Piezoelectricity: harvesting energy from movement?
Vibration, pressure and motion can power small sensors, within important physical limits.
What if a vibration or a small amount of pressure could generate electricity?
Some piezoelectric materials generate a voltage when mechanically deformed. Part of that energy can be harvested, rectified and stored to power a low-consumption device.
I am especially interested in this concept for autonomous sensors: vibration monitoring, occasional measurements and devices without convenient access to wired power.
Potential applications — at the right scale
Harvesting energy from vibrating machines.
Low-power sensors and intermittent measurements.
Experimental devices embedded in floors or load-bearing structures.
The harvested power is generally limited and depends strongly on the frequency and amplitude of motion and the associated electronics. On its own, it cannot power most motors or mobile robots.
