Modeling and Characterization of a Tunable Dual-Frequency Piezoelectric Energy Harvester

Vibration based energy harvesting provides a mean to provide electrical power to sensors in inaccessible environments. Electrical energy is harvested from ambient vibrations. In this paper, we present a concept and characterization results of a dual-frequency piezoelectric energy harvester with magnetic frequency tuning capabilities. The frequency-agile multi-mode capability enables the device to harvest on a wider range of operating frequencies than classical vibration energy harvesters. We subsequently investigate an approach to increase the electrical power output by implementing separated piezoelectric patches.

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