A method, device, electronic device and storage medium for detecting key dimensions of large prefabricated components

Abstract

The present application discloses a method, device, electronic device and storage medium for detecting key dimensions of large prefabricated components, the method comprising the following steps: S1, constructing a BIM model of prefabricated components based on BIM technology; S2, in the factory processing stage, constructing a millimeter-level point cloud model of prefabricated components according to the BIM model of prefabricated components, drones and three-dimensional laser scanners to perform prefabricated component inspection and key dimension accuracy detection; S3, in the on-site installation stage, constructing an overall centimeter-level and millimeter-level prefabricated component construction site large-scene real-life three-dimensional model and a BIM+GIS fusion platform through drones and three-dimensional laser scanners to achieve automatic detection of key dimension accuracy during the on-site installation stage, ensuring compliance with acceptance specifications. The present application improves the efficiency and accuracy of large-scale workpiece detection by complementing the advantages of BIM, drone aerial survey technology and three-dimensional laser scanning technology, and prevents prefabricated components from being returned to the factory for the second time and low positioning accuracy during on-site installation.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated component detection, and in particular to a method, device, electronic equipment and storage medium for detecting key dimensions of a large prefabricated component. Background Art

[0002] At present, intelligent construction technology has been widely used in prefabricated construction systems, and informatization and intelligence have been widely promoted, which has put forward higher requirements for the standardization and refinement of a large number of prefabricated components. It is required that each prefabricated component can be produced and processed strictly according to the design. The task of detecting the accuracy of prefabricated components is becoming more and more complicated. The current problems include:

[0003] 1. Prefabricated components have very high requirements for positioning accuracy before leaving the factory and during installation. At present, the engineering measurement of prefabricated components is mainly completed by manual detection and analysis using conventional methods (using tape measures, rulers and other contact measurement tools). Traditional technology is difficult to meet the current intelligent popularization. This limitation directly leads to long measurement time and low efficiency of prefabricated components, and it is impossible to ensure that the accuracy of the detection meets the requirements of relevant acceptance specifications;

[0004] 2. During the on-site installation stage, the suspended prefabricated components have certain high-altitude detection risks. Using traditional manual inspection or setting up a millimeter-level 3D laser scanner for collection, it is inconvenient to collect the top of the prefabricated components and there are certain high-altitude hidden dangers, which is not suitable for manual inspection; using a 3D laser scanner, as the height increases, the collection accuracy will also decrease, making it difficult to ensure the accuracy detection requirements and the integrity of the prefabricated components. Summary of the invention

[0005] On the one hand, the present application provides a method for detecting key dimensions of large prefabricated components to solve the technical problems of existing prefabricated component detection, such as long time, low efficiency, lack of accuracy, and potential safety hazards.

[0006] This application is implemented through the following scheme:

[0007] A method for detecting key dimensions of a large prefabricated component comprises the following steps:

[0008] S1. Construct a BIM model of prefabricated components based on building information modeling technology, and conduct collision inspection and in-depth analysis, three-dimensional visualization, actuarial calculation and statistics of engineering quantities, and in-depth design to control construction cost on the internal detailed structure of the BIM model of prefabricated components;

[0009] S2. During the factory processing stage, the BIM model of prefabricated components is used to guide the factory's material cutting and processing, and a millimeter-level point cloud model of prefabricated components is constructed by scanning key dimensions with a 3D laser scanner and collecting photos from a drone at low altitude and close range. The prefabricated components are automatically inspected and the key dimension accuracy is tested based on the BIM model of the prefabricated components to ensure that the accuracy of the components before leaving the factory meets the acceptance specification requirements;

[0010] S3. During the installation stage at the construction site, the construction site and surrounding environment are surveyed and collected by drone-mounted aerial survey equipment to establish a centimeter-level real-life 3D model. The drone is used to collect photos at low altitude and close range, and a 3D laser scanner is used to scan the bottom. Together, a complete set of centimeter-level and millimeter-level real-life 3D models of the construction site are constructed. Multi-source data integration and fusion with the BIM model of the prefabricated components are carried out on the GIS software platform to obtain a BIM+GIS fusion platform. The BIM+GIS fusion platform is used to realize automatic detection of key dimensional accuracy during the on-site installation stage to ensure compliance with relevant acceptance specifications for prefabricated components.

[0011] The step S3 specifically comprises the following steps:

[0012] S31. Establishment of the overall centimeter-level prefabricated component millimeter-level real-scene 3D model: The construction site and the surrounding environment are surveyed and collected by drone with an aerial survey device to establish a centimeter-level real-scene 3D model. The prefabricated components hoisted on site are combined with low-altitude and close-up photos collected by drones and the bottom scanned by a 3D laser scanner to build a model, and the overall centimeter-level and millimeter-level real-scene 3D model of the prefabricated components is constructed;

[0013] S32. Build a BIM+GIS fusion platform: integrate and fuse multi-source data of the prefabricated component BIM model with the construction site geographic location and the overall centimeter-level and millimeter-level real-life 3D model of the prefabricated component on the GIS software platform to obtain a BIM+GIS fusion platform, so that the prefabricated component BIM model has on-site geographic information;

[0014] S33. Detection of key dimensions after installation of prefabricated components: Taking advantage of the secondary development of the GIS software platform, the key dimension information data of two points with the same name corresponding to the BIM model of the prefabricated component and the real-life 3D model of the whole centimeter level and the millimeter level of the prefabricated component are automatically extracted in the BIM+GIS fusion platform for comparison, and the position deviation value between the two points with the same name is calculated, and an accuracy report is generated to guide on-site adjustment of components and acceptance;

[0015] When the multi-source data integration and fusion is performed in step S32, the specific steps include:

[0016] S321, setting the project coordinates of the prefabricated component BIM model, and placing the construction site geographic coordinate system file and the prefabricated component BIM model in the same folder to preliminarily align the two models;

[0017] S322, use the seven-parameter mathematical model to perform model precise registration, and the target coordinates before conversion are , the original coordinates after conversion are ; Among them, the plane parameters are , the rotation parameter is , the scale parameter is , then the seven-parameter mathematical model is:

[0018] ,

[0019] Take at least 3 groups of points with the same name and find the original coordinates of the construction site , and accurately align the model; the BIM model of the prefabricated component has on-site geographic information, which is convenient for management personnel and construction operations to analyze the layout of the crane, eliminate safety hazards on site, and obtain geographic information as needed to guide on-site lifting.

[0020] Furthermore, the step S1 specifically includes the steps of:

[0021] S11. Establishing a BIM model of prefabricated components: using BIM modeling software to build a BIM model of prefabricated components based on design drawings and design requirements, clarifying the internal detailed structure modeling, refining the external overall linear modeling, and setting component detailed information and corresponding materials, and truly visually restoring the overall linear model of the prefabricated components. The modeling accuracy of the BIM model of the prefabricated components is at least LOD500 level;

[0022] S12. Collision check and in-depth analysis of BIM model of prefabricated components: Use the collision check function of BIM modeling software to conduct in-depth analysis including internal detailed structure and hidden component positioning to determine whether it meets the requirements of relevant design specifications. If not, make changes, adjustments and optimizations to the design to ensure the overall reliability of the prefabricated component design;

[0023] S13. Control construction cost based on BIM model of prefabricated components: Use BIM modeling software to calculate the overall project cost of prefabricated components, clarify the overall project volume and control the construction cost in a timely manner, ensure that the construction cost is controllable in advance, and guide the factory to cut materials and process.

[0024] Furthermore, in step S13, using BIM modeling software to calculate the overall project cost of prefabricated components specifically includes the following steps:

[0025] S131. Use BIM modeling software to calculate the engineering quantity v of each sub-item of prefabricated components;

[0026] S132. Calculate the overall project cost c based on the market comprehensive unit price p corresponding to each sub-item engineering quantity v:

[0027] c=v×p.

[0028] Furthermore, the step S2 specifically includes the steps of:

[0029] S21. Deepen the design and guide the factory processing: import the BIM model of prefabricated components and the detailed components, complex segment engineering quantities and construction costs calculated by BIM modeling software into the factory to guide the factory cutting and processing, and strictly control the quality and size of each prefabricated component produced and processed by the factory;

[0030] S22. Modeling by combining drone aerial survey and 3D laser scanner: After the prefabricated components are processed, a three-dimensional laser scanner with multiple stations is used to collect and model the key dimensions and key parts of the prefabricated components without blind spots. The drone is used for low-altitude and close-up supplementary shooting, and aerial photos are combined with the point cloud scanned by the three-dimensional laser scanner to build a millimeter-level point cloud model.

[0031] S23. Key dimension detection of prefabricated components before leaving the factory: Import the BIM model of prefabricated components and the millimeter-level point cloud model into the BIM modeling software, pick up the center overlap of the BIM model of prefabricated components and the millimeter-level point cloud model, automatically extract the key dimension information data of the two corresponding points of the same name on the BIM model of prefabricated components and the millimeter-level point cloud model for comparison, calculate the position deviation value between the two points of the same name, and generate an accuracy report to guide the prefabrication factory's factory acceptance, to ensure that large workpieces meet the acceptance specifications before leaving the factory, to avoid returning to the factory for rework.

[0032] Furthermore, the step S2 further comprises the steps of:

[0033] S24. Factory management of prefabricated components: Generate a QR code that can be pasted on a conspicuous position of the prefabricated component based on the name, size, material, key dimension inspection report and component installation location of the prefabricated component that meets the acceptance specifications. On-site management personnel and installation workers can directly scan the QR code information to view the basic information of the prefabricated component at any time and guide on-site construction operations.

[0034] On the other hand, the present application also provides a device for detecting key dimensions of large prefabricated components, which adopts the above-mentioned method for detecting key dimensions of large prefabricated components, and comprises:

[0035] Prefabricated component BIM model building module, which is used to build the prefabricated component BIM model based on the building information model technology, and to carry out collision inspection and in-depth analysis, three-dimensional visualization, engineering quantity calculation and in-depth design to control the cost of the internal detailed structure of the prefabricated component BIM model;

[0036] The processing stage inspection module is used to guide the factory cutting and processing according to the BIM model of prefabricated components during the factory processing stage, and use 3D laser scanners to scan key dimensions and drones to collect photos at low altitude and close range to build a millimeter-level point cloud model of prefabricated components. Based on the BIM model of prefabricated components, the prefabricated components are automatically inspected and the key dimension accuracy is detected to ensure that the accuracy of the components before leaving the factory meets the acceptance specifications.

[0037] The installation phase detection module is used to establish a centimeter-level real-life 3D model of the construction site and its surrounding environment through aerial survey collection by drone-mounted aerial survey equipment during the installation phase on the construction site. The drone is used to collect photos at low altitude and close range, and a 3D laser scanner is used to scan the bottom. Together, a complete set of centimeter-level and millimeter-level real-life 3D models of the construction site are constructed. Multi-source data is integrated and fused with the BIM model of the prefabricated components on the GIS software platform to obtain the BIM+GIS fusion platform. The BIM+GIS fusion platform is used to realize automatic detection of key dimensional accuracy during the on-site installation phase to ensure compliance with relevant acceptance specifications for prefabricated components.

[0038] On the other hand, the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for detecting critical dimensions of large prefabricated components when executing the computer program.

[0039] On the other hand, the present application further provides a storage medium, which includes a stored program, and when the program is run, controls the device where the storage medium is located to execute the steps of the large prefabricated component key dimension detection method.

[0040] On the other hand, the present application further provides a computer program product, including a computer program or computer executable instructions, which, when executed by a processor, implement the steps of the method for detecting critical dimensions of large prefabricated components.

[0041] Compared with the prior art, this application has the following beneficial effects:

[0042] This application combines BIM technology with drone aerial survey technology and three-dimensional laser scanning technology, making the detection of prefabricated components from traditional to intelligent and improving the detection accuracy and efficiency; this application uses BIM technology to deal with and solve the internal detailed structure of prefabricated components and the collision problems of hidden components in advance, and pre-understands the complex segment structure through visualization, and imports the automatically calculated engineering quantity into the factory for processing and controls the cost and improves the standardization of prefabricated components; this application adopts three-dimensional laser scanning technology and drone aerial survey technology, and the two are used for complementary modeling to improve the accuracy of the model, and to check and detect the key dimensions of prefabricated components, improve the standardization of the linear accuracy of prefabricated components, reduce the risk of detection of high-altitude operations during hoisting, and realize the intelligent key dimension accuracy detection of completion acceptance by building a BIM+GIS fusion platform. This application is suitable for the overall linear accuracy detection of key dimensions of prefabricated components before they leave the factory, so as to avoid unqualified prefabricated components and return to the factory for rework; and accurately control the on-site installation positioning, adjustment and key dimension detection, avoid high-altitude operations and subsequent construction problems, improve the quality detection of large workpieces, and provide in-depth analysis and construction progress control for construction management personnel. This application constructs a BIM model through the building information model (BIM) technology, and uses drone aerial survey technology and 3D laser scanners to construct a point cloud model and a centimeter-level prefabricated component millimeter-level real-life 3D model. It effectively improves the factory processing accuracy detection of prefabricated workpieces and the accuracy detection of installation and positioning at the construction site to solve the defects of traditional detection methods that are difficult to meet on-site detection, and makes the overall construction process of prefabricated components knowable, measurable and controllable, ensuring that pre-shipment detection and construction installation and positioning detection meet the requirements of relevant acceptance specifications, avoiding secondary return to the factory or difficult rework on site, thereby improving the production accuracy of prefabricated components, improving quality and efficiency, and shortening construction period.

[0043] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application:

[0045] Figure 1 This is a flow chart of a method for detecting key dimensions of a large prefabricated component according to a preferred embodiment of the present application;

[0046] Figure 2 It is a schematic diagram of the sub-step flow of step S1 of the preferred embodiment of the present application;

[0047] Figure 3 It is a schematic diagram of the sub-step flow of step S13 of the preferred embodiment of the present application;

[0048] Figure 4 It is a schematic diagram of the sub-step flow of step S2 of the preferred embodiment of the present application;

[0049] Figure 5 is a schematic flow chart of sub-steps of step S2 of another preferred embodiment of the present application;

[0050] Figure 6 It is a schematic diagram of the sub-step flow of step S3 of the preferred embodiment of the present application;

[0051] Figure 7 It is a schematic diagram of a seven-parameter mathematical model of a preferred embodiment of the present application;

[0052] Figure 8 This is a schematic diagram of a module of a device for detecting key dimensions of a large prefabricated component according to a preferred embodiment of the present application;

[0053] Fig. 9 is a schematic block diagram of an electronic device entity in a preferred embodiment of the present application;

[0054] Fig.10 It is a diagram of the internal structure of a computer device of a preferred embodiment of the present application. DETAILED DESCRIPTION

[0055] The embodiments of the present application are described in detail below in conjunction with the accompanying drawings, but the present application can be implemented in a variety of different ways defined and covered below.

[0056] like Figure 1 As shown, the preferred embodiment of the present application provides a method for detecting key dimensions of a large prefabricated component, comprising the steps of:

[0057] S1. Construct a BIM model of prefabricated components based on building information modeling technology, and conduct collision inspection and in-depth analysis, three-dimensional visualization, actuarial calculation and statistics of engineering quantities, and in-depth design to control construction cost on the internal detailed structure of the BIM model of prefabricated components;

[0058] S2. During the factory processing stage, the BIM model of prefabricated components is used to guide the factory's material cutting and processing, and a millimeter-level point cloud model of prefabricated components is constructed by scanning key dimensions with a 3D laser scanner and collecting photos from a drone at low altitude and close range. The prefabricated components are automatically inspected and the key dimension accuracy is tested based on the BIM model of the prefabricated components to ensure that the accuracy of the components before leaving the factory meets the acceptance specification requirements;

[0059] S3. During the installation phase at the construction site, the construction site and surrounding environment are surveyed and collected by drone-mounted aerial survey equipment to establish a centimeter-level real-life 3D model. The drone is used to collect photos at low altitude and close range, and a 3D laser scanner is used to scan the bottom. Together, a complete set of centimeter-level and millimeter-level real-life 3D models of the construction site are constructed. Multi-source data is integrated and fused with the BIM model of the prefabricated components on the GIS software platform to obtain a BIM+GIS fusion platform. The BIM+GIS fusion platform is used to automatically detect the accuracy of key dimensions during the on-site installation phase to ensure compliance with relevant acceptance specifications for prefabricated components.

[0060] This embodiment combines BIM technology with drone aerial survey technology and three-dimensional laser scanning technology, so that the detection of prefabricated components is transformed from traditional to intelligent and the detection accuracy and efficiency are improved; this embodiment uses BIM technology to deal with and solve the internal detailed structure of prefabricated components and the collision problem of hidden components in advance, and pre-visualizes the complex segment structure through visualization, and imports the automatically calculated engineering quantity into the factory for processing, controls the cost and improves the standardization of prefabricated components; this embodiment adopts three-dimensional laser scanning technology and drone aerial survey technology, and the two are used for complementary modeling to improve the model accuracy, and to check and detect the key dimensions of prefabricated components, improve the standardization of the linear accuracy of prefabricated components, reduce the risk of detection of high-altitude operations during hoisting, and realize the intelligent key dimension accuracy detection of completion acceptance by building a BIM+GIS fusion platform. This application is applicable to the overall linear accuracy detection of key dimensions of prefabricated components before they leave the factory, so as to avoid unqualified prefabricated components and return to the factory for rework; and to accurately control the on-site installation positioning, position adjustment and key dimension detection, so as to avoid high-altitude operations and subsequent construction problems, improve the quality detection of large workpieces, and provide in-depth analysis and construction progress control for construction management personnel. This embodiment constructs a BIM model through the building information model (BIM) technology, and uses drone aerial survey technology and 3D laser scanners to construct a point cloud model and a centimeter-level prefabricated component millimeter-level real-life 3D model, which effectively improves the factory processing accuracy detection of prefabricated workpieces and the accuracy detection of installation and positioning at the construction site, solves the defect that traditional detection methods are difficult to meet on-site detection, and makes the overall construction process of prefabricated components knowable, measurable and controllable, ensures that pre-shipment detection and construction installation and positioning detection meet the requirements of relevant acceptance specifications, avoids secondary return to the factory or difficult rework on site, thereby improving the production accuracy of prefabricated components, improving quality and efficiency, and shortening construction period.

[0061] Preferably, if Figure 2 Said step S1 specifically comprises the steps of:

[0062] S11. Establishing a BIM model of prefabricated components: using BIM modeling software such as Revit software to build a BIM model of prefabricated components based on design drawings and design requirements, clarifying the internal detailed structure modeling, refining the external overall linear modeling, and setting component detailed information and corresponding materials, and truly visually restoring the overall linear model of the prefabricated components. The modeling accuracy of the BIM model of the prefabricated components is at least LOD500 level;

[0063] S12. Collision check and in-depth analysis of BIM models of prefabricated components: Use the collision check function of BIM modeling software such as Revit software to conduct in-depth analysis including internal detailed structures and hidden component positioning to determine whether they meet the requirements of relevant design specifications. If not, make changes, adjustments and optimizations to the design to ensure the overall reliability of the prefabricated component design;

[0064] S13. Control construction cost based on BIM model of prefabricated components: Use BIM modeling software such as Revit to calculate the overall project cost of prefabricated components, clarify the overall project volume and control the construction cost in a timely manner, ensure that the construction cost is controllable in advance, and guide the factory to cut materials and process.

[0065] Preferably, if Figure 3 In step S13, using BIM modeling software to calculate the overall project cost of prefabricated components specifically includes the following steps:

[0066] S131. Use BIM modeling software to calculate the engineering quantity v of each sub-item of prefabricated components;

[0067] S132. Calculate the overall project cost c based on the market comprehensive unit price p corresponding to each sub-item engineering quantity v:

[0068] c=v×p.

[0069] Preferably, if Figure 4 Said step S2 specifically comprises the steps of:

[0070] S21. Deepen the design and guide the factory processing: import the BIM model of prefabricated components and the detailed components, complex segment engineering quantities and construction costs calculated by BIM modeling software into the factory to guide the factory cutting and processing, and strictly control the quality and size of each prefabricated component produced and processed by the factory;

[0071] S22. Modeling by combining drone aerial survey and 3D laser scanner: After the prefabricated components are processed, a stand-type 3D laser scanner is used to collect and model the key dimensions and key parts of the prefabricated components with multiple stands and no blind spots. Since it is inconvenient to scan the top of a 3D laser scanner manually, a drone is used to take low-altitude and close-up supplementary photos, and modeling is performed by combining aerial photos with 3D laser scanner scanning point clouds to make up for the problem that the top of the 3D laser scanner cannot collect and the accuracy of the point cloud model decreases with increasing altitude. A millimeter-level point cloud model is constructed to reduce the risk of high-altitude inspection operations.

[0072] S23. Key dimension detection of prefabricated components before leaving the factory: In BIM modeling software such as Rviet software, write a program to import the prefabricated component BIM model and millimeter-level point cloud model, pick up the center overlap of the prefabricated component BIM model and the millimeter-level point cloud model, automatically extract the key dimension information data of the two corresponding points of the same name on the prefabricated component BIM model and the millimeter-level point cloud model for comparison, calculate the position deviation value between the two points of the same name, and generate an accuracy report to guide the prefabrication factory's factory acceptance, to ensure that large workpieces meet the acceptance specifications before leaving the factory, and avoid returning to the factory for rework.

[0073] Preferably, if Figure 5 Said step S2 further comprises the steps of:

[0074] S24. Factory management of prefabricated components: Generate a QR code that can be pasted on a conspicuous position of the prefabricated component based on the name, size, material, key dimension inspection report and component installation location of the prefabricated component that meets the acceptance specifications. On-site management personnel and installation workers can directly scan the QR code information to view the basic information of the prefabricated component at any time and guide on-site construction operations.

[0075] Preferably, if Figure 6 Said step S3 specifically comprises the steps of:

[0076] S31. Establishment of the overall centimeter-level prefabricated component millimeter-level real-scene 3D model: Since the key dimension detection of the hoisted prefabricated components has the risk of high-altitude operation, the traditional manual method is difficult to detect and is unsafe. Therefore, the construction site and the surrounding environment are surveyed and collected by drones to establish a centimeter-level real-scene 3D model, and the prefabricated components hoisted on site are combined with the low-altitude and close-up collection of photos by drones and the bottom scanned by 3D laser scanners to make up for the defects in the bottom modeling of drone aerial surveys, and the overall centimeter-level and millimeter-level real-scene 3D models of prefabricated components are constructed to reduce the risk of high-altitude operation detection and improve the detection speed and accuracy.

[0077] S32. Build a BIM+GIS fusion platform: integrate and fuse the BIM model of prefabricated components with the geographical location of the construction site and the overall centimeter-level and millimeter-level real-life 3D models of prefabricated components on the GIS software platform to obtain a BIM+GIS fusion platform, so that the BIM model of prefabricated components has on-site geographical information;

[0078] S33. Detection of key dimensions after installation of prefabricated components: Taking advantage of the secondary development of GIS software platforms such as ArcGIS Pro, write a program to automatically extract the key dimension information data of the two same-name points corresponding to the BIM model of the prefabricated component and the overall centimeter-level and millimeter-level real-life 3D model of the prefabricated component in the BIM+GIS fusion platform, calculate the position deviation value between the two same-name points, and generate an accuracy report to guide on-site adjustment of components and acceptance, improve the quality inspection of large workpieces, and speed up optimization, adjustment and acceptance.

[0079] Preferably, when performing multi-source data integration and fusion in step S32, the steps are specifically included:

[0080] S321, setting the project coordinates of the prefabricated component BIM model, and placing the construction site geographic coordinate system file (PRJ format) and the prefabricated component BIM model in the same folder to preliminarily align the two models;

[0081] S322, use the seven-parameter mathematical model to perform model precise registration, and the target coordinates before conversion are , the original coordinates after conversion are ; Among them, the plane parameters are , the rotation parameter is , the scale parameter is , then a seven-parameter mathematical model is established:

[0082] ,

[0083] like Figure 7 As shown, take at least 3 groups of points with the same name and find the original coordinates of the construction site , and accurately align the model; the BIM model of the prefabricated component has on-site geographic information, which is convenient for management personnel and construction operations to analyze the layout of the crane, eliminate safety hazards on site, and obtain geographic information as needed to guide on-site lifting.

[0084] Preferably, if Figure 8 Another embodiment of the present application further provides a device for detecting key dimensions of large prefabricated components, preferably using the method for detecting key dimensions of large prefabricated components as described above, comprising:

[0085] Prefabricated component BIM model building module, which is used to build the prefabricated component BIM model based on the building information model technology, and to carry out collision inspection and in-depth analysis, three-dimensional visualization, engineering quantity calculation and in-depth design to control the cost of the internal detailed structure of the prefabricated component BIM model;

[0086] The processing stage inspection module is used to guide the factory cutting and processing according to the BIM model of prefabricated components during the factory processing stage, and use 3D laser scanners to scan key dimensions and drones to collect photos at low altitude and close range to build a millimeter-level point cloud model of prefabricated components. Based on the BIM model of prefabricated components, the prefabricated components are automatically inspected and the key dimension accuracy is detected to ensure that the accuracy of the components before leaving the factory meets the acceptance specifications.

[0087] The installation phase detection module is used to establish a centimeter-level real-life 3D model of the construction site and its surrounding environment through aerial survey collection by drone-mounted aerial survey equipment during the installation phase on the construction site. The drone is used to collect photos at low altitude and close range, and a 3D laser scanner is used to scan the bottom. Together, a complete set of centimeter-level and millimeter-level real-life 3D models of the construction site are constructed. Multi-source data is integrated and fused with the BIM model of the prefabricated components on the GIS software platform to obtain the BIM+GIS fusion platform. The BIM+GIS fusion platform is used to realize automatic detection of key dimensional accuracy during the on-site installation phase to ensure compliance with relevant acceptance specifications for prefabricated components.

[0088] like Fig. 9 As shown, a preferred embodiment of the present application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method for detecting critical dimensions of large prefabricated components in the above-mentioned embodiment when executing the computer program.

[0089] like Fig.10 As shown, the preferred embodiment of the present application also provides a computer device, which can be a terminal or a liveness detection server, and its internal structure diagram can be as shown in Fig.10 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with other external computer devices through a network connection. When the computer program is executed by the processor, the steps of the above-mentioned large prefabricated component key dimension detection method are implemented.

[0090] Those skilled in the art will understand that Fig.10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0091] A preferred embodiment of the present application further provides a storage medium, which includes a stored program, and when the program is executed, controls the device where the storage medium is located to execute the steps of the large prefabricated component key dimension detection method in the above embodiment.

[0092] To summarize, this application complements the advantages of building information modeling (BIM) technology, drone aerial survey technology, and three-dimensional laser scanning technology, breaks through the traditional human-dominated detection form, and introduces a key dimension detection method for large prefabricated components. It can quickly detect and analyze the accuracy of prefabricated components before leaving the factory and during the installation process, ensure that the prefabricated components meet the relevant acceptance specifications before leaving the factory and during the installation process, avoid the prefabricated components being returned to the factory for a second time and the low positioning accuracy of on-site installation, and improve the detection efficiency and accuracy of large workpieces.

[0093] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0094] If the functions described in the method of this embodiment are implemented in the form of software functional units and sold or used as independent products, they can be stored in one or more computing devices readable storage media. Based on this understanding, the part of the embodiment of the present application that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computing device (which can be a personal computer, server, mobile computing device or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program code.

[0095] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes. The schemes in the embodiments of the present application may be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0096] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0097] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0098] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0099] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0100] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for detecting key dimensions of large prefabricated components, characterized in that: Includes steps: S1. Construct a BIM model of prefabricated components based on building information modeling technology, and conduct collision inspection and in-depth analysis, three-dimensional visualization, actuarial calculation and statistics of engineering quantities, and in-depth design to control construction cost on the internal detailed structure of the BIM model of prefabricated components; S2. During the factory processing stage, the BIM model of prefabricated components is used to guide the factory's material cutting and processing, and a millimeter-level point cloud model of prefabricated components is constructed by scanning key dimensions with a 3D laser scanner and collecting photos from a drone at low altitude and close range. The prefabricated components are automatically inspected and the key dimension accuracy is tested based on the BIM model of the prefabricated components to ensure that the accuracy of the components before leaving the factory meets the acceptance specification requirements; S3. During the installation stage at the construction site, the construction site and surrounding environment are surveyed and collected by drone-mounted aerial survey equipment to establish a centimeter-level real-life 3D model. The drone is used to collect photos at low altitude and close range, and a 3D laser scanner is used to scan the bottom. Together, a complete set of centimeter-level and millimeter-level real-life 3D models of the construction site are constructed. Multi-source data integration and fusion with the BIM model of the prefabricated components are carried out on the GIS software platform to obtain a BIM+GIS fusion platform. The BIM+GIS fusion platform is used to realize automatic detection of key dimensional accuracy during the on-site installation stage to ensure compliance with relevant acceptance specifications for prefabricated components. The step S3 specifically comprises the following steps: S31. Establishment of the overall centimeter-level prefabricated component millimeter-level real-scene 3D model: The construction site and the surrounding environment are surveyed and collected by drone with an aerial survey device to establish a centimeter-level real-scene 3D model. The prefabricated components hoisted on site are combined with low-altitude and close-up photos collected by drones and the bottom scanned by a 3D laser scanner to build a model, and the overall centimeter-level and millimeter-level real-scene 3D model of the prefabricated components is constructed; S32. Build a BIM+GIS fusion platform: integrate and fuse the BIM model of prefabricated components with the geographical location of the construction site and the overall centimeter-level and millimeter-level real-life 3D models of prefabricated components on the GIS software platform to obtain a BIM+GIS fusion platform, so that the BIM model of prefabricated components has on-site geographical information; S33. Detection of key dimensions after installation of prefabricated components: Taking advantage of the secondary development of the GIS software platform, the key dimension information data of two points with the same name corresponding to the BIM model of the prefabricated component and the real-life 3D model of the whole centimeter level and the millimeter level of the prefabricated component are automatically extracted in the BIM+GIS fusion platform for comparison, and the position deviation value between the two points with the same name is calculated, and an accuracy report is generated to guide on-site adjustment of components and acceptance; When the multi-source data integration and fusion is performed in step S32, the specific steps include: S321, setting the project coordinates of the prefabricated component BIM model, and placing the construction site geographic coordinate system file and the prefabricated component BIM model in the same folder to preliminarily align the two models; S322, use the seven-parameter mathematical model to perform model precise registration, and the target coordinates before conversion are , the original coordinates after conversion are ; Among them, the plane parameters are , the rotation parameter is , the scale parameter is , then the seven-parameter mathematical model is: ， Take at least 3 groups of points with the same name and find the original coordinates of the construction site , and accurately align the model; the BIM model of the prefabricated component has on-site geographic information, which is convenient for management personnel and construction operations to analyze the layout of the crane, eliminate safety hazards on site, and obtain geographic information as needed to guide on-site lifting.

2. The method for detecting key dimensions of large prefabricated components according to claim 1, characterized in that: The step S1 specifically includes the following steps: S11. Establishing a BIM model of prefabricated components: using BIM modeling software to build a BIM model of prefabricated components based on design drawings and design requirements, clarifying the internal detailed structure modeling, refining the external overall linear modeling, and setting component detailed information and corresponding materials, and truly visually restoring the overall linear model of the prefabricated components. The modeling accuracy of the BIM model of the prefabricated components is at least LOD500 level; S12. Collision check and in-depth analysis of BIM model of prefabricated components: Use the collision check function of BIM modeling software to conduct in-depth analysis including internal detailed structure and hidden component positioning to determine whether it meets the requirements of relevant design specifications. If not, make changes, adjustments and optimizations to the design to ensure the overall reliability of the prefabricated component design; S13. Control construction cost based on BIM model of prefabricated components: Use BIM modeling software to calculate the overall project cost of prefabricated components, clarify the overall project volume and control the construction cost in a timely manner, ensure that the construction cost is controllable in advance, and guide the factory to cut materials and process.

3. The method for detecting key dimensions of large prefabricated components according to claim 2, characterized in that: In step S13, the overall project cost of prefabricated components is calculated using BIM modeling software, which specifically includes the following steps: S131. Use BIM modeling software to calculate the quantities of each sub-item of prefabricated components v ; S132, according to the quantity of each sub-item v Corresponding market comprehensive unit price p , calculate the overall project cost c : c = v × p 。 4. The method for detecting key dimensions of large prefabricated components according to claim 1, characterized in that: The step S2 specifically includes the following steps: S21. Deepen the design and guide the factory processing: import the BIM model of prefabricated components and the detailed components, complex segment engineering quantities and construction costs calculated by BIM modeling software into the factory to guide the factory cutting and processing, and strictly control the quality and size of each prefabricated component produced and processed by the factory; S22. Modeling by combining drone aerial survey and 3D laser scanner: After the prefabricated components are processed, a three-dimensional laser scanner with multiple stations is used to collect and model the key dimensions and key parts of the prefabricated components without blind spots. The drone is used for low-altitude and close-up supplementary shooting, and aerial photos are combined with the point cloud scanned by the three-dimensional laser scanner to build a millimeter-level point cloud model. S23. Key dimension detection of prefabricated components before leaving the factory: Import the BIM model of prefabricated components and the millimeter-level point cloud model into the BIM modeling software, pick up the center overlap of the BIM model of prefabricated components and the millimeter-level point cloud model, automatically extract the key dimension information data of the two corresponding points of the same name on the BIM model of prefabricated components and the millimeter-level point cloud model for comparison, calculate the position deviation value between the two points of the same name, and generate an accuracy report to guide the prefabrication factory's factory acceptance, to ensure that large workpieces meet the acceptance specifications before leaving the factory, to avoid returning to the factory for rework.

5. The method for detecting key dimensions of large prefabricated components according to claim 4, characterized in that: The step S2 further comprises the steps of: S24. Factory management of prefabricated components: Generate a QR code that can be pasted on a conspicuous position of the prefabricated component based on the name, size, material, key dimension inspection report and component installation location of the prefabricated component that meets the acceptance specifications. On-site management personnel and installation workers can directly scan the QR code information to view the basic information of the prefabricated component at any time and guide on-site construction operations.

6. A device for detecting key dimensions of large prefabricated components, using the method for detecting key dimensions of large prefabricated components as claimed in any one of claims 1 to 5, characterized in that: include: Prefabricated component BIM model building module, which is used to build the prefabricated component BIM model based on the building information model technology, and to carry out collision inspection and in-depth analysis, three-dimensional visualization, engineering quantity calculation and in-depth design to control the cost of the internal detailed structure of the prefabricated component BIM model; The processing stage inspection module is used to guide the factory cutting and processing according to the BIM model of prefabricated components during the factory processing stage, and use 3D laser scanners to scan key dimensions and drones to collect photos at low altitude and close range to build a millimeter-level point cloud model of prefabricated components. Based on the BIM model of prefabricated components, the prefabricated components are automatically inspected and the key dimension accuracy is detected to ensure that the accuracy of the components before leaving the factory meets the acceptance specifications. The installation phase detection module is used to establish a centimeter-level real-life 3D model of the construction site and its surrounding environment through aerial survey collection by drone-mounted aerial survey equipment during the installation phase on the construction site. The drone is used to collect photos at low altitude and close range, and a 3D laser scanner is used to scan the bottom. Together, a complete set of centimeter-level and millimeter-level real-life 3D models of the construction site are constructed. Multi-source data is integrated and fused with the BIM model of the prefabricated components on the GIS software platform to obtain the BIM+GIS fusion platform. The BIM+GIS fusion platform is used to realize automatic detection of key dimensional accuracy during the on-site installation phase to ensure compliance with relevant acceptance specifications for prefabricated components.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method for detecting critical dimensions of large prefabricated components as claimed in any one of claims 1 to 5 are implemented.

8. A storage medium, comprising a stored program, which controls a device where the storage medium is located to execute the steps of the method for detecting critical dimensions of large prefabricated components as claimed in any one of claims 1 to 5 when the program is executed.

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