IEICE TRANSACTIONS on Electronics
Contrast Enhancement of 76.5 GHz-Band Millimeter-Wave Images Using Near-Field Scattering for Non-Destructive Detection of Concrete Surface Cracks
Summary :
This paper presents non-destructive millimeter-wave (MMW) imaging of sub-millimeter-wide cracks on a concrete surface covered with paper. We measured the near-field scattering of 76.5 GHz-MMW signals at concrete surface cracks for detection of the sub-millimeter-wide cracks. A decrease in the received signal magnitude by near-field scattering at the fine concrete surface crack was slight, which yielded an unclear MMW image contrast of fine cracks at the concrete surface. We have found that the received signal magnitude at concrete surface crack is larger than that at the surface without a crack, when the paper thickness is almost equal to n/4 of the effective wavelength of the MMW signal in the paper (n=1, 3, 5 ...), thus, making MMW image contrast at the surface crack reversed. By calculating the difference of two MMW images obtained from different paper thickness, we were able to improve the MMW image contrast at the surface crack by up to 3.3 dB.
- Publication
- IEICE TRANSACTIONS on Electronics Vol.E103-C No.5 pp.216-224
- Publication Date
- 2020/05/01
- Publicized
- 2019/12/06
- Online ISSN
- 1745-1353
- DOI
- 10.1587/transele.2019ECP5034
- Type of Manuscript
- PAPER
- Category
- Microwaves, Millimeter-Waves
Authors
Akihiko HIRATA
Chiba Institute of Technology
Makoto NAKASHIZUKA
Chiba Institute of Technology
Koji SUIZU
Chiba Institute of Technology
Yoshikazu SUDO
AIS-Engineering Co.
Keyword
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Akihiko HIRATA, Makoto NAKASHIZUKA, Koji SUIZU, Yoshikazu SUDO, "Contrast Enhancement of 76.5 GHz-Band Millimeter-Wave Images Using Near-Field Scattering for Non-Destructive Detection of Concrete Surface Cracks" in IEICE TRANSACTIONS on Electronics,
vol. E103-C, no. 5, pp. 216-224, May 2020, doi: 10.1587/transele.2019ECP5034.
Abstract: This paper presents non-destructive millimeter-wave (MMW) imaging of sub-millimeter-wide cracks on a concrete surface covered with paper. We measured the near-field scattering of 76.5 GHz-MMW signals at concrete surface cracks for detection of the sub-millimeter-wide cracks. A decrease in the received signal magnitude by near-field scattering at the fine concrete surface crack was slight, which yielded an unclear MMW image contrast of fine cracks at the concrete surface. We have found that the received signal magnitude at concrete surface crack is larger than that at the surface without a crack, when the paper thickness is almost equal to n/4 of the effective wavelength of the MMW signal in the paper (n=1, 3, 5 ...), thus, making MMW image contrast at the surface crack reversed. By calculating the difference of two MMW images obtained from different paper thickness, we were able to improve the MMW image contrast at the surface crack by up to 3.3 dB.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/transele.2019ECP5034/_p
Copy
@ARTICLE{e103-c_5_216,
author={Akihiko HIRATA, Makoto NAKASHIZUKA, Koji SUIZU, Yoshikazu SUDO, },
journal={IEICE TRANSACTIONS on Electronics},
title={Contrast Enhancement of 76.5 GHz-Band Millimeter-Wave Images Using Near-Field Scattering for Non-Destructive Detection of Concrete Surface Cracks},
year={2020},
volume={E103-C},
number={5},
pages={216-224},
abstract={This paper presents non-destructive millimeter-wave (MMW) imaging of sub-millimeter-wide cracks on a concrete surface covered with paper. We measured the near-field scattering of 76.5 GHz-MMW signals at concrete surface cracks for detection of the sub-millimeter-wide cracks. A decrease in the received signal magnitude by near-field scattering at the fine concrete surface crack was slight, which yielded an unclear MMW image contrast of fine cracks at the concrete surface. We have found that the received signal magnitude at concrete surface crack is larger than that at the surface without a crack, when the paper thickness is almost equal to n/4 of the effective wavelength of the MMW signal in the paper (n=1, 3, 5 ...), thus, making MMW image contrast at the surface crack reversed. By calculating the difference of two MMW images obtained from different paper thickness, we were able to improve the MMW image contrast at the surface crack by up to 3.3 dB.},
keywords={},
doi={10.1587/transele.2019ECP5034},
ISSN={1745-1353},
month={May},}
Copy
TY - JOUR
TI - Contrast Enhancement of 76.5 GHz-Band Millimeter-Wave Images Using Near-Field Scattering for Non-Destructive Detection of Concrete Surface Cracks
T2 - IEICE TRANSACTIONS on Electronics
SP - 216
EP - 224
AU - Akihiko HIRATA
AU - Makoto NAKASHIZUKA
AU - Koji SUIZU
AU - Yoshikazu SUDO
PY - 2020
DO - 10.1587/transele.2019ECP5034
JO - IEICE TRANSACTIONS on Electronics
SN - 1745-1353
VL - E103-C
IS - 5
JA - IEICE TRANSACTIONS on Electronics
Y1 - May 2020
AB - This paper presents non-destructive millimeter-wave (MMW) imaging of sub-millimeter-wide cracks on a concrete surface covered with paper. We measured the near-field scattering of 76.5 GHz-MMW signals at concrete surface cracks for detection of the sub-millimeter-wide cracks. A decrease in the received signal magnitude by near-field scattering at the fine concrete surface crack was slight, which yielded an unclear MMW image contrast of fine cracks at the concrete surface. We have found that the received signal magnitude at concrete surface crack is larger than that at the surface without a crack, when the paper thickness is almost equal to n/4 of the effective wavelength of the MMW signal in the paper (n=1, 3, 5 ...), thus, making MMW image contrast at the surface crack reversed. By calculating the difference of two MMW images obtained from different paper thickness, we were able to improve the MMW image contrast at the surface crack by up to 3.3 dB.
ER -
English
