KR20160113940A - Ship block lifting system using 3-dimensional model - Google Patents

Abstract

The present invention relates to a ship block lifting system using a three-dimensional model and, more specifically, relates to a ship block lifting system using a three-dimensional model which arranges a lug in a block through a computer screen, and automatically generates a three-dimensional model such as the block, the lug, a crane, or the like; thereby accurately determining and predicting in advance a situation of lifting work and the dangerousness based on the three-dimensional model realized on the computer screen before onsite lifting work.

Description

[0001] SHIP BLOCK LIFTING SYSTEM USING 3-DIMENSIONAL MODEL [0002]

The present invention relates to a ship block lifting system using a three-dimensional model. More particularly, the present invention relates to a ship block lifting system using a three-dimensional model, more precisely determining and predicting the situation or risk of a lifting operation based on a three- To a ship block lifting system using a three-dimensional model.

In order to dry the hull, a plurality of steel plates or sections are machined to manufacture individual components, and a part of the components is compacted on the assembly plate through small assembly and midship lining. Subsequently, these components are arranged and combined in a line-assembled platen to produce a block. The finished block is painted and completed by assembling the block and the block around the dock, which is the final process.

On the other hand, the purpose of the block drying method is to divide the hull on the assembly platform of the ground in order to reduce the construction amount in the dock as much as possible, to shorten the operation period in the dock, It is easy to arrange the appropriate worker, the work environment is improved, the mechanization and automation are facilitated, the efficiency is improved, the risk of high work (low work) can be reduced, It is possible to reduce welding deformation and residual stress, and it is possible to reduce the painting work in the dock by performing the block coating.

Blocks are classified into several types according to their size and structure, but they are roughly divided into flat blocks and tune blocks. Generally, it is generally acceptable to think that a block is composed of a plate, a girder, a stiffener or the like in a planar manner. In the assembly (large assembly) process, a plate is arranged on a surface plate, and a girder and a stiffener are arranged on the plate, and the welding is performed to complete one block. Is referred to as a large assembly process. In recent years, the installation of equipment and the construction of various tests have been carried out in advance on the assembly platform.

The weight of the block has been enlarged with the enhancement of the facilities and the improvement of the production technology. In the large tank line, 200-300 tons is normal. Depending on the size of the facility, some of them exceed 400 to 500 tons. Furthermore, the way to dry very large blocks (800 tons) by the preceding process is common.

The ships to be constructed are divided into appropriate types of blocks in consideration of the facilities and equipment capabilities and ease of operation, and these blocks are completed through the processing and assembling process of the members and moved to the dock. The loading process refers to the process of creating the shape of a ship by stacking the completed blocks through the assembly process in a certain order one by one in the dock. As the crane capacity increases, the divided blocks become larger, and the installation of the so-called preceding equipment, which performs the fitting work along with the installation, or the construction of a part of the block as a part of the ship building work, Is gradually increasing.

On the other hand, in order to move the individually manufactured blocks to the mounting process, it is necessary to lifting and transporting the produced blocks or turning them over. In particular, the turn-over process of the block is accomplished by attaching two or more lugs to the shell outer surface or frame of the block, connecting the wires to the respective lugs, (Fig. 1). In this case, the blocks are reversed by pulling them upward or downward by using more than one crane (Fig. 1).

In the shipbuilding industry in recent years, since the block weight is increasing due to the enlargement of the block, it is necessary to pay particular attention to the selection of the position of the lug necessary for lifting the block. In this regard, conventionally, based on the experience of the designer, the position of the lug was determined on the drawing and the position of the crane was determined in the field. Due to the excessive calculation time and the inaccuracy of the resultant value, It was very difficult to judge or predict.

Korean Utility Model No. 20-2013-0000141 (Publication date: 2013. 01. 08.)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method and a system for automatically placing a lug on a block, a lug, and a crane, Dimensional model that can accurately predict and predict the situation or risk of a lifting operation based on a three-dimensional model implemented in the ship block lifting system.

According to an aspect of the present invention, there is provided a lug arrangement apparatus comprising: a lug arrangement unit for arranging three-dimensional lugs in blocks; And a three-dimensional model generation unit for automatically generating a three-dimensional model of a block, a crane, a trolley, and a wire rope based on the position of the three-dimensional lugs disposed by the lug arrangement unit. Wherein the lug arranging unit includes a two-dimensional lug symbol library for two-dimensional drawing, a three-dimensional lug shape library for a three-dimensional model, a lug type defining a type and an attribute of the lug itself for managing the generated lug, And a coordinate conversion unit for converting the two-dimensional drawing coordinates into the three-dimensional model coordinates. In the coordinate conversion unit, when converting the two-dimensional drawing coordinates into the three-dimensional model coordinates, the position of the lug in the two- Dimensional matrix, constructing a transformation matrix of the panel in which the lugs are generated, Dimensional model, and the three-dimensional model generating unit converts the three-dimensional lug into three-dimensional coordinates of the hull using the transformation matrix of the panel, and the three-dimensional model generating unit automatically generates a three-dimensional model of a block, a crane, a trolley, The position of the crane is determined relative to the center of gravity of the target block. When working with one crane, the crane is placed just above the center of gravity of the target block. When working with two cranes, two cranes are placed close to the vertical lifting possible, depending on the minimum distance considering the interference between the cranes and the weight of the target block. The trolley determines its height according to the length of the base wire, The direction of the trolley is determined by determining the direction of the trolley according to the state of the trolley, Dimensional model that determines the direction perpendicular to the lifting direction and projects the lugs on the determined surface and determines the direction of the trolley corresponding to the minimum distance using the least squares method on the projected surface, Thereby providing a lifting system.

According to the present invention, prior to the field lifting operation, a lug arrangement of a block and a location of a crane or the like are selected based on a three-dimensional model implemented on a computer screen, so that a field situation or a risk can be accurately determined and predicted in advance. Typically, output to a drawing to current users is still an essential element in the work. On the other hand, 3D modeling is also an essential factor for more efficient management, accurate calculation, and safety review for multiple cases. If the present users are required to perform the above-described operations without using the present invention, it is generally considered that a cost of 250% or more will occur. It is an object and an effect of the present invention to make it possible to efficiently perform this without additional cost.

1 shows an example of a turn-over operation of a hull block;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a three-
3 is a detailed representation of the configuration of a lug arrangement part in a ship block lifting system using a three-dimensional model according to the present invention.
4 is a view illustrating a structure implemented on a computer screen so that a lug arrangement unit functions in a ship block lifting system using a three-dimensional model according to the present invention.
5 is a view illustrating a method of determining a direction of a trolley by a three-dimensional model generator in a ship block lifting system using a three-dimensional model according to the present invention.
FIG. 6 is a view showing a generation of a three-dimensional model for block lifting in a ship block lifting system using a three-dimensional model according to the present invention. FIG.
FIG. 7 illustrates various embodiments of a two-dimensional lug symbol in a ship block lifting system using a three-dimensional model according to the present invention;
8 illustrates various embodiments of a three-dimensional lug shape in a ship block lifting system using a three-dimensional model according to the present invention.
9 illustrates various embodiments of a lug type class in a ship block lifting system using a three-dimensional model according to the present invention.
10 is a view schematically showing a concept of a panel in a ship block lifting system using a three-dimensional model according to the present invention.
11 is a view showing an example of generation of a three-dimensional model when a lifting operation is performed with two cranes in a ship block lifting system using a three-dimensional model according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the constituent elements of the drawings, it is to be noted that the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Despite the recent advancement of 3D CAD technology, shipbuilding production technology still tends to adhere to the numbering method that depends on drawing-based work and experience. In connection with this, The position of the lug is determined on the drawing and the position of the crane is determined in the field, and the excessive calculation time and the inaccuracy of the resultant value become a problem.

Accordingly, the present invention induces an existing drawing-oriented job to be converted into a work based on a 3D model implemented on a computer screen, performs various calculations automatically, and displays the result together with a three-dimensional model, And to provide a system for selecting appropriate positions of crane or the like for all cases and checking whether the lugs are interfered or not.

FIG. 2 is a view showing a constitutional relationship of a ship block lifting system using a three-dimensional model according to the present invention. FIG. 3 is a schematic view showing a structure of a lug arrangement part in a ship block lifting system using a three- FIG. 4 is a view showing a structure implemented on a computer screen so that the lug arrangement unit functions in a ship block lifting system using a three-dimensional model according to the present invention. FIG. FIG. 6 is a diagram illustrating a method for determining the direction of a trolley in a ship block lifting system using a 3D model. FIG. FIG. 7 is a view showing a state in which a 3D model is created, FIG. 8 is a view showing various embodiments of a three-dimensional lug shape in a ship block lifting system using a three-dimensional model according to the present invention, and FIG. 9 FIG. 10 is a view illustrating various embodiments of a lug type class in a ship block lifting system using a three-dimensional model according to the present invention, and FIG. 10 is a view illustrating a concept of a panel in a ship block lifting system using a three- FIG. 11 is a view showing an example of generating a three-dimensional model when a lifting operation is performed with two cranes in a ship block lifting system using a three-dimensional model according to the present invention.

The ship block lifting system using the three-dimensional model according to the present invention comprises a lug arrangement unit 10 and a three-dimensional model generation unit 20. Hereinafter, the lug arrangement unit 10 and the three-dimensional model generation unit 20 ) Will be described in detail.

The lug arranging unit (10) places the three-dimensional lug on the block (1). Of course, the block (1) refers to a block implemented in a three-dimensional shape on a computer screen as shown in FIG. In the present invention, the term " three-dimensional " means more clearly embodied in a three-dimensional shape, and the term " two-dimensional " Therefore, in this step, the term " three-dimensional lug " means more specifically a lug embodied in a three-dimensional shape (hereinafter the same).

At this time, the key function of the lug arranging unit 10 is to efficiently arrange the lugs. If the user places the lugs in the 2D drawings implemented on the computer screen, (1) and functions similarly to the lug movement, copying, and rotation afterwards. In the present invention, the arrangement of the lugs includes a series of processes such as creation, movement, copying, and rotation of the lugs.

2 and 3, the lug arranging unit 10 includes a two-dimensional lug symbol library 11 for a two-dimensional drawing, a three-dimensional lug shape library 12 for a three-dimensional model, A lug type and attribute defining unit 13 for defining types and attributes of the lug itself for managing the generated lugs, and a coordinate converting unit 14 for converting the two-dimensional drawing coordinates into three-dimensional model coordinates Element. 3 is a diagram showing the configuration of the lug arrangement unit 10 in more detail.

According to the embodiment of the present invention, the two-dimensional lug symbol library 11 constructs 20 types of two-dimensional lug symbols, and the three-dimensional lug type library 12 forms 100 types of three- The lug type and attribute defining unit 13 defines ten types of lug type classes, and the coordinate transforming unit 14 implements logic for coordinate transformation.

Hereinafter, the above content will be described in more detail. In accordance with the present invention, the system user, i.e., the designer, predicts the load to be applied to the lug to determine the lug type and proper placement, thereby specifying the location where the lug will actually be attached.

In this case, the designer usually performs a lug arrangement operation on a two-dimensional drawing (for this purpose, the present invention implements a two-dimensional drawing on a computer screen so that a designer can efficiently perform a lug arrangement operation) , And the lug displayed on the two-dimensional drawing at this time is represented by a drawing symbol, that is, a two-dimensional lug symbol, which is not an actual lug shape. This is because it is difficult to express information about the lug-attached surface such as the front, back, and both sides of the actual lug, and the size of the actual lug is very small on the drawing, which is difficult for the operator in the field to recognize.

Here, the two-dimensional lug symbol refers to a symbol system in which information about a lug type and a lug-attached surface is expressed so that it can be displayed on a two-dimensional drawing, as shown in FIG. 7. In the present invention, Is automatically determined by the selected lug type and the lug attachment surface (front, back, both sides). To this end, the two-dimensional lug symbol library 11 constructs (stores) about 20 types of two-dimensional lug symbols .

Meanwhile, the three-dimensional lug information (position and direction) is required to perform the accurate lifting calculation while disposing the lug as described above. To this end, in the present invention, a three-dimensional lug is simultaneously generated as a background work in a designer's two-dimensional drawing work. The lug arranging unit 10 arranges the lugs in a two-dimensional drawing implemented on a computer screen (a two-dimensional lug symbol is displayed) (See FIG. 8) and is placed in the block 1, and the same operation also applies to the following lug movement, copying, and rotation.

To this end, the three-dimensional lug library 12 constructs (stores) 100 kinds of three-dimensional lug shapes (see FIG. 8), and the lug type and attribute defining unit 13 defines ten types of lug type classes do. Here, the lug type class is for storing information such as the counting of the amount of lugs and the management of the stage. In the embodiment of the present invention, UDET (User Defined Element Type) and UDA (User Defined Attribute; Definition attribute) (see FIG. 3). For reference, FIG. 9 shows various embodiments of the lug type class according to the present invention.

On the other hand, in order to simultaneously create a three-dimensional lug as a background work in a two-dimensional drawing work of a designer as described above, it is necessary to perform a matrix calculation for converting a lug position on a two-dimensional drawing to a position on a three-dimensional model The coordinate conversion unit 14 directly performs this operation.

The coordinate converting unit 14 is necessary for generating, moving, copying, and rotating three-dimensional lugs. The logic for the coordinate converting unit 14 to convert the two-dimensional drawing coordinates of the lug into the three- A2 → A3 → A4.

- A1: When the user selects the position of the lug in the two-dimensional drawing, a transformation matrix representing the two-dimensional drawing is constructed.

- A2: Configure the transformation matrix of the panel from which the lug is generated. Here, the panel means a plane (three 3D vectors indicating a 3D point and a direction indicating a position) on which a member such as a plate or a stiffener is to be placed (see FIG. 10) The member is positioned relative to the panel and the lug is also positioned relative to this panel. And such a bundle of panels and members forms a single block.

- A3: Converts to two-dimensional panel coordinates after projection process.

- A4: Converts to the hull's three-dimensional coordinates using the panel's transformation matrix and creates a three-dimensional lug.

The three-dimensional model generation unit 20 generates a three-dimensional model of the block 1, the crane 2, the trolley 3, the wire rope 4, and the like based on the positions of the three- Automatically generated.

The elements used in the lifting operation include a block 1, a crane 2, a trolley 3, a wire rope 4 and the like. In generating the three-dimensional model by the three-dimensional model generation unit 20, . The block 1 has a three-dimensional shape, a weight, and a center of gravity as a lifting object. The crane 2 can be a goliath crane, a jib crane, an overhead crane, and the trolley 3 can be a loader or a hook type And serves to distribute the wire rope 4. The lugs are arranged in the block (1) to allow the wire rope (4) to hang.

On the other hand, in order to automatically generate the above-described elements based on the positions of the arranged three-dimensional lugs, that is, the block 1, the crane 2, the trolley 3, the wire rope 4, The three-dimensional position and direction of the elements must be determined. In this regard, the three-dimensional model generation unit 20 operates to perform the following steps.

end. Positioning of the crane (2): The position of the crane (2) is determined relative to the center of gravity of the target block (1). That is, when working with one cranes 2, the cranes 2 are placed just above the center of gravity of the target block 1 (see Fig. 6). When working with two cranes 2, The two cranes 2 are arranged close to the vertical lifting possible according to the minimum distance considering the interference between the target block 1 and the weight of the target block 1 (see FIG. 11).

I. Positioning of trolley 3: The trolley 3 determines its height according to the length of the basic wire and determines its direction according to the state of the lug arrangement. The method of determining the direction of the trolley 3 is composed of the following four steps B1, B2, B3, and B4 (see FIG. 5).

- B1: Determine the number of lugs connected to the trolley (3).

- B2: Determine the plane perpendicular to the lifting direction.

- B3: Project lugs onto the determined surface.

- B4: The direction of the trolley 3 corresponding to the minimum distance is determined using the least square method (LSM) on the projected plane. Here, the minimum distance means the minimum distance between the lug and the trolley 3.

When the direction of the trolley 3 is determined as described above, the connection relation between the lug and the wire rope 4 can be confirmed. Then, based on the above-mentioned contents, a three-dimensional model is collectively created by combining the wire rope 4 connected to the three-dimensional lugs, the trolley 3 and the crane 2, as shown in FIG.

Therefore, according to the present invention, prior to the field lifting operation, the lug arrangement of the block (1) and the location of the crane (2) are selected based on the 3D model implemented on the computer screen, Judgment and prediction.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: block, 2: crane, 3: trolley
4: wire pof, 10: lug arrangement part
11: 2-dimensional lug symbol library, 12: 3-dimensional lug feature library
13: lug type and attribute defining unit, 14: coordinate conversion unit
20: Three-dimensional model generation unit

Claims (1)

A lug arrangement part for arranging a three-dimensional lug in a block; And a three-dimensional model generating unit for automatically generating a three-dimensional model of a block, a crane, a trolley, and a wire rope based on the positions of the three-dimensional lugs disposed by the lug arranging unit. As a result,
The lug arranging unit includes a two-dimensional lug symbol library for two-dimensional drawing, a three-dimensional lug shape library for a three-dimensional model, a lug type and property definition defining types and attributes of the lug itself for managing the generated lugs, And a coordinate conversion unit for converting the two-dimensional drawing coordinates into three-dimensional model coordinates,
When the coordinate transformation unit transforms the two-dimensional drawing coordinates into the three-dimensional model coordinates, if a position of the lug is selected in the two-dimensional drawing, a transformation matrix for expressing the two-dimensional drawing is constructed, and a transformation matrix of the panel Transforms them into two-dimensional panel coordinates through a projection process, transforms them into three-dimensional coordinates of the hull using a panel transformation matrix, creates a three-dimensional lug,
The three-dimensional model generation unit determines the three-dimensional position and direction of the crane and the trolley in automatically generating a three-dimensional model of a block, a crane, a trolley, and a wire rope,
The position of the crane is determined relative to the center of gravity of the target block. When working with one crane, the crane is placed just above the center of gravity of the target block. When working with two cranes, Depending on the distance and the weight of the target block, two cranes are placed close to the possible vertical lifting,
The trolley determines the height according to the length of the basic wire and determines the direction according to the state of the lug arrangement. Determining the direction of the trolley determines the number of lugs connected to the trolley, Determining a direction of the trolley corresponding to the minimum distance by projecting the lugs on the determined plane and using the least square method on the projected plane.

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