Vibration Energy Harvesting from Multi-Directional Motion Sources

Blad, T.W.A.; Machekposhti, Davood Farhadi; Herdser, J.L.; Holmes, Andrew S.; Tolou, N.

doi:10.1109/marss.2018.8481178

Cited by 2 publications

(2 citation statements)

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“…Demonstrating a substantial energy density of approximately 0.3 µW/mm 3 , these devices are suitable for a broad spectrum of applications [10,23]. Conventional vibration energy harvesters, typically comprising a silicon cantilever beam with a piezoelectric film and a proof mass (Figure 1a), are noted for their manufacturing simplicity [23,24]. However, their efficiency predominantly relies on matching the external excitation frequency with their resonant frequency.…”

Section: Introductionmentioning

confidence: 99%

“…Our device consists of an MEMS-based silicon cantilever beam integrated with a piezoelectric film and a cylindrical oscillator that is designed to trigger vibrations effectively in response to wind flow, harnessing energy across diverse environmental settings (Figure 1c). This approach, minimally reliant on external vibration sources, harnesses Karman vortex dynamics to generate perpendicular vibrations to the direction of the fluid flow, thereby facilitating efficient energy capture [23][24][25]. Particularly suited for MEMS applications, this method offers both simplicity and adaptability under varying wind conditions [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fluid Flow to Electricity: Capturing Flow-Induced Vibrations with Micro-Electromechanical-System-Based Piezoelectric Energy Harvester

Kang,

Kim,

Shin

et al. 2024

Micromachines

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We introduce a micro-electromechanical system (MEMS) energy harvester, designed for capturing flow energy. Moving beyond traditional vibration-based energy harvesting, our approach incorporates a cylindrical oscillator mounted on an MEMS chip, effectively harnessing wind energy through flow-induced vibration (FIV). A highlight of our research is the development of a comprehensive fabrication process, utilizing a 5.00 µm thick cantilever beam and piezoelectric film, optimized through advanced micromachining techniques. This process ensures the harvester’s alignment with theoretical predictions and enhances its operational efficiency. Our wind tunnel experiments confirmed the harvester’s capability to generate a notable electrical output, with a peak voltage of 2.56 mV at an 8.00 m/s wind speed. Furthermore, we observed a strong correlation between the experimentally measured voltage frequencies and the lift force frequency observed by CFD analysis, with dominant frequencies identified in the range of 830 Hz to 867 Hz, demonstrating the potential application in actual flow environments. By demonstrating the feasibility of efficient energy conversion from ambient wind, our research contributes to the development of sustainable energy solutions and low-power wireless electron devices.

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