Abstract
The development of wireless monitoring is currently restricted by the short lifetime of batteries, requiring frequent replacement. Utilization of abundant mechanical energy from the surrounding environment has attracted increasing attention in real-time monitoring. Herein, a coil-levitated hybrid generator was developed for the efficient harvesting of mechanical energy from mechanical motion. The novel coil-levitated structure adapted to the metal and magnetic environment. The output currents were systematically analyzed at different operation modes based on the unique combination of triboelectrification, electromagnetic induction, and piezoelectric effect. Under the excitation of vibration frequency and amplitude of 8 Hz and 5 mm respectively, the as-constructed triboelectric nanogenerator delivered a peak power density of 11.40 W/m3 at 10 MΩ. Meanwhile, the middle electromagnetic part and bottom piezoelectric generator provided peak power densities of 6.97 and 79.93 W/m2 at 10000 Ω, respectively. More importantly, the battery charging experiment was verified, in which a 30 mA h Li-ion battery can be charged from 2.57 to 3.27 V in about 90 min. In sum, a self-powered temperature and vibration monitoring system was successfully developed based on hybrid generator, promising for realizing wireless monitoring of mechanical equipment without any external power supply.
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Change history
21 May 2021
The corresponding author ChenYang Xue was misspelled into ChenYang Zheng.
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This work was supported by the National Key Research and Development Program of China (Grant No. 2019YFB2004800), the National Natural Science Foundation for Distinguished Young Scholars of China (Grant No. 61525107), the National Natural Science Foundation for China as National Major Scientific Instruments Development Project (Grant No. 61727806), and the Fund for Key Laboratory of Equipment Pre-research (Grant No. 6142001190409).
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Xue, X., Zhang, Z., Wu, B. et al. Coil-levitated hybrid generator for mechanical energy harvesting and wireless temperature and vibration monitoring. Sci. China Technol. Sci. 64, 1325–1334 (2021). https://doi.org/10.1007/s11431-020-1755-4
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DOI: https://doi.org/10.1007/s11431-020-1755-4