The advancement of wearable devices continues to face the challenge of ensuring a sustainable power supply.Traditional human motion energy harvesters often suffer from low energy harvesting efficiency due to their rel...The advancement of wearable devices continues to face the challenge of ensuring a sustainable power supply.Traditional human motion energy harvesters often suffer from low energy harvesting efficiency due to their reliance on a single energy source.This study presents a novel pendulum inertial electromagnetic energy harvester(PI-EEH)to harvest multiplesource low-frequency human motion energy.The PI-EEH can simultaneously harvest both the leg swing energy and the foot impact energy during walking.A horizontal universal pendulum,combined with a frequency-up conversion mechanism,transforms irregular human motion into unidirectional high-frequency rotation.The output performance of the PI-EEH is evaluated through both theoretical analysis and experimental testing.A treadmill test is also conducted across various motion speeds to illustrate the benefits of PI-EEH.The peak power of PI-EEH can reach 54 mW at a speed of 3 km/h.Additionally,the PI-EEH can easily supply power for some wearable devices,like a GPS module and an acceleration sensor.The designed PIEEH offers a viable approach to harvesting energy from multiple-source human motion,which will have broad prospects in smart healthcare and IoT applications.展开更多
基金the support from the National Natural Science Foundation of China(Grant No.12232014)the Fundamental Research Funds for the Central Universities(Grant No.N2403027)the Ten Thousand Talents。
文摘The advancement of wearable devices continues to face the challenge of ensuring a sustainable power supply.Traditional human motion energy harvesters often suffer from low energy harvesting efficiency due to their reliance on a single energy source.This study presents a novel pendulum inertial electromagnetic energy harvester(PI-EEH)to harvest multiplesource low-frequency human motion energy.The PI-EEH can simultaneously harvest both the leg swing energy and the foot impact energy during walking.A horizontal universal pendulum,combined with a frequency-up conversion mechanism,transforms irregular human motion into unidirectional high-frequency rotation.The output performance of the PI-EEH is evaluated through both theoretical analysis and experimental testing.A treadmill test is also conducted across various motion speeds to illustrate the benefits of PI-EEH.The peak power of PI-EEH can reach 54 mW at a speed of 3 km/h.Additionally,the PI-EEH can easily supply power for some wearable devices,like a GPS module and an acceleration sensor.The designed PIEEH offers a viable approach to harvesting energy from multiple-source human motion,which will have broad prospects in smart healthcare and IoT applications.
