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

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 88/00 (2006.01) B65D 88/34 (2006.01) G01N 21/954 (2006.01) G01S 5/16 (2006.01)

Patent

CA 2496151

Methods for remotely inspecting an internal floating roof (18) and the seals (20, 70, 72) associated with such internal floating roof project an illumination pattern (64) from a series of substantially parallel laser beams (52) onto the floating roof and/or the seal. Another laser beam (60) projects at a predetermined angle offset from the series of laser beams (52). The illumination pattern (64) and offset spot (66) from the other laser are viewed through a camera (50). 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.

L'invention concerne des procédés destinés à inspecter à distance un toit flottant intérieur (18) et les joints (20, 70, 72) associés à ce toit flottant intérieur, et consistant à projeter un motif d'éclairage (64) à partir d'une série de faisceaux laser sensiblement parallèles (52) sur le toit flottant et/ou le joint. Un autre faisceau laser (60) est projeté à un angle prédéterminé décalé par rapport à la série de faisceaux laser (52). Le motif d'éclairage (64) et le point décalé (66) en provenance de l'autre laser sont visualisés par l'intermédiaire d'une caméra (50). La longueur d'un défaut présent dans le toit flottant intérieur ou le joint ou d'un espacement entre le joint et la paroi du réservoir est calculée en tant que longueur d'un côté d'un triangle rectangle sur la base de l'angle prédéterminé et de la distance prédéterminée entre les lasers et le toit flottant ou le joint.

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