鉄道構造物の遠隔非接触検査技術の開発

－レーザードップラー振動計測とドローン計測の応用事例－

抄録

　　　In this report, the remote non-contact measuring systems which were developed by RTRI were introduced for the health monitoring of railway structures. Three types of ‘U-Doppler’ systems were produced by improving the laser Doppler vibrometer. Furthermore, the unmanned aerial vehicles for structure inspection were developed installing a stereo camera, crawlers, and a hammering test device. By using these inspection systems, we proposed new and efficient inspection techniques for the cable tension of cable-stayed bridge, the harmful alteration of bridge girder surface, the material properties of RC members, and the rockfall risk of rock slope along railway tracks.