Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1995-06-06
1997-08-05
Font, Frank G.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356320, 356237, 25055924, G01N 2100
Patent
active
056547951
ABSTRACT:
A visual inspection apparatus (18) is disclosed for viewing welds between pipe sections (26, 28). The apparatus (18) can be part of a combination plug clamp and inspection apparatus (12) or used independently of the plug clamp (12). The TV camera (20) is aimed along the center line axis (52) of the apparatus and pipeline and a mirror (76) reflects the image of a portion of the weld into the lens of the camera. The mirror can be rotated to allow the entire circumference of the weld to be inspected. A weighted ring (102) provides a reference relative to the vertical independent of the orientation of the apparatus within the pipeline.
REFERENCES:
patent: 4275414 (1981-06-01), Norris
patent: 4784463 (1988-11-01), Miyazaki
patent: 4967092 (1990-10-01), Fraignier
patent: 5090608 (1992-02-01), Jones
CRC-Evans Pipeline International, Inc.
Font Frank G.
Ratiff Reginald A.
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