CN114329724A - Building information model BIM updating method and system based on vision - Google Patents
Building information model BIM updating method and system based on vision Download PDFInfo
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Abstract
The invention provides a building information model BIM updating method and system based on vision, wherein the method comprises the following steps: generating an updating path according to an area to be updated and/or a structure to be updated in an original Building Information Model (BIM); acquiring image data acquired by an image acquisition device in the moving process of a building along an updating path and position information of an acquisition area corresponding to the image data, performing three-dimensional modeling on an area to be updated and/or a 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 comprises a position coordinate, a three-dimensional size and/or a structure type; and updating the BIM according to the description information of the area to be updated and/or the structure to be updated. According to the invention, the BIM model is not required to be updated indirectly by a method for updating the drawing, so that the workload is reduced, errors caused by drawing import and conversion are reduced, and the BIM updating efficiency and precision are improved.
Description
Technical Field
The invention relates to the technical field of computer processing, in particular to a building information model BIM updating method and system based on vision.
Background
The existing BIM model updating mainly depends on a technician to measure the existing building through an RTK and a total station, the result is fed back to a design house to reconstruct a CAD drawing, the reconstructed CAD drawing is compared with the original CAD drawing to find out a change position, and the change information and the BIM model are modified in a one-to-one comparison mode.
In the method, three major problems exist, namely positioning link errors, limitation of the number of measurement point positions and incapability of reflecting the updating condition of equipment in a building. The RTK is used for directly measuring the space point coordinates in the building, and the RTK technology can measure in motion, so that coordinates of a large number of data point positions can be quickly and conveniently obtained, the measuring efficiency is effectively improved, but random errors of a self-positioning link of a measuring device are easily introduced through the reconstruction process of absolute coordinates, the measuring result is distorted with the actual result, and the reconstruction effect is influenced. The method is characterized in that a total station is used for measuring relative coordinates of spatial points in a building, after a total station coordinate system and a building coordinate system are transformed and calibrated, errors of a positioning link of a measuring device are effectively eliminated, accurate measurement can be carried out, however, the total station measurement needs to use a measuring ball lens, some high points are inconvenient to measure, tracking effect is easily lost due to object shielding, a plurality of arrangement places are needed, and the conversion relation between the total station coordinate system and the building coordinate system needs to be calibrated again in each arrangement, so that the measuring process is very complex, and the method is only suitable for updating of measurement requirements and construction BIM in the building construction process.
Disclosure of Invention
In view of the above, the present invention has been made to provide a vision-based building information model BIM updating method and system that overcomes or at least partially solves the above-mentioned problems.
In one aspect, the present invention provides a Building Information Model (BIM) updating method based on vision, including:
generating an updating path according to an area to be updated and/or a structure to be updated in an original Building Information Model (BIM);
acquiring image data acquired by image acquisition equipment along the updating path in the moving process of the building corresponding to the building information model and position information of an acquisition area corresponding to each image data, wherein the image data comprises a current image of an area to be updated and/or a structure to be updated;
according to the image data, three-dimensional modeling is carried out on the area to be updated and/or the structure to be updated, and description information of the area to be updated and/or the structure to be updated is determined, wherein the description information comprises position coordinates, three-dimensional size and/or structure type;
and updating the BIM according to the description information of the area to be updated and/or the structure to be updated.
Further, the acquiring image data acquired by the image acquisition device during the 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:
positioning the image acquisition equipment based on a plurality of ultra wide band UWB base stations which are arranged at specified positions in a building in advance and ultra wide band UWB tags which are arranged on the image acquisition equipment;
and acquiring the position information of the acquisition area corresponding to the image data acquired by the image acquisition equipment according to the positioning information of the image acquisition equipment.
Further, at least 4 UWB base stations are arranged in each floor within the building.
Further, the positioning of the image acquisition device based on the plurality of ultra wide band UWB base stations pre-arranged at the designated positions in the building and the ultra wide band UWB tags installed on the image acquisition device comprises:
acquiring base station identifications of at least four target UWB base stations which receive emission signals of the UWB tag;
calculating the coordinate information of the image acquisition equipment in a base station coordinate system according to the received signal strength of each target UWB base station;
and (4) the coordinate information of the image acquisition equipment in the base station coordinate system is converted into the coordinate information in the building coordinate system, so that the positioning information of the image acquisition equipment is obtained.
Further, the three-dimensional modeling of the region to be updated and/or the structure to be updated according to the image data includes:
performing image splicing on each image data according to the image characteristics to obtain target image data of a region to be updated and/or a structure to be updated;
and performing three-dimensional modeling on the basis of the building structure corresponding to the original building information model BIM according to the target image data.
Further, the 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:
converting the description information of the area to be updated and/or the structure to be updated into a data file which can be identified by BIM software or a visualization platform;
and updating the BIM of the original building information model in a form modifying mode according to the data file.
In another aspect, the present invention provides a vision-based building information model BIM updating system, including:
the path generation module is used for generating an updating path according to the area to be updated and/or the structure to be updated in the original building information model BIM;
the data acquisition module is used for acquiring image data acquired by the image acquisition equipment along the updating path in the moving process of the building corresponding to the building information model and position information of an acquisition area corresponding to each image data, and the image data comprises a current image of an area to be updated and/or a structure to be updated;
the three-dimensional modeling module is used for carrying out three-dimensional modeling on 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 comprises position coordinates, three-dimensional size and/or structure type;
and the model updating module is used for updating the BIM according to the description information of the area to be updated and/or the structure to be updated.
Further, the data acquisition module specifically includes:
the positioning unit is used for positioning the image acquisition equipment based on a plurality of ultra-wideband UWB base stations which are arranged at specified positions in a building in advance and ultra-wideband UWB tags which are installed on the image acquisition equipment;
and the acquisition unit is used for acquiring the position information of the acquisition area corresponding to the image data acquired by the image acquisition equipment according to the positioning information of the image acquisition equipment.
Further, the three-dimensional modeling module includes:
the image splicing unit is used for carrying out image splicing on each image data according to the image characteristics to obtain target image data of a region to be updated and/or a structure to be updated;
and the modeling unit is used for carrying out three-dimensional modeling on the basis of the building structure corresponding to the original building information model BIM according to the target image data.
Further, the model update module comprises:
the format conversion unit is used for converting the description information of the area to be updated and/or the structure to be updated into a data file which can be identified by BIM software or a visual platform;
and the updating unit is used for updating the BIM according to the data file in a form modifying manner.
The building information model BIM updating method and system based on vision provided by the invention can generate an updating path aiming at the area and structure type to be updated, global measurement and updating are not needed each time, image information of the area to be updated and/or the structure to be updated is obtained based on the updating path, the position coordinate, three-dimensional size and/or structure type of the area to be updated and/or the structure to be updated are determined through three-dimensional modeling, the original building information model BIM is updated accordingly, BIM model updating is not needed to be indirectly carried out through a method of updating a drawing, the workload is reduced, errors caused by drawing importing and converting are reduced, and the efficiency and the precision are improved.
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FIG. 1 is a flow chart of a vision-based building information model BIM update method of the present invention;
fig. 2 is a block diagram of a BIM updating system of a vision-based building information model according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The structure of the finished building, beam, plate, column, bearing wall and the like is not changed any more. However, in the actual use process of a building, objects involved in operation and maintenance BIMs such as building walls, doors, decorations, electromechanical devices and the like can be changed, so that the building model needs to be updated regularly.
Fig. 1 is a schematic flow chart of a visual-based building information model BIM updating method according to an embodiment of the present invention. The building information model BIM updating method based on vision provided by the embodiment of the invention specifically comprises the following steps:
and S11, generating an updating path according to the area to be updated and/or the structure to be updated in the original building information model BIM.
In the embodiment of the invention, the updating path can be generated according to the existing BIM model of the building. Specifically, through analyzing based on original BIM model, generate and to carry out the floor and distinguish and regional full-covered update route, will include main update target in the route, if wait to update the region and/or wait to update the structure, under general condition, mainly patrol and update electromechanical device part, also can building wall be main renewal object, mainly to the building after finishing again. Therefore, during updating, the main updated structure class needs to be selected, and then an updating route is automatically generated according to the selected area and structure needing to be updated.
The invention can design the updating route aiming at the area and the structure type which need to be updated, and does not need to carry out global measurement and updating every time.
And S12, acquiring image data acquired by the image acquisition equipment during the movement process along the updating 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 comprises a current image of the area to be updated and/or the structure to be updated.
S13, carrying out three-dimensional modeling on the area to be updated and/or the structure to be updated according to the image data, and determining the description information of the area to be updated and/or the structure to be updated.
Wherein the description information comprises position coordinates, three-dimensional size and/or structure type;
and S14, updating the BIM according to the description information of the area to be updated and/or the structure to be updated.
The invention mainly aims at the building wall, the door, the ornament and the electromechanical equipment to wait for the updating of the updating area and the structure, and refers to the formed building structure part, so that firstly, unnecessary updating of the building structure is avoided, the probability of error occurrence is reduced, and meanwhile, the updating of the components with similar structures such as the building wall, the door, the ornament and the like is realized for the first time.
The building information model BIM updating method based on vision provided by the invention can generate an updating path aiming at the area and the structure type which need to be updated, does not need to perform global measurement and updating every time, obtains the image information of the area and/or the structure to be updated based on the updating path, determines the position coordinate, the three-dimensional size and/or the structure type of the area and/or the structure to be updated through three-dimensional modeling, updates the original building information model BIM according to the position coordinate, the three-dimensional size and/or the structure type, does not need to perform BIM model updating indirectly through a method of updating a drawing, reduces the workload, reduces errors caused by drawing importing and converting, and improves the efficiency and the precision.
In this embodiment of the present invention, the acquiring, by the image acquiring device in step S12, image data acquired during the movement of the image acquiring device in the building corresponding to the building information model along the update path and position information of an acquisition area corresponding to each image data specifically includes: positioning the image acquisition equipment based on a plurality of ultra wide band UWB base stations which are arranged at specified positions in a building in advance and ultra wide band UWB tags which are arranged on the image acquisition equipment; and acquiring the position information of the acquisition area corresponding to the image data acquired by the image acquisition equipment according to the positioning information of the image acquisition equipment.
Wherein, based on lay in advance the ultra wide band UWB label of installing on a plurality of ultra wide band UWB basic stations and the image acquisition equipment of assigned position in the building, fix a position image acquisition equipment, specifically do: acquiring base station identifications of at least four target UWB base stations which receive emission signals of the UWB tag; calculating the coordinate information of the image acquisition equipment in a base station coordinate system according to the received signal strength of each target UWB base station; and (4) the coordinate information of the image acquisition equipment in the base station coordinate system is converted into the coordinate information in the building coordinate system, so that the positioning information of the image acquisition equipment is obtained.
According to the invention, the coordinate position, the three-dimensional size and the type of the measured structure in the building coordinate system are obtained through the conversion of the camera coordinate system, the base station coordinate system and the building coordinate system, the structure is described in a general way, and the structure is conveniently converted into various BIM models.
Specifically, image acquisition equipment is carried by the renewal personnel, or removes according to the update route that plans well automatically, and the renewal personnel use image acquisition equipment to shoot building wall, door, embellishment, electromechanical device etc. need the component of renewal, fix a position through ultra wide band location technique. In this embodiment, the image acquisition device is positioned by the preset uwb base station and the uwb label on the image acquisition device, so as to determine the corresponding area of the shot image data. The specific arrangement of the UWB base stations can be realized by analyzing the position of the structural part in the existing bim, arranging the base stations at a certain interval at special positions such as the edges of pillars and the edges of shear walls in the building structure, measuring the positions of the base stations by using a handheld laser range finder, and determining the building coordinates of each base station in the structural part, thereby realizing the conversion of the UWB label from the base station coordinate system to the building coordinate system. Wherein at least 4 UWB base stations are arranged in each floor within the building.
The invention uses UWB positioning and path planning method to improve the updating precision and reliability to the maximum extent.
In this embodiment of the present invention, the three-dimensional modeling, performed on the area to be updated and/or the structure to be updated according to the image data in step S13, specifically includes: performing image splicing on each image data according to the image characteristics to obtain target image data of a region to be updated and/or a structure to be updated; and performing three-dimensional modeling on the basis of 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, among others.
Specifically, in the present embodiment, the three-dimensional size and type of the member in the field of view are determined by means of visual reconstruction. The image capture device may be a monocular camera system, a binocular camera system, or a multi-view camera system. Inside except being provided with the UWB label of image acquisition equipment, still be provided with the gyroscope, fix a position the principal point position through UWB, solve main shaft direction vector with the gyroscope of equipment self, through shooting and image concatenation to the object on the route, building structure in combining original BIM carries out three-dimensional modeling, solve, the realization is waited to update the region and/or is waited to update the structure, like building wall, door, the embellishment, components such as electromechanical device, discernment and three-dimensional size measurement.
In one embodiment, during the process of moving along the path, the image acquisition device takes a set of image data of an object on the path at preset time intervals, preferably 5-10 photos per second, performs image splicing on the taken images by means of feature point extraction, matching and fusion on the image data, uses a feature-based cubic matching algorithm in binocular vision to calculate the position of the object under a camera coordinate system, then measures the coordinates of a principal point of the camera and a principal axis vector of the camera under the building coordinate system through uwb positioning, converts the coordinates of the object under the camera coordinate system into the building coordinate system according to a coordinate system conversion method, determines the position of the object in the building coordinate system, realizes the establishment of a model by combining the building structure in the original BIM, and finally utilizes an extracted and trained building device object library by means of an artificial intelligence neural network algorithm, the method comprises the steps of matching feature points of a target in an image, identifying types of components such as building walls, doors, ornaments and electromechanical equipment, conducting multiple matching from different angles by adopting a feature-based cubic matching algorithm, determining the three-dimensional size of an identified object by using a least square method after multi-angle matching calculation, and finally determining coordinates, the three-dimensional size and the types of the object.
Furthermore, the invention can identify the type and the three-dimensional size of the article by using the image splicing and three-dimensional reconstruction method, can accurately distinguish the partition wall and the glass curtain wall by adopting the combination of the conventional camera and the infrared camera, and simultaneously greatly simplifies the identification of electromechanical equipment.
In this embodiment of the present invention, the updating, according to the description information of the area to be updated and/or the structure to be updated, the original building information model BIM 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 which can be identified by BIM software or a visualization platform; and updating the BIM of the original building information model in a form modifying mode according to the data file.
In this embodiment, the measured description information of the object coordinates, the three-dimensional size, the type, and the like of the area to be updated and/or the structure to be updated is converted into a data format that can be recognized by BIM software or a visualization platform, the BIM model is updated by modifying the form, the drawing is not required to be updated by using CAD, and then the BIM is updated by the updated drawing.
In the process of inputting data into the BIM model, the link of drawing modification is directly skipped, so that the workload is reduced, simultaneously, the rounding errors caused by multiple leading-in and conversion are reduced, the efficiency is improved, and the errors are reduced.
For simplicity of explanation, the method embodiments are described as a series of acts or combinations, but those skilled in the art will appreciate that the embodiments are not limited by the order of acts described, as some steps may occur in other orders or concurrently with other steps in accordance with the embodiments of the invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Fig. 2 schematically shows a structural diagram of a vision-based building information model BIM updating system according to an embodiment of the present invention. Referring to fig. 2, the building information model BIM updating system based on vision in the embodiment of the present invention specifically includes a path generating module 201, a data obtaining module 202, a three-dimensional modeling module 203, and a model updating module 204, where:
a path generating module 201, configured to generate an update path according to an area to be updated and/or a structure to be updated in an original building information model BIM;
a data obtaining module 202, configured to obtain image data collected by an image collecting device in a moving process of a building corresponding to the building information model along the update path and position information of a collection area corresponding to each image data, where the image data includes a current image of an area to be updated and/or a structure to be updated;
the three-dimensional modeling module 203 is 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, where the description information includes a position coordinate, a three-dimensional size, and/or a structure type;
and the model updating module 204 is configured 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.
In the embodiment of the present invention, the data obtaining module 202 specifically includes a positioning unit and an obtaining unit, where:
the positioning unit is used for positioning the image acquisition equipment based on a plurality of ultra-wideband UWB base stations which are arranged at specified positions in a building in advance and ultra-wideband UWB tags which are installed on the image acquisition equipment;
and the acquisition unit is used for acquiring the position information of the acquisition area corresponding to the image data acquired by the image acquisition equipment according to the positioning information of the image acquisition equipment.
Further, the positioning unit is specifically configured to acquire base station identifiers of at least four target UWB base stations that receive the transmission signal of the UWB tag; calculating the coordinate information of the image acquisition equipment in a base station coordinate system according to the received signal strength of each target UWB base station; and (4) the coordinate information of the image acquisition equipment in the base station coordinate system is converted into the coordinate information in the building coordinate system, so that the positioning information of the image acquisition equipment is obtained.
In the embodiment of the present invention, the three-dimensional modeling module 203 specifically includes an image stitching unit and a modeling unit, where:
the image splicing unit is used for carrying out image splicing on each image data according to the image characteristics to obtain target image data of a region to be updated and/or a structure to be updated;
and the modeling unit is used for carrying out three-dimensional modeling on the basis of the building structure corresponding to the original building information model BIM according to the target image data.
In the embodiment of the present invention, the model updating module 204 specifically includes a format conversion unit and an updating unit, where:
the format conversion unit is used for converting the description information of the area to be updated and/or the structure to be updated into a data file which can be identified by BIM software or a visual platform;
and the updating unit is used for updating the BIM according to the data file in a form modifying manner.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The building information model BIM updating method and system based on vision provided by the invention can generate an updating path aiming at the area and structure type to be updated, global measurement and updating are not needed each time, image information of the area to be updated and/or the structure to be updated is obtained based on the updating path, the position coordinate, three-dimensional size and/or structure type of the area to be updated and/or the structure to be updated are determined through three-dimensional modeling, the original building information model BIM is updated accordingly, BIM model updating is not needed to be indirectly carried out through a method of updating a drawing, the workload is reduced, errors caused by drawing importing and converting are reduced, and the efficiency and the precision are improved.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments may be used in any combination.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A vision-based BIM updating method for a building information model is characterized by comprising the following steps:
generating an updating path according to an area to be updated and/or a structure to be updated in an original Building Information Model (BIM);
acquiring image data acquired by image acquisition equipment along the updating path in the moving process of the building corresponding to the building information model and position information of an acquisition area corresponding to each image data, wherein the image data comprises a current image of an area to be updated and/or a structure to be updated;
according to the image data, three-dimensional modeling is carried out on the area to be updated and/or the structure to be updated, and description information of the area to be updated and/or the structure to be updated is determined, wherein the description information comprises position coordinates, three-dimensional size and/or structure type;
and updating the BIM according to the description information of the area to be updated and/or the structure to be updated.
2. The method of claim 1, wherein obtaining image data captured by the image capture device during movement of the image capture device along the update path within the building corresponding to the building information model and location information for each image data corresponding to a capture area comprises:
positioning the image acquisition equipment based on a plurality of ultra wide band UWB base stations which are arranged at specified positions in a building in advance and ultra wide band UWB tags which are arranged on the image acquisition equipment;
and acquiring the position information of the acquisition area corresponding to the image data acquired by the image acquisition equipment according to the positioning information of the image acquisition equipment.
3. A method as claimed in claim 2, characterised in that at least 4 UWB base stations are arranged in each floor within a building.
4. The method of claim 2, wherein locating the image capture device based on a plurality of ultra-wideband UWB base stations pre-deployed at specified locations within the building and an ultra-wideband UWB tag mounted on the image capture device comprises:
acquiring base station identifications of at least four target UWB base stations which receive emission signals of the UWB tag;
calculating the coordinate information of the image acquisition equipment in a base station coordinate system according to the received signal strength of each target UWB base station;
and (4) the coordinate information of the image acquisition equipment in the base station coordinate system is converted into the coordinate information in the building coordinate system, so that the positioning information of the image acquisition equipment is obtained.
5. The method of claim 1, wherein the three-dimensional modeling of the region to be updated and/or the structure to be updated from the image data comprises:
performing image splicing on each image data according to the image characteristics to obtain target image data of a region to be updated and/or a structure to be updated;
and performing three-dimensional modeling on the basis of the building structure corresponding to the original building information model BIM according to the target image data.
6. The method according to claim 1, wherein the updating of the original building information model BIM according to the description information of the area to be updated and/or the structure to be updated comprises:
converting the description information of the area to be updated and/or the structure to be updated into a data file which can be identified by BIM software or a visualization platform;
and updating the BIM of the original building information model in a form modifying mode according to the data file.
7. A vision-based building information model, BIM, update system, the system comprising:
the path generation module is used for generating an updating path according to the area to be updated and/or the structure to be updated in the original building information model BIM;
the data acquisition module is used for acquiring image data acquired by the image acquisition equipment along the updating path in the moving process of the building corresponding to the building information model and position information of an acquisition area corresponding to each image data, and the image data comprises a current image of an area to be updated and/or a structure to be updated;
the three-dimensional modeling module is used for carrying out three-dimensional modeling on 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 comprises position coordinates, three-dimensional size and/or structure type;
and the model updating module is used for updating the BIM according to the description information of the area to be updated and/or the structure to be updated.
8. The system of claim 7, wherein the data acquisition module specifically comprises:
the positioning unit is used for positioning the image acquisition equipment based on a plurality of ultra-wideband UWB base stations which are arranged at specified positions in a building in advance and ultra-wideband UWB tags which are installed on the image acquisition equipment;
and the acquisition unit is used for acquiring the position information of the acquisition area corresponding to the image data acquired by the image acquisition equipment according to the positioning information of the image acquisition equipment.
9. The system of claim 7, wherein the three-dimensional modeling module comprises:
the image splicing unit is used for carrying out image splicing on each image data according to the image characteristics to obtain target image data of a region to be updated and/or a structure to be updated;
and the modeling unit is used for carrying out 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 of claim 7, wherein the model update module comprises:
the format conversion unit is used for converting the description information of the area to be updated and/or the structure to be updated into a data file which can be identified by BIM software or a visual platform;
and the updating unit is used for updating the BIM according to the data file in a form modifying manner.
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