CN114722963A - Legend identification method and system for generating three-dimensional BIM (building information modeling) model by using two-dimensional drawing of subway station - Google Patents
Legend identification method and system for generating three-dimensional BIM (building information modeling) model by using two-dimensional drawing of subway station Download PDFInfo
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Abstract
The embodiment of the invention provides a legend identification method and a legend identification system for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station, wherein the method comprises the following steps: acquiring a civil engineering drawing, generating a corresponding horizontal section drawing according to the civil engineering drawing, and classifying; extracting a component legend in the graph according to the classification result, the plan graph and the elevation graph, and determining legend information in the component legend; identifying a shaft network legend in a plane graph and a building elevation in a vertical graph by combining the component legend and legend information, and obtaining plane data and vertical data by combining a preset geometric figure identification algorithm; and obtaining plane stretching according to the plane data, obtaining elevation stretching according to the elevation data, and fusing to obtain a three-dimensional BIM (building information modeling) model of the entity of the subway station. By adopting the method, the drawing of the drawing is taken as the identification basis, when the civil engineering drawing is converted into the three-dimensional BIM model, the method does not depend on the layer data processing of the original drawing, shortens the time for reconstructing the BIM model, and greatly improves the identification progress and the automation degree of the CAD drawing.
Description
Technical Field
The invention relates to the technical field of building information models, in particular to a legend identification method and system for generating a three-dimensional BIM model from two-dimensional drawings of a subway station.
Background
In recent years, rail transit is being recognized by more and more cities as an effective way to solve the problem of urban traffic, and the rail transit industry has been showing a great momentum of vigorous development. The subway owner's understanding of the subway is more and more deep along with the development of the subway industry, and the design unit is required to use the BIM technology to carry out design in an all-round way and meet the international rail. In terms of design results, many owners of cities not only require to design and submit two-dimensional drawings, but also need to submit BIM models corresponding to the two-dimensional drawings.
From the experience of Building Information Modeling (BIM) of urban rail transit, designers commonly draw two-dimensional drawings in two-dimensional design software and manually build the two-dimensional drawings into three-dimensional models in the BIM software. The modeling of the method is a large amount of tedious and repetitive work, in addition, because the operation method of BIM software is different from the traditional two-dimensional design software, the establishment of a three-dimensional BIM model usually consumes several times of time compared with the drawing of a two-dimensional drawing, a subway station is a system engineering and relates to dozens of specialties, and the waste of time cost caused by the mode used by each speciality is a huge obstacle for popularizing the BIM technology in the municipal rail transit industry.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a legend identification method and a legend identification system for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station.
The embodiment of the invention provides a legend identification method for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station, which comprises the following steps:
acquiring a civil engineering drawing, generating corresponding horizontal sectional drawing paper according to the civil engineering drawing, and classifying the horizontal sectional drawing paper;
according to the classification result, obtaining a plan view and an elevation view of the subway station, extracting component legends of the plan view and the elevation view, and determining corresponding legend information according to the component legends, wherein the legend information comprises: line type, line width, color;
identifying an axis network legend in the plane graph by combining the component legend and legend information, identifying a building elevation in the elevation graph, and obtaining plane data corresponding to the plane graph and elevation data corresponding to the elevation graph by combining a preset geometric figure identification algorithm;
generating plane stretching of an entity of the subway station according to the plane data, generating facade stretching of the entity of the subway station according to the facade data, and fusing the plane stretching and the facade stretching to obtain a three-dimensional BIM (building information model) of the entity of the subway station, wherein the entity of the subway station comprises: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity.
In one embodiment, the method further comprises:
generating plane stretching of a first entity according to the plane data, generating facade stretching of the first entity according to the facade data, and fusing the plane stretching and the facade stretching to obtain a three-dimensional entity of the first entity, wherein the first entity comprises: a beam entity, a floor entity, a wall entity and a column entity;
combining the three-dimensional entity of the wall entity, generating plane stretching of a door and window entity according to the plane data, generating vertical surface stretching of the door and window entity according to the vertical surface data, and fusing the plane stretching and the vertical surface stretching to obtain a three-dimensional hollow entity of the door and window entity;
combining the three-dimensional entity of the floor entity, generating plane stretching of the hole entity according to the plane data, generating vertical surface stretching of the hole entity according to the vertical surface data, and fusing the plane stretching and the vertical surface stretching to obtain a three-dimensional hollow entity of the hole entity;
and obtaining a corresponding three-dimensional BIM model according to the three-dimensional entity of the first entity, the three-dimensional hollow entity of the door and window entity and the three-dimensional hollow entity of the hole entity.
In one embodiment, the classification result includes:
building elevation, building plan, structure elevation and structure plan;
the component illustration of the drawing plan view and the elevation view comprises:
extracting elevation legends and floor legends in building elevation drawings, column legends, wall legends and door and window legends in building plan drawings, floor legends and beam legends in structural elevation drawings, and column legends, beam legends and hole legends in structural plan drawings.
In one embodiment, the method further comprises:
and carrying out data cleaning on redundant contents of the vertical section drawing, wherein the redundant contents comprise: scattered line segments, multi-segment lines, annotations, and labels.
In one embodiment, the component legend includes:
reinforced concrete, mortar brick walls, common partition walls, fireproof partition walls and back walls.
The embodiment of the invention provides a legend recognition system for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station, which comprises the following steps:
the system comprises an acquisition module, a classification module and a classification module, wherein the acquisition module is used for acquiring a civil engineering drawing, generating corresponding horizontal split drawing paper according to the civil engineering drawing, and classifying the horizontal split drawing paper;
an extraction module, configured to obtain a plan view and an elevation view of a subway station according to a classification result, extract component legends of the plan view and the elevation view, and determine corresponding legend information according to the component legends, where the legend information includes: line type, line width, color;
the identification module is used for identifying the shaft network legend in the plane graph by combining the component legend and the legend information, identifying the building elevation in the elevation graph and obtaining plane data corresponding to the plane graph and elevation data corresponding to the elevation graph by combining a preset geometric figure identification algorithm;
the model building module is used for generating plane stretching of an entity of the subway station according to the plane data, generating vertical surface stretching of the entity of the subway station according to the vertical surface data, and fusing the plane stretching and the vertical surface stretching to obtain a three-dimensional BIM model of the entity of the subway station, wherein the entity of the subway station comprises: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity.
In one embodiment, the system further comprises:
a first entity module, configured to generate a plane stretch of a first entity according to the plane data, generate an elevation stretch of the first entity according to the elevation data, and obtain a three-dimensional entity of the first entity by fusing the plane stretch and the elevation stretch, where the first entity includes: a beam entity, a floor entity, a wall entity and a column entity;
the door and window entity module is used for combining the three-dimensional entity of the wall entity, generating plane stretching of the door and window entity according to the plane data, generating vertical face stretching of the door and window entity according to the vertical face data, and fusing the plane stretching and the vertical face stretching to obtain a three-dimensional hollow entity of the door and window entity;
the hole entity module is used for combining the three-dimensional entity of the floor slab entity, generating plane stretching of the hole entity according to the plane data, generating vertical face stretching of the hole entity according to the vertical face data, and fusing the plane stretching and the vertical face stretching to obtain a three-dimensional hollow entity of the hole entity;
and the second model establishing module is used for obtaining a corresponding three-dimensional BIM model according to the three-dimensional entity of the first entity, the three-dimensional hollow entity of the door and window entity and the three-dimensional hollow entity of the hole entity.
In one embodiment, the system further comprises:
and the second extraction module is used for extracting elevation legends and floor legends in the building elevation drawings, column legends, wall legends and door and window legends in the building plan drawings, floor legends and beam legends in the structural elevation drawings, and column legends, beam legends and hole legends in the structural plan drawings.
The embodiment of the invention provides electronic equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program and realizes the step of the legend identification method for generating the three-dimensional BIM model from the two-dimensional drawing of the subway station.
The embodiment of the invention provides a non-transitory computer readable storage medium, wherein a computer program is stored on the non-transitory computer readable storage medium, and when the computer program is executed by a processor, the steps of the legend identification method for generating the three-dimensional BIM model from the two-dimensional drawing of the subway station are realized.
The legend identification method and system for generating the three-dimensional BIM model from the two-dimensional drawing of the subway station, provided by the embodiment of the invention, are used for obtaining a civil engineering drawing, generating corresponding horizontal and vertical sectional drawing paper according to the civil engineering drawing, and classifying the horizontal and vertical sectional drawing paper; according to the classification result, obtaining a plan view and an elevation view of the subway station, extracting component legends of the plan view and the elevation view, and determining corresponding legend information according to the component legends, wherein the legend information comprises: line type, line width, color; identifying a shaft network legend in a plane graph and a building elevation in an elevation graph by combining the component legend and legend information, and obtaining plane data corresponding to the plane graph and elevation data corresponding to the elevation graph by combining a preset geometric figure identification algorithm; generating plane stretching of an entity of the subway station according to the plane data, generating facade stretching of the entity of the subway station according to the facade data, fusing the plane stretching and the facade stretching to obtain a three-dimensional BIM (building information model) of the entity of the subway station, wherein the entity of the subway station comprises: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity. Therefore, the drawing of the drawing is used as a recognition basis, when the civil engineering drawing is converted into the three-dimensional BIM model, the drawing does not depend on the layer data processing of the original drawing any more, the linkage application of the drawing is realized, the time for reconstructing the BIM model is shortened, and the recognition progress and the automation degree of the CAD drawing are greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flowchart of a legend identification method for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station in an embodiment of the present invention;
FIG. 2 is a structural diagram of a legend recognition system for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an electronic device in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of a legend recognition method for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station according to an embodiment of the present invention, and as shown in fig. 1, an embodiment of the present invention provides a legend recognition method for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station, including:
step S101, a civil engineering drawing is obtained, corresponding horizontal split drawing paper is generated according to the civil engineering drawing, and the horizontal split drawing paper is classified.
Specifically, the subway civil engineering drawings are numerous in number, drawings such as a large sample drawing and a general drawing are included in addition to drawings such as a horizontal section drawing, relevant horizontal section drawings are generated through overall civil engineering according to needs, an accurate data source can be provided for subsequent steps, the accuracy of automatic modeling is improved, all the completed horizontal section drawings are classified according to actual conditions of a station, such as a station hall layer and a station layer, and drawings of a plane drawing and a vertical drawing can be classified.
In addition, after the horizontal and vertical cutting drawing paper is classified, redundant contents except for a main body layout drawing in the drawing, including scattered line segments, multiple line segments, comments, labels and the like, are cleaned, so that the data identification amount is reduced, and the automatic modeling efficiency is improved.
Step S102, according to the classification result, obtaining a plan view and an elevation view of the subway station, extracting component legends of the plan view and the elevation view, and determining corresponding legend information according to the component legends, wherein the legend information comprises: line type, line width, color.
Specifically, the legend of each drawing is extracted, the components in each drawing are identified by taking the legend as a core, conversion based on a geometric figure identification algorithm can be realized after the legend is extracted, complex weighting analysis and judgment in a layer classification method are not needed, and the identification accuracy and efficiency can be greatly improved. The method mainly comprises the steps of extracting component legends from plane drawings and elevation drawings in drawings of building and structure specialties, and extracting effective information of the legends, including line types, line widths, colors and the like. Extracting elevation legends and building floor legends from the building elevation drawings; extracting a building column legend, an inner wall legend, a door and window legend and a railing legend from the building plane drawing; extracting a structural floor plate legend and a structural beam legend from the structural elevation graph; extracting a structural column legend, a beam legend and a hole legend from the structural plane diagram, and collecting effective information (legend information): line type, line width, color.
In addition, the component legends can comprise reinforced concrete, mortar and brick walls, general partition walls, fireproof partition walls and back walls, and legend information is the line type, line width and color of various wall bodies in the drawing.
And S103, combining the component legend and legend information, identifying an axis network legend in the plane graph, identifying a building elevation in the elevation graph, and combining a preset geometric figure identification algorithm to obtain plane data corresponding to the plane graph and elevation data corresponding to the elevation graph.
Specifically, the steps can be divided into 1, generating the positioning data of the plane drawing: and then sequentially identifying components such as an axis network legend, a wall, a beam, a column, a plate, a door window and the like in the plane drawing based on a geometric figure identification algorithm according to the component legend and legend information of the plane drawing, generating plane positioning data such as plane coordinates, plane geometric dimensions and the like of the components, and storing plane data.
2. Generating positioning data of the elevation drawing: according to a longitudinal section drawing of a subway station classified and sorted by a principle of longitudinal length and transverse length, component legend and legend information are extracted according to the longitudinal section drawing legend, and on the basis of a geometric figure recognition algorithm, component recognition such as building elevation, walls, beams, columns, plates, doors and windows and the like in the section drawing is carried out, so that vertical face positioning data such as vertical face coordinates, vertical face geometric dimensions and the like of the components are generated, and vertical face data storage is carried out.
Step S104, generating plane stretching of an entity of the subway station according to the plane data, generating facade stretching of the entity of the subway station according to the facade data, and fusing the plane stretching and the facade stretching to obtain a three-dimensional BIM (building information model) of the entity of the subway station, wherein the entity of the subway station comprises: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity.
Specifically, taking a beam entity of a subway station as an example, according to beam plane coordinates and plane geometric dimension data in plane drawing positioning data, generating plane stretching of a structural beam; according to the beam elevation coordinate and elevation geometric dimension data, generating elevation stretching of the structural beam, fusing the elevation stretching and the elevation stretching to generate a three-dimensional BIM model of the beam entities such as a station hall layer and a station platform layer, wherein the subway station entity comprises a floor slab entity, a wall entity, a column entity, a door and window entity and a hole entity besides the beam entity.
In addition, when the entity member is generated, a three-dimensional entity of a first entity may be generated, wherein the first entity includes: the beam entity, the floor entity, the wall entity and the column entity are attached to a wall entity component because of the placement of the door and the window, and the plane stretching of the door and the window is generated by combining the three-dimensional entity of the wall entity according to the door and window plane coordinates and the plane geometric dimension data in the plane drawing positioning data; generating vertical surface stretching of the door and window according to the vertical surface coordinates and the vertical surface geometric dimension data of the door and window, fusing the vertical surface stretching and the vertical surface geometric dimension data, generating three-dimensional hollow entities of the door and window such as a station hall layer, a station platform layer and the like on the wall, and then generating plane stretching of the hole according to the hole plane coordinates and the plane geometric dimension data in the plane drawing positioning data by combining the three-dimensional entities of the floor entity as the hole is attached to the floor entity component; according to the door and window vertical face coordinates and vertical face geometric dimension data, vertical face stretching of the hole is generated, the door and window vertical face stretching and the vertical face stretching are fused, three-dimensional hollow entities of the hole such as a station hall layer and a station layer are generated on the floor slab, and finally, a corresponding three-dimensional BIM model is obtained according to the three-dimensional entity of the first entity, the three-dimensional hollow entity of the door and window entity and the three-dimensional hollow entity of the hole entity.
The legend identification method for generating the three-dimensional BIM model from the two-dimensional drawing of the subway station, provided by the embodiment of the invention, comprises the steps of obtaining a civil engineering drawing, generating corresponding horizontal and vertical sectional drawing paper according to the civil engineering drawing, and classifying the horizontal and vertical sectional drawing paper; according to the classification result, obtaining a plan view and an elevation view of the subway station, extracting component legends of the plan view and the elevation view, and determining corresponding legend information according to the component legends, wherein the legend information comprises: line type, line width, color; identifying a shaft network legend in a plane graph and a building elevation in an elevation graph by combining the component legend and legend information, and obtaining plane data corresponding to the plane graph and elevation data corresponding to the elevation graph by combining a preset geometric figure identification algorithm; generating plane stretching of an entity of the subway station according to the plane data, generating facade stretching of the entity of the subway station according to the facade data, fusing the plane stretching and the facade stretching to obtain a three-dimensional BIM (building information model) of the entity of the subway station, wherein the entity of the subway station comprises: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity. Therefore, the drawing of the drawing is used as a recognition basis, when the civil engineering drawing is converted into the three-dimensional BIM model, the drawing does not depend on the layer data processing of the original drawing any more, the linkage application of the drawing is realized, the time for reconstructing the BIM model is shortened, and the recognition progress and the automation degree of the CAD drawing are greatly improved.
Fig. 2 is a legend identification system for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station, provided in an embodiment of the present invention, including: the model building method comprises an acquisition module S201, an extraction module S202, an identification module S203 and a model building module S204, wherein:
the acquisition module S201 is used for acquiring a civil engineering drawing, generating corresponding horizontal sectional drawing paper according to the civil engineering drawing, and classifying the horizontal sectional drawing paper.
An extracting module S202, configured to obtain a plan view and an elevation view of a subway station according to a classification result, extract component legends of the plan view and the elevation view, and determine corresponding legend information according to the component legends, where the legend information includes: line type, line width, color.
The identification module S203 is configured to combine the component legend and the legend information, identify an axis network legend in the plan view, identify a building elevation in the elevation view, and combine a preset geometric figure identification algorithm to obtain plane data corresponding to the plan view and elevation data corresponding to the elevation view.
The model building module S204 is configured to generate a plane stretch of an entity of the subway station according to the plane data, generate a facade stretch of the entity of the subway station according to the facade data, and obtain a three-dimensional BIM model of the entity of the subway station by fusing the plane stretch and the facade stretch, where the entity of the subway station includes: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity.
In one embodiment, the system may further comprise:
a first entity module, configured to generate a plane stretch of a first entity according to the plane data, generate an elevation stretch of the first entity according to the elevation data, and obtain a three-dimensional entity of the first entity by fusing the plane stretch and the elevation stretch, where the first entity includes: the beam entity, the floor entity, the wall entity, the post entity.
And the door and window entity module is used for combining the three-dimensional entity of the wall entity, generating plane stretching of the door and window entity according to the plane data, generating vertical face stretching of the door and window entity according to the vertical face data, and fusing the plane stretching and the vertical face stretching to obtain the three-dimensional hollow entity of the door and window entity.
And the hole entity module is used for combining the three-dimensional entity of the floor slab entity, generating plane stretching of the hole entity according to the plane data, generating vertical face stretching of the hole entity according to the vertical face data, and fusing the plane stretching and the vertical face stretching to obtain the three-dimensional hollow entity of the hole entity.
And the second model establishing module is used for obtaining a corresponding three-dimensional BIM model according to the three-dimensional entity of the first entity, the three-dimensional hollow entity of the door and window entity and the three-dimensional hollow entity of the hole entity.
In one embodiment, the system may further comprise:
and the second extraction module is used for extracting elevation legends and floor legends in the building elevation drawings, column legends, wall legends and door and window legends in the building plan drawings, floor legends and beam legends in the structural elevation drawings, and column legends, beam legends and hole legends in the structural plan drawings.
For specific limitation of the legend identification system for generating the three-dimensional BIM model from the two-dimensional drawing of the subway station, reference may be made to the above limitation of the legend identification method for generating the three-dimensional BIM model from the two-dimensional drawing of the subway station, which is not described herein again. All modules in the legend identification system for generating the three-dimensional BIM model by the two-dimensional drawing of the subway station can be completely or partially realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
Fig. 3 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 3: a processor (processor)301, a memory (memory)302, a communication Interface (Communications Interface)303 and a communication bus 304, wherein the processor 301, the memory 302 and the communication Interface 303 complete communication with each other through the communication bus 304. The processor 301 may call logic instructions in the memory 302 to perform the following method: acquiring a civil engineering drawing, generating corresponding horizontal and vertical split drawing paper according to the civil engineering drawing, and classifying the horizontal and vertical split drawing paper; according to the classification result, obtaining a plan view and an elevation view of the subway station, extracting component legends of the plan view and the elevation view, and determining corresponding legend information according to the component legends, wherein the legend information comprises: line type, line width, color; identifying a shaft network legend in a plane graph and a building elevation in an elevation graph by combining the component legend and legend information, and obtaining plane data corresponding to the plane graph and elevation data corresponding to the elevation graph by combining a preset geometric figure identification algorithm; generating plane stretching of an entity of the subway station according to the plane data, generating elevation stretching of the entity of the subway station according to the elevation data, and fusing the plane stretching and the elevation stretching to obtain a three-dimensional BIM (building information modeling) model of the entity of the subway station, wherein the entity of the subway station comprises: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity.
Furthermore, the logic instructions in the memory 302 may be implemented in software functional units and stored in a computer readable storage medium when sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the transmission method provided in the foregoing embodiments when executed by a processor, and for example, the method includes: acquiring a civil engineering drawing, generating corresponding horizontal and vertical split drawing paper according to the civil engineering drawing, and classifying the horizontal and vertical split drawing paper; according to the classification result, obtaining a plan view and an elevation view of the subway station, extracting component legends of the plan view and the elevation view, and determining corresponding legend information according to the component legends, wherein the legend information comprises: line type, line width, color; identifying an axis network legend in a plane graph and a building elevation in an elevation graph by combining the component legend and legend information, and obtaining plane data corresponding to the plane graph and elevation data corresponding to the elevation graph by combining a preset geometric figure identification algorithm; generating plane stretching of an entity of the subway station according to the plane data, generating facade stretching of the entity of the subway station according to the facade data, fusing the plane stretching and the facade stretching to obtain a three-dimensional BIM (building information model) of the entity of the subway station, wherein the entity of the subway station comprises: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity.
The above-described system embodiments are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A legend identification method for generating a three-dimensional BIM model through two-dimensional drawings of a subway station is characterized by comprising the following steps:
acquiring a civil engineering drawing, generating corresponding horizontal sectional drawing paper according to the civil engineering drawing, and classifying the horizontal sectional drawing paper;
according to the classification result, obtaining a plan view and an elevation view of the subway station, extracting component legends of the plan view and the elevation view, and determining corresponding legend information according to the component legends, wherein the legend information comprises: line type, line width, color;
identifying an axis network legend in the plane graph and identifying a building elevation in the elevation graph by combining the component legend and legend information, and obtaining plane data corresponding to the plane graph and elevation data corresponding to the elevation graph by combining a preset geometric figure identification algorithm;
generating plane stretching of an entity of the subway station according to the plane data, generating facade stretching of the entity of the subway station according to the facade data, and fusing the plane stretching and the facade stretching to obtain a three-dimensional BIM (building information model) of the entity of the subway station, wherein the entity of the subway station comprises: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity.
2. The legend recognition method for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station as claimed in claim 1, wherein the generating of the plane stretch of the entity of the subway station according to the plane data, the generating of the facade stretch of the entity of the subway station according to the facade data, and the fusing of the plane stretch and the facade stretch to obtain the three-dimensional BIM model of the entity of the subway station comprises:
generating plane stretching of a first entity according to the plane data, generating facade stretching of the first entity according to the facade data, and fusing the plane stretching and the facade stretching to obtain a three-dimensional entity of the first entity, wherein the first entity comprises: a beam entity, a floor entity, a wall entity and a column entity;
combining the three-dimensional entity of the wall entity, generating plane stretching of a door and window entity according to the plane data, generating vertical surface stretching of the door and window entity according to the vertical surface data, and fusing the plane stretching and the vertical surface stretching to obtain a three-dimensional hollow entity of the door and window entity;
combining the three-dimensional entity of the floor entity, generating plane stretching of the hole entity according to the plane data, generating vertical surface stretching of the hole entity according to the vertical surface data, and fusing the plane stretching and the vertical surface stretching to obtain a three-dimensional hollow entity of the hole entity;
and obtaining a corresponding three-dimensional BIM model according to the three-dimensional entity of the first entity, the three-dimensional hollow entity of the door and window entity and the three-dimensional hollow entity of the hole entity.
3. The legend recognition method for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station as claimed in claim 1, wherein said classification result comprises:
building elevation, building plan, structure elevation and structure plan;
the component illustration of the drawing plan view and the elevation view comprises:
extracting elevation legends and floor legends in building elevation drawings, column legends, wall legends and door and window legends in building plane drawings, floor legends and beam legends in structural elevation drawings, and column legends, beam legends and hole legends in structural plane drawings.
4. The method for identifying the legend of the three-dimensional BIM model generated by the two-dimensional drawing of the subway station as claimed in claim 1, wherein after classifying the paper of the horizontal and vertical section, the method further comprises:
and carrying out data cleaning on redundant contents of the vertical section drawing, wherein the redundant contents comprise: scattered line segments, multi-segment lines, annotations, and labels.
5. The method for identifying the legend of the three-dimensional BIM model generated from the two-dimensional drawing of the subway station as claimed in claim 1, wherein the component legend comprises:
reinforced concrete, mortar brick walls, common partition walls, fireproof partition walls and back walls.
6. A legend recognition system for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station is characterized by comprising:
the system comprises an acquisition module, a classification module and a classification module, wherein the acquisition module is used for acquiring a civil engineering drawing, generating corresponding horizontal split drawing paper according to the civil engineering drawing, and classifying the horizontal split drawing paper;
an extraction module, configured to obtain a plan view and an elevation view of a subway station according to a classification result, extract component legends of the plan view and the elevation view, and determine corresponding legend information according to the component legends, where the legend information includes: line type, line width, color;
the identification module is used for identifying the shaft network legend in the plane graph by combining the component legend and the legend information, identifying the building elevation in the elevation graph and obtaining plane data corresponding to the plane graph and elevation data corresponding to the elevation graph by combining a preset geometric figure identification algorithm;
the model building module is used for generating plane stretching of an entity of the subway station according to the plane data, generating vertical surface stretching of the entity of the subway station according to the vertical surface data, and fusing the plane stretching and the vertical surface stretching to obtain a three-dimensional BIM model of the entity of the subway station, wherein the entity of the subway station comprises: the beam entity, the floor entity, the wall entity, the column entity, the door and window entity, the hole entity.
7. The system for identifying legend of generating three-dimensional BIM model from two-dimensional drawing of subway station as claimed in claim 6, wherein said system further comprises:
a first entity module, configured to generate a plane stretch of a first entity according to the plane data, generate an elevation stretch of the first entity according to the elevation data, and obtain a three-dimensional entity of the first entity by fusing the plane stretch and the elevation stretch, where the first entity includes: a beam entity, a floor entity, a wall entity and a column entity;
the door and window entity module is used for combining the three-dimensional entity of the wall entity, generating plane stretching of the door and window entity according to the plane data, generating vertical face stretching of the door and window entity according to the vertical face data, and fusing the plane stretching and the vertical face stretching to obtain a three-dimensional hollow entity of the door and window entity;
the hole entity module is used for combining the three-dimensional entity of the floor slab entity, generating plane stretching of the hole entity according to the plane data, generating vertical face stretching of the hole entity according to the vertical face data, and fusing the plane stretching and the vertical face stretching to obtain a three-dimensional hollow entity of the hole entity;
and the second model establishing module is used for obtaining a corresponding three-dimensional BIM model according to the three-dimensional entity of the first entity, the three-dimensional hollow entity of the door and window entity and the three-dimensional hollow entity of the hole entity.
8. The system for identifying legend of generating three-dimensional BIM model from two-dimensional drawing of subway station as claimed in claim 6, wherein said system further comprises:
and the second extraction module is used for extracting elevation legends and floor legends in the building elevation drawings, column legends, wall legends and door and window legends in the building plan drawings, floor legends and beam legends in the structural elevation drawings, and column legends, beam legends and hole legends in the structural plan drawings.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and operable on the processor, wherein the processor implements the steps of the legend recognition method for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station as claimed in any one of claims 1 to 5 when executing the program.
10. A non-transitory computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements the steps of the legend identifying method for generating a three-dimensional BIM model from a two-dimensional drawing of a subway station as claimed in any one of claims 1 to 5.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115100362A (en) * | 2022-08-23 | 2022-09-23 | 航天正通汇智(北京)科技股份有限公司 | Space automatic modeling and visualization method based on four-color chart and oblique photography |
| CN115661553A (en) * | 2022-12-14 | 2023-01-31 | 深圳市地铁集团有限公司 | BIM-based rail transit member classification method, system and equipment |
| CN115935493A (en) * | 2023-03-15 | 2023-04-07 | 江西中至科技有限公司 | Method and system for converting two-dimensional CAD drawing into BIM model |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115100362A (en) * | 2022-08-23 | 2022-09-23 | 航天正通汇智(北京)科技股份有限公司 | Space automatic modeling and visualization method based on four-color chart and oblique photography |
| CN115100362B (en) * | 2022-08-23 | 2022-11-11 | 航天正通汇智(北京)科技股份有限公司 | Space automatic modeling and visualization method based on four-color chart and oblique photography |
| CN115661553A (en) * | 2022-12-14 | 2023-01-31 | 深圳市地铁集团有限公司 | BIM-based rail transit member classification method, system and equipment |
| CN115935493A (en) * | 2023-03-15 | 2023-04-07 | 江西中至科技有限公司 | Method and system for converting two-dimensional CAD drawing into BIM model |
| CN115935493B (en) * | 2023-03-15 | 2023-05-23 | 江西中至科技有限公司 | Method and system for converting two-dimensional CAD drawing into BIM model |
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