Large-scale breeding equipment platform construction method based on digital twinning

Abstract

The invention discloses a large-scale breeding equipment platform construction method based on digital twinning, and belongs to the technical field of marine breeding equipment construction, and the method comprises the following steps: S1, obtaining the size and number of parts, carrying out part modeling, and assembling the parts into equipment; s2, storing and importing the equipment into a model library; s3, equipment in the model library is classified, and a breeding platform, a breeding work ship and an intelligent net cage are obtained; s4, performing parametric packaging and modular packaging on the equipment; s5, performing virtual assembly and virtual layout on the equipment in the model library; and S6, exporting a production material list. According to the large-scale breeding equipment platform construction method based on digital twinning, the problems of cost control, technical support and industrial chain improvement in the customized design and batch production process of marine breeding equipment are solved.

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] With the increase in the intensity of marine fishing and the deepening of marine pollution, my country has begun to vigorously promote sea farming and fishing, and through the construction of a "blue granary", the development of marine aquaculture from offshore to offshore can make up for the overfishing of the ocean, balance marine resources and restore marine ecological diversity. However, due to the immaturity and unscientific nature of marine aquaculture programs in recent years, and the irregular and unreasonable design of large-scale marine aquaculture equipment, the marine environment has suffered great damage.

[0003] Marine ranching refers to the use of modern marine engineering technology and natural productivity in specific sea areas, and the deployment of aquaculture equipment under human intervention for scientific cultivation and management to form artificial fisheries. It is a modern solution for the sustainable use of marine resources that can increase fishery resources and improve the quality of seafood. At present, various aquaculture equipment used in marine ranching has been successfully deployed, creating good economic benefits for the aquaculture market. Common equipment includes deep-sea automatic rotating marine fish aquaculture platforms, fully submerged suspended fixed-depth high-resistance aquaculture platforms, suspended dynamic positioning aquaculture platforms, semi-submerged rectangular column implicit aquaculture platforms, etc. With the continued rise in the popularity of marine ranching, the manufacturing industry of large-scale marine aquaculture equipment urgently needs a feasible and effective solution: on the one hand, it is necessary to shorten the R&D and design cycle of equipment with large volume, complex structure, numerous functions and complicated systems, so as to meet market needs and be able to quickly put into production and manufacture and realize assembly and deployment; on the other hand, the marine environment is highly complex and dynamically changing. In order to adapt to the specific deployment environment to ensure the stability, safety, efficiency and sustainability of the equipment, it requires the diversification, personalization and customization of some equipment of general large platforms. 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 more difficult, and 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.

[0004] At present, there are still many problems to be solved in the research and development of large-scale equipment, equipment customization, and equipment mass production:

[0005] (I) The equipment R&D design cycle is long, customization is insufficient, and it is difficult to respond quickly to market demand. The existing solutions lack effective modularization and parameterization strategies in the design stage, resulting in a cumbersome and lengthy equipment design process. Faced with the rapidly changing market demands, existing technologies are difficult to quickly carry out equipment modifications and optimization designs, and the customization capabilities are seriously insufficient to meet specific deployment environments and breeding needs, and the speed of implementation of marine ranching solutions.

[0006] (ii) The cost of equipment integration and assembly is high, and the test 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 that in the land environment. At present, the existing technical testing methods are immature, and verification tests are carried out by equipment production and integrated assembly, so that the coordination and environmental adaptability of the equipment cannot be fully verified during the deployment phase, resulting in an extension of the debugging cycle and a significant increase in the cost of subsequent optimization and adjustment.

[0007] (III) The difficulty of mass production of equipment is high and the production model is imperfect. In the mass production of equipment parts, there is a lack of support for standardized and semi-standardized production concepts, resulting in a lack of scientific planning for equipment production plans and low efficiency in exporting bills of materials (BOMs). Under such circumstances, there is a serious waste of materials in the production process, chaotic resource allocation, and it is difficult to effectively implement production plans, resulting in inefficient production processes and high costs, which affects economic benefits.

[0008] Existing methods lack scientific planning and modern technical support for how to quickly design, customize, verify solutions, and achieve mass production of large-scale equipment platforms based on marine ranches. Existing methods make it difficult to conduct a comprehensive assessment of the dense structure of large-scale equipment, and it is difficult to analyze the rationality and efficiency of the structure and function coordination of aquaculture equipment, so as to design an overall solution with accurate selection and proper layout. Secondly, the integration of various equipment is difficult, the degree of integration is low, and the comprehensive benefits are not significant. Different companies across regions have difficulty in communicating during the equipment research and development process, and the design difficulty and research and development cycle increase, resulting in unreasonable and mismatched equipment when the platform is integrated. At the same time, the integration difficulty and debugging cycle become longer, which directly affects the project benefits of the marine ranch. In addition, from the perspective of achieving the global optimization goal of maximizing the economy, 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 speed up the implementation of production plans. Summary of the invention

[0009] In order to overcome the defects of the prior art, the present invention provides a method for constructing a large-scale breeding equipment platform based on digital twins to solve the above-mentioned problems.

[0010] 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:

[0011] S1: Obtain the size and quantity of parts, model the parts, and assemble the parts into equipment;

[0012] S2: Import the equipment into the model library;

[0013] S3: Classify the equipment in the model library to obtain aquaculture platforms, aquaculture vessels and intelligent cages;

[0014] S4: Parametric packaging and modular packaging of equipment;

[0015] S5: Virtually assemble and virtually layout the equipment in the model library;

[0016] S6: Export the production material list.

[0017] Preferably, in step S4, the step of parameterizing and packaging the equipment includes:

[0018] S41: Parts are divided into structural parts and non-structural parts according to the functions of the equipment and the properties of the parts in the equipment;

[0019] The size of the parts is divided into flexible size and rigid size according to the function of the equipment and the properties of the parts in the equipment;

[0020] S42: Determine the reference size of the equipment;

[0021] S43: Construct a parameter expression of the flexible size of the part based on the relationship between the flexible size of the part and the equipment reference size.

[0022] 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.

[0023] Specifically, the step of performing parameterized packaging on the equipment also 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.

[0024] It is worth noting that, in step S4, the step of modularizing the equipment includes:

[0025] S46: determining the scale of the modeled equipment and the coordinate center position of the modeled equipment;

[0026] S47: Determine the expansion mode of the model based on the coordinate center of the modeled equipment;

[0027] S48: Setting basic expansion parameters of the modeled equipment, wherein the basic expansion parameters include a step length and an expansion quantity.

[0028] Preferably, the step of virtually assembling equipment in step S5 includes:

[0029] 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.

[0030] Optionally, after virtually assembling the equipment, the equipment in the model library is evaluated by:

[0031] 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 reacquire parts for the equipment;

[0032] Evaluate the assembly accuracy of the equipment in the model library; wherein, perform virtual assembly on the modeled parts to verify whether the assembly is reasonable. If misalignment or penetration occurs, re-execute step S11 to re-assemble the parts; measure the clearance of the parts assembly to determine whether the assembly error is within the threshold. For the assembly whose assembly error exceeds the threshold, re-execute step S1 to re-assemble the parts.

[0033] Specifically, the step of performing virtual layout of equipment in step S5 includes:

[0034] S52: Build an ocean geography model;

[0035] S53: Retrieve modular packaged equipment from the model library and arrange it in the ocean geographic model.

[0036] The beneficial effects of the present invention are as follows: in the large-scale aquaculture equipment platform construction method 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 and manufacturing coordination of equipment are realized, and modular component design ideas are 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, 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 of marine aquaculture equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a flow chart of a method for constructing a large-scale breeding equipment platform based on digital twins in one embodiment of the present invention;

[0038] Figure 2 Schematic diagram of a digital twin platform model library in one embodiment of the present invention;

[0039] Figure 3 A schematic diagram of equipment parameterization in one embodiment of the present invention;

[0040] Figure 4 A schematic diagram of equipment modularization in one embodiment of the present invention;

[0041] Figure 5 This is a schematic diagram of the assembly method of the aquaculture platform "Hengyi No. 1";

[0042] Figure 6 A virtual layout diagram of a marine ranch in one embodiment of the present invention;

[0043] 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

[0044] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but 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 can be combined with each other as long as they do not conflict with each other.

[0045] like Figure 1-7 As shown, a method for constructing a large-scale breeding equipment platform based on digital twins includes the following steps:

[0046] S1: Obtain the size and quantity of parts, model the parts, and assemble the parts into equipment;

[0047] S2: Import the equipment into the model library;

[0048] S3: Classify the equipment in the model library to obtain aquaculture platforms, aquaculture vessels and intelligent cages; the classification management function is the basis for building 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 regular manner; the classification of each type of aquaculture equipment is mainly based on factors such as spatial structure, functional use and use environment; the aquaculture platform is further classified according to the functions of self-elevating, semi-submersible, floating and mobile; the aquaculture vessels are further classified according to functionality or activity range; the intelligent cages are further classified according to the functions of semi-submersible, bottom-sitting, fully submersible and fixed pipe pile;

[0049] S4: Parametric packaging and modular packaging of equipment;

[0050] S5: Virtually assemble and virtually layout the equipment in the model library;

[0051] S6: Export the production material list; adopt standardized and semi-standardized thinking in the research and development process to achieve efficient collaboration among 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.

[0052] 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 coordination of equipment are realized. 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 some parts with high customization requirements, semi-standardized design and production are used, that is, based on the 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 improvement of the industrial chain in the customized design and mass production of marine aquaculture equipment.

[0053] like Figure 2 As shown in the figure, the construction of the model library also relies on 3D modeling technology, parametric packaging technology and modular packaging technology. 3D modeling technology refers to the use of computers to create object models in a virtual 3D space. In the process of building the model library, by obtaining the size, number of parts, and assembly relationship of general breeding equipment parts, and using third-party software for 3D modeling and assembly, the mechanical parts can be combined into a virtual standard object. Each virtual standard object is a general breeding equipment, and these objects can form the most basic model library through classification by function, structure, etc.

[0054] However, the basic model library does not have the function of customizing equipment. Therefore, it is necessary to parametrically encapsulate and modularize the equipment so that it can be quickly deformed and reused according to needs, allowing engineers to quickly, effectively and accurately customize a piece of equipment. Parametric design means that the size, geometric relationship and adaptive properties of the model can be controlled and adjusted through parameters. During the design process, the parametric model can dynamically adjust the size and structure according to project requirements. For example, when the capacity of the buoyancy tank is adjusted or the grid density of the aquaculture cage changes, these adjustments will be fully reflected in the overall equipment through the encapsulated association relationship, and other structures will deform accordingly with the changes without the need for designers to reconstruct the entire model. Modular design allows the equipment to be decomposed into independently operable unit modules, allowing independent design, testing and optimization, and then integrated into the overall system. Modular design not only allows faster prototype verification and troubleshooting, but also makes the overall design more flexible and maintainable.

[0055] At the same time, digital equipment models involve information at multiple levels, such as model size, size relationship, color material and physical properties. This information is integrated into an independent and complete digital model through packaging technology, forming an information island. The packaged model carries complete performance and attribute information, and will not lose any performance indicators and related attribute information when running independently in a virtual environment. The packaged model not only provides a reliable data foundation for the overall design, but also ensures the consistency and integrity of information between models. The model library created based on the packaged model can realize the rapid variation and reuse of component equipment, and ensure that the internal information and various associations are not affected.

[0056] The establishment of a model library can significantly improve design efficiency, allowing designers to quickly call models with clear functional structure classifications during the design process and conveniently generate solutions with different configurations. Using digital twin technology for virtual verification and optimization can significantly save time and resource costs, while significantly improving the accuracy and reliability of the design. The equipment model library brings the ability to define classification and rapid design, which will greatly shorten the complexity and cycle of R&D, increase the rate of product iteration, and promote the transformation of marine ranches from traditional farming methods to modern and intelligent models.

[0057] 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:

[0058] S41: According to the function of the equipment and the properties of the parts in the equipment, the parts are divided into structural parts and non-structural parts; structural parts refer to parts that bear the main load 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, steel plates, etc.; non-structural parts refer to components that do not directly bear the main load of the structure and serve other functions in the equipment, such as aisles, fishing nets, etc. An important way to distinguish whether a part is a structural part or a non-structural part is whether the loss or damage of the part will cause the equipment structure to fail. If so, it is a structural part, and if not, it is a non-structural part;

[0059] 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; the size of the parts needs to adapt to changes in the environment, so these sizes are flexible sizes, on the contrary, the size of the parts does not need to adapt to changes in the environment, and these sizes are rigid sizes; for example, the fishing net of the aquaculture equipment needs to change with the change of the aquaculture area, the length and width of the fishing net are flexible dimensions, and the thickness, that is, the diameter of the rope, is a rigid dimension; when the size of the equipment changes, the length of the aisle changes accordingly, so the length of the aisle is a flexible dimension, and the aisle needs to meet the needs of people, and its width and thickness do not need to change, so the width and thickness of the aisle are rigid dimensions;

[0060] S42: Determine the basic size of the equipment, generally import it into the platform based on the length, width and height of the equipment;

[0061] S43: Construct a parameter expression of the flexible size of the part based on the relationship between the flexible size of the part and the equipment reference size.

[0062] S44: Construct a quantitative expression for the structural parts based on the relationship between the number of structural parts and the change in equipment size. 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 axes 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;

[0063] S45: Construct a coordinate expression of the flexible dimension of the part (such as the corresponding displacement or rotation of x, y, and z) according to the relationship between the flexible dimension of the part and the three-dimensional coordinate center of the equipment.

[0064] Parametric packaging and modular packaging are designed to support the rapid customization and design of large-scale breeding equipment with size changes 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 parts and frame models must be abstracted into standard objects through geometric modeling technology. Using parametric design technology, the parametric expression of geometric features is 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 assembled on the platform.

[0065] Explanation of parameterized packaging:

[0066] Set parameterization completion indicators, which include parameterization comprehensiveness indicators and parameterization accuracy indicators. The parameterization comprehensiveness indicators are as follows: 1. Whether 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.

[0067] 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 (length, width and height) of the equipment 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 sizes are defined as flexible or rigid. For example, the enclosing truss of the breeding equipment, as a key structural component, needs to bear loads including its own weight, breeding equipment, the weight of aquatic animals, waves, water, and wind, so it can be determined 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 between the part and the benchmark size are calculated.

[0068] Take the length, width and height of the platform breeding area as an example of size change:

[0069] The parameter change design of the parts is performed according to the length value of the platform breeding area (in this embodiment, the length direction is set to the X-axis in the coordinate system):

[0070] 1. The front transverse truss, the back transverse truss, the front fishing net, the back fishing net and the bottom fishing net are proportionally extended and retracted according to the length change of the platform breeding area; the left positioning axis, the left truss, the left fishing net, the middle aisle, the middle fishing net and the eight fixed oblique trusses are displaced accordingly according to the length change of the platform breeding area, and the corresponding local coordinates are set and obtained respectively:

[0071] The length of the front transverse truss and the back transverse truss 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 at the same time t , so L t Half of the actual length;

[0072] The lengths of the front fishing net, the back fishing net, and the bottom fishing net are L 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 of the ratio of the length of the fishing net to the length of the platform breeding area;

[0073] Coordinate ΔL of the left positioning axis in the length direction a , the lengthwise coordinate of the left fishing net ΔL f , the lengthwise coordinate of the left aisle ΔLp , the lengthwise coordinate of the left truss ΔL t , the lengthwise coordinate of the left fixed diagonal truss ΔL 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;

[0074] The length coordinate of the middle aisle ΔL p , the lengthwise coordinate of the middle fishing net ΔL f , the lengthwise coordinate of the middle vertical short truss ΔL tms , the lengthwise coordinates of the four middle diagonal 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;

[0075] 2. The setting interval of the front vertical short truss or the back vertical short truss step 1, expand the corresponding quantity n according to the length value length relationship of the platform breeding area, and obtain the quantity expression:

[0076] 3. Both the front aisle and the back aisle can be divided into three parts, namely 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 in 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:

[0077] The parameter expressions of the length values ​​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;

[0078] The lengthwise coordinate ΔL of the left long aisle in the two long aisles land the coordinate ΔL in the length direction 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 simultaneously in the positive and negative directions of the corresponding axis, so the value in the parameter expression is half of the actual length, and it is therefore expressed by multiplying by 0.5, that is, the actual displacement = (length-the length of the connecting aisle) / 2.

[0079] The parameter change design of the parts is performed according to the width value width of the platform breeding area (in this embodiment, the width direction is set to the Y axis in the coordinate system):

[0080] 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:

[0081] The width of the side truss or the middle truss is 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, s is the initial size 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, so it is expressed by multiplying by 0.5.

[0082] The width of the side aisle is W p and the width of the aisle in the middle 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 When i = (the width of the original middle aisle / the width of the original platform breeding area)*0.5, since the width of the platform breeding area is composed of three parts: "the width of the aisle", "the width of the front long aisle" and "the width of the rear long aisle", the values ​​of "the width of the front long aisle" and "the width of the rear long aisle" are both 0.2, so when calculating the length of the side corridor, it is necessary to subtract the width of the front and rear long aisles, that is, 2*0.2;

[0083] The width of the bottom fishing net is W f The parameter expression is: W f=width*i, i=(width of the original bottom fishing net / width 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.

[0084] 2. Set the interval of the short vertical trusses on the side in step 2, expand the corresponding number according to the width relationship, eliminate the rounding error, and get the quantity expression: Where width%step2 is the remainder of width over step2;

[0085] 3. The rear positioning axis, the rear fishing net, the rear aisle, the rear truss and the four fixed inclined trusses are displaced according to the width value width of the platform breeding area, and the corresponding local coordinates are set and the coordinate expression in the width direction is obtained:

[0086] Coordinate W of the back positioning axis in the width direction a0 , the width coordinate W of the back fishing net f0 , the width coordinate of the aisle at the back, W 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;

[0087] The parameter change design of the parts is performed according to the height value height of the platform breeding area (in this embodiment, the height direction is set to the Z axis in the coordinate system):

[0088] 1. The vertical short truss and positioning axis are proportionally expanded and contracted, resulting in:

[0089] The height of the vertical short truss H t The parameter expression is H t =height*0.5+s, s is the initial size adjustment parameter; during scaling, the object will stretch along both the positive and negative directions of the corresponding axis, so the value in the parameter expression is half of the actual length, so it is expressed by multiplying by 0.5;

[0090] 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.

[0091] 2. The lowest truss and the lowest fishing net are displaced in proportion, and we get:

[0092] The height coordinate ΔH of the bottom truss t and the height coordinate ΔH of the bottom fishing net f The coordinate expression of ΔH t =ΔH f =-height+a, where a is the initial coordinate adjustment parameter;

[0093] 3. Set the interval of the bottom truss in step 3, expand the corresponding quantity according to the height relationship, eliminate the rounding error, and get the quantity expression as follows: Where height%step3 is the remainder of height over step3.

[0094] Completion evaluation and optimization:

[0095] The equipment with completed parametric packaging is parametrically modified and the corresponding parametric completion index is evaluated. The parts 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. Supplement the missing parametric packaging of the affected parts; 2. Adjust the parametric function of the parts; 3. Redefine the part expansion attributes.

[0096] It is worth noting that if Figure 4 As shown, in step S4, the step of modularizing the equipment includes:

[0097] S46: determining the scale of the modeled equipment and the coordinate center position of the modeled equipment;

[0098] S47: Determine the expansion mode of the model based on the coordinate center of the modeled equipment;

[0099] S48: Setting basic expansion parameters of the modeled equipment, wherein the basic expansion parameters include a step length and an expansion quantity.

[0100] Explanation of modular packaging:

[0101] Set modular completion indicators, which include modular independence indicators, modular reusability indicators and modular expansibility indicators; modular independence indicators are as follows: 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 as follows: 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 expansibility indicators are as follows: whether the equipment can be quickly expanded according to needs.

[0102] Proportional import and axis setting: Based on the model that has been parametrically processed, a 1:1 scale is imported to form a pile-type movable breeding platform, and the center of gravity of the breeding area is set as the axis.

[0103] 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.

[0104] 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.

[0105] Completion evaluation and optimization: Modularize the equipment that has been completed with modular packaging and evaluate the corresponding modular completion indicators. Equipment that fails the evaluation will be optimized as follows, and the evaluation and optimization will be repeated until the equipment meets the standards and is updated to the model library: 1. Adjust the equipment modularization parameters; 2. Redefine the equipment expansion attributes.

[0106] Preferably, the step of virtually assembling equipment in step S5 includes:

[0107] 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 the 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 joints of the thin floors of the aisles, the outer fences of the cages, 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 overall platform is complicated and cumbersome, involving multiple assembly methods and multiple assembly points. Therefore, it is very necessary to replace the actual components for assembly by semi-simulation based on three-dimensional models, virtually verify the matching of components, the installation accuracy and the scientificity of the spatial distribution of the overall equipment, and generate a set of mature platform assembly solutions;

[0108] For equipment that is a moving part, the equipment is assembled in quantity and position using a virtual layout method by configuring the motion properties, signal logic, and motion logic when the equipment is parameterized. The motion and signal encapsulation is independent of the parameter encapsulation, and the encapsulation process is as follows: setting motion properties, adding drivers, creating signals, binding driver signals, and setting motion logic.

[0109] After step S51, the size of the parameterized packaged equipment is adjusted;

[0110] 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 process, 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 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 stability and rationality of operations in the workshop.

[0111] For example, the crane component is required to complete the feeding work in a certain range of specific areas, grab the feed from the offshore feed ship or feed warehouse, and move it to the breeding and feeding area for feeding the animals. Therefore, the platform is used for customized design to ensure that its layout can cover the entire breeding area and will not cause resource waste or work bottlenecks due to too many or too few cranes.

[0112] Work area analysis: retrieve the breeding equipment platform from the model library, define the boundaries of the breeding area and use measurement tools to determine the size range. Carry out coverage evaluation based on geometric boundary determination, mark the precise coordinates of the feeding point and feeding point and the feeding coverage range. Construct the data of the virtual three-dimensional space to clarify the dynamic range of the crane operation, including the maximum and minimum extension radius, rotation angle, vertical and horizontal operating limits and other data.

[0113] Selection based on working scope: The selection of cranes needs to be compared with technical indicators and parameter matching optimization. First, select crane models with corresponding operating capabilities and technical parameters from the model library according to the defined working scope. Secondly, consider the technical indicators of the candidate crane models such as rated lifting capacity, hoisting speed, mechanical strength, crane weight, structural dimensions, etc.

[0114] Select quantity based on space: Use the platform to build a virtual scene, determine the location of the feed ship / warehouse and the layout of the work platform, ensure barrier-free operation paths and maximum space utilization efficiency after the crane is arranged, and optimize the layout of the plan based on the work area form and feeding point distribution, using matrix arrangement, symmetrical distribution and other layout methods. At the same time, calculate the weight of feed fed by a single crane each time, that is, the operating load, to ensure that the feeding task can be completed within a specific time and the number of cranes will be minimized without overloading.

[0115] Model library call component verification: Arrange the crane components in the virtual environment, perform real-time dynamic virtual simulation, and ensure the accuracy of the model's working range. The first is to verify the rationality of the layout. Since the crane needs to bear a large weight, it needs to be placed in a stable position. At the same time, the crane needs to carry fish feed for plane rotation, fish feed lifting and other actions. It is necessary to ensure that its working space is sufficient and there are no obstacles in the movement trajectory. Otherwise, adjust the installation position of the crane, or take measures such as removing obstacles and limiting the working route of the crane. The second is to verify the rationality of the work. Through simulation, verify whether the working range of the crane meets the needs. If the crane cannot meet the work needs, reselect the crane model. In addition, the crane working trajectory can also be planned, generally using the shortest path method and the segmented straight line method. The shortest path method takes the fish feed collection point as the starting point and the feeding point as the end point, and the straight line distance between the two points is the crane working path; the segmented straight line method uses the same starting point and end point as the above method, and performs horizontal and vertical translation between the two points, and on this basis, horizontal rotation can be added to change the horizontal delivery angle of the crane. The two methods select efficient route solutions with the shortest time, highest safety and relatively short distance through virtual verification. Based on this verification process, the position and related configuration of components can be effectively adjusted to achieve the continuous iterative optimization process of the "design, simulation optimization, and redesign" strategy.

[0116] Optionally, after virtually assembling the equipment, the equipment in the model library is evaluated by:

[0117] Evaluate the integrity of the equipment in the model library; wherein, determine whether the number of parts of the equipment is complete, if not, execute step S1 to reacquire parts for the equipment to supplement the corresponding parts; determine whether the virtual geometry and topological structure of the parts of the equipment are consistent with the actual parts, if not, adjust the size and geometry of the parts of the equipment in the model library according to the actual parts;

[0118] Evaluate the assembly accuracy of the equipment in the model library; wherein, perform virtual assembly on the modeled parts to verify whether the assembly is reasonable. If misalignment or penetration occurs, it indicates that the assembly is incorrect, and re-execute step S11 to re-assemble the parts; measure the clearance of the parts assembly to determine whether the assembly error is within the threshold, and re-execute step S1 to re-assemble the parts for the assembly whose assembly error exceeds the threshold.

[0119] It is worth noting that the step of performing virtual layout of equipment in step S5 includes:

[0120] S52: Build an approximate three-dimensional model of ocean geography;

[0121] S53: Retrieving modularized packaged equipment from the model library and arranging it in the approximate three-dimensional model of ocean geography;

[0122] The overall layout of the equipment needs to be planned and designed in combination with marine geographic information. First, an approximate three-dimensional model of marine geography including elements such as coast shape, island shape, and sea depth is built to simulate the complex geographical features of the ocean. Under the conditions of meeting the characteristics of the geographical environment and aquaculture needs, the equipment is selected according to the working type, scope of application, aquaculture type, and budget cost of the equipment, and the aquaculture equipment with high environmental compatibility is called from the model library, and arranged in a straight line, a Chinese-shaped, and rectangular manner. Choosing a suitable arrangement type requires full consideration of factors such as the advantages and disadvantages of different methods, environmental requirements, and planning conditions. Among them, the straight line arrangement has the advantages of smooth water flow and flexible expansion, but the space utilization rate is low and the wind and wave resistance is poor; the Chinese-shaped arrangement has the advantages of high structural stability, strong wind and wave resistance, centralized management, and high fish feed utilization rate, but the aquaculture space is relatively dense and the planning layout is relatively complex, and the overall structure and multiple connection points need to be considered; the rectangular arrangement has the advantages of stable water flow, strong wind and wave resistance, high space utilization, and convenient management and maintenance, but the difficulty of regional division and layout design planning is relatively high, and the initial investment cost is relatively high. At the same time, marine aquaculture equipment should be kept at intervals of 50 to 100 meters according to the species being cultivated, the speed of the ocean current and the quality of the water to ensure good water circulation; and the channel intervals of several meters to tens of meters should be kept to allow safe landing and passage of operating vessels. Based on this design basis, the appropriate distance between equipment and equipment connectors can be set, and the modularized encapsulated equipment can be used for efficient layout and deployment.

[0123] According to the natural environment, the ranch plan is preliminarily planned, and factors such as marine climate, marine geology, seawater quality, and marine biological quality are fully considered to select breeding equipment that meets the conditions. The corresponding marine virtual environment is built, and based on the simulated environment model, the breeding equipment in the model library is called for rapid and efficient layout and deployment according to the characteristics of the geographical environment, breeding needs, and breeding equipment layout requirements. Through this method, the breeding effects, environmental impacts, and economic benefits of different layout schemes under various environmental conditions, as well as the stability and operation capabilities of the equipment, are effectively evaluated. Starting from economic feasibility, layout rationality, operation effectiveness, and output sustainability, through virtual assembly and simulation layout, model encapsulation, simulated assembly, and other means are used on the virtual platform, and the modern method of customized equipment, comprehensive evaluation schemes, and sustainable simulation optimization is driven by engineer experience and virtual verification effects. Enterprises can test and troubleshoot equipment design and overall layout in advance at a very low cost, and can perform theoretical verification and simulation verification of the scheme on the platform before the scheme is implemented, which greatly reduces the integration, deployment, testing, and optimization costs of the enterprise, reduces the time from scheme design to implementation, effectively accelerates the economic benefit generation cycle of marine ranch projects, and provides a solid technical foundation for the scientific layout and operation of marine ranches.

[0124] Based on digital technology and simulation technology to assist the layout planning and design of marine ranches, by establishing a virtual model of the marine ranch, assembling virtual equipment and deploying design solutions, it is possible to effectively simulate, predict and evaluate the multiple impacts of different layout solutions on aquaculture effects, environmental impacts and economic benefits in a virtual simulation environment. At the same time, using the virtual simulation platform to independently test each unit and perform integrated testing on the system can effectively ensure the functional and performance reliability of the unit and the coordination and stability of the entire equipment platform.

[0125] In this scheme, we build Figure 7 The technologies used in the large-scale breeding equipment customization platform based on digital twins are as follows:

[0126] (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;

[0127] (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 that includes gravity, friction, and acceleration, allow it to perform mechanical movements such as collision, fall, and linear motion, and provide approximate physical kinematic simulation for the platform;

[0128] (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 various components, use dependency injection frameworks for control system creation and dependency injection, define various event systems for decoupling and communication between modules, and enhance system flexibility and maintainability;

[0129] (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;

[0130] (5) Realize the interaction of user graphical interface based on Swing and realize cross-operating system operation of Windows / Linux / Mac.

[0131] 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 ranches as the object, proposes a method for standardized design, integrated assembly, unit testing, and simulation optimization of marine ranch equipment, and develops a modern marine ranch design and planning platform to solve the following key technical problems: (i) 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 modification of equipment parameters and rapid reuse of modularization. (ii) Build an equipment customization platform, combine with marine scene simulation models, 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; (iii) 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.

[0132] The principles of this solution are as follows:

[0133] In the design of large-scale aquaculture equipment, in order to change the size of equipment, we first need to consider the coordination of complex structures. High-precision geometric matching design is required to ensure the coordination and robustness of the overall structure. The design of dynamic components needs to focus on the rationality of position, scientific work and economic benefits. This solution comprehensively considers mechanical structure, functional adaptation, dynamic component design, layout optimization and other aspects through parameter encapsulation technology, virtual layout and motion simulation. The component size and position can be quickly changed through parameterization and modular functions, and the optimal working size and position can be determined by virtual assembly and layout. Static components ensure the stability and sustainability of equipment operation under reasonable structural coordination; dynamic components achieve maximum coverage of the working range under the premise of the minimum number, ensuring that their deployment location and number can achieve the purpose of maximizing conservation efficiency and minimizing resource consumption. In response to the change in the number of equipment, equipment distribution design and overall layout optimization of the solution location are required. This solution uses virtual simulation technology combined with marine geographic information to build a simulated marine environment model including coastline, sea depth and other elements. On this basis, the modular design concept is adopted to encapsulate the equipment into independent modules with standardized interfaces, and fast and efficient layout and deployment are carried out according to the characteristics of the geographical environment and aquaculture needs.

[0134] In order to solve the problems of coordination of complex structures of static components in equipment, adaptation of multiple functions, 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.

[0135] Through modular, parameterized and standardized design of equipment, and with the help of digital design platform, the rapid customization design and production manufacturing of equipment can be realized, and the BOM list can be quickly exported, which can effectively solve the contradiction between customized design and mass production of large-scale breeding equipment. Standardized and semi-standardized production modes can reduce costs while ensuring the flexibility and adaptability of products, providing a solid technical foundation for large-scale equipment production and the improvement of the industrial chain.

[0136] Compared with existing technologies and methods, this solution has the following advantages and outstanding effects: First, through the modularization and parameterization strategy of equipment design, a general component library and model library are built. In the digital twin planning platform, through the rapid variation of equipment parameters and the rapid reuse of modularization, the design complexity is reduced, the flexibility is improved, the equipment R&D design cycle is shortened, the customization capability is enhanced, and the market demand is quickly responded to. Secondly, the environmental simulation model of the complex system is constructed through the platform, and the structural rationality and functional integrity of the equipment are comprehensively tested and verified using virtual simulation technology. Based on this, the adaptability of the equipment under different environmental conditions is optimized to avoid mismatching and unreasonable problems in actual deployment, thereby shortening the debugging cycle, reducing the cost of equipment integration and debugging, and improving equipment coordination and environmental adaptability. In addition, the standardized / semi-standardized production mode is promoted with the parameterized / modularized R&D method, and the bill of materials (BOM) is automatically exported, which effectively simplifies the equipment batch production process, reduces the cost of program implementation, optimizes resource allocation, and reduces material waste. In this way, production efficiency is improved, the implementation of production plans is accelerated, the cost of overall program implementation is reduced, and ultimately the economic benefits are maximized.

[0137] This solution effectively makes up for the shortcomings of existing technologies and greatly improves the design and deployment efficiency of large-scale marine aquaculture equipment by building a customized digital twin platform based on large-scale marine aquaculture equipment, encapsulating units to establish a model library, changing parameters to customize equipment, planning the overall layout of the plan, virtual assembly and simulation deduction plan, design plan optimization and correction, and rapid export of production material lists. By parameterizing / structuring the aquaculture equipment, the standard / semi-standard method of object-oriented thinking promotes the mass production of equipment in the manufacturing industry and improves the economic efficiency and comprehensive benefits of the project. This method provides strong technical support and practical paths for the efficient and sustainable development of marine ranches, ensures the modernization process of marine ranch construction, and provides technical support for solving the decline of marine fishery resources.

[0138] 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. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and 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: 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; S5: Virtually assemble and virtually layout the equipment in the model library; S6: Export the production material list.

2. A method for constructing a large-scale breeding equipment platform based on digital twins according to claim 1, characterized in that: In step S4, the step of parameterizing and packaging the equipment includes: S41: Parts are divided into structural parts and non-structural parts according to the functions 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 according to the function of the equipment and the properties of the parts in the equipment; S42: Determine the reference size of the equipment; S43: Construct a parameter expression of the flexible size of the part based on the relationship between the flexible size of the part and the equipment reference size.

3. A method for constructing a large-scale breeding equipment platform based on digital twins according to claim 2, characterized in that: The step of performing parameterized packaging on the equipment also includes: S44: constructing a quantity expression of the structural parts according to the relationship between the number of structural parts and the change of equipment size.

4. A method for constructing a large-scale breeding equipment platform based on digital twins according to claim 3, characterized in that: The step of parameterizing and packaging the equipment also 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.

5. A method for constructing a large-scale breeding equipment platform based on digital twins according to claim 4, characterized in that: In step S4, the step of modularizing the equipment includes: S46: determining 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.

6. A method for constructing a large-scale breeding equipment platform based on digital twins according to claim 5, 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.

7. A method for constructing a large-scale breeding equipment platform based on digital twins according to claim 6, 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 reacquire parts for the equipment; Evaluate the assembly accuracy of the equipment in the model library; wherein, virtually assemble the modeled parts to verify whether the assembly is reasonable. If misalignment or penetration occurs, re-execute step S11 to re-assemble the parts; measure the clearance of the parts assembly to determine whether the assembly error is within the threshold. For the assembly whose assembly error exceeds the threshold, re-execute step S1 to re-assemble the parts.

8. A method for constructing a large-scale breeding equipment platform based on digital twins according to claim 7, characterized in that: The step of performing virtual layout of equipment in step S5 includes: S52: Build an ocean geography model; S53: Retrieve modular packaged equipment from the model library and arrange it in the ocean geographic model.

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