A method for constructing a large-scale breeding equipment platform based on digital twins

Abstract

The present invention discloses a method for constructing a large-scale aquaculture equipment platform based on digital twins, belonging to the technical field of marine aquaculture equipment construction. The method comprises the following steps: S1: obtaining the size and quantity of parts, modeling the parts, and assembling the parts into equipment; S2: saving and importing the equipment into a model library; S3: classifying the equipment in the model library to obtain aquaculture platforms, aquaculture vessels, and intelligent cages; S4: performing parameterized and modular packaging on the equipment; S5: virtually assembling and virtually laying out the equipment in the model library; and S6: exporting a production bill of materials. The method for constructing a large-scale aquaculture equipment platform based on digital twins addresses three issues in the custom design and mass production of marine aquaculture equipment: cost control, technical support, and improving the industrial chain.

Description

Technical Field

[0001] The present invention relates to the technical field of marine aquaculture equipment construction, and in particular to a method for constructing a large-scale aquaculture equipment platform based on digital twins. Background Art

[0002] Marine ranching refers to the use of modern marine engineering technology and natural productivity to deploy aquaculture equipment in specific waters for scientific cultivation and management, creating artificial fisheries. It is a modern approach to sustainable marine resource utilization that can increase fishery resources and improve seafood quality. Currently, various aquaculture equipment for marine ranching has been successfully deployed, generating positive economic returns for the aquaculture market. Common equipment includes deep-sea automatic rotating marine fish aquaculture platforms, fully submersible suspended fixed-depth, high-rip-stop aquaculture platforms, suspended dynamically positioned aquaculture platforms, and semi-submersible rectangular column-based hidden aquaculture platforms. As the popularity of marine ranching continues to grow, the manufacturing industry for large-scale marine aquaculture equipment urgently needs a viable and effective solution. On the one hand, it is necessary to shorten the R&D and design cycle for large, complex, multi-functional, and complex equipment, while meeting market needs and enabling rapid production, assembly, and deployment. On the other hand, the highly complex and dynamic marine environment requires the diversification, personalization, and customization of some of the equipment on general-purpose large-scale platforms to adapt to specific deployment environments and ensure stability, safety, profitability, and sustainability. Secondly, compared with assembly and deployment on land, the integration, debugging, optimization and adjustment of large platforms in the marine environment are more costly and difficult. Modern methods are needed to verify and determine the structural rationality, functional integrity, system coordination, environmental adaptability and economic sustainability of the designed marine ranch plan.

[0003] Currently, there are still many problems to be solved in the research and development of large-scale equipment, equipment customization, and equipment mass production:

[0004] (1) Equipment R&D and design cycles are long, customization is insufficient, and it is difficult to quickly respond to market demand. Existing solutions lack effective modularization and parameterization strategies during the design phase, resulting in a cumbersome and lengthy equipment design process. Faced with rapidly changing market demands, existing technologies are unable to quickly modify and optimize equipment designs. Customization capabilities are severely insufficient to meet specific deployment environments and aquaculture needs, slowing the implementation of marine ranching solutions.

[0005] (2) The cost of equipment integration and assembly is high, and the testing and verification of equipment coordination and environmental adaptability are poor. Due to the complex structure and redundant systems of large-scale marine aquaculture equipment, the cost of integration, assembly and subsequent optimization in the marine environment is much higher than in the terrestrial environment. At present, the existing technical testing methods are immature, and verification tests are carried out by equipment production and integrated assembly. As a result, it is impossible to fully verify the coordination and environmental adaptability of the equipment during the deployment phase, resulting in an extended debugging cycle and a significant increase in the cost of subsequent optimization and adjustment.

[0006] (3) Mass production of equipment is difficult and the production model is imperfect. The lack of standardized and semi-standardized production concepts in the mass production of equipment components leads to a lack of scientific planning for equipment production plans and inefficient bill of materials (BOM) generation. This situation results in significant material waste and chaotic resource allocation during the production process, making it difficult to effectively implement production plans. This leads to low production efficiency, high costs, and a negative impact on economic benefits.

[0007] Existing methods lack scientific planning and modern technical support for the rapid design, customization, solution verification, and mass production of large-scale equipment platforms based on marine ranches. Existing methods make it difficult to comprehensively evaluate the densely structured nature of large-scale equipment and analyze the rationality and efficiency of the coordination between the structure and function of aquaculture equipment, thereby designing an overall solution with precise selection and appropriate layout density. Secondly, the integration of multiple types of equipment is difficult, the degree of integration is low, and the overall benefits are not significant. Communication between different companies across regions during the equipment development process is difficult, and the design difficulty and development cycle increase, resulting in irrational and mismatched equipment when integrating the platform. At the same time, the integration difficulty and debugging cycle are prolonged, which directly affects the project benefits of marine ranching. In addition, based on the global optimization goal of achieving economic maximization, how the relevant manufacturing industry can carry out mass-order production of equipment parts requires a standardized production model method to reduce excess material waste and accelerate the implementation of production plans. Summary of the Invention

[0008] In order to overcome the defects of the existing technology, the present invention provides a method for constructing a large-scale breeding equipment platform based on digital twins to solve the above problems.

[0009] The technical solution adopted by the present invention to solve the technical problem is: a method for constructing a large-scale breeding equipment platform based on digital twins, comprising the following steps:

[0010] S1: Obtain the size and quantity of parts, model the parts, and assemble the parts into equipment;

[0011] S2: Save and import the equipment into the model library;

[0012] S3: Classify the equipment in the model library to obtain aquaculture platforms, aquaculture vessels and intelligent cages;

[0013] S4: Parametric packaging and modular packaging of equipment;

[0014] S5: Virtually assemble and layout the equipment in the model library;

[0015] S6: Export the production material list.

[0016] Preferably, in step S4, the step of parameterizing and packaging the equipment includes:

[0017] S41: Parts are classified into structural parts and non-structural parts according to the functions of the equipment and the properties of the parts in the equipment;

[0018] According to the function of the equipment and the properties of the parts in the equipment, the size of the parts is divided into flexible size and rigid size;

[0019] S42: Determine the base size of the equipment;

[0020] S43: Based on the relationship between the flexible size of the part and the equipment reference size, construct the flexible size parameter expression of the part.

[0021] Optionally, the step of performing parameterized packaging on the equipment further includes: S44: constructing a quantity expression of the structural parts according to the relationship between the number of structural parts and the change in equipment size.

[0022] Specifically, the step of performing parameterized packaging on the equipment further includes: S45: constructing a flexible size coordinate expression of the part according to the relationship between the flexible size of the part and the three-dimensional coordinate center of the equipment.

[0023] It is worth noting that, in step S4, the steps of modularizing the equipment include:

[0024] S46: Determine the scale of the modeled equipment and the coordinate center position of the modeled equipment;

[0025] S47: Determine the expansion mode of the model based on the coordinate center of the modeled equipment;

[0026] S48: Setting basic expansion parameters of the modeled equipment, wherein the basic expansion parameters include step length and expansion quantity.

[0027] Preferably, the step of virtually assembling equipment in step S5 includes:

[0028] S51: By assembling the equipment in the model library instead of the actual components, the matching, installation accuracy and spatial distribution of the equipment in the model library are virtually verified.

[0029] Optionally, after virtually assembling the equipment, evaluate the equipment in the model library by:

[0030] Evaluate the integrity of the equipment in the model library; wherein, determine whether the number of parts of the equipment is complete, and if not, execute step S1 to re-acquire parts for the equipment;

[0031] Evaluate the assembly accuracy of the equipment in the model library; perform virtual assembly on the modeled parts to verify whether the assembly is reasonable. If misalignment or penetration occurs, re-execute step S11 to reassemble the parts; measure the gap between the parts assembly to determine whether the assembly error is within the threshold. For assemblies where the assembly error exceeds the threshold, re-execute step S1 to reassemble the parts.

[0032] Specifically, the step of performing virtual layout of equipment in step S5 includes:

[0033] S52: Build an ocean geography model;

[0034] S53: Retrieve modularized and packaged equipment from the model library and arrange it in the ocean geographic model.

[0035] The beneficial effects of the present invention are as follows: in the large-scale aquaculture equipment platform construction method based on digital twins, through the modularization, parameterization and standardization of equipment design, and with the help of a digital design platform, rapid customized design and production manufacturing coordination of equipment are realized, and modular component design ideas are adopted for highly general mechanical parts, standardized production is implemented, and economies of scale and cost reduction are achieved; for certain parts with high customization requirements, semi-standardized design and production are used, that is, on the basis of basic standard modules, combined with specific customization requirements, a small amount of secondary processing and configuration are carried out through parametric changes, thereby solving the three problems of cost control, technical support and improvement of the industrial chain in the customized design and mass production process of marine aquaculture equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a flowchart of a method for constructing a large-scale aquaculture equipment platform based on digital twins in one embodiment of the present invention;

[0037] Figure 2 Schematic diagram of a digital twin platform model library in one embodiment of the present invention;

[0038] Figure 3 A schematic diagram of equipment parameterization in one embodiment of the present invention;

[0039] Figure 4 A schematic diagram of modular equipment in one embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the assembly method of the aquaculture platform "Hengyi No. 1";

[0041] Figure 6 A virtual layout diagram of a marine ranch in one embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of a large-scale breeding equipment customization platform based on digital twins in one embodiment of the present invention. DETAILED DESCRIPTION

[0043] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0044] like Figure 1-7 As shown, a method for constructing a large-scale breeding equipment platform based on digital twins includes the following steps:

[0045] S1: Obtain the size and quantity of parts, model the parts, and assemble the parts into equipment;

[0046] S2: Save and import the equipment into the model library;

[0047] S3: Classify the equipment in the model library to obtain aquaculture platforms, aquaculture vessels, and intelligent cages. The classification management function is the foundation of the model library. By clarifying the classification standards, the equipment can be systematically classified to ensure that all types of equipment can be managed and used in a standardized manner. The classification of each type of aquaculture equipment is mainly based on factors such as spatial structure, functional use, and usage environment. Aquaculture platforms are further classified according to their functions such as self-elevating, semi-submersible, floating, and mobile. Aquaculture vessels are further classified according to their functionality or range of activity. Intelligent cages are further classified according to their functions such as semi-submersible, bottom-sitting, fully submersible, and fixed pipe piles.

[0048] S4: Parametric packaging and modular packaging of equipment;

[0049] S5: Virtually assemble and layout the equipment in the model library;

[0050] S6: Export the production bill of materials; adopt standardized and semi-standardized thinking in the R&D process to achieve efficient collaboration between design, manufacturing and supply chain, and quickly export the required bill of materials (BOM) through the digital platform to ensure the consistency of information flow and material flow from the design end to the production end and an efficient production model, further promoting the rapid mass production of equipment.

[0051] In the method for constructing a large-scale aquaculture equipment platform based on digital twins, the modularization, parameterization and standardization of equipment design are used, and with the help of a digital design platform, rapid customized design and production manufacturing collaboration of equipment are achieved. A modular component design concept is adopted for highly general mechanical parts, and standardized production is implemented to achieve economies of scale and reduce costs. For certain parts with high customization requirements, semi-standardized design and production are used, that is, based on basic standard modules, combined with specific customization requirements, a small amount of secondary processing and configuration are performed through parametric changes, thereby solving the three problems of cost control, technical support and improving the industrial chain in the customized design and mass production of marine aquaculture equipment.

[0052] like Figure 2 As shown, building a model library also relies on 3D modeling, parametric packaging, and modular packaging technologies. 3D modeling refers to the use of computers to create object models in a virtual 3D space. During the model library construction process, by obtaining the dimensions, number of parts, and assembly relationships of common aquaculture equipment parts, and using third-party software for 3D modeling and assembly, mechanical parts can be combined into a virtual standard object. Each virtual standard object represents a piece of common aquaculture equipment, and these objects, categorized by function and structure, form the foundation of the model library.

[0053] However, the basic model library does not allow for customized equipment. Therefore, equipment needs to be parametrically and modularly packaged to enable rapid transformation and reuse based on demand, allowing engineers to quickly, efficiently, and accurately customize equipment. Parametric design means that the model's dimensions, geometric relationships, and adaptive properties can be controlled and adjusted through parameters. During the design process, parametric models can dynamically adjust dimensions and structures based on project requirements. For example, when the capacity of a buoyancy tank is adjusted or the mesh density of aquaculture cages changes, these adjustments are fully reflected in the overall equipment through the packaged relationships, and other structures will deform accordingly without requiring designers to reconstruct the entire model. Modular design allows equipment to be broken down into independently operable modules, allowing for independent design, testing, and optimization before integration into the overall system. Modular design not only allows for faster prototyping and troubleshooting, but also makes the overall design more flexible and maintainable.

[0054] At the same time, digital equipment models involve information at multiple levels, such as model size, dimensional relationships, color, material, and physical properties. This information is integrated into independent and complete digital models through packaging technology, forming information islands. Packaged models carry complete performance and attribute information, and no performance indicators or related attribute information are lost when running independently in a virtual environment. The packaged models not only provide a reliable data foundation for overall design but also ensure the consistency and integrity of information between models. Model libraries created based on packaged models enable rapid modification and reuse of component equipment while ensuring that inherent information and various relationships are not affected.

[0055] The establishment of a model library can significantly improve design efficiency, allowing designers to quickly access models with clearly defined functional structures and easily generate different configurations during the design process. Using digital twin technology for virtual verification and optimization can significantly save time and resource costs, while also significantly improving design accuracy and reliability. The equipment model library provides the ability to define classifications and rapidly design, significantly reducing R&D complexity and cycle time, increasing product iteration speed, and promoting the transition of marine ranching from traditional aquaculture methods to modern, intelligent models.

[0056] It is worth noting that the following takes the pile-type movable breeding platform as an example. Figure 3 As shown, in step S4, the step of parameterizing and packaging the equipment includes:

[0057] S41: Based on the function of the equipment and the properties of the parts within it, parts are classified as structural and non-structural. Structural parts are those that bear the primary loads of the structure and play a key role in the overall stability and strength of the structure, and are generally made of high-strength materials, such as beams, columns, and steel plates. Non-structural parts are components that do not directly bear the primary loads of the structure and serve other functions within the equipment, such as aisles and fishing nets. An important way to distinguish whether a part is structural or non-structural is to determine whether the loss or damage of the part will cause the equipment structure to fail. If so, it is a structural part; if not, it is a non-structural part.

[0058] Based on the function of the equipment and the properties of the parts within it, the dimensions of the parts are divided into flexible dimensions and rigid dimensions. Parts whose dimensions need to adapt to changes in the environment are flexible dimensions. Conversely, parts whose dimensions do not need to adapt to changes in the environment are rigid dimensions. For example, the fishing net of aquaculture equipment needs to change with the aquaculture area. The length and width of the fishing net are flexible dimensions, while the thickness, i.e., the rope diameter, is a rigid dimension. When the equipment size changes, the length of the aisle changes accordingly. Therefore, the length of the aisle is a flexible dimension. However, the width and thickness of the aisle do not need to change because the aisle needs to meet the needs of people passing through. Therefore, the width and thickness of the aisle are rigid dimensions.

[0059] S42: Determine the basic size of the equipment, generally importing it into the platform based on the length, width and height of the equipment;

[0060] S43: Based on the relationship between the flexible size of the part and the equipment reference size, construct the flexible size parameter expression of the part.

[0061] S44: Based on the relationship between the number of structural parts and the change in equipment size, construct a quantitative expression for the structural parts. Structural parts need to bear the main loads. When the overall size of the equipment changes, the main loads of each structural part will change accordingly. When the main load increases, in order to ensure the stability and firmness of the equipment structure, it is necessary to increase the size of the structural parts or the number of structural parts according to the calculation design. For example, in a pile-type movable breeding platform, the vertical load is mainly borne by four positioning shafts and eighteen vertical short trusses. Six short trusses are evenly distributed on one side of the long corridor. According to the preliminary design, the length of the long corridor and the short trusses can be used to construct a quantitative expression for rapid design. Subsequent optimization can be based on this to perform load strength calculations and load distribution calculations for appropriate adjustments;

[0062] S45: Construct a coordinate expression for the flexible size of the part (such as the corresponding displacement or rotation of x, y, and z) based on the relationship between the flexible size of the part and the three-dimensional coordinate center of the equipment.

[0063] Parametric packaging and modular packaging are designed to support the rapid customization and design of large-scale breeding equipment with changing sizes and increasing quantities, and to build a general model library for equipment with high reusability and flexibility. The equipment needs to be modularized and parametrically packaged. First, the basic size data of general breeding equipment must be obtained, and three-dimensional modeling must be performed using third-party software. The mechanical components and structural models must be abstracted into standard objects through geometric modeling technology. Using parametric design technology, parametric expressions of geometric features are defined through steps S41 to S45 to achieve flexible adjustment of component size, shape, and material to meet different customization requirements, and can be flexibly adjusted according to design requirements. Through parametric and modular processing, the equipment in the model library can be quickly reused and built and assembled on the platform.

[0064] Explain the parameterized package:

[0065] Set parameterization completion indicators, which include parameterization comprehensiveness indicators and parameterization accuracy indicators. The parameterization comprehensiveness indicators are as follows: 1. Whether the parameterization covers all key factors affecting the model structure and function; 2. Whether the main variables and boundary conditions of the equipment are parameterized; the parameterization accuracy indicators are as follows: 1. Whether the parameterized function can accurately reflect the changes in equipment size; 2. Through virtual simulation, test whether the part sizes under different equipment sizes can be reasonably matched, which includes verifying the assembly status and measuring the assembly error.

[0066] Proportional import and benchmark setting: Subsequently, the model is imported into the platform at a 1:1 ratio, and the coordinate axis of the lower right positioning axis is used as the benchmark. When the overall size of the equipment (length, width and height) changes, it is expanded and contracted in the negative direction of the x-axis, the negative direction of the y-axis, and the negative direction of the z-axis, and the quantity changes. According to the functions and roles of the parts, they are divided into structural parts and non-structural parts, and their dimensions are defined as flexible dimensions or rigid dimensions. For example, the enclosing truss of aquaculture equipment, as a key structural component, needs to withstand loads including its own weight, aquaculture equipment, the weight of aquatic animals, waves, water, and wind, so it can be identified as a structural part. When the overall size of the equipment changes, the number of enclosing trusses needs to be changed accordingly to meet the load-bearing requirements. At the same time, the truss radius is defined as a rigid dimension, the length is defined as a flexible dimension, and the size, quantity, and coordinate change relationship of the part with the benchmark dimension are calculated.

[0067] Take the length, width and height of the platform breeding area as an example of size changes:

[0068] The parameter design of the parts is changed according to the length value of the platform breeding area (in this embodiment, the length direction is set as the X axis in the coordinate system):

[0069] 1. The front transverse trusses, back transverse trusses, front fishing nets, back fishing nets, and bottom fishing nets are proportionally expanded and contracted according to the length of the platform aquaculture area. The left positioning axis, left trusses, left fishing nets, middle aisle, middle fishing nets, and eight fixed diagonal trusses are displaced accordingly according to the length of the platform aquaculture area. The corresponding local coordinates are set and the following are obtained:

[0070] The length of the front and back transverse trusses is L t =length*0.5, where L t is the length of the horizontal truss on the front or the length of the horizontal truss on the back; during scaling, the object will stretch L along the positive and negative directions of the x-axis t , so L t Half of the actual length;

[0071] The lengths L of the front, back, and bottom fishing nets f =length*i, where L f is the length of the front fishing net, the length of the back fishing net, or the length of the bottom fishing net, and i is half the ratio of the length of the fishing net to the length of the platform aquaculture area;

[0072] Coordinate ΔL of the left positioning axis in the longitudinal direction a , the lengthwise coordinate ΔL of the left fishing net f , the lengthwise coordinate ΔL of the left aislep , the lengthwise coordinate ΔL of the left truss t , the lengthwise coordinate ΔL of the left fixed diagonal truss ti and the lengthwise coordinate ΔL of the left bottom truss tm =ΔL a =ΔL f =ΔL p =ΔL t =ΔL ti =ΔL tm =-length+a, where a is the initial coordinate adjustment parameter;

[0073] The lengthwise coordinate ΔL of the middle aisle p , the longitudinal coordinate ΔL of the middle fishing net f , the lengthwise coordinate of the middle vertical short truss ΔL tms , the lengthwise coordinates of the four middle oblique trusses ΔL ti , the lengthwise coordinate of the middle bottom truss ΔL tm =ΔL p =ΔL f =ΔL tms =ΔL ti =ΔL tm =-length*0.5+a, where a is the initial coordinate adjustment parameter;

[0074] 2. For the setting interval of the front vertical short truss or the back vertical short truss in step 1, expand the corresponding number n according to the length value of the platform breeding area, and obtain the quantity expression:

[0075] 3. Both the front aisle and the back aisle can be divided into three parts: two long aisles and a connecting aisle (i.e., the middle aisle). The two long aisles are proportionally expanded and contracted according to the length change of the platform breeding area. The left long aisle and the connecting aisle of the two long aisles are displaced accordingly according to the length change of the platform breeding area (because the coordinates of the lower right positioning axis are used as the reference, the left long aisle and the connecting aisle need to be displaced after the length of the platform breeding area changes). The parameter expression and the coordinate expression in the length direction are obtained:

[0076] The parameter expressions of the lengths L1 and L2 of the two long corridors are: L1 = L2 = (length - 4) * 22.175 / (92.7 - 4); in this embodiment, the length of the platform breeding area is 22.175, the length of the long corridor is 92.7, and the length of the connecting corridor is 2;

[0077] The lengthwise coordinate ΔL of the left long aisle in the two long aisles land the longitudinal coordinate ΔL of the connecting aisle m The coordinate expression is: ΔL l =ΔL m =-(length-2)*0.5+a; In this embodiment, the length of the connecting aisle is 2, and a is the initial coordinate adjustment parameter. During scaling, the object will stretch in both the positive and negative directions of the corresponding axis. Therefore, the value in the parameter expression is half of the actual length. It is therefore expressed by multiplying by 0.5, that is, actual displacement = (length-length of the connecting aisle) / 2.

[0078] The parameter design of the parts is changed according to the width value of the platform breeding area (in this embodiment, the width direction is set as the Y axis in the coordinate system):

[0079] 1. The side transverse trusses, side fishing nets, side aisles, middle trusses, middle fishing nets, middle aisles and bottom fishing nets are scaled proportionally according to the width of the platform breeding area, resulting in:

[0080] The width of the side truss or the middle truss W t and the width W of the side or middle fishing net f The parameter expression is: W t =W f =width*0.5+s, where s is the initial size adjustment parameter. During scaling, the object will stretch along both the positive and negative directions of the corresponding axis. Therefore, the value in the parameter expression is half of the actual length, so it is expressed by multiplying by 0.5.

[0081] The width of the side aisle W p and the width of the aisle in the middle, W m The parameter expression is: W p =W m =(width-2*0.2)*i, when calculating W p When i = (the width of the original side aisle / the width of the original platform breeding area) * 0.5, when calculating W m Then i = (original middle aisle width / original platform breeding area width) * 0.5. Since the platform breeding area width is composed of three parts: "aisle width", "front aisle width" and "rear aisle width", where the values of "front aisle width" and "rear aisle width" are both 0.2, the width of the front and rear aisles needs to be subtracted when calculating the side corridor length, that is, 2 * 0.2;

[0082] The width W of the bottom fishing net f The parameter expression is: W f=width*i, i=(width of the original bottom fishing net / width of the original platform aquaculture area)*0.5. During scaling, the object will stretch in both the positive and negative directions of the corresponding axis. Therefore, the value in the parameter expression is half of the actual length, so it is expressed by multiplying by 0.5.

[0083] 2. Set the interval of the short vertical trusses on the side in step 2. Expand the corresponding number according to the width relationship and eliminate rounding errors to obtain the quantity expression: Where width%step2 is the remainder of width over step2;

[0084] 3. The rear positioning axis, rear fishing net, rear aisle, rear truss, and four fixed diagonal trusses are displaced according to the width of the platform breeding area. The corresponding local coordinates are set and the coordinate expression in the width direction is obtained:

[0085] Coordinate W of the width direction of the positioning axis on the back side a0 , the width coordinate W of the fishing net on the back f0 , the width coordinate W of the aisle at the back p0 , the width coordinate W of the back truss t0 , the width coordinate W of the fixed diagonal truss ti0 The coordinate expression is: W a0 =W f0 =W p0 =W t0 =W ti0 =width+a, where a is the initial coordinate adjustment parameter;

[0086] The parameter design of the parts is changed according to the height value of the platform breeding area (in this embodiment, the height direction is set to the Z axis in the coordinate system):

[0087] 1. The vertical short truss and positioning axis are expanded and contracted in proportion, resulting in:

[0088] The height of the vertical short truss H t The parameter expression is H t =height*0.5+s, where s is the initial size adjustment parameter. During scaling, the object will stretch along both the positive and negative directions of the corresponding axis. Therefore, the value in the parameter expression is half of the actual length, so it is expressed by multiplying by 0.5.

[0089] Height value H of positioning axis d Parameter expression: H d=height*i, i=(height of the original positioning axis / height of the original platform breeding area)*0.5. During scaling, the object will stretch in both the positive and negative directions of the corresponding axis. Therefore, the value in the parameter expression is half of the actual length, so it is expressed by multiplying by 0.5.

[0090] 2. The lowest truss and the lowest fishing net are displaced proportionally, and we get:

[0091] The height coordinate ΔH of the bottom truss t and the height coordinate ΔH of the bottom fishing net f The coordinate expression is ΔH t =ΔH f =-height+a, where a is the initial coordinate adjustment parameter;

[0092] 3. Set the interval of the bottom truss in step 3. Expand the corresponding quantity according to the height relationship and eliminate the rounding error to get the quantity expression as follows: Where height%step3 is the remainder of height over step3.

[0093] Completion evaluation and optimization:

[0094] For equipment with completed parametric packages, perform parametric variations and evaluate the corresponding parametric completion indicators. Components that fail the evaluation are optimized as follows, and the evaluation and optimization are repeated until the equipment meets the standards and is updated to the model library: 1. Add missing parametric packages for the affected components; 2. Adjust component parametric functions; 3. Redefine the part extension attributes.

[0095] It is worth noting that if Figure 4 As shown, in step S4, the step of modularizing the equipment includes:

[0096] S46: Determine the scale of the modeled equipment and the coordinate center position of the modeled equipment;

[0097] S47: Determine the expansion mode of the model based on the coordinate center of the modeled equipment;

[0098] S48: Setting basic expansion parameters of the modeled equipment, wherein the basic expansion parameters include step length and expansion quantity.

[0099] Explanation of modular packaging:

[0100] Set modular completion indicators, which include modular independence indicators, modular reusability indicators and modular extensibility indicators; modular independence indicators are specifically: 1. Through functional division, confirm that each equipment can complete specific tasks independently without interfering with each other; 2. Through parameter or quantity changes, determine that each equipment can change size and expand rapidly without interfering with each other; modular reusability indicators are specifically: 1. Verify whether the equipment can be quickly called in different scenarios and used flexibly in the system environment; 2. Whether the equipment retains key interfaces and can be quickly connected according to different needs to ensure the flexibility of reuse; modular extensibility indicators are specifically: whether the equipment can be quickly expanded according to needs.

[0101] Proportional import and axis setting: Based on the completed parametric model, a 1:1 scale model is imported to form a pile-type movable breeding platform, and the center of gravity of the breeding area is set as the axis.

[0102] Linear expansion in the x-axis direction: Select a model, linearly expand the model in the x-axis direction, and set the adjustable step size and expansion quantity.

[0103] Linear expansion in the y-axis direction: Based on the above, linear expansion is performed in the y-axis direction of the model, and adjustable step size and quantity are set to achieve comprehensive expansion.

[0104] Completion Assessment and Optimization: Modularization of completed equipment is performed and evaluated against modular completion indicators. Equipment that fails the assessment will be optimized as follows, and the assessment and optimization will be repeated until the equipment meets the standards and is updated to the model library: 1. Adjust equipment modularization parameters; 2. Redefine equipment expansion attributes.

[0105] Preferably, the step of virtually assembling equipment in step S5 includes:

[0106] S51: By assembling the equipment in the model library instead of the actual components, the matching, installation accuracy and spatial distribution of the equipment in the model library can be virtually verified, and the assembly method and assembly plan of the parts can be verified through semi-simulation. Large-scale marine aquaculture platforms involve complex assembly problems. Figure 5 The rectangular movable column implicit breeding platform "Hengyi No. 1" shown in the figure is used as an example for analysis. Figure 6As shown, after analysis, the main structural frame of the platform, such as the assembly and reinforcement between the main frames, and the assembly of the main frame structure and support beams, requires welding connections; the assembly of the main frame and auxiliary structures, key parts such as aquaculture cages, buoyancy boxes, etc. requires bolt connections; the connection of the thin floor of the aisle, the outer fence of the cage, the quick connection and fastening of the safety protection equipment pipes and thinner metal plates require riveting; the fixing and sealing of the cables involve adhesive connections; in addition, a large number of key connections are involved in the connection of the shaft and hub of the rotating machinery. The assembly process of the entire platform is complicated and tedious, involving multiple assembly methods and multiple assembly points. Therefore, it is very necessary to replace the actual components for assembly through semi-simulation based on three-dimensional models, virtually verify the component matching, installation accuracy and scientific spatial distribution of the overall equipment, and generate a set of mature platform assembly solutions;

[0107] For equipment that is a moving part, the motion properties, signal logic, and motion logic are configured during the parameterized packaging of the equipment, and the equipment quantity and position are assembled using a virtual layout method. Motion and signal packaging is independent of parameter packaging. The packaging process is as follows: setting motion properties, adding drivers, creating signals, binding driver signals, and setting motion logic.

[0108] After step S51, the size of the parameterized packaged equipment is adjusted;

[0109] The breeding platform also involves the assembly of some moving parts. In order to effectively get rid of the time-consuming and high-cost difficulties of production and manufacturing, assembly, signal control, system configuration and experimental verification in the traditional equipment solution verification, it is proposed to configure the motion properties, signal logic and motion logic for the working parts during the packaging processing, simulate the synchronous connection of data and signals through the signal interface of the connecting components, and use physical motion simulation to simulate the dynamic behavior of the components under working conditions. This virtual assembly and simulation method is used to quickly perform logic verification and control testing of the equipment to ensure efficient communication between components and the integrity of motion signal transmission, as well as the stability and rationality of operations in the workshop.

[0110] For example, crane components are required to complete feeding operations within a specific area, picking up feed from offshore feed ships or feed warehouses and moving it to the feeding area for feeding animals. Therefore, a customized design using the platform ensures that the layout can cover the entire breeding area without wasting resources or causing bottlenecks due to too many or too few cranes.

[0111] Work Area Analysis: Retrieve the aquaculture equipment platform from the model library, define the boundaries of the aquaculture area, and use measurement tools to determine the size range. Based on the geometric boundary determination, conduct a coverage assessment, marking the precise coordinates of the feeding and retrieving points and the feeding coverage range. Construct virtual 3D space data to clarify the dynamic range of crane operation, including maximum and minimum extension radius, rotation angle, vertical and horizontal operating limits, and other data.

[0112] Selection based on the scope of work: Crane selection requires comparing technical specifications and optimizing parameters. First, select crane models from a library that have the appropriate operational capabilities and technical parameters for the defined scope of work. Next, consider the candidate crane models' technical specifications, including rated load capacity, hoisting speed, mechanical strength, crane weight, and structural dimensions.

[0113] Select quantity based on space: Using the platform to build a virtual scene, determine the feed boat / warehouse location and work platform layout, ensuring an unobstructed operating path and maximum space utilization after the cranes are deployed. Based on the work area configuration and feeding point distribution, various layout methods, such as matrix arrangement and symmetrical distribution, are used to optimize the layout. Furthermore, the feed weight per crane feed (i.e., the operating load) is calculated to minimize the number of cranes required to ensure that the feeding task can be completed within a specified timeframe without overloading.

[0114] Model library component verification: Crane components are arranged in a virtual environment, and real-time dynamic virtual simulation is performed to ensure the accuracy of the model's working range. The first step is to verify the layout's rationality. Because the crane must bear a large weight, it must be placed in a structurally stable location. Furthermore, the crane must carry fish feed, perform horizontal rotations, and lift and lower feed, ensuring ample working space and clear obstructions along its trajectory. Otherwise, the crane's installation position must be adjusted, or measures such as removing obstacles or restricting the crane's working path must be taken. Second, operational rationality is verified through simulation to verify that the crane's working range meets the requirements. If the crane does not meet the requirements, a new crane model is selected. Crane trajectory planning can also be performed, typically using the shortest path method or the segmented straight line method. The shortest path method uses the fish feed collection point as the starting point and the feeding point as the end point, with the straight-line distance between the two points representing the crane's working path. The segmented straight line method uses the same starting and ending points as described above, performing horizontal and vertical translation between the two points. Furthermore, horizontal rotation can be added to adjust the crane's horizontal angle of release. Both methods use virtual verification to select efficient routes that minimize time, maximize safety, and minimize distance. This verification process allows for effective adjustments to component positions and configurations, enabling a continuous, iterative optimization process based on a "design, simulation, optimization, redesign" strategy.

[0115] Optionally, after virtually assembling the equipment, evaluate the equipment in the model library by:

[0116] Evaluate the integrity of the equipment in the model library; determine whether the number of parts of the equipment is complete, and if not, execute step S1 to re-acquire parts for the equipment to supplement the corresponding parts; determine whether the virtual geometry and topology of the parts of the equipment are consistent with the actual parts, and if not, adjust the size and geometry of the parts of the equipment in the model library according to the actual parts;

[0117] Evaluate the assembly accuracy of the equipment in the model library; perform virtual assembly on the modeled parts to verify whether the assembly is reasonable. If misalignment or penetration occurs, it means that the assembly is incorrect, and re-execute step S11 to reassemble the parts; measure the gap between the parts assembly to determine whether the assembly error is within the threshold. For assemblies where the assembly error exceeds the threshold, re-execute step S1 to reassemble the parts.

[0118] It is worth noting that the step of performing virtual layout of equipment in step S5 includes:

[0119] S52: Build an approximate three-dimensional model of ocean geography;

[0120] S53: Retrieve modularized and packaged equipment from the model library and arrange them in the approximate three-dimensional oceanographic model;

[0121] The overall layout of equipment requires planning and design based on marine geographic information. First, an approximate three-dimensional model of the ocean's geography, including elements such as coastline shape, island shape, and sea depth, is constructed to simulate the complex geography of the ocean. While meeting the geographic characteristics and aquaculture needs, equipment selection is based on its operational type, scope of application, aquaculture type, and budget. Aquaculture equipment with high environmental compatibility is selected from a model library, and layouts such as linear, triangular, and rectangular are employed. Choosing the appropriate layout requires careful consideration of the advantages and disadvantages of each method, environmental requirements, and planning circumstances. A linear layout offers advantages such as smooth water flow and flexible expansion, but suffers from low space utilization and poor wind and wave resistance. A triangular layout offers advantages such as high structural stability, strong wind and wave resistance, centralized management, and high feed utilization, but requires dense aquaculture space and complex planning, requiring consideration of the overall structure and multiple connection points. A rectangular layout offers advantages such as stable water flow, strong wind and wave resistance, high space utilization, and easy management and maintenance, but requires greater complexity in zoning, layout design, and planning, and carries higher initial investment costs. Furthermore, marine aquaculture equipment should be spaced 50 to 100 meters apart, depending on the species being cultivated, current velocity, and water quality, to ensure good water circulation. Channels should also be spaced a few to tens of meters apart to allow safe landing and passage for vessels. This design principle allows for appropriate distances between equipment and connectors, enabling efficient layout and deployment through modular packaging.

[0122] Initial ranching plans are planned based on the natural environment, taking into account factors such as marine climate, marine geology, seawater quality, and marine biomass. Eligible aquaculture equipment is then selected and selected. A corresponding virtual marine environment is constructed. Based on a simulated environmental model, aquaculture equipment from a model library is quickly and efficiently laid out and deployed according to the geographic characteristics, aquaculture needs, and equipment layout requirements. This approach effectively evaluates the aquaculture performance, environmental impact, and economic benefits of different layout options under various environmental conditions, as well as the equipment's stability and operational capabilities. Based on economic feasibility, layout rationality, operational effectiveness, and sustainable output, a modern approach, using virtual assembly and simulation layout, employs model packaging and simulated assembly on a virtual platform. This approach leverages engineer experience and virtual verification results to achieve customized equipment, comprehensive plan evaluation, and sustainable simulation optimization. Enterprises can test and troubleshoot equipment designs and overall layouts at minimal cost, enabling theoretical and simulation verification of plans on the platform before implementation. This significantly reduces integration, deployment, testing, and optimization costs, shortens the time from design to implementation, and effectively accelerates the economic benefits of marine ranching projects, providing a solid technical foundation for the scientific layout and operation of marine ranches.

[0123] Using digital and simulation technologies to assist in the layout planning and design of marine ranches, by building a virtual model of the marine ranch, assembling virtual equipment, and deploying design solutions, the multiple impacts of different layout options on aquaculture performance, environmental impact, and economic benefits can be effectively simulated, predicted, and evaluated within a virtual simulation environment. Furthermore, utilizing the virtual simulation platform to independently test each unit and conduct integrated system testing effectively ensures the functional and performance reliability of each unit, as well as the coordination and stability of the entire equipment platform.

[0124] In this solution, we build Figure 7 The technologies used in the large-scale aquaculture equipment customization platform based on digital twins are as follows:

[0125] (1) Developed in Java, using OpenGL as the underlying 3D model rendering; submitting input data based on vertex data, material attributes, and lighting information input by the system, and the underlying hardware GPU performs screen rendering and secondary 3D simulation graphics display UI rendering;

[0126] (2) Build an approximate physical environment based on the real-time physical simulation and calculation provided by Bullet; configure the basic properties of the physical engine, build a digital twin simulation environment including gravity, friction, and acceleration, allow it to perform mechanical movements such as collisions, falls, and linear motion, and provide the platform with approximate physical kinematic simulation;

[0127] (3) Define and encapsulate the twin model based on ECS, and use dependency injection and events to decouple and communicate modules; define basic components including entity components, sensor components, and processor components, define systems for processing each component, use dependency injection frameworks for control system creation and dependency injection, and define various event systems for decoupling and communication between modules to enhance system flexibility and maintainability;

[0128] (4) Use the LSP protocol to provide code prompts and verification for user scripts and dynamically load and run them; during the development process, configure the compiler to use the LSP protocol, automatically obtain code prompts and error prompts through real-time code prompts and code verification functions, and dynamically load and run user scripts. Add a monitor to automatically detect file changes and reload the script, providing a good programming experience and development environment for the platform;

[0129] (5) Realize the interaction of user graphical interface based on Swing and realize cross-operating system operation of Windows / Linux / Mac.

[0130] The method for constructing a large-scale aquaculture equipment platform based on digital twins takes the customization of large-scale aquaculture equipment planned for marine ranching as the object, proposes a method for standardized design, integrated assembly, unit testing, and simulation optimization of marine ranching equipment, and develops a modern marine ranch design and planning platform to solve the following key technical problems: (1) Build a general model library through equipment parameterization and modularization strategies, reduce R&D complexity and improve design flexibility in the form of standardized components, and support customized design of large-scale aquaculture equipment with rapid parameterization and rapid modular reuse. (2) Build an equipment customization platform, combine it with the marine scene simulation model, and use digital twin technology to perform equipment virtual assembly and solution layout planning, shorten the R&D cycle and reduce R&D costs by designing, assembling, debugging, and optimizing in parallel; (3) Use equipment parameterization and modularization strategies for standardized and semi-standardized R&D, use the model library and model tree functions of the software platform to quickly export the production BOM material list, use R&D changes to drive production changes, and promote rapid mass production of equipment.

[0131] The principles of this solution are as follows:

[0132] When designing large-scale aquaculture equipment to accommodate changes in equipment size, in-depth consideration must be given to complex structural coordination. High-precision geometric design is required to ensure overall structural coordination and robustness. The design of dynamic components must prioritize proper placement, scientific operation, and cost-effectiveness. This solution comprehensively considers mechanical structure, functional adaptation, dynamic component design, and layout optimization through parameter packaging technology, virtual layout, and motion simulation. Component size and position can be rapidly adjusted through parameterization and modularization, while virtual assembly and layout are used to determine their optimal size and position. Static components ensure stable and sustainable operation through rational structural coordination. Dynamic components, while requiring a minimum number, maximize operational coverage, ensuring their deployment locations and number maximize conservation efficiency and minimize resource consumption. Changes in equipment quantity require equipment distribution design and overall layout optimization. This solution utilizes virtual simulation technology combined with marine geographic information to build a realistic marine environment model that incorporates elements such as coastline and sea depth. Based on this, a modular design approach is employed to package equipment into independent modules with standardized interfaces, enabling rapid and efficient layout and deployment based on geographic characteristics and aquaculture needs.

[0133] In order to solve the problems of coordination of complex structures of static components in equipment, multiple functional adaptation problems, rationality of location of dynamic components, scientificity of quantity, work efficiency and other issues; taking into account the spatial rationality and environmental adaptability of the overall layout of the ranch, relying on large-scale breeding equipment customization platform, build four common equipment models, split the core components, objectify, modularize and parameterize the mechanical parts and structure models, and unitize the equipment platform. Through the methods of variant design and configuration design, the components can be quickly assembled and deployed, and the quantity can be quickly superimposed, thus forming a dynamic adjustment of equipment and an efficient layout strategy, providing a scientific basis and technical guarantee for the large-scale construction of marine ranches.

[0134] Through modular, parametric, and standardized equipment design, and leveraging digital design platforms to enable rapid customization and collaborative manufacturing, the rapidly exported BOM effectively resolves the conflict between custom design and mass production of large-scale aquaculture equipment. Standardized and semi-standardized production models reduce costs while ensuring product flexibility and adaptability, providing a solid technical foundation for large-scale equipment production and the improvement of the industrial chain.

[0135] Compared with existing technologies and methods, this solution offers the following advantages and significant impacts: First, through modular and parameterized equipment design strategies, a common component and model library is established. Within the digital twin planning platform, rapid equipment parameterization and modular reuse reduce design complexity, increase flexibility, shorten equipment R&D cycles, enhance customization capabilities, and rapidly respond to market demands. Second, the platform constructs environmental simulation models of complex systems, utilizing virtual simulation technology to comprehensively test and verify the structural rationality and functional integrity of the equipment. This optimizes the equipment's adaptability to diverse environmental conditions, avoiding mismatches and irrationalities in actual deployment. This shortens the commissioning cycle, reduces equipment integration and commissioning costs, and improves equipment coordination and environmental adaptability. Furthermore, the parametric / modular R&D approach promotes standardized / semi-standardized production models, automatically deriving bills of materials (BOMs), effectively streamlining the equipment mass production process, reducing solution implementation costs, optimizing resource allocation, and minimizing material waste. This improves production efficiency, accelerates production plan implementation, reduces overall solution implementation costs, and ultimately maximizes economic benefits.

[0136] This solution effectively addresses the shortcomings of existing technologies and significantly improves the efficiency of designing and deploying large-scale marine aquaculture equipment by building a customized digital twin platform for large-scale marine aquaculture equipment. This platform encapsulates units to establish a model library, customizes equipment with parameter changes, plans overall layout, conducts virtual assembly and simulation simulations, optimizes and modifies design solutions, and rapidly exports production bills of materials. By parameterizing and structuring aquaculture equipment, standard and semi-standard methods based on object-oriented thinking promote mass production of equipment in the manufacturing industry, improving project economics and overall benefits. This approach provides strong technical support and practical paths for the efficient and sustainable development of marine ranching, safeguards the modernization of marine ranching construction, and provides technical support for addressing the decline of marine fishery resources.

[0137] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A method for constructing a large-scale breeding equipment platform based on digital twins, characterized in that: The following steps are involved: S1: Obtain the size and quantity of parts, model the parts, and assemble the parts into equipment; S2: Save and import the equipment into the model library; S3: Classify the equipment in the model library to obtain aquaculture platforms, aquaculture vessels and intelligent cages; S4: Parametric packaging and modular packaging of equipment; S41: Parts are classified into structural parts and non-structural parts according to the functions of the equipment and the properties of the parts in the equipment; According to the function of the equipment and the properties of the parts in the equipment, the size of the parts is divided into flexible size and rigid size; S42: Determine the base size of the equipment; S43: Construct the flexible size parameter expression of the part based on the relationship between the flexible size of the part and the equipment reference size; S44: Construct a quantity expression for structural parts based on the relationship between the number of structural parts and equipment size changes; S45: Construct the coordinate expression of the flexible size of the part based on the relationship between the flexible size of the part and the three-dimensional coordinate center of the equipment; S46: Determine the scale of the modeled equipment and the coordinate center position of the modeled equipment; S47: Determine the expansion mode of the model based on the coordinate center of the modeled equipment; S48: Setting basic expansion parameters of the modeled equipment, wherein the basic expansion parameters include a step length and an expansion quantity; S5: Virtually assemble and layout the equipment in the model library; S6: Export the production material list.

2. A method for constructing a large-scale aquaculture equipment platform based on digital twins according to claim 1, characterized in that: The step of virtually assembling the equipment in step S5 includes: S51: By assembling the equipment in the model library instead of the actual components, the matching, installation accuracy and spatial distribution of the equipment in the model library are virtually verified.

3. A method for constructing a large-scale aquaculture equipment platform based on digital twins according to claim 2, characterized in that: After virtually assembling the equipment, evaluate the equipment in the model library in the following ways: Evaluate the integrity of the equipment in the model library; wherein, determine whether the number of parts of the equipment is complete, and if not, execute step S1 to re-acquire parts for the equipment; Evaluate the assembly accuracy of the equipment in the model library; perform virtual assembly on the modeled parts to verify whether the assembly is reasonable. If misalignment or penetration occurs, re-execute step S11 to reassemble the parts; measure the gap between the parts assembly to determine whether the assembly error is within the threshold. For assemblies where the assembly error exceeds the threshold, re-execute step S1 to reassemble the parts.

4. A method for constructing a large-scale aquaculture equipment platform based on digital twins according to claim 3, characterized in that: The step of performing virtual layout of equipment in step S5 includes: S52: Build an ocean geography model; S53: Retrieve modularized and packaged equipment from the model library and arrange it in the ocean geographic model.

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