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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: A self-powered wireless motion sensor based on a high-surface area reverse electrowetting-on-dielectric energy harvester.
    Author: Tasneem NT, Biswas DK, Adhikari PR, Gunti A, Patwary AB, Reid RC, Mahbub I.
    Journal: Sci Rep; 2022 Mar 08; 12(1):3782. PubMed ID: 35260661.
    Abstract:
    This paper presents a motion-sensing device with the capability of harvesting energy from low-frequency motion activities. Based on the high surface area reverse electrowetting-on-dielectric (REWOD) energy harvesting technique, mechanical modulation of the liquid generates an AC signal, which is modeled analytically and implemented in Matlab and COMSOL. A constant DC voltage is produced by using a rectifier and a DC-DC converter to power up the motion-sensing read-out circuit. A charge amplifier converts the generated charge into a proportional output voltage, which is transmitted wirelessly to a remote receiver. The harvested DC voltage after the rectifier and DC-DC converter is found to be 3.3 V, having a measured power conversion efficiency (PCE) of the rectifier as high as 40.26% at 5 Hz frequency. The energy harvester demonstrates a linear relationship between the frequency of motion and the generated output power, making it highly suitable as a self-powered wearable motion sensor.
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