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

H. Liu, C. N. Koyama, Kazunori Takahashi, Motoyuki Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

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.

Original languageEnglish
Title of host publicationProceedings of the 15th International Conference on Ground Penetrating Radar, GPR 2014
EditorsLara Pajewski, Christophe Craeye, Antonis Giannopoulos, Frederic Andre, Sebastien Lambot, Evert Slob
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages423-428
Number of pages6
ISBN (Electronic)9781479967896
DOIs
Publication statusPublished - 2014 Dec 1
Event15th International Conference on Ground Penetrating Radar, GPR 2014 - Brussels, Belgium
Duration: 2014 Jun 302014 Jul 4

Publication series

NameProceedings of the 15th International Conference on Ground Penetrating Radar, GPR 2014

Other

Other15th International Conference on Ground Penetrating Radar, GPR 2014
CountryBelgium
CityBrussels
Period14/6/3014/7/4

Keywords

  • Non-destructive testing (NDT)
  • damaged wooden structures
  • high-resolution imaging
  • polarimetric radar

ASJC Scopus subject areas

  • Environmental Engineering
  • Computer Networks and Communications
  • Signal Processing
  • Geotechnical Engineering and Engineering Geology
  • Electrical and Electronic Engineering

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  • Cite this

    Liu, H., Koyama, C. N., Takahashi, K., & Sato, M. (2014). High-resolution imaging of damaged wooden structures for building inspection by polarimetric radar. In L. Pajewski, C. Craeye, A. Giannopoulos, F. Andre, S. Lambot, & E. Slob (Eds.), Proceedings of the 15th International Conference on Ground Penetrating Radar, GPR 2014 (pp. 423-428). [6970459] (Proceedings of the 15th International Conference on Ground Penetrating Radar, GPR 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICGPR.2014.6970459