Three-dimensional visual monitoring system and method for autoclave temperature field

Abstract

The invention provides an autoclave temperature field three-dimensional visual monitoring system and method, and the system employs digital models of products and tools and digital models of autoclave equipment under different working conditions, carries out the simulation of the autoclave temperature field of product distribution under different working conditions according to different production technologies, and carries out the three-dimensional presentation. And meanwhile, the system realizes three-dimensional visual monitoring of the production process by utilizing a sensor, a data acquisition technology and a three-dimensional animation technology. Through the technology, the problem of internal temperature uniformity simulation of the autoclave with different product distributions under different working conditions and the problem of non-transparent internal temperature state detection of the autoclave can be solved, the production efficiency of hot press molding of enterprises is improved, and the energy consumption is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of autoclaves, and in particular relates to a three-dimensional visualization monitoring system and method for the temperature field of an autoclave. Background Art

[0002] In recent years, as the effective working size requirements of domestic autoclaves have gradually increased, as the effective diameter and effective length of autoclaves have increased, the internal structure of autoclaves has also changed accordingly. By changing the air duct and fan, the internal flow field of the autoclave is also different, but the internal temperature uniformity of various autoclaves is a problem that manufacturers have always been concerned about. Under the national dual-carbon policy and the development strategy of green manufacturing, energy conservation and environmental protection of enterprises, it is a development trend to produce a variety of different products and tooling in the same batch under the same autoclave according to their processing requirements, specifications and dimensions. The above production mode requires the study of the internal temperature uniformity of the autoclave with different product distributions under different working conditions.

[0003] The autoclave internal temperature uniformity when unloaded is usually used as an assessment indicator during the autoclave acceptance stage at home and abroad. It has a significant impact on the production and operation of the autoclave. However, most of them now rely on multiple monitoring points for data measurement, and cannot accurately determine the distribution of the specific temperature field inside the autoclave. And with the continuous innovation of the internal structure of the autoclave, it is impossible to measure the temperature field of the internal structure of the new autoclave, which will lead to poor internal uniformity.

[0004] To address these issues, the only way now is to continuously conduct autoclave operation tests under different working conditions to detect the internal and product temperature differences, and continuously adjust various parameters to make the temperature more uniform. Summary of the invention

[0005] The present invention proposes a three-dimensional visualization monitoring system and method for the temperature field of an autoclave. The system uses digital models of products and tooling and digital models of autoclave equipment under different working conditions to simulate the temperature field of the autoclave under different working conditions according to different production processes and present it in three dimensions. At the same time, the system uses sensors, data acquisition technology, and three-dimensional animation technology to achieve three-dimensional visualization monitoring of the production process. This technology can solve the problem of simulating the uniformity of the internal temperature of the autoclave under different working conditions and the problem of opaque detection of the internal temperature state of the autoclave, thereby improving the production efficiency of the hot pressing molding of the enterprise and reducing energy consumption.

[0006] The first aspect of the present invention provides a three-dimensional visualization monitoring system for the temperature field of an autoclave, comprising: a control unit, and at least one autoclave; each autoclave has a different number of fans or internal flow structures;

[0007] The control unit is used to, for any autoclave, use 3D modeling software to model the internal flow field of the autoclave, divide the internal flow field of the autoclave into structured grids, and generate structured grids; perform finite element calculations of the temperature field based on the structured grids, set the flow rate, process temperature and process pressure boundary conditions, adjust the time step of the fluid calculation, obtain the autoclave temperature field distribution image and the temperature change data of each grid node over time, and save the autoclave node temperature field data of each time step; create a complete 3D model of the autoclave equipment and a model library of workpieces and tooling as well as a production process model, and establish an algorithm model for the layout of different products under different working conditions of the autoclave; the algorithm model can schedule the product distribution according to the workpiece, tooling and production process models, and combine the specific autoclave Type, working pressure, working temperature, type of product distribution, by searching the corresponding on-site autoclave working conditions in the database, the autoclave temperature data under this condition can be converted into visualized data in the digital twin through the system integration interface. The actual temperature and temperature field data of each point of the fluid inside the autoclave can be specifically observed and compared in the monitoring system software, and can change with the change of the working time of the autoclave to obtain a curve of the temperature change of a certain point over time; in addition, each section of the autoclave can be intercepted, and the corresponding section temperature cloud map can be generated through the temperature data of each node in the section, so as to observe the overall temperature of the autoclave more intuitively, and analyze the areas with abnormal temperature field, and display the abnormal nodes in the areas with large temperature difference, so as to provide reference opinions for the debugging of the autoclave.

[0008] Optionally, the control unit is specifically configured to perform hexahedral structured grid division on the internal flow field of the autoclave to generate a structured grid.

[0009] Optionally, the control unit is specifically configured to, when dividing the internal flow field of the autoclave into hexahedral structured grids, perform grid encryption processing on positions close to the wall and where the fluid flow direction changes.

[0010] Optionally, the control unit is used to simplify the autoclave components that are affected by the temperature field change of the inner air duct during the heating and insulation process within a preset range when modeling the internal flow field of the autoclave.

[0011] Optional, simplified autoclave components include: fan impeller, cooler.

[0012] Optionally, the internal flow field includes: an air duct, an effective space, a head and a heater.

[0013] A second aspect of the present invention provides a three-dimensional visualization monitoring method for the temperature field of an autoclave, using a system as described in any one of the first aspects, comprising:

[0014] For any autoclave, the internal flow field of the autoclave is modeled using 3D modeling software, the internal flow field of the autoclave is structured grid-divided, and a structured grid is generated;

[0015] According to the structured grid, the finite element calculation of the temperature field is performed, the flow rate, process temperature and process pressure boundary conditions are set, the time step of the fluid calculation is adjusted, the temperature field distribution image of the autoclave and the temperature change data of each grid node over time are obtained, and the temperature field data of the autoclave node at each time step are saved;

[0016] Create a complete 3D model of autoclave equipment and a model library of workpieces and tooling as well as a production process model, and establish an algorithm model for the layout of different products under different working conditions of the autoclave;

[0017] The algorithm model can schedule product distribution according to the workpiece, tooling and production process model. Combined with the specific autoclave type, working pressure, working temperature and product distribution type, the corresponding on-site autoclave working conditions can be found in the database, and the autoclave temperature data under this working condition can be converted into visual data in the digital twin through the system integration interface. The actual temperature and temperature field data of each point of the fluid inside the autoclave can be specifically observed and compared in the monitoring system software, and can change with the change of the autoclave working time, to obtain a curve of the temperature change of a certain point over time;

[0018] Each cross section of the autoclave is intercepted, and the corresponding cross-section temperature cloud map is generated through the temperature data of each node in the cross section, so as to observe the overall temperature of the autoclave more intuitively, analyze the area with abnormal temperature field, and display the abnormal nodes in the area with large temperature difference, so as to provide reference opinions for the debugging of the autoclave.

[0019] A third aspect of the present invention provides a computer-readable storage medium, comprising: a memory and a processor;

[0020] The memory is configured to store executable instructions;

[0021] The processor is configured to implement the method as described in the second aspect when executing the executable instructions stored in the memory.

[0022] The present invention proposes a three-dimensional visualization monitoring system and method for the temperature field of an autoclave. By simulating and emulating the no-load temperature field results of different types of autoclaves and the equipment model, the internal temperature field distribution of the autoclave can be detected and controlled in real time. An autoclave model and product and tooling models are established, and product distribution simulation is performed on the basis of the autoclave space for different product and tooling conditions. An autoclave temperature field database is established, and the autoclave temperature field of a certain size, pressure, temperature and different product distribution can be mapped accordingly, thereby establishing a corresponding three-dimensional visualization monitoring system in the digital model module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 Schematic diagram of temperature field database layout for different products under different working conditions of autoclave;

[0025] Figure 2 Calculate various autoclave temperature field cross-section cloud diagrams for numerical simulation;

[0026] Figure 3 It is the interface of the three-dimensional visualization monitoring system of the autoclave equipment;

[0027] Figure 4 Distribute scheduling algorithm model business processes for multiple products under different operating conditions;

[0028] Figure 5 It is a remote monitoring system for autoclaves. DETAILED DESCRIPTION

[0029] The following is a further introduction to the autoclave temperature field three-dimensional visualization monitoring system and method provided by the present invention in conjunction with the accompanying drawings.

[0030] like Figure 1-5 As shown in the figure, for autoclaves with different internal structures (including different numbers of fans and changes in internal flow structure), the geometric models of the fluid and solid of the autoclave equipment are established using 3D modeling software, and the autoclave parts that have little effect on the flow are simplified to a certain extent, such as fan impellers, coolers and other devices, which will not affect the temperature field changes in the inner air duct during the heating and insulation process; commercial meshing software is used to structure the fluid domain mesh, and high-quality structured meshes are generated to provide a certain guarantee for the accuracy of subsequent simulation calculations. The mesh is imported into professional computing software for finite element calculation of the temperature field, the process temperature and process pressure boundary conditions are set, and the time step of the fluid calculation is adjusted to obtain the temperature field distribution image of the autoclave under the corresponding working conditions and the temperature change data of each grid node over time, and the autoclave node temperature data of each time step is saved for subsequent interactive processing with the digital twin.

[0031] In the autoclave three-dimensional visualization monitoring system software, a complete three-dimensional model of the autoclave equipment and a model library of workpieces and tooling as well as a production process model are created, and an algorithm model for the layout of different products under different working conditions of the autoclave is established. The algorithm model can schedule product distribution according to the workpiece, tooling and production process model, and combine the specific autoclave type, working pressure, working temperature, and product distribution type. By searching the corresponding on-site autoclave working conditions in the database, the autoclave temperature data under this working condition is exported from the simulation calculation software, and the temperature field data in the simulation software is converted into visual data in the digital twin through the system integration interface. The temperature of each point of the internal fluid can be specifically observed in the monitoring system software, and it can change with the change of the working time of the autoclave, and a curve of the temperature change of a certain point over time can be obtained; in addition, each section of the autoclave can be intercepted, and the corresponding section temperature cloud map can be generated through the temperature data of each node in the section, so as to observe the overall temperature of the autoclave more intuitively. It can also analyze the abnormal areas of the temperature field, display the abnormal nodes in the areas with large temperature differences, and provide reference opinions for the debugging of the autoclave. At the same time, the autoclave equipment can be combined with sensors and the data acquisition function of the system, using 3D animation technology to achieve 3D visualization of the production process and record data to optimize the model.

[0032] The present invention can analyze and calculate the flow field and temperature field of the autoclave with different product arrangements under different working conditions, and establish an autoclave temperature field database to import into the three-dimensional visualization monitoring system of the corresponding autoclave equipment respectively, so as to monitor the temperature field conditions of the autoclaves with different types, working conditions and product distributions in real time, integrate multiple autoclaves at one location into one management and control system, and can more conveniently monitor the temperature conditions of multiple autoclave equipment at the same time.

[0033] In a specific embodiment, a three-dimensional modeling software is used to model the internal flow field of the autoclave, including air ducts, effective space, head, heater and other components, and the three-dimensional model is imported into the grid division software to perform structured grid division on the flow field. The structured hexahedral grid can better transfer data between nodes, wherein the grid is encrypted for the position close to the wall and where the fluid flow direction changes. Since the flow change gradient here is large, the resulting temperature change is also correspondingly large, and the encryption of the grid can better reflect the detailed and accurate temperature distribution here. The drawn structured grid is imported into the simulation software, the flow velocity, temperature and pressure boundary conditions are input, the time step is set to 1s, that is, the data is saved once, and the temperature data of the nodes at each time is exported.

[0034] First, the corresponding observable autoclave structural geometric model is established in the digital twin module, including the autoclave cylinder, door structure and other structures, such as Figure 3 Next, establish the autoclave temperature field database, as shown in Figure 2As shown in the figure, the temperature field data corresponding to the autoclave under a specific working condition is retrieved, and the types of autoclave, effective diameter, effective size, working pressure, working temperature and product distribution are searched one by one, and the temperature field data of each node corresponding to the autoclave under this type that changes with time are extracted. The numerical simulation data is imported into the autoclave digital twin temperature control system through the system integration data interface, and the parameters are visualized. Figure 2 As shown, the temperature value of any node at a certain time can be directly observed, and multiple nodes with abnormal temperatures can be analyzed at the same time, and reminders can be issued for corresponding processing; in addition, the temperature curve of each node changing over time can be generated and compared with the process temperature curve, which can more intuitively show that the temperature deviation at certain nodes at certain times is too large.

[0035] Figure 2 They are the cross-sectional temperature field cloud maps of various autoclave flow structures (single fan, double fan, annular duct, etc.) at a certain moment and the cross-sectional temperature field cloud maps of different product distributions at a certain moment. The temperature cloud map at this moment can be constructed by exporting the temperature data of each grid node. This cloud map can most intuitively show the location of the high-temperature and low-temperature areas of the autoclave, providing a corresponding basis for reducing temperature deviation.

[0036] Figure 3 It is the interface of the 3D visualization monitoring system for autoclave equipment. The system combines sensors, data acquisition functions and 3D animation technology to realize the collection of key process parameters such as temperature and pressure, as well as the 3D visualization monitoring of the real-time working conditions of the autoclave.

[0037] Figure 4 Simulate the scheduling of various types of products and tools according to different production processes for autoclaves of different specifications. In the scheduling algorithm process, consider the utilization rate and energy consumption of multiple autoclaves according to the processing requirements of the products to schedule product batches. Figure 5 It is a remote monitoring system for autoclaves.

Claims

1. A three-dimensional visualization monitoring system for the temperature field of an autoclave, characterized in that: include: A control unit and at least one autoclave; each autoclave has a different number of fans or internal flow structures; The control unit is used for, for any autoclave, using three-dimensional modeling software to model the internal flow field of the autoclave, performing structured grid division on the internal flow field of the autoclave, and generating a structured grid; According to the structured grid, finite element calculation of the temperature field is performed, the flow rate, process temperature and process pressure boundary conditions are set, the time step of the fluid calculation is adjusted, the temperature field distribution image of the autoclave and the temperature change data of each grid node over time are obtained, and the temperature field data of the autoclave node at each time step are saved; a complete three-dimensional model of the autoclave equipment and a model library of workpieces and tooling as well as a production process model are created, and an algorithm model for the layout of different products under different working conditions of the autoclave is established; the algorithm model can schedule the distribution of products according to the workpiece, tooling and production process model, and combine the specific type of autoclave, working pressure, working temperature, and type of product distribution by searching for the corresponding The corresponding on-site autoclave working condition can be used to convert the autoclave temperature data under this condition into visualized data in the digital twin through the system integration interface. The actual temperature and temperature field data of each point of the fluid inside the autoclave can be specifically observed and compared in the monitoring system software, and the temperature can change with the change of the working time of the autoclave to obtain a curve of the temperature change of a certain point over time. In addition, each section of the autoclave can be intercepted, and the corresponding section temperature cloud map can be generated through the temperature data of each node in the section, so as to observe the overall temperature of the autoclave more intuitively, analyze the area with abnormal temperature field, and display the abnormal nodes in the area with large temperature difference, so as to provide reference opinions for the debugging of the autoclave.

2. The three-dimensional visualization monitoring system for the temperature field of an autoclave according to claim 1, characterized in that: The control unit is specifically used to perform hexahedral structured grid division on the internal flow field of the autoclave to generate a structured grid.

3. The three-dimensional visualization monitoring system for the temperature field of an autoclave according to claim 2, characterized in that: The control unit is specifically used to perform mesh encryption processing on positions close to the wall and where the fluid flow direction changes when the hexahedral structured grid is divided into the internal flow field of the autoclave.

4. The three-dimensional visualization monitoring system for the temperature field of an autoclave according to claim 1, characterized in that: The control unit is used to simplify the autoclave components within a preset range that are affected by the temperature field change of the inner air duct during the heating and insulation process when modeling the internal flow field of the autoclave.

5. The three-dimensional visualization monitoring system for the temperature field of an autoclave according to claim 4, characterized in that: Simplified autoclave parts include: fan impeller, cooler.

6. The three-dimensional visualization monitoring system for the temperature field of an autoclave according to claim 1, characterized in that: The internal flow field includes: air duct, effective space, head and heater.

7. A three-dimensional visualization monitoring method for the temperature field of an autoclave, characterized in that: A system according to any one of claims 1 to 6, comprising: For any autoclave, the internal flow field of the autoclave is modeled using 3D modeling software, the internal flow field of the autoclave is structured grid-divided, and a structured grid is generated; According to the structured grid, the finite element calculation of the temperature field is performed, the flow rate, process temperature and process pressure boundary conditions are set, the time step of the fluid calculation is adjusted, the temperature field distribution image of the autoclave and the temperature change data of each grid node over time are obtained, and the temperature field data of the autoclave node at each time step are saved; Create a complete 3D model of autoclave equipment and a model library of workpieces and tooling as well as a production process model, and establish an algorithm model for the layout of different products under different working conditions of the autoclave; The algorithm model can schedule product distribution according to the workpiece, tooling and production process model. Combined with the specific autoclave type, working pressure, working temperature and product distribution type, the corresponding on-site autoclave working conditions can be found in the database, and the autoclave temperature data under this working condition can be converted into visual data in the digital twin through the system integration interface. The actual temperature and temperature field data of each point of the fluid inside the autoclave can be specifically observed and compared in the monitoring system software, and can change with the change of the autoclave working time, to obtain a curve of the temperature change of a certain point over time; Each cross section of the autoclave is intercepted, and the corresponding cross-section temperature cloud map is generated through the temperature data of each node in the cross section, so as to observe the overall temperature of the autoclave more intuitively, analyze the area with abnormal temperature field, and display the abnormal nodes in the area with large temperature difference, so as to provide reference opinions for the debugging of the autoclave.

8. A computer-readable storage medium, characterized in that: include: Memory and processor; The memory is configured to store executable instructions; The processor is configured to implement the method according to claim 7 when executing the executable instructions stored in the memory.

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