Method and system for checking consistency of two-dimensional drawing and three-dimensional model of ship hull structure

Abstract

The invention discloses a method and a system for checking the consistency of a two-dimensional drawing and a three-dimensional model of a ship body structure. The method comprises the following steps: step 1, extracting part attribute information in the two-dimensional drawing and the three-dimensional model; 2, obtaining structure data of the two-dimensional drawing according to the extracted two-dimensional drawing structure information, and obtaining a three-dimensional model part list according to the extracted three-dimensional model part attribute information; and 3, extracting the structural data of the two-dimensional drawing obtained in the step 2 and the part information of the three-dimensional model to carry out drawing-model consistency inspection, and if the structural data and the part information are not consistent, modifying the three-dimensional model to carry out comparison again until the consistency inspection is completed. According to the method, the attribute information of the three-dimensional model is extracted and output, meanwhile, the two-dimensional drawing is automatically marked to form the structured data, comparison operation is automatically carried out through a program, and a visual comparison result is directly output, so that rapid checking of the consistency of the drawing and the model is achieved, and the design efficiency and the three-dimensional model design quality are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hull design, and particularly relates to a method and system for checking the consistency between two-dimensional drawings and three-dimensional models of a ship hull structure. Background Art

[0002] In the process of ship design, the three-dimensional model takes the two-dimensional design drawing as input. The consistency between the drawing and the model is directly related to the design quality of the product and is the key to ensuring the correct design status of the three-dimensional model. With the development of three-dimensional technology, the creation and application of three-dimensional models have become more and more common. As a complex and delicate task, the three-dimensional modeling of the hull structure not only involves a large number of parts but also has high precision requirements. Therefore, the verification work of the three-dimensional model of the hull structure is very important. The existing problems in the consistency check of the three-dimensional model of the hull structure are as follows:

[0003] First, manual visual inspection is adopted. In the existing three-dimensional model inspection tools, only the attribute information of the three-dimensional model can be extracted and displayed on the three-dimensional model, and the comparison and verification with the two-dimensional drawing information are carried out by manual visual means. This not only consumes a large amount of human resources but also has low efficiency.

[0004] Second, the quality of the model is greatly related to the professional ability level of the verification personnel. In the process of manual visual inspection, factors such as the professional ability, responsibility, and proficiency of the inspection personnel will affect the inspection results.

[0005] Third, the inspection coverage is incomplete. The hull structure model not only has a large number of parts but also has a wide variety of information such as specifications. In manual verification, it is impossible to check each part one by one, and there are omissions.

[0006] In addition, in the process of ship three-dimensional design, the specifications of the hull structure plates and stiffeners are complex and diverse, and their total quantity shows a huge trend, resulting in the problem of low efficiency in traditional manual visual inspection. Summary of the Invention

[0007] To solve the above technical problems, the present invention provides a method and system for checking the consistency between two-dimensional drawings and three-dimensional models of a ship hull structure. By extracting the attribute information of the three-dimensional model and outputting it, and at the same time forming structured data by automatically marking the two-dimensional drawings, the program automatically performs comparison operations and directly outputs intuitive comparison results, so as to realize the rapid check of the consistency between the drawing and the model, improve the design efficiency and the design quality of the three-dimensional model.

[0008] The object of the present invention is achieved through the following technical solutions. A method for checking the consistency between two-dimensional drawings and three-dimensional models of a ship hull structure includes the following steps:

[0009] Step 1: Extract the part attribute information in the two-dimensional drawings and three-dimensional models;

[0010] Step 2: Obtain the structural data of the 2D drawing based on the extracted 2D drawing structural information, and obtain the 3D model part list based on the extracted 3D model part attribute information;

[0011] Step 3: Extract the structural data of the 2D drawing and the 3D model part information obtained in Step 2 for drawing-model consistency verification. If they are inconsistent, modify the 3D model and compare again until the consistency verification is completed.

[0012] Preferably, in Step 1, in the 2D drawing, the components for which information is extracted include plates and stiffeners, and a corresponding specification list is generated.

[0013] Preferably, in Step 1, the acquisition of the plate specification information includes the following steps:

[0014] Mark the hull section boundaries, plate seams, and openings;

[0015] Obtain the boundary of each plate through Boolean operations;

[0016] Extract the panel thickness and material information of the drawing to obtain the plate specification information.

[0017] Preferably, in Step 1, the acquisition of the stiffener specification information includes the following steps:

[0018] Mark the bulb flats and profiles;

[0019] Extract the stiffener boundaries to obtain the stiffener specification information.

[0020] Preferably, in Step 2, export the extracted 3D model information to obtain the attribute information data list of the structural members, that is, the 3D model part list, including the structural member name, plate thickness, material, specification, plate center, profile start point, end point, and midpoint.

[0021] In addition to providing a method for checking the consistency between the 2D drawing and the 3D model of the ship hull structure, the present invention further provides a system for implementing the above method. The system includes:

[0022] A 2D drawing information extraction module, which takes the 2D drawing as input, extracts the part attribute information of the plates and stiffeners involved in the 2D drawing, and transmits it to the data processing module;

[0023] A 3D model information extraction module, which takes the 3D model as input, extracts the part attribute information in the 3D model, and transmits it to the data processing module;

[0024] A data processing module, which receives the 2D drawing part attribute information and the 3D model part attribute information, organizes the two into a 2D drawing part attribute information specification list and a 3D model part attribute information specification list, and transmits them to the comparison module;

[0025] A comparison module compares the specification lists of part attribute information of 2D drawings and 3D models, and outputs the comparison results.

[0026] Preferably, the 2D drawing information extraction module is provided with a hole surface region deletion sub-module for detecting the possibility of misidentifying an opening as a plate, and using the center point of the plate to verify the case where the opening size is correct but the position is incorrect.

[0027] Preferably, the 2D drawing information extraction module is provided with a font recognition module for automatically extracting the plate thickness and material in the drawing annotations and recording them in each surface region.

[0028] Preferably, the 2D drawing information extraction module is provided with a batch editing module for batch editing the information of T-shaped composite materials and stiffeners.

[0029] Preferably, the consistency check system further includes a display terminal. The comparison module outputs the comparison results of the 3D model and the 2D drawing model consistency in a table form, and the prompt information included at least includes material, plate thickness, specification, and positioning mismatch, which is displayed through the display terminal.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] A method and system for checking the consistency of 2D drawings and 3D models of a ship hull structure provided by the present invention extracts the specification lists of structural plates and stiffeners in the drawings by classifying and marking the data of the 2D drawings, and then compares the specification lists exported from the 3D model, so as to quickly find the inconsistent parts between the ship hull structure drawings and models, greatly improve the quality inspection efficiency of the 3D model of the ship hull structure, and avoid the problem of low efficiency of traditional visual inspection. Description of the Drawings

[0032] Figure 1 It is a schematic flow chart of the method for checking the consistency of 2D drawings and 3D models of a ship hull structure in an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the data list exported from the 3D model in an embodiment of the present invention;

[0034] Figure 3 It is a sample drawing of a 2D drawing in an embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of setting a drawing attribute information window in an embodiment of the present invention;

[0036] Figure 5 It is a schematic diagram of a closed plate region in an embodiment of the present invention;

[0037] Figure 6Schematic diagram of the closed opening area in the embodiment of the present invention;

[0038] Figure 7 Schematic diagram of the batch editing window for plate information in the embodiment of the present invention;

[0039] Figure 8 Schematic diagram of the attribute information of the plate area in the embodiment of the present invention;

[0040] Figure 9 Schematic diagram of the horizontal batch processing editing window in the embodiment of the present invention;

[0041] Figure 10 Schematic diagram of the attribute information of the T-shaped composite material in the embodiment of the present invention;

[0042] Figure 11 Schematic diagram of the batch processing window for stiffeners in the embodiment of the present invention;

[0043] Figure 12 Schematic diagram of the attribute information of the stiffeners in the embodiment of the present invention;

[0044] Figure 13 Schematic diagram of the output comparison result in the embodiment of the present invention. Detailed implementation manners

[0045] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0046] The technical solution of the present invention provides a method for checking the consistency between the two-dimensional drawing and the three-dimensional model of the ship hull structure, including the following steps:

[0047] Step 1: Extract the part attribute information from the two-dimensional drawing and the three-dimensional model;

[0048] Step 2: Obtain the structure data of the two-dimensional drawing according to the extracted two-dimensional drawing structure information, and obtain the three-dimensional model part list according to the extracted three-dimensional model part attribute information;

[0049] Step 3: Extract the structure data of the two-dimensional drawing and the three-dimensional model part information obtained in Step 2 for drawing-model consistency inspection. If they are inconsistent, modify the three-dimensional model and compare again until the consistency inspection is completed.

[0050] In an embodiment of the present invention, in Step 1, in the two-dimensional drawing, the components from which information is extracted include plates and stiffeners, and a corresponding specification list is generated. The specific acquisition method is as follows:

[0051] Mark the boundaries of the hull structure, the plate seam lines, and the opening contour lines. Through Boolean operations, the boundary division of the plates is realized. Through the consistency check system, read the geometric information and drawing annotation information of the marked plates to extract the attributes of a single plate. Select the stiffeners by box selection to batch mark the specifications and materials. After the stiffeners are marked and classified, through the consistency check system, read the specifications, materials, and starting point coordinates of the stiffeners to extract the attributes of the stiffeners. Classify the data of the 2D drawing by the above method to extract the list of structural plates and stiffener specifications in the drawing, and then compare it with the specification list exported from the 3D model to quickly find the inconsistencies between the hull structure drawing and the model, and greatly improve the quality inspection efficiency of the hull structure 3D model.

[0052] In the above embodiment, in step 2, export the extracted 3D model information to obtain the list of attribute information data of the structural parts, that is, the 3D model part list, including the name of the structural part, plate thickness, material, specification, center of the plate, starting point, end point, and midpoint of the profile.

[0053] In the technical solution of the present invention, in addition to providing a method for checking the consistency between the 2D drawing and the 3D model of the ship hull structure, a system for implementing the above method is further provided. The system includes:

[0054] A 2D drawing information extraction module, which takes the 2D drawing as input, extracts the attribute information of the plates and stiffeners involved in the 2D drawing, and transmits it to the data processing module;

[0055] A 3D model information extraction module, which takes the 3D model as input, extracts the part attribute information in the 3D model, and transmits it to the data processing module;

[0056] A data processing module, which receives the 2D drawing part attribute information and the 3D model part attribute information, organizes them into a 2D drawing part attribute information specification list and a 3D model part attribute information specification list, and transmits them to the comparison module;

[0057] A comparison module, which compares the 2D drawing part attribute information specification list and the 3D model part attribute information specification list, and outputs the comparison result.

[0058] In an embodiment of the present invention, a method for checking the consistency between the 2D drawing and the 3D model of the hull structure using the above system has the following process Figure 1 As shown, in this embodiment, it is implemented on the 3DEXPERIENCE (hereinafter referred to as 3DE) platform for the 2D drawing and the 3D model, and specifically includes the following steps:

[0059] Step S1: Extract the 3D model attribute information

[0060] Through the independently developed 3D model data export program, according to the preset table information template, an attribute information data list of structural members is exported, including information such as the name of the structural member, plate thickness, material, specification, center of the plate, starting point, ending point, and midpoint of the profile, etc. As shown in the appendix Figure 2 as follows.

[0061] Step S2: Set the attribute information of the 2D drawing

[0062] Open a 2D drawing of a certain deck. As shown in the appendix Figure 3 as follows. Perform a one-time setting of the basic information of the drawing attribute information, such as drawing type, coordinate range, line type layer, etc., to facilitate the program to automatically classify, identify, and integrate the information. The setting command window is as shown in the appendix Figure 4 as follows.

[0063] Step S3: Automatically enclose the plate area and the opening area

[0064] According to the set layer attribute information, automatically enclose and calculate the boundary information of the plate (including the plate seam line, section line, outer plate boundary line), and generate a new enclosed plate area. As shown in the appendix Figure 5 as follows. Similarly, automatically enclose the opening information into a new enclosed opening area. As shown in the appendix Figure 6 as follows.

[0065] Step S4: Batch automatic editing of plate information

[0066] Set the hole surface area deletion function to eliminate the possibility of misidentifying an opening as a plate, and support verifying the correct size and incorrect position of the opening using the center point of the plate. Use the font recognition function to support automatically extracting the plate thickness and material records in the drawing annotations into each surface area. Use the attributes of the plate data area for identification to support displaying the unannotated plate information in the drawing. As shown in the appendix Figure 7 as follows. Select the surface area frame to view and modify all attribute data. As shown in the appendix Figure 8 as follows.

[0067] Step S5: Batch automatic editing of T-shaped combined member information

[0068] Select the beam / longitudinal girder profile that needs to be assigned data one or more times. Automatically distinguish the beam and longitudinal girder profiles according to the angle, automatically hide the processed beam / longitudinal girder lines, and generate a new line with attribute data. As shown in the appendix Figure 9 as follows. Select the profile line to view and modify all attribute data. As shown in the appendix Figure 10 as follows.

[0069] Step S6: Batch automatic editing of stiffener information

[0070] Select the ribbed profile line(s) that need to be assigned data one or more times. The processed ribbed profile line(s) will be automatically hidden, and at the same time, new lines for recording attribute data will be generated, as shown in the appendix Figure 11 Select the ribbed line, and all attribute data can be viewed and modified, as shown in the appendix Figure 12 shown.

[0071] Step S7: Run with one key to output the verification and comparison results

[0072] After all the drawing information structure data is completed, run the verification command, and the comparison results of the three-dimensional model and the two-dimensional drawing model consistency can be output in tabular form, including various prompt information such as material, plate thickness, specification, and positioning mismatch. As shown in the appendix Figure 13 shown.

[0073] The above is the preferred implementation mode of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A method for checking the consistency between the two-dimensional drawing and the three-dimensional model of a ship hull structure, characterized in that: The method includes the following steps: Step 1: Extract the part attribute information from the 2D drawing and 3D model; Step 2: Obtain the structure data of the 2D drawing according to the extracted 2D drawing structure information, and obtain the 3D model part list according to the extracted 3D model part attribute information; Step 3: Extract the structure data of the 2D drawing and the 3D model part information obtained in Step 2 for drawing-model consistency check. If they are inconsistent, modify the 3D model and compare again until the consistency check is completed.

2. The method for checking the consistency between the two-dimensional drawing and the three-dimensional model of a ship hull structure according to claim 1, characterized in that: In Step 1, in the 2D drawing, the components for information extraction include plates and stiffeners, and corresponding specification lists are generated.

3. The two-dimensional drawing and three-dimensional model consistency inspection method for a ship hull structure according to claim 2, characterized in that: In Step 1, the acquisition of the plate specification information includes the following steps: Mark the hull section boundary, plate seam line, and opening; Obtain the boundary of each plate through Boolean operation; Extract the plate thickness and material information on the drawing to obtain the plate specification information.

4. A method for checking the consistency between a two-dimensional drawing and a three-dimensional model of a ship hull structure according to claim 3, characterized in that: In Step 1, the acquisition of the stiffener specification information includes the following steps: Mark the bulb flat bar and profile; Extract the stiffener boundary to obtain the stiffener specification information.

5. A method for checking the consistency between a two-dimensional drawing and a three-dimensional model of a ship hull structure according to claim 4, characterized in that: In Step 2, export the extracted 3D model information to obtain the attribute information data list of the structural members, that is, the 3D model part list, including the structural member name, plate thickness, material, specification, plate center, profile starting point, ending point, and midpoint.

6. A two-dimensional drawing and three-dimensional model consistency checking system for a ship hull structure, characterized in that: The system is used to implement the 2D drawing and 3D model consistency check method described in any one of claims 1-5. The system includes: A 2D drawing information extraction module, which takes the 2D drawing as input, extracts the part attribute information of the plates and stiffeners involved in the 2D drawing, and transmits it to the data processing module; A 3D model information extraction module, which takes the 3D model as input, extracts the part attribute information in the 3D model, and transmits it to the data processing module; A data processing module, which receives the 2D drawing part attribute information and the 3D model part attribute information, organizes them into the 2D drawing part attribute information specification list and the 3D model part attribute information specification list, and transmits them to the comparison module; A comparison module, which compares the 2D drawing part attribute information specification list and the 3D model part attribute information specification list, and outputs the comparison result.

7. The two-dimensional drawing and three-dimensional model consistency checking system for a ship hull structure according to claim 6, wherein: The 2D drawing information extraction module is provided with a hole area deletion sub-module, which is used to detect the possibility of misidentifying an opening as a plate, and use the plate center point to check the situation where the opening size is correct but the position is wrong.

8. The two-dimensional drawing and three-dimensional model consistency checking system for a ship hull structure according to claim 7, characterized in that: The 2D drawing information extraction module is provided with a font recognition module, which is used to automatically extract the plate thickness and material records in the drawing annotation into each area.

9. The two-dimensional drawing and three-dimensional model consistency inspection system for a ship hull structure according to claim 8, characterized in that: The 2D drawing information extraction module is provided with a batch editing module, which is used to batch edit the T-shaped combined material information and the stiffener information.

10. A two-dimensional drawing and three-dimensional model consistency checking system for a ship hull structure according to claim 9, characterized in that: The consistency check system further includes a display terminal. The comparison module outputs the drawing-model consistency comparison result of the 3D model and the 2D drawing in the form of a table. The prompt information included at least includes material, plate thickness, specification, and positioning mismatch, and is displayed through the display terminal.

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