Multi-sensor fusion fiberboard hot-pressing control method

Abstract

The invention discloses a multi-sensor fusion fiberboard hot-pressing control method, which belongs to the technical field of equipment control, and comprises the following steps of: monitoring the displacement and pressing speed of each layer of hot-pressing upper plate through sensors, and analyzing the time for completing prepressing of each layer of hot-pressing upper plate in real time, so as to adjust the pressing speed of each layer of hot-pressing upper plate during prepressing; the method comprises the following steps: firstly, carrying out normal compression on each layer of plate blank, analyzing predicted time for each layer of plate blank to reach a corresponding target thickness before formal compression, obtaining an intermediate value from the predicted time as target time, adjusting preset pressure of each layer according to the target time, so that each layer of plate blank is compressed to the target thickness at the same time, and analyzing predicted pressure maintaining time of each layer of plate blank in a pressure maintaining stage; and an intermediate value is obtained from the preset pressure maintaining time to serve as the target pressure maintaining time, the preset pressure maintaining pressure of each layer is adjusted according to the target pressure maintaining time, pressure maintaining of each layer of plate blanks is completed at the same time, and the quality of hot-pressed finished products is guaranteed while all the layers of plate blanks are completed synchronously at all the stages.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment control, and particularly to a fiberboard hot pressing control method based on multi-sensor fusion. Background Art

[0002] Fiberboard is a kind of artificial board made from wood or other plant fibers as raw materials. After being mechanically processed into fibers, synthetic resin or other suitable adhesives are used to perform hot pressing under heating and pressurization conditions.

[0003] In a fiberboard production line, a multi-layer hot press can simultaneously hot press multiple billets, greatly improving production efficiency. However, in the existing technology, usually after setting fixed parameters, unified hot pressing is carried out. Due to the differences between billets, the required hot pressing parameters may be the same. Therefore, if a qualified fiberboard is to be hot pressed, the unified parameter setting cannot ensure the synchronous hot pressing of each billet, thus reducing production efficiency. And if the same parameters are used for synchronous hot pressing, the quality of the hot pressed finished product may not meet the standard. Therefore, how to automatically adjust the hot pressing parameters to ensure the hot pressing quality while synchronously hot pressing is an urgent problem to be solved. Summary of the Invention

[0004] In order to solve the technical problems existing in the prior art, the present invention provides a fiberboard hot pressing control method based on multi-sensor fusion, including the following steps: Obtain the billet information of the billets on each layer in the multi-layer hot press, as well as the first pre-pressing distance of the hot pressing upper plate on each layer, where the billet information includes material, initial thickness, and target thickness; Analyze the actual pre-pressing distance of the hot pressing upper plate on each layer according to the first pre-pressing distance; The hot pressing upper plate on each layer performs pre-pressing according to the corresponding actual pre-pressing distance, and monitors the displacement and downward pressing speed of the hot pressing upper plate on each layer through a displacement sensor and a speed sensor; According to the displacement and downward pressing speed of the hot pressing upper plate on each layer, analyze in real time whether the pre-pressing completion time of the hot pressing upper plate on each layer is synchronous. If not, adjust the downward pressing speed of the hot pressing upper plate on each layer; After the pre-pressing is completed, according to the billet information and the preset hot pressing temperature and preset pressure on each layer, analyze the estimated time required for each layer of billet to reach the corresponding target thickness, obtain the intermediate value as the target time, and adjust the preset pressure on each layer according to the target time, so that each layer of billet is simultaneously compressed to the target thickness; After entering the pressure holding stage, according to the billet information and the preset pressure holding temperature and preset pressure holding on each layer, analyze the estimated pressure holding time of each layer of billet, obtain the intermediate value as the target pressure holding time, and adjust the preset pressure holding on each layer according to the target pressure holding time, so that each layer of billet simultaneously completes pressure holding.

[0005] Further, analyze the actual preloading distance of each layer of the hot pressing upper plate according to the first preloading distance: ; Among them, represents the actual preloading distance of the nth layer of the hot pressing upper plate, where n represents the layer number of the hot pressing upper plate being analyzed currently, represents the first preloading distance of the ith layer of the hot pressing upper plate, and i is an index symbol. When i = 1, it represents the bottom layer.

[0006] Further, analyze in real time whether the preloading time used by each layer of the hot pressing upper plate is the same. Specifically: ; Among them, represents the preloading time used by the nth layer of the hot pressing upper plate, represents the displacement of the nth layer of the hot pressing upper plate, represents the downward pressure speed of the nth layer of the hot pressing upper plate.

[0007] Further, adjust the downward pressure speed of each layer of the hot pressing upper plate. Specifically, make the adjusted downward pressure speed of each layer of the hot pressing upper plate satisfy: ; Among them, 1, 2....N all represent the layer numbers of the hot pressing upper plate, N represents the topmost hot pressing upper plate, and vt represents the adjusted downward pressure speed.

[0008] Further, analyze the estimated time required for each layer of the slab to reach the corresponding target thickness. Specifically, analyze the estimated time required for each layer of the slab to reach the corresponding target thickness through a pre-trained first deep learning model; Adjust the preset hot pressing temperature and preset pressure of each layer according to the target time. Specifically, through a pre-trained second deep learning model, estimate the pressure required for each layer of the slab to be compressed to the target thickness within the target time according to the slab information and preset hot pressing temperature of each layer.

[0009] Further, analyze the estimated pressure holding time of each layer of the slab. Specifically, analyze the estimated pressure holding time of each layer of the slab through a pre-trained third deep learning model; Adjust the preset pressure holding pressure of each layer according to the target pressure holding time. Specifically, through a pre-trained fourth deep learning model, estimate the pressure holding pressure required for each layer of the slab to complete pressure holding within the target pressure holding time according to the slab information and preset pressure holding temperature of each layer.

[0010] Further, during the pressure holding process of each layer, the real-time temperature of each layer of slab is also obtained in real time through a temperature sensor, and it is judged whether the real-time temperature of each layer of slab is within the corresponding preset temperature range. If not, the pressure holding temperature of the corresponding layer is adjusted to make the real-time temperature of the slab of this layer fall within the corresponding preset temperature range again.

[0011] Further, the adjustment of the pressure holding temperature of the corresponding layer to make the real-time temperature of the slab of this layer fall within the corresponding preset temperature range again is specifically as follows: If the real-time temperature of the slab is lower than the minimum value of the corresponding preset temperature range, increase the lower surface temperature of the upper hot press plate of this layer and increase the upper surface temperature of the lower hot press plate of this layer; If the real-time temperature of the slab is higher than the maximum value of the corresponding preset temperature range, decrease the lower surface temperature of the upper hot press plate of this layer and decrease the upper surface temperature of the lower hot press plate of this layer.

[0012] The present invention also provides a fiberboard hot pressing control system with multi-sensor fusion, including: A data acquisition module, which is used to acquire the slab information of each layer of slab in a multi-layer hot press and the first pre-pressing distance of the upper hot press plate of each layer, and the slab information includes material, initial thickness and target thickness; A first analysis module, which is used to analyze the actual pre-pressing distance of the upper hot press plate of each layer according to the first pre-pressing distance; A displacement sensor, which is used to monitor the displacement of the upper hot press plate of each layer during pre-pressing; A speed sensor, which is used to monitor the downward pressing speed of the upper hot press plate of each layer during pre-pressing; A first adjustment module, which is used to analyze in real time whether the pre-pressing completion times of the upper hot press plates of each layer are synchronized according to the displacement and downward pressing speed of the upper hot press plates of each layer. If they are not synchronized, adjust the downward pressing speed of the upper hot press plates of each layer; A second analysis module, which is used to analyze the estimated time required for each layer of slab to reach the corresponding target thickness according to the slab information, the preset hot pressing temperature and the preset pressure of each layer after pre-pressing is completed, and obtain the intermediate value as the target time; A second adjustment module, which is used to adjust the preset pressure of each layer according to the target time so that each layer of slab is compressed to the target thickness simultaneously; A third analysis module, which is used to analyze the estimated pressure holding time of each layer of slab according to the slab information, the preset pressure holding temperature and the preset pressure holding pressure of each layer after entering the pressure holding stage, and obtain the intermediate value as the target pressure holding time; A third adjustment module, which is used to adjust the preset pressure holding pressure of each layer according to the target pressure holding time so that each layer of slab completes the pressure holding simultaneously.

[0013] The present invention also provides a computer-readable storage medium, in which a computer program is stored. The computer program includes program instructions, and when the program instructions are executed by a processor of an electronic device, the processor is caused to execute the multi-sensor fusion fiberboard hot pressing control method as described in any one of the above.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, the displacement and downward pressing speed of each layer of the hot pressing upper plate are monitored by sensors, and the time for each layer of the hot pressing upper plate to complete pre-pressing is analyzed in real time. Based on this, the downward pressing speed during pre-pressing of each layer of the hot pressing upper plate is adjusted, and the estimated time for each layer of the board blank to reach the corresponding target thickness is analyzed before formal compression. The intermediate value is obtained therefrom as the target time, and the preset pressure of each layer is adjusted according to the target time, so that each layer of the board blank is simultaneously compressed to the target thickness. During the pressure holding stage, the estimated pressure holding time of each layer of the board blank is analyzed, and the intermediate value is obtained therefrom as the target pressure holding time. The preset pressure holding pressure of each layer is adjusted according to the target pressure holding time, so that each layer of the board blank simultaneously completes pressure holding, ensuring the quality of the hot pressing finished product while enabling each layer of the board blank to synchronously complete each stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings herein are incorporated into the specification and form a part of the specification, showing embodiments consistent with the present invention and used together with the specification to explain the principles of the present invention.

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a flowchart of a multi-sensor fusion fiberboard hot pressing control method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0020] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0021] Embodiment 1 Refer to Figure 1 As shown, a fiberboard hot pressing control method for multi-sensor fusion provided by the present invention specifically includes the following steps: S1. Obtain the blank information of the blanks on each layer in a multi-layer hot press, as well as the first pre-pressing distance of the hot pressing upper plate on each layer, where the blank information includes material, initial thickness, and target thickness; S2. Analyze the actual pre-pressing distance of the hot pressing upper plate on each layer according to the first pre-pressing distance; S3. The hot pressing upper plate on each layer performs pre-pressing according to the corresponding actual pre-pressing distance, and monitors the displacement and downward pressing speed of the hot pressing upper plate on each layer through a displacement sensor and a speed sensor; S4. According to the displacement and downward pressing speed of the hot pressing upper plate on each layer, analyze in real time whether the time for completing pre-pressing of the hot pressing upper plate on each layer is synchronized. If not, adjust the downward pressing speed of the hot pressing upper plate on each layer; S5. After completing pre-pressing, according to the blank information and the preset hot pressing temperature and preset pressure on each layer, analyze the estimated time required for the blanks on each layer to reach the corresponding target thickness, obtain the intermediate value as the target time from them, and adjust the preset pressure on each layer according to the target time, so that the blanks on each layer are simultaneously compressed to the target thickness; S6. After entering the pressure holding stage, according to the blank information and the preset pressure holding temperature and preset pressure holding pressure on each layer, analyze the estimated pressure holding time of the blanks on each layer, obtain the intermediate value as the target pressure holding time from them, and adjust the preset pressure holding pressure on each layer according to the target pressure holding time, so that the blanks on each layer complete pressure holding simultaneously.

[0022] S1. Obtain the blank information of the blanks on each layer in a multi-layer hot press, as well as the first pre-pressing distance of the hot pressing upper plate on each layer: In the multi-layer hot press of this solution, each layer corresponds to a hot pressing lower plate and a hot pressing upper plate. Both the hot pressing lower plate and the hot pressing upper plate are hot pressing plates. It should be noted that the hot pressing lower plate and the hot pressing upper plate are only distinguished in space and are relative. The slab is placed on the hot pressing lower plate, and then the hot pressing upper plate is used to hot press the slab. Moreover, in this solution, the hot pressing lower plate of each layer is the hot pressing upper plate of the corresponding lower layer, and the hot pressing upper plate of each layer is the hot pressing lower plate of the corresponding upper layer.

[0023] The first pre-pressing distance is specifically the distance between the lower surface of the hot pressing upper plate of each layer and the upper surface of the corresponding slab before pressing down.

[0024] S2. Analyze the actual pre-pressing distance of the hot pressing upper plates of each layer according to the first pre-pressing distance: ; Among them, represents the actual pre-pressing distance of the hot pressing upper plate of the nth layer, and n represents the layer number of the hot pressing upper plate being analyzed currently. represents the first pre-pressing distance of the hot pressing upper plate of the ith layer, and i is an index symbol. i = 1 represents the bottom layer.

[0025] Since in the multi-layer hot press of this solution, the hot pressing lower plate of each layer is the hot pressing upper plate of the corresponding lower layer, and the hot pressing upper plate of each layer is the hot pressing lower plate of the corresponding upper layer, and the slab is placed on the hot pressing lower plate, it means that when pressing down, the slabs except the first layer (i.e., the bottom layer) will also move down synchronously. Therefore, the distance required for the hot pressing upper plates except the first layer to actually press down to the upper surface of the corresponding slab will be greater than the corresponding first pre-pressing distance.

[0026] S3. The hot pressing upper plates of each layer perform pre-pressing according to the corresponding actual pre-pressing distance, and the displacement and downward pressing speed of the hot pressing upper plates of each layer are monitored through displacement sensors and speed sensors: The pre-pressing specifically means that the hot pressing upper plate presses down to the position of the upper surface of the corresponding slab.

[0027] S4. According to the displacement and downward pressing speed of the hot pressing upper plates of each layer, analyze in real time whether the time taken for the hot pressing upper plates of each layer to complete pre-pressing is the same. If not, adjust the downward pressing speed of the hot pressing upper plates of each layer: The real-time analysis of whether the time taken for the hot pressing upper plates of each layer to complete pre-pressing is the same is specifically: ; Among them, represents the time taken for the hot pressing upper plate of the nth layer to complete pre-pressing. represents the displacement of the hot pressing upper plate of the nth layer. represents the downward pressing speed of the hot pressing upper plate of the nth layer.

[0028] Adjust the downward pressure speed of the hot pressing upper plates of each layer. Specifically, the adjusted downward pressure speed of the hot pressing upper plates of each layer should satisfy: ; where 1, 2....N all represent the layer numbers of the hot pressing upper plates, N represents the topmost hot pressing upper plate, and vt represents the adjusted downward pressure speed.

[0029] If the downward pressure speed of a hot pressing upper plate is adjusted, then in the step of analyzing in real time whether the pre-pressing time used by the hot pressing upper plates of each layer is the same, the downward pressure speed for calculating its pre-pressing time used is its adjusted downward pressure speed.

[0030] In a multi-layer hot press, the heating surfaces of the hot pressing upper plates and the lower plates have been preheated according to the preset temperature at the beginning. If the hot pressing upper plates of each layer do not reach the corresponding pre-pressing positions synchronously, then a certain layer arrives in advance, resulting in the slab of this layer being heated earlier than the slabs of other layers. In this way, it is easy to cause the imbalance of various hot pressing parameters in the subsequent formal hot pressing, so that the hot pressing cannot be completed synchronously, which affects both the quality of the fiberboard and the hot pressing efficiency. Therefore, this solution analyzes in real time the pre-pressing time used by the hot pressing upper plates of each layer and then adjusts the downward pressure speed of the hot pressing upper plates of each layer in real time to ensure that the hot pressing upper plates of each layer complete pre-pressing synchronously, improving the hot pressing efficiency and product quality.

[0031] S5. After completing pre-pressing, according to the slab information and the preset hot pressing temperature and pressure of each layer, analyze the expected time for the slabs of each layer to reach the corresponding target thickness, obtain the intermediate value as the target time from them, and adjust the preset pressure of each layer according to the target time: The analysis of the expected time for the slabs of each layer to reach the corresponding target thickness is specifically to analyze the expected time for the slabs of each layer to reach the corresponding target thickness through a pre-trained first deep learning model.

[0032] The first deep learning model is pre-trained using multiple groups of different slab information, hot pressing temperature, pressure, target thickness, and actual time as the training set, and the output result is a time value.

[0033] The adjustment of the preset hot pressing temperature and pressure of each layer according to the target time is specifically through a pre-trained second deep learning model. According to the slab information and the preset hot pressing temperature of each layer, estimate the pressure required for the slabs of each layer to be compressed to the target thickness in the target time.

[0034] The second deep learning model is pre-trained using multiple groups of different slab information, hot pressing temperature, pressure, target thickness, and actual time as the training set, and the output result is a pressure value.

[0035] S6. After entering the pressure-holding stage, based on the slab information and the preset pressure-holding temperature and pressure of each layer, analyze the expected pressure-holding time of each layer of slab, obtain the median value as the target pressure-holding time from them, and adjust the preset pressure-holding pressure of each layer according to the target pressure-holding time to enable each layer of slab to complete pressure-holding simultaneously: The analysis of the expected pressure-holding time of each layer of slab specifically analyzes the expected pressure-holding time of each layer of slab through a pre-trained third deep learning model.

[0036] The third deep learning model is pre-trained using multiple groups of different slab information, pressure-holding temperature, pressure-holding pressure, and actual pressure-holding time as the training set, and the output result is a time value.

[0037] The adjustment of the preset pressure-holding pressure of each layer according to the target pressure-holding time specifically passes through a pre-trained fourth deep learning model, and according to the slab information and preset pressure-holding temperature of each layer, estimates the pressure-holding pressure required for each layer of slab to complete pressure-holding with the target pressure-holding time.

[0038] The fourth deep learning model is pre-trained using multiple groups of different slab information, pressure-holding temperature, pressure-holding pressure, and actual pressure-holding time as the training set, and the output result is a pressure value.

[0039] The pressure-holding stage refers to a period of time when the fiberboard maintains a constant pressure and temperature after reaching the target pressure-holding pressure and temperature in the hot press. The wood fibers in the fiberboard are bonded by adhesives (such as urea-formaldehyde resin, phenolic resin). The high-temperature and high-pressure environment in the pressure-holding stage enables the adhesive to fully crosslink and cure. At the same time, the fibers are closely arranged under high pressure. The pressure-holding stage eliminates the interlayer voids and fiber rebound through continuous pressure, reduces the risk of thickness rebound and subsequent warping deformation of the board, and the pressure-holding stage can evenly transfer heat to the core layer of the board, avoiding the "undercooked" phenomenon where the surface layer cures prematurely while the core layer does not fully react, and ensuring that the density of the core layer and the surface layer of the board is consistent.

[0040] Step S6 also includes that during the pressure-holding process of each layer, the real-time temperature of each layer of slab is obtained in real time through a temperature sensor, and it is judged whether the real-time temperature of each layer of slab is within the corresponding preset temperature range. If not, the pressure-holding temperature of the corresponding layer is adjusted to make the real-time temperature of the slab of this layer re-enter the corresponding preset temperature range. Specifically: If the real-time temperature of the slab is less than the minimum value of the corresponding preset temperature range, increase the lower surface temperature of the upper hot press plate of this layer and increase the upper surface temperature of the lower hot press plate of this layer; If the real-time temperature of the slab is greater than the maximum value of the corresponding preset temperature range, decrease the lower surface temperature of the upper hot press plate of this layer and decrease the upper surface temperature of the lower hot press plate of this layer.

[0041] Since in this solution, the hot pressing lower plate of each layer serves as the hot pressing upper plate of the corresponding lower layer, and the hot pressing upper plate of each layer serves as the hot pressing lower plate of the corresponding upper layer, to prevent the temperature of the hot pressing upper plate from affecting the slab of the upper layer, each hot pressing plate is internally partitioned into upper and lower spaces. Each of the lower space and the upper space is provided with an independently controlled heating device. The heating device in the lower space is used to control the temperature of the lower surface of the hot pressing plate, and the heating device in the upper space is used to control the temperature of the upper surface of the hot pressing plate.

[0042] In some embodiments, the displacement sensor, speed sensor, and temperature sensor are all temperature-compensated and calibrated.

[0043] Embodiment 2 The present invention also provides a fiberboard hot pressing control system with multi-sensor fusion, specifically including: A data acquisition module, configured to acquire the slab information of the slabs in each layer of a multi-layer hot press, as well as the first pre-pressing distance of the hot pressing upper plate of each layer. The slab information includes material, initial thickness, and target thickness; A first analysis module, configured to analyze the actual pre-pressing distance of the hot pressing upper plate of each layer according to the first pre-pressing distance; A displacement sensor, configured to monitor the displacement of the hot pressing upper plate of each layer during pre-pressing; A speed sensor, configured to monitor the downward pressing speed of the hot pressing upper plate of each layer during pre-pressing; A first adjustment module, configured to analyze in real time whether the pre-pressing completion times of the hot pressing upper plates of each layer are synchronized according to the displacement and downward pressing speed of the hot pressing upper plates of each layer. If not synchronized, adjust the downward pressing speed of the hot pressing upper plates of each layer; A second analysis module, configured to, after pre-pressing is completed, analyze the estimated time required for the slabs of each layer to reach the corresponding target thickness according to the slab information, as well as the preset hot pressing temperature and preset pressure of each layer, and obtain the median value as the target time; A second adjustment module, configured to adjust the preset pressure of each layer according to the target time, so that the slabs of each layer are simultaneously compressed to the target thickness; A third analysis module, configured to, after entering the pressure-holding stage, analyze the estimated pressure-holding time of the slabs of each layer according to the slab information, as well as the preset pressure-holding temperature and preset pressure-holding pressure of each layer, and obtain the median value as the target pressure-holding time; A third adjustment module, configured to adjust the preset pressure-holding pressure of each layer according to the target pressure-holding time, so that the slabs of each layer simultaneously complete pressure-holding.

[0044] The specific implementation of the above modules is consistent with the above-mentioned fiberboard hot pressing control method with multi-sensor fusion, and will not be elaborated here.

[0045] This system further includes: A temperature sensor, configured to acquire the real-time temperature of the slabs of each layer in real time; The fourth adjustment module is used to determine whether the real-time temperature of each layer of slab is within the corresponding preset temperature range. If not, it adjusts the holding pressure temperature of the corresponding layer to make the real-time temperature of the slab of this layer fall within the corresponding preset temperature range again. Specifically: If the real-time temperature of the slab is lower than the minimum value of the corresponding preset temperature range, increase the lower surface temperature of the upper hot pressing plate of this layer and increase the upper surface temperature of the lower hot pressing plate of this layer; If the real-time temperature of the slab is higher than the maximum value of the corresponding preset temperature range, decrease the lower surface temperature of the upper hot pressing plate of this layer and decrease the upper surface temperature of the lower hot pressing plate of this layer.

[0046] Embodiment III The present invention also provides an electronic device, including: a processor, a sending device, an input device, an output device, and a memory. The processor can be implemented in ways such as a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit, or one or more integrated circuits, etc., and is used to execute relevant programs to implement the technical solutions provided by the embodiments of the present application. The memory can be implemented in forms such as a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM), etc., and is used to store computer program codes. The computer program codes include computer instructions. When the processor executes the computer instructions, the electronic device executes the method in any one of the possible implementation manners as described above.

[0047] Embodiment IV The present invention also provides a computer-readable storage medium. A computer program is stored in the computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by the processor of the electronic device, the processor is enabled to execute the method in any one of the possible implementation manners as described above.

[0048] The beneficial effects of the present invention are as follows: By using sensors to monitor the displacement and downward pressure speed of the upper hot pressing plates of each layer, the present invention analyzes in real time the time when the upper hot pressing plates of each layer complete pre-pressing, thereby adjusting the downward pressure speed when the upper hot pressing plates of each layer are pre-pressed. Before formal compression, it analyzes the estimated time for the slabs of each layer to reach the corresponding target thickness, obtains the intermediate value as the target time from this, and adjusts the preset pressure of each layer according to the target time, so that the slabs of each layer are simultaneously compressed to the target thickness. During the holding pressure stage, it analyzes the estimated holding pressure time of the slabs of each layer, obtains the intermediate value as the target holding pressure time from this, and adjusts the preset holding pressure of each layer according to the target holding pressure time, so that the slabs of each layer complete the holding pressure simultaneously, ensuring the quality of the hot pressing finished product while enabling the slabs of each layer to complete synchronously in each stage.

[0049] In the description of the specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0050] In addition, in each embodiment of the present application, each functional unit may be integrated in a processing unit, may exist separately physically for each unit, or two or more units may be integrated in one unit. The above integrated unit may be implemented in the form of hardware or in the form of a software functional unit. If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks, or optical discs that can store programs.

[0051] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A fiberboard hot pressing control method based on multi-sensor fusion, characterized in that, It includes the following steps: Obtain the slab information of the slabs on each layer in a multi-layer hot press, as well as the first pre-pressing distance of the hot pressing upper plate on each layer. The slab information includes material, initial thickness, and target thickness; Analyze the actual pre-pressing distance of the hot pressing upper plate on each layer according to the first pre-pressing distance; The hot pressing upper plates on each layer perform pre-pressing according to the corresponding actual pre-pressing distance, and monitor the displacement and downward pressing speed of the hot pressing upper plates on each layer through displacement sensors and speed sensors; According to the displacement and downward pressing speed of the hot pressing upper plates on each layer, analyze in real time whether the time for the hot pressing upper plates on each layer to complete pre-pressing is synchronized. If not, adjust the downward pressing speed of the hot pressing upper plates on each layer; After completing pre-pressing, according to the slab information and the preset hot pressing temperature and preset pressure on each layer, analyze the estimated time required for the slabs on each layer to reach the corresponding target thickness, obtain the median value therefrom as the target time, and adjust the preset pressure on each layer according to the target time, so that the slabs on each layer are simultaneously compressed to the target thickness; After entering the pressure holding stage, according to the slab information and the preset pressure holding temperature and preset pressure holding pressure on each layer, analyze the estimated pressure holding time of the slabs on each layer, obtain the median value therefrom as the target pressure holding time, and adjust the preset pressure holding pressure on each layer according to the target pressure holding time, so that the slabs on each layer complete pressure holding simultaneously.

2. The fiberboard hot pressing control method with multi-sensor fusion according to claim 1, characterized in that, The analyzing the actual pre-pressing distance of the hot pressing upper plate on each layer according to the first pre-pressing distance: ； Among them, represents the actual pre-pressing distance of the nth layer of the hot pressing upper plate, where n represents the layer number of the hot pressing upper plate being analyzed currently. represents the first pre-pressing distance of the ith layer of the hot pressing upper plate. i is an index symbol, and i = 1 represents the bottommost layer.

3. The multi-sensor fusion fiberboard hot pressing control method according to claim 2, characterized in that, The analyzing in real time whether the time for the hot pressing upper plates on each layer to complete pre-pressing is the same, specifically: ； Among them, represents the time taken for the pre-pressing of the upper hot pressing plate of the nth layer to be completed, represents the displacement of the upper hot pressing plate of the nth layer, represents the downward pressing speed of the upper hot pressing plate of the nth layer.

4. The fiberboard hot pressing control method with multi-sensor fusion according to claim 3, characterized in that The adjusting the downward pressing speed of the hot pressing upper plates on each layer, specifically making the adjusted downward pressing speed of the hot pressing upper plates on each layer satisfy: ； Wherein, the subscripts 1, 2....N all represent the layer numbers of the hot pressing upper plates, N represents the topmost hot pressing upper plate, and vt represents the adjusted downward pressing speed.

5. The method for controlling the hot pressing of fiberboard by multi-sensor fusion according to claim 1, characterized in that, The analyzing the estimated time required for the slabs on each layer to reach the corresponding target thickness, specifically analyzing the estimated time required for the slabs on each layer to reach the corresponding target thickness through a pre-trained first deep learning model; The adjusting the preset hot pressing temperature and preset pressure on each layer according to the target time, specifically through a pre-trained second deep learning model, estimating the pressure required for the slabs on each layer to be compressed to the target thickness at the target time according to the slab information and the preset hot pressing temperature on each layer.

6. The method for controlling the hot pressing of fiberboard by multi-sensor fusion according to claim 1, wherein The analyzing the estimated pressure holding time of the slabs on each layer, specifically analyzing the estimated pressure holding time of the slabs on each layer through a pre-trained third deep learning model; The adjusting the preset pressure holding pressure on each layer according to the target pressure holding time, specifically through a pre-trained fourth deep learning model, estimating the pressure holding pressure required for each layer of slabs to complete pressure holding at the target pressure holding time according to the slab information and the preset pressure holding temperature on each layer.

7. The fiberboard hot pressing control method with multi-sensor fusion according to claim 1, characterized in that During the pressure holding process of each layer, the real-time temperature of the slabs on each layer is also obtained in real time through a temperature sensor, and it is judged whether the real-time temperature of the slabs on each layer is within the corresponding preset temperature range. If not, adjust the pressure holding temperature of the corresponding layer to make the real-time temperature of the slabs on that layer re-enter the corresponding preset temperature range.

8. The method for controlling the hot pressing of fiberboard by multi-sensor fusion according to claim 7, characterized in that, The adjusting the pressure holding temperature of the corresponding layer to make the real-time temperature of the slabs on that layer re-enter the corresponding preset temperature range, specifically: If the real-time temperature of the slab is less than the minimum value of the corresponding preset temperature range, increase the lower surface temperature of the upper hot pressing plate of this layer and increase the upper surface temperature of the lower hot pressing plate of this layer; If the real-time temperature of the slab is greater than the maximum value of the corresponding preset temperature range, decrease the lower surface temperature of the upper hot pressing plate of this layer and decrease the upper surface temperature of the lower hot pressing plate of this layer.

9. A fiberboard hot pressing control system with multi-sensor fusion, which applies the fiberboard hot pressing control method with multi-sensor fusion according to any one of claims 1 to 8, characterized in that, Including: A data acquisition module, configured to acquire the slab information of the slabs of each layer in a multi-layer hot press, and the first pre-pressing distance of the upper hot pressing plate of each layer, where the slab information includes material, initial thickness, and target thickness; A first analysis module, configured to analyze the actual pre-pressing distance of the upper hot pressing plate of each layer according to the first pre-pressing distance; A displacement sensor, configured to monitor the displacement of the upper hot pressing plate of each layer during pre-pressing; A speed sensor, configured to monitor the downward pressing speed of the upper hot pressing plate of each layer during pre-pressing; A first adjustment module, configured to analyze in real time whether the pre-pressing completion times of the upper hot pressing plates of each layer are synchronized according to the displacement and downward pressing speed of the upper hot pressing plates of each layer. If they are not synchronized, adjust the downward pressing speed of the upper hot pressing plates of each layer; A second analysis module, configured to, after pre-pressing is completed, analyze the estimated time required for the slabs of each layer to reach the corresponding target thickness according to the slab information, the preset hot pressing temperature, and the preset pressure of each layer, and obtain the median value therefrom as the target time; A second adjustment module, configured to adjust the preset pressure of each layer according to the target time, so that the slabs of each layer are simultaneously compressed to the target thickness; A third analysis module, configured to, after entering the pressure holding stage, analyze the estimated pressure holding time of the slabs of each layer according to the slab information, the preset pressure holding temperature, and the preset pressure holding pressure of each layer, and obtain the median value therefrom as the target pressure holding time; A third adjustment module, configured to adjust the preset pressure holding pressure of each layer according to the target pressure holding time, so that the slabs of each layer complete pressure holding simultaneously.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, the computer program includes program instructions, and when the program instructions are executed by a processor of an electronic device, the processor is caused to execute the multi-sensor fusion fiberboard hot pressing control method according to any one of claims 1 to 8.

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