Ship large-area deck planeness rapid measurement and calculation method

Abstract

A ship large-area deck planeness rapid measurement and calculation method comprises the steps: S1, selecting a to-be-measured ship deck surface area, and determining the boundary of a measurement area; S2, determining a measurement station, and pasting a target sheet as a common point; S3, scanning and measuring a mounting surface of the to-be-measured deck surface to a base under multiple stations, and acquiring point cloud data of a measurement plane and space coordinates of the measurement common point; S4, resolving the coordinates of the common point by using a four-parameter coordinate conversion calculation model, and solving coordinate system conversion parameters; S5, fitting the point cloud data to a plane, and solving a plane fitting parameter by adopting a least square fittingmethod; and S6, rotating the point cloud data to an O-xy plane by utilizing the solved plane fitting parameter, and solving planeness data. An existing measuring and calculating method is improved, and the ship large-area deck flatness measuring and evaluating efficiency is effectively improved.

Description

technical field [0001] The invention relates to the field of industrial measurement, in particular to a fast measurement and calculation method for large-area deck flatness of a ship. Background technique [0002] With the increasing size of ships and the increasing technical complexity, in order to ensure the reliability of equipment installation and use in the construction process, the flatness control of large areas and long distances has become the development direction of construction precision control in recent years. Among them, the flatness evaluation of a large area is a basic technology, and the traditional wire drawing method, level measurement method, total station measurement method, etc. are difficult to meet the measurement requirements in terms of efficiency and accuracy. Due to the influence of blanking, assembly, welding, loading and other processes, the measurement of its construction deformation is very complicated, and it is often accompanied by a multi-...

AI Technical Summary

Problems solved by technology

Among them, the flatness evaluation of a large area is a basic technology, and the traditional wire drawing method, level meter measurement method, total station measurement method, etc. are difficult to meet the measurement requirements in terms of efficiency and accuracy.

Due to the influence of blanking, assembly, welding, loading and other processes, the measurement of its construction deformation is very complicated, and it is often accompanied by a multi-stage construction process, which even affects the service life and service life of the equipment in the service stage of the ship, especially for beamless arches. , Large-area hull main deck without pillars requires efficient and accurate deck surface flatness measurement and calculation to effectively detect and evaluate the hull construction accuracy and ensure accurate and reliable deformation correction

[0003] At present, the deck flatness measurement methods used by domestic shipyards are usually the wire drawing method and the single-point measurement method of the total station. The measurement efficiency and the reliability of the measurement results are not high, and the measurement accuracy is greatly affected by human factors.

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