鉄道橋検査を目的とした遠隔非接触測定技術の開発

摘要

度重なる自然災害や社会ィンブラの老朽化などの課題 を抱えるわが国では，鉄道においてもこれを支える構造 物の検査技術の高度化が必須の課題となっている。そこ で鉄道総研では，構造物検査に非接触測定技術を適用 することによって，高所作業や線路内への立ち入り作業 を省略し，検査作業を安全化，効率化するための技術開 発に取り組んできた。これまで，レーザを用いた遠隔位 置からの非接触振動測定技術を検査業務に適用した検査 手法の開発や技術の普及を進めるとともに，無人航空機 (UAV: Unmanned Aerial Vehicle)等の新技術活用の検 討を進めてきた。%Remote non-contact measuring systems for the health monitoring of railway bridges were newly developed by RTRI. In this report, U-Doppler II which is a new model of a non-contact vibration measurement system intended to be used at railway companies is introduced first. A method for efficiently estimating the natural frequencies and the tensile forces of cable stayed bridge cables was proposed using long-distance U-Doppler which was developed for the inspection of long-span bridges and continuous rigid-frame viaducts. Furthermore, an unmanned aerial vehicle (UAV) for structural inspection was developed that can run under the structure surface by a continuous track to shoot harmful alteration areas.