AI Summary & Key Takeaways
AI InsightThe level of power achieved in the experiments shows the potential of this device as an independent onboard power component and as a continuous battery charger for wearable electronic devices.
📌 3 Key Takeaways
Abstract
This paper presents a piezoelectric energy harvesting device that generates electrical power from knee motion during human gait. The device is composed of two MEMS-based piezoelectric patch transducers optimized for placement around knee joints with minimal footprint. Simulations were performed on COMSOL software to reveal maximum performance that can be achieved under normal walking conditions. The internal capacitance of the patch transducers was measured to be 80 nF, while the resistance was on the order of 470 k. The patch transducers were inserted in a knee brace worn by a volunteer subject, and were characterized for voltage and power generation. During walking, the maximum open circuit voltage and rms power were measured to be 14 V and 6.2 W, respectively. These values were observed to increase up to 14.4 V and 12 W during a moderate running activity. The level of power achieved in the experiments shows the potential of this device as an independent onboard power component and as a continuous battery charger for wearable electronic devices.