The pizzicato knee-joint energy harvester is an experimental wearable device, that generates electricity via the bending of the wearer's knees as they walk
The lab prototype of the pizzicato knee-joint energy harvester
If you’ve ever worn a knee brace, then you may have noticed what a large change in angle your knee goes through with every step you take, and how quickly it does so. A team of scientists from the U.K.’s Cranfield University, University of Liverpool and University of Salford certainly noticed, and decided that all that movement should be put to use. The result is a wearable piezoelectric device that converts knee movement into electricity, which could in turn be used to power gadgets such as heart rate monitors, pedometers and accelerometers.
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