Vision-based Building Information Model (BIM) updating method and system

Abstract

The present invention proposes a vision-based building information model (BIM) updating method and system, the method comprising: generating an update path according to the area to be updated and / or the structure to be updated in the original building information model (BIM); obtaining image data collected by an image acquisition device during movement in a building along the update path and position information of the image data corresponding to the acquisition area, performing three-dimensional modeling on the area to be updated and / or the structure to be updated according to the image data, determining description information of the area to be updated and / or the structure to be updated, the description information including position coordinates, three-dimensional dimensions and / or structure type; updating the original building information model (BIM) according to the description information of the area to be updated and / or the structure to be updated. The present invention does not need to indirectly update the BIM model by updating drawings, thus reducing the workload, while reducing the errors caused by drawing import and conversion, and improving the efficiency and accuracy of BIM updates.

Description

Technical Field

[0001] The present invention relates to the field of computer processing technology, and in particular to a vision-based building information model (BIM) updating method and system. Background Art

[0002] The update of existing BIM models mainly relies on technicians to measure existing buildings through RTK and total station, and feed back the results to the design institute for CAD drawing reconstruction. The reconstructed CAD drawings are compared with the original CAD drawings to find the changed locations, and the changed information is compared with the BIM model one by one for modification.

[0003] There are three major types of problems in this method, namely, positioning link errors, limited number of measurement points, and inability to reflect the update of equipment in the building. RTK is used to directly measure the coordinates of spatial points in the building. Since RTK technology can measure in motion, it can quickly and conveniently obtain the coordinates of a large number of data points, effectively improving the measurement efficiency. However, the reconstruction process of absolute coordinates easily introduces random errors in the positioning link of the measurement device itself, resulting in distortion of the measurement results and actual results, thus affecting the reconstruction effect. The total station is used to measure the relative coordinates of spatial points in the building. After the total station coordinate system and the building coordinate system are transformed and calibrated, the error of the positioning link of the measurement device itself is effectively eliminated, and more accurate measurements can be made. However, considering that the total station measurement requires the use of a measuring spherical mirror, it is inconvenient to measure some high points, and it is easy to lose the tracking effect due to object occlusion. Multiple deployment locations are required, and each deployment requires the conversion relationship between the total station coordinate system and the building coordinate system to be recalibrated. Therefore, the measurement process is very complicated and is only suitable for measurement needs and construction BIM updates during construction. Summary of the invention

[0004] In view of the above problems, the present invention is proposed to provide a vision-based building information model (BIM) updating method and system that overcomes the above problems or at least partially solves the above problems.

[0005] In one aspect, the present invention provides a vision-based building information model (BIM) updating method, the method comprising:

[0006] Generate an update path according to the area to be updated and / or the structure to be updated in the original building information model BIM;

[0007] Acquire image data acquired by an image acquisition device during movement along the update path in the building corresponding to the building information model and position information of an acquisition area corresponding to each image data, wherein the image data includes a current image of the area to be updated and / or the structure to be updated;

[0008] Performing three-dimensional modeling of the area to be updated and / or the structure to be updated according to the image data, and determining description information of the area to be updated and / or the structure to be updated, wherein the description information includes position coordinates, three-dimensional size and / or structure type;

[0009] The original building information model BIM is updated according to the description information of the area to be updated and / or the structure to be updated.

[0010] Furthermore, the step of acquiring the image data acquired by the image acquisition device during its movement along the update path in the building corresponding to the building information model and the position information of the acquisition area corresponding to each image data includes:

[0011] The image acquisition device is positioned based on multiple ultra-wideband UWB base stations pre-deployed at designated locations in the building and ultra-wideband UWB tags installed on the image acquisition device;

[0012] The position information of the acquisition area corresponding to the image data acquired by the image acquisition device is obtained according to the positioning information of the image acquisition device.

[0013] Furthermore, at least four UWB base stations are arranged on each floor of the building.

[0014] Furthermore, the positioning of the image acquisition device based on a plurality of ultra-wideband UWB base stations pre-deployed at designated locations in the building and ultra-wideband UWB tags installed on the image acquisition device includes:

[0015] Acquire base station identifiers of at least four target UWB base stations that receive the transmission signal of the UWB tag;

[0016] Calculate the coordinate information of the image acquisition device in the base station coordinate system according to the received signal strength of each target UWB base station;

[0017] The coordinate information of the image acquisition device in the base station coordinate system is converted into the coordinate information in the building coordinate system to obtain the positioning information of the image acquisition device.

[0018] Further, performing three-dimensional modeling of the area to be updated and / or the structure to be updated according to the image data includes:

[0019] Perform image stitching on each image data according to the image features to obtain target image data of the area to be updated and / or the structure to be updated;

[0020] According to the target image data, three-dimensional modeling is performed on the basis of the building structure corresponding to the original building information model BIM.

[0021] Further, updating the original building information model BIM according to the description information of the area to be updated and / or the structure to be updated includes:

[0022] Convert the description information of the area to be updated and / or the structure to be updated into a data file recognizable by BIM software or a visualization platform;

[0023] The original building information model BIM is updated by modifying a form according to the data file.

[0024] In another aspect, the present invention provides a vision-based building information model (BIM) updating system, the system comprising:

[0025] A path generation module, used for generating an update path according to the area to be updated and / or the structure to be updated in the original building information model BIM;

[0026] A data acquisition module, used to acquire image data acquired by an image acquisition device during movement along the update path in the building corresponding to the building information model and position information of an acquisition area corresponding to each image data, wherein the image data includes a current image of the area to be updated and / or the structure to be updated;

[0027] A three-dimensional modeling module, used to perform three-dimensional modeling of the area to be updated and / or the structure to be updated according to the image data, and determine description information of the area to be updated and / or the structure to be updated, wherein the description information includes position coordinates, three-dimensional size and / or structure type;

[0028] The model updating module is used to update the original building information model BIM according to the description information of the area to be updated and / or the structure to be updated.

[0029] Furthermore, the data acquisition module specifically includes:

[0030] A positioning unit, used for positioning the image acquisition device based on a plurality of ultra-wideband UWB base stations pre-deployed at designated locations in the building and an ultra-wideband UWB tag installed on the image acquisition device;

[0031] The acquisition unit is used to acquire the position information of the acquisition area corresponding to the image data acquired by the image acquisition device according to the positioning information of the image acquisition device.

[0032] Furthermore, the three-dimensional modeling module includes:

[0033] An image stitching unit, used for stitching the image data according to the image features to obtain target image data of the area to be updated and / or the structure to be updated;

[0034] The modeling unit is used to perform three-dimensional modeling on the basis of the building structure corresponding to the original building information model BIM according to the target image data.

[0035] Furthermore, the model updating module includes:

[0036] A format conversion unit, used to convert the description information of the area to be updated and / or the structure to be updated into a data file recognizable by the BIM software or visualization platform;

[0037] The updating unit is used to update the original building information model BIM by modifying a form according to the data file.

[0038] The vision-based building information model (BIM) updating method and system proposed in the present invention can generate an update path for the areas and structure types that need to be updated, without the need to perform global measurement and update each time. Image information of the area to be updated and / or the structure to be updated is obtained based on the update path, and the position coordinates, three-dimensional dimensions and / or structure type of the area to be updated and / or the structure to be updated are determined through three-dimensional modeling, and the original building information model (BIM) is updated accordingly. There is no need to indirectly update the BIM model by updating the drawings, which reduces the workload, reduces the errors caused by drawing import and conversion, and improves efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A flowchart of a vision-based building information model (BIM) updating method of the present invention;

[0040] Figure 2 This is a structural block diagram of the vision-based building information model (BIM) update system of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] For completed buildings, structures such as beams, slabs, columns, and load-bearing walls no longer change. However, in the actual use of the building, objects involved in the operation and maintenance BIM, such as building walls, doors, decorations, and electromechanical equipment, can change, so the building model needs to be updated regularly.

[0043] Please refer to Figure 1As shown, it is a flow chart of a visual-based BIM updating method provided by an embodiment of the present invention. The visual-based BIM updating method provided by an embodiment of the present invention specifically comprises the following steps:

[0044] S11. Generate an update path according to the area to be updated and / or the structure to be updated in the original building information model BIM.

[0045] In the embodiment of the present invention, an update path can be generated based on the existing BIM model of the building. Specifically, by analyzing based on the original BIM model, an update path that can distinguish floors and fully cover the area is generated. The route must include the main update targets, such as the area to be updated and / or the structure to be updated. Generally, the mechanical and electrical equipment parts are mainly inspected and updated. The building wall can also be the main update object, mainly for the renovated building. Therefore, when updating, it is necessary to select the main updated structure class, and then automatically generate the update route according to the selected area and structure to be updated.

[0046] The present invention can design update routes according to the areas and structural types that need to be updated, without the need to perform global measurement and update each time.

[0047] S12, acquiring image data acquired by the image acquisition device during its movement along the update path in the building corresponding to the building information model and location information of the acquisition area corresponding to each image data.

[0048] The image data includes a current image of a region to be updated and / or a structure to be updated.

[0049] S13: Perform three-dimensional modeling on the area to be updated and / or the structure to be updated according to the image data, and determine description information of the area to be updated and / or the structure to be updated.

[0050] Wherein, the description information includes location coordinates, three-dimensional dimensions and / or structure type;

[0051] S14: updating the original building information model BIM according to the description information of the area to be updated and / or the structure to be updated.

[0052] The present invention mainly updates the areas and structures of building walls, doors, decorations, and electromechanical equipment waiting to be updated, and uses the formed building structure parts as a reference. First, it avoids unnecessary updates to the building structure and reduces the probability of errors. At the same time, it realizes the update of components of similar structures such as building walls, doors, decorations, etc. for the first time.

[0053] The vision-based building information model (BIM) updating method proposed in the present invention can generate an update path for the areas and structure types that need to be updated, without the need to perform global measurement and update each time. Image information of the area to be updated and / or the structure to be updated is obtained based on the update path, and the position coordinates, three-dimensional dimensions and / or structure type of the area to be updated and / or the structure to be updated are determined through three-dimensional modeling, and the original building information model (BIM) is updated accordingly. There is no need to indirectly update the BIM model by updating the drawings, which reduces the workload, reduces the errors caused by drawing import and conversion, and improves efficiency and accuracy.

[0054] In the embodiment of the present invention, the step S12 of acquiring the image data acquired by the image acquisition device in the process of moving along the update path in the building corresponding to the building information model and the position information of the acquisition area corresponding to each image data specifically includes: positioning the image acquisition device based on multiple ultra-wideband UWB base stations pre-deployed at designated positions in the building and ultra-wideband UWB tags installed on the image acquisition device; and acquiring the position information of the acquisition area corresponding to the image data acquired by the image acquisition device according to the positioning information of the image acquisition device.

[0055] Among them, based on multiple ultra-wideband UWB base stations pre-deployed at designated positions in the building and ultra-wideband UWB tags installed on the image acquisition device, the image acquisition device is positioned, specifically: the base station identifications of at least four target UWB base stations that receive the transmission signals of the UWB tags are obtained; the coordinate information of the image acquisition device in the base station coordinate system is calculated according to the received signal strength of each target UWB base station; the coordinate information of the image acquisition device in the base station coordinate system is converted into the coordinate information in the building coordinate system to obtain the positioning information of the image acquisition device.

[0056] The present invention obtains the coordinate position, three-dimensional size and type of the measured structure in the building coordinate system through the transformation of the camera coordinate system, the base station coordinate system and the building coordinate system, and describes the structure in a universal way, which is convenient for transformation into various types of BIM models.

[0057] Specifically, the image acquisition device is carried by the update personnel, or automatically moves according to the planned update path. The update personnel use the image acquisition device to take pictures of the building walls, doors, decorations, electromechanical equipment and other components that need to be updated, and locate them through ultra-wideband positioning technology. In this embodiment, the image acquisition device is positioned by the preset UWB base station and the UWB tag on the image acquisition device, so as to determine the corresponding area of ​​the captured image data. The specific arrangement of the UWB base station can be achieved by analyzing the position of the structural part in the existing BIM, arranging the base stations at a certain distance at special positions such as the edges of the columns in the building structure and the edges of the shear walls, and then using a handheld laser rangefinder to measure the position of the base station, determine the building coordinates of each base station in the structural part, thereby realizing the conversion of the UWB tag from the base station coordinate system to the building coordinate system. Among them, at least 4 UWB base stations are arranged on each floor in the building.

[0058] The present invention uses the UWB positioning and path planning method to improve the accuracy and reliability of updates to the greatest extent.

[0059] In the embodiment of the present invention, the three-dimensional modeling of the area to be updated and / or the structure to be updated according to the image data in step S13 specifically includes: stitching the image data according to the image features to obtain the target image data of the area to be updated and / or the structure to be updated; and performing three-dimensional modeling on the building structure corresponding to the original building information model BIM according to the target image data. The image features may include shape and texture features.

[0060] Specifically, in this embodiment, the three-dimensional size and type of the component in the field of view are determined by visual reconstruction. The image acquisition device can be a monocular camera system, a binocular camera system or a multi-eye camera system. In addition to the uwb tag, the image acquisition device is also provided with a gyroscope. The main point position is determined by UWB positioning, and the main axis direction vector is solved by the device's own gyroscope. By shooting and stitching the objects on the path, the three-dimensional modeling is combined with the original building structure in the BIM, and the solution is performed to realize the identification and three-dimensional size measurement of the area to be updated and / or the structure to be updated, such as building walls, doors, decorations, electromechanical equipment and other components.

[0061] In a specific example, when the image acquisition device moves along the path, it takes a set of image data of the objects on the path at a preset interval, preferably 5-10 photos per second, and the captured images are spliced ​​by extracting, matching and fusing feature points of the image data, and the object position in the camera coordinate system is solved by using a feature-based cubic matching algorithm in binocular vision, and then the camera principal point coordinates and the camera principal axis vector in the building coordinate system are measured by UWB positioning, and the object coordinates in the camera coordinate system are converted to the building coordinate system according to the coordinate system transformation method, and the position of the object in the building coordinate system is determined, and the model is established in combination with the original building structure in BIM, and finally, through an artificial intelligence neural network algorithm, using a building equipment item library that has been extracted and trained, the feature points of the target in the image are matched to realize the type recognition of building walls, doors, decorations, electromechanical equipment and other components, and a feature-based cubic matching algorithm is used to perform multiple matches from different angles. After multi-angle matching calculations, the least squares method is used to determine the three-dimensional size of the identified object, and finally the object coordinates, three-dimensional size, and type are determined.

[0062] Furthermore, the present invention can utilize image stitching and three-dimensional reconstruction methods to identify the type and three-dimensional size of an object. The combination of a conventional camera and an infrared camera can more accurately distinguish between partition walls and glass curtain walls, while greatly simplifying the identification of electromechanical equipment.

[0063] In an embodiment of the present invention, updating the original building information model BIM according to the description information of the area to be updated and / or the structure to be updated in step S14 specifically includes: converting the description information of the area to be updated and / or the structure to be updated into a data file recognizable by BIM software or a visualization platform; and updating the original building information model BIM by modifying a form according to the data file.

[0064] In this embodiment, the measured object coordinates, three-dimensional dimensions, type and other descriptive information of the area to be updated and / or the structure to be updated are converted into a data format that can be recognized by the BIM software or visualization platform, and the update of the BIM model is achieved by modifying the form. There is no need to use CAD to update the drawings, and then perform BIM update through the updated drawings.

[0065] In the process of inputting data into the BIM model, the drawing modification step is directly skipped, which not only reduces the workload but also reduces the rounding errors caused by multiple imports and conversions, thereby improving efficiency and reducing errors.

[0066] For the method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0067] Figure 2 The structure diagram of a visual-based building information model (BIM) updating system according to an embodiment of the present invention is schematically shown. Figure 2 The vision-based building information model (BIM) updating system of the embodiment of the present invention specifically includes a path generation module 201, a data acquisition module 202, a three-dimensional modeling module 203 and a model updating module 204, wherein:

[0068] A path generation module 201 is used to generate an update path according to the area to be updated and / or the structure to be updated in the original building information model BIM;

[0069] A data acquisition module 202 is used to acquire image data acquired by the image acquisition device during movement along the update path in the building corresponding to the building information model and position information of the acquisition area corresponding to each image data, wherein the image data includes a current image of the area to be updated and / or the structure to be updated;

[0070] A three-dimensional modeling module 203, configured to perform three-dimensional modeling on the area to be updated and / or the structure to be updated according to the image data, and determine description information of the area to be updated and / or the structure to be updated, wherein the description information includes position coordinates, three-dimensional size and / or structure type;

[0071] The model updating module 204 is used to update the original building information model BIM according to the description information of the area to be updated and / or the structure to be updated.

[0072] In the embodiment of the present invention, the data acquisition module 202 specifically includes a positioning unit and an acquisition unit, wherein:

[0073] A positioning unit, used for positioning the image acquisition device based on a plurality of ultra-wideband UWB base stations pre-deployed at designated locations in the building and an ultra-wideband UWB tag installed on the image acquisition device;

[0074] The acquisition unit is used to acquire the position information of the acquisition area corresponding to the image data acquired by the image acquisition device according to the positioning information of the image acquisition device.

[0075] Furthermore, the positioning unit is specifically used to obtain the base station identifications of at least four target UWB base stations that receive the transmission signal of the UWB tag; calculate the coordinate information of the image acquisition device in the base station coordinate system according to the received signal strength of each target UWB base station; convert the coordinate information of the image acquisition device in the base station coordinate system into the coordinate information in the building coordinate system to obtain the positioning information of the image acquisition device.

[0076] In the embodiment of the present invention, the 3D modeling module 203 specifically includes an image stitching unit and a modeling unit, wherein:

[0077] An image stitching unit, used for stitching the image data according to the image features to obtain target image data of the area to be updated and / or the structure to be updated;

[0078] The modeling unit is used to perform three-dimensional modeling on the basis of the building structure corresponding to the original building information model BIM according to the target image data.

[0079] In the embodiment of the present invention, the model updating module 204 specifically includes a format conversion unit and an updating unit, wherein:

[0080] A format conversion unit, used to convert the description information of the area to be updated and / or the structure to be updated into a data file recognizable by the BIM software or visualization platform;

[0081] The updating unit is used to update the original building information model BIM by modifying a form according to the data file.

[0082] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0083] The vision-based building information model (BIM) updating method and system proposed in the present invention can generate an update path for the areas and structure types that need to be updated, without the need to perform global measurement and update each time. Image information of the area to be updated and / or the structure to be updated is obtained based on the update path, and the position coordinates, three-dimensional dimensions and / or structure type of the area to be updated and / or the structure to be updated are determined through three-dimensional modeling, and the original building information model (BIM) is updated accordingly. There is no need to indirectly update the BIM model by updating the drawings, which reduces the workload, reduces the errors caused by drawing import and conversion, and improves efficiency and accuracy.

[0084] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0085] In addition, those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, any one of the claimed embodiments may be used in any combination.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vision-based building information model (BIM) updating method, characterized in that: The method comprises: Generate an update path according to the area to be updated and the structure to be updated in the original building information model BIM, including: analyze based on the original building information model BIM, generate an update path that can distinguish floors and fully cover the area, select the updated structure class during the update, and automatically generate an update route according to the area and structure selected for update, the update path includes main update targets, and the main update targets include electromechanical equipment parts, building wall parts and / or redecorated building parts; Acquire image data acquired by an image acquisition device during movement along the update path in the building corresponding to the building information model and position information of an acquisition area corresponding to each image data, wherein the image data includes current images of the area to be updated and the structure to be updated; Performing three-dimensional modeling of the area to be updated and the structure to be updated according to the image data, and determining description information of the area to be updated and the structure to be updated, wherein the description information includes position coordinates, three-dimensional size and structure type; The formed building structure part is used as a reference, and the original building information model BIM is updated according to the description information of the area to be updated and the structure to be updated.

2. The method according to claim 1, characterized in that The step of acquiring image data acquired by the image acquisition device during movement along the update path in the building corresponding to the building information model and location information of the acquisition area corresponding to each image data includes: The image acquisition device is positioned based on multiple ultra-wideband UWB base stations pre-deployed at designated locations in the building and ultra-wideband UWB tags installed on the image acquisition device; The position information of the acquisition area corresponding to the image data acquired by the image acquisition device is obtained according to the positioning information of the image acquisition device.

3. The method according to claim 2, characterized in that At least four UWB base stations are deployed on each floor of the building.

4. The method according to claim 2, characterized in that The positioning of the image acquisition device based on multiple ultra-wideband UWB base stations pre-deployed at designated locations in the building and ultra-wideband UWB tags installed on the image acquisition device includes: Acquire base station identifiers of at least four target UWB base stations that receive the transmission signal of the UWB tag; Calculate the coordinate information of the image acquisition device in the base station coordinate system according to the received signal strength of each target UWB base station; The coordinate information of the image acquisition device in the base station coordinate system is converted into the coordinate information in the building coordinate system to obtain the positioning information of the image acquisition device.

5. The method according to claim 1, characterized in that The performing three-dimensional modeling of the area to be updated and the structure to be updated according to the image data comprises: Perform image stitching on each image data according to the image features to obtain target image data of the area to be updated and the structure to be updated; According to the target image data, three-dimensional modeling is performed on the basis of the building structure corresponding to the original building information model BIM.

6. The method according to claim 1, characterized in that The updating of the original building information model BIM according to the description information of the area to be updated and the structure to be updated includes: Convert the description information of the area to be updated and the structure to be updated into a data file recognizable by BIM software or a visualization platform; The original building information model BIM is updated by modifying a form according to the data file.

7. A vision-based building information model (BIM) update system, characterized in that: The system comprises: A path generation module is used to generate an update path according to the area to be updated and the structure to be updated in the original building information model BIM, including: analyzing based on the original building information model BIM, generating an update path that can distinguish floors and fully cover the area, selecting the updated structure class when updating the path, and automatically generating an update route according to the area and structure selected for update, the update path includes main update targets, and the main update targets include electromechanical equipment parts, building wall parts and / or redecorated building parts; A data acquisition module, used to acquire image data acquired by an image acquisition device during movement along the update path in the building corresponding to the building information model and position information of an acquisition area corresponding to each image data, wherein the image data includes current images of the area to be updated and the structure to be updated; A three-dimensional modeling module, used for performing three-dimensional modeling on the area to be updated and the structure to be updated according to the image data, and determining description information of the area to be updated and the structure to be updated, wherein the description information includes position coordinates, three-dimensional size and structure type; The model updating module is used to update the original building information model BIM based on the description information of the area to be updated and the structure to be updated, with reference to the formed building structure part.

8. The system according to claim 7, characterized in that The data acquisition module specifically includes: A positioning unit, used for positioning the image acquisition device based on a plurality of ultra-wideband UWB base stations pre-deployed at designated locations in the building and an ultra-wideband UWB tag installed on the image acquisition device; The acquisition unit is used to acquire the position information of the acquisition area corresponding to the image data acquired by the image acquisition device according to the positioning information of the image acquisition device.

9. The system according to claim 7, characterized in that The three-dimensional modeling module includes: An image stitching unit, used for stitching each image data according to the image features to obtain target image data of the area to be updated and the structure to be updated; The modeling unit is used to perform three-dimensional modeling on the basis of the building structure corresponding to the original building information model BIM according to the target image data.

10. The system according to claim 7, characterized in that The model updating module comprises: A format conversion unit, used to convert the description information of the to-be-updated area and the to-be-updated structure into a data file recognizable by the BIM software or visualization platform; The updating unit is used to update the original building information model BIM by modifying a form according to the data file.

Images