Nondestructive testing device for shear modulus of wood and wood composite material

Abstract

The invention relates to the technical field of nondestructive testing, and discloses a wood and wood composite material shear modulus nondestructive testing device, which comprises a bottom plate, a detection box fixedly connected to the top of the bottom plate, a telescopic column slidably connected to a top slot of the detection box, a propeller fixedly connected to the top of the telescopic column, and a resistance assembly, the bottom of the inner wall of the mounting frame is fixedly connected with a base plate, the surface of the base plate is fixedly connected with a pushing ring, the two sides of the inner wall of the mounting frame are rotationally connected with a compression disc through a rotating shaft, and the end, away from the base plate, of the pushing ring is fixedly connected with the inner wall of the compression disc. Through the arrangement of the resistance assembly, the sliding speed of the sliding pipe on the surface of the sliding column can be reduced through extrusion contact of the multiple compression discs on the resistance ring, so that the scanning time of the detection mechanism on one distance of the wood surface is prolonged, and the wood scanning efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of nondestructive testing, in particular to a nondestructive testing device for shear modulus of wood and wood composite materials. Background Art

[0002] The nondestructive shear modulus testing device for wood and wood composites is a specialized device used to accurately evaluate the mechanical properties of wood and wood composites. Shear modulus is a key mechanical performance indicator during wood processing and use. It reflects the material's ability to resist shear deformation. Traditional testing methods often require destructive sampling of the material, while nondestructive testing devices can quickly and accurately obtain shear modulus data without destroying the material structure. The patent application with application number CN202310655682.9 discloses a non-destructive testing device for the shear modulus of wood and wood composite materials, including a workbench with a rotating detection mechanism arranged inside the workbench; to ensure comprehensive detection of the wood, the device drives the drive shaft to rotate through a running drive motor, and the two sets of drive shafts are connected by a conveyor belt so that the two sets of drive shafts rotate in the same direction. Under gear transmission, the two sets of drive shafts rotate in the same direction and synchronously.

[0003] However, this patent also has the following shortcomings: when testing wood and wood composite materials, the surface of the wood and wood composite materials is scanned with infrared light by manual infrared scanner, and the stability and efficiency of manual scanning are poor. The surface of the wood and wood composite materials needs to be scanned frequently to obtain complete shear modulus data. In response to this situation, a non-destructive testing device for the shear modulus of wood and wood composite materials is specially proposed. Summary of the Invention

[0004] The object of the present invention is to provide a non-destructive testing device for the shear modulus of wood and wood composite materials to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solution: a nondestructive testing device for the shear modulus of wood and wood composite materials, comprising a base plate, a testing box fixedly connected to the top of the base plate, a telescopic column slidably connected to a slot in the top of the testing box, a propeller fixedly connected to the top of the telescopic column, a telescopic mechanism provided on the bottom of the inner wall of the testing box, and further comprising: The sliding mechanism includes a sliding column fixedly connected to the surface of the pusher, a push arm slidably connected to the inner wall of the sliding column, a sliding tube fixedly connected to the top of the push arm, a resistance ring fixedly connected to the inner wall of the sliding tube, and a detection mechanism provided on the surface of the sliding tube. The sliding speed of the sliding tube on the surface of the sliding column can be reduced by the compression contact of the resistance ring by multiple compression disks; The resistance assembly includes a mounting bracket fixedly connected to the surface of the sliding column, a pad fixedly connected to the bottom of the inner wall of the mounting bracket, a push ring fixedly connected to the surface of the pad, compression disks rotatably connected to both sides of the inner wall of the mounting bracket via a rotating shaft, and an end of the push ring away from the pad fixedly connected to the inner wall of the compression disk. Multiple compression disks are installed inside the mounting bracket.

[0006] According to the above technical solution, the detection mechanism includes a telescopic frame, one end of the telescopic frame is fixedly connected to the surface of the sliding tube, a collector is plugged into the top of the telescopic frame, the inner wall of the telescopic frame is fixedly connected to the sliding frame, a propeller is slidably connected to the surface slot of the sliding frame, a sliding plate is slidably connected to the inner wall of the sliding frame, a detector is fixedly connected to the surface of the sliding plate, a buffer assembly is provided on the surface of the sliding frame, and the propeller is started to drive the telescopic block to slide left and right at the surface slot of the sliding frame.

[0007] According to the above technical solution, a telescopic block is fixedly connected to the bottom of the propulsion machine, and the telescopic block is slidably connected to the surface slot of the sliding frame. One side of the telescopic block is fixedly connected to the surface of the sliding plate. When the telescopic block slides, it drives the sliding plate to slide left and right on the inner wall of the sliding frame.

[0008] According to the above technical solution, the buffer assembly includes a mounting block, which is fixedly connected to the surface of the sliding frame, and the mounting block is fixedly connected to the inner wall of the telescopic frame. Contact arms are fixedly connected on both sides of the mounting block, and one end of the contact arm away from the mounting block is fixedly connected to a contact plate. The inner wall of the contact plate is fixedly connected to a buffer pad, and the contact plate will generate pressure on one end of the contact arm due to compression by the buffer pad.

[0009] According to the above technical solution, the telescopic mechanism includes a clamping frame, which is fixedly connected to the bottom of the inner wall of the detection box, and the inner walls of the clamping frame are fixedly connected with telescopic cavities on both sides, and the two sides of the clamping frame are fixedly connected with rotating disks, which push the covering disk inward so that the covering disk rotates on the surface of the rotating disk toward the surface of the clamping frame through the fixed frame.

[0010] The clamping assembly includes a fixed frame rotatably connected to both sides of the rotating disk via a rotating shaft, one end of the fixed frame is fixedly connected to a covering disk, both sides of the covering disk are fixedly connected to plug-in blocks, the right side of the covering disk is fixedly connected to a compression ring, the inner wall of the compression ring is slidably connected to a push rod, the left side of the covering disk is fixedly connected to a push tube, and the end of the push tube away from the covering disk is provided with an absorption assembly, which is inserted into the surface slot of the clamping frame through the plug-in block to fix the covering disk to the surface of the clamping frame.

[0011] According to the above technical solution, a plurality of air pressure balls are fixedly connected to the inner wall of the compression ring, and the propulsion tube is made of a retractable membrane material. A cavity is opened inside the propulsion tube, and by pressing the propulsion rod inward, one end of the propulsion rod is driven to retract inside the compression ring.

[0012] According to the above technical solution, the absorption component includes an absorption plate, which is fixedly connected to one end of the propulsion tube, and an adsorption plate is fixedly connected to the surface slot of the absorption plate, and the bottom of the inner wall of the absorption plate is fixedly connected to the stamping cavity, and the inner wall of the stamping cavity is slidably connected to the pressure relief tube, and the bottom of the inner wall of the absorption plate is fixedly connected to a transfer block, and the end of the transfer block away from the inner wall of the absorption plate is fixedly connected to the surface of the stamping cavity, and the top of the transfer block is fixedly connected to a stretching belt, and the end of the stretching belt away from the transfer block is fixedly connected to the surface of the pressure relief tube, and the vibration is transmitted into the stamping cavity through the transfer grooves inside the multiple transfer blocks.

[0013] According to the above technical solution, a transfer groove is provided inside the transfer block, and the transfer groove can absorb external energy and transfer it into the interior of the stretching belt, and the vibration will be transferred into the transfer block through the adsorption disk.

[0014] Compared with the prior art, the present invention provides a nondestructive testing device for the shear modulus of wood and wood composite materials, which has the following beneficial effects: 1. The present invention provides a resistance assembly. The compression contact generated by multiple compression disks on the resistance ring can reduce the sliding speed of the sliding tube on the surface of the sliding column, thereby increasing the scanning time of the detection mechanism at a certain distance on the wood surface. By providing this mechanism, the scanning efficiency of the wood can be improved and the instability of manually operating infrared scanners to scan the interior of the wood can be avoided.

[0015] 2. The present invention is provided with a detection mechanism. When the sliding piece slides downward to the inner wall of the telescopic cavity, the detector will move downward to the bottom of the wood. The infrared light emitted by the detector passes through the top slot of the telescopic cavity and irradiates the wood, thereby scanning the surface of the wood. By setting up this mechanism, the surface of the wood can be scanned in all directions without turning over the wood or wood composite material, thereby improving the detection efficiency of the wood or wood composite material.

[0016] 3. The present invention is provided with a buffer component. Due to the elasticity of the telescopic arm, one end of the contact arm will retract outward again to drive the buffer pad to contact the wood surface. The inwardly retracted buffer pad will slide on the surface of the wood. By providing this component, when performing a deep scan of the interior of the wood, when the telescopic frame slides on the wood surface, the friction of the telescopic frame on the wood surface is reduced, thereby avoiding scratches on the wood surface.

[0017] 4. The present invention is provided with a telescopic mechanism. When the pressure relief tube pops outward, it is cushioned by the elasticity of the stretch belt itself. The one-time expansion and contraction of the pressure relief tube by the stretch belt absorbs and cushions the vibration generated by the detection on the wood surface. By providing this mechanism, while adsorbing and fixing various types of wood or wood composite materials, it can also absorb the vibration generated by the wood surface during detection, thereby improving the stability of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional structural diagram of the sliding mechanism of the present invention; Figure 3 is a perspective view of the resistance assembly of the present invention; Figure 4 It is a three-dimensional diagram of the detection mechanism of the present invention; Figure 5 It is a schematic cross-sectional structural diagram of the buffer assembly of the present invention; Figure 6 It is a schematic cross-sectional view of the telescopic mechanism of the present invention; Figure 7 is a perspective view of the clamping assembly of the present invention; Figure 8 is a perspective view of the absorbent assembly of the present invention.

[0019] In the figure: 1, bottom plate; 2, detection box; 3, telescopic column; 4, pusher; 5, sliding mechanism; 501, sliding column; 502, sliding tube; 503, resistance ring; 504, resistance assembly; 5041, mounting frame; 5042, pad; 5043, push ring; 5044, compression plate; 505, push arm; 6, detection mechanism; 601, telescopic frame; 602, collector; 603, sliding frame; 604, pusher; 605, sliding piece; 606, detector; 607, buffer assembly; 6071, mounting block; 6 072. Contact arm; 6073. Contact disk; 6074. Buffer pad; 7. Telescopic mechanism; 701. Snap-fit frame; 702. Telescopic chamber; 703. Rotating disk; 704. Clamping assembly; 7041. Fixed frame; 7042. Compression ring; 7043. Push rod; 7044. Plug-in block; 7045. Covering disk; 7046. Push tube; 705. Absorption assembly; 7051. Absorption disk; 7052. Adsorption disk; 7053. Transfer block; 7054. Stamping chamber; 7055. Tensile belt; 7056. Pressure relief pipe. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] For example 1, please refer to Figure 1-Figure 3 The present invention provides a technical solution: a nondestructive testing device for the shear modulus of wood and wood composite materials, comprising a base plate 1, a test box 2 fixedly connected to the top of the base plate 1, a telescopic column 3 slidably connected to the top slot of the test box 2, and a propeller 4 fixedly connected to the top of the telescopic column 3. The propeller 4 is a corrugated telescopic device that can expand and contract along the axis and also allows a small amount of bending. It has support and guiding properties and also has protection functions such as resistance to overpressure and overtension. The bottom of the inner wall of the test box 2 is provided with a telescopic mechanism 7, and also includes: The sliding mechanism 5 includes a sliding column 501 fixedly connected to the surface of the propeller 4, and the inner wall of the sliding column 501 is slidably connected to a pushing arm 505. The top of the pushing arm 505 is fixedly connected to a sliding tube 502, and the inner wall of the sliding tube 502 is fixedly connected to a resistance ring 503. The resistance ring 503 has a telescopic characteristic and will telescope inward when its surface is pushed. A detection mechanism 6 is provided on the surface of the sliding tube 502. First, place the wood or wood composite material on the top of the telescopic cavity 702, and then start the propeller 4 to push the pushing arm 505, thereby driving the sliding tube 502 to slide to the other side on the surface of the sliding column 501.

[0022] The resistance assembly 504 includes a mounting bracket 5041 fixedly connected to the surface of the sliding column 501, a pad 5042 fixedly connected to the bottom of the inner wall of the mounting bracket 5041, a push ring 5043 fixedly connected to the surface of the pad 5042, and compression disks 5044 are rotatably connected on both sides of the inner wall of the mounting bracket 5041 through a rotating shaft. The end of the push ring 5043 away from the pad 5042 is fixedly connected to the inner wall of the compression disk 5044. When the resistance ring 503 on the inner wall of the sliding tube 502 moves to the inner wall of the mounting bracket 5041, the resistance ring 503 will be squeezed with the surface of the compression disk 5044, thereby driving the inner wall of the compression disk 5044 to flip outward. When the compression disk 5044 flips outward, the resistance ring 503 will When the surface of the compression disk 5044 continues to slide on the inner wall of the mounting frame 5041, the compression disk 5044 will continue to be pulled inward by the push ring 5043 while flipping outward, thereby flipping the compression disk 5044 to its original position. A plurality of compression disks 5044 are installed inside the mounting frame 5041. The compression disks 5044 exert pressure on the resistance ring 503, which will reduce the sliding speed of the sliding tube 502 on the surface of the sliding column 501. The plurality of compression disks 5044 in the mounting frame 5041 will reduce the speed of the sliding tube 502 while allowing the sliding tube 502 to maintain a certain sliding frequency on the surface of the sliding column 501, thereby increasing the scanning time of the detector 2 on the wood surface, thereby increasing the scanning frequency of the wood and wood composite materials.

[0023] Example 2: Based on Example 1, continue to refer to Figure 4-Figure 5 The detection mechanism 6 includes a telescopic frame 601, one end of the telescopic frame 601 is fixedly connected to the surface of the sliding tube 502, a collector 602 is plugged into the top of the telescopic frame 601, a sliding frame 603 is fixedly connected to the inner wall of the telescopic frame 601, and a propeller 604 is slidably connected to the groove on the surface of the sliding frame 603. The model of the propeller 604 is a B2F stainless steel telescope, which can be axially extended and retracted within a certain range. The inner wall of the sliding frame 603 is slidably connected to a sliding piece 605, and the surface of the sliding piece 605 is fixedly connected to a detector 606. The surface of the sliding frame 603 is provided with a buffer assembly 607. When the wood is placed on the top of the telescopic cavity 702, the sliding tube 502 slides on the surface of the sliding column 501, thereby driving the telescopic frame 601 to move to one side on the surface of the wood. When moving on the surface of the wood, the infrared light emitted by the detector 606 is scanned on the surface of the wood, and the signal is collected by the collector 602 and transmitted outward. The outwardly transmitted signal will be received by the receiver inside the propeller 4. When the propeller 4 receives the signal, it will start the telescopic device and push the telescopic column 3 downward. When the telescopic column 3 is telescoped inside the detector 2, the height of the telescopic column 3 is lowered downward so that the telescopic frame 601 contacts the surface of the wood to the bottom, thereby performing a deep scan of the inside of the wood.

[0024] The bottom of the pusher 604 is fixedly connected with a telescopic block, which is slidably connected to the surface slot of the sliding frame 603. One side of the telescopic block is fixedly connected to the surface of the sliding piece 605. When the telescopic frame 601 slides on the top of the telescopic cavity 702, the pusher 604 is started to drive the telescopic block to slide left and right at the surface slot of the sliding frame 603. When the telescopic block slides, it drives the sliding piece 605 to slide left and right on the inner wall of the sliding frame 603. When the sliding piece 605 slides down to the inner wall of the telescopic cavity 702, the detector 606 moves to the bottom to the bottom of the wood, and the infrared light emitted by the detector 606 is transmitted through the wood. The bottom of the wood is irradiated through the top slot of the telescopic cavity 702. The detector 606 is a fixed infrared light scanner: it is usually installed in a specific position. The infrared light emitted by the scanner is irradiated to the surface of the wood. The chemical bonds in the wood will absorb infrared light of a specific wavelength and produce corresponding vibration absorption peaks. The detector of the scanner will collect the signals of these absorption peaks and convert them into electrical signals and transmit them into the collector. The detector 606 that slides to the bottom can perform a full-scale scan of the surface of the wood, and there is no need to turn the wood or wood composite material over, thereby improving the detection efficiency of the wood or wood composite material.

[0025] The buffer assembly 607 includes a mounting block 6071, which is fixedly connected to the surface of the sliding frame 603, and the mounting block 6071 is fixedly connected to the inner wall of the telescopic frame 601. Contact arms 6072 are fixedly connected to both sides of the mounting block 6071, and one end of the contact arm 6072 away from the mounting block 6071 is fixedly connected to a contact plate 6073. The inner wall of the contact plate 6073 is fixedly connected to a buffer pad 6074. When the telescopic frame 601 is extended and moved downward to the surface of the wood through the telescopic column 3, the buffer pad 6074 will come into contact with the surface of the wood. When the telescopic frame 601 slides on the surface of the wood, the buffer pad 6074 will come into contact with the wood due to the contact with the wood. The surface of the wood is subjected to frictional contact, thereby expanding and contracting toward the inside of the contact disk 6073. The contact disk 6073 generates pressure on one end of the contact arm 6072 due to the compression of the buffer pad 6074, causing the contact arm 6072 to expand and contract inward. One end of the contact arm 6072 expands and contracts outward again due to the elasticity of the expansion and contraction, driving the buffer pad 6074 to contact the surface of the wood. The inwardly expanded and contracted buffer pad 6074 makes sliding contact on the surface of the wood. When the interior of the wood is deeply scanned, when the expansion and contraction frame 601 slides on the surface of the wood, the friction of the expansion and contraction frame 601 on the surface of the wood is reduced, thereby avoiding scratches on the surface of the wood.

[0026] Example 3: Based on Example 2, continue to refer to Figure 6-Figure 8The telescopic mechanism 7 includes a clamping frame 701, which is fixedly connected to the bottom of the inner wall of the detection box 2. The inner walls of the clamping frame 701 are fixedly connected with telescopic cavities 702 on both sides, and rotating disks 703 are fixedly connected on both sides of the clamping frame 701. When wood or wood composite materials are placed on the top of the telescopic cavity 702, the covering disk 7045 is pushed inward, so that the covering disk 7045 rotates on the surface of the rotating disk 703 toward the surface of the clamping frame 701 through the fixed frame 7041.

[0027] The clamping assembly 704 includes a fixed frame 7041 that is rotatably connected to both sides of the rotating disk 703 through a rotating shaft, one end of the fixed frame 7041 is fixedly connected to a covering disk 7045, and both sides of the covering disk 7045 are fixedly connected to plug-in blocks 7044, the right side of the covering disk 7045 is fixedly connected to a compression ring 7042, the inner wall of the compression ring 7042 is slidably connected to a push rod 7043, and the left side of the covering disk 7045 is fixedly connected to a push tube 7046, and the end of the push tube 7046 away from the covering disk 7045 is provided with an absorption assembly 705. When the covering disk 7045 moves to the surface of the clamping frame 701, it is inserted into the surface slot of the clamping frame 701 through the plug-in block 7044, thereby fixing the covering disk 7045 on the surface of the clamping frame 701, and then by pressing the push rod 7043 inward, one end of the push rod 7043 is driven to retract and retract inside the compression ring 7042.

[0028] A plurality of air pressure balls are fixedly connected to the inner wall of the compression ring 7042. The propulsion tube 7046 is made of a retractable membrane material. A cavity is provided inside the propulsion tube 7046. By squeezing the air pressure balls inside the compression ring 7042, the plurality of air pressure balls inside the compression ring 7042 are contracted inward and the compressed gas inside is discharged into the propulsion tube 7046. The compressed gas drives the propulsion tube 7046 to contract outward and drives the absorption plate 7051 to move to the surface of the wood, and the wood is adsorbed and fixed by the adsorption plate 7052 on the surface of the absorption plate 7051.

[0029] A transfer groove is provided inside the transfer block 7053, which can absorb external energy and transfer it into the interior of the stretching belt 7055. A transfer groove is provided inside the transfer block 7053, which can absorb external energy and transfer it into the interior of the stretching belt 7055. When the telescopic frame 601 is moved to the surface of the wood by lowering the height of the telescopic column 3, the inner wall of the telescopic frame 601 will come into contact with the surface of the wood, causing the surface of the wood to vibrate slightly, and the vibration will be transmitted into the transfer block 7053 through the adsorption plate 7052, and the vibration will be transmitted into the interior of the stamping cavity 7054 through multiple transfer grooves inside the transfer block 7053.

[0030] The absorption component 705 includes an absorption disk 7051, which is fixedly connected to one end of the propulsion tube 7046. An adsorption disk 7052 is fixedly connected to the surface slot of the absorption disk 7051. A plurality of sticky blocks are installed on the surface of the adsorption disk 7052, and the adsorption disk 7052 can be adsorbed on the surface of the wood by the sticky blocks. The bottom of the inner wall of the absorption disk 7051 is fixedly connected to the stamping cavity 7054, and the inner wall of the stamping cavity 7054 is slidably connected to the pressure relief pipe 7056. The bottom of the inner wall of the absorption disk 7051 is fixedly connected to the transfer block 7053, and the end of the transfer block 7053 away from the inner wall of the absorption disk 7051 is fixedly connected to the surface of the stamping cavity 7054. The top of the transfer block 7053 is fixedly connected to the stretching belt 7055. The stretching belt 7055 has the function of telescopic reset. The pressure relief tube 7056 that pops outward can be pulled inward by the stretching belt 7055. The end of the stretching belt 7055 away from the transmission block 7053 is fixedly connected to the surface of the pressure relief tube 7056. The vibration will cause the pressure relief tube 7056 to pop outward. When the pressure relief tube 7056 pops outward, it will be buffered by the telescopic elasticity of the stretching belt 7055 itself. The tension belt 7055 expands and contracts the pressure relief tube 7056 once, thereby absorbing and buffering the vibration generated by the detection on the wood surface. By setting up this mechanism, while adsorbing and fixing various types of wood or wood composite materials, it can also absorb the vibration generated by the detection on the wood surface, thereby improving the stability of the detection.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A nondestructive testing device for shear modulus of wood and wood composite materials, comprising a base plate (1), a testing box (2) fixedly connected to the top of the base plate (1), a telescopic column (3) slidably connected to a slot at the top of the testing box (2), a propeller (4) fixedly connected to the top of the telescopic column (3), a telescopic mechanism (7) provided at the bottom of the inner wall of the testing box (2), characterized in that: Also includes: The sliding mechanism (5) comprises a sliding column (501) fixedly connected to the surface of the propeller (4), the inner wall of the sliding column (501) is slidably connected to a push arm (505), the top of the push arm (505) is fixedly connected to a sliding tube (502), the inner wall of the sliding tube (502) is fixedly connected to a resistance ring (503), and a detection mechanism (6) is provided on the surface of the sliding tube (502). When the propeller (4) is started, the push arm (505) is pushed, thereby driving the sliding tube (502) to slide on the surface of the sliding column (501); The resistance assembly (504) includes a mounting frame (5041) fixedly connected to the surface of the sliding column (501), a pad (5042) fixedly connected to the bottom of the inner wall of the mounting frame (5041), a push ring (5043) fixedly connected to the surface of the pad (5042), and a compression disk (5044) rotatably connected to both sides of the inner wall of the mounting frame (5041) via a rotating shaft. The end of the push ring (5043) away from the pad (5042) is fixedly connected to the inner wall of the compression disk (5044). When the compression disk (5044) is turned outward, it will continue to be pulled inward by the push ring (5043) to turn the compression disk (5044) to its original position.

2. The nondestructive testing device for shear modulus of wood and wood composite materials according to claim 1, characterized in that: The detection mechanism (6) includes a telescopic frame (601), one end of the telescopic frame (601) is fixedly connected to the surface of the sliding tube (502), a collector (602) is plugged into the top of the telescopic frame (601), the inner wall of the telescopic frame (601) is fixedly connected to the sliding frame (603), a propeller (604) is slidably connected to the surface slot of the sliding frame (603), a sliding plate (605) is slidably connected to the inner wall of the sliding frame (603), a detector (606) is fixedly connected to the surface of the sliding plate (605), and a buffer component (607) is provided on the surface of the sliding frame (603). When the sliding plate (605) slides downward, the detector (606) moves to the bottom of the wood, and the infrared light emitted by the detector (606) is irradiated toward the bottom of the wood.

3. The nondestructive testing device for shear modulus of wood and wood composite materials according to claim 2, characterized in that: A telescopic block is fixedly connected to the bottom of the propulsion machine (604), and the telescopic block is slidably connected to the surface slot of the sliding frame (603). One side of the telescopic block is fixedly connected to the surface of the sliding plate (605). When the propulsion machine (604) is started, the telescopic block is driven to slide in the slot of the sliding frame (603). When the telescopic block slides, it drives the sliding plate (605) to slide on the inner wall of the sliding frame (603).

4. The nondestructive testing device for shear modulus of wood and wood composite materials according to claim 2, characterized in that: The buffer assembly (607) comprises a mounting block (6071), wherein the mounting block (6071) is fixedly connected to the surface of the sliding frame (603), and the mounting block (6071) is fixedly connected to the inner wall of the telescopic frame (601). Contact arms (6072) are fixedly connected to both sides of the mounting block (6071), and one end of the contact arm (6072) away from the mounting block (6071) is fixedly connected to a contact disk (6073). The inner wall of the contact disk (6073) is fixedly connected to a buffer pad (6074). The contact arm (6072) pops outward and drives the buffer pad (6074) to contact the surface of the wood, and the retractable buffer pad (6074) makes sliding contact on the surface of the wood.

5. The nondestructive testing device for shear modulus of wood and wood composite materials according to claim 1, characterized in that: The telescopic mechanism (7) comprises a clamping frame (701), the clamping frame (701) is fixedly connected to the bottom of the inner wall of the detection box (2), the inner walls of the clamping frame (701) are fixedly connected to telescopic cavities (702), and the two sides of the clamping frame (701) are fixedly connected to rotating disks (703), which push the covering disk (7045) inward, so that the covering disk (7045) rotates on the surface of the rotating disk (703) toward the surface of the clamping frame (701); The clamping assembly (704) comprises a fixing frame (7041) rotatably connected to both sides of the rotating disk (703) via a rotating shaft, one end of the fixing frame (7041) is fixedly connected to a covering disk (7045), both sides of the covering disk (7045) are fixedly connected to plug-in blocks (7044), the right side of the covering disk (7045) is fixedly connected to a compression ring (7042), the inner wall of the compression ring (7042) is slidably connected to a push rod (7043), and the covering disk (7045) is fixedly connected to the plug-in blocks (7044). A propulsion tube (7046) is fixedly connected to the left side of the covering disc (7045). An absorption assembly (705) is provided at one end of the propulsion tube (7046) away from the covering disc (7045). The compressed gas generated by compressing the interior of the compression ring (7042) flows into the propulsion tube (7046), drives the propulsion tube (7046) to expand and contract outward, and drives the absorption disc (7051) to move to the surface of the wood, and absorbs the wood through the absorption disc (7052) on the surface of the absorption disc (7051).

6. The nondestructive testing device for shear modulus of wood and wood composite materials according to claim 5, characterized in that: The inner wall of the compression ring (7042) is fixedly connected to a plurality of air pressure balls. The propulsion tube (7046) is made of a retractable membrane material. A cavity is provided inside the propulsion tube (7046). When the propulsion tube (7046) is extended outward, it fixes both sides of the wood or wood composite material.

7. The nondestructive testing device for shear modulus of wood and wood composite materials according to claim 5, characterized in that: The absorption assembly (705) includes an absorption disc (7051), the absorption disc (7051) is fixedly connected to one end of the propulsion tube (7046), the surface slot of the absorption disc (7051) is fixedly connected to an adsorption disc (7052), the bottom of the inner wall of the absorption disc (7051) is fixedly connected to a stamping cavity (7054), the inner wall of the stamping cavity (7054) is slidably connected to a pressure relief pipe (7056), the bottom of the inner wall of the absorption disc (7051) is fixedly connected to a transfer block (7053), and the One end of the transfer block (7053) away from the inner wall of the absorption disk (7051) is fixedly connected to the surface of the stamping cavity (7054), and a stretching belt (7055) is fixedly connected to the top of the transfer block (7053). One end of the stretching belt (7055) away from the transfer block (7053) is fixedly connected to the surface of the pressure relief pipe (7056). The pressure relief pipe (7056) is ejected outward by vibration, and when the pressure relief pipe (7056) is ejected outward, it is buffered by the elasticity of the stretching belt (7055) itself.

8. The nondestructive testing device for shear modulus of wood and wood composite materials according to claim 7, characterized in that: A transfer groove is provided inside the transfer block (7053), which can absorb external energy and transfer it into the interior of the stretching belt (7055). The vibration is transferred into the transfer block (7053) through the adsorption disk (7052). After the transfer grooves inside the multiple transfer blocks (7053) transfer the vibration into the interior of the stamping cavity (7054), they will drive the pressure relief pipe (7056) to pop outward.

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