Rapid and wireless screening and health monitoring of materials and structures

Patent metadata

Field	Value
Publication number	US-10557763-B2
Application number	US-201816235881-A
Country	US
Kind code	B2
Filing date	Dec 28, 2018
Priority date	Dec 22, 2017
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

Systems for screening and health monitoring of materials are provided. The system can include a material embedded with magneto-electric nanoparticles (MENs), a laser configured to direct incident laser light waves at a target area of the material, an optical filter disposed between the laser and the material, and an analyzer configured to detect the laser light reflected from the material.

First claim

What is claimed is:

1. A system for screening and health monitoring of materials, the system comprising:
a material embedded with magneto-electric nanoparticles (MENs);
a conductive coil disposed at a target position on a surface of the material;
a power source electrically connected to the conductive coil; and
an analyzer configured to detect whether a structural defect is present in the material by detecting magnetic characteristics of the conductive coil and using BH-looper magnetometry.

2. The system according to claim 1 , the MENs being comprised of a ferromagnetic core and a piezoelectric shell surrounding the ferromagnetic core.

3. The system according to claim 2 , the ferromagnetic core being comprised of cobalt ferrite (CoFe 2 O 4 ).

4. The system according to claim 3 , the piezoelectric shell being comprised of barium titanate (BaTiO 3 ).

5. The system according to claim 2 , the piezoelectric shell being comprised of barium titanate (BaTiO 3 ).

6. The system according to claim 1 , a diameter of the MENs being a width within a range of from 10 nm to over 100 nm.

7. The system according to claim 1 , the conductive coil being a single turn coil.

8. The system according to claim 1 , the conductive coil being a multi-turn coil.

9. The system according to claim 1 , the power source being configured to transmit an alternating current (AC) signal to the conductive coil in a range of from 100 Hz to 1 GHz.

10. The system according to claim 1 , the analyzer being further configured to:
cause an alternating current (AC) signal to be transmitted to the conductive coil in a range of from 100 Hz to 1 GHz;
detect a signal response over the range; and
generate an M-H hysteresis loop.

11. A method for screening and health monitoring of materials, the method comprising:
embedding a material with magneto-electric nanoparticles (MENs); and
providing a conductive coil disposed at a target position on a surface of the material;
providing a power source electrically connected to the conductive coil;
providing an analyzer configured to detect magnetic characteristics of the conductive coil; and
detecting, by the analyzer, whether a structural defect is present by measuring a magnetization at a local region of the material by causing an alternating current (AC) signal to be transmitted to the conductive coil in a range of from 100 Hz to 1 GHz, detecting a signal response over the range, generating an M-H hysteresis loop, and using BH-looper magnetometry.

12. The method according to claim 11 , the MENs being comprised of a ferromagnetic core and a piezoelectric shell surrounding the ferromagnetic core.

13. The method according to claim 12 , the ferromagnetic core being comprised of cobalt ferrite (CoFe 2 O 4 ).

14. The method according to claim 13 , the piezoelectric shell being comprised of barium titanate (BaTiO 3 ).

15. The method according to claim 12 , the piezoelectric shell being comprised of barium titanate (BaTiO 3 ).

16. The method according to claim 11 , a diameter of the MENs being within a range of from 10 nm to over 100 nm.

17. The method according to claim 11 , the conductive coil being a single turn coil.

18. The method according to claim 11 , the conductive coil being a multi-turn coil.

19. The method according to claim 11 , the power source being configured to transmit the AC signal to the conductive coil in the range of from 100 Hz to 1 GHz.

20. A system for screening and health monitoring of materials, the system comprising:
a material embedded with magneto-electric nanoparticles (MENs);
a conductive coil disposed at a target position on a surface of the material;
a power source electrically connected to the conductive coil; and
an analyzer configured to detect whether a structural defect is present in the material by detecting magnetic characteristics of the conductive coil and using BH-looper magnetometry,
the MENs being comprised of a ferromagnetic core and a piezoelectric shell surrounding the ferromagnetic core,
the ferromagnetic core being comprised of cobalt ferrite (CoFe 2 O 4 ),
the piezoelectric shell being comprised of barium titanate (BaTiO 3 ),
a diameter of the MENs being a width within a range of from 10 nm to over 100 nm,
the power source being configured to transmit an alternating current (AC) signal to the conductive coil in a range of from 100 Hz to 1 GHz, and
the analyzer being further configured to:
cause the AC signal to be transmitted to the conductive coil in the range of from 100 Hz to 1 GHz;
detect a signal response over the range; and
generate an M-H hysteresis loop.

Assignees

• Khizroev Sakhrat
• Guduru Rakesh
• Mcdaniel Dwayne
• The Florida International Univ Board Of Trustees

Inventors

• Khizroev Sakhrat
• Guduru Rakesh
• Mcdaniel Dwayne

Classifications

• H01F1/0054

  Coated nanoparticles, e.g. nanoparticles coated with organic surfactant · CPC title

• G01L1/12

  by measuring variations in the magnetic properties of materials resulting from the application of stress · CPC title

• H01F1/344

  Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4 · CPC title

• G02B27/288 Primary

  Filters employing polarising elements, e.g. Lyot or Solc filters (G02B5/3016 takes precedence) · CPC title

• H01F27/255

  made from particles (H01F27/26 takes precedence) · CPC title