A wearable system of micromachined piezoelectric cantilevers coupled to a rotational oscillating mass for on-body energy harvesting

In this paper, we present a compact, wearable piezoelectric on-body harvesting system that uses a small eccentric mass from a common watch movement to mechanically deflect a set of micromachined piezoelectric cantilevers when excited by the low frequency movements of the human body. The piezoelectric cantilevers are directly coupled to the rotating mass via a set of pins located near its rotational center. The energy produced by each pluck of a single cantilever is 545 nJ, corresponding to a maximum output power of 11 μW for continuous plucking; however, accounting for the periodic rest of typical human motion, the average output power over a full day cycle will be considerably less.


Presented at:
27th IEEE International Conference on Micro Electro Mechanical Systems (MEMS), San Francisco, USA, January 26-30, 2014
Year:
2014
Laboratories:




 Record created 2014-09-15, last modified 2018-03-17


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