Method for inspecting an internal floating roof in a...

Details Method for inspecting an internal floating roof in a... Method for inspecting an internal floating roof in a...

2005-04-19

2005-04-19

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

Inspection of flaws or impurities

C073S864670

Reexamination Certificate

active

06882412

ABSTRACT:
Methods for remotely inspecting an internal floating roof and the seals associated with such internal floating roof project an illumination pattern from a series of substantially parallel laser beams onto the floating roof and/or the seal. Another laser beam projects at a predetermined angle offset from the series of laser beams. The illumination pattern and offset spot from the other laser are viewed through a camera. The length of a defect in the internal floating roof or seal or a gap between the seal and the tank wall is calculated as the length of a side of a right triangle based upon the predetermined angle and the predetermined distance between the lasers and the floating roof or seal.

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SEAMAY DPC-7000 Underwater Digital Photo Camera User Manual (Apr. 2002) Deep Sea Systems International Inc., Cataumet, MA.

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