Apparatus for optically checking the inner profile of a tube or

Details Apparatus for optically checking the inner profile of a tube or Apparatus for optically checking the inner profile of a tube or

1989-05-17

1990-10-30

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356241, G01N 2186

Patent

active

049670921

ABSTRACT:
An apparatus is provided for optically checking the inner profile of a tube or a bore, especially the tubes of steam generators in nuclear power stations, the apparatus includes a probe which is positioned within and is movable longitudinally within the tube or bore and is connected to an external power supply and analysis system. The probe includes a source of light, a mechanism for causing the light to illuminate the wall of the tube or bore along a line corresponding to the intersection of the wall with a cross-sectional plane, and a mechanism for forming an image of this line on a photo-sensitive sensor, so that variations in the inner profile of the tube or bore can be determined from deviations of the image from a theoretical image corresponding to the typical profile of the tube or bore.

REFERENCES:
patent: 3602596 (1971-08-01), Astheimer
patent: 3637314 (1972-01-01), Groot
patent: 4199258 (1980-04-01), Dau
patent: 4305661 (1981-12-01), Pryor
patent: 4440496 (1984-04-01), Milana
patent: 4465374 (1984-08-01), Pryor
patent: 4861984 (1989-08-01), West

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