Apparatus for inspecting pipes in a plant
US4255762A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1979 |
| Grant date | Mar 10, 1981 |
| Priority date | — |
| Expiry date | Jul 12, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B23/2476
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for inspecting pipes in a plant, comprising an elongate inspection head portion which is provided with an optical system for receiving an inspection image by approaching an inner surface of a pipe being an object to-be-inspected; at least one proximity sensor which is disposed in the inspection head portion in order to detect a relative distance between the inspection head portion and the proximate object; a positioning mechanism which consists of a plurality of driving shafts for advancing or retreating, rotating, and revolving the inspection head portion; a control device which is capable of programmed operation and which drives and controls the positioning mechanism in a predetermined operation sequence programmed in advance; a data storage device which stores positional data of the respective driving shafts of the positioning mechanism; and an image processor which is disposed at a position remote from the inspection head portion and which reconstructs the inspection image from video signals; the control device controlling the positioning mechanism on the basis of an output signal from the proximity sensor, so that the inspection head portion can be moved and controll…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.