Abstract
The Gifu University SIP implementation team (GU-SIP team) is conducting activities to adopt robot technology (RT) into the legal periodical inspection of Kakamigahara Bridge (long-span PC bridge). Based on the guidelines (draft) proposed by a committee of the GU-SIP team, we planned to adopt two-step inspections. In the first step, "preliminary survey" is carried out by using RT. In the second step, "close visual inspection" is conducted on the whole bridge by utilizing the results of the preliminary survey. Performance requirements were established for RT. The performance of RT was then verified. For the RT, we requested that its performance allows us to judge whether or not the soundness class of the structural member under inspection is "II or more". In the "preliminary survey", an RT system combining three drone systems and two robot camera systems was used. We proposed a method in which one drone system detects damage other than concrete cracks on the entire bridge from a short distance and then the RT system with a high-resolution camera detects concrete cracks.
