We have developed a displacement measuring technique for detailed noncontact mapping of the interior geometry of pipes. The technique, which is based on optical measurement by triangulation, uses a laser-beam scanner to measure radial displacement. A prototype system features radial-section, axial-section, and three-dimensional rendering of the inspected pipe interior, high accuracy 1 mm for a 20-60 mm radius, non-contact measurement, and front video images provided by a CCD camera. This paper describes the pipe-measurement system, including the measuring method, signal processing, data transmission, automated data-acquisition, and 3D rendering of the interior.
|Number of pages||10|
|Journal||NTT R and D|
|Publication status||Published - 1993 Dec 1|
ASJC Scopus subject areas
- Electrical and Electronic Engineering