A method, system, and medium for temperature control of a plywood

Abstract

The application discloses a kind of plywood temperature control method, system and medium, it is related to intelligent control technical field, the method includes: interactive target scene, obtain the product parameter set of target plywood;Carry out the compression correction of material thermal physical property parameter, obtain corrected thermal physical property parameter;Build double-mode equivalent hot-pressing heat transfer model;Carry out hot-pressing simulation, obtain first hot-pressing temperature and second hot-pressing temperature;Obtain target hot-pressing temperature;Obtain first hot-pressing duration and second hot-pressing duration, and calculate mean value as target hot-pressing duration;If target hot-pressing duration satisfies preset hot-pressing tempo, then carry out hot-pressing control.The technical problem that existing technology cannot accurately regulate and control the hot-pressing process of different products, resulting in inaccurate temperature control, unstable hot-pressing process, leading to low plywood production efficiency and poor quality, achieves the technical effect of improving plywood production temperature control precision, production efficiency and product quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent control, and particularly relates to a plywood temperature control method and system and a medium. BACKGROUND

[0002] Heat transfer, glue curing and plate deformation are key influencing factors in the hot pressing and curing process of plywood, which directly affect the quality and performance of the plywood. In the production process of plywood, accurate temperature control is a key link. However, the traditional temperature control method relies on experience and simple control mode, and it is difficult to accurately consider the thermal physical parameters (such as thermal conductivity, specific heat capacity, etc.) of the material, the size parameters of the plate, the working conditions of the hot press and the thermal deformation in the curing process, ignoring these complex factors, resulting in errors in temperature and time control, which makes it impossible to accurately regulate the hot pressing process of different plywood products, causing internal stress, size deformation of the plywood in the hot pressing production process, and even affecting the mechanical properties and appearance quality of the plywood, resulting in unstable production effect, reducing production efficiency and product quality.

[0003] Therefore, in the related art, the hot pressing process of different products cannot be accurately regulated, the temperature control is not accurate, the hot pressing process is unstable, and the technical problem of low production efficiency and poor quality of the plywood exists. SUMMARY

[0004] The present application provides a plywood temperature control method, system and medium, which solves the technical problem that the hot pressing process of different products cannot be accurately regulated in the prior art, the temperature control is not accurate, the hot pressing process is unstable, and the production efficiency and quality of the plywood are poor, and achieves the technical effect of improving the temperature control accuracy, production efficiency and product quality of the plywood production.

[0005] The application provides a plywood temperature control method, which comprises the following steps: interacting with a target scene, and obtaining a product parameter set of a target plywood, wherein the product parameter set comprises material thermal physical property parameters and product size parameters; analyzing thermal compression deformation according to the product size parameters, performing compression correction on the material thermal physical property parameters, and obtaining corrected thermal physical property parameters; combining the corrected thermal physical property parameters, the product size parameters and the material thermal physical property parameters to construct a double-mode equivalent hot-pressing heat transfer model; determining optimal solidification conditions and a limit temperature resistance constraint based on the material thermal physical property parameters, and combining the double-mode equivalent hot-pressing heat transfer model to perform hot-pressing simulation, to obtain a first hot-pressing temperature and a second hot-pressing temperature; weighting the first hot-pressing temperature and the second hot-pressing temperature according to a preset temperature fusion weight, to obtain a target hot-pressing temperature; returning the target hot-pressing temperature to the double-mode equivalent hot-pressing heat transfer model for hot-pressing verification, to obtain a first hot-pressing time length and a second hot-pressing time length, and calculating a mean value as a target hot-pressing time length; and performing hot-pressing control based on the target hot-pressing time length and the target hot-pressing temperature if the target hot-pressing time length meets a preset hot-pressing rhythm.

[0006] In possible implementation manners, the plywood temperature control method further performs the following processing: obtaining finished product size parameters and semi-finished product size parameters in the product size parameters, and calculating size difference information before and after hot pressing; calculating a material thermal physical property parameter change amount in a hot pressing process according to the size difference information and the material thermal physical property parameters through a compression correction model constructed based on regression analysis; and applying the material thermal physical property parameter change amount to the material thermal physical property parameters to obtain corrected thermal physical property parameters.

[0007] In possible implementation manners, the plywood temperature control method further performs the following processing: analyzing and determining a most unfavorable heat transfer section and a most favorable heat transfer section of a target plywood, and defining the most unfavorable heat transfer section and the most favorable heat transfer section as a model reference surface; constructing a first equivalent hot-pressing heat transfer model by combining semi-finished product size information and the model reference surface with the material thermal physical property parameters as the most favorable parameters; constructing a second equivalent hot-pressing heat transfer model by combining the finished product size parameters and the model reference surface with the corrected thermal physical property parameters as the most unfavorable parameters; and wherein the first equivalent hot-pressing heat transfer model and the second equivalent hot-pressing heat transfer model both comprise a pair of two-dimensional heat transfer models based on the most unfavorable heat transfer section and the most favorable heat transfer section.

[0008] In a possible implementation, the plywood temperature control method further performs the following processing: determining the optimal curing temperature and the corresponding optimal curing duration of the glue as the optimal curing condition; obtaining the temperature tolerance limit of the glue and the temperature tolerance limit of the plywood substrate, and taking the lower one as the limit temperature tolerance constraint; obtaining the preset hot-pressing beat of the target scenario, combining the limit temperature tolerance constraint and the optimal curing condition, and performing model initialization configuration of the first equivalent hot-pressing heat transfer model and the second equivalent hot-pressing heat transfer model; respectively performing iterative hot-pressing simulation by the first equivalent hot-pressing heat transfer model and the second equivalent hot-pressing heat transfer model after model initialization configuration; wherein the two-dimensional heat transfer model based on the most unfavorable heat transfer section is used to determine the minimum hot-pressing temperature that meets the optimal curing condition; the two-dimensional heat transfer model based on the most favorable heat transfer section is used to verify that the minimum hot-pressing temperature meets the limit temperature tolerance constraint; if the minimum hot-pressing temperature makes the central interface based on the two-dimensional heat transfer model of the most unfavorable heat transfer section reach the optimal curing condition within the preset hot-pressing beat, and the interface temperature of the central interface based on the two-dimensional heat transfer model of the most favorable heat transfer section meets the limit temperature tolerance constraint; correspondingly outputting the minimum hot-pressing temperature of the first equivalent hot-pressing heat transfer model as the first hot-pressing temperature, and correspondingly outputting the minimum hot-pressing temperature of the second equivalent hot-pressing heat transfer model as the second hot-pressing temperature.

[0009] In a possible implementation, the plywood temperature control method further performs the following processing: if the target hot-pressing duration does not meet the preset hot-pressing beat, step-adjusting the target hot-pressing temperature; based on the step-adjusted target hot-pressing temperature, combining the double-mode equivalent hot-pressing heat transfer model to perform iterative hot-pressing verification, and obtaining an iterative hot-pressing duration; if the iterative hot-pressing duration meets the preset hot-pressing beat in the iteration, performing hot-pressing control on the iterative hot-pressing duration and the corresponding step-adjusted target hot-pressing temperature.

[0010] In a possible implementation, the plywood temperature control method further performs the following processing: if, in the iteration, the target hot-pressing temperature after the Nth step-adjustment is greater than the limit temperature tolerance constraint, and the corresponding iterative hot-pressing duration still does not meet the preset hot-pressing beat; outputting the target hot-pressing temperature after the (N-1)th step-adjustment and the corresponding iterative hot-pressing duration after the (N-1)th step-adjustment as limit hot-pressing parameters; generating a beat-tightness warning, and transmitting the beat-tightness warning and the limit hot-pressing parameters to a user management interface.

[0011] In a possible implementation, the plywood temperature control method further performs the following processing: defining a plurality of temperature collection points, and collecting hot pressing monitoring data in real time; analyzing and determining whether the hot pressing monitoring data meets the limit temperature resistance constraint and the optimal curing condition, and if not, performing feedback correction on the temperature fusion weight.

[0012] The application further provides a plywood temperature control system, comprising: a product parameter set acquisition module configured to interact with a target scene and acquire a product parameter set of a target plywood, wherein the product parameter set comprises material thermal physical property parameters and product size parameters; a corrected thermal physical property parameter acquisition module configured to analyze hot pressing deformation according to the product size parameters, perform compression correction on the material thermal physical property parameters, and acquire corrected thermal physical property parameters; a dual-mode equivalent hot pressing heat transfer model construction module configured to construct a dual-mode equivalent hot pressing heat transfer model in combination with the corrected thermal physical property parameters, the product size parameters, and the material thermal physical property parameters; a hot pressing temperature acquisition module configured to determine an optimal curing condition and a limit temperature resistance constraint based on the material thermal physical property parameters, and perform hot pressing simulation in combination with the dual-mode equivalent hot pressing heat transfer model to acquire a first hot pressing temperature and a second hot pressing temperature; a target hot pressing temperature acquisition module configured to acquire a target hot pressing temperature by weighting the first hot pressing temperature and the second hot pressing temperature according to a preset temperature fusion weight; a target hot pressing time length calculation module configured to return the target hot pressing temperature to the dual-mode equivalent hot pressing heat transfer model for hot pressing verification, acquire a first hot pressing time length and a second hot pressing time length, and calculate a mean value as a target hot pressing time length; and a hot pressing control module configured to perform hot pressing control based on the target hot pressing time length and the target hot pressing temperature if the target hot pressing time length meets a preset hot pressing tempo.

[0013] The application further provides a computer readable storage medium, comprising: a computer program stored thereon, which, when executed by a processor, implements a plywood temperature control method.

[0014] The application provides a plywood temperature control method, system and medium, which interact with a target scene, acquire a product parameter set of a target plywood, perform compression correction on material thermal physical property parameters to acquire corrected thermal physical property parameters, construct a dual-mode equivalent hot pressing heat transfer model, perform hot pressing simulation to acquire a first hot pressing temperature and a second hot pressing temperature, acquire a target hot pressing temperature, acquire a first hot pressing time length and a second hot pressing time length, calculate a mean value as a target hot pressing time length, and perform hot pressing control if the target hot pressing time length meets a preset hot pressing tempo. The application solves the technical problem of the prior art that the hot pressing process of different products cannot be accurately controlled, resulting in inaccurate temperature control, unstable hot pressing process, low production efficiency and poor product quality, and achieves the technical effect of improving the production temperature control precision, production efficiency and product quality of plywood. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments of the present disclosure will be briefly introduced below. In the present application, flowcharts are used to illustrate the operations performed by the system according to the embodiments of the present application. It should be understood that the foregoing or the following operations are not necessarily performed in sequence. On the contrary, various steps can be processed in reverse order or simultaneously according to needs. Meanwhile, other operations can be added to these processes, or one or more steps of operations can be removed from these processes.

[0016] Figure 1 A flowchart of a plywood temperature control method provided by the embodiments of the present application.

[0017] Figure 2 A structural schematic diagram of a plywood temperature control system provided by the embodiments of the present application.

[0018] Legend: product parameter set acquisition module 10, corrected thermal physical property parameter acquisition module 20, double-mode equivalent hot pressing heat transfer model construction module 30, hot pressing temperature acquisition module 40, target hot pressing temperature acquisition module 50, target hot pressing time length calculation module 60, hot pressing control module 70. DETAILED DESCRIPTION

[0019] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described.

[0020] In order to make the purposes, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings. The described embodiments should not be regarded as limiting the present application. All other embodiments obtained by those of ordinary skill in the art without making creative labor are within the scope of protection of the present application.

[0021] In the following description, "some embodiments" are referred to, which describe a subset of all possible embodiments, but it can be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict, the term "first\second" referred to only distinguishes similar objects, and does not represent a specific order for the objects. The terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or server including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or modules not clearly listed or inherent to these processes, methods, products or devices. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used herein are only for the purpose of describing the embodiments of the present application.

[0022] The embodiments of the present application provide a plywood temperature control method, as shown in the method comprises: Figure 1

[0023] Step S100, interact with the target scene, and obtain a product parameter set of the target plywood, wherein the product parameter set includes material thermal physical property parameters and product size parameters.

[0024] Preferably, in the actual production process, the product parameters related to the target plywood are obtained through interactive data acquisition and processing to form a product parameter set, including material thermal physical property parameters and product size parameters. Specifically, the material thermal physical property parameters are mainly related to the raw materials used in the plywood, such as wood, glue, etc., including thermal conductivity (a parameter of the material heat transfer capacity, indicating the heat passing through the material per unit time under a unit temperature gradient, the material with high thermal conductivity can transfer heat faster), specific heat capacity (the heat required to raise the temperature of a material by 1℃ per unit mass, the material with large specific heat capacity can absorb more heat during hot pressing, affecting the solidification reaction speed), thermal expansion coefficient (the ability of the material to change size when the temperature changes, the material with large thermal expansion coefficient may have large deformation during hot pressing), and thermal conductivity coefficient (the heat conduction ability of the material at different temperatures, affecting the temperature distribution in the whole hot pressing process) and the like; the product size parameters are related to the physical size and shape of the plywood, which may include thickness (the thickness of the plywood affects the speed of heat propagation in the material), width and length (related to the effective area of the hot press heating plate and the contact area of the plywood), and plate shape (the uniformity of heat distribution in the hot pressing process of different shaped plates is also different, which may need to be adjusted by adjusting the hot pressing conditions). Through comprehensive analysis of these parameters, the optimal hot pressing conditions of the plywood can be more accurately determined, so as to optimize the production process and improve the quality and stability of the final product.​

[0025] In step S200, the thermal compression deformation is analyzed according to the product size parameters, the compression correction of the material thermal physical parameters is performed, and the corrected thermal physical parameters are obtained.

[0026] Preferably, based on the size parameters (such as thickness, width, length, etc.) of the plywood, the deformation that may occur during hot pressing is analyzed, and the thermal physical parameters of the material are adjusted or corrected accordingly to obtain the corrected thermal physical parameters, so as to more truly reflect the heat transfer characteristics and thermal expansion behavior of the material under actual production conditions. Specifically, the thermal compression deformation refers to the shape change (such as thickness compression, surface deformation, etc.) of the plywood due to the action of high temperature and pressure during hot pressing, which affects the distribution and conduction of heat in the plywood and in turn affects the uniformity of the curing reaction. Through the product size parameters (such as thickness, width, length) and the working conditions of the hot press (such as pressure, time, temperature), the deformation of the plywood during hot pressing can be predicted. Then, the compression correction of the material thermal physical parameters is performed, that is, the thermal physical parameters of the raw material are adjusted according to the actual thermal compression deformation degree. Specifically, due to the deformation of the plywood during hot pressing, the thermal physical parameters (such as thermal conductivity, specific heat capacity, etc.) of the material will be different under different compression states. For example, when the thickness of the plywood is compressed during hot pressing, the thermal conductivity may change, affecting the efficiency of heat transfer. Through the analysis of the deformation during hot pressing, the thermal physical parameters can be corrected according to the compressed thickness, density, etc. to obtain new and more accurate thermal physical parameters. For example, if the thickness of the plywood decreases during hot pressing, the density may increase, and the specific heat capacity and thermal conductivity are adjusted accordingly to more accurately predict the heat transfer and temperature distribution during hot pressing. After deformation and compression correction, the corrected thermal physical parameters are finally obtained, which can more accurately describe the thermal behavior of the plywood during hot pressing, ensure the temperature distribution and curing process of the plywood during production more uniform, and thus improve the quality and stability of the final product.

[0027] Further, step S200 further includes step S210 of obtaining the finished product size parameters and semi-finished product size parameters in the product size parameters and calculating the size difference information before and after hot pressing; step S220 of calculating the material thermal physical parameter change amount during hot pressing based on the size difference information and the material thermal physical parameters through the compression correction model constructed based on regression analysis; and step S230 of applying the material thermal physical parameter change amount to the material thermal physical parameters to obtain the corrected thermal physical parameters.

[0028] Preferably, by calculating the size difference information, combined with the correction of the thermal physical parameters of the plywood material, the changes of material properties and deformation in the hot pressing process are accurately reflected, so as to better control the quality and effect in the production process. Specifically, the size parameters of the finished product (the size of the final product after hot pressing of the plywood) and the size parameters of the semi-finished product (the initial size of the plywood before hot pressing) are obtained. The plywood will be compressed due to the action of temperature and pressure during hot pressing, resulting in a decrease in thickness. The size difference information (i.e. the change in thickness) before and after hot pressing is calculated. The relationship between the size difference (such as thickness difference) before and after hot pressing and the thermal physical parameters (such as thermal conductivity, specific heat capacity, thermal expansion coefficient, etc.) is analyzed by using a regression model to construct a compression correction model for calculating the change amount of the thermal physical parameters of the plywood during hot pressing, i.e. according to the size difference information and the thermal physical parameters of the material, the change amount of the thermal physical parameters of the material during hot pressing is calculated to ensure the uniformity of temperature transfer and solidification process during hot pressing. Finally, the change amount of the thermal physical parameters of the material is applied to the thermal physical parameters of the material, i.e. the change amount of the thermal conductivity, specific heat capacity, etc. calculated is added to the initial thermal physical parameters of the material to obtain the corrected thermal physical parameters, which can more accurately reflect the real heat transfer performance of the material during hot pressing and ensure that the temperature distribution and solidification effect of the plywood during hot pressing can be more accurately predicted.

[0029] Step S300, combined with the corrected thermal physical parameters, the product size parameters and the material thermal physical parameters, a double-mode equivalent hot pressing heat transfer model is constructed.

[0030] Preferably, according to the modified material thermal physical parameters (thermal physical parameters obtained by modifying the actual size change, deformation and correction of the plywood), product size parameters (size and shape of the plywood, etc.) and original material thermal physical parameters (basic parameters of the thermal performance of the raw materials of the plywood, such as thermal conductivity, specific heat capacity and thermal expansion coefficient, etc.), a double-mode equivalent hot pressing heat transfer model is constructed, i.e. the conduction process of heat in the plywood is accurately described by mathematical formula or numerical simulation, wherein the double-mode equivalent hot pressing heat transfer model is used to describe the heat transfer behavior of the plywood in the hot pressing process (heat transfer from the heating plate of the hot pressing machine to the interior of the plywood), specifically, the double-mode equivalent hot pressing heat transfer model considers the heat source (such as the temperature of the heating plate), the thermal physical parameters of the plywood (including the modified material thermal physical parameters) and the size parameters of the plywood, simulates the temperature change of different parts of the plywood in the hot pressing process, ensures that the plywood is uniformly heated in the whole hot pressing process, avoids the problems of internal stress and warping, etc., and at the same time considers the change of the thermal physical parameters (such as thermal conductivity) caused by the deformation of the plywood and adjusts the heat transfer calculation to reflect the actual situation; wherein double mode means that the model combines two different heat conduction modes to analyze the heat transfer process, one is the conventional way of heat transfer, such as heat flow diffusion in the process of heat conduction; the other is the heat transfer related to the deformation of the plywood, such as the change of thermal conductivity caused by deformation; equivalent means that through the construction of the model, the complex heat transfer process can be converted into an equivalent and convenient form for calculation in a certain simplified way, thereby reducing the calculation complexity. A precise heat transfer analysis tool is provided for the hot pressing process, which can predict and optimize the hot pressing conditions (temperature, time, etc.) according to the product size and material properties of the plywood, i.e. the heat conduction behavior of the plywood can be dynamically simulated in the hot pressing process, so as to formulate the best hot pressing strategy in the actual production process, accurately control the temperature distribution and curing effect, avoid the influence of too high or too low temperature on the quality of the plywood, and thus improve the efficiency of the production process and the quality of the plywood.

[0031] Further, step S300 further comprises step S310 of analyzing and determining the most unfavorable heat transfer section and the most favorable heat transfer section of the target plywood, and defining the most unfavorable heat transfer section and the most favorable heat transfer section as the model reference surface; step S320 of constructing a first equivalent hot pressing heat transfer model by taking the material thermal physical parameters as the most favorable parameters, combining the semi-finished product size information and the model reference surface; step S330 of constructing a second equivalent hot pressing heat transfer model by taking the modified thermal physical parameters as the most unfavorable parameters, combining the finished product size parameters and the model reference surface; and step S340, wherein the first equivalent hot pressing heat transfer model and the second equivalent hot pressing heat transfer model both comprise a pair of two-dimensional heat transfer models based on the most unfavorable heat transfer section and the most favorable heat transfer section.

[0032] Preferably, by analyzing the heat transfer characteristics of the plywood, the most suitable and the least suitable cross section for heat transfer is selected as the reference, and then the heat transfer model in the hot pressing process is constructed. Specifically, the most favorable heat transfer cross section refers to the plywood cross section in the hot pressing process, in which heat can be uniformly and efficiently conducted. Usually, the temperature distribution is relatively uniform, the heat diffusion is relatively rapid, and the heat transfer effect is good. The least favorable heat transfer cross section is the cross section in which heat transfer is not smooth in the hot pressing process. Usually, the heat transfer is greatly affected by the material structure or temperature gradient, resulting in slow heat transfer speed, and the hot pressing process may have problems of local high or low temperature. The most favorable heat transfer cross section and the least favorable heat transfer cross section are defined as the reference surface of the model, indicating that all heat conduction simulations and calculations will be based on these two cross sections, i.e. a two-dimensional model of the heat transfer process is constructed from these two cross sections to analyze the heat transfer efficiency in different areas. Among them, the first equivalent hot pressing heat transfer model and the second equivalent hot pressing heat transfer model each include a pair of two-dimensional heat transfer models based on the least favorable heat transfer cross section and the most favorable heat transfer cross section. From the optimal and worst angles, respectively simulate how heat is distributed in the plywood, and help optimize the temperature and time distribution in the hot pressing process.

[0033] Preferably, the first equivalent hot pressing heat transfer model is constructed based on the most favorable thermal property parameter of the material, combined with the size information of the semi-finished product and the most favorable heat transfer cross section and the least favorable heat transfer cross section. That is, based on the most favorable thermal property parameter, the heat transfer process is simulated to predict how heat spreads and transfers from the most favorable heat transfer cross section and the least favorable heat transfer cross section. This model assumes that the heat transfer characteristics of the material in the hot pressing process are in the best state, i.e. the heat transfer capacity of the material is strong. The second equivalent hot pressing heat transfer model is constructed based on the least favorable parameter of the corrected thermal property parameter, combined with the size parameter of the finished product and the model reference surface. That is, based on the most favorable heat transfer cross section and the least favorable heat transfer cross section, the heat transfer is analyzed. Since the thermal property parameter of the material may change during the hot pressing process, this model considers the actual reduction of the heat transfer capacity of the material and predicts possible hot pressing problems to ensure accurate simulation of heat transfer under different conditions, thereby optimizing the temperature control and time distribution of the hot pressing process and improving product quality.

[0034] Step S400, based on the material thermal property parameter, determine the optimal curing condition and the limit temperature resistance constraint, and combine the double-mode equivalent hot pressing heat transfer model for hot pressing simulation to obtain the first hot pressing temperature and the second hot pressing temperature.

[0035] Preferably, by analyzing the thermal properties of the plywood material, combined with the double-mode equivalent hot pressing heat transfer model for hot pressing simulation, the appropriate hot pressing conditions (first hot pressing temperature and second hot pressing temperature) are determined to ensure the curing effect and quality of the plywood, while avoiding material damage or quality problems during the hot pressing process. Specifically, the analysis of material thermal physical parameters determines the curing rate of glue and the thermal expansion characteristics of material at a specific temperature through experimental data or simulation calculation, and then the optimal curing conditions and temperature limit constraints are formulated. The optimal curing conditions refer to the optimal hot pressing conditions that can make the glue in the plywood fully cured without adverse effects (such as warping, cracking, etc.) under certain temperature and time conditions, which may include optimal hot pressing temperature, optimal hot pressing time, etc. During hot pressing, the thermal physical parameters of the plywood or its material will change with the change of temperature, but the temperature limit of the material is limited. Setting the upper limit of temperature prevents high temperature that may cause damage to the material (such as deformation, glue decomposition, wood structure damage, etc.),

[0036] Preferably, the double-mode equivalent hot pressing heat transfer model combines material thermal physical parameters and product size parameters to analyze how heat is transferred from the heating plate to the plywood and how it affects the temperature and deformation inside the plywood. By simulating the thermal behavior of the plywood under different conditions, especially when the temperature changes, how to optimize the hot pressing process is predicted, and then the first hot pressing temperature and the second hot pressing temperature are calculated. Specifically, the first hot pressing temperature is usually the hot pressing temperature at which the plywood starts to deform, which is generally low, mainly to avoid damage to the plywood caused by high temperature at the initial stage of hot pressing, or to promote the initial curing of the glue, which helps to gradually and uniformly heat the entire plywood and avoid local overheating. The second hot pressing temperature usually refers to the temperature at the later stage of hot pressing, which is usually high, in order to ensure complete curing of the glue and improve the performance and stability of the plywood. The temperature at this stage needs to be strictly controlled within the temperature resistance range of the material to avoid material damage. The core purpose of hot pressing simulation is to ensure uniform temperature and appropriate pressure of the plywood during the entire hot pressing process through accurate temperature and time control, so that the glue is cured under suitable conditions and the quality of the product is guaranteed.

[0037] Further, step S400 further comprises step S410 of determining the optimal curing temperature of the glue and the corresponding optimal curing duration as the optimal curing condition; step S420 of obtaining the temperature tolerance limit of the glue and the temperature tolerance limit of the plywood substrate, and taking the lower one as the limit temperature tolerance constraint; step S430 of obtaining the preset hot-pressing rhythm of the target scenario, combining the limit temperature tolerance constraint and the optimal curing condition, and performing model initialization configuration of the first equivalent hot-pressing heat transfer model and the second equivalent hot-pressing heat transfer model; step S440 of respectively performing iterative hot-pressing simulation through the first equivalent hot-pressing heat transfer model and the second equivalent hot-pressing heat transfer model after model initialization configuration; wherein, the two-dimensional heat transfer model based on the least favorable heat transfer section is used to determine the minimum hot-pressing temperature that meets the optimal curing condition; the two-dimensional heat transfer model based on the most favorable heat transfer section is used to verify that the minimum hot-pressing temperature meets the limit temperature tolerance constraint; step S450 of determining whether the minimum hot-pressing temperature makes the central interface of the two-dimensional heat transfer model based on the least favorable heat transfer section reach the optimal curing condition within the preset hot-pressing rhythm, and the interface temperature of the central interface of the two-dimensional heat transfer model based on the most favorable heat transfer section meets the limit temperature tolerance constraint; step S460 of correspondingly outputting the minimum hot-pressing temperature of the first equivalent hot-pressing heat transfer model as the first hot-pressing temperature, and correspondingly outputting the minimum hot-pressing temperature of the second equivalent hot-pressing heat transfer model as the second hot-pressing temperature.

[0038] Preferably, the optimal curing condition refers to the temperature and time at which the glue can completely and uniformly cure during hot pressing, including the optimal curing temperature of the glue and the corresponding optimal curing duration, wherein the optimal curing temperature is usually the temperature at which the glue can most effectively complete the curing reaction without excessive degradation or excessive curing, and the optimal curing duration refers to the time for which the glue needs to be kept at this temperature to ensure complete curing of the glue and achieve the required mechanical properties; the temperature tolerance limit of the glue (the highest temperature that the glue can withstand) and the temperature tolerance limit of the plywood substrate (the highest temperature that the plywood such as wood, fiberboard, etc. can withstand) are obtained, and the lower temperature tolerance limit of the glue and the substrate is taken as the final limit temperature tolerance constraint to ensure safety and product quality during hot pressing.

[0039] Preferably, the preset hot pressing rhythm of the target scene is obtained, that is, the time required for the plywood to start hot pressing to end hot pressing is defined, the length of each hot pressing period is controlled, and before the hot pressing simulation, the first equivalent hot pressing heat transfer model and the second equivalent hot pressing heat transfer model are initialized and configured according to the optimal curing condition and the extreme temperature resistance constraint, including determining the initial conditions of the equivalent hot pressing heat transfer model, such as hot pressing temperature, time and material parameters, and then performing iterative hot pressing simulation, specifically including taking the upper limit of hot spot temperature as a constraint, taking the center interface temperature (the optimal curing temperature of glue) as a boundary condition (the hysteresis of heat conduction can be considered, that is, after stopping hot pressing, the temperature at the center interface of the plywood will remain or even rise for a period of time), simulating to obtain the minimum hot pressing temperature that makes the center interface temperature reach the optimal curing temperature of the glue within the preset time and meets the curing time, and at the same time, the upper limit of hot spot temperature is used to avoid high temperature leading to carbonization of wood or decomposition of glue, wherein the two-dimensional heat transfer model based on the most unfavorable heat transfer section is used to determine the minimum hot pressing temperature that meets the optimal curing condition; the two-dimensional heat transfer model based on the most favorable heat transfer section is used to verify that the minimum hot pressing temperature meets the extreme temperature resistance constraint.

[0040] Preferably, if the minimum hot pressing temperature (obtained by the two-dimensional heat transfer model based on the most unfavorable heat transfer section) can ensure that the center interface of the plywood reaches the optimal curing condition within the preset hot pressing rhythm, and the temperature simulated by the two-dimensional heat transfer model based on the most favorable heat transfer section does not exceed the extreme temperature resistance constraint, it is considered that the temperature is suitable, and the minimum hot pressing temperature calculated in the first equivalent hot pressing heat transfer model is output as the first hot pressing temperature, and the minimum hot pressing temperature calculated in the second equivalent hot pressing heat transfer model is output as the second hot pressing temperature, which is used for adjusting the temperature in actual operation. The first equivalent hot pressing heat transfer model focuses on the temperature distribution under the most favorable condition, and the second equivalent hot pressing heat transfer model emphasizes the temperature control under the most unfavorable condition. After outputting the first hot pressing temperature and the second hot pressing temperature, the temperature and time setting in the production process will be more accurate, ensuring that the hot pressing process can achieve the best curing effect and avoid material damage or quality problems caused by high temperature, thereby optimizing the production process and improving product quality.

[0041] Step S500, according to the preset temperature fusion weight, weighting the first hot pressing temperature and the second hot pressing temperature, obtaining the target hot pressing temperature.

[0042] Preferably, the preset temperature fusion weight is used to adjust and combine the influence degree of the two different temperatures (the first hot pressing temperature and the second hot pressing temperature), which represents the relative importance of various factors on the selection of the hot pressing temperature in actual production, and is usually set based on the simulation experiment results. For example, if the temperature of the most favorable heat transfer section (the first hot pressing temperature) is more important under certain production conditions, it may be because the heat conduction in this area is more uniform and the glue curing is more efficient, so a higher weight is given to the first hot pressing temperature. If the temperature of the least favorable heat transfer section (the second hot pressing temperature) is more important under other conditions, it may be because this area is heated slowly and is prone to uneven curing, which may need to be compensated by a higher temperature, so a higher weight is given to the second hot pressing temperature. By weighting the first hot pressing temperature and the second hot pressing temperature using the temperature fusion weight, the target hot pressing temperature is obtained, which can better balance the temperature requirements of different areas, so that the plywood does not appear to be damaged due to excessive temperature in some areas during the whole hot pressing process, nor does it appear to be not completely cured due to insufficient temperature in some areas, thereby ensuring that the hot pressing process meets the plywood curing requirements under different conditions, ensuring accurate temperature control during the hot pressing process, and thereby improving the quality and stability of the product.

[0043] In step S600, the target hot pressing temperature is returned to the dual-mode equivalent hot pressing heat transfer model for hot pressing verification, and the first hot pressing time and the second hot pressing time are obtained, and the average is calculated as the target hot pressing time.

[0044] Preferably, the target hot pressing temperature is input into the dual-mode equivalent hot pressing heat transfer model for hot pressing verification. Specifically, the dual-mode equivalent hot pressing heat transfer model is used to actually run the target hot pressing temperature, simulate and predict the temperature change, heat transfer and glue curing effect in each stage of the hot pressing process, and then evaluate the effect of the target hot pressing temperature in the actual hot pressing process, so as to ensure that the temperature can cover the entire plywood within a predetermined time and reach the optimal curing condition, while meeting all the hot pressing beats and temperature resistance constraints. Two hot pressing times, including the first hot pressing time and the second hot pressing time, are calculated, which reflect the required hot pressing time under different heat transfer conditions. The first hot pressing time is based on the heat transfer simulation of the most favorable heat transfer section, and the optimal hot pressing time under the target hot pressing temperature is determined, that is, the time that ensures the glue is completely cured in this area and will not be over-cured. The second hot pressing time is based on the heat transfer simulation of the least favorable heat transfer section, and the time required for the least favorable area (such as the area with slow heat transfer or uneven temperature distribution) to reach the glue curing under the target hot pressing temperature is determined. Finally, the first hot pressing time and the second hot pressing time are weighted and averaged to obtain the target hot pressing time, which can ensure that the glue is uniformly cured on the entire plywood during the hot pressing process, and the time of the hot pressing process is accurately controlled, thereby ensuring the stability and consistency of product quality.

[0045] Step S700, if the target hot pressing time length meets the preset hot pressing rhythm, then based on the target hot pressing time length and the target hot pressing temperature, hot pressing control is performed.

[0046] Preferably, if the target hot pressing time length meets the preset hot pressing rhythm, it means that the time required for the hot pressing process is within a reasonable range, and the production requirements can be met smoothly, that is, the duration of the hot pressing process is consistent with the production rhythm, which can meet the periodic requirements of the production line. According to the target hot pressing temperature and the target hot pressing time length, the temperature and time setting of the hot press are adjusted to ensure that the plywood can meet the predetermined quality requirements during the hot pressing process. Specifically, it includes adjusting the temperature of the heating plate to ensure that the heating surface temperature meets the target hot pressing temperature; controlling the working time of the hot press to ensure that the duration of the hot pressing process meets the target hot pressing time length, ensuring that the glue can be fully cured; dynamically adjusting according to the real-time feedback of the temperature during the hot pressing process to ensure that the temperature and time length of each hot pressing cycle meet the production requirements; further ensuring that the production process is carried out according to the predetermined time and temperature, and ensuring that the hot pressing process of each batch of plywood can achieve the best curing effect, and the product quality and production efficiency will not be affected by the error of time or temperature.

[0047] Further, step S700 further includes step S710, if the target hot pressing time length does not meet the preset hot pressing rhythm, then the target hot pressing temperature is stepwise adjusted; step S720, based on the target hot pressing temperature after stepwise adjustment, combined with the double-mode equivalent hot pressing heat transfer model, iterative hot pressing verification is performed to obtain the iterative hot pressing time length; step S730, if the iterative hot pressing time length meets the preset hot pressing rhythm in the iteration, then the iterative hot pressing time length and the corresponding target hot pressing temperature after stepwise adjustment are used for hot pressing control.

[0048] Preferably, if the target hot pressing duration does not meet the preset hot pressing tempo, indicating that the curing time of the plywood is too long or too short, resulting in the hot pressing cycle cannot be completed smoothly, it is necessary to step adjust the hot pressing temperature, that is, to gradually fine-tune the target hot pressing temperature, including increasing or decreasing the temperature, changing the heat transfer rate during hot pressing, thereby changing the hot pressing duration, to ensure that it meets the tempo requirements of the production line; then input the step-adjusted target hot pressing temperature into the double-mode equivalent hot pressing heat transfer model for hot pressing verification, including simulating according to the new temperature, checking the temperature distribution, heat transfer efficiency and glue curing effect during hot pressing, and iteratively verifying the hot pressing by repeatedly calculating to continuously adjust and optimize the matching of temperature and time, to ensure that under the new hot pressing temperature, the plywood can complete curing and the time meets the preset requirements, and then obtain the iterative hot pressing duration (hot pressing duration), which reflects the time required for the plywood to reach the best curing condition under the new target hot pressing temperature. If the iterative hot pressing duration meets the preset hot pressing tempo, and the step-adjusted target hot pressing temperature can ensure that the plywood reaches the best curing effect, the temperature and time settings of the hot press will be configured according to the final adjusted target hot pressing temperature and the iterative hot pressing duration, to ensure that in actual production, the hot pressing process can not only guarantee product quality (such as complete curing of glue), but also meet the production cycle requirements, thereby being able to improve production efficiency while ensuring quality.

[0049] Further, step S730 further includes step S731, if in the iteration, the target hot pressing temperature after the Nth step adjustment is greater than the limit temperature resistance constraint, and the corresponding iterative hot pressing duration still does not meet the preset hot pressing tempo; step S732, output the target hot pressing temperature after the N-1th step adjustment and the corresponding iterative hot pressing duration after the N-1th step adjustment as the limit hot pressing parameters; step S733, generate a tight tempo warning, and transmit the tight tempo warning and the limit hot pressing parameters to the user management interface.

[0050] Preferably, if the target hot-pressing temperature adjusted by the Nth step exceeds the limit temperature resistance constraint during the iteration process, it indicates that the current temperature has exceeded the temperature resistance range of the material, and the hot-pressing cannot continue to use the temperature, even after the step adjustment, the iteration hot-pressing time (the actual hot-pressing time calculated based on the target hot-pressing temperature and the heat transfer model) still cannot complete the hot-pressing process within the predetermined production cycle, which means that the time required for the hot-pressing process exceeds the standard time (preset hot-pressing beat) of the production line, resulting in a lag in the production rhythm, wherein N is a positive integer, representing one of the multiple iterations; the target hot-pressing temperature adjusted by the N-1th step and the iteration hot-pressing time adjusted by the N-1th step are used as the limit hot-pressing parameters, indicating the optimal hot-pressing settings under the current condition without violating the temperature resistance limit; when the time of the hot-pressing process (iteration hot-pressing time) cannot meet the preset hot-pressing beat, the production plan will face the risk of not being completed on time, a tight beat warning is generated and transmitted to the user management interface, prompting the management personnel that the current production beat is too tight, which may cause the production line to fail to complete the task within the specified time, which helps to adjust the production parameters in time, avoiding production delay and product quality problems.

[0051] Further, step S700 further comprises steps S740 of defining a plurality of temperature collection points and collecting hot-pressing monitoring data in real time; and step S750 of analyzing and determining whether the hot-pressing monitoring data meets the limit temperature resistance constraint and the best curing condition, and if not, performing feedback correction of the temperature fusion weight.

[0052] Preferably, defining multiple temperature collection points refers to arranging multiple temperature measurement sensors or monitoring devices in the hot press for real-time monitoring of the temperature of the plywood in different areas. Different temperature points are usually arranged at positions such as the surface, center, and area close to the heating plate of the hot press of the plywood. These temperature collection points are used to monitor and obtain the temperature of the plywood in different areas in real time, ensuring uniform heat distribution and avoiding local overheating or excessively low temperature. According to the real-time collected temperature data, it is determined whether the temperature of each collection point meets the limit temperature resistance constraint and the optimal curing condition. If the temperature of some areas exceeds the limit temperature resistance constraint, it indicates that the plywood or glue may be damaged. If the temperature does not reach the optimal curing condition, it indicates that the glue may not be fully cured, affecting the performance and quality of the product. If the collected temperature data does not meet the limit temperature resistance constraint and the optimal curing condition, feedback correction of the temperature fusion weight is performed, that is, the temperature fusion weight is adjusted according to the real-time monitoring data. Specifically, if the temperature of some areas exceeds the limit temperature resistance constraint or does not reach the optimal curing condition, the temperature fusion weight is automatically adjusted and corrected, that is, the temperature weighting proportion between the most favorable and the least favorable heat transfer cross section is adjusted, and the temperature of some areas is increased or decreased. For example, if the temperature of some areas exceeds the limit temperature resistance constraint during the hot pressing process, the temperature weighting weight of this area is reduced to reduce the temperature, so as to ensure that the temperature does not exceed the temperature resistance range. If the temperature of some areas does not reach the optimal curing condition during the hot pressing process, the temperature weighting weight of this area is increased to ensure that the temperature meets the curing requirement. This ensures that the temperature can be more accurately controlled during the production process, avoids the adverse effects of excessively high or low temperature on the quality of the plywood, and thus ensures the high quality and production efficiency of the product.

[0053] In the foregoing, with reference to Figure 1 A plywood temperature control method according to an embodiment of the present application is described in detail. Next, with reference to Figure 2 A plywood temperature control system according to an embodiment of the present application will be described.

[0054] The plywood temperature control system according to the embodiment of the present application is used to solve the technical problem that the hot pressing process of different products cannot be accurately controlled in the prior art, resulting in inaccurate temperature control, unstable hot pressing process, low production efficiency of plywood, and poor product quality. As shown in Figure 2 A plywood temperature control system includes a product parameter set acquisition module 10, a corrected thermal physical property parameter acquisition module 20, a double-mode equivalent hot pressing heat transfer model construction module 30, a hot pressing temperature acquisition module 40, a target hot pressing temperature acquisition module 50, a target hot pressing time calculation module 60, and a hot pressing control module 70.

[0055] The product parameter set acquisition module 10 is configured to interact with a target scene to acquire a product parameter set of a target plywood, wherein the product parameter set includes material thermal physical property parameters and product size parameters; the corrected thermal physical property parameter acquisition module 20 is configured to analyze thermal compression deformation according to the product size parameters, perform compression correction on the material thermal physical property parameters, and acquire corrected thermal physical property parameters; the dual-mode equivalent hot-pressing heat transfer model construction module 30 is configured to construct a dual-mode equivalent hot-pressing heat transfer model in combination with the corrected thermal physical property parameters, the product size parameters, and the material thermal physical property parameters; the hot-pressing temperature acquisition module 40 is configured to determine optimal solidification conditions and a limit temperature resistance constraint based on the material thermal physical property parameters, and perform hot-pressing simulation in combination with the dual-mode equivalent hot-pressing heat transfer model to acquire a first hot-pressing temperature and a second hot-pressing temperature; the target hot-pressing temperature acquisition module 50 is configured to acquire a target hot-pressing temperature by weighting the first hot-pressing temperature and the second hot-pressing temperature according to a preset temperature fusion weight; the target hot-pressing time length calculation module 60 is configured to return the target hot-pressing temperature to the dual-mode equivalent hot-pressing heat transfer model for hot-pressing verification to acquire a first hot-pressing time length and a second hot-pressing time length, and calculate a mean value as a target hot-pressing time length; and the hot-pressing control module 70 is configured to perform hot-pressing control based on the target hot-pressing time length and the target hot-pressing temperature if the target hot-pressing time length meets a preset hot-pressing rhythm.

[0056] Next, the specific configuration of the corrected thermal physical property parameter acquisition module 20 will be described in detail. The corrected thermal physical property parameter acquisition module 20 further includes: acquiring finished product size parameters and semi-finished product size parameters in the product size parameters, and calculating size difference information before and after hot pressing; calculating a material thermal physical property parameter change amount in a hot pressing process according to the size difference information and the material thermal physical property parameters through a compression correction model constructed based on regression analysis; and applying the material thermal physical property parameter change amount to the material thermal physical property parameters to acquire corrected thermal physical property parameters.

[0057] Next, the specific configuration of the dual-mode equivalent hot-pressing heat transfer model construction module 30 will be described in detail. The dual-mode equivalent hot-pressing heat transfer model construction module 30 further includes: analyzing and determining a most unfavorable heat transfer section and a most favorable heat transfer section of the target plywood, and defining the most unfavorable heat transfer section and the most favorable heat transfer section as model reference surfaces; constructing a first equivalent hot-pressing heat transfer model in combination with semi-finished product size information and the model reference surfaces by taking the material thermal physical property parameters as the most favorable parameters; constructing a second equivalent hot-pressing heat transfer model in combination with the finished product size parameters and the model reference surfaces by taking the corrected thermal physical property parameters as the most unfavorable parameters; and wherein the first equivalent hot-pressing heat transfer model and the second equivalent hot-pressing heat transfer model each include a pair of two-dimensional heat transfer models based on the most unfavorable heat transfer section and the most favorable heat transfer section.

[0058] The specific configuration of the hot-press temperature acquisition module 40 will be described in detail below. The hot-press temperature acquisition module 40 further comprises: determining the optimal curing temperature of the glue and the corresponding optimal curing time as the optimal curing condition; acquiring the temperature resistance limit of the glue and the temperature resistance limit of the plywood substrate, and taking the lower one as the limit temperature resistance constraint; combining the limit temperature resistance constraint and the optimal curing condition, the model initialization configuration of the first equivalent hot-press heat transfer model and the second equivalent hot-press heat transfer model is carried out based on the preset hot-press beat of the target scene; the first equivalent hot-press heat transfer model and the second equivalent hot-press heat transfer model after model initialization configuration are respectively used for iterative hot-press simulation; wherein, the two-dimensional heat transfer model based on the most unfavorable heat transfer section is used to determine the minimum hot-press temperature that meets the optimal curing condition; the two-dimensional heat transfer model based on the most favorable heat transfer section is used to verify that the minimum hot-press temperature meets the limit temperature resistance constraint; if the minimum hot-press temperature makes the central interface based on the two-dimensional heat transfer model of the most unfavorable heat transfer section reach the optimal curing condition within the preset hot-press beat, and the interface temperature of the central interface based on the two-dimensional heat transfer model of the most favorable heat transfer section meets the limit temperature resistance constraint; the first hot-press temperature corresponding to the minimum hot-press temperature output by the first equivalent hot-press heat transfer model, and the second hot-press temperature corresponding to the minimum hot-press temperature output by the second equivalent hot-press heat transfer model.

[0059] The specific configuration of the hot-press control module 70 will be described in detail below. The hot-press control module 70 further comprises: if the target hot-press time does not meet the preset hot-press beat, the target hot-press temperature is adjusted step by step; based on the target hot-press temperature after step adjustment, the iterative hot-press verification is carried out combining the double-mode equivalent hot-press heat transfer model to acquire the iterative hot-press time; if the iterative hot-press time meets the preset hot-press beat exists in the iteration, the hot-press control is carried out with the iterative hot-press time and the target hot-press temperature after corresponding step adjustment.

[0060] The specific configuration of the hot-press control module 70 will be described in detail below. The hot-press control module 70 further comprises: if in the iteration, the target hot-press temperature after the Nth step adjustment is greater than the limit temperature resistance constraint, and the corresponding iterative hot-press time still does not meet the preset hot-press beat; output the target hot-press temperature after the N-1th step adjustment and the corresponding iterative hot-press time after the N-1th step adjustment as the limit hot-press parameter; generate a tight beat warning, and transmit the tight beat warning and the limit hot-press parameter to the user management interface.

[0061] Next, the specific configuration of the hot-pressing control module 70 will be described in detail. The hot-pressing control module 70 further comprises: defining a plurality of temperature collection points, and collecting hot-pressing monitoring data in real time; analyzing and determining whether the hot-pressing monitoring data meets the limit temperature resistance constraint and the optimal curing condition, and if not, performing feedback correction of the temperature fusion weight.

[0062] The plywood temperature control system provided by the embodiments of the present application can execute the plywood temperature control method provided by any of the embodiments of the present application, and has the corresponding function modules and beneficial effects of the execution method.

[0063] Based on the foregoing embodiments, the embodiments of the present application further provide a computer readable storage medium, which stores a computer program. When the computer program is executed by a processor, the computer program can implement the plywood temperature control method according to any of the foregoing embodiments.

[0064] Although the present application makes various references to certain modules in the system according to the embodiments of the present application, however, any number of different modules can be used and run on the user terminal and / or the server, and the various units and modules are only divided according to the functional logic, but are not limited to the above division, as long as the corresponding functions can be implemented; in addition, the specific names of the functional units are only for easy mutual differentiation, and do not limit the protection scope of the present application.

[0065] The specific embodiments described above do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method of temperature control of a plywood, characterized by, The method comprises: An interactive target scene is obtained, and a product parameter set of a target plywood is obtained, wherein the product parameter set comprises material thermal physical property parameters and product size parameters; According to the product size parameters, hot-press deformation is analyzed, compression correction of the material thermal physical property parameters is performed, and corrected thermal physical property parameters are obtained; A double-mode equivalent hot-press heat transfer model is constructed in combination with the corrected thermal physical property parameters, the product size parameters, and the material thermal physical property parameters; Based on the material thermal physical property parameters, optimal curing conditions and a limit temperature resistance constraint are determined, and hot-press simulation is performed in combination with the double-mode equivalent hot-press heat transfer model to obtain a first hot-press temperature and a second hot-press temperature; According to a preset temperature fusion weight, the first hot-press temperature and the second hot-press temperature are weighted to obtain a target hot-press temperature; The target hot-press temperature is returned to the double-mode equivalent hot-press heat transfer model for hot-press verification to obtain a first hot-press time length and a second hot-press time length, and an average value is calculated as a target hot-press time length; If the target hot-press time length meets a preset hot-press rhythm, hot-press control is performed based on the target hot-press time length and the target hot-press temperature.

2. A method of temperature control of a plywood board as claimed in claim 1, wherein, According to the product size parameters, hot-press deformation is analyzed, compression correction of the material thermal physical property parameters is performed, and corrected thermal physical property parameters are obtained, comprising: The finished product size parameters and the semi-finished product size parameters in the product size parameters are obtained, and size difference information before and after hot-pressing is calculated; Through a compression correction model constructed based on regression analysis, a material thermal physical property parameter change amount in a hot-pressing process is calculated according to the size difference information and the material thermal physical property parameters; The material thermal physical property parameter change amount is applied to the material thermal physical property parameters to obtain corrected thermal physical property parameters.

3. A method of temperature control of a plywood board as claimed in claim 2, wherein, In combination with the corrected thermal physical property parameters, the product size parameters, and the material thermal physical property parameters, a double-mode equivalent hot-press heat transfer model is constructed, comprising: The most unfavorable heat transfer section and the most favorable heat transfer section of the target plywood are analyzed and determined, and the most unfavorable heat transfer section and the most favorable heat transfer section are defined as model reference surfaces; The first equivalent hot-press heat transfer model is constructed in combination with the semi-finished product size information and the model reference surfaces, taking the material thermal physical property parameters as the most favorable parameters; The second equivalent hot-press heat transfer model is constructed in combination with the finished product size parameters and the model reference surfaces, taking the corrected thermal physical property parameters as the most unfavorable parameters; The first equivalent hot-press heat transfer model and the second equivalent hot-press heat transfer model both comprise a pair of two-dimensional heat transfer models based on the most unfavorable heat transfer section and the most favorable heat transfer section.

4. A method of temperature control of a plywood board as claimed in claim 3, wherein, Based on the material thermal physical property parameters, optimal curing conditions and a limit temperature resistance constraint are determined, and hot-press simulation is performed in combination with the double-mode equivalent hot-press heat transfer model to obtain a first hot-press temperature and a second hot-press temperature, comprising: The optimal curing temperature of the glue and the corresponding optimal curing time length are determined as the optimal curing conditions; The temperature limit of the glue and the temperature limit of the plywood substrate are obtained, and the lower one is taken as the limit temperature resistance constraint; obtaining the preset hot-pressing cycle of the target scene, combining the extreme temperature resistance constraint and the optimal curing condition, and performing model initialization configuration of the first equivalent hot-pressing heat transfer model and the second equivalent hot-pressing heat transfer model; performing iterative hot-pressing simulation through the first equivalent hot-pressing heat transfer model and the second equivalent hot-pressing heat transfer model after model initialization configuration, respectively; wherein, the two-dimensional heat transfer model based on the most unfavorable heat transfer section is used to determine the minimum hot-pressing temperature meeting the optimal curing condition; and the two-dimensional heat transfer model based on the most favorable heat transfer section is used to verify that the minimum hot-pressing temperature meets the extreme temperature resistance constraint; if the minimum hot-pressing temperature makes the central interface of the two-dimensional heat transfer model based on the most unfavorable heat transfer section reach the optimal curing condition within the preset hot-pressing cycle, and the interface temperature of the central interface of the two-dimensional heat transfer model based on the most favorable heat transfer section meets the extreme temperature resistance constraint; correspondingly outputting the minimum hot-pressing temperature of the first equivalent hot-pressing heat transfer model as the first hot-pressing temperature, and the minimum hot-pressing temperature of the second equivalent hot-pressing heat transfer model as the second hot-pressing temperature.

5. A method of temperature control of a plywood board as claimed in claim 1, wherein, The method further comprises: if the target hot-pressing time length does not meet the preset hot-pressing cycle, performing step adjustment on the target hot-pressing temperature; based on the step-adjusted target hot-pressing temperature, combining the double-mode equivalent hot-pressing heat transfer model to perform iterative hot-pressing verification, and obtaining an iterative hot-pressing time length; if the iterative hot-pressing time length meets the preset hot-pressing cycle in the iteration, performing hot-pressing control on the iterative hot-pressing time length and the step-adjusted target hot-pressing temperature corresponding thereto.

6. A method of temperature control of a plywood board as claimed in claim 5, wherein, The method further comprises: if, in the iteration, the target hot-pressing temperature after the Nth step adjustment is greater than the extreme temperature resistance constraint, and the corresponding iterative hot-pressing time length still does not meet the preset hot-pressing cycle; then outputting the target hot-pressing temperature after the (N-1)th step adjustment and the corresponding iterative hot-pressing time length after the (N-1)th step adjustment as the extreme hot-pressing parameters; generating a tight cycle warning, and transmitting the tight cycle warning and the extreme hot-pressing parameters to a user management interface.

7. A method of temperature control of a plywood board as claimed in claim 1, wherein, After performing hot-pressing control based on the target hot-pressing time length and the target hot-pressing temperature, the method further comprises: defining a plurality of temperature collection points, and collecting hot-pressing monitoring data in real time; analyzing and determining whether the hot-pressing monitoring data meets the extreme temperature resistance constraint and the optimal curing condition, and if not, performing feedback correction on the temperature fusion weight.

8. A plywood temperature control system, characterized by, The system is used to implement the plywood temperature control method of any one of claims 1 to 7, and the system comprises: a product parameter set acquisition module configured to interact with a target scene and acquire product parameter sets of a target plywood, wherein the product parameter sets comprise material thermal physical property parameters and product size parameters; a corrected thermal physical property parameter acquisition module configured to analyze hot-pressing deformation according to the product size parameters, perform compression correction on the material thermal physical property parameters, and acquire corrected thermal physical property parameters; a temperature fusion weight acquisition module configured to analyze the corrected thermal physical property parameters, and acquire a temperature fusion weight; The double-mode equivalent hot-press heat transfer model construction module is configured to construct a double-mode equivalent hot-press heat transfer model by combining the corrected thermal physical property parameters, the product size parameters, and the material thermal physical property parameters; The hot-press temperature acquisition module is configured to determine optimal solidification conditions and a limit temperature resistance constraint based on the material thermal physical property parameters, and to acquire a first hot-press temperature and a second hot-press temperature by performing hot-press simulation in combination with the double-mode equivalent hot-press heat transfer model; The target hot-press temperature acquisition module is configured to acquire a target hot-press temperature by weighting the first hot-press temperature and the second hot-press temperature according to a preset temperature fusion weight; The target hot-press time length calculation module is configured to return the target hot-press temperature to the double-mode equivalent hot-press heat transfer model for hot-press verification, to acquire a first hot-press time length and a second hot-press time length, and to calculate a mean value as a target hot-press time length; The hot-press control module is configured to perform hot-press control based on the target hot-press time length and the target hot-press temperature if the target hot-press time length meets a preset hot-press rhythm.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the plywood temperature control method of any one of claims 1-7. The program is executed by the processor to implement the plywood temperature control method of any one of claims 1-7.

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