Wrist-Worn Device Harvests Energy as You Walk

Sep-02-18 A wearable device able to harvest energy from low-frequency vibrations could generate power from the motion of a person walking.

Developed by a team from Penn State, the wrist-worn wearable features the common piezoelectric material PZT wrapped with a flexible metal foil. Increasing the thickness of the active material enables the device to generate more power, and the team also oriented the crystal structure of the piezoelectric film to optimize polarization and increase its energy-harvesting abilities.

The team then incorporated the new PZT material into a wrist-worn device that can harvest the relatively slow movement of a swinging wrist for energy.

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