CN111429578B - Three-dimensional model generation method and three-dimensional virtual overhaul system for thermal power plant unit - Google Patents
Three-dimensional model generation method and three-dimensional virtual overhaul system for thermal power plant unit Download PDFInfo
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- CN111429578B CN111429578B CN202010216258.0A CN202010216258A CN111429578B CN 111429578 B CN111429578 B CN 111429578B CN 202010216258 A CN202010216258 A CN 202010216258A CN 111429578 B CN111429578 B CN 111429578B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
- G06T17/10—Constructive solid geometry [CSG] using solid primitives, e.g. cylinders, cubes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T15/00—3D [Three Dimensional] image rendering
- G06T15/10—Geometric effects
- G06T15/20—Perspective computation
- G06T15/205—Image-based rendering
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The invention provides a three-dimensional model generation method and a three-dimensional virtual overhaul system of a thermal power plant unit, wherein the three-dimensional model generation method comprises the following steps: generating point cloud data of a thermal power plant unit by adopting a three-dimensional laser scanner; generating a three-dimensional model of the thermal power plant unit by adopting a reverse engineering technology according to the point cloud data; obtaining a photograph of a thermal power plant unit; pasting a film on the three-dimensional structure model according to the photo to generate a three-dimensional model after pasting the film; rendering the three-dimensional model after film pasting by adopting a multi-detail-level technology and a dynamic shielding rejection technology to generate a rendered three-dimensional model; and displaying the rendered three-dimensional model by adopting an image quality self-adaption technology. According to the invention, a three-dimensional model is generated by reverse engineering, a photo is used for film pasting, a visual three-dimensional equipment model is established, the model is rendered by adopting a multi-detail level technology and a dynamic shielding and eliminating technology, and is displayed by adopting an image quality self-adaption technology, so that the running speed of the three-dimensional model is improved, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of unit modeling, in particular to a three-dimensional model generation method and a three-dimensional virtual overhaul system of a thermal power plant unit.
Background
At present, the three-dimensional overhaul simulation technology is still in a starting stage in a thermal power plant, and most of the three-dimensional overhaul simulation technology has the defects of poor field immersion, insufficient intelligence of an assembly scene, insufficient friendly interaction interface, insufficient function of a system and the like.
Disclosure of Invention
The invention aims to provide a three-dimensional model generation method and a three-dimensional virtual overhaul system of a thermal power plant unit, so as to establish an intuitive three-dimensional equipment model, perfect the functions of the three-dimensional virtual overhaul system and improve user experience.
In order to achieve the above object, the present invention provides the following solutions:
a three-dimensional model generation method of a thermal power plant unit comprises the following steps:
generating point cloud data of a thermal power plant unit by adopting a three-dimensional laser scanner;
generating a three-dimensional model of the thermal power plant unit by adopting a reverse engineering technology according to the point cloud data;
obtaining a photograph of a thermal power plant unit;
pasting a film on the three-dimensional structure model according to the photo to generate a three-dimensional model after pasting the film;
rendering the three-dimensional model after film pasting by adopting a multi-detail-level technology and a dynamic shielding rejection technology to generate a rendered three-dimensional model;
and displaying the rendered three-dimensional model by adopting an image quality self-adaption technology.
Optionally, the generating a three-dimensional model of the thermal power plant unit according to the point cloud data by adopting a reverse engineering technology further includes:
and generating the internal structure of the three-dimensional model of the thermal power plant unit by adopting a drawing modeling mode according to the drawing of the thermal power plant unit.
Optionally, the method for rendering the three-dimensional model after film pasting by adopting a multi-level-of-detail technology and a dynamic shielding and eliminating technology, and generating the rendered three-dimensional model specifically comprises the following steps:
based on a multi-level-of-detail technology, calculating a camera distance in real time according to a current observation view angle of a user, when the camera distance is larger than a preset threshold value, using a three-dimensional model of a first face number to identify the appearance of equipment, and when the camera is not larger than the preset threshold value, using a three-dimensional model of a second face number to identify the appearance of equipment, wherein the second face number is larger than the first face number;
based on a dynamic shielding eliminating technology, calculating the angle of the camera in real time according to the current observation view angle of a user, and determining the internally shielded structure of the three-dimensional model according to the angle calculation result, wherein the internally shielded structure stops rendering.
A three-dimensional virtual overhaul system of a thermal power plant unit, the three-dimensional virtual overhaul system comprising: a basic data layer, a three-dimensional scene layer and a three-dimensional application layer;
the basic data layer is used for generating a three-dimensional model of the thermal power plant unit by adopting a three-dimensional model generation method of the thermal power plant unit according to point cloud data of the thermal power plant unit generated by the three-dimensional laser scanner, and generating business data according to technical data of the thermal power plant unit; the technical data comprises a system flow chart, a design document, a process principle description, materials, drawings, operation and maintenance rules and expert knowledge base documents;
the three-dimensional scene layer is used for hanging the service data on the three-dimensional model to generate a three-dimensional scene containing the service data;
the application layer is used for interacting with the user in an interactive roaming mode.
Optionally, the three-dimensional scene containing the service data comprises a unit-level scene, a system-level scene and a device-level scene;
the unit-level scene comprises a building and steel structure of a power plant production area, a unit equipment structure and connecting pipelines among the unit equipment;
the system level scene comprises the spatial distribution of unit equipment, the arrangement of connecting pipelines among the unit equipment and the positions of valves;
the equipment level scene includes a model of the components of the crew equipment, a free view switching model of the components of the crew equipment, and an exploded view of the components of the crew equipment.
Optionally, the application layer comprises a structural principle learning module, an overhaul process learning module and a typical fault learning module;
the structure principle learning module is used for displaying the composition structure and the working principle of the unit equipment according to the user instruction;
the overhaul process learning module is used for simulating an overhaul process of the unit equipment according to the user instruction;
the typical fault learning module is used for demonstrating fault phenomena by utilizing the effect of the three-dimensional scene of the unit equipment according to the user instruction.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a three-dimensional model generation method and a three-dimensional virtual overhaul system of a thermal power plant unit, wherein the three-dimensional model generation method comprises the following steps: generating point cloud data of a thermal power plant unit by adopting a three-dimensional laser scanner; generating a three-dimensional model of the thermal power plant unit by adopting a reverse engineering technology according to the point cloud data; obtaining a photograph of a thermal power plant unit; pasting a film on the three-dimensional structure model according to the photo to generate a three-dimensional model after pasting the film; rendering the three-dimensional model after film pasting by adopting a multi-detail-level technology and a dynamic shielding rejection technology to generate a rendered three-dimensional model; and displaying the rendered three-dimensional model by adopting an image quality self-adaption technology. According to the invention, a three-dimensional model is generated by reverse engineering, a photo is used for film pasting, a visual three-dimensional equipment model is established, the model is rendered by adopting a multi-detail level technology and a dynamic shielding and eliminating technology, and is displayed by adopting an image quality self-adaption technology, so that the running speed of the three-dimensional model is improved, and the user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a three-dimensional model generation method of a thermal power plant unit provided by the invention;
FIG. 2 is a block diagram of a three-dimensional virtual overhaul system of a thermal power plant unit provided by the invention;
fig. 3 is a structural diagram of an application layer of a three-dimensional virtual overhaul system of a thermal power plant unit.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a three-dimensional model generation method and a three-dimensional virtual overhaul system of a thermal power plant unit, so as to establish an intuitive three-dimensional equipment model, perfect the functions of the three-dimensional virtual overhaul system and improve user experience.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
In order to achieve the purpose, the invention considers that a three-dimensional model is built by combining various visualization technologies such as data visualization, reverse engineering, virtual Reality (VR) and the like, and a maintenance training platform of millions of units is formed. And establishing a three-dimensional equipment model library, an overhaul rule knowledge base and an evaluation knowledge base with visual images, and realizing interactive application of power plant overhaul training, exercise and evaluation integration. The bottleneck that the original power plant can only run simulation training is broken, the approach of staff overhaul skill training is expanded, and the operation skills of overhaul staff are improved and evaluated.
The method specifically comprises the following steps: as shown in fig. 1, the invention provides a three-dimensional model generation method of a thermal power plant unit, which comprises the following steps:
generating point cloud data of a thermal power plant unit by adopting a three-dimensional laser scanner;
and generating a three-dimensional model of the thermal power plant unit by adopting a reverse engineering technology according to the point cloud data. And generating the internal structure of the three-dimensional model of the thermal power plant unit by adopting a drawing modeling mode according to the drawing of the thermal power plant unit.
The method specifically comprises the following steps: the three-dimensional model of the invention is established by using reverse engineering technology. And (3) performing design technology reproduction on the constructed assets by reverse engineering, wherein a model required by the three-dimensional virtual training system is constructed by using the reverse engineering. The original data used in the reverse engineering are laser scanning point clouds, drawings and photos.
The model obtained by adopting the laser scanning method, whether the model is provided by a design institute or a manufacturer and is different from a completion state or the power plant is modified in operation, can ensure the consistency of the model and the site through rescanning. The scanning point clouds in different periods are used as historical data and can also be used as a basis for judging the change of the state of the asset. The modeling method has the advantages that the modeling method has requirements on model precision, and equipment capable of providing scanning conditions on site is recommended to use a laser scanning mode for modeling. For places where laser scanning cannot reach (e.g., underground, inside the equipment), drawing modeling is used as a supplement.
And obtaining a photograph of the thermal power plant unit.
And pasting a film on the three-dimensional structure model according to the photo, and generating a three-dimensional model after pasting the film.
Rendering the three-dimensional model after film pasting by adopting a multi-detail-level technology and a dynamic shielding elimination technology to generate a rendered three-dimensional model.
The method specifically comprises the following steps: in order to ensure the efficiency of using a three-dimensional system by a common office computer of a power plant user, a model light weight technology needs to be adopted: dynamic OC, levels of Detail, image quality adaptation, etc., control the number of triangles that a single device is simultaneously rendered as low as possible.
The LOD (level of Detail) technology can determine the resource allocation of object rendering according to the position and importance of the nodes of the object model in the display environment, and reduce the number of planes and the Detail of non-important objects, so as to obtain high-efficiency rendering operation. For the model of three-dimensional virtual overhaul, the camera distance is calculated in real time according to the current observation visual angle of a user, when the camera distance is far, the appearance of equipment is marked by using a model with a small number of faces, and when the camera is close to the model, the model is replaced by a model with a large number of faces and richer details, so that the effect of improving the overall rendering speed is achieved.
Dynamic occlusion culling (Occlusion Culling) is an optimization measure to improve performance by avoiding rendering the geometry facing away from the viewer.
For the three-dimensional virtual overhaul model, the angle of the camera is calculated in real time according to the current observation view angle of a user, the shielded structure inside the equipment can automatically stop rendering, and when the camera rotates, the internal structure is gradually displayed according to the real-time calculation result, so that the effect of improving the overall rendering speed is achieved.
And displaying the rendered three-dimensional model by adopting an image quality self-adaption technology.
The method specifically comprises the following steps: the image quality is automatically adjusted according to the client hardware used. The display device can ensure good display effect on high-performance equipment and can smoothly run on equipment with poor performance.
As shown in fig. 2, the present invention further provides a three-dimensional virtual overhaul system of a thermal power plant, the three-dimensional virtual overhaul system comprising: a basic data layer, a three-dimensional scene layer and a three-dimensional application layer;
the basic data layer is used for generating a three-dimensional model of the thermal power plant unit by adopting a three-dimensional model generation method of the thermal power plant unit according to point cloud data of the thermal power plant unit generated by the three-dimensional laser scanner, and generating business data according to technical data of the thermal power plant unit; the technical data comprises a system flow chart, a design document, a process principle description, materials, drawings, operation and maintenance rules and expert knowledge base documents; specifically, the work of on-site real objects and converting unstructured data into a standard three-dimensional model and structured data is mainly completed in a data layer. The basic data comprise point cloud data generated by a three-dimensional laser scanner, a system flow chart, a design document, a technological principle description, materials, drawings, operation and maintenance rules, expert knowledge base documents and the like. And obtaining a standard format three-dimensional model and various static and dynamic business data meeting the system requirements through reverse engineering and standardization work.
The three-dimensional modeling data scheme is used for carrying out abstract arrangement on a large amount of field objects and unstructured data of a power plant to obtain data meeting modeling requirements. The input of the process is the original data, and the output is the three-dimensional modeling data.
First, for the equipment to be three-dimensionally modeled, the following raw materials are collected according to the specific conditions on site as shown in table 1.
TABLE 1 three-dimensional modeling raw data table
When the original data is collected, the basic principle is that parts to be represented in the overhaul process can be modeled only by at least one item of drawing, photo and point cloud data. If the conditions allow, the variety of the materials should be as much as possible, so that the modeling efficiency can be improved and the accuracy of the model size can be ensured.
The three-dimensional modeling process of the invention is based on drawings and point clouds, and uses modeling tools (CAD, 3DMAX, solidWorks, etc.) to complete wire frame models and mapping in combination with photographs and related documents of equipment. According to the requirements of three-dimensional operation guidance, special effects are added to the parts which need to represent the working principle and the disassembly step. The model output format is FBX. The index of the three-dimensional model of the present invention is shown in table 2:
TABLE 2 index of three-dimensional model
In order to ensure the efficiency of using a three-dimensional model by an office computer of a power plant, a model light weight technology is adopted: dynamic OC (Dynamic occlusion elimination), level of Detail (multi-Detail level), and on the premise of ensuring the usability of a product model, the original model data is compressed, filtered and optimized so as to reduce the model scale, reduce the memory usage amount, accelerate the display speed and control the number of triangle surfaces rendered by a single device to be no more than 100 vantage. The normalized operating parameters of the model of the present invention are shown in table 3.
TABLE 3 operating parameters normalized by the model
| Project | Standard of |
| Model file | Wire frame model: less than 10MB |
| Load time | <30s |
| Speed of operation | FPS>30 |
The three-dimensional scene layer is used for hanging the service data on the three-dimensional model to generate a three-dimensional scene containing the service data; specifically, the three-dimensional scene layer is responsible for configuring standardized data into a three-dimensional scene containing business data. The three-dimensional scene containing the service data comprises a unit-level scene, a system-level scene and an equipment-level scene; the unit-level scene comprises a building and steel structure of a power plant production area, a unit equipment structure and connecting pipelines among the unit equipment; the system level scene comprises the spatial distribution of unit equipment, the arrangement of connecting pipelines among the unit equipment and the positions of valves; the equipment level scene includes a model of the components of the crew equipment, a free view switching model of the components of the crew equipment, and an exploded view of the components of the crew equipment. Specifically, to ensure rendering efficiency, the power plant is divided into three levels of scenes: a unit level scene, a system level scene and a device level scene. The unit-level scene shows the building and steel structure of the power plant production area, the unit is mainly designed and connected with the pipeline, and each component system of the unit is shown and is expressed as an organic whole. The system level scene mainly reflects the spatial distribution of equipment, the arrangement of pipelines and the positions of valves. The system level scene and the two-dimensional flow chart can be in clear contrast, and a real production site can be intuitively perceived. The device-level scene embodies the fine modeling of the component level, free view angle switching and exploded view, and each part and detail of the device can be checked.
The application layer is used for interacting with the user in an interactive roaming mode.
The application layer comprises a structural principle learning module, an overhaul process learning module and a typical fault learning module; the structure principle learning module is used for displaying the composition structure and the working principle of the unit equipment according to the user instruction; the overhaul process learning module is used for simulating an overhaul process of the unit equipment according to the user instruction; the typical fault learning module is used for demonstrating fault phenomena by utilizing the effect of the three-dimensional scene of the unit equipment according to the user instruction.
Specifically, the scheme of the three-dimensional virtual overhaul functional module is to select a proper three-dimensional engine and realize all the preset functions of the system through secondary development. The input of the process is standardized model and data, and the output is a three-dimensional virtual overhaul system. And the three-dimensional scene editor conforming to the equipment simulation maintenance is manufactured based on the Unity3D, UI and interaction customization is realized in a configuration mode, and the UI and interaction customization can be rapidly expanded according to new requirements to form a resource library, so that complex interface configuration and three-dimensional application can be efficiently completed. The application layer of the present invention as shown in fig. 3 includes three functional modules: the system comprises a structural principle learning module, an overhaul process learning module and a typical fault learning module. And a structural principle learning module: the device comprises the functions of part tree diagram, explosion diagram decomposition, working principle demonstration and the like, and comprehensively introduces the composition structure and the working principle of a device. And (3) an overhaul process module: and the whole process of caption, audio and animation, hanging related documents, and demonstrating and overhauling is comprehensively utilized. The user can simulate the whole process of one-time maintenance, including preparation before maintenance, disassembly sequence, quality inspection point content, standard and the like. Typical fault learning module: the typical faults of the equipment are classified and arranged according to the fault phenomenon, the fault reason and the prevention treatment, and the fault phenomenon is intuitively demonstrated by utilizing various effects of the three-dimensional scene.
As shown in fig. 3, the application layer of the present invention includes a login page, and the login page of the present invention includes: the login window is used for inputting a user name and a password and is used for detecting the legal identity of the user. The help button is used for ejecting a help document, and the contents of function menu introduction, operation methods, common fault removal and the like are recorded on the help button.
The application layer of the invention also comprises a device selection page, the device selection page lists a factory diagram and all selectable devices, the first click displays the introduction text of the selected device, the spatial orientation of the device is marked on the factory diagram, and the second click enters the corresponding device scene.
The application layer of the present invention further includes a structural principle learning module (structural principle module in fig. 3), and the structural principle learning module of the present invention includes:
device part object tree: in the structure display state, the device component object tree is displayed. Clicking a single selection box before the object name to control the display and the hiding of the object model; clicking an expansion button after the object name to control expansion and retraction of the object tree; clicking the object name, and highlighting the corresponding model; double clicking on the object name, the lens focuses on the three-dimensional model of the object.
Explosion diagram: in the structure display state, clicking the explosion diagram button controls the explosion and recovery states of the device, and in the explosion diagram mode, all operations of the object tree are still valid.
And (3) label display: in the structure display state, clicking the label button controls the display and hiding of the label.
Scene interaction function: in the structure display state, the clicking model highlights and prompts, the text introduction and the voice reading of the part are displayed at the same time, and the object tree cursor points to the object; the model is double-clicked, and the lens focuses the object centrally. Clicking the right button cancels the selected state.
Principle display: listing the contents of the working principle, technical parameters, operation guide and the like of the equipment, clicking the corresponding menu to start demonstration.
The application layer of the present invention further includes an overhaul process learning module (overhaul process module in fig. 3) the overhaul process learning module of the present invention includes:
maintenance process status bar: the overhaul process status bar displays the following: dividing the maintenance operation stage and the position of the current step; the name of the current step; the positions of the quality inspection system point, the quality assurance system point and the maintenance record point; and controlling the forward and backward steps.
And (3) demonstration of overhaul steps: the step serial number is attached to an object model to be operated in the step, and related characters and state prompts are displayed when a mouse is hovered; the steps that have been performed are shown gray and the steps that have not been performed are shown white; the step demonstration mode includes caption, animation, voice, video, picture and the like.
Evaluation mode: in the evaluation mode, the step serial numbers are not displayed any more, the user must click on the current step serial number according to the correct sequence, the step is normally demonstrated when clicking is correct, and the system records and prompts the user to operate incorrectly when clicking is incorrect until clicking is correct.
Examination questions: after clicking the examination questions, the system automatically extracts a plurality of questions from the question library of the equipment, the question stems are displayed in a mode of combining text description and three-dimensional scenes, the questions are objective questions, the user automatically enters the next question after selecting answers, and after all answers are completed, the system gives correct answers and judges the answers of the user.
The application layer of the invention also comprises a typical fault learning module, and the main function of the typical fault learning module is to sort and arrange typical faults of each device according to fault phenomena, fault reasons and prevention treatment, and visually demonstrate the fault phenomena by utilizing various effects of a three-dimensional scene.
In the virtual environment, due to the interaction of users and the movement of objects, the objects are likely to collide with each other frequently, and in order to maintain the authenticity of the environment, the collisions need to be detected in time, corresponding collision reactions are calculated, and the drawing results are updated so as to prevent the penetration phenomenon between the objects and destroy the reality of the virtual environment and the immersion of the users. Through interactive roaming users, the views can be flexibly and accurately observed in all directions, virtual objects in the views are picked up, and information is queried. The interactive roaming process is a process of continuously changing the viewpoint position or the line of sight direction and rendering the view according to the interactive control command.
Documents, drawings, photos and videos related to overhaul can be hung in each interaction step, so that a user can conveniently review and refer at any time. When the data is updated, the user can modify the configuration file to make addition, deletion and modification.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a three-dimensional model generation method and a three-dimensional virtual overhaul system of a thermal power plant unit, wherein the three-dimensional model generation method comprises the following steps: generating point cloud data of a thermal power plant unit by adopting a three-dimensional laser scanner; generating a three-dimensional model of the thermal power plant unit by adopting a reverse engineering technology according to the point cloud data; obtaining a photograph of a thermal power plant unit; pasting a film on the three-dimensional structure model according to the photo to generate a three-dimensional model after pasting the film; rendering the three-dimensional model after film pasting by adopting a multi-detail-level technology and a dynamic shielding rejection technology to generate a rendered three-dimensional model; and displaying the rendered three-dimensional model by adopting an image quality self-adaption technology. According to the invention, a three-dimensional model is generated by reverse engineering, a photo is used for film pasting, a visual three-dimensional equipment model is established, the model is rendered by adopting a multi-detail level technology and a dynamic shielding and eliminating technology, and is displayed by adopting an image quality self-adaption technology, so that the running speed of the three-dimensional model is improved, and the user experience is improved.
The invention comprehensively utilizes reverse engineering to restore the field device into high-precision three-dimensional simulation, and secondary development of modeling tools and three-dimensional engines is performed to match with efficient development and configuration of overhaul simulation functions.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (5)
1. The three-dimensional model generation method of the thermal power plant unit is characterized by comprising the following steps of:
generating point cloud data of a thermal power plant unit by adopting a three-dimensional laser scanner;
generating a three-dimensional model of the thermal power plant unit by adopting a reverse engineering technology according to the point cloud data;
obtaining a photograph of a thermal power plant unit;
pasting a film on the three-dimensional structure model according to the photo to generate a three-dimensional model after pasting the film;
rendering the three-dimensional model after film pasting by adopting a multi-detail-level technology and a dynamic shielding rejection technology to generate a rendered three-dimensional model;
displaying the rendered three-dimensional model by adopting an image quality self-adaption technology;
rendering the three-dimensional model after film pasting by adopting a multi-detail-level technology and a dynamic shielding and eliminating technology to generate a rendered three-dimensional model, and specifically comprises the following steps:
based on a multi-level-of-detail technology, calculating a camera distance in real time according to a current observation view angle of a user, when the camera distance is larger than a preset threshold value, using a three-dimensional model of a first face number to identify the appearance of equipment, and when the camera is not larger than the preset threshold value, using a three-dimensional model of a second face number to identify the appearance of equipment, wherein the second face number is larger than the first face number;
based on a dynamic shielding eliminating technology, calculating the angle of the camera in real time according to the current observation view angle of a user, and determining the internally shielded structure of the three-dimensional model according to the angle calculation result, wherein the internally shielded structure stops rendering.
2. The method for generating a three-dimensional model of a thermal power plant unit according to claim 1, wherein the generating a three-dimensional model of a thermal power plant unit according to the point cloud data by using a reverse engineering technique further comprises:
and generating the internal structure of the three-dimensional model of the thermal power plant unit by adopting a drawing modeling mode according to the drawing of the thermal power plant unit.
3. A three-dimensional virtual overhaul system of a thermal power plant unit, the three-dimensional virtual overhaul system comprising: a basic data layer, a three-dimensional scene layer and a three-dimensional application layer;
the basic data layer is used for generating point cloud data of a thermal power plant unit according to a three-dimensional laser scanner, generating a three-dimensional model of the thermal power plant unit by adopting the three-dimensional model generation method of the thermal power plant unit according to any one of claims 1-2, and generating business data according to technical data of the thermal power plant unit; the technical data comprises a system flow chart, a design document, a process principle description, materials, drawings, operation and maintenance rules and expert knowledge base documents;
the three-dimensional scene layer is used for hanging the service data on the three-dimensional model to generate a three-dimensional scene containing the service data;
the application layer is used for interacting with the user in an interactive roaming mode.
4. A three-dimensional virtual overhaul system for a thermal power plant according to claim 3, wherein the three-dimensional scene containing business data comprises a plant-level scene, a system-level scene and an equipment-level scene;
the unit-level scene comprises a building and steel structure of a power plant production area, a unit equipment structure and connecting pipelines among the unit equipment;
the system level scene comprises the spatial distribution of unit equipment, the arrangement of connecting pipelines among the unit equipment and the positions of valves;
the equipment level scene includes a model of the components of the crew equipment, a free view switching model of the components of the crew equipment, and an exploded view of the components of the crew equipment.
5. A three-dimensional virtual overhaul system of a thermal power plant unit according to claim 3, wherein the application layer comprises a structural principle learning module, an overhaul process learning module and a typical fault learning module;
the structure principle learning module is used for displaying the composition structure and the working principle of the unit equipment according to the user instruction;
the overhaul process learning module is used for simulating an overhaul process of the unit equipment according to the user instruction;
the typical fault learning module is used for demonstrating fault phenomena by utilizing the effect of the three-dimensional scene of the unit equipment according to the user instruction.
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