-up conversion (FUC) mechanism which can be applied to harvest energy from vibrations at ultra-low frequency. The device can initially up-convert the external vibrations with sub-Hertz into tens of Hertz, and further convert to hundreds of Hertz by the second FUC mechanism, which gives a high conversion ratio of 8400. A comprehensive dynamic model has been proposed and verified both from the theoretical analysis and COMSOL simulation to analyze the frequency conversion process and output voltage. When excited by a frequency of 0.2 Hz, an average output power of 75 mu W could be obtained with a compact size. Benefiting from the non-contact design, the device could be applied in some sealed scenarios for smart city construction. Herein, a wireless humid-temperature sensor node in the pipeline was successfully powered by harvesting energy from humans walking with the proposed VEH, showing promising application prospects. |
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