BIM (Building Information Modeling) construction simulation method and device based on live-action fitting, equipment and medium

Abstract

The invention discloses a BIM construction simulation method and device based on live-action fitting, equipment and a medium, and the method comprises the steps: determining the position of a fitting modeling base point of a BIM model in response to an obtained design drawing; acquiring inclined image data of an actual construction environment, and generating a three-dimensional point cloud model; modeling a BIM model at the base point position by using the three-dimensional point cloud model to obtain a fitting model; and making a construction simulation animation by using the fitting model. According to the method, fitting of the terrain live-action data of the actual construction site and the BIM proposed engineering project can be completed.

Description

Technical Field

[0001] The present application belongs to the field of digital simulation technology, and in particular, relates to a BIM construction simulation method, device, equipment and medium based on real-scene fitting. Background Art

[0002] Under complex construction terrain and environmental conditions, it is necessary to conduct preliminary planning for the design and construction of various types of projects, such as main structures, bridges, pipeline network relocation, underground space transformation, pipeline corridors, and pipe jacking projects.

[0003] Real-scene fitting BIM technology is a technology that combines the three-dimensional model of a building with the actual environment. It achieves full life cycle management of the building through real-time data updates and precise positioning. Its principle is to obtain the actual environmental information of the building through laser scanning, aerial photography and other means, and then match this information with the three-dimensional model of the building to achieve real-scene fitting. Digital simulation technology is a technology that combines the virtual world with the real world. Through computer simulation and emulation, it can predict the performance, structure and aesthetics of a building before it is actually built, providing architects with a new design space, allowing them to be more creative and better cope with various challenges in reality.

[0004] Since BIM models and real-life models are three-dimensional data models generated under different logics, in actual operation, the formation process of the two is complicated, involving the operation of various software and multiple intermediate format conversions. These three-dimensional model data formats vary greatly and cannot form a unified, standardized and efficient workflow, which has become a technical barrier hindering practical application. Summary of the invention

[0005] The purpose of this application is to overcome the defects of the prior art and provide a BIM construction simulation method, device, equipment and medium based on real-scene fitting, aiming to provide a construction simulation method that fits the real scene to the BIM model, solve the problem of data interoperability, and realize the transition of terrain data from two-dimensional to three-dimensional in the design and construction data processing process, so as to realize the process of engineering design and construction digital simulation directly based on the three-dimensional real-scene model.

[0006] The purpose of this application is achieved through the following technical solutions:

[0007] A BIM construction simulation method based on real scene fitting, the method comprising:

[0008] In response to the acquired design drawing, determining the position of the fitting modeling base point of the BIM model;

[0009] Obtain oblique image data of the actual construction environment and generate a 3D point cloud model;

[0010] Using the three-dimensional point cloud model to build a BIM model at the base point position to obtain a fitting model;

[0011] A construction simulation animation is produced using the fitting model.

[0012] Furthermore, the method further comprises:

[0013] The three-dimensional point cloud model is positioned in the actual environment corresponding to the fitting modeling base point by using a three-dimensional space physical mark, and the physical mark also includes a marking line.

[0014] Furthermore, the method further comprises:

[0015] Before the BIM model is built at the base point position using the three-dimensional point cloud model, the three-dimensional point cloud model is box-cut to select a preset range.

[0016] Furthermore, the BIM model building specifically includes:

[0017] The three-dimensional point cloud model is loaded, an elevation axis network is established, temporary construction facilities are loaded, and site layout design is performed.

[0018] Furthermore, the making of the construction simulation animation using the fitting model includes:

[0019] Place construction equipment, edit animation frames, perform construction simulation, and export construction simulation animation with real-life models.

[0020] On the other hand, the present invention also provides a BIM construction simulation device based on real scene fitting, the device comprising:

[0021] A base point calibration module, wherein the base point calibration module determines the position of the fitting modeling base point of the BIM model in response to the acquired design drawing;

[0022] A point cloud model building module, wherein the point cloud model building module acquires oblique image data of the actual construction environment and generates a three-dimensional point cloud model;

[0023] A fitting model building module, wherein the fitting model building module performs BIM model building at the base point position using the three-dimensional point cloud model to obtain a fitting model;

[0024] A construction simulation module is used to produce a construction simulation animation using the fitting model.

[0025] On the other hand, the present invention also provides a computer device, comprising a processor and a memory, wherein the memory stores a computer program, and the computer program is loaded and executed by the processor to implement any one of the above-mentioned digital twin model updating methods.

[0026] On the other hand, the present invention also provides a computer-readable storage medium, in which a computer program is stored. The computer program is loaded and executed by a processor to implement any one of the above-mentioned digital twin model updating methods.

[0027] The beneficial effects of this application are:

[0028] The present invention can utilize drones to collect actual on-site operating terrain data of a constantly changing project construction site in a certain period of time, and combine it with the BIM design model to complete the fitting of the actual construction site terrain real-life data with the BIM planned engineering project. This solution can be used for construction site planning, demolition plan optimization, construction simulation, etc. in different engineering categories, and assist in predicting adverse conditions in the construction site environment, which is conducive to more reasonable and scientific planning of construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a flowchart of a BIM construction simulation method based on real scene fitting in an embodiment of the present application;

[0030] Figure 2 It is a structural block diagram of a BIM construction simulation device based on real-scene fitting in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0032] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0033] Since BIM models and real-life models are three-dimensional data models generated under different logics, in actual operation, the formation process of the two is complicated, involving the operation of various software and multiple intermediate format conversions. These three-dimensional model data formats vary greatly and cannot form a unified, standardized and efficient workflow, which has become a technical barrier hindering practical application.

[0034] In order to solve the above technical problems, the following embodiments of the BIM construction simulation method, device, equipment and medium based on real-scene fitting are proposed in this application.

[0035] Example 1

[0036] Reference Figure 1 ,like Figure 1 The figure is a flowchart of the BIM construction simulation method based on real scene fitting in the embodiment of the present application. The method specifically includes the following steps:

[0037] Step 1: In response to the acquired design drawing, determine the position of the fitting modeling base point of the BIM model.

[0038] First, determine the BIM model fitting modeling base point position (absolute coordinates and elevation), and the fitting base point should be within the project red line. According to the design drawings, set the BIM model project base point at the axis grid origin. For example, if the first axis grid intersection of the project single axis grid XY is the intersection of axis A and axis 1, then the intersection of axis A and axis 1 of the project is used as the fitting base point. Adjust the project measurement point value to be consistent with the measurement point of the project drawing. For example, if the project measurement point values ​​are X=100m, Y=200m, and Z=300m, then in Revit, the project measurement point value should be set to X=200000mm, Y=100000mm, and elevation=300m.

[0039] Step 2: Obtain oblique image data of the actual construction environment and generate a 3D point cloud model.

[0040] Oblique image data is obtained by drone aerial photography. When fitting the modeling base point in the actual environment, the physical A mark is used for precise positioning. The physical mark points in the three-dimensional space must be clearly marked with lines. The physical A mark is used for precise positioning. The physical mark points in the three-dimensional space must be clearly marked with lines. Use surveying and mapping tools to clearly mark the project origin and the XYZ axis baseline in the drawing so that they can be accurately positioned when fitting after being imported into the BIM model. There should not be any obstructions in the physical A direction that block the line of sight. It should be marked as soon as possible, and attention should be paid to avoid visual impacts caused by temporary construction, material yards, earth excavation, etc.

[0041] Step 3: Use the three-dimensional point cloud model to build a BIM model at the base point position to obtain a fitting model.

[0042] According to the coverage and pixels of the drone camera, select an appropriate flight altitude, and perform drone aerial photography at a fixed flight altitude. After the shooting is completed, import the image data obtained by oblique photography into the modeling software, set the parameters and submit the aerial triangulation calculation, then perform three-dimensional reconstruction, and generate a three-dimensional point cloud model in las format. When the project volume is large, choose to split the model for calculation and export the three-dimensional point cloud model in multiple las file formats. The drone flight mode should be selected to shoot at a "certain time interval". When shooting, the drone shoots at a constant speed within the target range. After shooting, import the drone data into the computer device. Use professional software such as contextcapture to create a new project file, add the terrain data image collected by the drone, and import no less than 3 photographic images, then submit the aerial triangulation calculation, open the ContextCapture Engine software, and start the calculation. After the calculation is completed, you can browse the quality report and browse the data processing quality. Submit a new production project, select the target of submitting the production project as "3D point cloud", and the format will automatically jump to las. When the data volume is too large, select block calculation, click Submit, and start production operation

[0043] Import the las format model into the photogrammetry software for automatic stitching, export the complete rcp format project area point cloud model, and edit, repair and adjust the point cloud model in the photogrammetry software. Find the point cloud output location, open the photogrammetry software (such as Recap), and automatically stitch the point cloud model after importing the software. After stitching, you can use the editing tool to box-cut the point cloud model, and select the required range to make the point cloud model more regular. After processing, export the rcp format model.

[0044] Import the model in rcp format into revit, and make the three-dimensional space fitting base point of the object A in rcp coincide with the project base point and XYZ axis in revit. Import the processed point cloud model in rcp format into revit, and make the mark of the object A coincide with the fitting base point in the BIM project model, and overlap the baselines in all three-dimensional directions with the marking line of the object A in each plane and elevation, and the import step is completed.

[0045] Step 4: Create a construction simulation animation using the fitting model.

[0046] According to the terrain model, temporary construction facilities and equipment are loaded to design the site layout. BIM model is built, and the rationality of the original design drawing is reviewed according to the terrain conditions. The point cloud model and BIM model are exported to the Bimflim software in fbx format. The construction crane is placed in the BIMfilm software. The animation frames are edited to simulate the bridge construction. The construction simulation animation with the real scene model is exported. According to the requirements, the animation is edited again using the video post-editing software.

[0047] Open the BIM design software (Revit), load the point cloud model, and establish the elevation axis network to start deepening the BIM model and designing temporary construction. Create or link a BIM design model to optimize the layout of temporary roads and temporary facilities and equipment. Export the fitting model in fbx format to Bimflim software, which is a domestic construction simulation animation production software. Place components such as construction cranes, construction platforms, and construction personnel in BIMfilm software.

[0048] According to the conditions of the project construction site, adjust the entry and exit routes and rotation positions of the component lifting vehicles, arrange the necessary materials for construction at the planned construction site, click the animation tool in the tool tab, and edit the animation frames of the equipment lifting arm, lifting radius, walking path, position, etc. in the animation editing window to meet the construction specifications and safety construction requirements. Simulate the box girder lifting position and lifting action simulation.

[0049] After editing the animation, click the output option, select the storage path, camera, opening and ending credits, and other settings to complete the animation export.

[0050] This embodiment is specifically used for forward BIM design directly under the three-dimensional real-scene model in the design and planning stage of physical construction projects, or for construction site deployment, planning, and preview after the real-scene BIM model is fitted. It provides a construction simulation method for fitting the real scene to the BIM model, solves the problem of data interoperability, and realizes the transition from two-dimensional to three-dimensional terrain data utilization in the design and construction data processing process, thereby realizing the process of engineering design and construction digital simulation directly based on the three-dimensional real-scene model.

[0051] Example 2

[0052] Reference Figure 2 ,like Figure 2 The figure shows a structural block diagram of a BIM construction simulation device based on real scene fitting according to an embodiment of the present application. The device specifically includes the following structures:

[0053] A base point calibration module, the base point calibration module determines the position of the fitting modeling base point of the BIM model in response to the acquired design drawing;

[0054] Point cloud model building module, the point cloud model building module obtains the oblique image data of the actual construction environment and generates a three-dimensional point cloud model;

[0055] A fitting model building module, which uses a three-dimensional point cloud model to build a BIM model at a base point position to obtain a fitting model;

[0056] Construction simulation module, the construction simulation module uses fitting models to produce construction simulation animations.

[0057] Example 3

[0058] This preferred embodiment provides a computer device, which can implement the steps in any embodiment of the digital twin model update method provided in the embodiments of the present application. Therefore, the beneficial effects of the digital twin model update method provided in the embodiments of the present application can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0059] Example 4

[0060] Those skilled in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructions, or by controlling related hardware through instructions, and the instructions can be stored in a computer-readable storage medium and loaded and executed by a processor. To this end, an embodiment of the present invention provides a storage medium in which multiple instructions are stored, and the instructions can be loaded by a processor to execute the steps of any embodiment of the digital twin model update method provided in the embodiment of the present invention.

[0061] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0062] Since the instructions stored in the storage medium can execute the steps in any digital twin model update method embodiment provided in the embodiments of the present invention, the beneficial effects that can be achieved by any digital twin model update method provided in the embodiments of the present invention can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

[0063] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A BIM construction simulation method based on real scene fitting, characterized in that: The method comprises: In response to the acquired design drawing, determining the position of the fitting modeling base point of the BIM model; Obtain oblique image data of the actual construction environment and generate a 3D point cloud model; Using the three-dimensional point cloud model to build a BIM model at the base point position to obtain a fitting model; A construction simulation animation is produced using the fitting model.

2. The BIM construction simulation method based on real scene fitting according to claim 1, characterized in that: The method further comprises: The three-dimensional point cloud model is positioned in the actual environment corresponding to the fitting modeling base point by using a three-dimensional space physical mark, and the physical mark also includes a marking line.

3. The BIM construction simulation method based on real scene fitting according to claim 1, characterized in that: The method further comprises: Before the BIM model is built at the base point position using the three-dimensional point cloud model, the three-dimensional point cloud model is box-cut to select a preset range.

4. The BIM construction simulation method based on real scene fitting according to claim 1, characterized in that: The BIM model building specifically includes: The three-dimensional point cloud model is loaded, an elevation axis network is established, temporary construction facilities are loaded, and site layout design is performed.

5. The BIM construction simulation method based on real scene fitting according to claim 1, characterized in that: The making of the construction simulation animation by using the fitting model comprises: Place construction equipment, edit animation frames, perform construction simulation, and export construction simulation animation with real-life models.

6. A BIM construction simulation device based on real scene fitting, characterized in that: The device comprises: A base point calibration module, wherein the base point calibration module determines the position of the fitting modeling base point of the BIM model in response to the acquired design drawing; A point cloud model building module, wherein the point cloud model building module acquires oblique image data of the actual construction environment and generates a three-dimensional point cloud model; A fitting model building module, wherein the fitting model building module uses the three-dimensional point cloud model to build a BIM model at the base point position to obtain a fitting model; A construction simulation module is used to produce a construction simulation animation using the fitting model.

7. A computer device, characterized in that: The computer device includes a processor and a memory, wherein a computer program is stored in the memory, and the computer program is loaded and executed by the processor to implement the digital twin model updating method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, which is loaded and executed by a processor to implement the digital twin model updating method as described in any one of claims 1 to 5.

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