Flood prevention and emergency rescue training method for Yellow River professional emergency team

Abstract

The invention relates to a flood prevention and emergency rescue training method for a Yellow River professional emergency team, which belongs to the technical field of emergency rescue in hydraulic engineering and has IPC (International Patent Classification) numbers of E02B 1 / 00 and E02B 3 / 12. The training method comprises the steps that the structure of a lead wire gabion is improved, ground features and landforms are collected, the flood prevention and emergency rescue simulation training system is constructed, and simulation training is conducted on the Yellow River professional emergency team through the training system. According to the invention, the UE5 engine is adopted to construct an emergency rescue environment with a vivid scene, the technical problem that major dangerous cases are difficult to set manually is solved, and the Yellow River professional emergency rescue team members are subjected to whole-process simulation training, so that the emergency rescue team members can be familiar with an emergency rescue scheme, experience and are familiar with operation key points and dare to operate in actual emergency rescue.

Description

Technical field:

[0001] The invention relates to a flood prevention and rescue training method for a Yellow River professional rescue team, belonging to the technical field of flood prevention and rescue in water conservancy projects, and its IPC international patent classification number is E02B 1 / 00 ​​and E02B 3 / 12. Background technology:

[0002] The flow of the lower Yellow River is changeable. In order to guide the river and protect the levee, a large number of dangerous works and control projects have been built along the river. During the main flood season, when the mainstream is blocked by the dam, the water flow is divided into three parts. One flows down along the dam, one flows upstream against the dam, and the other flows under the dam. The latter two flows form a backflow after they are combined. Due to the imbalance of sand transport, irregular scour pits are formed on the riverbed. When the depth of the scour pit exceeds the depth of the root stone foundation of the dam, the dam will collapse and cause danger. After the project is scoured by a large flow or a large flow, the dangers that are prone to occur on the dam are generally the loss of root stones, partial collapse of flat stones, and hibernation under the flat stone slope. After the above-mentioned dangers occur, the traditional rescue method generally uses throwing blocks of stone or willow stone pillows to rescue and maintain the underwater dam foundation. However, since the thrown stones are a single structure, they will be carried away by the water under the impact of the current; although the willow stone pillow is a whole, it needs to be tied on site, which is slow, and the willow stone pillow has fewer stones, and the overall volume and weight are not large, making it difficult to quickly contain the dangerous situation.

[0003] With the vigorous development of the economy, the continuous improvement of Yellow River flood control and rescue technology and equipment, automated and mechanized rescue has become the main rescue means of the Yellow River professional rescue team. At present, mechanical throwing of gabion nets has become the main means of rescue. Stones are packed in wire mesh, tied together, and thrown into dangerous sections. The cage is not easily impacted by the water flow, which serves the purpose of strengthening the foundation. The combination of large-scale machinery and traditional rescue technology is the main trend of future flood control and rescue development. The Yellow River professional mobile rescue team must further strengthen the training of large-scale machinery rescue skills, give full play to the rescue efficiency of large-scale construction machinery, and further improve the actual combat capability and rapid response capability.

[0004] Practice has shown that even skilled excavator operators will not be able to perform actual operations during rescue operations if they have not received training in loading, lifting and throwing wire cages.

[0005] Routine professional knowledge training and practical operation training are effective means to train professional rescue team members. The prior application CN108717812A discloses a flood control and rescue drill base, which artificially creates various common dangerous situations for training rescue team members. However, due to the huge amount of dam engineering, it takes a lot of manpower, material resources and time to build a physical dam for rescue training, and it also consumes a lot of precious water resources to create various dangerous situations on the spot, which makes it difficult for most professional rescue team members to get operational training for real rescue scenarios.

[0006] With the advancement of technology, virtual emergency drills have begun to be used in the field of emergency drills. For example, China's prior applications CN106601060A and CN117316012A use computer graphics and simulation technology in the fields of firefighting and road emergency rescue, respectively. By building realistic disaster scenes in virtual environments and simulating emergency rescue operations, emergency personnel can effectively improve the response speed and efficiency in actual operations, solving the problems of large investment, long time consumption, and environmental pollution in practical training. Building a realistic operating space in a virtual drill environment involves interactions between rigid bodies and obstacles, as well as dynamic simulations of various deformable objects such as wire gabions and ropes. The physical simulation modeling of these objects is crucial to enhancing the realism and interactivity of virtual scenes.

[0007] Position-based Dynamics (PBD) is an effective method to solve the problem of physical simulation modeling of deformable objects in virtual scenes. PBD provides a stable and efficient simulation framework for the behavior of deformable objects by imposing position constraints on particles or elements in the simulation. However, this method is currently mostly used for the simulation of fully elastic bodies that can deform as a whole, such as human bodies and fabrics. The wire mesh gabions used in flood control and rescue are rigid bodies during the stone filling stage, and they will undergo limited deformation when hoisted. They are different from rigid bodies and fully elastic bodies such as human tissues and fabrics. Therefore, there are currently no physical simulation modeling cases related to wire mesh gabions. Summary of the invention:

[0008] The purpose of the present invention is to provide a flood prevention and rescue training method for the Yellow River professional rescue team. The technical solution of the present invention is as follows:

[0009] A flood prevention and rescue training method for a Yellow River professional rescue team, characterized in that it comprises the following steps:

[0010] S01: Use a new type of rectangular wire mesh gabion as the main rescue equipment, and the ratio of the width to the height of the wire mesh gabion is not less than 1.5;

[0011] S02: Collect data on the landforms and features within the jurisdiction; systematically collect topographic data of riverbeds, dams and roads within the jurisdiction through drone aerial photography, ground 3D scanning and field measurements, and obtain their geometric parameters and physical properties; accurately count the quantity of various emergency materials and their storage locations; conduct on-site environmental surveys and collect information on hydrological characteristics and vegetation distribution;

[0012] S03: Building a flood prevention and rescue simulation training system based on the UE5 engine; the flood prevention and rescue simulation training system includes a hazard setting subsystem, a scenario simulation subsystem and an operation interaction subsystem;

[0013] The danger setting subsystem includes a water information module, a danger selection module and a rescue plan setting module; wherein the water information module provides water information of various dams at various levels of flow; the danger selection module includes common major dangers of dams for trainees to choose; the rescue plan setting module includes rescue material selection, rescue material usage calculation, rescue scheduling and rapid writing of construction plans;

[0014] The scenario simulation subsystem includes a three-dimensional terrain simulation module and a wire mesh gabion simulation rendering module;

[0015] The three-dimensional terrain simulation module includes three-dimensional simulation scenes of dam projects in various locations within the jurisdiction when they are not in danger and when various dangers occur, as well as three-dimensional scenes of various emergency equipment in storage areas;

[0016] The wire gabion simulation rendering module uses a position-based dynamics method (PBD) to perform physical simulation modeling on the wire gabion; the specific method is as follows:

[0017] S031. Discretize the stones, lifting ropes and wire gabions into particle sets; the stones are particleized by direct scattering method, and particles are evenly distributed on the polygonal surface of each stone according to the area ratio; the lifting ropes are evenly placed along the length of the particles, and are linearly arranged along the center line of the lifting ropes; the wire gabions are discretized by mesh structure distribution method, and particle points are placed in the middle and end of each grid intersection;

[0018] S032. Construct PBD constraints based on the deformation characteristics of stones, lifting ropes and wire gabions;

[0019] Among them, during the stone filling stage, the stone particle set is subject to collision constraints, the lifting rope is subject to distance constraints and bending constraints, and the wire gabion is subject to distance constraints and shape matching constraints;

[0020] During the hoisting stage, the wire gabion is divided into three areas from left to right: left area, middle area and right area, with the position of the hoisting rope on the wire gabion as the boundary. The left and right areas undergo elastic deformation, and their particles are subject to distance constraints, shape matching constraints and collision constraints; the middle area undergoes only slight deformation and is regarded as a rigid body, and its particles are subject to collision constraints;

[0021] S033. Solve the constraint equations to obtain a new position and velocity of the particle that satisfies all constraint conditions;

[0022] S034. Use the renderer of the UE5 particle system for rendering; use the mesh renderer to render the stones, and use the strip renderer to render the lifting ropes and wire gabions;

[0023] The operation interaction subsystem includes a wire gabion filling interaction module, a wire gabion hoisting interaction module, a wire gabion throwing interaction module and a position detection and scoring module; wherein,

[0024] The wire gabion filling interactive module is used to train trainees to fill wire gabions with stones; the wire gabion hoisting interactive module is used to train trainees to use construction machinery to lift wire gabions and transport them to dangerous locations; the wire gabion throwing interactive module is used to train trainees to throw wire gabions to the correct location; the position detection and scoring module is used to detect the construction accuracy and construction time of trainees at each stage of filling, hoisting and throwing, and compare them with the pre-calibrated standard position and standard time, and give corresponding scores;

[0025] S04: The trainees enter the flood prevention and emergency rescue simulation training system and conduct full-process simulation training;

[0026] S041, trainees first learn and familiarize themselves with flood prevention plans, then select the type of dangerous situation according to the training requirements, combine water information, select the corresponding emergency rescue machinery and materials, calculate the number of emergency rescue personnel, construction machinery, and wire mesh gabions required, and quickly write emergency rescue dispatch and construction plans;

[0027] S042, enter the operation interaction subsystem to practice the gabion filling, lifting and throwing operations; use the mouse or VR handle to place the empty gabion in the appropriate position, then grab two lifting ropes and place them on both sides of the lower part of the gabion, and finally drag the stones to the appropriate position in the gabion until the filling is completed; use the mouse or VR handle to grab and stretch the lifting ropes on both sides of the lower part of the gabion, tie them to the gabion, and then use the mouse or VR handle to control the construction machinery and lift it to the dangerous part of the dam; adjust the throwing position and throwing angle of the construction machinery to throw the gabion into the dangerous part.

[0028] Preferably, the danger setting subsystem also includes a Web map module, and various dams, emergency material storage areas, and traffic roads within the jurisdiction are marked on the Web map.

[0029] Preferably, before step S041, the method further includes: the trainees view the dam projects and traffic routes within the jurisdiction through the Web map module.

[0030] Preferably, the operation interaction subsystem is constructed based on a UE5 editor.

[0031] Preferably, the positions detected by the position detection and scoring module specifically include: in the loading stage, detecting the position where the trainees place the lifting rope at the bottom of the wire cage and the position where the stones are placed in the wire cage; in the lifting stage, detecting the walking route and the final parking position of the trainees during lifting; in the casting stage, detecting the casting position of each wire cage.

[0032] The Yellow River professional rescue team flood prevention and rescue training method of the present invention is inventive in the following aspects:

[0033] (1) The present invention uses the UE5 engine to construct a realistic rescue environment, which once and for all solves the technical problem of difficulty in manually setting up major dangerous situations. By conducting full-process simulation training for professional rescue team members of the Yellow River, the rescue team members can become familiar with the rescue plan, experience and become familiar with the key points of operation, and dare and know how to operate in actual rescue operations.

[0034] (2) Use flat wire mesh gabions with a width to height ratio of no less than 1.5. The wire mesh gabions have good integrity, can hold a large amount of gravel, are easy to lift, have a large plane projection area, and can cover a large area of ​​danger after being thrown. They can quickly cover the danger area, which is conducive to achieving the rescue principle of "early rescue and small rescue".

[0035] (3) The PBD method is used to simulate the entire process of gabion loading, lifting and throwing, which fully considers the interaction between stones, lifting ropes and gabion and the resulting deformation, thus improving the accuracy and stability of the simulation.

[0036] (4) According to the structure and deformation characteristics of the flat wire mesh gabion adopted by the present invention, multi-region dynamic simulation of the wire mesh gabion is performed, and the simulation effect is closer to the real scene, thereby improving the authenticity and immersion of the training. Description of the drawings:

[0037] Figure 1 It is a flow chart of the flood prevention and emergency rescue training method of the present invention;

[0038] Figure 2 This is a diagram of the flood prevention and emergency rescue simulation training system architecture of the present invention;

[0039] Figure 3 It is a flow chart of wire gabion simulation rendering of the present invention;

[0040] Figure 4 It is a side view of a wire gabion of the present invention.

[0041] In the figure, 1 is the left area, 2 is the middle area, 3 is the right area, and 4 is the lifting rope. Specific implementation method:

[0042] The present invention is described in detail with reference to the accompanying drawings.

[0043] A flood prevention and rescue training method for a Yellow River professional rescue team of the present invention comprises the following steps:

[0044] S01: Use a new type of flat rectangular wire gabion as the main rescue equipment. Wire gabions are widely used in flood control and rescue and slope protection construction. At present, gabion nets are used for flood control and rescue. First, a piece of wire mesh is placed on the ground, gravel is placed on it, and then a piece of wire mesh is covered on the gravel. Then, the upper and lower wire meshes are tied together with ropes or wires to make a gabion net bag, which is thrown at the dangerous part. This kind of gabion net bag wraps less gravel, and it is easy for gravel to fall from the gap between the two pieces of wire mesh during lifting. It is also difficult to tie it firmly on site. It is easy for one or more places to scatter during lifting, which greatly reduces the gravel thrown into the water, and even causes safety accidents such as injuries. In slope protection construction, a rectangular wire cage is used. That is, multiple pieces of wire mesh are folded together to form a rectangular mesh box, which is placed at the construction site, filled with gravel, and covered with a wire mesh as a lid. In order to ensure the stability of the wire cage, good slope protection effect and fast construction speed, this type of wire cage is generally high and has a large overall volume and cannot be used for mechanical lifting.

[0045] The wire gabion used in the present invention is different from the wire gabion used in slope protection construction and the existing gabion net bag. The wire gabion of the present invention is also a rectangular mesh box that can be folded to combine multiple wire mesh sheets. The length-to-height ratio and width-to-height ratio are high, the length is 3-6 meters, the width is 1-2 meters, and the height is 0.6-1 meters. That is to say, the present invention uses a flat rectangular wire gabion, that is: the width of the wire gabion is greater than the height; preferably, the ratio of the width to the height of the wire gabion is not less than 1.5. The wire gabion of the present invention has good integrity, will not fall apart, is easy to hoist, has a large amount of crushed stone wrapped, a large plane projection area, and a large area covered after being thrown. It can quickly cover the dangerous part, which is conducive to realizing the rescue principle of "early and small".

[0046] S02: Collect data on the landforms and features within the jurisdiction. Through drone aerial photography, ground 3D scanning technology and field measurements, systematically collect topographic data of riverbeds, dams and roads within the jurisdiction to obtain their geometric parameters and physical properties; accurately count the number of various emergency materials such as wire cages, stones, ropes and emergency vehicles and their storage locations; conduct on-site environmental surveys to collect information such as hydrological characteristics and vegetation distribution.

[0047] S03: Build a flood prevention and rescue simulation training system based on the UE5 engine. Figure 2As shown, the flood control and emergency rescue simulation training system of the present invention includes a hazard setting subsystem, a scenario simulation subsystem and an operation interaction subsystem. The hazard setting subsystem includes a water condition information module, a hazard selection module and an emergency rescue plan setting module; wherein, the water condition information module provides water condition information of various dams at various levels of flow. The hazard selection module includes common major hazards of dams such as root stone loss, dam pile collapse, embankment collapse and embankment breach for selection by trainees. The emergency rescue plan setting module includes emergency rescue material selection, emergency rescue material usage calculation, emergency rescue scheduling and rapid writing of construction plans. The water condition information, hazard selection and emergency rescue plan involved in the hazard setting subsystem can be set according to the user's flood control plan.

[0048] Furthermore, the hazard setting subsystem also includes a Web map module, which marks the various dams, emergency material storage sites, and traffic roads within the jurisdiction collected in step S02 on the Web map. By clicking on the name of the relevant dam on the Web map, the clicked dam is displayed in three-dimensional simulation.

[0049] The scenario simulation subsystem includes a three-dimensional terrain simulation module and a wire mesh gabion simulation rendering module.

[0050] Among them, the three-dimensional terrain simulation module includes three-dimensional simulation scenes of dam projects in various locations within the jurisdiction when they are not in danger and when various dangerous situations occur, as well as three-dimensional scenes of various emergency equipment in storage locations.

[0051] When performing 3D terrain simulation modeling, the high-definition images and measurement data collected in step S02 are used to create a 3D simulation scene using the 3D modeling software 3D Max. Through the precise application of materials and textures, it is ensured that the 3D model is not only highly realistic visually, but also accurately reflects the influence of various environmental factors in physical interaction, so that the consistency between the simulated environment and the actual operation scene is optimized. The 3D modeling data is imported into the UE5 engine.

[0052] The wire gabion simulation rendering module uses a position-based dynamics (PBD) method to perform physical simulation modeling on the wire gabion, including the entire evolution process of the wire gabion in the filling stage, the lifting stage and the throwing stage.

[0053] The PBD method is a method used in computer graphics to simulate the deformation behavior of objects in real time. It uses a position-based constraint solver to achieve simulation stability and real-time performance by iteratively solving position constraints without directly solving Newton's second law. PBD can handle large time steps without causing numerical instability, which makes PBD particularly suitable for application scenarios that require real-time feedback, such as video games and virtual reality training. In addition, PBD can easily integrate various complex constraint types, including elasticity, plasticity, collision and friction, which makes it adaptable to a variety of different simulation needs.

[0054] The PBD algorithm simulates the deformation effect after force by iteratively adjusting the position of particles. These particles are the discretized points generated by sampling the surface of the geometric model. An object to be physically modeled is represented by N particles and M constraints. The key constraints required are constructed according to the deformation analysis process, including distance constraints, shape matching constraints, bending constraints and collision constraints. The distance constraint ensures that the fixed distance between points in the model remains unchanged, and is suitable for simulating slender, linear or grid-like structures, such as the mesh structure of the wire cage and the linear slender structure of the lifting rope. The shape matching constraint allows the system to iteratively solve the shape matching constraint during the simulation process to achieve the deformation of the object without directly calculating the force acting on the object. It can be used to simulate the overall shape of the wire gabion under the initial force. It remains basically unchanged, ensuring the accuracy and authenticity of the simulation results. Since the filling of stones and the bundling of lifting ropes involve collisions between different objects, the training system of the present invention constructs two modes of continuous collision constraints and discrete collision constraints to handle collisions between different objects. During the simulation, the crane needs to use the lifting rope to lift the wire mesh gabion for throwing. Therefore, in addition to the distance constraint required to simulate the tensile resistance, it is also necessary to construct a bending constraint to simulate the bending.

[0055] During the dam rescue process, the gabion throwing process is divided into three main stages: stone filling, lifting and throwing stages. In order to ensure the interactivity of the training system and the authenticity of the training, the present invention performs a detailed deformation analysis of each stage to ensure the effective use of computing resources. In the stone filling stage, the gabion will undergo reversible elastic deformation due to the squeezing effect of the stones. As the stones are gradually filled, the shape of the gabion will change accordingly according to the stacking of the stones. In the lifting stage, the rope will be stretched and bent during the dragging process. At the same time, the gabion will undergo elastic deformation due to the gravity of the internal stones and the tension of the rope. Finally, in the throwing stage, the gabion and the internal stones will fall as a whole under the action of gravity. At this time, the whole can be treated as a rigid body to simplify the calculation and improve the system response speed.

[0056] like Figure 3As shown in the figure, the specific method of using the PBD method to simulate and render the wire mesh gabion is as follows:

[0057] S031. Discretize stones, lifting ropes and wire gabions into a set of particles. Since the PBD algorithm framework needs to operate on particle points, it is necessary to discretize emergency materials such as stones, lifting ropes and wire gabions into a set of particle points. The discretization scheme for each material is shown in Table 1.

[0058] Table 1 Method for discretizing emergency materials into particles

[0059]

[0060] In the discretization process of the stone model, due to the high rigidity and relatively simple point-surface distribution characteristics of the stone, the direct scattering method is used for particleization. By evenly distributing particles on the polygonal surface of each stone according to the area ratio, the consistency and uniformity of the particle distribution of the entire model are ensured.

[0061] The lifting rope 4 is a long and thin structure, so the particles are evenly placed along the length of the lifting rope, each particle represents a part of the lifting rope 4, and are arranged linearly along the center line of the lifting rope 4. In order to achieve a balance between the simulation accuracy and efficiency of the lifting rope 4, the distance between two particles is set to 15 cm in the present invention.

[0062] Wire mesh gabion is a mesh structure with four particle points placed in the middle of each grid intersection of the wire mesh gabion and one particle point placed between the ends of the two intersections, which represent the connection points of the wires in the metal mesh.

[0063] S032. Construct and apply PBD constraints for stones, lifting ropes 4 and wire gabions. According to the deformation characteristics of stones, lifting ropes and wire gabions, construct PBD constraints, and then apply the constraints to the particle set. The deformation characteristics of the filling stage and the corresponding constraints constructed are shown in Table 2.

[0064] Table 2 Deformation analysis of emergency materials

[0065]

[0066] During the hoisting stage, after the wire gabion is filled with stones, it is affected by its own weight and volume. During hoisting, only some areas will be affected by deformation, while some areas will be slightly affected by deformation. The particles in these areas can be treated as rigid bodies. Therefore, in order to ensure the authenticity and real-time performance of the wire gabion simulation and achieve better simulation effects, the present invention uses a multi-region approach to model the wire gabion during the hoisting stage. The multi-region means that after the wire gabion is tied up with the lifting ropes 4, the two lifting ropes 4 divide the wire gabion from left to right into three areas: left area 1, middle area 2, and right area 3. Figure 4 A multi-zone schematic diagram of the wire mesh gabion under the action of two lifting ropes 4 is shown.

[0067] The left region 1 and the right region 3 will undergo elastic deformation under the action of the lifting rope 4 and their own gravity. The particles in this region are subject to distance constraints, shape matching constraints and collision constraints. The middle region 2 has basically no shape change and is considered rigid. The particles in this region are subject to collision constraints. The multi-regional properties are shown in Table 3.

[0068] S033. Solve the constraint equations to obtain the new position and velocity of the particles that satisfy all constraint conditions. Perform PBD iteration to solve the constructed constraints and modify the predicted position to satisfy all constraint conditions. The constraint Jacobi solver can be used to solve the position-based constraint equations. According to the constraint settlement results, the position and velocity of the particles are updated to achieve interactive simulation of the dynamic behavior of stones, lifting ropes and wire gabions.

[0069] S034. Use the renderer of the UE5 particle system to render. Use the mesh renderer to render the stone, and use the strip renderer to render the lifting rope 4 and the wire gabion.

[0070] Table 3 Multi-region deformation characteristics and constraints during the lifting stage of wire gabion

[0071]

[0072] The operation interaction subsystem includes a wire gabion filling interaction module, a wire gabion hoisting interaction module, a wire gabion throwing interaction module and a position detection and scoring module. The operation interaction subsystem is built based on the UE5 editor.

[0073] The wire gabion filling interactive module is used to train trainees to fill wire gabions with stones. The wire gabion lifting interactive module is used to train trainees to correctly use construction machinery to lift wire gabions and transport them to dangerous locations.

[0074] The wire gabion throwing interactive module is used to train trainees to throw the wire gabion to the correct position.

[0075] The position detection and scoring module is used to detect the construction accuracy and construction time of the trainees in each stage of loading, lifting and throwing, and compare them with the pre-calibrated standard position and standard time, and give corresponding scores. Position detection specifically includes but is not limited to: in the loading stage, detecting the position where the trainees place the lifting rope 4 at the bottom of the wire cage and the position where the stones are placed in the wire cage; in the lifting stage, detecting the walking route and the final parking position of the trainees during lifting; in the throwing stage, detecting the throwing position of each wire cage. The standard position and standard time are calibrated by the system administrator according to actual needs. Visual effects are added to the calibrated standard positions, for example, the standard position is indicated by a flashing arrow, and the trainees can view it by clicking the relevant desktop button; the calibrated standard time is displayed in the form of floating text; the trainees can view the correct operation position by clicking the desktop button. Furthermore, it also includes teaching videos recorded by professional rescue team members with rich rescue experience, or teaching videos made by animation, for trainees to watch and learn.

[0076] S04: The trainees enter the flood prevention and emergency rescue simulation training system to conduct full-process simulation training.

[0077] S041. The flood control plans for the areas under their jurisdiction formulated by flood control management departments at all levels provide the evolution process of floods at various levels of flow in the river channel, including the real-time water conditions when the floods reach various dams and the types of dangerous situations that may be caused, as well as emergency plans for various dangerous situations. Trainees first learn and become familiar with the flood control plans, then select the types of dangerous situations according to the training requirements, combine the real-time water conditions information, select the corresponding emergency rescue machinery and materials, calculate the number of emergency rescue personnel, construction machinery, and wire mesh gabions required, and quickly write emergency dispatch and construction plans for inspection and evaluation by the training instructors.

[0078] S042, entering the operation interaction subsystem to practice the wire gabion filling, lifting and throwing operations.

[0079] First, practice filling the wire mesh cage with stones. The trainee uses a mouse or VR handle to place the empty wire mesh cage in the appropriate position, then successively grabs two lifting ropes 4 and places them on both sides of the lower part of the wire mesh cage, and finally drags the stones to the appropriate position in the wire mesh cage until the filling is completed. The present invention uses PBD to physically model the stones and uses UE5 to render the stones. During the process of placing the stones, pressure and displacement will be generated on the wire mesh cage, and realistic sounds and sensory feedback such as handle vibration will be emitted, so that the trainees can intuitively perceive the impact and correctness of each placement, ensuring that the behavior of the stones in the virtual wire mesh cage is consistent with that in reality.

[0080] Conduct wire gabion hoisting exercises. Trainees use the mouse or VR handle to grab and stretch the lifting ropes 4 on both sides of the lower part of the wire gabion, and tie them to the wire gabion to ensure the stability of the wire gabion when it is hoisted. The lifting rope 4 is rendered by PBD simulation. Trainees only need to drag the lifting rope 4, and the lifting rope 4 can complete its own stretching and other deformation behaviors in real time under the action of force, so that trainees can perceive the texture and changes of the lifting rope 4 in real time. Then, trainees use the mouse or VR handle to control the construction machinery and hoist it to the dangerous part of the dam.

[0081] Conduct wire gabion throwing exercises. Trainees use a mouse or VR handle to adjust the throwing position and angle of the construction machinery and throw the wire gabion into the dangerous location.

[0082] Finally, the trainee clicks the relevant button on the desktop to check the score of this operation.

[0083] Furthermore, before step S041, the method further includes: the trainees have a holistic and macroscopic understanding of all dam projects and traffic routes within the jurisdiction through the Web map module, and can quickly determine the route and destination when receiving a rescue order. Click the name of the relevant dam on the Web map, and the clicked dam will be displayed in three-dimensional simulation.

[0084] At each stage of the operation, trainees can view the correct operation position by clicking the relevant button. Before or at each stage of the operation practice, trainees can click the relevant button to watch the teaching video to learn the operation method.

Claims

1. A flood prevention and rescue training method for the Yellow River professional rescue team, characterized in that: The following steps are involved: S01: Use a rectangular wire gabion as the main rescue equipment, and the ratio of the width to the height of the wire gabion is not less than 1.5; S02: Collect data on the landforms and features within the jurisdiction; systematically collect topographic data of riverbeds, dams and roads within the jurisdiction through drone aerial photography, ground 3D scanning and field measurements, and obtain their geometric parameters and physical properties; accurately count the quantity of various emergency materials and their storage locations; Conduct on-site environmental surveys to collect information on hydrological characteristics and vegetation distribution; S03: Building a flood prevention and rescue simulation training system based on the UE5 engine; the flood prevention and rescue simulation training system includes a hazard setting subsystem, a scenario simulation subsystem and an operation interaction subsystem; The danger setting subsystem includes a water information module, a danger selection module and a rescue plan setting module; wherein the water information module provides water information of various dams at various levels of flow; the danger selection module includes common major dangers of dams for trainees to choose; the rescue plan setting module includes rescue material selection, rescue material usage calculation, rescue scheduling and rapid writing of construction plans; The scenario simulation subsystem includes a three-dimensional terrain simulation module and a wire gabion simulation rendering module; The three-dimensional terrain simulation module includes three-dimensional simulation scenes of dam projects in various locations within the jurisdiction when they are not in danger and when various dangers occur, as well as three-dimensional scenes of various emergency equipment in storage areas; The wire mesh gabion simulation rendering module uses a position-based dynamics method (PBD) to perform physical simulation modeling on the wire mesh gabion; the specific method is as follows: S031. Discretize the stones, lifting ropes and wire gabions into particle sets; the stones are particleized by direct scattering method, and particles are evenly distributed on the polygonal surface of each stone according to the area ratio; the lifting ropes are evenly placed along the length of the particles, and are linearly arranged along the center line of the lifting ropes; the wire gabions are discretized by mesh structure distribution method, and particle points are placed in the middle and end of each grid intersection; S032. Construct PBD constraints based on the deformation characteristics of stones, lifting ropes and wire gabions; Among them, during the stone filling stage, the stone particle set applies collision constraints, the lifting rope applies distance constraints and bending constraints, and the wire gabion applies distance constraints and shape matching constraints; During the hoisting stage, the wire gabion is divided into three areas from left to right: left area, middle area and right area, with the position of the hoisting rope on the wire gabion as the boundary. The left and right areas undergo elastic deformation, and their particles are subject to distance constraints, shape matching constraints and collision constraints; the middle area undergoes only slight deformation and is regarded as a rigid body, and its particles are subject to collision constraints; S033. Solve the constraint equations to obtain a new position and velocity of the particle that satisfies all constraint conditions; S034. Use the renderer of the UE5 particle system for rendering; use the mesh renderer to render the stones, and use the strip renderer to render the lifting ropes and wire gabions; The operation interaction subsystem includes a wire gabion filling interaction module, a wire gabion hoisting interaction module, a wire gabion throwing interaction module and a position detection and scoring module; wherein, The wire gabion filling interactive module is used to train trainees to fill wire gabions with stones; the wire gabion hoisting interactive module is used to train trainees to use construction machinery to lift wire gabions and transport them to dangerous locations; the wire gabion throwing interactive module is used to train trainees to throw wire gabions to the correct location; the position detection and scoring module is used to detect the construction accuracy and construction time of trainees at each stage of filling, hoisting and throwing, and compare them with the pre-calibrated standard position and standard time, and give corresponding scores; S04: The trainees enter the flood prevention and emergency rescue simulation training system and conduct full-process simulation training; S041, trainees first learn and familiarize themselves with flood prevention plans, then select the type of dangerous situation according to the training requirements, combine water information, select the corresponding emergency rescue machinery and materials, calculate the number of emergency rescue personnel, construction machinery, and wire mesh gabions required, and quickly write emergency rescue dispatch and construction plans; S042, enter the operation interaction subsystem to practice the gabion filling, lifting and throwing operations; use the mouse or VR handle to place the empty gabion in the appropriate position, then grab two lifting ropes and place them on both sides of the lower part of the gabion, and finally drag the stones to the appropriate position in the gabion until the filling is completed; use the mouse or VR handle to grab and stretch the lifting ropes on both sides of the lower part of the gabion, tie them to the gabion, and then use the mouse or VR handle to control the construction machinery and lift it to the dangerous part of the dam; adjust the throwing position and throwing angle of the construction machinery to throw the gabion into the dangerous part.

2. A flood prevention and rescue training method for the Yellow River professional rescue team according to claim 1, characterized in that: The danger setting subsystem also includes a Web map module, and various dams, emergency material storage places, and traffic roads within the jurisdiction are marked on the Web map.

3. A flood prevention and rescue training method for the Yellow River professional rescue team according to claim 2, characterized in that: Before step S041, the method also includes: the trainees view the dam projects and traffic routes within the jurisdiction through the Web map module.

4. The method for flood prevention and rescue training of the Yellow River professional rescue team according to claim 1, characterized in that: The operation interaction subsystem is constructed based on the UE5 editor.

5. The method for flood prevention and rescue training of the Yellow River professional rescue team according to claim 1, characterized in that: The positions detected by the position detection and scoring module specifically include: in the loading stage, detecting the position where the trainees place the lifting rope at the bottom of the wire cage and the position where the stones are placed in the wire cage; in the lifting stage, detecting the walking route and the final parking position of the trainees during lifting; in the casting stage, detecting the casting position of each wire cage.

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