Method for positioning reverse reinforcing structure of ship by adopting ultrasonic thickness measurement

Abstract

The invention discloses a method for positioning a reverse reinforcing structure of a ship by adopting ultrasonic thickness measurement, which relates to the field of ship construction and comprises the following steps of: dividing strip-shaped estimated reinforcing intervals on a smooth surface of a ship body plate; measuring the thickness of the ship body plate by using an ultrasonic thickness gauge perpendicular to the strip-shaped pre-estimation reinforcing interval, recording a first point position and a second sudden change corresponding to the sudden change of the thickness measurement reading of the ultrasonic thickness gauge on the smooth surface of the ship body plate, and then changing the position and repeatedly measuring in the same direction to obtain a third point position and a fourth point position; a first straight line is drawn through the first point position and the third point position, a second straight line is drawn through the second point position and the fourth point position, and the area between the first straight line and the second straight line is the accurate alignment position of the hull plate back reinforcement on the hull plate smooth surface. Compared with the prior art, the method provided by the invention is more accurate and rapid in positioning, simpler in operation and lower in cost of related used equipment.

Description

technical field [0001] The invention relates to the field of shipbuilding, and more specifically relates to a method for locating the reverse reinforcement structure of a ship by ultrasonic thickness measurement. Background technique [0002] In the design and construction of ships, in order to meet the strength requirements of the hull, some important outfitting parts (large equipment bases, etc.) must be installed on the hull structure surface with counter-reinforcement. The reverse reinforcement of important outfitting parts is assembled in the segmental construction stage of the hull, and the outfitting parts can only be installed after the segmental assembly. There are strict alignment requirements for the reverse reinforcement structure and the outfitting part structure. The subsections need to be polished and painted before the general assembly, the welding deformation information of the reverse reinforcement structure is covered, and it is difficult to find the speci...

AI Technical Summary

Problems solved by technology

[0009] 1. X-ray equipment is complicated and expensive;

[0010] 2. Many people are required to cooperate with the operation, which is inconvenient;

[0011] 3. X-rays have radiation biological effects on the human body and are harmful to human health; during X-ray filming operations, unrelated personnel are prohibited from approaching within a certain range around it, resulting in the inability to carry out other operations on nearby ships and affecting the overall production progress;

[0012] 4. This method consumes too long time from placing the reference object to finally determining the location of the reinforcement structure with photos;

[0013] 5. The X-ray penetration ability is limited, generally only 30mm, which cannot be used for some thick plates of the hull

[0014] 6. In the method, when placing the reference object on the opposite side of the cargo tank, due to the large and complex structure of the hull, the reverse side of the hull plate may be a deep tank of tens of meters, and it is necessary to use measures such as erecting scaffolding to make the construction personnel reach the position where the reference object is placed, which is time-consuming and laborious. dangerous, even impossible

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