Numerical Modeling of Nondestructive Testing of Various Conductive Objects inside Metal Enclosures Using ELF/VLF Magnetic Fields
Nondestructive evaluation of various conductive objects through metal enclosures is investigated by using ELF/VLF magnetic induction fields in detailed simulations. ELF/VLF magnetic fields (<30 kHz) have a unique ability to penetrate highly conductive or permeable shields. Using a magnetic dipole...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-04-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/11/8/3665 |
| _version_ | 1797537213855039488 |
|---|---|
| author | Hoyoung Kim Vijay Harid |
| author_facet | Hoyoung Kim Vijay Harid |
| author_sort | Hoyoung Kim |
| collection | DOAJ |
| description | Nondestructive evaluation of various conductive objects through metal enclosures is investigated by using ELF/VLF magnetic induction fields in detailed simulations. ELF/VLF magnetic fields (<30 kHz) have a unique ability to penetrate highly conductive or permeable shields. Using a magnetic dipole source antenna, objects hidden inside a metal enclosure are imaged via examining distortions to the field outside the enclosure. The field distortion is parametrically studied by varying the size, conductivity, and permeability of the hidden objects. Furthermore, the importance of the conductivity of the enclosure itself is investigated using both low (10<sup>6</sup> S/m) and high (10<sup>8</sup> S/m) conductivity metallic shields. It is shown that the responses are quite sensitive to the object and shield parameters; both qualitative and quantitative properties of the field distortions are described in detail. The simulation results suggest that properties of hidden conductive or permeable objects, over a relatively wide range of parameters (both geometry and material), can be inferred nondestructively using ELF/VLF magnetic induction fields. |
| first_indexed | 2024-03-10T12:11:54Z |
| format | Article |
| id | doaj.art-ce65324649034db2866b89dcdb23f44f |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T12:11:54Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-ce65324649034db2866b89dcdb23f44f2023-11-21T16:09:57ZengMDPI AGApplied Sciences2076-34172021-04-01118366510.3390/app11083665Numerical Modeling of Nondestructive Testing of Various Conductive Objects inside Metal Enclosures Using ELF/VLF Magnetic FieldsHoyoung Kim0Vijay Harid1Department of Electrical Engineering, University of Colorado Denver, Denver, CO 80204, USADepartment of Electrical Engineering, University of Colorado Denver, Denver, CO 80204, USANondestructive evaluation of various conductive objects through metal enclosures is investigated by using ELF/VLF magnetic induction fields in detailed simulations. ELF/VLF magnetic fields (<30 kHz) have a unique ability to penetrate highly conductive or permeable shields. Using a magnetic dipole source antenna, objects hidden inside a metal enclosure are imaged via examining distortions to the field outside the enclosure. The field distortion is parametrically studied by varying the size, conductivity, and permeability of the hidden objects. Furthermore, the importance of the conductivity of the enclosure itself is investigated using both low (10<sup>6</sup> S/m) and high (10<sup>8</sup> S/m) conductivity metallic shields. It is shown that the responses are quite sensitive to the object and shield parameters; both qualitative and quantitative properties of the field distortions are described in detail. The simulation results suggest that properties of hidden conductive or permeable objects, over a relatively wide range of parameters (both geometry and material), can be inferred nondestructively using ELF/VLF magnetic induction fields.https://www.mdpi.com/2076-3417/11/8/3665extremely and very low frequencyelectromagnetic near fieldnondestructive evaluationinduced surface current |
| spellingShingle | Hoyoung Kim Vijay Harid Numerical Modeling of Nondestructive Testing of Various Conductive Objects inside Metal Enclosures Using ELF/VLF Magnetic Fields Applied Sciences extremely and very low frequency electromagnetic near field nondestructive evaluation induced surface current |
| title | Numerical Modeling of Nondestructive Testing of Various Conductive Objects inside Metal Enclosures Using ELF/VLF Magnetic Fields |
| title_full | Numerical Modeling of Nondestructive Testing of Various Conductive Objects inside Metal Enclosures Using ELF/VLF Magnetic Fields |
| title_fullStr | Numerical Modeling of Nondestructive Testing of Various Conductive Objects inside Metal Enclosures Using ELF/VLF Magnetic Fields |
| title_full_unstemmed | Numerical Modeling of Nondestructive Testing of Various Conductive Objects inside Metal Enclosures Using ELF/VLF Magnetic Fields |
| title_short | Numerical Modeling of Nondestructive Testing of Various Conductive Objects inside Metal Enclosures Using ELF/VLF Magnetic Fields |
| title_sort | numerical modeling of nondestructive testing of various conductive objects inside metal enclosures using elf vlf magnetic fields |
| topic | extremely and very low frequency electromagnetic near field nondestructive evaluation induced surface current |
| url | https://www.mdpi.com/2076-3417/11/8/3665 |
| work_keys_str_mv | AT hoyoungkim numericalmodelingofnondestructivetestingofvariousconductiveobjectsinsidemetalenclosuresusingelfvlfmagneticfields AT vijayharid numericalmodelingofnondestructivetestingofvariousconductiveobjectsinsidemetalenclosuresusingelfvlfmagneticfields |