A pipe-profiling adapter for CCTV inspection cameras: development of a pipe-profiling instrument

The principle of the optical section has been used to develop a profiling attachment for CCTV pipe inspection cameras. A light source, placed in front of the camera, projects a ring of light onto the pipe wall which is then viewed by the camera. Any distortion in the pipe wall will be made visible by the light ring. The CCTV image is digitized by an electronic frame grabber and the light ring image is located by specially developed pattern-matching software. The device has been used to examine pipe degradation both in sewers and water mains. (Abstract quotes from original text)