A method for assisting engineering surveying based on a BIM model and an AR system

Abstract

This invention proposes a method for assisting engineering measurement and verification based on BIM models and AR systems. The method includes: establishing a BIM model using BIM software; collaborating the BIM model with an AR system; scanning the real-world scene using the AR system and aligning and overlaying the BIM model with the scene using reference points; generating a 3D image (1.0) of the overlaid BIM model and scene using the AR system; collecting and calibrating the required measurement and verification data using the AR system; generating a 3D image (2.0) of the overlaid BIM model and scene using the AR system; and exporting, transmitting, or saving the 3D image (2.0) and the collected data using the AR system. All of these steps can be completed by a single worker, saving manpower. Furthermore, having a single worker responsible for the entire process ensures a high level of project understanding, operational proficiency, and saves time and effort. The AR system automatically identifies the dimensions, location, and other data of the real-world scene through scanning, ensuring high accuracy. Continuous calibration during the data collection process further guarantees data precision.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of engineering measurement, and particularly relates to a method for assisting engineering measurement based on a BIM model and an AR system. BACKGROUND

[0002] With the development of building engineering towards high quality and high standard, engineering measurement is an indispensable step, which has very important significance for testing whether the building engineering meets the design requirements and relevant standards and whether the building is safe. After building construction, the main structure, masonry construction, plastering engineering, door and window engineering and decoration stage need to be measured. For most projects, the site still relies on manual measurement using measuring rulers, measuring protractors and other measuring tools, and the measurement results are recorded manually by recorders.

[0003] The traditional engineering measurement method needs manual measurement and manual recording, and at least two workers are needed to work. When the structure bay is large, more workers are needed to assist in measurement. The whole engineering measurement process needs multiple workers, the labor cost is high, and the working hours are consumed. Moreover, the data of engineering measurement are collected manually, and large errors are easy to occur.

[0004] Therefore, how to effectively solve the problems of high labor cost caused by too many workers needed for engineering measurement and large errors caused by manual data collection is a technical problem to be solved. SUMMARY

[0005] In view of the deficiencies in the background art, the application provides a method for assisting engineering measurement based on a BIM model and an AR system, which solves the problems of high labor cost caused by too many workers needed for engineering measurement and large errors caused by manual data collection.

[0006] The technical scheme of the application is as follows:

[0007] A method for assisting engineering measurement based on a BIM model and an AR system, comprising the following steps:

[0008] S1: establishing a BIM model through a BIM software;

[0009] S2: coordinating the BIM model and the AR system;

[0010] S3: scanning a real scene through the AR system, and aligning and superimposing the BIM model and the real scene through a reference point;

[0011] S4: generating a 3D model of the superimposed BIM model and real scene by the AR system; Figure 1 .0;

[0012] S5: Collecting and rating the measured data by the AR system, and rating the AR system;

[0013] S6: The AR system generates a 3D graph 2.0 after superimposing the BIM model and the real scene;

[0014] S7: The AR system exports, transmits or saves the 3D graph 2.0 and the collected data.

[0015] The creation of the BIM model, the superposition of the BIM model and the real scene, the collection and rating of the measured data, the generation of the three-dimensional augmented reality view and the data processing can be completed by the same worker, which saves manpower, and the same worker is responsible from the beginning to the end, has a high understanding of the project, is skilled in operation, saves time and effort; the AR system scans the real scene, automatically identifies various data such as the size and position of the real scene, has high accuracy, and continuously rates during the collection process to ensure the accuracy of the data; the present application combines the BIM model and the AR system, the BIM model provides accurate real scene geometric data, the AR system scans the real scene, the AR system superimposes the BIM model into the actual scene, and the worker can easily understand the same points or different points between the real scene and the BIM model, such as the flatness, levelness and perpendicularity of the floor collected by the real scene, which do not coincide with the superimposed BIM model, which proves that there is a problem in the construction of the real scene, and then the AR system collects the required data, which is convenient for subsequent work, and the electronic data collection compared with the manual data collection strengthens the accuracy of the data and improves the collection speed; when the real scene structure is complex, the worker superimposes the BIM model into the actual scene, which can help the worker quickly understand the detailed characteristics of the complex structure, and further improves the construction accuracy and construction efficiency; the construction process is optimized in a digital way, the environmental pollution and resource waste in the construction link are reduced, the green and environmentally friendly construction is improved, the sustainability of the construction is improved, the policy of actively responding to the national and industry promotion and application of digital, Internet of Things, automation and other smart construction technologies is responded, and the digital, intelligent and visual construction mode of the whole process of engineering design, manufacturing and construction is realized.

[0016] Further, the specific steps of S1 are as follows:

[0017] S1.1: Creating a BIM model according to known data;

[0018] S1.2: Analyzing the BIM model;

[0019] S1.3: Optimizing the BIM model.

[0020] Further, the AR system includes a camera module and a sensing module for real scene scanning, a receiving module for receiving the BIM model, a processing module for processing data, and a storage module for storing data.

[0021] Further, the receiving module includes a transmission interface and a wireless network signal receiver, the BIM model is transmitted to the processing module through the transmission interface, or the BIM software and the AR system are interconnected through the wireless network signal receiver. The BIM model is connected with the AR system.

[0022] Further, the specific steps of S5 are as follows:

[0023] S5.1: observing the 3D Figure 1 .0, finding the difference between the BIM model and the real scene after superimposition;

[0024] S5.2: measuring, marking and interacting with the difference through the AR system;

[0025] S5.3: calibrating and analyzing the difference to find the source of the difference;

[0026] S5.4: measuring the difference again to confirm whether the difference exists, if not, ignoring, if so, marking. Through the AR system scanning the real scene, automatically identifying the size, position and other data of the real scene, the accuracy is high, and the data accuracy is ensured by continuous calibration during the collection process.

[0027] Further, the measured quantity data includes the surface flatness of the real scene, the perpendicularity and levelness of the real scene beam column, the squareness of the real scene internal and external corners, and the geometric size of the real scene. After superimposing the BIM model and the real scene, the difference between them can be observed intuitively, the existing problems can be found out quickly and solved in time, which can help the staff quickly understand the detailed features of complex structures, and further improve the accuracy and efficiency of construction.

[0028] Further, the 3D Figure 1 .0 or the 3D figure 2.0 is used to compare the difference between the BIM model and the real scene. The 3D figure generated by superimposing the BIM model and the real scene through the AR system can make the staff understand the same points or different points between the real scene and the BIM model at a glance, such as the flatness, levelness and perpendicularity of the floor collected by the real scene, which do not coincide with the superimposed BIM model, which proves that there is a problem in the construction of the real scene. Through the AR system, the required data is collected, which is convenient for subsequent work, and the accuracy of the data is improved and the speed of collection is improved compared with manual data collection.

[0029] Further, the BIM model is established by SketchUp, Autodesk Revit, Rhino, 3dMax and Maya. These software can all establish accurate BIM models according to the real size.

[0030] Further, the AR system comprises AR software / AR equipment, the BIM model is combined with the AR software or the BIM model is combined with the AR equipment to complete the measured quantity. The AR software and the AR equipment are both provided with a camera module for scanning the real scene, a network module for transmitting data and a storage module for storing data.

[0031] Further, the AR software uses ARkit / ARcore / vuforia / unity3d / easyar, and the AR equipment uses a head-mounted augmented device / visual glasses / handheld monitoring device.

[0032] Specific advantages of the present application include:

[0033] 1. The creation of the BIM model, the superposition of the BIM model and the real scene, the collection of the measured quantity data, the rating, the generation of the 3D graph and the data processing can all be completed by the same staff, saving manpower, and the same staff is responsible from the beginning to the end, has a high understanding of the project, is skilled in operation, saves time and effort;

[0034] 2. The AR system scans the real scene, automatically identifies the size, position and other data of the real scene, has high accuracy, and continuously performs rating during the collection process to ensure the accuracy of the data;

[0035] 3. The present application combines the BIM model with the AR system, the BIM model provides accurate real scene geometric data, the AR system scans the real scene, and the AR system superimposes the BIM model into the actual scene, the staff can easily see the same points or different points between the real scene and the BIM model, for example, the flatness, levelness and perpendicularity of the floor collected by the real scene do not coincide with the superimposed BIM model, which proves that there is a problem in the construction of the real scene, and the AR system collects the required data, which facilitates the subsequent work, and compared with manual data collection, the electronic data collection strengthens the accuracy of the data and improves the collection speed;

[0036] 4. When the real scene structure is complex, the staff superimposes the BIM model into the actual scene, which can help the staff quickly understand the detailed features of the complex structure, further improving the construction accuracy and construction efficiency;

[0037] 5. The construction process is optimized in a digital way, the environmental pollution and resource waste in the construction link are reduced, the green and environmentally-friendly construction is improved, the sustainability of the construction is improved, the policy of promoting the application of digitalization, Internet of Things and automation in the construction technology is actively responded, and the digitalization, intelligentization and visualization of the whole process of engineering design, manufacturing and construction are realized. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0039] Figure 1 A schematic diagram of a method for assisting engineering measurement based on a BIM model and an AR system. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.

[0041] A method for assisting engineering measurement based on a BIM model and an AR system, comprising the following steps:

[0042] S1: establishing a BIM model through a BIM software;

[0043] S2: coordinating the BIM model with an AR system;

[0044] S3: scanning a real scene through the AR system, and aligning and superimposing the BIM model on the real scene through a reference point;

[0045] S4: generating a 3D map 2.0 of the superimposed BIM model and real scene by the AR system; Figure 1 .0;

[0046] S5: collecting and rating the data to be measured through the AR system, and rating the AR system;

[0047] S6: generating a 3D map 2.0 of the superimposed BIM model and real scene by the AR system;

[0048] S7: exporting, transmitting or saving the 3D map 2.0 and the collected data by the AR system.

[0049] The use of BIM model in the application: prediction and optimization of structure, verification and correction of measured data by using basic information; positioning and navigation of structure, convenient for measurement personnel to quickly and accurately find the structure members to be measured according to the position information provided by the model; size and shape measurement of structure, calibration and verification of measured data by using BIM model to ensure the accuracy and consistency of measured data; visualization of structure, making the obtained measured data more intuitive and easy to understand, and facilitating the discovery of potential problems and hidden dangers.

[0050] The use of AR system in the application: the technology of calculating the position and angle of camera image and adding corresponding image, video and 3D model in real time, the goal of which is to put the virtual world on the real world on the screen and interact in real time. AR system superimposes the structure information in BIM model to the actual scene, so that the workers can view the size, shape, material and other attribute information of the structure in real time; the navigation function of AR system guides the operators to correctly position and measure the members; AR system provides measurement and labeling functions, so that the operators can directly measure and label in the actual scene; the virtual data window of AR system displays the data of structure measured data in real time, and the numerical value and chart information of measured data are displayed in real time.

[0051] The creation of the BIM model, the superposition of the BIM model and the real scene, the collection of the measured data, the calibration, the generation of the three-dimensional augmented reality view and the data processing can be completed by the same staff, manpower is saved, and the same staff is responsible from the beginning to the end, the understanding degree of the project is high, the operation is skilled, time and labor are saved; the size, position and other data of the real scene are automatically recognized by scanning the real scene through the AR system, the accuracy is high, and the calibration is continuously carried out in the collection process, so that the accuracy of the data is ensured; the BIM model and the AR system are combined, the BIM model provides accurate real scene geometric data, the AR system scans the real scene, the AR system superimposes the BIM model into the actual scene, and the staff can intuitively understand the same points or different points between the real scene and the BIM model, for example, the flatness, the levelness and the perpendicularity of the floor collected by the real scene do not coincide with the superimposed BIM model, so that it is proved that there is a problem in the construction of the real scene, and the data required by the AR system is collected, so that the subsequent work is facilitated, compared with manual data collection, the accuracy of the data is improved, and the collection speed is improved; when the real scene structure is complex, the staff superimposes the BIM model into the actual scene, which can help the staff to quickly understand the detailed characteristics of the complex structure, and further improve the construction accuracy and construction efficiency; the construction process is optimized in a digital way, the environmental pollution and resource waste in the construction link are reduced, the green and environment-friendly construction is improved, the sustainability of the construction is improved, the policy of promoting and applying digitalization, Internet of Things and automation and other intelligent construction technologies is actively responded, and the digitalization, intelligentization and visualization of the whole process of engineering design, manufacturing and construction are realized.

[0052] On the basis of the above-mentioned embodiments, as a preferred embodiment, the specific steps of S1 are as follows:

[0053] S1.1: creating a BIM model according to known data; first, data and materials related to the real scene need to be collected, which are not limited to construction drawings, engineering specifications and existing measurement data, etc., and the drawings should include basic information of the real scene, such as the size, position and connection mode of each component in the real scene; second, a height system is established in the BIM software, and the column, beam, plate, wall and other structural components in the BIM model and the detailed components such as embedded parts and reserved holes are accurately established according to the information of the real scene in the construction drawings.

[0054] S1.2: analyzing the BIM model; the existing data is compared with the BIM model by the drawing personnel, the differences between the BIM model and the existing data are found out in time, and it is determined whether the deviation is in the existing data or in the BIM model.

[0055] S1.3: Optimize the BIM model; communicate and collaborate with the design team and other engineering disciplines. If there are discrepancies in the BIM model, it can be optimized and corrected based on existing data to ensure the accuracy and reliability of the model, avoiding additional costs and delays in the later construction or operation stage. The optimization of the BIM model includes the accuracy of the geometric information such as the shape, size, position, relative relationship between different components, floor and space layout, etc.; the integrity of physical information such as material properties, component properties, space configuration and mechanical and electrical equipment; the rationality of rule information such as laws and regulations, project requirements, material and component provisions, design constraints and limitations, etc.

[0056] Specifically, it should be noted that the geometric shape, elevation, angle, size, position and other information of the model should be accurate and correct, and the component accuracy should meet the actual demand; the structure, pipeline, equipment and other information of the building should be clearly expressed in the model; the model should be able to use on different software and platforms, stable and smooth running.

[0057] On the basis of the above embodiment, as a preferred embodiment, the AR system comprises a camera module and a sensor module for real scene scanning, a receiving module for receiving the BIM model, a processing module for processing data, and a storage module for storing data.

[0058] On the basis of the above embodiment, as a preferred embodiment, the receiving module comprises a transmission interface and a wireless network signal receiver, the BIM model is transmitted to the processing module through the transmission interface, or the BIM software and the AR system are interconnected through the wireless network signal receiver.

[0059] On the basis of the above embodiment, as a preferred embodiment, the specific steps of S5 are as follows:

[0060] S5.1: Observe the 3D Figure 1 .0, find out the differences between the BIM model and the real scene after superimposition;

[0061] S5.2: Measure / mark / interact with the differences through the AR system; according to the captured features, create marks using AR devices / AR software, which can be text, images or other forms of marks, used to describe or identify different parts of the structure; add interactive elements such as buttons, links or dynamic effects, etc. to trigger other operations or provide more detailed information, and use gestures or controllers such as clicking or swiping on the screen with fingers to select or move the annotation points, draw lines and polygons and other shapes to interact with the AR devices / AR software.

[0062] S5.3: calibrate, analyze the difference; calibration includes adjustment of the positioning, rotation, scale and internal parameters of the device to ensure that the device can accurately capture and measure scene data; verification is performed by comparing with calibration objects or standard measuring instruments with known size and position to verify the accuracy of the measurement results of the device. Error analysis can compare the differences between the model and the measured data, and find out the causes of the errors. According to the results of error analysis, the parameters of the model are corrected or the calculation method of the measured data is adjusted. The accuracy of the data can be verified by comparing with other independent measurement methods or known data. The model and the measured data are consistent, and the consistency of the model and the measured data is good. The size, position and other data of the real scene are automatically recognized by scanning the real scene through the AR system, which has high accuracy and continuously calibrates during the collection process to ensure the accuracy of the data.

[0063] S5.4: measure the difference again to confirm whether the difference exists. If there is no difference, ignore it. If the difference exists, make a mark. Specifically, the mark is used to mark the position and size of the key point in the AR system and is clear and obvious. The mark should accurately reflect the position and size of the key construction node, the position of the mark should be accurate and should be consistent with the actual construction site; the mark should have stability and be able to be used in different environmental conditions, the mark should be obvious enough and not be disturbed by external factors; the mark should be clear and readable and be able to be used at different times and angles; the mark should have sufficient contrast and brightness to facilitate identification and reading.

[0064] On the basis of the above-mentioned embodiments, as a preferred embodiment, the measured quantity data includes the surface flatness of the real scene, the perpendicularity and horizontality of the real scene beam column, the squareness of the real scene internal and external corners, and the geometric size of the real scene. The BIM model is combined with the AR system, the BIM model provides accurate geometric data of the real scene, the AR system scans the real scene, and the AR system superimposes the BIM model into the actual scene, the staff can easily find the same points or different points between the real scene and the BIM model, such as the flatness, horizontality and perpendicularity of the floor collected by the real scene do not coincide with the superimposed BIM model, which proves that there is a problem in the construction of the real scene, and then the required data is collected through the AR system, which is convenient for subsequent work. Compared with manual data collection, electronic data collection can improve the accuracy of data and improve the speed of collection.

[0065] On the basis of the above-mentioned embodiments, as a preferred embodiment, the 3D Figure 10、The 3D graph 2.0 is used to compare the differences between the BIM model and the real scene. For example, whether the surface of the real scene is flat, whether the real scene beam column is vertical and horizontal construction, whether the real scene internal and external corners are square, and whether the geometric size of the real scene is consistent with the established BIM model. The 3D graph is a view that combines BIM model and AR system to superimpose virtual three-dimensional content into the real world, which can provide detailed design parameters and structural information of the component, and integrate these information with real-time spatial information and image data of the AR device. Users can see and interact with virtual objects in the real environment, further enhancing the understanding of virtual objects. Workers can observe the comparison between BIM model and real scene, intuitively understand the structure, and more accurately judge the state of the structure, improving the accuracy and safety of work.

[0066] On the basis of the above-mentioned embodiments, as a preferred embodiment, the BIM model is established by SketchUp / Autodesk Revit / Rhino / 3dMax / Maya.

[0067] On the basis of the above-mentioned embodiments, as a preferred embodiment, the AR system includes AR software / AR device, and the BIM model is combined with the AR software or the BIM model is combined with the AR device to complete the measurement. The AR software and the AR device are both provided with a camera module and a sensor module for real scene scanning, a network module for data transmission, and a storage module for data storage. Either one combined with the BIM model can complete the measurement.

[0068] On the basis of the above-mentioned embodiments, as a preferred embodiment, the AR software uses ARkit / ARcore / vuforia / unity3d / easyar, and the AR device uses head-mounted augmented device / visual glasses / handheld monitoring device.

[0069] The creation of the BIM model, the superposition of the BIM model and the real scene, the collection of the measured data, the calibration, the generation of the three-dimensional augmented reality view, and the data processing can be completed by the same staff, saving manpower, and the same staff is responsible from the beginning to the end, the understanding degree of the project is high, the operation is skilled, time and labor are saved; the size, position and other data of the real scene are automatically recognized by scanning the real scene through the AR system, the accuracy is high, and the calibration is continuously carried out in the collection process, so that the accuracy of the data is ensured; the BIM model and the AR system are combined, the BIM model provides accurate real scene geometric data, the AR system scans the real scene, the AR system superimposes the BIM model into the actual scene, and the staff can intuitively understand the same points or different points between the real scene and the BIM model, for example, the flatness, the levelness and the perpendicularity of the floor collected by the real scene do not coincide with the superimposed BIM model, so that it is proved that there is a problem in the construction of the real scene, and the data required by the AR system is collected, so that the subsequent work is facilitated, and compared with manual data collection, the accuracy of the data is improved, and the collection speed is improved; when the real scene structure is complex, the staff superimposes the BIM model into the actual scene, which can help the staff to quickly understand the detailed characteristics of the complex structure, and further improve the construction accuracy and construction efficiency; the construction process is optimized in a digital way, the environmental pollution and resource waste in the construction link are reduced, the green and environment-friendly construction is improved, the sustainability of the construction is improved, the policy of actively responding to the national and industry popularization and application of digitalization, Internet of Things, automation and other intelligent construction technologies is responded, and the digitalization, intelligentization and visualization construction mode of the whole process of engineering design, manufacturing and construction is realized.

[0070] The combination of the BIM model and the AR system is very limited and not very intuitive for engineering industry practitioners. The BIM model not only adds a large amount of information data to the building model, but also can be expressed in a three-dimensional intuitive form. With the aid of the AR system, the designers and construction personnel can communicate in time and develop more appropriate design and construction schemes in the early construction stage. In the construction process, the problems in the construction can be quickly found out through the rapid comparison between the visual virtual model and the actual model, and timely changes and repairs can be made to avoid the enlargement and delay of errors, so that great guidance can be provided for the construction.

[0071] The details of the application are well known to those skilled in the art.

[0072] The above shows and describes the basic principles, main features and beneficial effects of the application. The above is only a preferred embodiment of the application and is not intended to limit the application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the application shall be included in the protection scope of the application.

Claims

1. A method for assisting engineering survey based on a BIM model and an AR system, characterized in that: The method comprises the following steps: S1: establishing a BIM model through a BIM software; S2: coordinating the BIM model with an AR system; S3: scanning a real scene through the AR system, and aligning and superimposing the BIM model on the real scene through a reference point; S4: generating a 3D graph 1.0 after superimposing the BIM model on the real scene by the AR system; S5: collecting and calibrating real measurement data through the AR system, and synchronously calibrating the AR system; The specific steps of S5 are as follows: S5.1: observing the 3D graph 1.0 to find out differences generated after superimposing the BIM model on the real scene; S5.2: measuring, marking and interacting with the differences through the AR system; S5.3: calibrating and analyzing the differences to find out the source of the differences; S5.4: measuring the differences again to confirm whether the differences exist, and if not, ignoring, and if so, marking; The real measurement data comprises surface flatness of the real scene, perpendicularity and levelness of real scene beams and columns, squareness of real scene internal and external corners, and geometric dimensions of the real scene; S6: generating a 3D graph 2.0 after superimposing the BIM model on the real scene by the AR system; S7: exporting, transmitting or saving the 3D graph 2.0 and the collected data by the AR system.

2. The method for assisting engineering surveying based on BIM model and AR system according to claim 1, characterized in that: The specific steps of S1 are as follows: S1.1: creating a BIM model according to known data; S1.2: analyzing the BIM model; S1.3: optimizing the BIM model.

3. The method for assisting engineering surveying based on BIM model and AR system according to claim 1, characterized in that: The AR system comprises a camera module and a sensor module for scanning the real scene, a receiving module for receiving the BIM model, a processing module for processing data, and a storage module for storing data.

4. The method for assisting engineering surveying based on BIM model and AR system according to claim 3, characterized in that: The receiving module comprises a transmission interface and a wireless network signal receiver, the BIM model is transmitted to the processing module through the transmission interface, or the BIM software and the AR system are interconnected through the wireless network signal receiver.

5. The method of claim 4, wherein: The 3D graph 1.0 and the 3D graph 2.0 are used to compare the differences between the BIM model and the real scene.

6. The method of assisting engineering field measurement based on a BIM model and an AR system according to any one of claims 1-5, characterized in that: The BIM model is established by SketchUp / Autodesk Revit / Rhino / 3dMax / Maya.

7. The method of assisting engineering surveying based on BIM model and AR system according to any one of claims 1-5, characterized in that: The AR system comprises AR software / AR equipment, and the BIM model is combined with the AR software or the BIM model is combined with the AR equipment to complete real measurement.

8. The method of claim 7, wherein: The AR software uses ARkit / ARcore / vuforia / unity3d / easyar, and the AR equipment uses a head-mounted augmented reality device / visual glasses / handheld monitoring equipment.

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