Due to the revision of the law, it became mandatory to conduct close visual inspection for all bridges every five years in 2014. Cables in cable-stayed bridges have been inspected visually using binoculars from the road surface, using aerial work platforms or using climbing techniques. However, these methods have problems such as safety concerns and long working time. To overcome these problems, the authors have developed a robot making it possible to approach and inspect cables safely and quickly. In this report, the feature of the cable inspection robot and examples of the inspect results using this robot are described.
