METHOD FOR MEASURING FORMS OF SUBMARINE HULLS Russian patent published in 2017 - IPC G01B11/24 

FIELD: measuring equipment.

SUBSTANCE: marked control points are used by punching on the inner hull surface in the planes of the selected controlled frame sections, by installing reflectors thereon, a laser surveying instrument is placed inside the hull, configuring it in the coordinate hull system, then the coordinates of the control points are measured in all the controlled sections and transferred to the computer, which determines by the measurement results the hull shape in the controlled sections. The selected measured control points are transferred to the outer hull surface, for which a gamma-flaw detector is set opposite the selected point, and, securing the x-ray film with a size not less than 70×70 mm on the outer side of the opposite hull section of the body, it is reflected through the hull, and the appeared trace of the interior point is marked outside the hull by punching, then a laser surveying device, mounted outside, is set in the coordinate hull system by the transferred control points, and it determines the coordinates of the points on the outer surface, opposite the points hidden by saturation, and then their internal coordinates are recalculated according to the specific formulas, and then the deviation from the circular form of the controlled submarine hull section is determined according to the results of the measurement data accumulated by the computer.

EFFECT: enabling reliable determination of the hull deviation from circular form in the all controlled sections.

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