Simulation and Experimental Verification of a Bimorph Beam Piezoelectric Energy Harvesting Devices

摘要

A bimorph beam piezoelectric energy harvesting device is investigated in this paper. The expression of voltage and power outputs are obtained by mathematical analysis in both series and multiple models. The simulation for the piezoelectric energy harvester is based on finite element method, and the characteristic relation of the physical dimensions, mass, spring stiffness coefficient and natural frequency is obtained. Finally, experiments are conducted to verify and study the influence on voltage output from excited frequency.