A Positioning Method for Secondary Docking of Ships

Abstract

The invention relates to a ship two-docking positioning method, wherein the two docking of ship are precisely positioned by assigning a positioning reference line (2), setting a first positioning point (3), a second positioning point (5), a third positioning point (7) and a fourth positioning point (8) and matching with a total station (9). According to the present invention, the ship two-dockingpositioning method has advantages of simple and convenient operation, production period shortening and cost saving.

Description

technical field [0001] The invention relates to the field of ship building and maintenance, in particular to a positioning method for a ship's secondary docking. Background technique [0002] In the modern shipbuilding industry, the ship needs to be pulled into the dock for construction, mainly including dry dock and floating dock, which requires the positioning of the ship into the dock. [0003] With the advancement of science and technology, the application of total stations in the field of shipbuilding has changed the positioning method for the second docking of ships, greatly reducing the positioning workload and making positioning more accurate. Compared with the original method, the new method also has the following disadvantages: [0004] 1. In order to ensure the accuracy of positioning in the longitudinal direction of the ship, it is necessary to set longitudinal positioning points on the outer plate of the ship, and use a laser to ensure that the laser and the po...

AI Technical Summary

Problems solved by technology

[0004] 1. In order to ensure the positioning accuracy in the longitudinal direction of the ship, it is necessary to set longitudinal positioning points on the outer plate of the ship, and use a laser to ensure that the laser and the positioning points are on the same rib plane, but the laser needs to be manually observed to see if the light spot is on the same rib plane. On the positioning point, in this process, due to reasons such as observation angle, distance and individual differences, the positioning error is very large, which often leads to positioning failure

[0005] 2. In order to ensure the correct position of the half-width of the bow and stern of the ship, two wooden rulers need to be set on the parallel midbody. During the positioning process, measure the distance from the outer plate to the dock wall to ensure that the measured distance is consistent with the theoretical distance. During the measurement process, it is necessary to ensure that the wooden ruler is perpendicular to the outer plate, which is difficult to achieve in actual operation. At the same time, because the ship’s molded width does not include the outer plate thickness, and the actual measured distance does not include the outer plate thickness, the outer plate thickness in the bow and stern measurement area It may also be inconsistent, which is easy to ignore when positioning, which will cause positioning failure

[0006] Due to the above reasons, the existing positioning process often fails to locate, and needs to re-release water and re-position, which is time-consuming and labor-intensive, increasing the dock cycle and cost

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