Abstract
Authors developed concrete segment measurement system using CCD cameras, which is set on rotation unit for covering measurement area widely. For photogrammetry system, it is hard that a fixed facility system measure objects outside, because camera sometime changes their position by ground subsidence. But this system measure object accurately by calculating displacement of CCD camera using base point in case of the camera is set on swing unit roughly. And this system measure thickness of concrete deck slab and web plate by a measurement method, which is combined orientation of a single photograph and plane equation of segment section.
