Figure 6

Open-circuit output voltage.
(a) Open-circuit output voltage from 1 g to 7.0 g at resonant frequency. (b) The output open-circuit voltages of the harvester when it is excited under different accelerations from 0.5 g to 3.0 g.

Open-circuit output voltage.
(a) Open-circuit output voltage from 1 g to 7.0 g at resonant frequency. (b) The output open-circuit voltages of the harvester when it is excited under different accelerations from 0.5 g to 3.0 g.