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Nondestructive Testing Using mm-Wave Sparse Imaging Verified for Singly Curved Composite Panels

Wingren, Niklas LU and Sjöberg, Daniel LU orcid (2022) In IEEE Transactions on Antennas and Propagation 71(1). p.1185-1189
Abstract
Nondestructive testing of composite materials is important in aerospace applications, and mm-wave imaging has been increasingly used for this purpose. Imaging is traditionally performed using Fourier methods, with inverse methods being an alternative. This communication presents a mm-wave imaging method with an inverse approach intended for nondestructive testing of singly curved composite panels with sparsely distributed flaws. It builds on previous work which was limited to imaging on planar panels. The move from planar to singly curved panels increases the applicability of the method for aerospace applications. The imaging method is reference-free due to a numerical source separation algorithm and exploits sparsity in reconstruction of... (More)
Nondestructive testing of composite materials is important in aerospace applications, and mm-wave imaging has been increasingly used for this purpose. Imaging is traditionally performed using Fourier methods, with inverse methods being an alternative. This communication presents a mm-wave imaging method with an inverse approach intended for nondestructive testing of singly curved composite panels with sparsely distributed flaws. It builds on previous work which was limited to imaging on planar panels. The move from planar to singly curved panels increases the applicability of the method for aerospace applications. The imaging method is reference-free due to a numerical source separation algorithm and exploits sparsity in reconstruction of scatterers. It is demonstrated using near-field measurements at 60 GHz of an industrially manufactured composite panel with deliberate flaws. Compared to a more traditional Fourier imaging method, our method generates images with higher resolution and higher dynamic range. Flaw detection is also easier using our method as it generates images with less background clutter. (Less)
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
image reconstruction, inverse problems, microwave imaging, nondestructive testing, source separation
in
IEEE Transactions on Antennas and Propagation
volume
71
issue
1
pages
5 pages
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85139832989
ISSN
0018-926X
DOI
10.1109/TAP.2022.3211341
language
English
LU publication?
yes
id
b7419707-feeb-4c9b-8e3f-34aac31fb457
date added to LUP
2022-10-21 14:33:29
date last changed
2024-03-06 16:05:08
@article{b7419707-feeb-4c9b-8e3f-34aac31fb457,
  abstract     = {{Nondestructive testing of composite materials is important in aerospace applications, and mm-wave imaging has been increasingly used for this purpose. Imaging is traditionally performed using Fourier methods, with inverse methods being an alternative. This communication presents a mm-wave imaging method with an inverse approach intended for nondestructive testing of singly curved composite panels with sparsely distributed flaws. It builds on previous work which was limited to imaging on planar panels. The move from planar to singly curved panels increases the applicability of the method for aerospace applications. The imaging method is reference-free due to a numerical source separation algorithm and exploits sparsity in reconstruction of scatterers. It is demonstrated using near-field measurements at 60 GHz of an industrially manufactured composite panel with deliberate flaws. Compared to a more traditional Fourier imaging method, our method generates images with higher resolution and higher dynamic range. Flaw detection is also easier using our method as it generates images with less background clutter.}},
  author       = {{Wingren, Niklas and Sjöberg, Daniel}},
  issn         = {{0018-926X}},
  keywords     = {{image reconstruction; inverse problems; microwave imaging; nondestructive testing; source separation}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{1}},
  pages        = {{1185--1189}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Antennas and Propagation}},
  title        = {{Nondestructive Testing Using mm-Wave Sparse Imaging Verified for Singly Curved Composite Panels}},
  url          = {{https://lup.lub.lu.se/search/files/126349997/FINAL_VERSION.pdf}},
  doi          = {{10.1109/TAP.2022.3211341}},
  volume       = {{71}},
  year         = {{2022}},
}