成果報告書詳細
管理番号20160000000472
タイトル*平成27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 点検・診断技術の実用化に向けた研究開発 高速走行型非接触レーダーによるトンネル覆工の内部欠陥点検技術と統合型診断システムの開発
公開日2016/9/7
報告書年度2015 - 2015
委託先名パシフィックコンサルタンツ株式会社
プロジェクト番号P14031
部署名ロボット・AI部
和文要約
英文要約Title: Cross-ministerial Strategic Innovation Promotion Program / Maintenance, Renewal and Management for Infrastructure / Study on Practical Use of Inspection and Diagnostics Technique / Development of Internal Defect Inspection for Tunnel Lining using High-speed Mobile-type Non-contact Radar and Integrated Soundness Assessment Systems (FY2014-FY2016) FY2015 Annual Report

1. Outline: The purpose of this study is to develop an inspection technology detecting the defects in concrete using rapidly scannable non-contact radar as a complement of hammering test. Further expecting ultimate purpose is to develop a synthetic diagnosis system to assess the soundness comprehensively as well as a database compilation of various unsoundness conditions including inner defects by a 3D visualizing technology.
2. Development on radar antennas: Our technical team has developed non-contact radar system successfully. This radar system has 3 antennas in order to cover wide area of inner defects. The features of this system are as follows;
1) Target of inner defects; discontinuous joints, honeycombs and poor material quality that do not involve cracking, water leakage, and target of detecting distance to target from antenna is almost 3m.
2) Details of this radar system; radar type: 3 hone antennas (FM-CW type), maximum detectable distance: 4m, distance resolution: 0.025m (in concrete), medium frequency: 3Ghz (frequency range: 2Ghz).
3) The results of practically verification; Detecting test was carried out in actual full-scale testing tunnel, where has some artificial defects such as honeycombs, inner discontinuous voids. The antenna is capable enough to provide us fully satisfied results under the condition of 3m apart from the target.
3. 3D visualizing technology of inspection results: Point clouds analysis function and the function for visualization of inspection results are the 2 major functions to be developed. Point clouds analysis function was developed to define the lining joint, and to extract the trajectory of tunnel lining and the tunnel cross section at every specific span. Of visualizing function of inspection results, the function with an ability to positionally synchronize the data obtained from radar measurements and analysis results such as inner defects, lining thickness, and back lining cavity was developed to make 3D visualized model with contour map, horizontal and vertical cross sectional map.
4. Summary: The team set out to develop a high-speed mobile non-contact radar system for inner defects detection, and achieved certain positive results. The next plans include the examination of inspection accuracy and verification by practical application in more than actual tunnels, as well as the development of a supplementary technology to hammering test. The team is also planning to develop a database system with the 3D visualyzing technology to further contribute to the efforts to enhance the effectiveness of inspection.
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