NDLI: High-resolution imaging of damaged wooden structures for building inspection by polarimetric radar

Content Provider	IEEE Xplore Digital Library
Author	Liu, H. Koyama, C.N. Takahashi, K. Sato, M.
Copyright Year	2014
Description	Author affiliation: Tohoku Univ., Sendai, Japan (Liu, H.; Koyama, C.N.; Takahashi, K.; Sato, M.)
Abstract	A full-polarimetric radar system for non-contact, non-destructive high-resolution imaging and inspection of wooden buildings damaged by earthquakes is developed. The stepped frequency continuous wave system is based on a network analyzer and employs a multi-channel antenna array consisting of four linearly polarized Vivaldi antennas operating in an ultra-wideband ranging from 1 GHz to 20 GHz. The signal processing methods for high-resolution 3D imaging and polarimetric analysis are introduced in this paper. We conducted two-dimensional scans on damaged wooden wall specimens in the laboratory. The measurement is carried out at a five mm step. The results indicate that the microwaves up to 20 GHz can penetrate the wooden walls. Cracks and deformations of wooden structures inside the wall, as well as of metal nails and bolts can be clearly imaged. The observed radar signatures related to the damaged wooden structures are discussed. Our findings demonstrate that the polarimetric radar technique is able to provide richer information than conventional single-polarization subsurface penetrating radar.
Starting Page	423
Ending Page	428
File Size	2583167
Page Count	6
File Format	PDF
ISBN	9781479967896
DOI	10.1109/ICGPR.2014.6970459
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-30
Publisher Place	Belgium
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Non-destructive testing (NDT) damaged wooden structures high-resolution imaging Imaging Radar imaging Radar polarimetry Sensors polarimetric radar Antennas Synthetic aperture radar
Content Type	Text
Resource Type	Article

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