Non-destructive inspection of buildings using radar polarimetry

Saika Okamura, Kazunori Takahashi, Motoyuki Sato

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

7 Citations (Scopus)

Abstract

Natural disasters such as earthquakes often occur in Japan. Houses and buildings are broken due to earthquakes. It is difficult to know how much damage is caused inside a wall only by a visual observation. GB-SAR (Ground-Based Synthetic Aperture Radar) measurement is a way to measure the inside of a wall as a nondestructive inspection. By using GB-SAR, it can measure the inside without contacting a wall. In this study, imaging latticed rebars and damages inside a wall is an objective. For the study, a polarimetric radar system was built based on a vector network analyzer (VNA). Spiral antennas were used to achieve a wide frequency bandwidth. We carried out measurements with 2-dimentional scan. The scanning was repeated three times with different combinations of polarization, i.e., LL, RR, and LR. These radar data could image all the rebars. The measured data in the circular polarization basis are transformed to the linear polarization, i.e., HH, VV and HV. The obtained radar image in the HH polarization shows an only horizontally placed rebars and VV shows only vertical one.

Original languageEnglish
Title of host publicationConference Proceedings of 2013 Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2013
Pages122-125
Number of pages4
Publication statusPublished - 2013 Dec 1
Event2013 4th Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2013 - Tsukuba, Japan
Duration: 2013 Sep 232013 Sep 27

Publication series

NameConference Proceedings of 2013 Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2013

Other

Other2013 4th Asia-Pacific Conference on Synthetic Aperture Radar, APSAR 2013
CountryJapan
CityTsukuba
Period13/9/2313/9/27

ASJC Scopus subject areas

  • Computer Networks and Communications

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