Wood board compression resistance detection device and method

Abstract

This invention discloses a device and method for testing the compressive strength of wood-based panels, relating to the field of panel testing technology. The device includes a base plate with a central support seat on its upper surface and a top frame on its upper surface. An embedded microcontroller is mounted on one side of the top frame. A testing mechanism is also mounted on the upper surface of the base plate. The testing mechanism includes an auxiliary plate assembly and a pressure plate assembly. The auxiliary plate assembly includes two telescopic motors, both mounted on the upper surface of the base plate, with a lifting platform at the end of the output shafts of the two motors. The pressure plate assembly includes an upper pressure plate, mounted at the end of the output shaft of a driving hydraulic cylinder, with sliding top frames mounted on all four side surfaces of the upper pressure plate. This solution, by incorporating the testing mechanism, solves the problem of inaccurate test data caused by edge effects, constraint distortion, and missing environmental variables in traditional methods.

Description

Technical Field

[0001] This invention relates to the field of board testing technology, specifically to a device and method for testing the compressive strength of wood-based panels. Background Technology

[0002] As an important building, furniture, and packaging material, the compressive strength of wood-based panels is a key indicator for assessing their mechanical quality and ensuring safe use. To address this, the industry has established a standardized testing system. The core equipment of this system is a universal testing machine. The standard testing procedure is as follows: First, specimens of specified geometric dimensions are cut from the large board according to strict specifications. Then, the specimen is placed vertically in the center of the lower pressure plate of the testing machine. The drive system controls the upper pressure plate to move downwards at a constant rate, applying a continuously increasing compressive load to the specimen. Simultaneously, the integrated force and displacement sensors record the load value and the amount of compressive deformation of the specimen synchronously and continuously until the specimen is completely crushed and destroyed. By analyzing the resulting load-displacement curve, the elastic modulus, proportional limit stress, and most importantly, compressive strength of the wood can be accurately calculated.

[0003] The limitations of existing technologies are mainly reflected in three aspects. First, the test boundary conditions are highly idealized and simplistic. The standard method places the tested wood board on a simple support platform and subject it to the vertical load of a rigid pressure plate. This condition completely ignores the continuous lateral constraints and friction experienced by the wood board during installation and splicing in actual applications. This "free boundary" test condition induces lateral expansion and bending that does not conform to the actual failure mode, making the measured "compressive strength" actually the failure value of the material under unconstrained conditions, and unable to accurately reflect its true load-bearing capacity in constrained structures such as cabinets, walls, or beams and columns. Second, the test process itself introduces significant interference. The hard metal pressure plate edge generates a severe stress concentration effect when it contacts the wood board's corners, often causing the fragile corner areas to crush or crack prematurely. This "edge effect" means that the final failure load often records the local strength of the corners rather than the overall strength of the wood board. The material strength of the wood is greatly affected by the quality of the sample edge processing, resulting in compromised repeatability and authenticity. Thirdly, the testing environment is severely disconnected from the service environment. Standard tests are typically conducted in a constant temperature and humidity laboratory environment, completely excluding temperature and humidity, two crucial environmental variables affecting the mechanical properties of wood. Therefore, the obtained data can only represent the performance of wood under a certain ideal, constant state, and cannot predict its performance degradation patterns and long-term reliability in real-world use environments such as dryness, humidity, and alternating hot and cold conditions. In summary, although existing technologies provide standardized testing procedures, the compressive strength data obtained is a "laboratory parameter" measured under simplified and interfered conditions. This data has an unquantifiable gap with the "engineering performance" of the wood in actual engineering applications, leading to uncertainties in accurate product grading, safety margin design, and evaluation of new material applications. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for testing the compressive strength of wood-based panels, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device and method for testing the compressive strength of wood-based panels, comprising, The foundation base has a central support seat on its upper surface and a top frame on its upper surface. An embedded microcontroller is mounted on one side of the top frame, and a driving hydraulic cylinder is mounted at the center of the upper surface of the top frame. Observation cameras are mounted on both sides of the top frame. A testing mechanism is also mounted on the upper surface of the foundation base. The testing mechanism includes an attachment plate assembly and a pressure plate assembly. The attachment plate assembly includes two telescopic motors, both of which are mounted on the upper surface of the foundation base. A lifting platform is mounted at the end of the output shaft of each of the two telescopic motors. The pressure plate assembly includes: an upper pressure plate disposed at the end of the output shaft of a driving hydraulic cylinder; sliding brackets are provided on all four side surfaces of the upper pressure plate; side connecting rods are provided inside the sliding brackets; a protective edge strip is provided on one side surface of each side connecting rod; a center slit is provided on one side surface of each protective edge strip; a locking rod is provided between every two side connecting rods; and limiting rods that cooperate with the locking rods are also provided on the four side surfaces of the upper pressure plate; an electric rotating shaft is provided at the connection between the limiting rods and the upper pressure plate.

[0006] Furthermore, the upper surface of the lifting platform is provided with four air supply boxes, one side surface of each air supply box is provided with an inflatable rubber bladder, and the bottom surface of each air supply box is provided with a connecting air port, which communicates with the interior of the inflatable rubber bladder.

[0007] Furthermore, the upper surface of the base plate is also provided with an exhaust box, and an air supply pipe is connected between the exhaust box and the air inlet. The upper surface of the lifting platform is also provided with four slidable pressure plates, and the upper surface of the lifting platform is also provided with multiple small telescopic rods for moving the pressure plates.

[0008] Furthermore, a bearing assembly is provided on the upper surface of the central support base, and a wood detection device is provided on the upper surface of the bearing assembly. The bearing assembly includes a bearing worktable, which is disposed on the upper surface of the central support base. Two limiting side rods are provided on the upper surface of the bearing worktable, and a transverse groove is provided on the upper surface of the bearing worktable to facilitate the sliding of the limiting side rods.

[0009] Furthermore, the upper surface of the bearing worktable is also provided with marking scales, and a connecting spring rod is also provided inside the transverse groove. One end of the connecting spring rod is connected to the inner side surface of the transverse groove, and the other end is connected to one side surface of the limiting side rod. The upper surface of the bearing worktable is also provided with two adjustment grooves. A flipping convex plate is provided inside the adjustment groove, and a small screw for driving the flipping convex plate to move is also provided inside the adjustment groove. A small motor is provided at one end of the small screw.

[0010] Furthermore, the testing mechanism also includes a humidity control component, which includes: an additional base plate disposed on one side surface of the base plate; a sliding platform disposed on the upper surface of the additional base plate; a drive motor disposed on one side surface of the sliding platform; the output shaft of the drive motor being located inside the sliding platform; a small sliding frame disposed on the output shaft of the drive motor; a dual-axis motor disposed on one side surface of the small sliding frame; and a meshing movable plate disposed on each of the two output shafts of the dual-axis motor.

[0011] Furthermore, a splicing box plate is provided on one side surface of the meshing movable plate, and a sealing block is provided on one side surface of the splicing box plate via a rotating shaft. A humidity control box is provided on the upper surface of both splicing box plates, and a dryer and a humidifier are respectively provided inside the two humidity control boxes. A connecting shaft is provided on one side surface of the splicing box plate, and a flip sealing plate is provided at the end of the connecting shaft. Support side frames are provided on both sides of the sliding platform.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. In this solution, a pressure plate assembly is installed. During the process of driving the upper pressure plate downward by the hydraulic cylinder, the edge protection strip with suspension design and its center slit allow the wood edges to be naturally embedded. At the contact critical point, the limiting rod driven by the electric rotating shaft automatically releases the locking rod, realizing functional decoupling. This allows the upper pressure plate to descend independently and apply pressure, while the statically fixed flexible edge protection strip continuously wraps around and protects the edges. This ensures that the test load is completely transferred to the core pressure-bearing area of ​​the wood through the rigid upper pressure plate body, while the fragile edges are protected and stress dispersed by the flexible material throughout the process. Thus, this structure effectively eliminates the premature crushing or atypical cracking caused by stress concentration at the edges, ensuring that the peak destructive load data collected by the system accurately corresponds to the intrinsic compressive strength of the wood material as a whole, and significantly improving the authenticity of the test results. 2. In this solution, by setting up an auxiliary plate assembly, the lifting platform is raised by a telescopic motor, allowing four inflatable rubber bladders to precisely fit against the sides of the wood. Controllable air pressure is injected through the exhaust box via a connecting air pipe, causing the inflatable rubber bladders to produce uniform radial expansion. This applies a continuous and flexible surface constraint force to the wood, accurately simulating real boundary conditions such as frame slots and compression of adjacent components. At the same time, the pressure-fixing movable plate driven by multiple small telescopic rods slides inward synchronously, applying controllable mechanical pressure to the edge protection strip from the outside. The uniformity of fluid pressure avoids the local stress concentration and damage caused by traditional rigid clamps. On the other hand, the external rigid backup ensures the absolute stability and reliability of the constraint under extreme loads, suppressing the lateral expansion of the wood caused by the Poisson effect when it is compressed, making its mechanical response closer to the actual working conditions. Thus, the compressive strength of the wood under simulated real boundary constraints can be measured. 3. In this solution, a humidity control component is installed. Through the coordinated control of the drive motor and the dual-axis motor, the two splicing boxes are driven to close smoothly and the sealing plate and sealing block are flipped in conjunction, quickly constructing a sealed pretreatment chamber around the wood being tested. The humidifier and dryer integrated in the humidity control box can accurately introduce humid air or hot dry air into the chamber according to a preset program, thereby dynamically controlling the temperature and relative humidity within the chamber over a wide range. This allows the wood to undergo balanced treatment in various harsh environments, from dry and normal to high humidity, without changing its mechanical testing position. This ensures that the core moisture content is fully balanced with the target environment. This not only avoids positional errors and potential damage caused by specimen transportation, but also ensures that the wood is in a specific and stable environmental state during subsequent compressive strength testing. Therefore, the obtained compressive strength data directly reflects the quantitative relationship between environmental parameters and material properties, solving the problems of uncontrollable environmental variables and strong specificity of performance data in previous tests. This provides key data support for evaluating the long-term performance and reliability of wood in different regions and usage scenarios. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the present invention; Figure 3 This is a schematic diagram of the humidity control component structure of the present invention; Figure 4 This is a schematic diagram of the auxiliary plate assembly structure of the present invention; Figure 5 This is a schematic diagram of the air delivery box and the inflatable rubber bladder structure of the present invention; Figure 6 This is a schematic diagram of the upper pressure plate and sliding top frame structure of the present invention; Figure 7This is a schematic diagram of the edge protection strip and side connecting support rod structure of the present invention; Figure 8 This is a schematic diagram of the supporting component structure of the present invention.

[0014] In the diagram: 1. Base plate; 2. Additional base plate; 3. Sliding platform; 4. Top frame; 5. Central support; 6. Load-bearing workbench; 7. Timber inspection unit; 8. Drive hydraulic cylinder; 9. Telescopic motor; 10. Lifting platform; 11. Exhaust box; 12. Assembled box panel; 13. Connecting air supply pipe; 14. Embedded microcontroller; 15. Small sliding frame; 16. Drive motor; 17. Dual-axis motor; 18. Engaging movable plate; 19. Connecting shaft; 20. Sealing block; 21. Humidity control unit. 21. Box making; 22. Flip-over sealing plate; 23. Support side frame; 24. Air supply box body; 25. Small telescopic rod; 26. Pressing movable plate; 27. Inflatable rubber bladder; 28. Connecting air port; 29. ​​Upper pressure plate; 30. Limiting lever; 31. Sliding top frame; 32. Edge protection strip; 33. Side connecting support rod; 34. Positioning rod; 35. Center opening; 36. Flip-over convex plate; 37. Small screw; 38. Limiting side rod; 39. Marking scale; 40. Connecting spring rod; 41. Observation camera. Detailed Implementation

[0015] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example 1: Please refer to Figures 1 to 8 A device and method for testing the compressive strength of wood-based panels, comprising: A base plate 1 has a central support 5 on its upper surface, a load-bearing component on its upper surface, a wood testing device 7 on its upper surface, a top frame 4 on its upper surface, an embedded microcontroller 14 on one side of the top frame 4, a driving hydraulic cylinder 8 at the center of the top surface of the top frame 4, and observation cameras 41 on both sides of the top frame 4. A testing mechanism is also provided on the upper surface of the base plate 1, comprising an auxiliary plate assembly and a pressure plate assembly. The auxiliary plate assembly includes two telescopic motors 9, both mounted on the upper surface of the base plate 1. A lifting platform 10 is located at the end of the output shaft of each of the two telescopic motors 9. The upper platform of the lifting platform 10 is precision-machined, and four independent air supply boxes 24 are installed on it in a rectangular arrangement. The upper surface of the 10 is provided with four air supply boxes 24. One side surface of each air supply box 24 is provided with an inflatable rubber bladder 27. The bladder is made of high-strength and high-elasticity composite material to ensure durability and shape recovery consistency during repeated inflation and deflation. The bottom surface of the air supply box 24 is provided with a connecting air port 28. The connecting air port 28 is directly connected to the inner cavity of the inflatable rubber bladder 27 through an internal channel. The upper surface of the base plate 1 is also provided with an exhaust box 11. The exhaust box 11 is connected to the connecting air ports 28 at the bottom of the four air supply boxes 24 one by one through a set of regularly arranged connecting air pipes 13, thereby constructing a centralized air supply and independently controllable pneumatic execution system. The upper surface of the lifting platform 10 is also provided with four sliding pressure plates 26. Each pressure plate 26 is connected to a small telescopic rod 25 driven by an embedded microcontroller 14. After the compression test sequence is started, the embedded microcontroller 14 instructs two telescopic motors 9 to synchronously lift the lifting platform 10 until the tops of the four inflatable rubber bags 27 are completely in contact with the sides of the wood 7 being tested. Then, the exhaust box 11 injects controllable air pressure into the inflatable rubber bags 27 through the connecting air pipe 13 and the connecting air port 28, causing it to generate uniform radial expansion, thereby applying a flexible and continuous surface constraint force to the wood around its perimeter. This accurately simulates the circumferential support state of the wood in a real frame structure. To enhance the stability of this constraint, multiple small telescopic rods 25 move synchronously, driving the pressure plate 26 to slide inward, reinforcing and pressing the edge protection strips 32 that have been wrapped around the corners from the outside, ensuring the stability of the lateral constraint and avoiding stress concentration caused by hard contact. Rigid backup ensures the reliability of the constraint under extreme loads, so that the lateral expansion caused by the Poisson effect of the wood during vertical compression is subject to highly realistic constraint. This allows the core compressive strength of the wood under simulated real boundary conditions to be measured, rather than the failure value in a free state.

[0017] The pressure plate assembly is the core module for achieving vertical loading and edge protection. The pressure plate assembly includes: an upper pressure plate 29, which is a rigid pressure plate made of high-strength alloy. The upper pressure plate 29 is located at the end of the output shaft of the driving hydraulic cylinder 8. Each of the four side surfaces of the upper pressure plate 29 is provided with a sliding top frame 31. The sliding top frame 31 is provided with a side connecting support rod 33. Each side surface of the side connecting support rod 33 is provided with an edge protection strip 32. The edge protection strip 32 is made of highly elastic and wear-resistant engineering polyurethane material. One side surface of the edge protection strip 32 is provided with a central slit 35. A locking rod 34 is provided between every two side connecting support rods 33. The four side surfaces of the upper pressure plate 29 are also provided with limiting locking rods 30 that cooperate with the locking rods 34. An electric rotating shaft is provided at the connection between the limiting locking rods 30 and the upper pressure plate 29. During pressure testing, the hydraulic cylinder 8, under the control of the embedded microcontroller 14, drives the upper pressure plate 29 to perform a downward stroke. During this process, the four edge protection strips 32 suspended from the ends of the side connecting rod 33 droop naturally under gravity. Their preset center slits 35 allow the top edges of the wood to be embedded without interference. When the upper pressure plate 29 descends to the critical position where its bottom surface is about to contact the upper surface of the wood, the electric rotating shaft integrated on the side of the upper pressure plate 29 is activated, driving the limiting lever 30 to rotate, thus disengaging it from the locking lever 34 welded to the side connecting rod 33. The upper pressure plate 29 then continues to press down for the main loading, and the edges... The edge protection strip 32 and its connecting mechanism no longer move, but remain fixed in position by its static connection with the locking rod 34. This tightly wraps around the wood edges like a custom-made flexible clamp, allowing the subsequent huge vertical pressure to be completely transmitted to the core area of ​​the upper surface of the wood through the rigid upper pressure plate 29. The flexible sleeve, which is fixed and wrapped around the edges, effectively disperses the stress concentration at the edges, completely preventing premature crushing or cracking of the edges due to stress singularities. Ultimately, the peak failure load recorded by the system truly reflects the ultimate compressive strength of the wood material as a whole, significantly improving the accuracy of the test data and its engineering reference value.

[0018] The bearing assembly is the basic platform for achieving precise positioning and stable support of the tested wood 7. The bearing assembly includes: a bearing workbench 6, which is fixed to the upper surface of the base plate 1 by a central support seat 5, ensuring overall rigidity and stability. The upper surface of the bearing workbench 6 is provided with two limiting side rods 38. The upper surface of the bearing workbench 6 is provided with a transverse groove to facilitate the sliding of the limiting side rods 38. The upper surface of the bearing workbench 6 is also provided with a marking scale 39, which, in conjunction with the observation camera 41, can remotely and accurately read the initial position of the specimen. The transverse groove is also provided with a connecting spring rod 40, which continuously provides elastic reset pointing towards the center of the workbench. One end of the connecting spring rod 40 is connected to the inner side surface of the transverse groove, and the other end is connected to one side surface of the limiting side rods 38. The upper surface of the bearing workbench 6 is also provided with two adjustment grooves. The adjustment grooves are provided with a flipping convex plate 36. The adjustment grooves are also provided with a small screw 37 for moving the flipping convex plate 36. One end of the small screw 37 is provided with a small motor. When the wood 7 is placed on the upper surface of the support table 6, the connecting spring rod 40 integrated in the transverse groove immediately releases its elastic potential energy, driving the limiting side rods 38 on both sides to slide automatically and synchronously towards the center along the transverse groove. This achieves gentle adaptive clamping of the wood's side and completes rapid initial centering. The operator can remotely monitor and confirm the initial position of the wood through the observation camera 41 combined with the high-precision marking scale 39. If micron-level fine adjustment is required, the embedded microcontroller 14 sends a command to start the small motor, driving the small screw 37 to rotate, thereby precisely controlling the horizontal displacement of the flipping convex plate 36 in the adjustment groove. This performs a top-pushing posture correction on the wood from the bottom. This composite positioning mechanism ensures that the wood can be positioned at the geometric center of the support table with extremely high repeatability in every test, establishing a unified and stable spatial reference for all subsequent testing actions. This fundamentally eliminates systematic testing errors caused by specimen placement deviations, demonstrating the high precision and automation innovation of this equipment in the test preparation stage.

[0019] The testing mechanism also includes a humidity conditioning component, which is used to accurately simulate and pre-treat the test wood 7 before mechanical testing. The humidity conditioning component includes: an additional base plate 2, which is set on one side surface of the base plate 1. A sliding platform 3 is set on the upper surface of the additional base plate 2. A drive motor 16 is set on one side surface of the sliding platform 3. The drive motor 16 can precisely control the small sliding frame 15 to perform horizontal reciprocating motion along the sliding platform 3. The output shaft of the drive motor 16 is located inside the sliding platform 3. The small sliding frame 15 is set on the output shaft of the drive motor 16. A dual-axis motor 17 is provided on the side surface. A meshing movable plate 18 is provided on each of the two output shafts of the dual-axis motor 17. A splicing box plate 12 is provided on one side surface of the meshing movable plate 18. A sealing block 20 is provided on one side surface of the splicing box plate 12 via a rotating shaft. A humidity control box 21 is provided on the upper surface of each of the two splicing box plates 12. A dryer and a humidifier are respectively provided inside the two humidity control boxes 21. A connecting shaft 19 is provided on one side surface of the splicing box plate 12. A flip sealing plate 22 is provided at the end of the connecting shaft 19. Support side frames 23 are provided on both sides of the sliding platform 3. Before conducting mechanical testing, when the test plan requires simulating a specific usage environment, the humidity conditioning program is initiated via the embedded microcontroller 14. First, the drive motor 16 on the sliding platform 3 drives the small sliding frame 15 to move horizontally, precisely positioning the entire humidity conditioning assembly at the workstation where the wood 7 is being tested. Subsequently, the dual-axis motor 17 operates, driving the two splicing box plates 12 to smoothly close from both sides via the meshing movable plate 18. Simultaneously, the connecting shaft 19 drives the rotating sealing plate 22 to rotate, and the sealing block 20 moves synchronously, together forming a sealed pretreatment chamber around the wood. Then, according to the preset humidity curve, the humidity is controlled. The humidifier or dryer inside box 21 starts working, injecting humid or hot dry air into the chamber and precisely controlling the temperature and humidity environment inside the chamber to simulate the moisture absorption or drying process of wood under real working conditions such as outdoors, bathroom, and underfloor heating. After the moisture content of the wood core reaches equilibrium with the set environment, the system automatically opens the chamber and the assembled box panel 12 is reset. This design enables in-situ environmental pretreatment to be completed without moving or contacting the specimen, ensuring that the wood is in the target humidity state during subsequent mechanical testing. This allows the obtained compressive strength data to be directly correlated with specific environmental parameters, enhancing the working condition relevance and predictive accuracy of the test results.

[0020] The working principle of this invention is: When in use, the staff places the wood to be tested 7 on the support workbench 6. The connecting spring rod 40 in the transverse groove drives the limiting side rods 38 on both sides to slide automatically towards the center to achieve initial centering. If necessary, the embedded microcontroller 14 can start the small motor to drive the small screw 37 to drive the flipping convex plate 36 to fine-tune the wood. Combined with the observation camera 41 and the marking scale 39, it is ensured that the wood is accurately positioned in the center of the workbench, thus establishing a stable benchmark for subsequent testing. If a specific humidity environment needs to be simulated, the embedded microcontroller 14 will start the humidity adjustment program. The drive motor 16 will drive the small sliding frame 15 and the dual-axis motor 17 above it to move, so that the two splicing box panels 12 are closed. The sealing plate 22 and the sealing block 20 are flipped to form a sealed cavity to wrap the wood. The humidifier or dryer in the humidity control box 21 will then work to precisely regulate the temperature and humidity inside the cavity, so that the wood can reach the moisture content balance in the simulated real environment (such as bathroom or outdoors) to evaluate the effect of humidity on its performance. After the formal pressure test begins, the equipment first performs lateral constraint. The telescopic motor 9 lifts the lifting platform 10, so that the four inflatable rubber bags 27 contact the side of the wood. The exhaust box 11 inflates the bags through the connecting air supply pipe 13 and the connecting air port 28, causing them to expand and apply uniform flexible constraint to the wood around it, simulating the lateral support in real installation. At the same time, the small telescopic rod 25 pushes the pressure fixing movable plate 26 to slide inward, externally reinforcing the inflatable rubber bags 27 to ensure the reliability of the constraint. Subsequently, the hydraulic cylinder 8 drives the upper pressure plate 29 to press down, and the edge protection strip 32 suspended from the side connecting rod 33 hangs down naturally, with its central slit 35 allowing the wood edges to be embedded. When the upper pressure plate 29 approaches the wood surface, the electric rotating shaft drives the limiting clamping rod 30 to rotate, disengaging it from the clamping rod 34. After that, the upper pressure plate 29 continues to press down to apply load, while the edge protection strip 32 remains fixed, tightly wrapping and protecting the wood edges, thereby transferring the test load completely through the upper pressure plate 29 to the core area of ​​the wood. This design effectively prevents premature damage to the edges, ensuring that the pressure data recorded by the system can truly reflect the overall compressive strength of the wood material, significantly improving the accuracy of the test and the realism of the working condition simulation.

[0021] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the compressive strength of wood-based panels, characterized in that, include: The foundation base has a central support seat on its upper surface and a top frame on its upper surface. An embedded microcontroller is mounted on one side of the top frame, and a driving hydraulic cylinder is mounted at the center of the upper surface of the top frame. Observation cameras are mounted on both sides of the top frame. A testing mechanism is also mounted on the upper surface of the foundation base. The testing mechanism includes an attachment plate assembly and a pressure plate assembly. The attachment plate assembly includes two telescopic motors, both of which are mounted on the upper surface of the foundation base. A lifting platform is mounted at the end of the output shaft of each of the two telescopic motors. The pressure plate assembly includes: an upper pressure plate, which is disposed at the end of the output shaft of the driving hydraulic cylinder; a sliding top frame is provided on each of the four side surfaces of the upper pressure plate; a side connecting support rod is provided inside the sliding top frame; a protective edge strip is provided on one side surface of each side connecting support rod; a central slit is provided on one side surface of the protective edge strip; a locking rod is provided between every two side connecting support rods; and a limiting locking rod that cooperates with the locking rod is provided on the four side surfaces of the upper pressure plate; and an electric rotating shaft is provided at the connection between the limiting locking rod and the upper pressure plate.

2. The compressive strength testing equipment for wood-based panels according to claim 1, characterized in that: The upper surface of the lifting platform is provided with four air supply boxes. One side surface of each air supply box is provided with an inflatable rubber bladder. The bottom surface of each air supply box is provided with a connecting air port, which communicates with the inside of the inflatable rubber bladder.

3. The compressive strength testing equipment for wood-based panels according to claim 2, characterized in that: The upper surface of the base plate is also provided with an exhaust box, and an air supply pipe is connected between the exhaust box and the air inlet. The upper surface of the lifting platform is also provided with four slidable pressure plates, and the upper surface of the lifting platform is also provided with multiple small telescopic rods for moving the pressure plates.

4. The compressive strength testing equipment for wood-based panels according to claim 1, characterized in that: The upper surface of the central support is provided with a bearing assembly, and the upper surface of the bearing assembly is provided with a wood detection device. The bearing assembly includes a bearing worktable, which is disposed on the upper surface of the central support. The upper surface of the bearing worktable is provided with two limiting side rods, and the upper surface of the bearing worktable is provided with a transverse groove to facilitate the sliding of the limiting side rods.

5. The compressive strength testing equipment for wood-based panels according to claim 4, characterized in that: The upper surface of the bearing worktable is also provided with marking scales. A connecting spring rod is also provided inside the transverse groove. One end of the connecting spring rod is connected to the inner side surface of the transverse groove, and the other end is connected to one side surface of the limiting side rod. The upper surface of the bearing worktable is also provided with two adjustment grooves. A flip-up convex plate is provided inside the adjustment groove. A small screw for driving the flip-up convex plate to move is also provided inside the adjustment groove. A small motor is provided at one end of the small screw.

6. The compressive strength testing equipment for wood-based panels according to claim 1, characterized in that: The testing mechanism also includes a humidity control component, which includes: an additional base plate disposed on one side surface of the base plate; a sliding platform disposed on the upper surface of the additional base plate; a drive motor disposed on one side surface of the sliding platform; the output shaft of the drive motor being located inside the sliding platform; a small sliding frame disposed on the output shaft of the drive motor; a dual-axis motor disposed on one side surface of the small sliding frame; and a meshing movable plate disposed on each of the two output shafts of the dual-axis motor.

7. The compressive strength testing equipment for wood-based panels according to claim 6, characterized in that: One side surface of the meshing movable plate is provided with a splicing box plate, and one side surface of the splicing box plate is provided with a sealing block via a rotating shaft. The upper surfaces of the two splicing box plates are each provided with a humidity control box, and the interiors of the two humidity control boxes are respectively provided with a dryer and a humidifier. One side surface of the splicing box plate is provided with a connecting shaft, and the end of the connecting shaft is provided with a flip sealing plate. Both sides of the sliding platform are provided with supporting side frames.

8. A method for testing the compressive strength of wood-based panels, used in the compressive strength testing equipment for wood-based panels as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Place the wood to be tested on the support worktable. Use the elastic force of the connecting spring rod to drive the limit rods on both sides to automatically clamp and center the wood. If necessary, the small motor can be started to drive the flip plate to finely adjust the position of the wood by observing the feedback from the camera and the marked scale. S2: If a specific humidity environment needs to be simulated, the humidity control component is activated. The drive motor and the dual-axis motor drive the two splicing box panels to close together to wrap the wood and form a sealed cavity. The humidifier or dryer in the humidity control box regulates the temperature and humidity inside the cavity to balance the wood. After completion, the box panels are opened. S3: Start the pressure resistance test program, control the two telescopic motors to lift the lifting platform so that the four inflatable rubber bags contact the side of the wood, and inflate the bags through the exhaust box and connecting air pipes to provide flexible lateral restraint. At the same time, the small telescopic rod drives the pressure plate to slide inward to reinforce the restraint mechanism. S4: Control the hydraulic cylinder to drive the upper pressure plate to press down, so that the edge protection strip wraps around the edge of the wood. When the upper pressure plate is lowered to the working position, control the electric rotating shaft to drive the limiting rod and the locking rod to disengage. Then the upper pressure plate continues to press down independently, applying vertical pressure to the wood until it is damaged, and record the pressure and displacement data of the whole process.

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