Patent ID: 11870372
Assignee: THE JOHNS HOPKINS UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An energy harvesting system, comprising:
an energy harvesting device, comprising:
a piezoelectric harvester comprising a first piezoelectric electrode, a second piezoelectric electrode, and a piezoelectric nanocomposite positioned between the first piezoelectric electrode and the second piezoelectric electrode, wherein the piezoelectric nanocomposite provides a cylinder having a longitudinal axes that extends through the cylinder; and
an electrostatic harvester comprising a first electrostatic electrode, a second electrostatic electrode, and an electret film positioned between the first electrostatic electrode and the second electrostatic electrode;
a piezoelectric energy harvesting circuit electrically coupled to the piezoelectric harvester, wherein the piezoelectric energy harvesting circuit is configured to convert piezoelectric energy to electric energy;
an electrostatic energy harvesting circuit electrically coupled to the electrostatic harvester, wherein the electrostatic energy harvesting circuit is configured to convert electrostatic energy to electric energy; and
an electric energy storage system electrically coupled to the piezoelectric energy harvesting circuit and the electrostatic energy harvesting circuit.