Development of 3D microwave imaging technology for damage assessment of concrete bridge.

Feng, Maria Q.; De Flaviis, Franco; Kim, Yoo Jin; Ko, Hyunseok; Liu, Sunan; University of California, Irvine. Department of Civil and Environmental Engineering

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ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.

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Development of 3D microwave imaging technology for damage assessment of concrete bridge.

2003-11-01
By Feng, Maria Q. ; De Flaviis, Franco ; Kim, Yoo Jin ; ...

[PDF-3.08 MB]

English

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Alternative Title:

Development of 3-dimensional microwave imaging technology for damage assessment of concrete bridge.;Development of three-dimensional microwave imaging technology for damage assessment of concrete bridge.;
Creators:

Feng, Maria Q. ; De Flaviis, Franco ; Kim, Yoo Jin ; Ko, Hyunseok ; Liu, Sunan

Feng, Maria Q. ; De Flaviis, Franco ; Kim, Yoo Jin ; Ko, Hyunseok ; Liu, Sunan Less -
Corporate Creators:

University of California, Irvine. Department of Civil and Environmental Engineering
Corporate Contributors:

United States. Federal Highway Administration
Subject/TRT Terms:

[+]

California Concrete Bridges Inspection Microwave Imaging Three-dimensional Imaging
Publication/ Report Number:

CA03-0272 ; FHWA/CA/IR/2004/02

CA03-0272 ; FHWA/CA/IR/2004/02 Less -
Resource Type:

Tech Report
Geographical Coverage:

California
Corporate Publisher:

California. Dept. of Transportation. Division of Research and Innovation
Abstract:

An innovative microwave 3-dimensional (3D) sub-surface imaging technology is developed for

detecting and quantitatively assessing internal damage of concrete structures. This technology is

based on reconstruction of dielectric profile (image) of a structure illuminated with microwaves

sent and received by antenna arrays. In this project, it is found that focused microwave is much

more effective than the unfocused ones in detecting small defects, and thus a unique numerical

bi-focusing technique is developed to focus both the transmitting and the receiving microwave

signals. A multi-frequency technique is applied to improve the image clarity by reducing the

background noises. Two software packages have been developed in this study: one for 3D image

reconstruction and the other for image visualization. Two engineering prototypes have been

fabricated: one consists of arrays of 128 antennas and the other 256 antennas with sophisticated

electronic switching controlled by software. The first prototype system is tested on concrete

blocks, in which voids and steel bars are successfully detected. It was experimentally

demonstrated that bi-focusing operator can double the image resolution.
Format:

PDF
Funding:

65A0140
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:d7a07829b3acffea277a89a94276486737361bcc614557f3fe7aa24acb2c2afa
Download URL:

https://rosap.ntl.bts.gov/view/dot/27546/dot_27546_DS1.pdf
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Development of 3D microwave imaging technology for damage assessment of concrete bridge.

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