Digital twin hydraulic modeling method and system for CAD drawing of urban water supply project

Abstract

The invention discloses an urban water supply project CAD drawing digital twin hydraulic modeling method and system. The method comprises the steps that S1, a CAD water supply horizontal plane design drawing and a CAD water supply vertical section design drawing are input; s2, identifying design data information in the drawing based on DXF group code data and water supply engineering drawing specifications in the CAD drawing; s3, checking, repairing, converting and normalizing the acquired data information; s4, the space coordinates of the CAD drawing are converted into geodetic 2000 geographic coordinates; s5, constructing a hydraulic model based on the processed data; according to the urban water supply project CAD drawing digital twinning hydraulic modeling method and system, the digital hydraulic model can be automatically constructed based on the CAD drawing, model data can be synchronously updated, automatic conversion from a traditional two-dimensional drawing to a three-dimensional digital twinning hydraulic model is achieved, the working efficiency is remarkably improved, human errors are reduced, and the method and system are suitable for popularization and application. The hydraulic model precision is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of urban water supply engineering, and more specifically, to a digital twin hydraulic modeling method and system for CAD drawings of urban water supply engineering. Background Art

[0002] Water supply engineering is an important part of urban infrastructure, which guarantees the daily living needs of residents, provides necessary raw materials for industrial production, and promotes the sustainable development of the city. The urban water supply system is huge and complex, including many water transmission and distribution facilities such as water intake structures, water treatment plants, water transmission and distribution pipelines, booster pumping stations, water towers, pressure regulating tanks, and regulating valves. The rationality of its planning, design, operation, and maintenance is directly related to the water supply safety and sustainable development of the city. Traditional water supply engineering design and management mainly rely on two-dimensional CAD drawings and empirical formulas, which have problems such as non-intuitive information and inability to reflect the actual hydraulic process. Therefore, with the rapid development of information technology, relying on digital twin hydraulic model simulation calculations for pipe network design optimization, equipment selection, water condition prediction, and fault diagnosis has become an important task for building a high-quality modern water supply facility system.

[0003] According to national regulations, the special design and construction design of the water supply system should form the final manuscripts in the form of CAD drawings and text specifications. However, there are many professional water supply pipe network hydraulic modeling analysis software on the market currently, such as WaterMaster, EPANET, WaterGEMS, Wanda, etc. The data formats used by these software are completely different from the CAD format, so it causes a large amount of repetitive work such as manual modeling and data conversion, as well as data verification problems; and over time, the aging, repair, and transformation of pipelines will cause changes in system parameters, and it is necessary to keep the CAD construction drawing data synchronized with the actual hydraulic model; in addition, the water supply engineering system is huge and complex. When modeling, it is necessary to reasonably simplify and abstract, ensuring that the model can accurately reflect the hydraulic characteristics of the system while avoiding being too complex, which may lead to excessive calculation amounts and difficulties in solving the model.

[0004] The invention application CN117994423A discloses a method for digitally three-dimensionally reverse constructing a scene and an intelligent twin system for gathering and transportation stations. The method includes: obtaining CAD drawings; extracting primitive data from the CAD drawings, and based on the primitive data, identifying and parsing the CAD drawings. The identification and parsing include: converting the CAD drawing format through a conversion tool, identifying the building outline, industrial equipment outline, and pipeline outline of the converted CAD drawing, and obtaining the size data of each outline; polling and searching for a matching three-dimensional model name in the three-dimensional model library according to the name of each outline; after finding the matching three-dimensional model name, importing the corresponding three-dimensional model into the generation interface, and adjusting the three-dimensional model according to the size data and placing it within the specified coordinates to implement the three-dimensional reverse conversion operation of the drawing, realizing the digital three-dimensional reverse construction of the scene from the CAD drawings; this solution is applicable to the three-dimensional modeling of gathering and transportation transfer fields in oilfields and is not applicable to the modeling of complex and frequently updated urban water supply projects. Summary of the Invention

[0005] The present invention provides a method and system for digitally twin hydraulic modeling of CAD drawings for urban water supply projects to solve the above-mentioned problems of the prior art.

[0006] The technical solution adopted by the present invention is:

[0007] The present invention provides a method for digitally twin hydraulic modeling of CAD drawings for urban water supply projects, characterized in that it includes the following steps:

[0008] S1: Input the CAD horizontal design drawing and CAD longitudinal section design drawing of the water supply.

[0009] S2: Based on the DXF group code data in the CAD drawings and the drawing specifications of the water supply project, identify the design data in the drawings.

[0010] S3: Check, repair, transform, and normalize the obtained data information.

[0011] S4: Convert the spatial coordinates of the CAD drawings into the Geodetic 2000 geographic coordinates.

[0012] S5: Construct a hydraulic model based on the processed data.

[0013] Furthermore, in the above-mentioned S2, graphic mining and pattern matching algorithms are adopted to mine the association rules between primitives such as pipelines, facilities, and standards, and the distribution rules of different facility types in space. At the same time, based on the drawing specifications of the water supply project, the geometric and semantic features of the primitives are matched, and then valuable design data information is accurately extracted from the huge and redundant primitive set in the drawings, including: the topological orientation of the pipelines, the types and layouts of water supply facilities, equipment information, pipeline elevation, pipe diameter, pipe material information, surveyed natural geographic elevation, and mileage stakes of pipelines and facilities.

[0014] Further, the specific steps of S3 include:

[0015] Step 1: Clean the extracted physical and design data, remove duplicate and incorrect data, and speculate or supplement missing data;

[0016] Step 2: Supplement the missing station numbers of pipeline nodes and facilities according to the geographical distance of the pipeline, speculate the missing pipe diameter and pipe material data according to the parameters of similar pipelines, and speculate the missing elevation data using the interpolation fitting method according to the design elevation of adjacent pipeline nodes;

[0017] Step 3: Check the graph structure of the pipe network diagram, delete isolated points, connect broken pipelines, delete overlapping pipe segments, delete suspended pipelines or establish correct connection nodes;

[0018] Step 4: Convert the data into a format recognizable by the modeling software and normalize the data units.

[0019] Further, in step S5, a graph theory method is adopted to construct a topological structure model of the water supply system according to the extracted pipeline and node information; reasonably simplify and abstract topological nodes according to pipeline attributes and facility layout; model water tanks, pumps, and valves in the system; and assign values to various parameters in the model according to the actual engineering situation, design manuals, or experimental data.

[0020] Further, a mathematical model of the pump is established according to its flow-head curve; a model of the valve is established according to the relationship between its opening and resistance coefficient; and a model of the water tank is established considering the relationship between its water level change and inflow and outflow.

[0021] Further, the parameters in the model include the roughness of the pipeline, the density and viscosity of the fluid, the initial flow rate, and the pressure.

[0022] Further, after step S5, it also includes: updating the hydraulic model based on the new CAD drawings and equipment parameters.

[0023] The present invention also provides a digital twin hydraulic modeling system for urban water supply engineering CAD drawings, including a drawing management module, a topological error correction module, a station number marking module, a three-dimensional elevation module, a coordinate conversion module, a data management module, and a model construction module.

[0024] Further, the drawing management module is used to import CAD drawings, extract pipe network data, and export hydraulic model data to CAD drawings; the topology error correction module is used to check the pipe network topology and connectivity; the mileage marking module is used to generate or supplement mileage globally or by project section; the three-dimensional elevation module is used to generate geographical elevation data of pipe network facilities; the coordinate conversion module is used to convert the drawing space coordinates into geographical coordinates; the data management module is used to store and query pipe network physical and model parameter data; the model construction module automatically constructs a hydraulic model according to the data provided by the data management module.

[0025] Further, the digital twin hydraulic modeling system for urban water supply engineering CAD drawings further includes: a model visualization module: presenting the pipe network layout and complex hydraulic model data in a visual form based on satellite maps; a geographical retrieval module: used for quickly retrieving the geographical locations of pipe network facilities; a model editing module: used for administrators to directly modify the pipe network topology, facility layout, and adjust hydraulic parameters in the visual interface.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The digital twin hydraulic modeling method and system for urban water supply engineering CAD drawings provided by the present invention can automatically construct a digital hydraulic model based on CAD drawings, synchronously update model data, realize the automatic conversion from traditional two-dimensional drawings to three-dimensional digital twin hydraulic models, significantly improve work efficiency, reduce human errors, and ensure the accuracy of the hydraulic model. Description of the Drawings

[0028] Figure 1 It is a flowchart of a digital twin hydraulic modeling method for urban water supply engineering CAD drawings; Detailed Embodiments

[0029] To completely describe the technical solutions provided in the embodiments of the present invention and make them easy for users to understand, the present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention are shown in the drawings, rather than all the structures.

[0030] Embodiment 1

[0031] Please refer to the drawings. An embodiment provided by the present invention, a digital twin hydraulic modeling method for urban water supply engineering CAD drawings, includes the following steps:

[0032] S1: Input the CAD horizontal design drawing of the water supply and the CAD longitudinal design drawing of the water supply.

[0033] S2: Identify the design data information in the drawing based on the DXF group code data in the CAD drawing and the water supply engineering drawing specification;

[0034] Specifically, based on the DXF group code data of the CAD water supply plan drawing, identify graphic elements such as CAD points, lines, circles, blocks, texts, and layers, so as to extract data such as the topological orientation of pipelines, facility layout (including water plants, pump stations, valves, etc.), stake number markings, and surveyed terrain elevations; extract design parameters such as pipeline, node facility design elevations, pipe materials, and pipe diameters from the DXF group code of the CAD water supply longitudinal section drawing, and organize the relationship with the planar pipeline objects.

[0035] S3: Check, repair, transform, and normalize the obtained data information;

[0036] In step S3, by cleaning the extracted physical and design data, remove duplicate and incorrect data, and reasonably infer or supplement missing data; according to the geographical distance of pipelines, supplement the missing stake numbers of pipeline nodes and facilities, infer the missing pipe diameter and pipe material data based on the parameters of similar pipelines, and infer the missing elevation data using the interpolation fitting method based on the design elevations of adjacent pipeline nodes.

[0037] Check the atlas structure of the pipe network diagram, delete isolated points, connect broken pipeline segments, delete overlapping pipe segments, delete suspended pipeline segments or establish correct connection nodes.

[0038] Convert the data into a format recognizable by the modeling software and normalize the data units. For example, unify the length unit to meters and the pressure unit to pascals, etc.

[0039] S4: Convert the spatial coordinates of the CAD drawing into the Geodetic 2000 geographic coordinates;

[0040] S5: Build a hydraulic model based on the processed data;

[0041] Adopt the graph theory method, and build a topological structure model of the water supply system according to the extracted pipeline and node information, and reasonably simplify and abstract the topological nodes according to the pipeline attributes and facility layout.

[0042] Model hydraulic components such as water tanks, pumps, and valves in the system; establish a mathematical model for the pump according to its flow-head curve; establish a model for the valve according to the relationship between its opening and resistance coefficient; establish a model for the water tank considering the relationship between its water level change and inflow and outflow.

[0043] Assign values to various parameters in the model according to the actual engineering situation, design manuals, or experimental data, including physical parameters such as the roughness of the pipeline, the density and viscosity of the fluid, as well as hydraulic parameters such as the initial flow rate and pressure.

[0044] After step S5, it further includes: updating the hydraulic model based on the new CAD drawings and equipment parameters, which facilitates the update of the model according to the actual construction content in the later stage.

[0045] Embodiment 2

[0046] An embodiment provided by the present invention provides a digital twin hydraulic modeling system for urban water supply engineering CAD drawings according to the method of Embodiment 1; the system includes a drawing management module, a topology error correction module, a stake number marking module, a three-dimensional elevation module, a coordinate conversion module, a data management module, and a model construction module.

[0047] The drawing management module is used to import CAD drawings, extract pipe network data, and export hydraulic model data to CAD drawings;

[0048] The topology error correction module is used to check the pipe network topology structure and connectivity; the stake number marking module is used to generate or complete stake numbers globally or by engineering segments;

[0049] The three-dimensional elevation module is used to generate geographical elevation data of pipe network facilities; the coordinate conversion module is used to convert the drawing space coordinates into geographical coordinates;

[0050] The data management module is used to store and query pipe network physical and model parameter data;

[0051] The model construction module automatically constructs a hydraulic model according to the data provided by the data management module.

[0052] Model visualization module: Based on satellite maps, present the pipe network layout and complex hydraulic model data in a visualized form;

[0053] Geographical retrieval module: Used to quickly retrieve the geographical locations of pipe network facilities;

[0054] Model editing module: Used for administrators to directly modify the pipe network topology structure, facility layout, and adjust hydraulic parameters in the visualization interface.

[0055] Embodiment 3

[0056] An embodiment provided by the present invention, different from Embodiment 2, a digital twin hydraulic modeling system for urban water supply engineering CAD drawings provided in this embodiment includes:

[0057] Drawing management module, topology error correction module, stake number marking module, three-dimensional elevation module, coordinate conversion module, data management module, model construction module.

[0058] The drawing management module is used to import CAD drawings, extract pipe network data, and export hydraulic model data to CAD drawings;

[0059] The topological error correction module is used to check the pipe network topological structure and connectivity; the mileage marking module is used to generate or complete mileage globally or by engineering segments;

[0060] The 3D elevation module is used to generate the geographical elevation data of pipe network facilities; the coordinate conversion module is used to convert the drawing space coordinates into geographical coordinates;

[0061] The data management module is used to store and query the pipe network physical and model parameter data;

[0062] The model construction module automatically constructs a hydraulic model according to the data provided by the data management module.

[0063] Furthermore, the system further includes

[0064] A model visualization module: presenting the pipe network layout and complex hydraulic model data in a visual form based on satellite maps;

[0065] A geographical retrieval module: used to quickly retrieve the geographical locations of pipe network facilities;

[0066] A model editing module: used for administrators to directly modify the pipe network topological structure, facility layout, and adjust hydraulic parameters in the visual interface.

[0067] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A method for hydraulic modeling of digital twins of CAD drawings of urban water supply projects, characterized by: The following steps are involved: S1: Input CAD water level design drawings and CAD water supply longitudinal section design drawings; S2: Based on the DXF group code data in the CAD drawing and the water supply engineering drawing specifications, identify the design data information in the drawing; S3: Check, repair, transform and normalize the acquired data information; S4: convert the spatial coordinates of the CAD drawing into the geodetic 2000 geographic coordinates; S5: Build a hydraulic model based on the processed data.

2. A method for hydraulic modeling of a digital twin of a city water supply project CAD drawing according to claim 1, characterized in that: The S2 includes the use of graph mining and pattern matching algorithms, based on the water supply engineering drawing specifications, to accurately extract the topological direction of the pipeline, the type and layout of water supply facilities, equipment information, pipeline elevation, pipe diameter, pipe material information, surveyed natural geographical elevation, pipeline and facility mileage pile numbers from the set of graphic elements in the figure.

3. The method for hydraulic modeling of a digital twin of a CAD drawing of an urban water supply project according to claim 1, characterized in that: The specific steps of S3 include: Step 1: Clean the extracted physical and design data, remove duplicate and erroneous data, and infer or supplement the missing data; Step 2: Supplement the missing stake numbers of pipeline nodes and facilities based on the geographical distance of the pipeline, infer the missing pipe diameter and pipe material data based on the parameters of similar pipelines, and infer the missing elevation data based on the design elevation of adjacent pipeline nodes using the interpolation fitting method; Step 3: Check the structure of the pipeline network diagram, delete isolated points, connect broken pipelines, delete overlapping pipe sections, delete spanning pipelines or establish correct connected nodes; Step 4: Convert the data into a format that can be recognized by the modeling software and normalize the data units.

4. The method for hydraulic modeling of a digital twin of a CAD drawing of an urban water supply project according to claim 1, characterized in that: The step S5 includes using graph theory methods to construct a topological structure model of the water supply system based on the extracted pipeline and node information; reasonably simplifying and abstracting topological nodes according to pipeline properties and facility layout; modeling the water tanks, water pumps, and valves in the system; and assigning values ​​to various parameters in the model based on actual engineering conditions, design manuals, or experimental data.

5. The method for hydraulic modeling of a digital twin of a CAD drawing of an urban water supply project according to claim 4, characterized in that: The mathematical model of a water pump is established based on its flow-head curve; the model of a valve is established based on the relationship between its opening and resistance coefficient; the model of a water tank is established by considering the relationship between its water level changes and the inlet and outlet water flow rates.

6. A method for hydraulic modeling of a digital twin of a city water supply project CAD drawing according to claim 4, characterized in that: The parameters in the model include pipe roughness, fluid density and viscosity, initial flow rate, and pressure.

7. The method for hydraulic modeling of a digital twin of a CAD drawing of an urban water supply project according to claim 1, characterized in that: The step S5 further includes: updating the hydraulic model based on the new CAD drawings and equipment parameters.

8. A digital twin hydraulic modeling system for a city water supply project CAD drawing, using the digital twin hydraulic modeling method for a city water supply project CAD drawing as claimed in any one of claims 1 to 7, characterized in that: It includes drawing management module, topology error correction module, pile number marking module, 3D elevation module, coordinate conversion module, data management module and model building module.

9. The urban water supply project CAD drawing digital twin hydraulic modeling system according to claim 8 is characterized by: The drawing management module is used to import CAD drawings, extract pipe network data, and export hydraulic model data to CAD drawings; The topology error correction module is used to check the topology structure and connectivity of the pipe network; the pile number marking module is used to generate or complete the pile number globally or in each project section; The three-dimensional elevation module is used to generate geographic elevation data of pipe network facilities; the coordinate conversion module is used to convert the paper space coordinates into geographic coordinates; The data management module is used to store and query the pipe network physical and model parameter data; The model building module automatically builds a hydraulic model based on the data provided by the data management module.

10. The urban water supply project CAD drawing digital twin hydraulic modeling system according to claim 8, characterized in that: Also includes Model visualization module: presents the pipe network layout and complex hydraulic model data in a visualized form based on satellite maps; Geographic search module: used to quickly search for the geographical location of pipe network facilities; Model editing module: It allows administrators to directly modify the network topology, facility layout, and adjust hydraulic parameters in the visual interface.

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