A multi-sensor fusion method for controlling the hot pressing of fiberboard

Abstract

This invention discloses a multi-sensor fusion-based fiberboard hot pressing control method, belonging to the field of equipment control technology. The invention monitors the displacement and pressing speed of each layer of the hot pressing platen using sensors, analyzes the pre-pressing time of each layer in real time, and adjusts the pressing speed of each layer during pre-pressing accordingly. Before formal compression, it analyzes the estimated time for each layer to reach the corresponding target thickness, obtains an intermediate value as the target time, and adjusts the preset pressure of each layer according to the target time, allowing each layer to be compressed to the target thickness simultaneously. During the holding pressure stage, it analyzes the estimated holding pressure time of each layer, obtains an intermediate value as the target holding pressure time, and adjusts the preset holding pressure of each layer according to the target holding pressure time, allowing each layer to complete holding pressure simultaneously. This ensures the quality of the hot-pressed finished product while ensuring that each layer completes the process synchronously at each stage.

Description

Technical Field

[0001] This invention relates to the field of equipment control technology, and in particular to a multi-sensor fusion method for controlling the hot pressing of fiberboard. Background Technology

[0002] Fiberboard is a type of engineered wood product made from wood or other plant fibers. These fibers are mechanically processed into fibers and then hot-pressed under heat and pressure using synthetic resins or other suitable adhesives.

[0003] In fiberboard production lines, multi-layer hot presses can simultaneously hot press multiple boards, greatly improving production efficiency. However, in existing technologies, hot pressing is usually performed uniformly after setting fixed parameters. Due to differences between boards, the required hot pressing parameters may be the same. Therefore, if a uniform parameter setting is to be used to hot press qualified fiberboard, it is impossible to ensure that the hot pressing of each board is synchronized, thereby reducing production efficiency. On the other hand, if the same parameters are used for synchronized hot pressing, the quality of the hot-pressed product may be substandard. Therefore, how to automatically adjust the hot pressing parameters to ensure the quality of hot pressing while performing synchronized hot pressing is an urgent problem to be solved. Summary of the Invention

[0004] To address the technical problems existing in the prior art, this invention provides a multi-sensor fusion-based fiberboard hot pressing control method, comprising the following steps:

[0005] Obtain the slab information of each layer in the multi-layer hot press, as well as the first pre-pressing distance of the hot press plate of each layer. The slab information includes material, initial thickness and target thickness.

[0006] The actual pre-compression distance of each hot-pressed upper plate is analyzed based on the first pre-compression distance.

[0007] Each hot-pressing plate is pre-pressed according to the corresponding actual pre-pressing distance, and the displacement and pressing speed of each hot-pressing plate are monitored by displacement sensors and speed sensors;

[0008] Based on the displacement and pressing speed of each hot press plate, analyze in real time whether the pre-pressing time of each hot press plate is synchronized. If they are not synchronized, adjust the pressing speed of each hot press plate.

[0009] After pre-compression is completed, based on the slab information and the preset hot-compression temperature and preset pressure of each layer, the estimated time for each layer of slab to reach the corresponding target thickness is analyzed, and the intermediate value is obtained as the target time. The preset pressure of each layer is adjusted according to the target time so that each layer of slab is compressed to the target thickness at the same time.

[0010] After entering the pressure holding stage, based on the slab information and the preset pressure holding temperature and preset pressure holding pressure of each layer, the expected pressure holding time of each layer of slab is analyzed, and the intermediate value is obtained 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 slab can complete the pressure holding simultaneously.

[0011] Furthermore, the actual pre-compression distance of each hot-pressed upper plate is analyzed based on the first pre-compression distance:

[0012] ;

[0013] in, This represents the actual pre-compression distance of the nth hot-pressing upper platen, where n represents the layer number of the hot-pressing upper platen currently being analyzed. This indicates the first pre-compression distance of the i-th hot-pressed upper plate, where i is the index symbol, and i=1 indicates the bottom layer.

[0014] Furthermore, the real-time analysis of whether the pre-pressing time for each hot-pressing platen is the same specifically includes:

[0015] ;

[0016] in, This indicates the time required for the nth hot-pressed upper plate to complete the pre-pressing. This represents the displacement of the nth hot-pressed upper plate. This indicates the downward pressing speed of the nth hot-pressing plate.

[0017] Furthermore, the adjustment of the pressing speed of each hot-pressing platen specifically ensures that the adjusted pressing speed of each hot-pressing platen satisfies the following:

[0018] ;

[0019] Where 1, 2...N represent the layer number of the hot press plate, N represents the top hot press plate, and vt represents the adjusted pressing speed.

[0020] Furthermore, the analysis of the estimated time for each layer of slab to reach the corresponding target thickness is specifically performed by analyzing the estimated time for each layer of slab to reach the corresponding target thickness using a pre-trained first deep learning model.

[0021] The process of adjusting the preset hot-pressing temperature and preset pressure of each layer according to the target time is specifically achieved by using a pre-trained second deep learning model to estimate the pressure required to compress each layer of slab to the target thickness within the target time, based on the slab information of each layer and the preset hot-pressing temperature.

[0022] Furthermore, the analysis of the expected holding time for each layer of slab is specifically performed by analyzing the expected holding time for each layer of slab using a pre-trained third deep learning model.

[0023] The adjustment of the preset holding pressure of each layer according to the target holding time is specifically achieved by using a pre-trained fourth deep learning model to estimate the holding pressure required for each layer to complete the holding time according to the slab information and preset holding temperature of each layer.

[0024] Furthermore, during the pressure holding process of each layer, the real-time temperature of each layer of slab is obtained through temperature sensors to determine 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 so that the real-time temperature of that layer of slab is back within the corresponding preset temperature range.

[0025] Furthermore, adjusting the holding temperature of the corresponding layer to bring the real-time temperature of the slab back within the corresponding preset temperature range specifically involves:

[0026] If the real-time temperature of the slab is less than the minimum value of the corresponding preset temperature range, then increase the lower surface temperature of the hot-pressed upper plate and increase the upper surface temperature of the hot-pressed lower plate.

[0027] If the real-time temperature of the slab is greater than the maximum value of the corresponding preset temperature range, then the lower surface temperature of the hot-pressed upper plate and the upper surface temperature of the hot-pressed lower plate will be reduced.

[0028] The present invention also provides a multi-sensor fusion fiberboard hot pressing control system, comprising:

[0029] The data acquisition module is used to acquire the slab information of each layer of the slab in the multi-layer hot press, as well as the first pre-pressing distance of the hot press plate of each layer. The slab information includes material, initial thickness and target thickness.

[0030] The first analysis module is used to analyze the actual pre-compression distance of each hot-pressed upper plate based on the first pre-compression distance.

[0031] Displacement sensors are used to monitor the displacement of each hot-pressed platen during pre-pressing;

[0032] Speed ​​sensors are used to monitor the pressing speed of each hot-pressed upper platen during pre-pressing;

[0033] The first adjustment module is used to analyze in real time whether the pre-pressing time of each hot press plate is synchronized based on the displacement and pressing speed of each hot press plate. If they are not synchronized, the pressing speed of each hot press plate is adjusted.

[0034] The second analysis module is used to analyze the estimated time for each layer of slab to reach the corresponding target thickness after the pre-pressing is completed, based on the slab information and the preset hot pressing temperature and preset pressure of each layer, and obtain the intermediate value as the target time.

[0035] The second adjustment module 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 at the same time.

[0036] The third analysis module is used to analyze the expected holding time of each layer of slab after entering the holding stage, based on the slab information and the preset holding temperature and preset holding pressure of each layer, and obtain the intermediate value as the target holding time.

[0037] The third adjustment module is used to adjust the preset pressure of each layer according to the target pressure holding time, so that each layer of slab can complete the pressure holding at the same time.

[0038] The present invention also provides a computer-readable storage medium storing a computer program, the computer program including program instructions, which, when executed by a processor of an electronic device, cause the processor to perform the multi-sensor fusion fiberboard hot pressing control method as described in any one of the preceding claims.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] This invention monitors the displacement and pressing speed of each hot-pressing platen in real time using sensors, analyzes the pre-pressing time of each hot-pressing platen, and adjusts the pressing speed of each hot-pressing platen during pre-pressing accordingly. Before formal compression, it analyzes the estimated time for each slab to reach the corresponding target thickness, obtains the median value as the target time, and adjusts the preset pressure of each layer according to the target time, so that each slab is compressed to the target thickness simultaneously. During the holding pressure stage, it analyzes the estimated holding pressure time of each slab, obtains the median value as the target holding pressure time, and adjusts the preset holding pressure of each layer according to the target holding pressure time, so that each slab completes the holding pressure simultaneously. This ensures the quality of the hot-pressed finished product while ensuring that each slab completes the process synchronously at each stage. Attached Figure Description

[0041] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a flowchart of a multi-sensor fusion fiberboard hot pressing control method according to the present invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0046] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" and "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0047] Example 1

[0048] See Figure 1 As shown, the present invention provides a multi-sensor fusion-based fiberboard hot pressing control method, which specifically includes the following steps:

[0049] S1. Obtain the slab information of each layer of the slab in the multi-layer hot press, as well as the first pre-pressing distance of the hot press plate of each layer. The slab information includes material, initial thickness and target thickness.

[0050] S2. Analyze the actual pre-compression distance of each hot-pressed upper plate based on the first pre-compression distance;

[0051] S3. Each hot-press upper plate is pre-pressed according to the corresponding actual pre-pressing distance, and the displacement and pressing speed of each hot-press upper plate are monitored by displacement sensors and speed sensors.

[0052] S4. Based on the displacement and pressing speed of each hot press plate, analyze in real time whether the pre-pressing time of each hot press plate is synchronized. If they are not synchronized, adjust the pressing speed of each hot press plate.

[0053] S5. After pre-compression is completed, based on the slab information and the preset hot-compression temperature and preset pressure of each layer, analyze the estimated time for each layer of slab to reach the corresponding target thickness, obtain the intermediate value as the target time, and adjust the preset pressure of each layer according to the target time so that each layer of slab is compressed to the target thickness at the same time.

[0054] S6. After entering the pressure holding stage, based on the slab information and the preset pressure holding temperature and preset pressure holding pressure of each layer, analyze the expected pressure holding time of each layer of slab, obtain the intermediate value as the target pressure holding time, and adjust the preset pressure holding pressure of each layer according to the target pressure holding time so that each layer of slab can complete the pressure holding simultaneously.

[0055] S1. Obtain the slab information of each layer in the multi-layer hot press, as well as the first pre-pressing distance of the hot press platen of each layer:

[0056] In this multi-layer hot press, each layer has a lower hot press plate and an upper hot press plate. Both the lower and upper hot press plates are hot press plates. It should be noted that the distinction between the lower and upper hot press plates is only spatial and relative. The slab is placed on the lower hot press plate, and then the upper hot press plate is used to hot press the slab. In this solution, the lower hot press plate of each layer corresponds to the upper hot press plate of the next layer, and the upper hot press plate of each layer corresponds to the lower hot press plate of the previous layer.

[0057] The first pre-pressing distance is specifically the distance from the lower surface of the hot-pressed upper plate of each layer to the upper surface of the corresponding slab before pressing.

[0058] S2. Analyze the actual pre-compression distance of each hot-pressed upper plate based on the first pre-compression distance:

[0059] ;

[0060] in, This represents the actual pre-compression distance of the nth hot-pressing upper platen, where n represents the layer number of the hot-pressing upper platen currently being analyzed. This indicates the first pre-compression distance of the i-th hot-pressed upper plate, where i is the index symbol, and i=1 indicates the bottom layer.

[0061] In this multi-layer hot press, each layer's lower hot press plate is the corresponding upper hot press plate of the next layer, and each layer's upper hot press plate is the corresponding lower hot press plate of the previous layer. Since the slab is placed on the lower hot press plate, it means that when pressing down, the slabs except for the first layer (i.e., the bottom layer) will also move down synchronously. Therefore, the actual distance required for the upper hot press plate (except for the first layer) to press down to the corresponding upper surface of the slab will be greater than the corresponding first pre-pressing distance.

[0062] S3. Each hot-pressing platen is pre-pressed according to the corresponding actual pre-pressing distance, and the displacement and pressing speed of each hot-pressing platen are monitored by displacement sensors and speed sensors:

[0063] The pre-pressing specifically involves pressing the hot-pressing plate down to the corresponding upper surface position of the slab.

[0064] S4. Based on the displacement and pressing speed of each hot press plate, analyze in real time whether the pre-pressing time of each hot press plate is the same. If not, adjust the pressing speed of each hot press plate:

[0065] The real-time analysis of whether the pre-compression time of each hot-pressing platen is the same is specifically as follows:

[0066] ;

[0067] in, This indicates the time required for the nth hot-pressed upper plate to complete the pre-pressing. This represents the displacement of the nth hot-pressed upper plate. This indicates the downward pressing speed of the nth hot-pressing plate.

[0068] The adjustment of the pressing speed of each hot-pressing platen is specifically intended to ensure that the adjusted pressing speed of each hot-pressing platen satisfies the following requirements:

[0069] ;

[0070] Where 1, 2...N represent the layer number of the hot press plate, N represents the top hot press plate, and vt represents the adjusted pressing speed.

[0071] If the pressing speed of the hot press plate is adjusted, then in the step of real-time analysis of whether the pre-pressing time of each hot press plate is the same, the pressing speed of that hot press plate is calculated to be the adjusted pressing speed.

[0072] In multi-layer hot presses, the heating surfaces of the upper and lower hot press plates are preheated at a preset temperature at the beginning. If the upper hot press plates of each layer do not reach the corresponding pre-pressing position synchronously, a certain layer will arrive early, causing the board in that layer to be heated earlier than other boards. This can easily lead to an imbalance in various hot press parameters during the subsequent formal hot press, making it impossible to complete the hot press synchronously. This affects both the quality of the fiberboard and the hot press efficiency. Therefore, this solution analyzes the time taken for each upper hot press plate to complete the pre-pressing in real time and then adjusts the pressing speed of each upper hot press plate in real time to ensure that each upper hot press plate completes the pre-pressing synchronously, thereby improving the hot press efficiency and product quality.

[0073] S5. After pre-pressing is completed, based on the slab information and the preset hot pressing temperature and preset pressure of each layer, analyze the estimated time for each layer of slab to reach the corresponding target thickness, obtain the intermediate value as the target time, and adjust the preset pressure of each layer according to the target time:

[0074] The analysis of the estimated time for each layer of slab to reach the corresponding target thickness is specifically performed by analyzing the estimated time for each layer of slab to reach the corresponding target thickness using a pre-trained first deep learning model.

[0075] The first deep learning model is pre-trained using multiple sets of different slab information, hot pressing temperature, pressure, target thickness and actual time as training sets, and the output result is a time value.

[0076] The process of adjusting the preset hot-pressing temperature and preset pressure of each layer according to the target time is specifically achieved by using a pre-trained second deep learning model to estimate the pressure required to compress each layer of slab to the target thickness within the target time, based on the slab information of each layer and the preset hot-pressing temperature.

[0077] The second deep learning model uses multiple sets of different slab information, hot pressing temperature, pressure, target thickness and actual time as training sets for pre-training, and the output result is the pressure value.

[0078] S6. After entering the pressure holding stage, based on the slab information and the preset pressure holding temperature and preset pressure holding 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, and adjust the preset pressure holding pressure of each layer according to the target pressure holding time, so that each layer of slab completes pressure holding simultaneously.

[0079] The analysis of the expected holding time for each layer of slab is specifically performed by analyzing the expected holding time for each layer of slab using a pre-trained third deep learning model.

[0080] The third deep learning model is pre-trained using multiple sets of different slab information, holding temperature, holding pressure, and actual holding time as training sets, and the output result is a time value.

[0081] The adjustment of the preset holding pressure of each layer according to the target holding time is specifically achieved by using a pre-trained fourth deep learning model to estimate the holding pressure required for each layer to complete the holding time according to the slab information and preset holding temperature of each layer.

[0082] The fourth deep learning model uses multiple sets of different slab information, holding temperature, holding pressure, and actual holding time as training sets for pre-training, and outputs the pressure value.

[0083] The pressure holding stage refers to the period of time during which the fiberboard maintains a constant pressure and temperature after reaching the target pressure and temperature in a hot press. The wood fibers in the fiberboard are bonded together by adhesives (such as urea-formaldehyde resin or phenolic resin). The high temperature and pressure environment of the pressure holding stage allows the adhesive to fully cross-link and cure. Simultaneously, the fibers are tightly packed under high pressure. The continuous pressure during this stage eliminates interlayer voids and fiber springback, reducing the risk of thickness rebound and subsequent warping. Furthermore, the pressure holding stage ensures that heat is evenly transferred to the core layer of the board, preventing the "half-cure" phenomenon where the surface layer cures prematurely while the core layer is not fully reacted, thus ensuring consistent density between the core and surface layers.

[0084] Step S6 also includes, during the pressure holding process of each layer, acquiring the real-time temperature of each layer of slab using a temperature sensor, determining whether the real-time temperature of each layer of slab is within the corresponding preset temperature range, and if not, adjusting the pressure holding temperature of the corresponding layer to bring the real-time temperature of that layer of slab back into the corresponding preset temperature range, specifically:

[0085] If the real-time temperature of the slab is less than the minimum value of the corresponding preset temperature range, then increase the lower surface temperature of the hot-pressed upper plate and increase the upper surface temperature of the hot-pressed lower plate.

[0086] If the real-time temperature of the slab is greater than the maximum value of the corresponding preset temperature range, then the lower surface temperature of the hot-pressed upper plate and the upper surface temperature of the hot-pressed lower plate will be reduced.

[0087] In this scheme, each hot-pressing lower plate corresponds to the hot-pressing upper plate of the next layer, and each hot-pressing upper plate corresponds to the hot-pressing lower plate of the previous layer. To avoid the temperature of the hot-pressing upper plate affecting the upper plate, each hot-pressing plate is divided into two spaces, upper and lower. The lower space and the upper space are each equipped 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.

[0088] In some embodiments, the displacement sensor, velocity sensor, and temperature sensor are all calibrated with temperature compensation.

[0089] Example 2

[0090] This invention also provides a multi-sensor fusion fiberboard hot pressing control system, specifically comprising:

[0091] The data acquisition module is used to acquire the slab information of each layer of the slab in the multi-layer hot press, as well as the first pre-pressing distance of the hot press plate of each layer. The slab information includes material, initial thickness and target thickness.

[0092] The first analysis module is used to analyze the actual pre-compression distance of each hot-pressed upper plate based on the first pre-compression distance.

[0093] Displacement sensors are used to monitor the displacement of each hot-pressed platen during pre-pressing;

[0094] Speed ​​sensors are used to monitor the pressing speed of each hot-pressed upper platen during pre-pressing;

[0095] The first adjustment module is used to analyze in real time whether the pre-pressing time of each hot press plate is synchronized based on the displacement and pressing speed of each hot press plate. If they are not synchronized, the pressing speed of each hot press plate is adjusted.

[0096] The second analysis module is used to analyze the estimated time for each layer of slab to reach the corresponding target thickness after the pre-pressing is completed, based on the slab information and the preset hot pressing temperature and preset pressure of each layer, and obtain the intermediate value as the target time.

[0097] The second adjustment module 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 at the same time.

[0098] The third analysis module is used to analyze the expected holding time of each layer of slab after entering the holding stage, based on the slab information and the preset holding temperature and preset holding pressure of each layer, and obtain the intermediate value as the target holding time.

[0099] The third adjustment module is used to adjust the preset pressure of each layer according to the target pressure holding time, so that each layer of slab can complete the pressure holding at the same time.

[0100] The specific implementation of each of the above modules is consistent with the multi-sensor fusion fiberboard hot pressing control method described above, and will not be repeated here.

[0101] This system also includes:

[0102] Temperature sensors are used to acquire the real-time temperature of each layer of slab.

[0103] 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 temperature of the corresponding layer to bring the real-time temperature of that layer of slab back into the corresponding preset temperature range. Specifically:

[0104] If the real-time temperature of the slab is less than the minimum value of the corresponding preset temperature range, then increase the lower surface temperature of the hot-pressed upper plate and increase the upper surface temperature of the hot-pressed lower plate.

[0105] If the real-time temperature of the slab is greater than the maximum value of the corresponding preset temperature range, then the lower surface temperature of the hot-pressed upper plate and the upper surface temperature of the hot-pressed lower plate will be reduced.

[0106] Example 3

[0107] The present invention also provides an electronic device, including: a processor, a transmitting device, an input device, an output device, and a memory. The processor may be implemented using a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit, or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this application. The memory may be implemented using a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM), and is used to store computer program code. The computer program code includes computer instructions. When the processor executes the computer instructions, the electronic device executes a method as described in any of the above possible implementation methods.

[0108] Example 4

[0109] The present invention also provides a computer-readable storage medium storing a computer program, the computer program including program instructions, which, when executed by a processor of an electronic device, cause the processor to perform a method as described in any of the above possible implementations.

[0110] The beneficial effects of this invention are as follows:

[0111] This invention monitors the displacement and pressing speed of each hot-pressing platen in real time using sensors, analyzes the pre-pressing time of each hot-pressing platen, and adjusts the pressing speed of each hot-pressing platen during pre-pressing accordingly. Before formal compression, it analyzes the estimated time for each slab to reach the corresponding target thickness, obtains the median value as the target time, and adjusts the preset pressure of each layer according to the target time, so that each slab is compressed to the target thickness simultaneously. During the holding pressure stage, it analyzes the estimated holding pressure time of each slab, obtains the median value as the target holding pressure time, and adjusts the preset holding pressure of each layer according to the target holding pressure time, so that each slab completes the holding pressure simultaneously. This ensures the quality of the hot-pressed finished product while ensuring that each slab completes the process synchronously at each stage.

[0112] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0113] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes multiple instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing programs, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0114] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A multi-sensor fusion method for controlling the hot pressing of fiberboard, characterized in that, Includes the following steps: Obtain the slab information of each layer in the multi-layer hot press, as well as the first pre-pressing distance of the hot press plate of each layer. The slab information includes material, initial thickness and target thickness. The actual pre-compression distance of each hot-pressed upper plate is analyzed based on the first pre-compression distance. Each hot-pressing plate is pre-pressed according to the corresponding actual pre-pressing distance, and the displacement and pressing speed of each hot-pressing plate are monitored by displacement sensors and speed sensors; Based on the displacement and pressing speed of each hot press plate, analyze in real time whether the pre-pressing time of each hot press plate is synchronized. If they are not synchronized, adjust the pressing speed of each hot press plate. After pre-compression is completed, based on the slab information and the preset hot-compression temperature and preset pressure of each layer, the estimated time for each layer of slab to reach the corresponding target thickness is analyzed, and the intermediate value is obtained as the target time. The preset pressure of each layer is adjusted according to the target time so that each layer of slab is compressed to the target thickness at the same time. After entering the pressure holding stage, based on the slab information and the preset pressure holding temperature and preset pressure holding pressure of each layer, the expected pressure holding time of each layer of slab is analyzed, and the intermediate value is obtained 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 slab can complete the pressure holding simultaneously. Specifically, the actual pre-compression distance of each hot-pressed upper plate is analyzed based on the first pre-compression distance: ； in, This represents the actual pre-compression distance of the nth hot-pressing upper platen, where n represents the layer number of the hot-pressing upper platen currently being analyzed. This indicates the first pre-compression distance of the i-th hot-pressed upper platen, where i is the index symbol, and i=1 indicates the bottom layer; Specifically, the real-time analysis of whether the pre-pressing time for each hot-pressing platen is the same includes: ； in, This indicates the time required for the nth hot-pressed upper plate to complete the pre-pressing. This represents the displacement of the nth hot-pressed upper plate. This indicates the downward pressing speed of the nth hot-pressing plate; Specifically, adjusting the pressing speed of each hot-pressing platen means ensuring that the adjusted pressing speed of each hot-pressing platen satisfies the following: ； In this context, subscripts 1, 2, ..., N all represent the layer number of the hot press plate, N represents the top hot press plate, and vt represents the adjusted pressing speed.

2. The multi-sensor fusion fiberboard hot-pressing control method according to claim 1, characterized in that, The analysis of the estimated time for each layer of slab to reach the corresponding target thickness is specifically performed by analyzing the estimated time for each layer of slab to reach the corresponding target thickness using a pre-trained first deep learning model. The process of adjusting the preset hot-pressing temperature and preset pressure of each layer according to the target time is specifically achieved by using a pre-trained second deep learning model to estimate the pressure required to compress each layer of slab to the target thickness within the target time, based on the slab information of each layer and the preset hot-pressing temperature.

3. The multi-sensor fusion fiberboard hot-pressing control method according to claim 1, characterized in that, The analysis of the expected holding time for each layer of slab is specifically performed by analyzing the expected holding time for each layer of slab using a pre-trained third deep learning model. The adjustment of the preset holding pressure of each layer according to the target holding time is specifically achieved by using a pre-trained fourth deep learning model to estimate the holding pressure required for each layer to complete the holding time according to the slab information and preset holding temperature of each layer.

4. The multi-sensor fusion fiberboard hot-pressing control method according to claim 1, characterized in that, During the pressure holding process of each layer, the real-time temperature of each layer of slab is also obtained through temperature sensors to determine 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 so that the real-time temperature of that layer of slab is back within the corresponding preset temperature range.

5. The multi-sensor fusion fiberboard hot-pressing control method according to claim 4, characterized in that, The adjustment of the holding temperature of the corresponding layer, so that the real-time temperature of the slab in that layer is back within the corresponding preset temperature range, specifically involves: If the real-time temperature of the slab is less than the minimum value of the corresponding preset temperature range, then increase the lower surface temperature of the hot-pressed upper plate and increase the upper surface temperature of the hot-pressed lower plate. If the real-time temperature of the slab is greater than the maximum value of the corresponding preset temperature range, then the lower surface temperature of the hot-pressed upper plate and the upper surface temperature of the hot-pressed lower plate will be reduced.

6. A multi-sensor fusion fiberboard hot-pressing control system, employing the multi-sensor fusion fiberboard hot-pressing control method as described in any one of claims 1 to 5, characterized in that, include: The data acquisition module is used to acquire the slab information of each layer of the slab in the multi-layer hot press, as well as the first pre-pressing distance of the hot press plate of each layer. The slab information includes material, initial thickness and target thickness. The first analysis module is used to analyze the actual pre-compression distance of each hot-pressed upper plate based on the first pre-compression distance. Displacement sensors are used to monitor the displacement of each hot-pressed platen during pre-pressing; Speed ​​sensors are used to monitor the pressing speed of each hot-pressed upper platen during pre-pressing; The first adjustment module is used to analyze in real time whether the pre-pressing time of each hot press plate is synchronized based on the displacement and pressing speed of each hot press plate. If they are not synchronized, the pressing speed of each hot press plate is adjusted. The second analysis module is used to analyze the estimated time for each layer of slab to reach the corresponding target thickness after the pre-pressing is completed, based on the slab information and the preset hot pressing temperature and preset pressure of each layer, and obtain the intermediate value as the target time. The second adjustment module 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 at the same time. The third analysis module is used to analyze the expected holding time of each layer of slab after entering the holding stage, based on the slab information and the preset holding temperature and preset holding pressure of each layer, and obtain the intermediate value as the target holding time. The third adjustment module is used to adjust the preset pressure of each layer according to the target pressure holding time, so that each layer of slab can complete the pressure holding at the same time.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, the computer program including program instructions, which, when executed by a processor of an electronic device, cause the processor to perform the multi-sensor fusion fiberboard hot pressing control method as described in any one of claims 1 to 5.

Images