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首页> 美国政府科技报告 >Harvesting Electric Energy During Walking With a Backpack: Physiological, Ergonomic, Biomechanical, and Electromechanical Materials, Devices, and System Considerations
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Harvesting Electric Energy During Walking With a Backpack: Physiological, Ergonomic, Biomechanical, and Electromechanical Materials, Devices, and System Considerations

机译：在背包行走期间收获电能：生理，人体工程学，生物力学和机电材料，设备和系统考虑因素

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The objective of this program is to investigate approaches which make use of several classes of electroactive materials developed recently for harvesting electric energy during walking. These newly developed electroactive materials including the electrostrictive PVDF based polymers and piezoelectric relaxor single crystals have shown order of magnitude improvement in terms of the elastic energy density in comparison with the traditional piezoelectric materials and much improved the electromechanical coupling factors. Furthermore, in this program, we show that the electromechanical conversion efficiency of a properly designed energy harvesting system can be much higher than these of the electroactive material itself. Using this principle, we demonstrated that an electric energy output of 39 mJ/cc with a 10% efficiency can be obtained from the electrostrictive PVDF polymers. Using 1-3 composites with ferroelectric relaxor single crystals, harvested electric power density of 96 mW/cc has been obtained (at 4 Hz).

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