Virtual reality training platform for improving occupational skills of building workers

Abstract

The invention discloses a virtual reality training platform for improving occupational skills of building workers, and aims to solve the problems that current virtual reality training generally takes online videos or texts as a main mode and lacks face-to-face interaction and participation sense, the building workers may feel isolated and lack of power, and the training efficiency is high. The technical problems that the learning effect, the participation degree, the pertinence, the effectiveness, the safety awareness and the operation skill are reduced due to the fact that the virtual reality technology acceptability and the use experience of different building workers are different, and the learning effect is not consistent are solved. Comprising a process simulation practical training system which is used for displaying construction process flows of building foundation engineering, main body structure engineering, decoration engineering and building construction measurement engineering. The safety consciousness and operation skills of building workers are effectively improved, and the workers can practice repeatedly in a safe environment and master various safety operation regulations and emergency treatment processes skillfully.

Description

Technical Field

[0001] The present invention relates to the technical field of training platforms, and particularly to a virtual reality training platform for improving the vocational skills of construction workers. Background Art

[0002] The virtual reality training platform for improving the vocational skills of construction workers utilizes virtual reality (VR) technology to provide an immersive training experience for construction workers, aiming to enhance their safety awareness, operation skills, and emergency handling capabilities. Virtual reality technology is a computer simulation system that can create and experience virtual worlds. It uses a computer to generate a simulated environment, which is a multi-source information fusion, interactive three-dimensional dynamic visual scene and entity behavior system simulation that enables users to immerse themselves in this environment. Among them, the combination of VR technology and the vocational skills education of construction workers is one of the most familiar applications. The importance of the vocational skills education of construction workers needless to say, so all technologies that are beneficial to the vocational skills education of construction workers are favored by the public. VR is a new technology that has been controversial in the current vocational skills education technology of construction workers. More and more implementation cases show that there are great benefits in the combination of VR technology and the vocational skills education of construction workers.

[0003] In the process of implementing the invention, the inventor found that at least the following problems in the prior art have not been solved. During the use process, traditional virtual reality training usually takes online videos or texts as the main methods, lacking face-to-face interaction and a sense of participation. Construction workers may feel isolated and lack motivation, thereby reducing learning effects, participation, pertinence, effectiveness, safety awareness, and operation skills. Moreover, it is easy for the learning effects to be inconsistent due to different acceptance degrees and usage experiences of virtual reality technology by different construction workers. Therefore, new technical solutions need to be designed to solve this problem. Summary of the Invention

[0004] The purpose of the present invention is to provide a virtual reality training platform for improving the vocational skills of construction workers, so as to solve the technical problems that current virtual reality training usually takes online videos or texts as the main methods, lacking face-to-face interaction and a sense of participation, construction workers may feel isolated and lack motivation, thereby reducing learning effects, participation, pertinence, effectiveness, safety awareness, and operation skills, and it is easy for the learning effects to be inconsistent due to different acceptance degrees and usage experiences of virtual reality technology by different construction workers.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A virtual reality training platform for improving the vocational skills of construction workers, including a process simulation training system: used to display the construction process flow of building foundation engineering, main structure engineering, decoration engineering, and building construction surveying engineering;

[0006] Virtual simulation software system: used to highly restore the training scenario, make the entire construction process visual, and feedback drawings, specifications, theoretical questions, and animation resources in combination with the actual job skill requirements;

[0007] VR experience system: used to create a virtual training scenario by using VR technology, and simulate and restore various common accident types in construction, allowing workers to have an immersive experience with a high sense of reality.

[0008] As a preferred embodiment of the present invention, the process simulation training system includes:

[0009] Virtual construction scene simulation module: used to simulate the real construction scene through 3D modeling technology on the basis of a virtual three-dimensional environment. The construction scene can simulate the construction scenes of the construction site, material warehouse, and construction machinery and equipment. Construction workers perform construction simulation operations in the virtual scene;

[0010] Construction engineering operation module: used to provide simulation operations for basic construction, structural construction, and decorative construction projects;

[0011] Problem-solving module: used to simulate the problems encountered in construction projects and the adjusted construction processes;

[0012] Team collaboration module: used to simulate the team cooperation scenarios in construction projects;

[0013] Assessment and evaluation module: used to evaluate and assess the performance of construction workers in virtual training.

[0014] As a preferred embodiment of the present invention, the virtual simulation software system includes:

[0015] Virtual environment creation module: uses a three-dimensional terrain generation algorithm by a computer to create a realistic terrain model, and then uses a three-dimensional coverage algorithm to deploy virtual sensor nodes, thereby monitoring and covering the terrain model to generate a virtual three-dimensional environment;

[0016] Multi-sensory interaction experience module: uses auxiliary sensing devices to provide a three-dimensional interface for users to interact with the virtual three-dimensional environment;

[0017] Highly restore training scenario module: takes the actual construction scenario as a template, integrates the training content of each type of work into the construction scene created by the virtual construction scene simulation module to ensure the high restoration of the training content;

[0018] Case resource module: divides the training steps according to the national vocational skill standards to ensure the close connection between the training content and job skills;

[0019] "Learning, Training, and Assessment" Integrated Module: It is used to integrate learning, training, and assessment, and enhance the interaction between teachers and students through interactive functions.

[0020] The virtual environment creation module can simulate real construction scenarios during the training of construction trades, and integrate the training content of each trade into the virtual three-dimensional environment in a 1:1 ratio, visualizing the entire construction process;

[0021] The multi-sensory interaction experience module enables construction workers to simulate various tools through mouse operations during the training of construction trades. At the same time, it provides excellent picture texture and real light and shadow effects, allowing construction workers to practice construction operations as if they were on-site, enhancing the training interaction experience;

[0022] The training content includes the training of welders, steel workers, concrete workers, and scaffolders, enabling construction workers to immerse themselves in the virtual three-dimensional environment, observe, and operate various construction tools and equipment.

[0023] As a preferred embodiment of the present invention, the VR experience system includes:

[0024] Graphics workstation: It is used to process complex graphics rendering and computing tasks to ensure that users can immerse themselves in a realistic virtual construction environment;

[0025] Front-end experience device: It is used for construction workers to enter a virtual construction scene, restoring the complex environment and real operation process of the construction site;

[0026] High-definition display system: It is realized through VR helmet display devices. After workers wear VR helmets, they can immerse themselves in the construction site;

[0027] Voice system: It can provide real-time feedback and prompts according to the operations of users and the changes in the virtual construction environment;

[0028] Induction system: It combines sensors and somatosensory simulation devices to capture the movement and position information of construction workers;

[0029] Auxiliary equipment: It is used to simulate the safety scenarios of the construction site.

[0030] As a preferred embodiment of the present invention, the graphics workstation is combined with interactive devices such as VR helmets to jointly create a multi-sensory virtual construction environment;

[0031] The front-end experience device includes interactive devices such as VR helmets and handles;

[0032] The high-definition display system is combined with a gesture input system and a three-dimensional voice system to enhance the participation and learning effect of construction workers;

[0033] The voice system provides real-time feedback and prompts according to the user's operations and changes in the virtual environment;

[0034] The sensing system simulates scenarios of working at heights, mechanical operations, and electrocution construction, making construction workers feel as if they are in a real construction environment;

[0035] The auxiliary devices include a display screen, a host computer, an intelligent walking platform, and a 9D interactive space capsule.

[0036] As a preferred embodiment of the present invention, the 3D modeling technology for simulating real construction scenarios includes the following steps:

[0037] S1: Use high-precision measuring instruments and photographic equipment to measure and photograph the real scenario to obtain detailed data on terrain, buildings, and vegetation elements;

[0038] S2: Process the collected data, including image denoising, color correction, and texture mapping, to improve the realism of the 3D model. At the same time, use fast image matching technology or laser scanning technology to generate DOM and DSM, providing basic data for 3D modeling;

[0039] S3: Use 3D modeling software to convert the processed data into a 3D model.

[0040] As a preferred embodiment of the present invention, the computer-generated virtual 3D environment includes the following steps:

[0041] ST1: Define the theme, purpose, and style of the virtual environment, and design the overall layout, color scheme, and atmosphere of the environment;

[0042] ST2: Use 3D modeling software to create each object in the environment;

[0043] ST3: Apply textures and materials to the models;

[0044] ST4: Add lights to the environment to simulate the lighting effects of the real world, adjust the color, intensity, and position of the lights to create the desired atmosphere, calculate and apply shadows to enhance the depth and realism of the scene;

[0045] Use a rendering engine to convert the 3D scene into a 2D image or video, and adjust the rendering settings;

[0046] Test the virtual environment on different devices and platforms to ensure its performance and compatibility, and optimize it according to the test results.

[0047] As a preferred embodiment of the present invention, the 3D terrain generation algorithm is specifically a 3D terrain generation method for a virtual environment, and adds multi-level details to the terrain through a diamond-square iteration process;

[0048] The three-dimensional coverage algorithm is specifically a three-dimensional coverage algorithm related to area division and virtual force, which is used for node coverage in a three-dimensional wireless sensor network. By introducing an attraction source, it reduces coverage holes and lowers network energy consumption.

[0049] As a preferred embodiment of the present invention, the formula of the three-dimensional terrain generation algorithm is:

[0050] Rhombus processing stage:

[0051] Calculation formula for the height value of the midpoint M:

[0052] M i,j = 41(F i,j + F i+1,j + F i,j+1 + F i+1,j+1 ) + Std × K × 2d - i(3 - D)

[0053] where Std is a normally distributed random number with a mean of 0 and a standard deviation of 1; K is the amplitude coefficient; i is the current iteration number; D is the fractal dimension, and its value range is [2.3, 3.0];

[0054] Square processing stage:

[0055] Calculation formula for the height value of the midpoint of each side of the square (taking one side as an example):

[0056] M i,j = 21(M i,j + M i+1,j ) + Std × K × 2d - i(3 - D)

[0057] Similarly, the height values of the midpoints of the other three sides can also be calculated by similar formulas.

[0058] As a preferred embodiment of the present invention, the formula of the three-dimensional coverage algorithm is:

[0059] Gravitational force of the attraction source received by the node:

[0060]

[0061] where k is the gravitational coefficient; (x, y, z) are the coordinates of the node; (xg, yg, zg) are the coordinates of the attraction source;

[0062] Mobile energy consumption of the entire network:

[0063] E = ∑ i＝1 n∣E i × tan(F i ) × 2∣

[0064] where E iThe mobile energy consumption of node i; F i The resultant force acting on node i;

[0065] Area coverage rate:

[0066] C(A) = 1 / n∑ i＝1 nc i (A)

[0067] where c i (A) is the coverage rate of node i in area A.

[0068] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0069] 1. By simulating the real construction environment and operation process, the present invention effectively improves the safety awareness and operation skills of construction workers. Workers can repeatedly practice in a safe environment and proficiently master various safety operation procedures and emergency handling processes.

[0070] 2. Compared with the traditional virtual reality training platform, the present invention can not only enhance the safety awareness of construction personnel, but also bring higher efficiency and lower risk to construction site management, reduce the training cost, and improve the pertinence and effectiveness of training.

[0071] 3. The immersive training method adopted by the present invention enables workers to more deeply remember safety knowledge and operation specifications, thereby reducing the occurrence of safety accidents in actual construction. Brief Description of the Drawings

[0072] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects, and advantages of the present invention will become more apparent:

[0073] Figure 1 is the flow chart of the present invention. Detailed Embodiments

[0074] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0075] Embodiment 1: A virtual reality training platform for improving the vocational skills of construction workers, see Figure 1 , including a process simulation training system: used to display the construction process flow of building foundation engineering, main structure engineering, decoration engineering, and building construction survey engineering;

[0076] A virtual simulation software system: used to highly restore the training scene, make the entire construction process visual, and feedback drawings, specifications, theoretical questions, and animation resources in combination with the actual job skill requirements;

[0077] VR Experience System: It is used to create virtual training scenarios by using VR technology, simulate and restore common accident types in construction, and enable workers to have an immersive experience with a high sense of reality;

[0078] The process simulation training system includes:

[0079] Virtual Construction Scene Simulation Module: It is used to simulate real construction scenes through 3D modeling technology based on a virtual 3D environment;

[0080] Construction Engineering Operation Module: It is used to provide simulations of various construction engineering operations such as foundation construction, structural construction, and decorative construction;

[0081] Problem Solving Module: It is used to simulate common problems in construction engineering, such as difficulties encountered during construction and adjustments to construction techniques;

[0082] Team Collaboration Module: It is used to encourage construction workers to cooperate in teams and simulate team cooperation scenarios in construction engineering;

[0083] Assessment and Evaluation Module: It is used to evaluate and assess construction workers based on their performance in virtual training, including the accuracy of construction operations, problem-solving abilities, and teamwork aspects;

[0084] The virtual simulation software system includes:

[0085] Virtual Environment Creation Module: Using a computer, a realistic terrain model is created through a 3D terrain generation algorithm, and then virtual sensor nodes are deployed using a 3D coverage algorithm to monitor and cover the terrain model, generating a virtual 3D environment; In the example of this application, the virtual construction scene simulation module relies on the virtual environment creation module to build a realistic construction environment.

[0086] Multi-Sensory Interaction Experience Module: It is used to provide a 3D interface for construction workers to interact with the virtual world. Through auxiliary sensing devices such as head-mounted displays and eyepieces, construction workers can perceive the role and changes of simulation objects in the surrounding environment, thus generating a sense of immersion;

[0087] Highly Restored Training Scene Module: Taking the actual construction scene as a template, the training content of each type of work is integrated into the construction scene created by the virtual construction scene simulation module to ensure a high degree of restoration of the training content;

[0088] Case Resource Module: It is used to divide training steps according to national occupational skill standards to ensure that the training content is closely linked to job skills;

[0089] "Learning, practice and assessment" integrated module: used to integrate learning, training and assessment. Through interactive functions such as animation control and interactive questions, it enhances the interaction between teachers and students and improves the effect of classroom training;

[0090] The VR experience system includes:

[0091] Graphics workstation: used to process complex graphics rendering and computing tasks to ensure that users can immerse themselves in a realistic virtual construction environment;

[0092] Front-end experience device: used for construction workers to enter a virtual construction site scene, restoring the complex environment of the construction site and the real process of operations;

[0093] High-definition display system: realized through VR helmet display devices. After workers wear VR helmets, they can be on the scene of the construction site as if they were there;

[0094] Voice system: able to provide real-time feedback and prompts according to the operations of users and the changes in the virtual construction environment;

[0095] Induction system: used to utilize virtual reality technology, combined with various sensors and somatosensory simulation devices, such as VR helmets and handles, to capture the motion and position information of construction workers;

[0096] Auxiliary equipment: used to simulate various safety scenarios at the construction site.

[0097] The virtual reality training platform for improving the professional skills of construction workers described in this application provides an immersive and highly interactive training experience through the collaborative work of multiple technical modules. The virtual reality training platform is mainly composed of a process simulation training system, a virtual simulation software system and a VR experience system. The process simulation training system creates realistic virtual construction scenes through 3D modeling technology. Workers can perform various construction operation exercises in these virtual scenes through the construction engineering operation module, including foundation construction, structural construction and decoration construction, etc. The problem-solving module and the team collaboration module are used to help workers learn how to adjust the process and solve problems, and cultivate the ability of collaboration between workers, thereby providing sufficient preparation for the actual operation of daily construction sites. Combined with the real-time monitoring of workers' operations by the assessment and evaluation module, their operation accuracy, problem-solving ability and teamwork performance are evaluated to ensure effective feedback on the training effect and make the training more Targeted; the virtual simulation software system generates a three-dimensional environment through the virtual environment creation module, allowing workers to experience the construction site in an immersive way, and through the multi-sensory interactive experience module, workers can interact with the virtual environment and perceive subtle changes in construction, enhancing the immersiveness and realism of learning, and then through highly restored training scenes and rich case resource modules, workers can conduct targeted training according to national vocational skill standards to ensure accurate mastery of skills; the VR experience system supports the rendering of complex images through a graphics workstation, and cooperates with a high-definition display system and a sensing system to provide a real experience, while the setting of the front-end experience equipment and voice system helps workers understand the necessary safety information before entering the virtual construction site, further enhancing the training effect.

[0098] The virtual reality training platform for improving the professional skills of construction workers described in this application effectively improves the safety awareness and operational skills of construction workers through highly simulated construction scene simulation and immersive multi-sensory interactive experience. It integrates the "learning, practicing and testing" integrated module, integrating learning, practical training and assessment, so that workers can continuously verify their skills in practice, ensuring that the knowledge learned can be truly transformed into practical operational capabilities. Workers can practice repeatedly in a safe environment and master various safety operating procedures and emergency handling processes. Compared with traditional training methods, it greatly improves the attractiveness and effectiveness of learning, reduces training costs, improves the effectiveness and pertinence of training, and ultimately significantly improves the professional skills and safety awareness of construction workers.

[0099] Specifically, the construction scene can simulate construction scenes such as construction sites, material warehouses, and mechanical equipment. Construction workers can perform various common construction operations in the virtual environment, such as foundation pit excavation, concrete pouring, and wall construction.

[0100] As a preferred example of this application, the virtual environment creation module can simulate real construction scenarios in construction trade training. For example, in an indoor factory training center, the training content of each trade is integrated into the virtual 3D environment in a 1:1 ratio, and the entire construction process is visualized.

[0101] In the construction trade training, the multi-sensory interaction experience module enables construction workers to simulate various tools through mouse operations for experiments. At the same time, it provides excellent picture quality and realistic lighting effects, allowing construction workers to practice construction operations as if they were on-site, thus enhancing the training interaction experience.

[0102] In the example of this application, the platform uses 3D modeling technology to create real building scenes. All scene elements, such as terrain, building structures, construction materials, and equipment, are carefully designed to ensure a high degree of restoration of the actual construction environment. Through the virtual construction site, workers can freely operate various construction tools for practical operation training. Operations in the virtual scene, such as foundation trench excavation and concrete pouring, involve the use of different construction tools and the execution of process flows. In a highly interactive way, construction workers can practice these operations without safety risks, improving their proficiency in construction processes and safety awareness. At the same time, the platform also simulates the use of material warehouses and mechanical equipment. Workers can experience the process of fetching materials from the warehouse and the correct use of equipment in construction operations in the virtual environment, ensuring that every link is accurate. Through the highly restored virtual environment of the construction site, material warehouses, and mechanical equipment, construction workers can practice operations in a real and interactive virtual environment, not only improving the accuracy of operation skills but also helping workers better understand and master construction processes.

[0103] Furthermore, the training content includes training for welders, steelworkers, concrete workers, and scaffolders, enabling construction workers to immerse themselves in the virtual 3D environment to observe and operate various construction tools and equipment.

[0104] It is worth noting that the graphics workstation, combined with VR helmets and interaction devices, jointly creates a multi-sensory virtual construction environment. After wearing the VR helmet, users can immerse themselves in various construction scenarios and safety accidents, such as working at heights and mechanical operations. Through the interaction device, users can also interact with objects in the virtual environment, simulating operations such as using fire extinguishers and experiencing helmet impacts, thereby enhancing safety awareness and preventive capabilities.

[0105] The front-end experience device mainly includes interactive devices such as VR helmets and handles; construction workers wear VR helmets and experience the serious consequences of different safety accidents from the first-person perspective, such as high-altitude falls, collapses, object strikes, mechanical injuries, electric shocks, etc., so as to deeply understand the importance of safety risks and operating procedures. At the same time, brief interactive questions about accident causes, preventive measures, etc. will be interspersed during the experience. Construction workers can use devices such as handles for interaction to further enhance safety awareness and master necessary preventive knowledge and emergency measures;

[0106] The high-definition display system is usually combined with the gesture input system and the three-dimensional voice system to enhance the sense of participation and learning effect of construction workers. Through the interactive device, construction workers can operate in the virtual world, simplify and visualize abstract safety concepts, so as to more effectively master safety knowledge and response skills;

[0107] The voice system will provide real-time feedback and prompts according to the user's operations and changes in the virtual environment, such as "Please note that you are about to enter the high-altitude operation area. Please ensure that you wear safety equipment";

[0108] The induction system can simulate various construction scenarios, such as high-altitude operations, mechanical operations, electric shocks, etc., making construction workers seem to be in a real construction environment. During the experience, once construction workers "trigger" certain dangerous situations, such as accidentally touching an electric wire, improper operation, etc., the induction system will immediately react and transmit danger signals to construction workers through multiple sensory channels such as vision, hearing, and touch. For example, in the electric shock experience, construction workers may feel a real tingling sensation, which is a precise simulation of the physiological reaction of current passing through the body through special induction devices;

[0109] The auxiliary equipment mainly includes VR helmets, VR handles, display screens, hosts, intelligent walking platforms, 9D interactive space capsules, etc., which assist in simulating the real safety scenarios of the construction site and enhancing the realism in the virtual environment and the interactivity of operation training for construction workers;

[0110] VR helmets and VR handles are the key devices for users to enter the virtual environment. They provide an immersive experience, making users seem to be in a real construction site. The display screen is used to display the virtual environment, enabling users to clearly see various safety scenarios and operation details. The host is the core of the entire system, responsible for processing data such as images and sounds to ensure the smoothness and realism of the virtual environment.

[0111] It should be noted that simulating real construction scenarios through 3D modeling technology includes the following steps:

[0112] First, use high-precision measuring instruments (such as GNSS-RTK, total station) and photographic equipment (such as digital cameras, oblique photography cameras carried by drones, lidar scanning systems, etc.) to measure and photograph the real scene, and obtain detailed data of elements such as terrain, buildings, and vegetation;

[0113] Process the collected data, including image denoising, color correction, texture mapping, etc., to improve the realism of the 3D model. At the same time, use fast image matching technology or laser scanning technology to generate DOM (Digital Orthophoto Map) and DSM (Digital Surface Model), providing basic data for 3D modeling;

[0114] Use 3D modeling software (such as 3DSMax, Maya, Sketch Up, ContextCapture, etc.) to convert the processed data into a 3D model. During the modeling process, according to the characteristics and requirements of the actual scene, continuously adjust and optimize the structure and texture of the model to make it as close as possible to the actual scene;

[0115] After completing the construction and optimization of the 3D model, it can be imported into game engines, virtual reality devices or other software platforms for application. Users can interact with the 3D model through virtual reality devices (such as head-mounted displays) to achieve an immersive effect, so as to better simulate the real building construction scene.

[0116] It is worth introducing that generating a virtual 3D environment by computer includes the following steps:

[0117] First, it is necessary to clarify the theme, purpose and style of the virtual environment, and design the overall layout, color scheme and atmosphere of the environment;

[0118] Use 3D modeling software (such as Blender, 3ds Max, Maya, SketchUp, etc.) to create each object in the environment. These objects may include buildings, terrain, vegetation, furniture, people, etc.;

[0119] Apply textures and materials to the models to make them look more real and detailed. Textures can be photos, hand-drawn patterns or procedurally generated patterns;

[0120] Add lights to the environment to simulate the lighting effects of the real world, adjust the color, intensity and position of the lights to create the desired atmosphere, calculate and apply shadows to enhance the depth and realism of the scene;

[0121] If necessary, add animation effects to the objects in the environment, such as the movement of people, the rotation of objects, etc. For interactive environments, it is also necessary to write code to handle user input and feedback;

[0122] Use a rendering engine (such as Unity, Unreal Engine, etc.) to convert a 3D scene into a 2D image or video, and adjust rendering settings such as resolution, frame rate, anti-aliasing, etc. to obtain the best results;

[0123] Test the virtual environment on different devices and platforms to ensure its performance and compatibility, and make necessary optimizations according to the test results, such as reducing the polygon count of models, optimizing textures and lighting, etc.;

[0124] Publish the virtual environment to appropriate platforms or channels, such as game platforms, social media, websites, etc., share the virtual environment with users, and collect feedback for further improvement.

[0125] It is worth emphasizing that the 3D terrain generation algorithm is specifically a 3D terrain generation method for virtual environments, which adds multi-level details to the terrain through the diamond-square iteration process;

[0126] The 3D coverage algorithm is specifically a 3D coverage algorithm related to region division and virtual force, which is used for node coverage in 3D wireless sensor networks. By introducing an attraction source, it reduces coverage holes and lowers network energy consumption;

[0127] The formula for the 3D terrain generation algorithm is:

[0128] Diamond processing stage:

[0129] The formula for calculating the height value of the midpoint M:

[0130] M i,j = 41(F i,j + F i+1,j + F i,j+1 + F i+1,j+1 ) + Std × K × 2d - i(3 - D)

[0131] where Std is a normally distributed random number with a mean of 0 and a standard deviation of 1; K is the amplitude coefficient; i is the current iteration number; D is the fractal dimension, and its value range is [2.3, 3.0];

[0132] Square processing stage:

[0133] The formula for calculating the height value of the midpoint of each side of the square (taking one side as an example):

[0134] M i,j = 21(M i,j + M i+1,j ) + Std × K × 2d - i(3 - D)

[0135] Similarly, the height values of the midpoints of the other three sides can also be calculated through similar formulas;

[0136] The formula for the three-dimensional coverage algorithm is as follows:

[0137] The gravitational force of the attracting source on the node:

[0138]

[0139] Among them, k is the gravitational coefficient; (x, y, z) are the coordinates of the node; (xg, yg, zg) are the coordinates of the attracting source;

[0140] The mobile energy consumption of the entire network:

[0141] E = ∑ i＝1 n∣E i ×tan(F i )×2∣

[0142] Among them, E i is the mobile energy consumption of node i; F i is the resultant force on node i;

[0143] Area coverage rate:

[0144] C(A) = 1 / n∑ i＝1 nc i (A);

[0145] Among them, c i (A) is the coverage rate of node i in area A.

[0146] The virtual reality training platform for the improvement of construction workers' professional skills described in this application provides a comprehensive training environment for construction workers through the collaborative work of a virtual simulation software system, a VR experience system, and a process simulation training system. The process simulation training system creates a virtual construction scene through 3D modeling technology, where workers can simulate various construction operations. The virtual construction scene simulation module enables workers to conduct operation training in an environment without safety risks and practice through the construction engineering operation module. The virtual simulation software system uses a three-dimensional terrain generation algorithm to establish a realistic construction scene through the virtual environment creation module and simulates a sensor network through the three-dimensional coverage algorithm to ensure that construction workers can fully understand the details of the construction scene in the virtual environment. Workers can simulate various operations and common accidents on construction sites through the VR experience system and have an immersive experience in the VR environment to learn how to handle various safety issues, thereby improving their safety awareness and operation skills. The virtual reality training platform for the improvement of construction workers' professional skills described in this application greatly improves the professional skills of workers and their understanding of safety operation specifications through a full-range immersive experience, can bring higher efficiency and lower risks to construction site management, reduces training costs, improves the pertinence and effectiveness of training, and reduces the probability of safety accidents occurring in actual construction.

[0147] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For a person skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present invention. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0148] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A virtual reality training platform for improving construction workers' professional skills, featuring: Including process simulation training system: used to show the construction process of building foundation engineering, main structure engineering, decoration and renovation engineering and building construction measurement engineering; Virtual simulation software system: used to highly restore the training scene, visualize the entire construction process, and provide drawings, specifications, theoretical questions and animation resources in combination with actual job skill requirements; VR experience system: used to use VR technology to create virtual training scenarios and simulate various types of accidents in buildings, allowing workers to have a highly realistic immersive experience.

2. The virtual reality training platform for improving construction workers' professional skills according to claim 1 is characterized by: The process simulation training system comprises: Virtual construction scene simulation module: used to simulate real construction scenes through 3D modeling technology based on a virtual three-dimensional environment. The construction scene can simulate the construction scene of the construction site, material warehouse and mechanical equipment. Construction workers perform construction simulation operations in the virtual scene. Construction engineering operation module: used to provide simulation operations of foundation construction, structure construction and decoration construction; Problem Solving Module: used to simulate the problems encountered in construction projects and adjust the construction process; Teamwork module: used to simulate teamwork scenarios in construction projects; Assessment and evaluation module: used to evaluate and assess the performance of construction workers in virtual training.

3. The virtual reality training platform for improving construction workers' professional skills according to claim 1 is characterized by: The virtual simulation software system comprises: Virtual environment creation module: Use a computer to create a realistic terrain model using a three-dimensional terrain generation algorithm, and then use a three-dimensional coverage algorithm to deploy virtual sensor nodes to monitor and cover the terrain model and generate a virtual three-dimensional environment; Multi-sensory interactive experience module: used to provide users with a three-dimensional interface for interacting with a virtual three-dimensional environment through auxiliary sensor devices; Highly restored training scene module: Using the actual construction scene as a template, the training content of each type of work is integrated into the construction scene created by the virtual construction scene simulation module to ensure a high degree of restoration of the training content; Case resource module: divide the practical training steps according to the national vocational skill standards to ensure that the practical training content is closely linked to job skills; "Learning, Practice and Examination" integrated module: used to integrate learning, practical training and examination, and enhance the interaction between teachers and students through interactive functions; The virtual environment creation module can simulate real construction scenes in construction work training, and integrate the training content of each work type into the virtual three-dimensional environment in a 1:1 ratio, so that the entire construction process can be visualized; In the construction work training, the multi-sensory interactive experience module allows construction workers to simulate various tools for experiments through mouse operation, while providing excellent picture texture and real light and shadow effects, allowing construction workers to practice construction operations as if they were on site, thus improving the interactive training experience; The training content includes training for welders, rebar workers, concrete workers and scaffolders, allowing construction workers to immerse themselves in a virtual three-dimensional environment to observe and operate various construction tools and equipment.

4. The virtual reality training platform for improving construction workers' professional skills according to claim 1 is characterized by: The VR experience system includes: Graphics workstation: used to handle complex graphics rendering and computing tasks, ensuring that users can immerse themselves in a realistic virtual construction environment; Front-end experience equipment: used for construction workers to enter a virtual construction scene, restore the complex environment of the construction site and the real process of operation; High-definition display system: realized through VR helmet display equipment; Voice system: can provide real-time feedback and prompts based on user operations and changes in the virtual construction environment; Sensing system: Combine sensors and somatosensory simulation equipment to capture the movement and position information of construction workers; Auxiliary equipment: used to simulate safety scenarios at construction sites.

5. The virtual reality training platform for improving construction workers' professional skills according to claim 4 is characterized by: The graphic workstation is interactively combined with the VR helmet to jointly create a multi-sensory virtual construction environment; Front-end experience devices include VR helmets and interactive devices such as handles; The high-definition display system is combined with the gesture input system and the 3D voice system to enhance the construction workers’ sense of participation and learning effect; The induction system simulates construction scenes of aerial work, mechanical operation and electric shock; Auxiliary equipment includes display screen, host, intelligent walking platform and 9D interactive space capsule.

6. The virtual reality training platform for improving construction workers' professional skills according to claim 2 is characterized by: The 3D modeling technology simulates the real construction scene and includes the following steps: S1: Use high-precision measuring instruments and photographic equipment to measure and photograph real-world scenes to obtain detailed data on terrain, buildings, and vegetation elements; S2: Processing the collected data, including image denoising, color correction and texture mapping, to improve the realism of the 3D model. At the same time, using fast image matching technology or laser scanning technology to generate DOM and DSM, providing basic data for 3D modeling; S3: Use 3D modeling software to convert the processed data into a 3D model.

7. The virtual reality training platform for improving construction workers' professional skills according to claim 3 is characterized by: The computer generates a virtual three-dimensional environment comprising the following steps: ST1: Define the theme, purpose and style of the virtual environment, and design the overall layout, color scheme and atmosphere of the environment; ST2: Use 3D modeling software to create objects in the environment; ST3: Apply textures and materials to the model; ST4: Add lights to the environment to simulate real-world lighting effects, adjust the color, intensity, and position of lights to create the desired atmosphere, and calculate and apply shadows to enhance the depth and realism of the scene; Use a rendering engine to convert a 3D scene into a 2D image or video and adjust rendering settings; Test your virtual environment on different devices and platforms to ensure performance and compatibility, and optimize based on the test results.

8. The virtual reality training platform for improving construction workers' professional skills according to claim 7, characterized in that; The three-dimensional terrain generation algorithm is a three-dimensional terrain generation method for virtual environments, which adds multiple levels of details to the terrain through a diamond-square iterative process; The three-dimensional coverage algorithm is a three-dimensional coverage algorithm related to area division and virtual force. It is used for node coverage of three-dimensional wireless sensor networks. It reduces coverage holes and reduces network energy consumption by introducing attraction sources.

9. The virtual reality training platform for improving construction workers' professional skills according to claim 8 is characterized by: The three-dimensional terrain generation algorithm formula is: Diamond processing stage: The calculation formula for the height of the midpoint M is: M i,j =41(F i,j +F i+1,j +F i,j+1 +F i+1,j+1 )+Std×K×2d-i(3-D) Among them, Std is a normal distribution random number with a mean of 0 and a standard deviation of 1; K is the amplitude coefficient; i is the current number of iterations; D is the fractal dimension, and the value range is [2.3,3.0]; Square processing stage: The formula for calculating the height of the midpoints of the four sides of the square is: M i,j =21(M i,j +M i+1,j )+Std×K×2d-i(3-D)。 10. The virtual reality training platform for improving construction workers' professional skills according to claim 8 is characterized by: The three-dimensional covering algorithm formula is: The gravitational force of the node on the source of attraction: Among them, k is the gravitational coefficient; (x, y, z) is the coordinate of the node; (xg, yg, zg) is the coordinate of the attraction source; Mobile energy consumption of the entire network: E=∑ i＝1 n∣E i ×tan(F i )×2∣ Among them, E i is the mobile energy consumption of node i; F i is the resultant force on node i; Regional coverage: C(A)=1 / n∑ i＝1 nc i (THE) Among them, c i (A) is the coverage rate of node i in area A.

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