Electric energy harvester using ultrasonic wave

Patent metadata

Field	Value
Publication number	US-2017005258-A1
Application number	US-201615200591-A
Country	US
Kind code	A1
Filing date	Jul 1, 2016
Priority date	Jul 3, 2015
Publication date	Jan 5, 2017
Grant date	—

Abstract

There is provided an electric energy generator system comprising: an ultrasonic-wave emission device configured to generate an ultrasonic-wave and emit the ultrasonic-wave; and an electric energy generator device configured to generate an electric energy upon a receipt of the emitted ultrasonic-wave.

First claim

What is claimed is:

1 . An electric energy generator system comprising:
an ultrasonic-wave emission device configured to generate an ultrasonic-wave and emit the ultrasonic-wave; and an electric energy generator device configured to generate an electric energy upon a receipt of the emitted ultrasonic-wave.

2 . The system of claim 1 , wherein the ultrasonic-wave emission device comprises:
an ultrasonic-wave generator configured to generate the ultrasonic-wave; and ultrasonic-wave emitter configured to emit the generated ultrasonic-wave.

3 . The system of claim 1 , wherein the electric energy generator device has a closed inner space defined therein and the electric energy generator device is insertable into a living body.

4 . The system of claim 1 , wherein the electric energy generator device comprises:
a substrate; an electrode on the substrate; a first friction-charged member on the electrode; a spacer disposed on the substrate so as to surround the electrode and the first friction-charged member; and a second friction-charged member disposed on the spacer to be spaced from the first friction-charged member, wherein the second friction-charged member repeatedly contacts or is separated from the first friction-charged member, wherein a closed inner space is defined between the first friction-charged member and the second friction-charged member and the spacer, wherein when the electric energy generator device receives the emitted ultrasonic-wave, a pressure in the inner space changes, to allow deformation of the second friction-charged member and thus repetitions of the contact and separation between the first and second friction-charged members, to generate a triboelectric energy.

5 . The system of claim 4 , further comprising a load electrically coupled to the electrode.

6 . The system of claim 5 , wherein the load includes an electric device, an electronic device or a condenser.

7 . The system of claim 5 , further comprising a rectifier diode electrically coupled to and between the electrode and the load.

8 . The system of claim 1 , wherein the ultrasonic-wave has an intensity smaller than or equal to 1 W/cm 2 .

9 . The system of claim 1 , wherein the ultrasonic-wave has a frequency of 20 kHz to 50 kHz.

10 . The system of claim 1 , wherein the electric energy generator device comprises:
a lower substrate; a lower electrode on the lower substrate; a piezoelectric layer on the lower electrode; an upper electrode on the piezoelectric layer; an insulator disposed on the lower substrate so as to surround the lower electrode, the piezoelectric layer and the upper electrode; and an upper substrate disposed on the upper electrode and the insulator, wherein when the electric energy generator device receives the emitted ultrasonic-wave, the electric energy generator device vibrates and thus the piezoelectric layer deforms to generate an electric energy.

11 . The system of claim 1 , wherein the electric energy generator device comprises:
a lower substrate; a lower electrode on the lower substrate; a first electret on the lower electrode; a spacer disposed on the lower substrate so as to surround the lower electrode and the first electret; a second electret disposed on the spacer to be spaced from the first electret, wherein the first and second electrets have opposite polarization directions to each other; an upper electrode on the second electret; an insulator disposed on the spacer so as to surround the second electret and the upper electrode; and an upper substrate disposed on the upper electrode and the insulator, wherein a closed inner space is defined between the first electret and the second electret and the spacer, wherein when the electric energy generator device receives the emitted ultrasonic-wave, a pressure in the inner space changes, to change a spacing between the first electret and the second electret to generate an electric energy.

12 . The system of claim 1 , wherein the electric energy generator device comprises:
a lower substrate; a lower electrode on the lower substrate; an electret on the lower electrode; a spacer disposed on the lower substrate so as to surround the lower electrode and the electret; an upper electrode disposed on the spacer to be spaced from the electret; an insulator disposed on the spacer so as to surround the upper electrode; and an upper substrate disposed on the upper electrode and the insulator, wherein a closed inner space is defined between the electret and the upper electrode and the spacer, wherein when the electric energy generator device receives the emitted ultrasonic-wave, a pressure in the inner space changes, to change a spacing between the electret and the upper electrode to generate an electric energy.

13 . The system of claim 1 , wherein the electric energy generator device comprises:
a lower substrate; a lower electrode on the lower substrate; a spacer disposed on the lower substrate so as to surround the lower electrode; an electret disposed on the spacer to be spaced from the lower electrode; an upper electrode disposed on the electret; an insulator disposed on the spacer so as to surround the upper electrode and the electret; and an upper substrate disposed on the upper electrode and the insulator, wherein a closed inner space is defined between the electret and the lower electrode and the spacer, wherein when the electric energy generator device receives the emitted ultrasonic-wave, a pressure in the inner space changes, to change a spacing between the electret and the lower electrode to generate an electric energy.

14 . The system of claim 10 , further comprising a load electrically coupled to the lower electrode and the upper electrode.

15 . The system of claim 14 , further comprising a rectifier diode electrically coupled to and between the lower electrode and the load and/or between the upper electrode and the load.

16 . The system of claim 1 , wherein the electric energy generator device comprises:
a lower substrate having a coil buried therein; an electrode on the lower substrate; a first friction-charged member on the electrode; a spacer disposed on the lower substrate so as to surround the electrode and the first friction-charged member; a second friction-charged member disposed on the spacer to be spaced from the first friction-charged member, wherein the second friction-charged member repeatedly contacts or is separated from the first friction-charged member; and an upper substrate on the second friction-charged member, wherein the upper substrate is magnetic, wherein a closed inner space is defined between the first friction-charged member and the second friction-charged member and the spacer, wherein when the electric energy generator device receives the emitted ultrasonic-wave, a pressure in the inner space changes, to deform the second friction-charged member to generate a first electric energy via a triboelectric effect between the first and second friction-charged members and a second electric energy via an electromagnetic induction between the upper and lower substrates.

17 . The system of claim 1 , wherein the electric energy generator device comprises:
a lower substrate having a coil buried therein; an electrode on the lower substrate; a first electret on the electrode; a spacer disposed on the lower substrate so as to surround the electrode and the first electret; a second electret disposed on the spacer to be spaced from the first electret, wherein the first and second electre

Assignees

• Univ Sungkyunkwan Res & Bus

Inventors

• Kim Sang Woo
• HINCHET Ronan
• Kim Seong Su
• Seung Wan Chul
• Yoon Hong Joon
• Lee Ju-Hyuck
• Khan Usman

Classifications

• A61N1/3787

  from an external energy source · CPC title

• B06B1/0207

  Driving circuits (specially adapted for particular applications, see the relevant subclass, e.g. G01; circuits for steering transducer arrays G10K11/34; basic circuits H03) · CPC title

• H02N2/18

  producing electrical output from mechanical input, e.g. generators (for measurement devices G01) · CPC title

• H01L41/113 Primary

  Electricity · mapped topic

• B06B1/02

  making use of electrical energy (B06B1/18, B06B1/20 take precedence) · CPC title