Underground cable line planning method based on AR technology

Abstract

The invention relates to the technical field of line planning management, in particular to a buried cable line planning method based on the AR technology. The method comprises the following steps: acquiring underground terrain three-dimensional data and underground facility pipeline distribution data corresponding to a buried cable planning area, performing three-dimensional digital modeling, and displaying the data on AR mobile equipment in an overlapping manner; obtaining a corresponding buried cable virtual layout line through AR mobile equipment, carrying out line underground pipeline cross constraint analysis and underground line interference evaluation analysis, and carrying out constraint line feedback adjustment design on the buried cable virtual layout line to generate a buried cable line constraint feedback adjustment design scheme; and according to the buried cable line constraint feedback adjustment design scheme, carrying out line feedback optimization planning processing on the buried cable virtual laying line to generate a buried cable laying optimization planning line. According to the invention, an efficient, accurate and intelligent route planning management process can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of line planning and management, and in particular to an underground cable line planning method based on AR technology. Background Art

[0002] Augmented reality AR technology can achieve precise positioning and dynamic display of three-dimensional space by integrating virtual information with the real environment. It has been widely used in architectural design, medical care, industrial manufacturing and other fields. By applying AR technology to underground cable line planning, it can achieve three-dimensional visualization of underground pipelines and cable lines, and obtain key data and environmental information in the cable laying process in real time, thereby improving planning accuracy and construction efficiency.

[0003] In addition, a Chinese patent with publication number CN101710353A proposes an underground pipe network layout method based on a three-dimensional virtual city, including preprocessing remote sensing image data, digital elevation model data, and three-dimensional building model data to construct a three-dimensional virtual city system; realizing the generation and management of an underground three-dimensional pipe network model based on pipe point data, pipe well data, and two-dimensional pipeline data in the three-dimensional virtual city system; selecting the starting and ending points of the required pipe network according to the underground three-dimensional pipe network model, and generating a variety of pipe network layout plans; performing collision processing on the pipe network layout plan according to relevant specifications and standards, searching for facilities around the pipe network, and analyzing factors affecting the pipe network layout; performing optimization analysis based on the factors affecting the pipe network layout, obtaining an optimization plan suitable for the underground pipe network layout, and managing and displaying the results in the three-dimensional virtual city system, so as to optimize the layout of underground pipelines and obtain a path plan for underground pipeline layout planning.

[0004] Although the technical solution proposed in the above patent can generate and optimize through dynamic modeling and multiple pipeline layout schemes, so as to achieve a basis for laying pipelines and provide support for urban underground pipeline planning, at the same time, the existing underground cable planning technology mostly adopts three-dimensional virtual modeling based on GIS (geographic information system) or traditional CAD (computer-aided design). Although this method can display the layout of cable lines to a certain extent, it cannot handle the distribution constraints corresponding to various obstacles and facility pipelines in the complex underground environment in real time, and it is difficult to interact with the dynamic changes of the construction site, resulting in a large deviation between the construction site and the design process, which in turn affects the progress and quality of cable line planning. Summary of the invention

[0005] Based on this, it is necessary for the present invention to provide a buried cable line planning method based on AR technology to solve at least one of the above-mentioned technical problems.

[0006] To achieve the above object, a method for planning underground cable lines based on AR technology includes the following steps:

[0007] Step S1: Acquire the underground terrain three-dimensional data and underground facility pipeline distribution data corresponding to the underground cable planning area, and perform three-dimensional digital modeling of the underground cable planning area based on the underground terrain three-dimensional data and the underground facility pipeline distribution data to generate a digital model of underground facilities in the planning area, and use augmented reality technology to overlay and display the digital model of underground facilities in the planning area on an AR mobile device;

[0008] Step S2: Obtain the corresponding virtual layout line of the buried cable through the AR mobile device, and perform underground pipeline cross-constraint analysis on the digital model of underground facilities in the planned area based on the virtual layout line of the buried cable to generate virtual underground pipeline cross-constraints;

[0009] Step S3: Obtain the corresponding underground obstacle distribution and underground interference facility distribution in the planning area through the digital model of underground facilities in the planning area, and perform underground line interference evaluation and analysis on the virtual laying line of the buried cable based on the underground obstacle distribution and underground interference facility distribution in the planning area, and obtain the virtual line underground obstacle interference constraint and virtual line underground electromagnetic wave interference constraint;

[0010] Step S4: Based on the virtual line underground pipeline crossing constraints, the virtual line underground obstacle interference constraints and the virtual line underground electromagnetic wave interference constraints, the virtual laying line of the buried cable is subjected to constraint line feedback adjustment design to generate a buried cable line constraint feedback adjustment design scheme; according to the buried cable line constraint feedback adjustment design scheme, the virtual laying line of the buried cable is subjected to line feedback optimization planning processing to generate an underground cable laying optimization planning line.

[0011] Further, step S1 includes the following steps:

[0012] Step S11: obtaining high-resolution surface images corresponding to the underground cable planning area through remote sensing satellites, and performing regional three-dimensional reconstruction of the surface morphology corresponding to the underground cable planning area in combination with ground laser scanning data corresponding to the underground cable planning area, so as to generate a three-dimensional reconstruction model of the surface morphology of the planning area;

[0013] Step S12: Based on the three-dimensional reconstruction model of the surface morphology of the planned area, a three-dimensional scanning of the underground terrain space of the underground cable planning area is performed using geological radar imaging technology and underground acoustic wave detection technology to obtain the three-dimensional data of the underground terrain corresponding to the underground cable planning area, including the three-dimensional data of the underground terrain potential cavities, underground terrain settlement zones and underground terrain fault zones;

[0014] Step S13: obtaining a historical underground facility pipeline layout design scheme corresponding to the underground cable planning area, and performing a facility pipeline distribution analysis on the underground cable planning area based on the historical underground facility pipeline layout design scheme to obtain underground facility pipeline distribution data corresponding to the underground cable planning area;

[0015] Step S14: Performing three-dimensional digital modeling of the underground cable planning area based on the three-dimensional underground terrain data and the underground facility pipeline distribution data to generate a digital model of the underground facilities in the planning area;

[0016] Step S15: Using augmented reality technology, the digital model of underground facilities in the planned area is superimposed and displayed on the AR mobile device.

[0017] Further, step S14 includes the following steps:

[0018] Step S141: Preliminary fusion of the underground terrain space of the underground cable planning area based on the underground terrain three-dimensional data to generate a preliminary three-dimensional framework model of the underground terrain space of the planning area;

[0019] Step S142: Detailed analysis of the underground facility pipeline distribution data is performed to obtain detailed distribution of underground facility pipelines in the planned area, including the direction, buried depth and interlaced relationship of various underground facility pipelines;

[0020] Step S143: Based on the detailed distribution of underground facilities and pipelines in the planning area, a preliminary three-dimensional framework model of the underground terrain space in the planning area is subjected to three-dimensional pipeline mapping digital modeling to generate a digital model of underground facilities in the planning area.

[0021] Further, step S2 includes the following steps:

[0022] Step S21: obtaining a corresponding underground cable virtual layout line through an AR mobile device;

[0023] Step S22: Based on the virtual layout of the buried cable, an in-depth relative position analysis is performed on the corresponding existing facility pipeline layout in the digital model of the underground facilities in the planned area to obtain the relative position relationship between the cable virtual line and the existing pipeline layout, including the spacing, depth and intersection between the cable and the existing pipeline;

[0024] Step S23: Based on the spacing, depth and intersection between the cable and the existing pipeline, the virtual layout line of the buried cable and the corresponding existing facility pipeline layout in the digital model of the underground facilities in the planned area are determined to obtain the intersection distribution area between the virtual cable line and the existing pipeline layout;

[0025] Step S24: performing a finite element cross structural damage assessment on the cross distribution area between the cable virtual line and the existing pipeline layout to generate a structural damage risk factor for the cross area between the cable virtual line and the existing pipeline layout;

[0026] Step S25: performing underground pipeline crossing constraint analysis on the crossing distribution area between the virtual cable line and the existing pipeline layout based on the structural damage risk factor of the crossing area between the virtual cable line and the existing pipeline layout to generate virtual line underground pipeline crossing constraints.

[0027] Further, step S23 includes the following steps:

[0028] Step S231: performing spatial geometric constraint analysis on the virtual laying line of the buried cable and the corresponding existing facility pipeline layout in the digital model of underground facilities in the planned area based on the spacing and depth between the cable and the existing pipeline, so as to generate a spatial geometric layout constraint relationship between the virtual cable line and the existing pipeline layout;

[0029] Step S232: Calculate the minimum safety boundary area of ​​the intersection between the cable virtual line and the existing pipeline layout based on the spatial geometric layout constraint relationship between the cable virtual line and the existing pipeline layout to obtain the minimum safety boundary area of ​​the intersection position between the cable virtual line and the existing pipeline layout;

[0030] Step S233: Determine the intersection area of ​​the virtual laying line of the buried cable and the corresponding existing facility pipeline layout in the digital model of the underground facilities in the planned area according to the minimum safe boundary area of ​​the intersection position between the virtual cable line and the existing pipeline layout, and obtain the intersection distribution area between the virtual cable line and the existing pipeline layout.

[0031] Further, step S24 includes the following steps:

[0032] Step S241: performing finite element partitioning modeling on the intersection distribution area between the cable virtual line and the existing pipeline layout to generate a finite element sub-model of the intersection area between each cable and the existing pipeline;

[0033] Step S242: Perform stress and deformation simulation analysis on the finite element sub-model of the intersection area between each cable and the existing pipeline by introducing a preset geomechanical model to generate the cable pipeline stress distribution, cable pipeline deformation component and cable pipeline structural mechanics interference factor corresponding to the finite element of each intersection area;

[0034] Step S243: Based on the cable pipeline stress distribution corresponding to the finite elements of each intersection area, the cable pipeline deformation component and the cable pipeline structural mechanics interference factor, a structural damage assessment calculation formula is used to perform a structural damage assessment calculation on the intersection area finite element sub-model between each cable and the existing pipeline to generate a structural damage risk factor for the intersection area between the cable virtual line and the existing pipeline layout.

[0035] Furthermore, the calculation formula for the cross structure damage assessment in step S243 is specifically:

[0036]

[0037] Where R is the structural damage risk factor of the intersection area between the cable virtual line and the existing pipeline layout, Ω is the intersection three-dimensional space area between the cable and the existing pipeline, x is the spatial coordinate of the intersection area, n is the total number of finite elements in the intersection area, σ i (x) is the stress distribution of the cable pipeline corresponding to the finite element of the i-th intersection area at the spatial coordinate x, α i is the stress structure damage adjustment factor corresponding to the finite element of the i-th intersection area, ε i (x) is the cable pipeline deformation component corresponding to the finite element of the i-th intersection area at the spatial coordinate x, κ i (x) is the cable pipeline structural mechanics interference factor corresponding to the finite element of the i-th intersection area at the spatial coordinate x, β i is the deformation structure damage adjustment factor corresponding to the finite element of the i-th intersection area, and η is the correction coefficient of the structural damage risk factor of the intersection area.

[0038] Further, step S3 includes the following steps:

[0039] Step S31: obtaining the corresponding underground obstacle distribution and underground interference facility distribution in the planning area through the digital model of underground facilities in the planning area;

[0040] Step S32: performing underground line interference numerical simulation on the underground obstacle distribution in the planning area and the underground interference facility distribution in the planning area respectively, so as to generate the underground obstacle interference distribution field in the planning area and the underground facility electromagnetic interference distribution field in the planning area;

[0041] Step S33: performing underground obstacle interference constraint evaluation and analysis on the virtual laying line of the buried cable based on the underground obstacle interference distribution field in the planned area to obtain the underground obstacle interference constraint of the virtual line;

[0042] Step S34: performing underground electromagnetic wave interference constraint evaluation and analysis on the virtual layout line of the buried cable based on the electromagnetic interference distribution field of the underground facilities in the planned area, and obtaining the underground electromagnetic wave interference constraint of the virtual line.

[0043] Further, step S4 includes the following steps:

[0044] Step S41: performing pipeline intersection conflict detection and analysis on the underground cable virtual layout line based on the underground pipeline intersection constraint of the virtual line, and obtaining the underground cable layout pipeline intersection interference constraint model, which describes the pipeline intersection area and its influence range that need to be avoided during the underground cable line layout process;

[0045] Step S42: Based on the virtual line underground obstacle interference constraint, use the pipeline laying obstacle interference evaluation calculation formula to identify and evaluate the underground obstacle interference of the underground cable virtual laying line, and obtain the degree of interference obstruction of the underground cable laying pipeline obstacle;

[0046] Step S43: performing electromagnetic field distribution analysis on the virtual underground cable layout line based on the underground electromagnetic wave interference constraint of the virtual line to obtain the electromagnetic field interference distribution of the underground cable layout pipeline; performing electromagnetic field interference potential assessment analysis on the corresponding virtual underground cable layout line based on the electromagnetic field interference distribution of the underground cable layout pipeline to generate the electromagnetic interference potential distribution field of the underground cable layout pipeline;

[0047] Step S44: Based on the underground cable laying pipeline cross interference constraint model, the interference obstruction degree of the underground cable laying pipeline obstacles and the underground cable laying pipeline electromagnetic interference potential distribution field, the underground cable laying pipeline virtual laying line is subjected to constraint line feedback adjustment design to generate an underground cable line constraint feedback adjustment design scheme;

[0048] Step S45: performing line feedback optimization planning processing on the underground cable virtual layout line according to the underground cable line constraint feedback adjustment design scheme to generate an underground cable layout optimization planning line.

[0049] Furthermore, the calculation formula for evaluating the interference of obstacles in laying pipelines in step S42 is specifically:

[0050]

[0051] In the formula, I to is the interference degree of obstacles in underground cable laying pipelines, L is the total length of the virtual laying line of the underground cable, x ′ is the distance location parameter of the virtual line layout, m is the total number of underground obstacle interference constraints of the virtual line, and f j (x ′ ) is the jth virtual line underground obstacle interference constraint at distance position x ′ The relative position geometric influence factor, G j (x ′ ) is the jth virtual line underground obstacle interference constraint at distance position x′ The obstacle interference intensity value at the location, ξ is the correction coefficient of the degree of interference from obstacles in the buried cable laying pipeline.

[0052] Beneficial effects of the present invention:

[0053] Compared with the prior art, the buried cable line planning method based on AR technology proposed in the present invention has the beneficial effect of achieving a comprehensive and detailed understanding of the underground space by accurately acquiring the three-dimensional data of the underground environment of the planning area and combining the modern geographic information system (GIS) and geological survey technology. By acquiring the three-dimensional data of the underground terrain and the distribution data of the underground facilities and pipelines, the complex structure of the underground environment and the distribution of the existing facilities can be accurately reflected. The generated digital model of underground facilities not only provides a visual and intuitive underground environment data map for power engineering personnel, but also provides data support for subsequent planning and design. The digital models are superimposed and displayed on the AR mobile phone by using augmented reality (AR) technology. The equipment can combine virtual and reality, allowing workers to view the distribution of underground facilities and plan the expected path of cables in actual scenarios. This technical application improves the decision-making efficiency of on-site workers, reduces human errors, and provides great help for safety risk management during the construction process, especially in the complex underground pipeline environment of the city. The use of AR technology can effectively avoid interference with existing pipelines, optimize cable laying plans, and improve construction accuracy and safety. Through intuitive AR display, potential problems can be foreseen in advance and plans can be adjusted in time, which helps to interact with the dynamic changes of the construction site in the early stages to avoid corresponding design defects, thereby achieving more detailed geographic cable line planning. Secondly, the corresponding virtual laying route of the buried cable is obtained through the AR mobile device, and the underground pipeline cross-constraint analysis of the line is performed on the digital model of the underground facilities in the planned area based on the virtual laying route of the buried cable. The virtual route of the cable laying can be obtained in real time during the cable planning and design process, which greatly improves the accuracy and operability of the design scheme. By interacting with the digital model of the underground facilities, designers can view the spatial relationship between the cable line and the existing underground pipeline in real time, and accurately identify the cross-distribution area of ​​the cable and other pipelines. On this basis, the underground pipeline cross-constraint analysis is performed, which can efficiently identify potential conflict points and interference areas, and avoid physical collision or interference with existing pipelines during the cable laying process. Through this analysis, designers can adjust the cable laying route in time to ensure that the design scheme does not cause unnecessary conflicts with the underground pipelines in space. The timeliness and accuracy of this cross-constraint analysis can not only reduce changes and adjustments in actual construction, but also avoid damage to existing facilities and improve the safety and feasibility of underground cable laying.Then, by using the digital model of the underground facilities in the planning area, the corresponding underground obstacle distribution and underground interference facility distribution in the planning area are obtained, and the underground line interference evaluation and analysis of the virtual layout of the buried cable is carried out based on the underground obstacle distribution and underground interference facility distribution in the planning area. During the analysis process, designers can effectively analyze the distribution constraints corresponding to various obstacles and facility pipelines in the complex underground environment to evaluate the impact on the layout of the cable line. For example, underground rock formations, built buildings or other underground pipelines will form physical obstacles, and electromagnetic wave interference sources will affect the performance and operation efficiency of the cable. This comprehensive interference evaluation and analysis can incorporate these factors into the cable The scope of cable design considerations is determined, and corresponding constraints are proposed, such as avoiding cables from passing through areas with strong electromagnetic interference or bypassing areas with large obstacles. Through this analysis, designers can identify potential problems in advance and optimize and adjust the virtual routing to ensure that the design plan can be smoothly implemented during the implementation phase. Especially in complex urban environments or areas with limited underground space, underground interference assessment can maximize the avoidance of potential damage to cable lines and reduce subsequent maintenance and repair costs, thereby improving the progress and quality of cable line planning. This process helps designers obtain a more comprehensive solution and ensures that the cable layout can meet both functional requirements and cope with complex underground conditions in the actual environment. Finally, by constraining the line feedback adjustment design of the virtual laying line of the buried cable based on the virtual line underground pipeline crossing constraint, the virtual line underground obstacle interference constraint and the virtual line underground electromagnetic wave interference constraint, the optimization design of the buried cable line can be achieved. This process helps the design team to make feedback adjustments to the original line and solves potential problems that have not been fully considered in the early planning. The feedback adjustment design scheme continuously adjusts and optimizes the cable laying path to ensure that the final cable line layout best meets the actual underground environment and engineering needs, while avoiding conflicts or interference with other underground facilities. This optimization design method not only ensures the safety of the cable line, but also improves the construction feasibility, later maintenance convenience and long-term reliability of the line. The layout optimization planning line generated based on this optimization design scheme can improve the construction efficiency to a greater extent, reduce later debugging and maintenance problems, and optimize the space use of cable laying, thereby providing a more complete and executable cable laying plan, reducing the unforeseen complexity and cost in construction, and reducing the layout deviation between the construction site and the design drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments thereof made with reference to the following drawings:

[0055] Figure 1 It is a schematic diagram of the steps of the underground cable line planning method based on AR technology of the present invention;

[0056] Figure 2 for Figure 1 Detailed step flow diagram of step S1;

[0057] Figure 3 for Figure 2 Detailed step flow chart of step S14 in FIG. DETAILED DESCRIPTION

[0058] The technical method of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by technicians in this field without creative work are within the scope of protection of the present invention.

[0059] To achieve this, please refer to Figures 1 to 3 The present invention provides a method for planning an underground cable line based on AR technology, the method comprising the following steps:

[0060] Step S1: Acquire the underground terrain three-dimensional data and underground facility pipeline distribution data corresponding to the underground cable planning area, and perform three-dimensional digital modeling of the underground cable planning area based on the underground terrain three-dimensional data and the underground facility pipeline distribution data to generate a digital model of underground facilities in the planning area, and use augmented reality technology to overlay and display the digital model of underground facilities in the planning area on an AR mobile device;

[0061] Step S2: Obtain the corresponding virtual layout line of the buried cable through the AR mobile device, and perform underground pipeline cross-constraint analysis on the digital model of underground facilities in the planned area based on the virtual layout line of the buried cable to generate virtual underground pipeline cross-constraints;

[0062] Step S3: Obtain the corresponding underground obstacle distribution and underground interference facility distribution in the planning area through the digital model of underground facilities in the planning area, and perform underground line interference evaluation and analysis on the virtual laying line of the buried cable based on the underground obstacle distribution and underground interference facility distribution in the planning area, and obtain the virtual line underground obstacle interference constraint and virtual line underground electromagnetic wave interference constraint;

[0063] Step S4: Based on the virtual line underground pipeline crossing constraints, the virtual line underground obstacle interference constraints and the virtual line underground electromagnetic wave interference constraints, the virtual laying line of the buried cable is subjected to constraint line feedback adjustment design to generate a buried cable line constraint feedback adjustment design scheme; according to the buried cable line constraint feedback adjustment design scheme, the virtual laying line of the buried cable is subjected to line feedback optimization planning processing to generate an underground cable laying optimization planning line.

[0064] In the embodiment of the present invention, please refer to Figure 1 FIG. 1 is a schematic diagram of the steps of the underground cable line planning method based on AR technology of the present invention. In this example, the underground cable line planning method based on AR technology includes the following steps:

[0065] Step S1: Acquire the underground terrain three-dimensional data and underground facility pipeline distribution data corresponding to the underground cable planning area, and perform three-dimensional digital modeling of the underground cable planning area based on the underground terrain three-dimensional data and the underground facility pipeline distribution data to generate a digital model of underground facilities in the planning area, and use augmented reality technology to overlay and display the digital model of underground facilities in the planning area on an AR mobile device;

[0066] In the embodiment of the present invention, high-resolution surface image data is obtained by using remote sensing satellites to cover the geographical scope of the underground cable planning area. The satellite image should be an image with a resolution of 30 cm or higher to ensure that the surface features are reflected clearly enough. The surface image extracted by remote sensing technology will be used to capture the spatial position and form of the terrain, buildings, roads and other surface facilities in the area, and the underground of the planning area is scanned by using geological radar imaging technology to obtain the spatial three-dimensional data of the underground terrain in the area. The geological radar (GPR) system can reveal the changes in the underground layer, including cavities, subsidence zones and fault zones, by emitting electromagnetic waves and receiving their reflected signals in different underground media, so as to obtain the underground terrain three-dimensional data corresponding to the underground cable planning area. By consulting the historical planning drawings and underground facility archives provided by the relevant government or construction unit, the past or existing underground pipeline layout data of the area are extracted. These data usually include the specific location, depth and layout form of water pipes, power pipelines, communication pipelines, gas pipelines, etc., and the relative position between pipelines and the intersection or overlap relationship with other underground facilities are analyzed to obtain an accurate underground facility pipeline distribution data, thereby obtaining the corresponding underground facility pipeline distribution data. At the same time, three-dimensional digital modeling is carried out by combining the underground terrain three-dimensional data and underground facility pipeline distribution data obtained in the previous steps. First, the three-dimensional data of the underground terrain and the facility pipeline distribution data are imported into the modeling software, such as Autodesk Revit or Bentley MicroStation, for integration and modeling. The modeling process requires the three-dimensional terrain information obtained by geological radar and underground acoustic wave detection to be converted into a digital three-dimensional grid, and then integrated with the historical facility pipeline distribution data to form an integrated three-dimensional model of underground facilities. The model needs to ensure that the precise position, depth, direction and mutual relationship of all pipelines are clearly expressed, so as to generate a digital model of underground facilities in the planned area. Then, the digital model of underground facilities is superimposed on the mobile device for display by utilizing augmented reality (AR) technology. Specifically, an AR device (such as an AR-enabled smartphone or AR glasses) is used to capture the surface image of the planned area through a real-time camera, and the digital model of the underground facilities is virtually superimposed through software. The AR system adjusts the position and angle of the model in real time according to the viewing angle of the real-time camera, so that the user can see the virtual display of the underground facilities in the actual environment, and ensures the accurate position and scale of the underground facility model through positioning technology (such as GPS, inertial measurement unit, visual calibration, etc.). The user can interact on the AR device through a touch screen or voice commands to view detailed information of the underground facilities, and can simulate operations such as cable laying and facility repair to optimize the planning and management of underground cable lines.

[0067] Step S2: Obtain the corresponding virtual layout line of the buried cable through the AR mobile device, and perform underground pipeline cross-constraint analysis on the digital model of underground facilities in the planned area based on the virtual layout line of the buried cable to generate virtual underground pipeline cross-constraints;

[0068] In an embodiment of the present invention, augmented reality (AR) technology is used to obtain a virtual layout route of an underground cable through an AR mobile device. In specific implementation, the target area is scanned in real time by the camera of the AR device, and the data of sensors such as GPS positioning, inertial measurement unit (IMU), and accelerometer are combined to determine the location and posture of the device. The virtual line layout of the underground cable is loaded and displayed through the device. This layout is generated through software simulation based on pre-established cable design data. The AR device accurately superimposes these virtual lines on the location of underground facilities in the real environment, thereby virtually obtaining the virtual layout route of the underground cable.Based on the previously preset virtual layout of underground cables, the relative position of the existing facility pipeline layout in the digital model of underground facilities in the planned area is deeply analyzed. First, the underground facility information in the planned area, including existing power pipelines, water pipes, gas pipelines, etc., is digitally modeled through the Geographic Information System (GIS) or Building Information Model (BIM). The location information of these existing facilities needs to be accurately entered through scanning, measurement and historical data. Then, based on the above information, professional geographic information processing tools are used for analysis to calculate the relative position relationship between the virtual layout of underground cables and existing pipelines, including the relative position relationship between cables and existing pipelines. The spacing, depth and intersections between the virtual cable lines and the existing pipeline layouts are analyzed further to determine the intersection distribution areas. In specific operations, the spatial analysis tool is first used to calculate the distance between the buried cables and the existing pipelines to identify the intersection areas between the two in the underground area. At this time, it is necessary to consider multiple factors such as the lateral spacing, longitudinal depth, and intersection angles between the virtual cable lines and the existing pipelines. In the 3D visualization tool, these intersections will be marked in detail through the numerical model to ensure that the position and range of the intersection area can be displayed intuitively. In the specific implementation, it is necessary to first establish a finite element model of the cable and pipeline intersection area in the computer-aided engineering (CAE) software, consider the complexity of the underground environment, set different materials, pressures, temperatures, soil friction and other factors, and use the finite element analysis method to conduct a comprehensive analysis of the stress, deformation, temperature and other aspects of the intersection area between the cable and the existing pipeline, evaluate the structural damage risk factors caused by the cable layout to the existing pipeline, and then, according to the structural damage risk factors of the intersection area between the cable virtual line and the existing pipeline layout, the crossing area is constrained by the underground pipeline crossing. During the analysis and implementation, we first use the results of finite element analysis and the spatial position relationship of the cable pipeline intersection to set the corresponding safety constraints. These constraints are based on the damage risk factors of the intersection area, such as the distance between the buried cable and the pipeline, the intersection angle, soil type, etc. The constraint relationship is established through a mathematical model to ensure that the potential damage to the intersection area can be avoided or reduced during the actual construction process. Furthermore, we use automated analysis tools to optimize the design of the planned area, adjust the layout of the buried cable line according to the intersection constraints, avoid laying the cable in areas with greater damage risks, and finally analyze and generate virtual line underground pipeline intersection constraints.

[0069] Step S3: Obtain the corresponding underground obstacle distribution and underground interference facility distribution in the planning area through the digital model of underground facilities in the planning area, and perform underground line interference evaluation and analysis on the virtual laying line of the buried cable based on the underground obstacle distribution and underground interference facility distribution in the planning area, and obtain the virtual line underground obstacle interference constraint and virtual line underground electromagnetic wave interference constraint;

[0070] In an embodiment of the present invention, a comprehensive ground and underground measurement of the planned area is performed by using laser scanning (LIDAR) and geological radar (GPR) technology to generate a high-precision three-dimensional digital model, which includes the distribution information of stratum structure, underground pipelines, obstacles (such as rock layers, bedrock, underground cavities, etc.) and power, communication and other facilities. By using professional geographic information system (GIS) software, the collected geographic data and underground facility data are imported, and the model is vectorized. By accurately calibrating the position, size and depth of the underground facilities, the distribution of underground obstacles and interference facilities is obtained. Based on the previously obtained underground obstacle distribution and interference facility distribution, the finite element method (FEM) and electromagnetic field numerical simulation technology are used to numerically simulate the influence of underground obstacles and interference facilities on the buried cable line. First, the interference of underground obstacles is simulated by software tools such as COMSOL Multiphysics. The interaction between underground obstacles (such as rocks, soil layer heterogeneity, etc.) and cable lines is accurately calculated by using three-dimensional modeling and discrete meshing technology to generate the interference distribution field of underground obstacles. The electromagnetic field simulation tool (such as Ansys HFSS) is used to simulate the electromagnetic interference of underground facilities. Taking into account the electromagnetic wave interference generated by different underground facilities (such as power lines, communication pipelines, etc.), the distribution field of underground electromagnetic interference is generated in combination with the electromagnetic field propagation characteristics. At the same time, by using the previously generated underground obstacle interference distribution field as input, combined with the underground cable laying requirements in the planning area, the interference constraint evaluation of the virtual line is carried out. First, a three-dimensional model of the virtual laying line is constructed, and the model is superimposed with the underground obstacle interference distribution field. The underground obstacle interference of each section of the line is evaluated through simulation analysis, and the finite element analysis method (FEM) is used to calculate the interference constraint, and the influence of underground obstacles on the cable line is accurately judged, especially in terms of the safety distance, depth, soil layer variation and other constraints of the cable, so as to obtain the underground obstacle interference constraint of the virtual line. Then, by using the previously generated underground electromagnetic interference distribution field, the electromagnetic wave interference constraint evaluation of the virtually laid cable line is carried out. First, the three-dimensional model of the underground cable line is superimposed with the electromagnetic interference field to analyze the impact of electromagnetic waves on the cable line, especially the cable signal attenuation and electromagnetic interference caused by electromagnetic waves. By applying electromagnetic field simulation technology, simulation software such as Ansys HFSS and CSTMicrowave Studio are used to simulate the propagation characteristics of the electromagnetic field in the underground environment, and the distribution of electromagnetic waves generated by different interference sources (such as high-voltage power lines, communication facilities, etc.) in the underground environment is calculated. Further, numerical methods (such as boundary element method, finite difference time domain method, etc.) are used to evaluate the specific impact of electromagnetic interference on the virtual line, and the electromagnetic wave interference constraint conditions are obtained, including the maximum allowable interference intensity, the impact range and the safe distance of the cable line, and finally the underground electromagnetic wave interference constraint of the virtual line is obtained.

[0071] Step S4: Based on the virtual line underground pipeline crossing constraints, the virtual line underground obstacle interference constraints and the virtual line underground electromagnetic wave interference constraints, the virtual laying line of the buried cable is subjected to constraint line feedback adjustment design to generate a buried cable line constraint feedback adjustment design scheme; according to the buried cable line constraint feedback adjustment design scheme, the virtual laying line of the buried cable is subjected to line feedback optimization planning processing to generate an underground cable laying optimization planning line.

[0072] In an embodiment of the present invention, a virtual layout route of the buried cable is preliminarily designed by combining the underground pipeline intersection constraints obtained by previous analysis, and an underground pipeline data model in a geographic information system (GIS) environment is created by using AR technology and three-dimensional modeling software, and the positions, sizes, directions and intersection relationships of all known underground pipelines are identified. Subsequently, the virtual layout route of the buried cable is loaded into the three-dimensional environment to perform pipeline intersection conflict detection. By applying computer-aided design (CAD) tools and combining the underground pipeline intersection constraint model, the intersection area of ​​the cable line and other underground pipelines is automatically detected. Based on the physical size and interference degree of the intersection area, a constraint model of the intersection area of ​​the cable layout route and the underground pipeline is generated, and the intersection area of ​​the cable layout line and the underground pipeline is automatically detected. The relative position geometric influencing factors, obstacle interference intensity values ​​and related parameters corresponding to the virtual line underground obstacle interference constraints are combined to form a suitable obstacle interference evaluation calculation formula to identify and evaluate the underground obstacle interference of the virtual laying line of the buried cable, so as to evaluate the degree of obstruction of various underground obstacles (such as building foundations, underground water pipes, stones, etc.) to the laying of cable lines. Based on the known electromagnetic wave propagation characteristics interference constraints and combined with the current parameters of the buried cable and the electromagnetic characteristics of the soil around the cable, the electromagnetic field distribution of the line is analyzed using electromagnetic field simulation tools. In this analysis, numerical methods such as finite element analysis (FEM) are used to model the electromagnetic wave propagation of the virtual laying line of the buried cable, and the electromagnetic field generated during the cable laying process is calculated. The electromagnetic interference potential distribution field is formed by the influence range of the electromagnetic waves generated on the surrounding environment. The distribution field can clearly show which areas have a high degree of electromagnetic interference. By integrating the analysis results of the previous steps, the virtual layout line of the buried cable is feedback-adjusted and designed. First, the pipeline cross-interference constraint model, obstacle interference assessment results and electromagnetic interference potential distribution field are used as input to automatically analyze the intersection points, obstacle interference points and electromagnetic interference hotspots of each layout line. Under these constraints, the path of the cable layout line will be replanned or fine-tuned to ensure that it avoids conflicts with existing underground facilities and reduces the impact of electromagnetic interference on the surrounding environment. This process can be achieved through optimization algorithms (such as genetic algorithms or simulated annealing algorithms). The method is implemented by repeatedly adjusting the path of the cable layout to find an optimal solution, so that the cable layout is the most reasonable under all interference constraints. Then, the design scheme is adjusted according to the previously generated line constraint feedback, and the virtual layout line is finally optimized by feedback planning. By reusing the electromagnetic field analysis, pipeline cross constraints and obstacle interference data, the specific direction and layout depth of the cable line are finely adjusted to ensure that the optimization plan not only meets all constraints, but also achieves the goal of minimizing costs, maximizing safety and efficiency. In the optimization planning process, the physical limitations, construction difficulties and cost factors in the layout plan are automatically processed by introducing the algorithm of engineering scheduling and resource allocation. For example,The shortest path algorithm is used to optimize the layout route, and considering the space restrictions during construction (such as road closures, feasibility of construction machinery, etc.), a detailed cable layout optimization planning route is generated. This route has fully considered all underground obstacles, electromagnetic interference, pipeline crossings and other factors, and provides a clear implementation roadmap for the construction team to ensure the smooth progress of the cable layout work, and finally optimizes the underground cable layout optimization planning route.

[0073] Further, step S1 includes the following steps:

[0074] Step S11: obtaining high-resolution surface images corresponding to the underground cable planning area through remote sensing satellites, and performing regional three-dimensional reconstruction of the surface morphology corresponding to the underground cable planning area in combination with ground laser scanning data corresponding to the underground cable planning area, so as to generate a three-dimensional reconstruction model of the surface morphology of the planning area;

[0075] Step S12: Based on the three-dimensional reconstruction model of the surface morphology of the planned area, a three-dimensional scanning of the underground terrain space of the underground cable planning area is performed using geological radar imaging technology and underground acoustic wave detection technology to obtain the three-dimensional data of the underground terrain corresponding to the underground cable planning area, including the three-dimensional data of the underground terrain potential cavities, underground terrain settlement zones and underground terrain fault zones;

[0076] Step S13: obtaining a historical underground facility pipeline layout design scheme corresponding to the underground cable planning area, and performing a facility pipeline distribution analysis on the underground cable planning area based on the historical underground facility pipeline layout design scheme to obtain underground facility pipeline distribution data corresponding to the underground cable planning area;

[0077] Step S14: Performing three-dimensional digital modeling of the underground cable planning area based on the three-dimensional underground terrain data and the underground facility pipeline distribution data to generate a digital model of the underground facilities in the planning area;

[0078] Step S15: Using augmented reality technology, the digital model of underground facilities in the planned area is superimposed and displayed on the AR mobile device.

[0079] As an embodiment of the present invention, refer to Figure 2 As shown, Figure 1 Detailed step flow diagram of step S1 in FIG. 1 , in this embodiment, step S1 includes the following steps:

[0080] Step S11: obtaining high-resolution surface images corresponding to the underground cable planning area through remote sensing satellites, and performing regional three-dimensional reconstruction of the surface morphology corresponding to the underground cable planning area in combination with ground laser scanning data corresponding to the underground cable planning area, so as to generate a three-dimensional reconstruction model of the surface morphology of the planning area;

[0081] In an embodiment of the present invention, high-resolution surface image data is obtained by utilizing remote sensing satellites to cover the geographical scope of the buried cable planning area. The satellite image should have a resolution of 30 cm or higher to ensure that the surface features are reflected clearly enough. The surface image extracted by remote sensing technology will be used to capture the spatial position and form of the terrain, buildings, roads and other surface facilities in the area. Next, the surface is three-dimensionally reconstructed in combination with the ground laser scanning data of the area. The ground laser scanning adopts LiDAR technology, which can accurately capture the details of the surface, including the ups and downs of the ground, the three-dimensional form of the building and the surrounding environmental data. After the laser scanning point cloud data is combined with the satellite image, the surface is fused and processed by computer image processing technology to generate a three-dimensional terrain model of the planning area. The three-dimensional model can accurately describe the form of the surface, and finally reconstruct a three-dimensional reconstruction model of the surface form of the planning area.

[0082] Step S12: Based on the three-dimensional reconstruction model of the surface morphology of the planned area, a three-dimensional scanning of the underground terrain space of the underground cable planning area is performed using geological radar imaging technology and underground acoustic wave detection technology to obtain the three-dimensional data of the underground terrain corresponding to the underground cable planning area, including the three-dimensional data of the underground terrain potential cavities, underground terrain settlement zones and underground terrain fault zones;

[0083] In an embodiment of the present invention, the underground of the planned area is scanned by using geological radar imaging technology to obtain spatial three-dimensional data of the underground terrain of the area. The geological radar (GPR) system can reveal the changes in the underground layers, including cavities, subsidence zones and fault zones, by emitting electromagnetic waves and receiving their reflected signals in different underground media. The process uses high-frequency radar waves, usually with a frequency of 1GHz to 2GHz, to adapt to the different soil conditions in the underground cable planning area. At the same time, underground acoustic wave detection technology is used to supplement the data of the geological radar. The propagation speed and reflection characteristics of the sound waves in different underground media can further improve the recognition accuracy of the underground terrain. The underground acoustic wave detection technology can penetrate into the soil layer of tens of meters or even deeper, and detect potential underground cavities, subsidence zones and fault zones. Hidden dangers, finally obtain the underground terrain three-dimensional data corresponding to the underground cable planning area, including three-dimensional data corresponding to potential cavities, subsidence zones and fault zones of the underground terrain.

[0084] Step S13: obtaining a historical underground facility pipeline layout design scheme corresponding to the underground cable planning area, and performing a facility pipeline distribution analysis on the underground cable planning area based on the historical underground facility pipeline layout design scheme to obtain underground facility pipeline distribution data corresponding to the underground cable planning area;

[0085] In an embodiment of the present invention, by consulting the historical planning drawings and underground facility archives provided by the relevant government or construction unit, the past or existing underground pipeline layout data of the area is extracted. These data usually include the specific location, depth and layout form of water pipes, power pipelines, communication pipelines, gas pipelines, etc. At the same time, based on the acquired historical underground facility pipeline layout data, a professional geographic information system (GIS) is used to perform pipeline distribution analysis. The GIS system can process spatial data, analyze the relative positions between pipelines and the intersection or overlap relationship with other underground facilities, and evaluate the impact of these pipeline layouts on the new underground cable planning. Through this analysis, an accurate underground facility pipeline distribution data can be obtained, and finally the underground facility pipeline distribution data corresponding to the underground cable planning area can be obtained.

[0086] Step S14: Performing three-dimensional digital modeling of the underground cable planning area based on the three-dimensional underground terrain data and the underground facility pipeline distribution data to generate a digital model of the underground facilities in the planning area;

[0087] In an embodiment of the present invention, three-dimensional digital modeling is performed by combining the three-dimensional underground terrain data and the underground facility pipeline distribution data obtained in the previous steps. First, the three-dimensional data of the underground terrain and the facility pipeline distribution data are imported into the modeling software, such as Autodesk Revit or Bentley MicroStation, for integration and modeling. The modeling process requires the three-dimensional terrain information obtained by geological radar and underground acoustic wave detection to be converted into a digital three-dimensional grid, and then integrated with the historical facility pipeline distribution data to form an integrated three-dimensional model of underground facilities. The model needs to ensure that the precise position, depth, direction and mutual relationship of all pipelines are clearly expressed. When modeling, the different soil types, structures and various obstacles of the underground space should also be considered, and finally a digital model of the underground facilities in the planned area is generated.

[0088] Step S15: Using augmented reality technology, the digital model of underground facilities in the planned area is superimposed and displayed on the AR mobile device.

[0089] In an embodiment of the present invention, the digital model of underground facilities is superimposed on a mobile device for display by utilizing augmented reality (AR) technology. Specifically, an AR device (such as an AR-enabled smartphone or AR glasses) is used to capture the surface image of the planned area through a real-time camera, and the digital model of the underground facilities is virtually superimposed through software. The AR system adjusts the position and angle of the model in real time according to the viewing angle of the real-time camera, so that the user can see the virtual display of the underground facilities in the actual environment, and ensures the accurate position and scale of the underground facility model through positioning technology (such as GPS, inertial measurement unit, visual calibration, etc.). The user can interact on the AR device through a touch screen or voice commands to view detailed information of the underground facilities, and can simulate operations such as cable laying and facility repair to intuitively understand the complex situation of the underground space. This display method will greatly improve the work efficiency of planners, construction personnel, and maintenance personnel, and optimize the planning and management of underground cable lines.

[0090] Further, step S14 includes the following steps:

[0091] Step S141: Preliminary fusion of the underground terrain space of the underground cable planning area based on the underground terrain three-dimensional data to generate a preliminary three-dimensional framework model of the underground terrain space of the planning area;

[0092] Step S142: Detailed analysis of the underground facility pipeline distribution data is performed to obtain detailed distribution of underground facility pipelines in the planned area, including the direction, buried depth and interlaced relationship of various underground facility pipelines;

[0093] Step S143: Based on the detailed distribution of underground facilities and pipelines in the planning area, a preliminary three-dimensional framework model of the underground terrain space in the planning area is subjected to three-dimensional pipeline mapping digital modeling to generate a digital model of underground facilities in the planning area.

[0094] As an embodiment of the present invention, refer to Figure 3 As shown, Figure 2 Detailed step flow diagram of step S14 in the embodiment, step S14 includes the following steps:

[0095] Step S141: Preliminary fusion of the underground terrain space of the underground cable planning area based on the underground terrain three-dimensional data to generate a preliminary three-dimensional framework model of the underground terrain space of the planning area;

[0096] In an embodiment of the present invention, high-precision three-dimensional point cloud data of the underground terrain is obtained by ground laser scanning technology (such as LiDAR), and a preliminary framework model of the underground terrain space is constructed by combining geological exploration data, drilling data and soil layer distribution information. These terrain data are spatially aligned and fused through dedicated underground space data processing software (such as Autodesk Revit, BentleyMicroStation, etc.) to form a three-dimensional terrain model that includes the characteristics of each underground layer of soil and obstacles (such as rock layers, groundwater levels, etc.). The model can accurately reflect the undulations of the underground terrain, soil structure and potential obstacle distribution in the planning area. The generated preliminary three-dimensional framework model can display the overall structure of the underground terrain, and finally a preliminary three-dimensional framework model of the underground terrain space in the planning area is obtained.

[0097] Step S142: Detailed analysis of the underground facility pipeline distribution data is performed to obtain detailed distribution of underground facility pipelines in the planned area, including the direction, buried depth and interlaced relationship of various underground facility pipelines;

[0098] In an embodiment of the present invention, an on-site pipeline scan is performed through underground pipeline detection technology (such as ground penetrating radar (GPR), electromagnetic wave detection, etc.) to obtain the precise location and burial depth data of all known and potential underground pipelines in the planning area. These data are connected to the existing urban infrastructure database through a GIS platform (such as ArcGIS, QGIS, etc.) to further refine the specific information of various underground facility pipelines, especially the need to accurately mark the direction, burial depth, interlacing relationship and overlap of various pipelines. In this process, the direction of the pipeline is accurately located through a geographic coordinate system (such as WGS84 or UTM coordinate system), and the burial depth data is verified and adjusted through an underground pipeline profile. Through efficient data analysis and processing, a detailed distribution map of underground facility pipelines in the planning area is generated to ensure that potential conflicts such as interlacing and overlapping between various underground facilities (such as water pipes, gas pipes, communication cables, etc.) can be clearly identified, and finally a detailed distribution of underground facility pipelines in the planning area is obtained.

[0099] Step S143: Based on the detailed distribution of underground facilities and pipelines in the planning area, a preliminary three-dimensional framework model of the underground terrain space in the planning area is subjected to three-dimensional pipeline mapping digital modeling to generate a digital model of underground facilities in the planning area.

[0100] In an embodiment of the present invention, by utilizing the previously acquired detailed distribution information of underground facility pipelines, it is accurately mapped to the generated three-dimensional framework model of underground terrain space. This process embeds the direction, burial depth and interlaced relationship of the pipeline into the three-dimensional framework of the underground terrain through three-dimensional modeling software (such as Autodesk Civil 3D, Bentley OpenRoads, etc.). The specific operation is to import the coordinate data of various pipelines into the three-dimensional modeling platform, and then accurately locate the pipeline to the corresponding depth level underground according to the specific burial depth data of the pipeline. On this basis, the pipeline modeling tool is used for three-dimensional digital modeling to construct the spatial layout of the underground pipelines in the planning area. The digital model not only includes the spatial positions of various underground facilities, but also presents their interlaced relationships, corresponding interference areas and other information in a visual manner, ensuring that the cable planning can be accurately and safely laid on the basis of existing facilities, and finally generating a digital model of the underground facilities in the planning area.

[0101] Further, step S2 includes the following steps:

[0102] Step S21: obtaining a corresponding underground cable virtual layout line through an AR mobile device;

[0103] In an embodiment of the present invention, augmented reality (AR) technology is used to obtain a virtual layout line of an underground cable through an AR mobile device. In specific implementation, the target area is scanned in real time by the camera of the AR device, and the data of sensors such as GPS positioning, inertial measurement unit (IMU), and accelerometer are combined to determine the location and posture of the device. The virtual line layout of the underground cable is loaded and displayed through the device. This layout is generated through software simulation based on pre-established cable design data. The AR device accurately superimposes these virtual lines on the underground facility positions in the real environment, thereby realizing the precise connection between the virtual cable layout line and the real environment. During the implementation process, the AR system will use precise spatial positioning and environmental perception technology to update the virtual cable line in the display area in real time, so that the layout position of the cable line is displayed synchronously with the underground facility layout of the planned area, and finally the virtual underground cable virtual layout line is obtained.

[0104] Step S22: Based on the virtual layout of the buried cable, an in-depth relative position analysis is performed on the corresponding existing facility pipeline layout in the digital model of the underground facilities in the planned area to obtain the relative position relationship between the cable virtual line and the existing pipeline layout, including the spacing, depth and intersection between the cable and the existing pipeline;

[0105] In an embodiment of the present invention, an in-depth analysis of the relative position of the existing facility pipeline layout in the digital model of the underground facilities in the planned area is performed based on the previously preset virtual laying line of the buried cable. First, the underground facility information of the planned area, including the existing power pipelines, water pipes, gas pipelines, etc., is digitally modeled through a geographic information system (GIS) or a building information model (BIM). The location information of these existing facilities needs to be accurately entered through scanning, measurement and historical data. Then, based on the above information, professional geographic information processing tools are used for analysis to calculate the relative position relationship between the virtual laying line of the buried cable and the existing pipelines. Through geometric calculation and spatial analysis, the spacing, depth and intersection between the cable and the existing pipelines are determined, and finally the relative position relationship between the virtual cable line and the existing pipeline layout is obtained.

[0106] Step S23: Based on the spacing, depth and intersection between the cable and the existing pipeline, the virtual layout line of the buried cable and the corresponding existing facility pipeline layout in the digital model of the underground facilities in the planned area are determined to obtain the intersection distribution area between the virtual cable line and the existing pipeline layout;

[0107] In an embodiment of the present invention, the relative position relationship between the cable virtual line and the existing pipeline layout is further analyzed to determine the intersection distribution area. In the specific operation, the distance between the buried cable and the existing pipeline is first calculated using a spatial analysis tool to identify the intersection area between the two in the underground area. At this time, it is necessary to consider multiple factors such as the lateral spacing, longitudinal depth, and intersection angle between the cable virtual line and the existing pipeline. In the three-dimensional visualization tool, these intersections will be marked in detail through a numerical model to ensure that the position and range of the intersection area can be displayed intuitively. At the same time, through model comparison, the precise area where the cable line and the existing pipeline intersect is further calculated, and the precise position of the intersection is marked. This process not only determines the intersection area through a mathematical model, but also simulates the impact of the intersection of cables and pipelines under different circumstances through the intersection analysis software, and provides a distribution map of the intersection area between the cable virtual line and the existing pipeline layout, and finally obtains the intersection distribution area between the cable virtual line and the existing pipeline layout.

[0108] Step S24: performing a finite element cross structural damage assessment on the cross distribution area between the cable virtual line and the existing pipeline layout to generate a structural damage risk factor for the cross area between the cable virtual line and the existing pipeline layout;

[0109] In an embodiment of the present invention, a finite element cross-structure damage assessment is performed based on the cross-region information between the cable and the existing pipeline. In specific implementation, it is first necessary to establish a finite element model of the cross-region of the cable and the pipeline in a computer-aided engineering (CAE) software, consider the complexity of the underground environment, set different materials, pressures, temperatures, soil friction and other factors, and use the finite element analysis method to perform a comprehensive analysis of the stress, deformation, temperature and other aspects of the cross-region between the cable and the existing pipeline, and evaluate the impact of the cable layout on the existing pipeline. This process includes simulating the deformation of the cable and the pipeline under different external forces, especially the local structural damage caused when the two cross. Through the analysis of the finite element model, the structural damage risk factor of the cross-region between the cable virtual line and the existing pipeline is calculated. The factor is a risk assessment value obtained based on multiple factors such as different load conditions, pipeline materials, and cross-region methods. Finally, the structural damage risk factor of the cross-region between the cable virtual line and the existing pipeline layout is generated.

[0110] Step S25: performing underground pipeline crossing constraint analysis on the crossing distribution area between the virtual cable line and the existing pipeline layout based on the structural damage risk factor of the crossing area between the virtual cable line and the existing pipeline layout to generate virtual line underground pipeline crossing constraints.

[0111] In an embodiment of the present invention, an underground pipeline intersection constraint analysis is performed on the intersection area according to the structural damage risk factor of the intersection area between the cable virtual line and the existing pipeline layout. During implementation, the corresponding safety constraints are first set using the results of the finite element analysis and the spatial position relationship of the cable pipeline intersection. These constraints are based on the damage risk factors of the intersection area, such as the distance between the buried cable and the pipeline, the intersection angle, the soil type, etc. The constraint relationship is established through a mathematical model to ensure that the potential damage of the intersection area can be avoided or reduced during the actual construction process. Furthermore, the planned area is optimized and designed using an automated analysis tool, and the layout of the buried cable line is adjusted according to the intersection constraint conditions to avoid laying the cable in an area with a greater risk of damage. Finally, the virtual line underground pipeline intersection constraints are analyzed and generated.

[0112] Further, step S23 includes the following steps:

[0113] Step S231: performing spatial geometric constraint analysis on the virtual laying line of the buried cable and the corresponding existing facility pipeline layout in the digital model of underground facilities in the planned area based on the spacing and depth between the cable and the existing pipeline, so as to generate a spatial geometric layout constraint relationship between the virtual cable line and the existing pipeline layout;

[0114] In an embodiment of the present invention, a detailed analysis is performed on the spatial geometric relationship between the cable and the existing pipelines. To this end, a digital model of the underground facilities is first obtained, including the layout data of the buried cable lines and all the existing pipelines. The digital model is obtained by means of laser scanning or drilling, and is specific to the actual position, depth and size of the pipelines and cables. The model is used to accurately calculate the spacing and depth between the cable and the existing pipelines through a spatial geometric analysis tool to ensure that the cable layout will not physically conflict with the existing pipelines. For each cable line, the spacing and burial depth between the cable and the surrounding facilities are calculated and analyzed through tools such as CAD, BIM or GIS. The existing pipelines are subjected to geometric constraint analysis. Specifically, the digital model of underground facilities is rendered in real time on the AR platform by utilizing the three-dimensional spatial positioning system. Combined with the layout information of the virtual cable line, real-time spatial geometric constraints are imposed on it and the existing pipeline layout. In this process, the constraint solving algorithm is used to automatically identify the relative position between the cable and the pipeline. Through geometric relationship calculations, the distance and burial depth between the cable line and the existing pipeline are ensured to meet the planning standards, and a visual constraint relationship is formed. The spatial geometric constraint relationship data between the virtual cable layout line and the existing pipeline layout is output, and finally the spatial geometric layout constraint relationship between the virtual cable line and the existing pipeline layout is obtained.

[0115] Step S232: Calculate the minimum safety boundary area of ​​the intersection between the cable virtual line and the existing pipeline layout based on the spatial geometric layout constraint relationship between the cable virtual line and the existing pipeline layout to obtain the minimum safety boundary area of ​​the intersection position between the cable virtual line and the existing pipeline layout;

[0116] In an embodiment of the present invention, after obtaining the spatial geometric constraint relationship between the cable and the existing pipeline, the next task is to calculate the minimum safety boundary area of ​​the intersection of the cable and the pipeline. At this time, the minimum safety boundary is determined by calculating the distance between the cable and the intersection of the existing pipeline layout. In the specific implementation process, a geographic information system (GIS) or a spatial analysis tool is used to identify the intersection of the buried cable line and the existing pipeline, and a minimum safety boundary is set based on the safety specifications of the cable line. The boundary is usually determined by the protection requirements of the cable itself and its impact on the surrounding pipelines. For example, a safety distance of at least 1 meter should be maintained when the cable and the pipeline cross. The calculation process relies on the real-time three-dimensional visualization function supported by AR technology, and the intersection area and its minimum safety boundary are displayed through a virtual reality model. When performing spatial geometric calculations, a rule-based algorithm is used to automatically identify the intersection position of the cable and the pipeline, and based on this, the minimum safety boundary area of ​​the intersection is calculated, thereby outputting the minimum safety boundary area of ​​the intersection position of the cable and the existing pipeline, and marking it on the digital model, and finally obtaining the minimum safety boundary area of ​​the intersection position between the cable virtual line and the existing pipeline layout.

[0117] Step S233: Determine the intersection area of ​​the virtual laying line of the buried cable and the corresponding existing facility pipeline layout in the digital model of the underground facilities in the planned area according to the minimum safe boundary area of ​​the intersection position between the virtual cable line and the existing pipeline layout, and obtain the intersection distribution area between the virtual cable line and the existing pipeline layout.

[0118] In the embodiment of the present invention, after obtaining the minimum safe boundary area of ​​the intersection position between the cable virtual line and the existing pipeline layout, the next step is to determine the intersection area to ensure that the conflict area is avoided when planning the cable layout. In this process, through spatial analysis and geometric constraint analysis, combined with the aforementioned minimum safe boundary area, further analysis and determination of the intersection area are performed. In specific implementation, AR technology and digital three-dimensional modeling tools are used to mark the intersection point and the surrounding area of ​​the cable virtual line and the existing pipeline, and the intersection area is highlighted. In this process, the intersection area of ​​the cable and the pipeline is further analyzed and marked as the intersection area. Distribution area, in order to clarify which areas are the "restricted areas" for cable laying. This operation requires the comprehensive use of the spatial relationship model in the geographic information system (GIS) to further refine the intersection area through geometric constraint operations. For example, based on the relative orientation, distance and intersection position between the cable line and the pipeline, the intersection area is optimized and adjusted to avoid the intersection of cables and pipelines in places that do not meet safety standards. The determination of the intersection area is based on the specific requirements of spatial calculation and minimum safety boundaries to ensure that the intersection distribution area between the virtual cable laying line and the existing pipeline layout is clear and definite, and finally the intersection distribution area between the virtual cable line and the existing pipeline layout is obtained.

[0119] Further, step S24 includes the following steps:

[0120] Step S241: performing finite element partitioning modeling on the intersection distribution area between the cable virtual line and the existing pipeline layout to generate a finite element sub-model of the intersection area between each cable and the existing pipeline;

[0121] In an embodiment of the present invention, layout data of the virtual cable line and the existing pipeline are obtained by digital means. These data are obtained by high-precision measurement equipment (such as a laser scanner or a geographic information system (GIS)) to ensure the accurate position and depth information of the ground or underground pipeline. Based on these data, a finite element analysis (FEA) software (such as ANSYS, Abaqus or COMSOL Multiphysics) is used to create a three-dimensional model of the intersection area. The model divides the finite element grid at the intersection area of ​​the virtual cable line and the existing pipeline, and refines the regional grid density to capture the stress and deformation at the intersection of the cable and the pipeline. To ensure the modeling accuracy, the model needs to be refined to a tiny area at the interface between the cable and the pipeline, especially in the key area where the cable and the pipeline intersect. According to the physical properties of the actual soil and materials, the grid is locally refined to ensure that its mechanical behavior can be accurately reflected in the subsequent simulation. In this process, data such as the material of the pipeline, the size of the pipeline, and the electrical and mechanical characteristics of the cable need to be accurately input into the finite element model to ensure the accurate modeling of each physical property, and finally generate a finite element sub-model of the intersection area between each cable and the existing pipeline.

[0122] Step S242: Perform stress and deformation simulation analysis on the finite element sub-model of the intersection area between each cable and the existing pipeline by introducing a preset geomechanical model to generate the cable pipeline stress distribution, cable pipeline deformation component and cable pipeline structural mechanics interference factor corresponding to the finite element of each intersection area;

[0123] In an embodiment of the present invention, after the finite element model is established, a preset geomechanical model is introduced to perform stress and deformation simulation analysis on the intersection area. The geomechanical model usually includes different layers of underground soil and the physical and mechanical properties of the soil, such as elastic modulus, Poisson's ratio, compressive strength, etc. These parameters need to be obtained from geological exploration data or soil test reports at the engineering site, and static or dynamic loading simulation is performed by using finite element analysis software (such as ANSYS, Abaqus, etc.), considering the influence of external loads (such as traffic loads, construction loads, etc.) on the intersection area. During the simulation, the influence of environmental factors such as groundwater level, soil settlement, and temperature change should be added, and then the stress, deformation distribution and structural mechanics interference factor of each cable and pipeline intersection area are generated. The factor can reflect the stress concentration effect and local deformation caused by the intersection, and through these simulation results, the contact stress, relative displacement, internal force distribution and other data between the cable and the pipeline can be obtained. These results will provide basic data for further analysis of the damage and deformation of the intersection area, and finally obtain the cable pipeline stress distribution, cable pipeline deformation component and cable pipeline structural mechanics interference factor corresponding to the finite element of each intersection area.

[0124] Step S243: Based on the cable pipeline stress distribution corresponding to the finite elements of each intersection area, the cable pipeline deformation component and the cable pipeline structural mechanics interference factor, a structural damage assessment calculation formula is used to perform a structural damage assessment calculation on the intersection area finite element sub-model between each cable and the existing pipeline to generate a structural damage risk factor for the intersection area between the cable virtual line and the existing pipeline layout.

[0125] In an embodiment of the present invention, a structural damage assessment is performed on each intersection area by using a cross-structure damage assessment calculation formula based on the stress distribution, deformation component and structural mechanics interference factor obtained by previous analysis. In this process, it is first necessary to establish a damage assessment model for the intersection area based on the design standards of cables and pipelines, material properties, stress-strain relationship in the intersection area, influence of soil media, etc. The model usually combines empirical formulas, failure criteria (such as Von Mises criteria) and material fatigue theory for evaluation and calculation. In this calculation, key evaluation indicators include but are not limited to the spatial coordinates of the intersection area, stress distribution of cables and pipelines, stress structure damage adjustment factors, deformation components of cables and pipelines, structural mechanics interference factors of cables and pipelines, deformation structure damage adjustment factors, etc. By inputting a calculation formula (such as a fatigue damage accumulation model or a structural damage prediction model), the damage risk factor of the area is obtained. The evaluation result can provide the damage risk of each intersection area, and finally generate a structural damage risk factor for the intersection area between the cable virtual line and the existing pipeline layout.

[0126] Furthermore, the calculation formula for the cross structure damage assessment in step S243 is specifically:

[0127]

[0128] Where R is the structural damage risk factor of the intersection area between the cable virtual line and the existing pipeline layout, Ω is the intersection three-dimensional space area between the cable and the existing pipeline, x is the spatial coordinate of the intersection area, n is the total number of finite elements in the intersection area, σ i (x) is the stress distribution of the cable pipeline corresponding to the finite element of the i-th intersection area at the spatial coordinate x, α i is the stress structure damage adjustment factor corresponding to the finite element of the i-th intersection area, ε i (x) is the cable pipeline deformation component corresponding to the finite element of the i-th intersection area at the spatial coordinate x, κ i (x) is the cable pipeline structural mechanics interference factor corresponding to the finite element of the i-th intersection area at the spatial coordinate x, β i is the deformation structure damage adjustment factor corresponding to the finite element of the i-th intersection area, and η is the correction coefficient of the structural damage risk factor of the intersection area.

[0129] The present invention obtains a cross structure damage assessment calculation formula by using a specific mathematical model and after verification, which is used to perform structural damage assessment calculation on the finite element sub-model of the intersection area between each cable and the existing pipeline. The cross structure damage assessment calculation formula can comprehensively analyze the overall structure of the intersection area between the cable and the existing pipeline by incorporating multiple influencing factors (such as stress distribution, deformation component and interference factor) into the comprehensive calculation. These factors include stress distribution, which reflects the stress state of the intersection area between the cable and the pipeline, and is directly related to the stress condition of the area; the deformation component represents the degree of deformation of the structure, which has an important impact on the stability and long-term service life of the structure; and the interference factor quantifies the structural mechanics interference between the cable and the pipeline, which helps to identify potential weaknesses and risk points. This multi-level and multi-dimensional analysis method makes the structural damage assessment of the intersection area more accurate and comprehensive. In the formula, the stress, deformation and interference factor of the intersection area are spatially weighted by integration, which can finely capture the specific performance of each finite element unit at different spatial positions. This processing method means that the differences in different positions, different materials or stress conditions can be fully considered in the calculation, avoiding the accuracy loss caused by global averaging. Secondly, the damage adjustment factor in the formula allows weighted adjustment of stresses and deformations of different regions and types according to actual conditions. These factors can be adjusted according to specific material properties, environmental factors, construction quality, etc., so that the evaluation results are more in line with the actual situation. Through the introduction of these adjustment factors, the evaluation calculation formula can be more flexible to adapt to different actual conditions, improving the accuracy of the evaluation results. In addition, the introduction of the correction factor plays a role in global correction. This coefficient can be adjusted according to the specific requirements of the project or changes in the external environment, thereby optimizing the results of risk assessment. If there are new environmental load factors (such as water level changes, climate change, etc.) that need to be considered, appropriate adjustments can be made to ensure that the evaluation results are more in line with actual working conditions. In summary, the formula fully considers the structural damage risk factor R of the intersection area between the cable virtual line and the existing pipeline layout, the intersection three-dimensional space area Ω between the cable and the existing pipeline, the spatial coordinate x of the intersection area, the total number of finite elements in the intersection area n, and the cable pipeline stress distribution σ corresponding to the i-th intersection area finite element at the spatial coordinate x. i (x), stress structure damage adjustment factor α corresponding to the finite element of the i-th intersection area i , the cable pipeline deformation component ε corresponding to the finite element of the i-th intersection area at the spatial coordinate x i (x), the cable pipeline structural mechanics interference factor κ corresponding to the finite element of the i-th intersection area at the spatial coordinate x i (x), the deformation structure damage adjustment factor β corresponding to the finite element of the i-th intersection area i, the correction coefficient η of the cross-region structural damage risk factor, according to the correlation between the cross-region structural damage risk factor R between the cable virtual line and the existing pipeline layout and the above parameters, constitutes a functional relationship This formula can realize the structural damage assessment calculation process of the finite element sub-model of the intersection area between each cable and the existing pipeline. At the same time, by introducing the correction coefficient η of the structural damage risk factor of the intersection area, it can be adjusted according to the errors occurring in the calculation process, thereby improving the accuracy and applicability of the calculation formula for the intersection structure damage assessment.

[0130] Further, step S3 includes the following steps:

[0131] Step S31: obtaining the corresponding underground obstacle distribution and underground interference facility distribution in the planning area through the digital model of underground facilities in the planning area;

[0132] In an embodiment of the present invention, a comprehensive ground and underground measurement of the planned area is carried out by using laser scanning (LIDAR) and geological radar (GPR) technology to generate a high-precision three-dimensional digital model, which includes the distribution information of the stratum structure, underground pipelines, obstacles (such as rock formations, bedrock, underground cavities, etc.) and power, communication and other facilities. By using professional geographic information system (GIS) software, the collected geographic data and underground facility data are imported, and the model is vectorized. By accurately calibrating the position, size and depth of the underground facilities, the distribution of underground obstacles and interference facilities is obtained. This information will be used as the basic data in subsequent steps to simulate and analyze the impact of the underground environment on the layout of buried cable lines, and finally the distribution of underground obstacles in the planned area and the distribution of underground interference facilities in the planned area are obtained.

[0133] Step S32: performing underground line interference numerical simulation on the underground obstacle distribution in the planning area and the underground interference facility distribution in the planning area respectively, so as to generate the underground obstacle interference distribution field in the planning area and the underground facility electromagnetic interference distribution field in the planning area;

[0134] In an embodiment of the present invention, based on the previously acquired underground obstacle distribution and interference facility distribution, the finite element method (FEM) and electromagnetic field numerical simulation technology are used to numerically simulate the influence of underground obstacles and interference facilities on the buried cable line. First, the underground obstacle interference simulation is performed by software tools such as COMSOL Multiphysics, and the interaction between underground obstacles (such as rocks, soil layer heterogeneity, etc.) and cable lines is accurately calculated by using three-dimensional modeling and discrete meshing technology to generate an interference distribution field of underground obstacles. Electromagnetic interference of underground facilities is simulated by using electromagnetic field simulation tools (such as Ansys HFSS). Taking into account the electromagnetic wave interference generated by different underground facilities (such as power lines, communication pipelines, etc.), combined with the electromagnetic field propagation characteristics, the distribution field of underground electromagnetic interference is generated. The specific interference conditions of various obstacles and facilities in the planning area on the underground cable line layout can be accurately obtained, and finally the underground obstacle interference distribution field and the underground facility electromagnetic interference distribution field in the planning area are generated.

[0135] Step S33: performing underground obstacle interference constraint evaluation and analysis on the virtual laying line of the buried cable based on the underground obstacle interference distribution field in the planned area to obtain the underground obstacle interference constraint of the virtual line;

[0136] In an embodiment of the present invention, by using the previously generated underground obstacle interference distribution field as input and combining the underground cable laying requirements of the planning area, the interference constraint evaluation of the virtual line is performed. First, a three-dimensional model of the virtual laying line is constructed, and the model is superimposed with the underground obstacle interference distribution field. The underground obstacle interference of each section of the line is evaluated through simulation analysis, and the finite element analysis method (FEM) is used to calculate the interference constraint, and the influence of underground obstacles on the cable line is accurately judged, especially in terms of the safety distance, depth, soil layer variation and other constraints of the cable. These analysis results are used to optimize the line laying plan to ensure that the cable laying is not excessively interfered, thereby reducing potential engineering risks. The virtual line interference constraint data obtained by evaluation will provide specific decision support to ensure the feasibility and safety of line planning, and finally obtain the virtual line underground obstacle interference constraint.

[0137] Step S34: performing underground electromagnetic wave interference constraint evaluation and analysis on the virtual layout line of the buried cable based on the electromagnetic interference distribution field of the underground facilities in the planned area, and obtaining the underground electromagnetic wave interference constraint of the virtual line.

[0138] In an embodiment of the present invention, by utilizing the previously generated underground electromagnetic interference distribution field, the electromagnetic wave interference constraint evaluation is performed on the virtually laid cable line. First, the three-dimensional model of the underground cable line is superimposed with the electromagnetic interference field to analyze the impact of electromagnetic waves on the cable line, especially the cable signal attenuation and electromagnetic interference caused by electromagnetic waves. By applying electromagnetic field simulation technology, simulation software such as Ansys HFSS and CST Microwave Studio are used to simulate the propagation characteristics of the electromagnetic field in the underground environment, and the distribution of electromagnetic waves generated by different interference sources (such as high-voltage power lines, communication facilities, etc.) in the underground environment is calculated. The specific impact of electromagnetic interference on the virtual line is further evaluated by numerical methods (such as boundary element method, finite difference time domain method, etc.), and electromagnetic wave interference constraint conditions are obtained, including the maximum allowable interference intensity, the impact range and the safe distance of the cable line, etc., to ensure that the line layout can effectively reduce the risk of electromagnetic interference under the premise of meeting the electromagnetic compatibility requirements, and finally obtain the virtual line underground electromagnetic wave interference constraint.

[0139] Further, step S4 includes the following steps:

[0140] Step S41: performing pipeline intersection conflict detection and analysis on the underground cable virtual layout line based on the underground pipeline intersection constraint of the virtual line, and obtaining the underground cable layout pipeline intersection interference constraint model, which describes the pipeline intersection area and its influence range that need to be avoided during the underground cable line layout process;

[0141] In an embodiment of the present invention, a virtual layout line of the buried cable is preliminarily designed by combining the underground pipeline crossing constraints obtained by previous analysis, and an underground pipeline data model in a geographic information system (GIS) environment is created by using AR technology and three-dimensional modeling software, and the location, size, direction and intersection relationship of all known underground pipelines are identified. Subsequently, the virtual layout line of the buried cable is loaded into the three-dimensional environment to perform pipeline crossing conflict detection. By applying a computer-aided design (CAD) tool and combining the underground pipeline crossing constraint model, the intersection area of ​​the cable line and other underground pipelines is automatically detected. During the detection process, by setting the parameters of the pipeline crossing safety distance and the pipeline type, the points where the cable intersects with the other pipelines are identified, and the influence range of each intersection is calculated. The conflict analysis algorithm generates a constraint model of the intersection area of ​​the cable layout line and the underground pipeline based on the physical size and interference degree of the intersection area, and clearly identifies the area to be avoided or redirected. This model provides preliminary restriction conditions for subsequent layout plans, ensuring that there is no situation in which the cable cannot be crossed or affects the safe operation of other pipelines during the cable layout process, and finally a pipeline crossing interference constraint model for the buried cable layout is obtained.

[0142] Step S42: Based on the virtual line underground obstacle interference constraint, use the pipeline laying obstacle interference evaluation calculation formula to identify and evaluate the underground obstacle interference of the underground cable virtual laying line, and obtain the degree of interference obstruction of the underground cable laying pipeline obstacle;

[0143] In an embodiment of the present invention, a suitable pipeline obstacle interference evaluation calculation formula is formed by combining the laying length corresponding to the virtual laying line of the buried cable, the laying distance position parameters, the quantity parameters of the underground obstacle interference constraints of the virtual line, the relative position geometric influence factors corresponding to the underground obstacle interference constraints of the virtual line, the obstacle interference intensity value and related parameters to identify and evaluate the underground obstacle interference of the virtual laying line of the buried cable, so as to evaluate the degree of obstruction of various underground obstacles (such as building foundations, underground water pipes, stones, etc.) to the laying of cable lines, and finally obtain the degree of obstruction of the underground cable laying pipeline obstacles.

[0144] Step S43: performing electromagnetic field distribution analysis on the virtual underground cable layout line based on the underground electromagnetic wave interference constraint of the virtual line to obtain the electromagnetic field interference distribution of the underground cable layout pipeline; performing electromagnetic field interference potential assessment analysis on the corresponding virtual underground cable layout line based on the electromagnetic field interference distribution of the underground cable layout pipeline to generate the electromagnetic interference potential distribution field of the underground cable layout pipeline;

[0145] In an embodiment of the present invention, an electromagnetic field distribution analysis of the line is performed using an electromagnetic field simulation tool based on interference constraints based on known electromagnetic wave propagation characteristics and in combination with current parameters of the buried cable and electromagnetic characteristics of the soil around the cable. In the analysis, numerical methods such as finite element analysis (FEM) are used to model the electromagnetic wave propagation of the virtual laying line of the buried cable, and the impact range of the electromagnetic waves generated during the cable laying process on the surrounding environment is calculated. During the simulation process, the electromagnetic field intensity distribution of the buried cable line is calculated based on factors such as the current strength and frequency of the cable and the conductivity and dielectric constant of the soil, and the potential area of ​​electromagnetic interference is determined based on the distribution. After processing, these data will be used to identify sensitive equipment or other pipelines affected by electromagnetic interference, thereby forming an electromagnetic interference potential distribution field, which can clearly show which areas have a high degree of electromagnetic interference, and finally generate an electromagnetic interference potential distribution field of the buried cable laying pipeline.

[0146] Step S44: Based on the underground cable laying pipeline cross interference constraint model, the interference obstruction degree of the underground cable laying pipeline obstacles and the underground cable laying pipeline electromagnetic interference potential distribution field, the underground cable laying pipeline virtual laying line is subjected to constraint line feedback adjustment design to generate an underground cable line constraint feedback adjustment design scheme;

[0147] In an embodiment of the present invention, by integrating the analysis results of the previous steps, the virtual laying route of the buried cable is feedback-adjusted and designed. First, the pipeline cross-interference constraint model, the obstacle interference assessment results and the electromagnetic interference potential distribution field are used as inputs to automatically analyze the intersection points, obstacle interference points and electromagnetic interference hotspots of each laying route. Under these constraints, the path of the cable laying route will be replanned or fine-tuned to ensure that conflicts with existing underground facilities are avoided and the impact of electromagnetic interference on the surrounding environment is reduced. This process can be achieved through an optimization algorithm (such as a genetic algorithm or a simulated annealing algorithm). By repeatedly adjusting the path of the laying line, an optimal solution is found so that the cable laying scheme that meets all interference constraints is the most reasonable. The path can also be iteratively optimized according to the set objective function (such as minimizing total interference or minimizing laying cost) to ensure the efficiency and feasibility of the cable line laying, and finally a constraint feedback adjustment design scheme for the buried cable line is designed and generated.

[0148] Step S45: performing line feedback optimization planning processing on the underground cable virtual layout line according to the underground cable line constraint feedback adjustment design scheme to generate an underground cable layout optimization planning line.

[0149] In an embodiment of the present invention, by adjusting the design scheme based on the previously generated feedback of the buried cable line constraints, the virtual layout line will be finally feedback optimized and planned, so as to finely adjust the specific direction and layout depth of the cable line by reusing the electromagnetic field analysis, pipeline crossing constraints and obstacle interference data, so as to ensure that the optimization scheme not only meets all constraints, but also achieves the goals of minimizing costs, maximizing safety and efficiency. In the optimization planning process, by introducing the algorithm of engineering scheduling and resource allocation, the physical limitations, construction difficulties and cost factors appearing in the layout plan are automatically processed. For example, the layout route is optimized by the shortest path algorithm, and the space limitations in the construction (such as road closures, feasibility of construction machinery, etc.) are considered to generate a detailed cable layout optimization planning route, which has fully considered all underground obstacles, electromagnetic interference and pipeline crossing factors, and provides a clear implementation roadmap for the construction team to ensure the smooth progress of the cable laying work, and finally optimizes and generates the buried cable layout optimization planning route.

[0150] Furthermore, the calculation formula for evaluating the interference of obstacles in laying pipelines in step S42 is specifically:

[0151]

[0152] In the formula, I to is the interference degree of obstacles in underground cable laying pipelines, L is the total length of the virtual laying line of the underground cable, x ′is the distance location parameter of the virtual line layout, m is the total number of underground obstacle interference constraints of the virtual line, and f j (x ′ ) is the jth virtual line underground obstacle interference constraint at distance position x ′ The relative position geometric influence factor, G j (x ′ ) is the jth virtual line underground obstacle interference constraint at distance position x ′ The obstacle interference intensity value at the location, ξ is the correction coefficient of the degree of interference from obstacles in the buried cable laying pipeline.

[0153] The present invention obtains a pipeline obstacle interference evaluation calculation formula by using a specific mathematical model and after verification, which is used to identify and evaluate the underground obstacle interference of the underground cable virtual laying line. The pipeline obstacle interference evaluation calculation formula can calculate the interference degree caused by underground obstacles in the underground cable laying process. The formula integrates the influence of each obstacle on the line to evaluate the influence of the obstacle on the cable laying. The various items here have clear physical meanings, and the specific effects are as follows: the geometric influence factor of each obstacle on the cable laying represents the specific influence of the shape and position of the obstacle on the cable line laying; the interference intensity of each obstacle on the cable line reflects the influence of the obstacle on the cable line at different positions, including physical obstruction, space compression, etc.; the weight factor adjusts the interference influence of different types of obstacles, so that the evaluation result is more in line with the actual situation. In addition, by introducing a correction coefficient, it is used to further adjust the obstacle interference evaluation result, taking into account other non-quantitative factors (such as environmental conditions, obstacle type changes, etc.). By evaluating the impact of underground obstacles on cable laying, it is possible to determine which areas need to be avoided and which areas need to be adjusted, ultimately helping to design the best cable laying route. Through this step, designers can avoid laying cables in areas with high interference levels based on the results of interference degree calculations, thereby reducing the occurrence of later maintenance, failures and other problems. This formula can not only provide a preliminary interference assessment, but can also be used for subsequent design adjustments. By quantifying the degree of interference, it can help designers make continuous optimization adjustments to avoid areas with greater interference based on the results of obstacle interference assessments. In this way, the route can be adjusted according to actual conditions to ensure that the cable laying not only meets functional requirements, but also minimizes the incidence of later problems. In summary, this formula fully considers the degree of interference and obstruction of obstacles in underground cable laying pipelines I to , the total layout length L corresponding to the virtual layout line of the buried cable, the virtual line layout distance position parameter x ′ , the total number of virtual line underground obstacle interference constraints m, the jth virtual line underground obstacle interference constraint at distance position x ′ The relative position geometric influence factor fj (x ′ ), the jth virtual line underground obstacle interference constraint is at distance position x ′ The obstacle interference intensity value G j (x ′ ), the correction coefficient ξ of the interference degree of obstacles in underground cable laying pipelines, according to the interference degree of obstacles in underground cable laying pipelines I to The correlation between the above parameters constitutes a functional relationship The formula can realize the identification and evaluation process of underground obstacle interference for the virtual laying line of underground cables. At the same time, the correction coefficient ξ of the interference degree of obstacles in the laying of underground cable pipelines can be introduced to adjust according to the errors occurring in the calculation process, thereby improving the accuracy and applicability of the calculation formula for evaluating the interference of obstacles in laying pipelines.

[0154] Therefore, the embodiments should be regarded as illustrative and non-restrictive from all points, and the scope of the present invention is limited by the appended claims rather than the above description, and it is therefore intended that all changes falling within the meaning and range of equivalent elements of the application documents are included in the present invention.

[0155] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A method for underground cable line planning based on AR technology, characterized in that: The following steps are involved: Step S1: Acquire the underground terrain three-dimensional data and underground facility pipeline distribution data corresponding to the underground cable planning area, and perform three-dimensional digital modeling of the underground cable planning area based on the underground terrain three-dimensional data and the underground facility pipeline distribution data to generate a digital model of underground facilities in the planning area, and use augmented reality technology to overlay and display the digital model of underground facilities in the planning area on an AR mobile device; Step S2: Obtain the corresponding virtual layout line of the buried cable through the AR mobile device, and perform underground pipeline cross-constraint analysis on the digital model of underground facilities in the planned area based on the virtual layout line of the buried cable to generate virtual underground pipeline cross-constraints; Step S3: Obtain the corresponding underground obstacle distribution and underground interference facility distribution in the planning area through the digital model of underground facilities in the planning area, and perform underground line interference evaluation and analysis on the virtual laying line of the buried cable based on the underground obstacle distribution and underground interference facility distribution in the planning area, and obtain the virtual line underground obstacle interference constraint and virtual line underground electromagnetic wave interference constraint; Step S4: performing constraint line feedback adjustment design on the virtual underground cable layout line based on the virtual line underground pipeline crossing constraint, the virtual line underground obstacle interference constraint, and the virtual line underground electromagnetic wave interference constraint to generate a constraint feedback adjustment design scheme for the underground cable line; According to the constraint feedback adjustment design scheme of the underground cable line, the line feedback optimization planning processing is performed on the underground cable virtual layout line to generate the underground cable layout optimization planning line.

2. The method for planning underground cable lines based on AR technology according to claim 1 is characterized in that: Step S1 includes the following steps: Step S11: obtaining high-resolution surface images corresponding to the underground cable planning area through remote sensing satellites, and performing regional three-dimensional reconstruction of the surface morphology corresponding to the underground cable planning area in combination with ground laser scanning data corresponding to the underground cable planning area, so as to generate a three-dimensional reconstruction model of the surface morphology of the planning area; Step S12: Based on the three-dimensional reconstruction model of the surface morphology of the planned area, a three-dimensional scanning of the underground terrain space of the underground cable planning area is performed using geological radar imaging technology and underground acoustic wave detection technology to obtain the three-dimensional data of the underground terrain corresponding to the underground cable planning area, including the three-dimensional data of the underground terrain potential cavities, underground terrain settlement zones and underground terrain fault zones; Step S13: obtaining a historical underground facility pipeline layout design scheme corresponding to the underground cable planning area, and performing a facility pipeline distribution analysis on the underground cable planning area based on the historical underground facility pipeline layout design scheme to obtain underground facility pipeline distribution data corresponding to the underground cable planning area; Step S14: Performing three-dimensional digital modeling of the underground cable planning area based on the three-dimensional underground terrain data and the underground facility pipeline distribution data to generate a digital model of the underground facilities in the planning area; Step S15: Using augmented reality technology, the digital model of underground facilities in the planned area is superimposed and displayed on the AR mobile device.

3. The method for planning underground cable lines based on AR technology according to claim 2 is characterized in that: Step S14 includes the following steps: Step S141: Preliminary fusion of the underground terrain space of the underground cable planning area based on the underground terrain three-dimensional data to generate a preliminary three-dimensional framework model of the underground terrain space of the planning area; Step S142: Detailed analysis of the underground facility pipeline distribution data is performed to obtain detailed distribution of underground facility pipelines in the planned area, including the direction, buried depth and interlaced relationship of various underground facility pipelines; Step S143: Based on the detailed distribution of underground facilities and pipelines in the planning area, a preliminary three-dimensional framework model of the underground terrain space in the planning area is subjected to three-dimensional pipeline mapping digital modeling to generate a digital model of underground facilities in the planning area.

4. The method for planning underground cable lines based on AR technology according to claim 1, characterized in that: Step S2 includes the following steps: Step S21: obtaining a corresponding underground cable virtual layout line through an AR mobile device; Step S22: Based on the virtual layout of the buried cable, an in-depth relative position analysis is performed on the corresponding existing facility pipeline layout in the digital model of the underground facilities in the planned area to obtain the relative position relationship between the cable virtual line and the existing pipeline layout, including the spacing, depth and intersection between the cable and the existing pipeline; Step S23: Based on the spacing, depth and intersection between the cable and the existing pipeline, the virtual layout line of the buried cable and the corresponding existing facility pipeline layout in the digital model of the underground facilities in the planned area are determined to obtain the intersection distribution area between the virtual cable line and the existing pipeline layout; Step S24: performing a finite element cross structural damage assessment on the cross distribution area between the cable virtual line and the existing pipeline layout to generate a structural damage risk factor for the cross area between the cable virtual line and the existing pipeline layout; Step S25: performing underground pipeline crossing constraint analysis on the crossing distribution area between the virtual cable line and the existing pipeline layout based on the structural damage risk factor of the crossing area between the virtual cable line and the existing pipeline layout to generate virtual line underground pipeline crossing constraints.

5. The method for planning underground cable lines based on AR technology according to claim 4 is characterized in that: Step S23 includes the following steps: Step S231: performing spatial geometric constraint analysis on the virtual laying line of the buried cable and the corresponding existing facility pipeline layout in the digital model of underground facilities in the planned area based on the spacing and depth between the cable and the existing pipeline, so as to generate a spatial geometric layout constraint relationship between the virtual cable line and the existing pipeline layout; Step S232: Calculate the minimum safety boundary area of ​​the intersection between the cable virtual line and the existing pipeline layout based on the spatial geometric layout constraint relationship between the cable virtual line and the existing pipeline layout to obtain the minimum safety boundary area of ​​the intersection position between the cable virtual line and the existing pipeline layout; Step S233: Determine the intersection area of ​​the virtual laying line of the buried cable and the corresponding existing facility pipeline layout in the digital model of the underground facilities in the planned area according to the minimum safe boundary area of ​​the intersection position between the virtual cable line and the existing pipeline layout, and obtain the intersection distribution area between the virtual cable line and the existing pipeline layout.

6. The method for planning underground cable lines based on AR technology according to claim 4 is characterized in that: Step S24 includes the following steps: Step S241: performing finite element partitioning modeling on the intersection distribution area between the cable virtual line and the existing pipeline layout to generate a finite element sub-model of the intersection area between each cable and the existing pipeline; Step S242: Perform stress and deformation simulation analysis on the finite element sub-model of the intersection area between each cable and the existing pipeline by introducing a preset geomechanical model to generate the cable pipeline stress distribution, cable pipeline deformation component and cable pipeline structural mechanics interference factor corresponding to the finite element of each intersection area; Step S243: Based on the cable pipeline stress distribution corresponding to the finite elements of each intersection area, the cable pipeline deformation component and the cable pipeline structural mechanics interference factor, a structural damage assessment calculation formula is used to perform a structural damage assessment calculation on the intersection area finite element sub-model between each cable and the existing pipeline to generate a structural damage risk factor for the intersection area between the cable virtual line and the existing pipeline layout.

7. The method for planning underground cable lines based on AR technology according to claim 6 is characterized in that: The calculation formula for the cross structure damage assessment in step S243 is specifically: Where R is the structural damage risk factor of the intersection area between the cable virtual line and the existing pipeline layout, Ω is the intersection three-dimensional space area between the cable and the existing pipeline, x is the spatial coordinate of the intersection area, n is the total number of finite elements in the intersection area, σ i (x) is the stress distribution of the cable pipeline corresponding to the finite element of the i-th intersection area at the spatial coordinate x, α i is the stress structure damage adjustment factor corresponding to the finite element of the i-th intersection area, ε i (x) is the cable pipeline deformation component corresponding to the finite element of the i-th intersection area at the spatial coordinate x, κ i (x) is the cable pipeline structural mechanics interference factor corresponding to the finite element of the i-th intersection area at the spatial coordinate x, β i is the deformation structure damage adjustment factor corresponding to the finite element of the i-th intersection area, and η is the correction coefficient of the structural damage risk factor of the intersection area.

8. The method for planning underground cable lines based on AR technology according to claim 1, characterized in that: Step S3 includes the following steps: Step S31: obtaining the corresponding underground obstacle distribution and underground interference facility distribution in the planning area through the digital model of underground facilities in the planning area; Step S32: performing underground line interference numerical simulation on the underground obstacle distribution in the planning area and the underground interference facility distribution in the planning area respectively, so as to generate the underground obstacle interference distribution field in the planning area and the underground facility electromagnetic interference distribution field in the planning area; Step S33: performing underground obstacle interference constraint evaluation and analysis on the virtual laying line of the buried cable based on the underground obstacle interference distribution field in the planned area to obtain the underground obstacle interference constraint of the virtual line; Step S34: performing underground electromagnetic wave interference constraint evaluation and analysis on the virtual layout line of the buried cable based on the electromagnetic interference distribution field of the underground facilities in the planned area, and obtaining the underground electromagnetic wave interference constraint of the virtual line.

9. The method for planning underground cable lines based on AR technology according to claim 1, characterized in that: Step S4 includes the following steps: Step S41: performing pipeline intersection conflict detection and analysis on the underground cable virtual layout line based on the underground pipeline intersection constraint of the virtual line, and obtaining the underground cable layout pipeline intersection interference constraint model, which describes the pipeline intersection area and its influence range that need to be avoided during the underground cable line layout process; Step S42: Based on the virtual line underground obstacle interference constraint, use the pipeline laying obstacle interference evaluation calculation formula to identify and evaluate the underground obstacle interference of the underground cable virtual laying line, and obtain the degree of interference obstruction of the underground cable laying pipeline obstacle; Step S43: performing electromagnetic field distribution analysis on the virtual underground cable layout line based on the underground electromagnetic wave interference constraint of the virtual line to obtain the electromagnetic field interference distribution of the underground cable layout pipeline; performing electromagnetic field interference potential assessment analysis on the corresponding virtual underground cable layout line based on the electromagnetic field interference distribution of the underground cable layout pipeline to generate the electromagnetic interference potential distribution field of the underground cable layout pipeline; Step S44: Based on the underground cable laying pipeline cross interference constraint model, the interference obstruction degree of the underground cable laying pipeline obstacles and the underground cable laying pipeline electromagnetic interference potential distribution field, the underground cable laying pipeline virtual laying line is subjected to constraint line feedback adjustment design to generate an underground cable line constraint feedback adjustment design scheme; Step S45: performing line feedback optimization planning processing on the underground cable virtual layout line according to the underground cable line constraint feedback adjustment design scheme to generate an underground cable layout optimization planning line.

10. The method for planning underground cable lines based on AR technology according to claim 9, characterized in that: The calculation formula for evaluating the interference of pipeline obstacles in step S42 is specifically: In the formula, I to is the interference degree of obstacles in underground cable laying pipelines, L is the total length of the virtual laying line of underground cables, x ′ is the distance location parameter of the virtual line layout, m is the total number of underground obstacle interference constraints of the virtual line, and f j (x ′ ) is the jth virtual line underground obstacle interference constraint at distance position x ′ The relative position geometric influence factor, G j (x ′ ) is the jth virtual line underground obstacle interference constraint at distance position x ′ The obstacle interference intensity value at the location, ξ is the correction coefficient of the degree of interference from obstacles in the buried cable laying pipeline.

Images