成果報告書詳細
管理番号20150000000459
タイトル*平成26年度中間年報 SIP(戦略的イノベーション創造プログラム) インフラ維持管理・更新・マネジメント技術 モニタリングシステムの現場実証 衛星及びソナーを利用した港湾施設のモニタリングシステムの構築の研究開発
公開日2015/7/18
報告書年度2014 - 2014
委託先名五洋建設株式会社 独立行政法人宇宙航空研究開発機構
プロジェクト番号P14031
部署名ロボット・機械システム部
和文要約
英文要約Title:Development of the Monitoring System for Port Facilities using Satellite and SONAR(FY2014-FY2016) FY2014 Annual Report

(1)Enforcement item 1
In this project, we aim to develop an advanced monitoring system based on remote sensing technology for port facilities.
In order for an accurate emergency monitoring of port facilities, we assessed the widely used Differential Interferometric Synthetic Aperture Radar (DInSAR) methods among the Advanced Land Observing Satellite (ALOS) / Phased Array type L-band Synthetic Aperture Radar (PALSAR) datasets which observed Ishinomaki port and Onahama port. Those ports were severely damaged by tsunami in the 2011 off the Pacific coast of Tohoku Earthquake. Experimental results showed that those standard methods can roughly show the damaged parts in the ports. However, there are some difficulties in measuring the displacements of each facility. We additionally used the newly launched ALOS-2 / PALSAR-2 datasets in order to see the improvement of the instruments. By observing Nagata port and Suma port which were damaged by typhoon in 2014, PALSAR-2 showed us that it is possible to measure smaller facilities such as tetrapod, difficult target for PALSAR. The difficulties found in those experiments will be solved in the following years.
In the research of periodic monitoring with multi-temporal InSAR analysis, we have developed an algorithm calculating deformation of ground targets from raw satellite ALOS imagery and evaluated its accuracy by use of ground deformation measurement data at the Kansai International Airport. The evaluation shows feasibility of application of the multi-temporal InSAR analysis to the periodic monitoring system since the time-series subsidence on a runway is accurately measured in cm order from the InSAR measurement. Additionally a deformation map processed from the algorithm qualitatively visualizes subsidence area around the airport. This shows we might be able to monitor with the subsidence map to locate hazardous area and to make ground inspection so that we effectively detect risks of the infrastructures. Although the research is conducted with ALOS achieve data since the number of ALOS-2 data is insufficient for multi-temporal InSAR analysis, theoretical increase of measurement accuracy with ALOS-2 has possibility to realize the monitoring system from the space satellite.
(2)Enforcement item 2
Installation of the structure which imitated port facilities was considered for verification of satellite data. Consequently, it was checked that it is verifiable with the tetrapod of 2t class, and the artificial structure was designed.
The survey data in case of the East Japan great earthquake of the Onahama port and the Ishinomaki port was collected and arranged for satellite data verification. In addition, the examples of the subsidence damage of a tetrapod were collected and it provided for enforcement item (1).
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