Method and apparatus for inspecting pipe thickness

Details Method and apparatus for inspecting pipe thickness Method and apparatus for inspecting pipe thickness

1995-10-26

1998-06-02

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

250223R, 250224, 356382, 356435, 356239, G01B 1106

Patent

active

057604134

ABSTRACT:
A plurality of radiation receiving elements disposed outside a pipe at equal distances from the axis thereof so that radiation from a radiation source is received through the pipe wall. As the thickness of the pipe wall varies, the received radiation varies accordingly. If the received radiation fluctuates in excess of the allowable range, the thickness of the pipe wall is judged to be outside the allowable range. When the fluctuation of the received radiation is within the allowable range, the thickness of the pipe wall is within the preset tolerances.

REFERENCES:
patent: 4510389 (1985-04-01), Fumoto
patent: 4988210 (1991-01-01), Koshihara et al.
patent: 5049750 (1991-09-01), Hoshino et al.
patent: 5139406 (1992-08-01), Hoshino et al.
patent: 5185533 (1993-02-01), Banks et al.
patent: 5362962 (1994-11-01), Barborak et al.

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