BIM-based vehicle model conversion and interference inspection methods, systems, equipment, and media

Abstract

This invention provides a method, system, equipment, and medium for BIM-based vehicle model conversion and interference checking, belonging to the field of rail vehicle information modeling technology. The method includes the following steps: exporting the industrial design 3D model of the vehicle into a model file in a universal 3D data exchange format; importing the model file into intermediate processing software for loading and processing to form a target model; generating project-level BIM models and component-level BIM models based on the target model, and adding parameter information to the components of the project-level and component-level BIM models during the model conversion process; introducing the project-level BIM model as a link model into the BIM software environment, or loading the component-level BIM model file for spatial assembly to form a complete vehicle or multi-train vehicle model; and importing the complete vehicle or multi-train vehicle model into interference checking and analysis software to output spatial interference information.

Description

Technical Field

[0001] This invention belongs to the field of rail vehicle information modeling technology, and in particular relates to a method, system, equipment and medium for BIM-based vehicle model conversion and interference checking. Background Technology

[0002] With the rapid development of rail transit equipment manufacturing technology, the structural complexity, system integration, and design refinement of products such as high-speed trains, light rail vehicles, and subway vehicles are constantly increasing. Currently, professional CAD 3D design software such as PTC Creo is widely used in the vehicle industrial design stage to complete the 3D modeling of the entire vehicle and its various systems. This type of industrial design software possesses strong geometric modeling and assembly design capabilities, supporting industrial design needs such as vehicle structural design and equipment layout. It can also export models to common 3D data formats such as STP (STEP), enabling model interaction between different software programs.

[0003] However, in practical engineering applications, vehicle 3D models based on the STP format generally suffer from the following technical problems: I. Lack of systematic spatial conflict detection and interference inspection functions Industrial design software such as PTC Creo primarily focuses on geometric modeling and engineering design, emphasizing component structure representation and assembly relationship description. It typically lacks systematic spatial conflict detection and interference checking capabilities. In vehicle system integration, the spatial relationships between various specialized equipment are complex. Under current technological conditions, designers often rely on manual inspection and experience-based judgment to identify potential interference problems. This method is not only inefficient but also prone to omissions, failing to meet the reliability and consistency requirements of complex vehicle products.

[0004] Second, the model's information expression capability is insufficient, making it difficult to meet the needs of digital management and in-depth application. Existing industrial design software has significant shortcomings in terms of information representation. Its models are usually based primarily on geometric information, making it difficult to flexibly add multi-dimensional custom parameter data such as equipment codes, system attributes, installation locations, and maintenance information to model components, unlike Building Information Modeling (BIM) software. This, to some extent, limits the in-depth application of vehicle 3D models in design management, digital delivery, and operation and maintenance support.

[0005] III. Difficulties in integrating industrial design models with BIM applications Due to limitations in model size, information representation, and functionality, vehicle industrial design models are difficult to directly apply in BIM software for in-depth development. The model conversion efficiency is low, and information loss is severe. There is a lack of a model conversion and information reconstruction method suitable for vehicle industrial design scenarios.

[0006] In summary, existing technologies urgently need a BIM-based vehicle model conversion and interference checking method to improve the digitalization level and design quality of the vehicle design phase. Summary of the Invention

[0007] This invention aims to solve the above-mentioned technical problems, thereby providing a BIM-based method for lightweight conversion and parametric interference checking of vehicle 3D models. To achieve the above-mentioned objectives, this invention provides a BIM-based vehicle model conversion and interference checking method, comprising the following steps: The industrial design 3D model of the vehicle is exported as a model file in a universal 3D data exchange format. The model file contains geometric information, assembly hierarchy relationships, and constraint logic. The model file is imported into intermediate processing software for loading and processing. During the processing, the intermediate processing software maintains the original assembly structure, hierarchical relationship and constraint logic of the model file, and filters, deletes or supplements the model file according to the preset design requirements to form the target model. Based on the target model, a project-level BIM model and a component-level BIM model are generated respectively, and parameter information is added to the components of the project-level BIM model and the component-level BIM model during the model conversion process; The project-level BIM model is introduced into the BIM software environment as a link model, or the component-level BIM model file is loaded and spatially assembled to form a complete vehicle or multi-unit vehicle model. The whole vehicle or multi-unit vehicle model is imported into the interference inspection and analysis software. Interference detection is performed on the spatial relationship between the specified systems or component sets according to the set minimum safety clearance, and spatial interference information is output.

[0008] Furthermore, the general three-dimensional data exchange format is the STP format.

[0009] Furthermore, the intermediate processing software is Autodesk Inventor, and the preset design requirement is to split the model according to vehicle groups, splitting each carriage as a whole, while keeping the relative positions of the components inside a single carriage unchanged.

[0010] Furthermore, the project-level BIM model exists in the BIM project in the form of a system family, and the component-level BIM model is a component family model.

[0011] Furthermore, the parameter information includes system attributes, component categories, function identifiers, and management parameters.

[0012] Furthermore, the project-level BIM model format is Rvt format, and the component-level BIM model format is rfa format.

[0013] Furthermore, the specific method for generating the component-level BIM model is as follows: in the intermediate processing software, the target model is exported as an RFA format family file through the BIM content export function, and then loaded into the Autodesk Revit software for placement.

[0014] Furthermore, the specific method for generating project-level BIM model files is as follows: in the intermediate processing software, the target model is directly exported as an Rvt format project file, and then linked to the Autodesk Revit software for integration.

[0015] Furthermore, in forming the whole vehicle or multi-group vehicle model, the absolute coordinates of each group model are set according to the actual vehicle grouping scheme and the grouping order to correct the deviation caused by the difference in coordinate system.

[0016] Furthermore, the interference inspection and analysis software is Autodesk Navisworks, which locks the set of components to be inspected by creating a selection set and determines interference based on a preset safety gap threshold.

[0017] Furthermore, it also includes geometric simplification and data compression of whole vehicle or multi-unit vehicle models to obtain a lightweight BIM model.

[0018] This invention provides a BIM-based lightweight vehicle model conversion and parametric interference checking system, comprising: The intermediate processing module includes intermediate processing software, which is used to receive model files in a general three-dimensional data exchange format generated by industrial design software. During the processing, the intermediate processing software maintains the original assembly structure, hierarchical relationship and constraint logic of the model file, and filters, deletes or supplements the model file according to preset design requirements to form a target model. The BIM model generation module is used to generate project-level BIM models and component-level BIM models based on the target model, and to add parameter information to the components of the project-level BIM model and component-level BIM model during the model conversion process. The assembly module is used to introduce the project-level BIM model as a link model into the BIM software environment, or load the component-level BIM model file to perform spatial assembly and form a complete vehicle or multi-unit vehicle model. The interference check module is used to import the assembled BIM model into the interference check analysis software, perform interference detection on the spatial relationship between specified systems or component sets according to the set minimum safety clearance, and output spatial interference information.

[0019] Furthermore, the general three-dimensional data exchange format is the STP format.

[0020] Furthermore, the intermediate processing software is Autodesk Inventor, and the preset design requirement is to split the model according to vehicle groups, splitting each carriage as a whole, while keeping the relative positions of the components inside a single carriage unchanged.

[0021] Furthermore, the project-level BIM model exists in the BIM project in the form of a system family, and the component-level BIM model is a component family file.

[0022] Furthermore, the project-level BIM model format is RVT format, and the component-level BIM model format is RFA format.

[0023] Furthermore, the parameter information includes system attributes, component categories, function identifiers, and management parameters.

[0024] Furthermore, the BIM model generation module is also used in the intermediate processing software to export the target model as an RFA format family file through the BIM content export function, and then load it into the Autodesk Revit software for placement.

[0025] Furthermore, the BIM model generation module is also used to directly export the model as an RVT format project file in the intermediate processing software, and then link it to the Autodesk Revit software for integration.

[0026] Furthermore, the assembly module is also used to set the absolute coordinates of each group model according to the actual vehicle grouping scheme and the grouping order, so as to correct the deviation caused by the difference in coordinate system.

[0027] Furthermore, the interference inspection and analysis software is Autodesk Navisworks, which locks the set of components to be inspected by creating a selection set and determines interference based on a preset safety gap threshold.

[0028] Furthermore, it also includes a lightweight export module, which is used to perform geometric simplification and data compression on whole vehicle or multi-group vehicle models to obtain a BIM model in lightweight model format.

[0029] The present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method of any one of claims 1 to 12.

[0030] The present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method of any one of claims 1 to 12.

[0031] Advantages and advancements of this invention compared to existing technologies 1. Significantly reduces model data size and hardware dependency. This invention significantly reduces the size of vehicle industrial design 3D models by performing phased conversion and lightweighting processes, while maintaining key geometric features and assembly relationships. Industrial design 3D models that originally reached tens of gigabytes in size can be converted into BIM model files of only a few hundred megabytes, thereby significantly reducing the requirements for computer hardware configuration and enabling design terminals with ordinary configurations to complete model loading, browsing, and analysis.

[0032] 2. Achieving parameterized model representation while maintaining lightweight design. This invention not only achieves lightweight processing of 3D models, but also adds multi-dimensional parametric information to BIM model components during the model conversion process, upgrading the model from a single geometric representation to an information-based model. This parametric model can carry vehicle system attributes, component identification, and management information, providing a reliable data foundation for subsequent design management, system integration, and digital applications.

[0033] 3. Automate the interference checking process to improve design reliability. By using a lightweight BIM model for interference inspection analysis, this invention enables the automatic identification of spatial conflicts between various vehicle systems, avoiding the traditional reliance on manual observation and experience-based judgment. This effectively improves the efficiency and accuracy of interference inspection and reduces the risk of design omissions.

[0034] 4. Enhance the integration of vehicle industrial design and BIM applications. This invention establishes a complete technical path from 3D vehicle industrial design models to BIM models, enabling industrial design models to directly serve the integrated analysis and in-depth application of BIM platforms, expanding the application scope of vehicle 3D models, and improving the digitalization level and collaborative efficiency of vehicle products in the design phase. Attached Figure Description

[0035] Figure 1 This is a flowchart of the BIM-based vehicle model conversion and interference checking method of the present invention; Figure 2 Adding a schematic diagram of parameter information in Revit software; Figure 3 This is a schematic diagram of a secondary assembly model in Inventor software; Figure 4 This is a lightweight, non-interference BIM federated model; Figure 5 To perform automatic interference detection in Navisworks software. Detailed Implementation

[0036] To better understand the purpose, structure, and function of this invention, the following detailed description of the BIM-based vehicle model conversion and interference inspection method, system, equipment, and medium, in conjunction with the accompanying drawings, is provided.

[0037] Reference Figure 1 The technical solution based on BIM vehicle model conversion and interference checking method of this invention includes the following steps: Step 1: Export the vehicle's industrial design 3D model as a model file in a universal 3D data exchange format.

[0038] After completing the design of a vehicle or system-level 3D model using vehicle industrial design software, the industrial design 3D model is exported as a model file in the Common 3D Data Exchange Format (STP). The model file contains the geometric information of each vehicle component, assembly hierarchy relationships, and constraint logic.

[0039] Step 2: Import the 3D model file in a common format into the intermediate processing software Autodesk Invebtor for loading and processing. During the processing, the intermediate processing software maintains the original assembly structure, hierarchical relationship and constraint logic of the model, ensuring that the relative positional relationship and assembly relationship between the various parts of the vehicle are accurately inherited.

[0040] In this step, the imported model can be further processed according to actual design needs. The model files can be filtered, deleted, or supplemented according to preset design requirements to form a target model that meets the needs of subsequent BIM conversion and application. For example, if the preset design requirement is to split the model by vehicle group, each carriage can be split as a whole, while the relative positions of the components within a single carriage remain unchanged.

[0041] Step 3: Based on the target model, generate project-level BIM model and component-level BIM model respectively, and add parameter information to the components of project-level BIM model and component-level BIM model during the model conversion process.

[0042] Based on the intermediate-processed target model, the following two types of BIM model files are generated: 1) Project-level BIM model files In the intermediate processing software, the target model is directly exported as a project-level BIM model format (Rvt format), and then linked to Autodesk Revit for integration. This allows the model to exist in the BIM project as a system family, resulting in a smaller BIM model with high loading efficiency, suitable for overall layout and integrated analysis scenarios.

[0043] 2) Component-level BIM model files In the intermediate processing software, the BIM content export function converts the parts or subassemblies in the target model into a component-level BIM model format (rfa format), generating a reusable component family model that can be repeatedly loaded and reused. This model is then loaded into Autodesk Revit for placement, enabling the construction of an scalable vehicle component library to meet the reuse requirements of multiple projects and vehicle models, and is suitable for projects with high assembly accuracy requirements.

[0044] During the model conversion process, vehicle design-related parameter information is added to the BIM model components, including but not limited to system attributes, component categories, functional identifiers, and management parameters, to achieve parametric representation of the model, as shown in the reference. Figure 2 .

[0045] Step 4: BIM-based vehicle model assembly Based on assembly accuracy requirements, select a project-level BIM model file as the link model and import it into the BIM software environment, or load a component-level BIM model file. Then, according to the actual vehicle formation plan, spatially assemble multiple vehicle units to form a complete vehicle or multi-unit vehicle model. Based on the actual vehicle formation plan, set the absolute coordinates of each unit model according to the formation sequence to correct deviations caused by coordinate system differences. (Refer to...) Figure 3 .

[0046] By assembling the models through a linking method, redundancy in model data is avoided. The absolute coordinates of each group of models are set according to the grouping order to correct deviations caused by differences in coordinate systems. This improves the efficiency of model loading and operation while ensuring the accuracy of the overall spatial relationships.

[0047] Step 5: Lightweight processing and analysis model generation After assembling the vehicle BIM model, the assembled BIM model is exported as a lightweight model format (NWC format) for analysis applications. Geometric simplification and data compression are then performed on the whole vehicle or multi-unit vehicle model to obtain the lightweight BIM model, thereby reducing the model size and improving subsequent analysis performance. (Refer to...) Figure 4 .

[0048] Step Six: Automated Interference Inspection The lightweight model is imported into the interference inspection and analysis software Autodesk Navisworks. For the spatial relationships between specified systems or sets of components, interference detection is performed based on a set minimum safety clearance, outputting spatial interference information. A selection set is created to lock the set of components to be inspected, and interference is determined according to a preset safety clearance threshold. Figure 5 .

[0049] Interference checking automatically identifies and outputs spatial interference information between various vehicle systems, thereby achieving automated interference checking of the vehicle industrial design model. Specific Implementation

[0050] This solution uses a 5-car low-floor light rail vehicle (car formation: -M+F+Mp+F+Mc-) as a case study, simplifying the entire process from the PTCCreo industrial design model, through Inventor processing and Revit conversion, to Navisworks assembly and interference checking. The logic is clear, the steps are concise, and it is easy to understand and operate quickly. The core solution addresses the conversion deviation between Creo / Inventor relative constraint coordinates and Revit / Navisworks absolute coordinates, ensuring accurate interference checking.

[0051] Step 1: Exporting the PTC Creo model 1. Open PTC Creo, load the 5-car low-floor light rail vehicle assembly model, and confirm that the electrical equipment (VVVF box, rheostat brake box, etc.), cables, and cab components are complete and the assembly constraints are correct.

[0052] 2. Export STP format file: Execute "File → Save Copy → Export", select STP format, check "Preserve geometry information, assembly level, and constraint relationship", set the unit to millimeters, and name it "Low Floor Light Rail Car 5-Series Complete Vehicle.STP" to ensure no data loss during subsequent import.

[0053] Step 2: Inventor Model Processing and Splitting 1. Load the model: Open Autodesk Inventor, import the above STP file, check "Preserve assembly structure and constraints", set the unit to millimeters, and check that the model is complete and without any missing parts or misalignments.

[0054] 2. Model selection: Remove redundant content such as non-core bogie components and non-electrical decorative parts, and retain core components such as electrical equipment, cables, cab and fixed brackets.

[0055] 3. Grouping and splitting: Prioritize splitting by group, treating each car as a whole and splitting it into 5 independent groups (M1-Mc5). Each group is saved separately in Inventor IPT format to ensure that the relative positions of the internal components of a single car remain unchanged.

[0056] Step 3: Two methods for exporting Revit models to NWC Both solutions enable the conversion from Inventor to Revit and then to NWC. The core difference lies in the model type (family file / system family) and reusability: Solution A exports RFA family files, which can be reused in multiple projects; Solution B exports RVT system families, which can only be used in this project. You can choose according to your actual needs.

[0057] Option A: Refined Placement Solution (Suitable for designs requiring precise positioning) This solution involves exporting family files from Inventor and manually placing them in Revit, making it suitable for scenarios with strict requirements on component placement.

[0058] Export RFA family: Open the IPT file for each group and ensure the Revit Interoperability plugin is installed. Execute "Environment → BIM Content → Export Building Components", select RFA format, and name it as "Group + Component Type" (e.g., "Group 1_VVVF Box.rfa") to batch export all core components.

[0059] Loading and Placing in Revit: Launch Revit and create a new project. Execute "File → Load from Library → Load Families" to import all RFA files in batches. Then, use "Insert → Place Families" to precisely place each component into its corresponding group's design location according to the design drawings, forming a complete Revit model.

[0060] Export to NWC: Export the Revit model of each group as an NWC file (File → Export → NWC), check "Geometric Simplification" and "Data Compression", and name them "Group 1.NWC" to "Group 5.NWC".

[0061] Option B: Rapid Assembly Solution (Applicable to overall assembly and analysis) This solution skips the manual placement step and directly integrates the RVT model exported from Inventor into Revit, making it more efficient.

[0062] Exporting Inventor as RVT: Open the split, single-section grouped IPT model. Directly execute "File → Export → Export as RVT", select RVT format, and use millimeters as the unit. This step directly converts the Inventor model into a project file that can be edited in Revit, without the need for loading and placing families.

[0063] Revit Integration and NWC Export: Launch Revit and create a new blank project. Link the exported RVT files of each group sequentially into the current project (Insert → Link Revit). Revit will automatically preserve the relative positions of each group in Inventor. Finally, export the integrated project as a whole as an NWC file to obtain a lightweight model file for Navisworks assembly.

[0064] During the model conversion process, vehicle design-related parameter information is added to the BIM model components, including but not limited to system attributes, component categories, functional identifiers, and management parameters, to achieve parametric representation of the model, as shown in the reference. Figure 2 .

[0065] Step 4: Assemble the Navisworks model, refer to... Figure 3 . 1. Preparation: Start Navisworks Manage and identify the core differences—Creo / Inventor uses relative constrained coordinates, while Revit / Navisworks uses absolute world coordinates. Direct conversion will cause group misalignment, requiring reassembly and calibration.

[0066] 2. Load the model: Create a new blank project, and load the 5 grouped NWC files in sequence through "Home → Project → Attachments" (Navisworks only loads NWC format), temporarily placing them to avoid overlap.

[0067] 3. Assembly and calibration: Using group 1 as the reference (placed at the origin X=0, Y=0, Z=0), use the "Transform" tool to input the absolute coordinates and adjust the positions of groups 2-5 in sequence to ensure that they are hinged in the order of "M→F→Mp→F→Mc", with a spacing of 150mm between adjacent groups and the track surfaces aligned. Correct any coordinate deviations.

[0068] 4. Save the project: After assembly, save it as "5-car train assembly.NWF" for subsequent interference checks.

[0069] Step 5: Lightweight processing and analysis model generation After assembling the vehicle BIM model, the assembled BIM model is exported as a lightweight model format (nwc format) for analysis applications. The model undergoes geometric simplification and data compression to reduce its size and improve subsequent analysis performance. (Refer to...) Figure 4 .

[0070] Step Six: Navisworks Automated Interference Inspection 1. Preliminary preparation: Open the assembled NWF project and create 3 selection sets - electrical equipment set (VVVF box, etc.), cable set, and cab set to accurately locate the inspection objects.

[0071] 2. Setting standards: According to design specifications, set minimum safety clearances—≥50mm between electrical equipment and cables, and ≥100mm between electrical equipment and the driver's cab. Clearances smaller than these are considered interference.

[0072] 3. Perform the inspection: Launch the "Clash Detective" tool, create two test tasks (Electrical Equipment - Cable, Electrical Equipment - Cab), set the parameters and run the test. The software will automatically identify the interference points.

[0073] 4. Results Processing: Review the interference details, sort them by severity, make targeted adjustments (such as adjusting cable routing or equipment location), retest after processing until there is no interference, and finally export a detailed PDF report.

[0074] Through the above technical solution, the present invention realizes the efficient conversion of industrial design 3D models from the design stage to the BIM application stage. While maintaining the accuracy of the model assembly logic, it completes the lightweight processing, parametric construction and automated interference checking of the model, which is suitable for industrial design and system integration scenarios of complex vehicle products such as high-speed trains, light rail vehicles and subway vehicles.

[0075] This invention also provides a BIM-based lightweight vehicle model conversion and parametric interference checking system for implementing the above method, comprising: The intermediate processing module includes intermediate processing software, which receives model files in the Common 3D Data Exchange Format (STP) generated by industrial design software. During processing, the intermediate processing software maintains the original assembly structure, hierarchical relationship, and constraint logic of the model file, and filters, deletes, or supplements the model file according to preset design requirements to form a target model. For example, the preset design requirement is to split the model according to vehicle groups, splitting each carriage as a whole, while keeping the relative positions of the components within a single carriage unchanged.

[0076] The Autodesk Inventor BIM model generation module is used to generate project-level and component-level BIM models based on the target model. During the model conversion process, it adds parameter information to the components of both the project-level and component-level BIM models. This parameter information includes system attributes, component categories, functional identifiers, and management parameters. The project-level BIM model exists in the BIM project as a system family, while the component-level BIM model is a component family file.

[0077] The Autodesk Revit assembly module is used to import the project-level BIM model as a link model into the BIM software environment, or load component-level BIM model files for spatial assembly to form a complete vehicle or multi-unit vehicle model. The lightweight export module is used to perform geometric simplification and data compression on whole vehicle or multi-group vehicle models to obtain a lightweight BIM model.

[0078] The Clash Decetive interference detection module is used to import lightweight BIM models into interference detection analysis software. It performs interference detection on the spatial relationships between specified systems or component sets according to the set minimum safety clearance and outputs spatial interference information.

[0079] The present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the above-described method.

[0080] The present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-described method.

Claims

1. A method for BIM-based vehicle model conversion and interference checking, characterized in that: Includes the following steps: The industrial design 3D model of the vehicle is exported as a model file in a universal 3D data exchange format. The model file contains geometric information, assembly hierarchy relationships, and constraint logic. The model file is imported into intermediate processing software for loading and processing. During the processing, the intermediate processing software maintains the original assembly structure, hierarchical relationship and constraint logic of the model file, and filters, deletes or supplements the model file according to the preset design requirements to form the target model. Based on the target model, a project-level BIM model and a component-level BIM model are generated respectively, and parameter information is added to the components of the project-level BIM model and the component-level BIM model during the model conversion process; The project-level BIM model is introduced into the BIM software environment as a link model, or the component-level BIM model file is loaded and spatially assembled to form a complete vehicle or multi-unit vehicle model. The whole vehicle or multi-unit vehicle model is imported into the interference inspection and analysis software. Interference detection is performed on the spatial relationship between the specified systems or component sets according to the set minimum safety clearance, and spatial interference information is output.

2. The BIM-based vehicle model conversion and interference checking method according to claim 1, characterized in that: The general-purpose three-dimensional data exchange format is the STP format.

3. The BIM-based vehicle model conversion and interference checking method according to claim 1, characterized in that: The intermediate processing software is Autodesk Inventor. The preset design requirement is to split the model file according to the vehicle group, split each car as a whole, and keep the relative positions of the components in a single car unchanged.

4. The BIM-based vehicle model conversion and interference checking method according to claim 1, characterized in that: The project-level BIM model exists in the BIM project in the form of a system family, and the component-level BIM model is a component family model.

5. The method for lightweight conversion and parametric interference inspection of vehicle 3D models based on BIM according to claim 1, characterized in that, The parameter information includes system attributes, component categories, function identifiers, and management parameters.

6. The method for lightweight conversion and parametric interference checking of BIM-based vehicle 3D models according to claim 1, characterized in that, The project-level BIM model format is Rvt format, and the component-level BIM model format is rfa format.

7. The method for lightweight conversion and parametric interference inspection of vehicle 3D models based on BIM according to claim 1, characterized in that, The specific method for generating a component-level BIM model is as follows: In the intermediate processing software, the target model is exported as a family file in RFA format through the BIM content export function, and then loaded into the Autodesk Revit software for placement.

8. The method for lightweight conversion and parametric interference inspection of vehicle 3D models based on BIM according to claim 1, characterized in that, The specific method for generating project-level BIM model files is as follows: In the intermediate processing software, the target model is directly exported as an Rvt format project file, and then linked to the Autodesk Revit software for integration.

9. The method for lightweight conversion and parametric interference inspection of vehicle 3D models based on BIM according to claim 1, characterized in that, The process of forming a complete vehicle or multi-unit vehicle model includes: setting the absolute coordinates of each unit model according to the actual vehicle formation scheme and the formation order, and correcting deviations caused by differences in coordinate systems.

10. The method for lightweight conversion and parametric interference inspection of vehicle 3D models based on BIM according to claim 1, characterized in that, The interference inspection and analysis software is Autodesk Navisworks. It locks the set of components to be inspected by creating a selection set and determines interference based on a preset safety gap threshold.

11. A method for BIM-based vehicle model conversion and interference checking according to any one of claims 1 to 10, characterized in that: It also includes geometric simplification and data compression of whole vehicle or multi-unit vehicle models to obtain a lightweight BIM model.

12. A BIM-based lightweight vehicle model conversion and parametric interference inspection system, characterized in that, include: The intermediate processing module includes intermediate processing software, which is used to receive model files in a general three-dimensional data exchange format generated by industrial design software. During the processing, the intermediate processing software maintains the original assembly structure, hierarchical relationship and constraint logic of the model file, and filters, deletes or supplements the model file according to preset design requirements to form a target model. The BIM model generation module is used to generate project-level BIM models and component-level BIM models based on the target model, and to add parameter information to the components of the project-level BIM model and component-level BIM model during the model conversion process. The assembly module is used to introduce the project-level BIM model as a link model into the BIM software environment, or load the component-level BIM model file to perform spatial assembly and form a complete vehicle or multi-unit vehicle model. The interference check module is used to import the assembled BIM model into the interference check analysis software, perform interference detection on the spatial relationship between specified systems or component sets according to the set minimum safety clearance, and output spatial interference information.

13. The system according to claim 12, characterized in that, The general-purpose three-dimensional data exchange format is the STP format.

14. The system according to claim 12, characterized in that, The intermediate processing software is Autodesk Inventor. The preset design requirement is to split the model according to the vehicle group, split each car as a whole, and keep the relative positions of the components in a single car unchanged.

15. The system according to claim 12, characterized in that, The project-level BIM model exists in the BIM project in the form of system families, and the component-level BIM model is a component family file.

16. The system according to claim 12, characterized in that, The project-level BIM model is in RVT format, and the component-level BIM model is in RFA format.

17. The system according to claim 12, characterized in that, The parameter information includes system attributes, component categories, function identifiers, and management parameters.

18. The system according to claim 12, characterized in that, The BIM model generation module is also used in the intermediate processing software to export the target model as an RFA format family file through the BIM content export function, and then load it into the Autodesk Revit software for placement.

19. The system according to claim 12, characterized in that, The BIM model generation module is also used to: directly export the model as an RVT format project file in the intermediate processing software, and then link it to Autodesk Revit software for integration.

20. The system according to claim 12, characterized in that, The assembly module is also used to set the absolute coordinates of each group model according to the actual vehicle grouping scheme and the grouping order, so as to correct the deviation caused by the difference in coordinate system.

21. The system according to claim 12, characterized in that, The interference inspection and analysis software is Autodesk Navisworks. It locks the set of components to be inspected by creating a selection set and determines interference based on a preset safety gap threshold.

22. The system according to any one of claims 12 to 21, characterized in that, It also includes a lightweight export module, which is used to perform geometric simplification and data compression on whole vehicle or multi-group vehicle models to obtain a lightweight BIM model.

23. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method of any one of claims 1 to 11.

24. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method of any one of claims 1 to 11.

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