Vibration energy harvester with double frequency-up conversion mechanism for self-powered sensing system in smart city. (January 2023)

• Record Type: Journal Article
• Authors: Luo, Anxin; Xu, Weihan; Sun, Jiangyong; Xi, Kunling; Tang, Siyao; Guo, Xinge; Lee, Chengkuo; Wang, Fei
• Is Part Of: Nano energy. Volume 105(2023)
• Publication Date: 2023-01
• Subjects: VEH Vibration Energy Harvester -- FUC Frequency-up Conversion -- PZT Pb-based Lanthanum doped Zirconate Titanates; Vibration energy harvester -- Energy harvesting at low frequency -- Frequency-up conversion -- Self-powered sensing -- Smart city; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2022.108030
• Languages: English
• ISSNs: 2211-2855

Abstract

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 μW 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. Graphical Abstract: ga1 Highlights: A vibration energy harvester with double frequency-up conversion mechanism is proposed. External vibrations at sub-Hertz can be up-converted to hundreds of Hertz with a ratio of 8400. When excited at 0.2 Hz, an average output power of 75 μW could be obtained. Energy harvested from human walking is enough for wireless sensor in a pipeline.