Surface flaw intelligent detection equipment and method and board quality comprehensive management system

Abstract

The invention relates to the technical field of wood board detection, in particular to intelligent surface flaw detection equipment and method and a wood board quality comprehensive management system, and the intelligent surface flaw detection equipment comprises a conveying platform, a centering mechanism, a detection mechanism, an exhaust mechanism and a pressing mechanism; the centering mechanism is used for keeping the wood plate to move along the middle of the conveying platform; the detection mechanism comprises an annular elastic reflective film, a circulating mechanism and an intelligent laser transceiving assembly, the lower surface of the annular elastic reflective film is parallel to the wood board, the circulating mechanism is used for driving the annular elastic reflective film to circulate, and the intelligent laser transceiving assembly is arranged in the annular elastic reflective film; the exhaust mechanism comprises a vacuum cover and an intermittent lifting mechanism; the intermittent lifting mechanism is used for driving the vacuum cover to be close to or away from the wood board; the number of the pressing mechanisms is two, and the two pressing mechanisms are arranged at the two ends of the conveying platform correspondingly. According to the invention, the centering mechanism, the detection mechanism and the exhaust mechanism are arranged, so that the surface of the wood board can be continuously and efficiently detected.

Description

Technical Field

[0001] The present invention relates to the technical field of wood-based panel detection, and specifically to an intelligent surface defect detection device for wood-based panels, and more specifically to a method for detecting surface defects of wood boards and a comprehensive wood board quality management system. Background Art

[0002] During the production process of wood boards, surface inspection is a key link to ensure product quality. Traditional inspection methods have problems such as complex surface defects, low recognition efficiency, and interference from complex textures. By using intelligent vision inspection technology, the inspection efficiency and accuracy can be significantly improved. The surface inspection of wood boards mainly focuses on flatness, color consistency, the presence of cracks, scratches, stains, and the clarity of the board texture.

[0003] A wood board crack detection device disclosed in a patent document with the publication number CN118150594B clamps the wood board between an elastic reflective film assembly and a vacuum detection chamber. The vacuum detection chamber adsorbs the wood board to generate negative pressure on one side of the wood board. If there is a crack on the wood board, negative pressure will also be generated at the crack position, thereby generating suction on the elastic reflective film assembly and causing local deformation of the elastic reflective film assembly. The position of the deformation is the position where the crack is located. Subsequently, a laser detection assembly is used to detect the local deformation of the elastic reflective film assembly by means of laser, and the entire wood board is detected by moving the laser detection assembly across the elastic reflective film assembly.

[0004] Although the above patent determines whether there is a crack on the wood board surface through the local deformation of the elastic reflective film assembly, when detecting a relatively long wood board, the elastic reflective film assembly needs to cover the wood board multiple times, and the elastic reflective film assembly needs time to recover after deformation. During the recovery process, the surface of the wood board cannot be detected. If the elastic reflective film assembly participates in the detection immediately without recovery, it will affect the detection result. Summary of the Invention

[0005] In view of the above problems, an intelligent surface defect detection device for wood-based panels is provided. The present invention is provided with a centering mechanism, a detection mechanism, and an exhaust mechanism, thereby realizing continuous and efficient detection of the wood board surface.

[0006] To solve the problems of the prior art, the present invention provides an intelligent surface defect detection device, which includes a conveying platform for conveying wooden boards, and also includes a centering mechanism, a detection mechanism, an exhaust mechanism and a pressing mechanism; the centering mechanism is arranged on both sides of the conveying platform, and the centering mechanism is used to keep the wooden board moving along the middle of the conveying platform; the detection mechanism is arranged above the conveying platform, and the detection mechanism includes an annular elastic reflective film, a circulation mechanism and an intelligent laser transceiver assembly. The lower surface of the annular elastic reflective film is parallel to the wooden board. The circulation mechanism is used to drive the annular elastic reflective film to rotate cyclically along its own annular closed path. The intelligent laser transceiver assembly is arranged inside the annular elastic reflective film; the exhaust mechanism is arranged below the conveying platform, and the exhaust mechanism includes a vacuum hood and an intermittent lifting mechanism. The vacuum hood is externally connected to an exhaust device, and the intermittent lifting mechanism is used to drive the vacuum hood to approach or move away from the wooden board; there are two pressing mechanisms, and the two pressing mechanisms are respectively arranged at both ends of the conveying platform.

[0007] Preferably, the intermittent lifting mechanism includes a bottom plate, two lifting components, two guiding components and an intermittent driving structure. The two lifting components are respectively arranged at both ends of the bottom plate. The lifting component includes a lifting plate and at least two connecting rods. The two connecting rods are respectively arranged at both ends of the lifting plate, and the connecting rods are connected to the vacuum hood; the two guiding components respectively correspond to the two lifting components, and the guiding components are used to limit the movement of the connecting rods; the intermittent driving structure is arranged on the bottom plate, and the intermittent driving structure is used to drive the lifting plate to lift along the axis direction of the connecting rod.

[0008] Preferably, the lifting component further includes a second spring and a limiting post; there are at least two second springs, and the two second springs are respectively sleeved on the two connecting rods. The second spring is used to apply a downward force to the connecting rod; the limiting post is arranged at the middle position of the top of the lifting plate, and the limiting post is used to limit the rising height of the lifting plate.

[0009] Preferably, the exhaust mechanism further includes two auxiliary supporting structures, and the two auxiliary supporting structures are respectively arranged on both sides of the vacuum hood. The auxiliary supporting structure is used to provide an upward supporting force for the wooden board.

[0010] Preferably, the circulation mechanism includes a second tensioning structure and a circulation driving structure; the second tensioning structure includes two side plates and at least two tensioning rollers. The two side plates are parallel to each other, the two tensioning rollers are parallel to each other, and the two ends of the tensioning roller are respectively connected to the ends of the two side plates. The annular elastic reflective film between the two tensioning rollers is parallel to the wooden board; the circulation driving structure includes a first frame, a first rotating shaft and two transmission connection structures. The two ends of the first frame are respectively connected to the two side plates, the two ends of the first rotating shaft are respectively connected to the two ends of the first frame, and the two transmission connection structures are respectively arranged at the two ends of the first rotating shaft.

[0011] Preferably, the detection mechanism further includes a lifting and adjusting mechanism, which includes a second frame and a first lifting drive structure; both ends of the second frame are connected to the conveying platform; the first lifting drive structure is arranged at the upper end of the second frame, and the first lifting structure is connected to the first frame.

[0012] Preferably, the lifting and adjusting mechanism further includes two first guiding structures, which are respectively arranged at both ends of the second frame, and the two first guiding structures are connected to both ends of the first frame.

[0013] Preferably, the centering mechanism includes two guiding structures, which are respectively arranged on both sides of the conveying platform. The guiding structure includes an annular guiding belt and two first tensioning structures, and the two first tensioning structures are respectively arranged at both ends of the annular guiding belt, and the two first tensioning structures are used to keep the annular guiding belt in a tensioned state.

[0014] Preferably, the pressing mechanism includes two mounting plates, a pressing roller and a pressing force adjusting mechanism; the two mounting plates are arranged in parallel; both ends of the pressing roller are respectively connected to the two mounting plates; the pressing force adjusting mechanism includes a second lifting drive structure and two second guiding structures. The second lifting drive structure is used to drive the two mounting plates to lift and lower, and the two second guiding structures respectively correspond to the two mounting plates, and the second guiding structures are used to limit the movement of the mounting plates.

[0015] A method for detecting surface defects of wooden boards includes the following steps:

[0016] S1, Place the wooden board on the conveying platform, and the centering mechanism limits the movement range of the wooden board to the middle of the conveying platform;

[0017] S2, The annular elastic reflective film moves synchronously with the wooden board, so that the annular elastic reflective film gradually covers part of the wooden board;

[0018] S3, The intermittent lifting mechanism pushes the vacuum cover to abut against the lower surface of the wooden board, and an external exhaust device pumps out the air in the vacuum cover. If there is a crack on the wooden board, the air above the wooden board will be sucked into the vacuum cover, and the generated suction will cause a local depression of the corresponding annular elastic reflective film. The intelligent laser transceiver component detects the surface of the wooden board by receiving the change of the optical signal;

[0019] S4, Then the wooden board moves, and the annular elastic reflective film circulates synchronously, circulating the unused part of the annular elastic reflective film to be parallel to the surface of the wooden board, and the used annular elastic reflective film returns to normal;

[0020] S5, During the process of S4, the intermittent lifting mechanism first lowers and then raises the vacuum cover, repeating S3 to continuously detect the surface of the wooden board.

[0021] Wood board quality comprehensive management system, which uses the above-mentioned intelligent surface defect detection device.

[0022] The beneficial effects of the present invention compared with the prior art are as follows:

[0023] 1. The present invention is provided with a centering mechanism, a detection mechanism and an exhaust mechanism. The centering mechanism ensures that the wood board always maintains a centered position on the conveying platform, which helps the detection mechanism to accurately dock with the wood board, prevents the offset of the wood board during the conveying process, and ensures the stability and accuracy of the detection process. The circulating mechanism drives the real-time synchronous movement of the annular elastic reflective film and the wood board, enabling continuous detection. The intelligent laser transceiver component is combined with the deformation detection of the annular elastic reflective film to achieve high-precision judgment of the defects of the wood board. The intermittent lifting mechanism flexibly controls the lifting of the vacuum hood according to the movement of the wood board and the coverage range of the annular elastic reflective film, ensuring the formation of a negative pressure environment and the effective progress of the detection. Through intermittent lifting, the exhaust volume of a single detection is reduced, and the detection speed is increased, thus realizing the continuous and efficient detection of the wood board surface.

[0024] 2. The present invention is provided with a lifting component, a guiding component and an intermittent driving structure. The intermittent driving structure drives the lifting component to perform intermittent lifting. When the wood board moves, the intermittent driving structure drives the vacuum hood to be separated from the wood board in time, providing necessary space for the smooth movement of the wood board, thus avoiding the obstruction caused by the vacuum hood to the wood board during the movement process.

[0025] 3. The present invention is provided with a second tensioning structure and a circulating driving structure. The two tensioning rollers ensure that the annular elastic reflective film is always in a tensioned state and can be parallel to the surface of the wood board. The continuous operation of the circulating driving structure can ensure that the part of the reflective film that has not participated in the detection coincides with the part of the wood board to be detected subsequently in time, while the part that has participated in the detection is separated from the wood board. This not only improves the detection efficiency but also ensures that the reflective film always maintains its best detection state during the detection process, thus ensuring the accuracy of the detection results. Description of the Drawings

[0026] Figure 1 is a three-dimensional view of an intelligent surface defect detection device.

[0027] Figure 2 is a front view of an intelligent surface defect detection device.

[0028] Figure 3 is Figure 2 a three-dimensional sectional view taken along A-A in

[0029] Figure 4 is a three-dimensional view of the wood board, the detection mechanism and the exhaust mechanism in an intelligent surface defect detection device.

[0030] Figure 5 It is a three-dimensional view of the exhaust mechanism in an intelligent surface defect detection device.

[0031] Figure 6 It is a three-dimensional view of the intermittent lifting mechanism in an intelligent surface defect detection device.

[0032] Figure 7 It is a three-dimensional view of the vacuum cover and auxiliary support structure in an intelligent surface defect detection device.

[0033] Figure 8 It is a three-dimensional view of the detection mechanism in an intelligent surface defect detection device.

[0034] Figure 9 It is a three-dimensional view of the annular elastic reflective film and circulation mechanism in an intelligent surface defect detection device.

[0035] Figure 10 It is a three-dimensional view of the first frame and lifting adjustment mechanism in an intelligent surface defect detection device.

[0036] Figure 11 It is a three-dimensional view of the wooden board, conveying platform and centering mechanism in an intelligent surface defect detection device.

[0037] Figure 12 It is a three-dimensional view of the first tensioning structure in an intelligent surface defect detection device.

[0038] Figure 13 It is a three-dimensional view of the wooden board, conveying platform and pressing mechanism in an intelligent surface defect detection device.

[0039] Figure 14 It is a three-dimensional view of the mounting plate, pressing roller and pressing force adjustment mechanism in an intelligent surface defect detection device.

[0040] The reference numerals in the figure are: 1, wooden board; 2, conveying platform; 3, centering mechanism; 31, guiding structure; 311, annular guiding belt; 312, first tensioning structure; 3121, first rectangular frame; 3122, first guiding slide bar; 3123, first moving block; 3124, first spring; 3125, rotating wheel; 4, detecting mechanism; 41, annular elastic reflective film; 42, circulating mechanism; 421, second tensioning structure; 4211, side plate; 4212, tensioning roller; 422, circulating driving structure; 4221, first frame; 4222, first rotating shaft; 4223, transmission connection structure; 4224, first rotating driver; 4225, first bevel gear set; 43, intelligent laser transceiver assembly; 44, lifting and adjusting mechanism; 441, second frame; 442, first lifting driving structure; 4421, first double-headed screw; 4422, second moving block; 4423, first driving plate; 4424, second rotating driver; 443, first guiding structure; 4431, second rectangular frame; 4432, second guiding slide bar; 4433, third moving block; 5, exhaust mechanism; 51, vacuum hood; 52, intermittent lifting mechanism; 521, bottom plate; 522, lifting component; 5221, lifting plate; 5222, connecting rod; 5223, second spring; 5224, limiting column; 523, guiding component; 5231, third frame; 5232, fixed block; 524, intermittent driving structure; 5241, cam; 5242, second rotating shaft; 5243, third rotating driver; 5244, second bevel gear set; 53, auxiliary supporting structure; 531, auxiliary roller; 532, elastic supporting component; 5321, guiding seat; 5322, third guiding slide bar; 5323, third spring; 6, pressing mechanism; 61, mounting plate; 62, pressing roller; 63, pressing force adjusting mechanism; 631, second lifting driving structure; 6311, second double-headed screw; 6312, fourth moving block; 6313, second driving plate; 6314, fourth rotating driver; 632, second guiding structure; 6321, second rectangular frame; 6322, fourth guiding slide bar. Detailed implementation manners

[0041] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation manners.

[0042] Refer to Figures 1 to 14As shown: An intelligent surface defect detection device, including a conveying platform 2 for conveying a wooden board 1, is characterized in that it further includes a centering mechanism 3, a detection mechanism 4, an exhaust mechanism 5 and a pressing mechanism 6; the centering mechanism 3 is arranged on both sides of the conveying platform 2, and the centering mechanism 3 is used to keep the wooden board 1 moving along the middle of the conveying platform 2; the detection mechanism 4 is arranged above the conveying platform 2, and the detection mechanism 4 includes an annular elastic reflective film 41, a circulation mechanism 42 and an intelligent laser transceiver assembly 43. The lower surface of the annular elastic reflective film 41 is parallel to the wooden board 1. The circulation mechanism 42 is used to drive the annular elastic reflective film 41 to circulate and rotate along its own annular closed path, and make the circulation speed of the annular elastic reflective film 41 the same as the moving speed of the wooden board 1. The intelligent laser transceiver assembly 43 is arranged inside the annular elastic reflective film 41, and the intelligent laser transceiver assembly 43 faces the lower surface of the annular elastic reflective film 41; the exhaust mechanism 5 is arranged below the conveying platform 2, and the exhaust mechanism 5 includes a vacuum hood 51 and an intermittent lifting mechanism 52. The vacuum hood 51 is externally connected to an exhaust device, and the intermittent lifting mechanism 52 is used to drive the vacuum hood 51 to approach or move away from the wooden board 1; there are two pressing mechanisms 6, and the two pressing mechanisms 6 are respectively arranged at both ends of the conveying platform 2.

[0043] The wooden board 1 moves towards the detection mechanism 4 under the action of the conveying platform 2. In order to ensure that the wooden board 1 remains centered during the detection process, the centering mechanisms 3 on both sides effectively guide the wooden board 1 to move along the center line of the conveying platform 2. As the wooden board 1 advances, the detection mechanism 4 starts to function. The detection mechanism 4 is located above the conveying platform 2. The core components of the detection mechanism 4 include an annular elastic reflective film 41, a circulation mechanism 42, and an intelligent laser transceiver assembly 43. The lower surface of the annular elastic reflective film 41 is parallel to the wooden board 1 and is driven by the circulation mechanism 42 to make the circulation speed of the annular elastic reflective film 41 consistent with the moving speed of the wooden board 1, ensuring that the corresponding positions on the wooden board 1 and the annular elastic reflective film 41 can be synchronized in real time. Below the wooden board 1, when the range covered by the annular elastic reflective film 41 on the wooden board 1 reaches the maximum coverage range of the vacuum hood 51, the intermittent lifting mechanism 52 drives the vacuum hood 51 to rise until it is in close contact with the lower surface of the wooden board 1. The external exhaust device discharges the air in the vacuum hood 51 to form a negative pressure environment. If there are cracks in the range covered by the vacuum hood 51 on the wooden board 1, greater suction will be generated at the cracks due to the negative pressure, which will cause the corresponding part of the annular elastic reflective film 41 to deform. The intelligent laser transceiver assembly 43 then accurately detects this deformation to determine whether there are defects on the wooden board 1. Once the detection of the part of the wooden board 1 corresponding to the annular elastic reflective film 41 is completed, the wooden board 1 and the annular elastic reflective film 41 will continue to move synchronously, so that the unused part on the annular elastic reflective film 41 covers the subsequent part of the wooden board 1, and the used part will have enough time to return to its original state during the movement. At the same time, the intermittent lifting mechanism 52 drives the vacuum hood 51 to descend first and then rise, repeating the above detection process, dividing the wooden board 1 into several parts for detection, reducing the exhaust volume of a single detection and improving the detection speed, thus realizing that the surface of the wooden board 1 can be continuously and efficiently detected.

[0044] Refer to Figure 4 、 Figure 5 and Figure 6As shown in the figure: The intermittent lifting mechanism 52 includes a bottom plate 521, two lifting components 522, two guiding components 523 and an intermittent driving structure 524; the two lifting components 522 are respectively arranged at both ends of the bottom plate 521, and the two lifting components 522 are respectively located at both ends of the vacuum hood 51. The lifting component 522 includes a lifting plate 5221 and at least two connecting rods 5222. The two connecting rods 5222 are respectively arranged at both ends of the lifting plate 5221, and the connecting rod 5222 is connected to the vacuum hood 51; the two guiding components 523 respectively correspond to the two lifting components 522. The guiding component 523 is used to limit the movement of the connecting rod 5222. The guiding component 523 includes a third frame 5231 and a fixing block 5232. The third frame 5231 is fixed on the bottom plate 521, the fixing block 5232 is arranged at the upper end of the third frame 5231, the connecting rod 5222 vertically passes through the fixing block 5232, and the lifting plate 5221 is located below the fixing block 5232; the intermittent driving structure 524 is arranged on the bottom plate 521. The intermittent driving structure 524 is used to drive the lifting plate 5221 to lift along the axis direction of the connecting rod 5222. The intermittent driving structure 524 includes a second rotating shaft 5242, two cams 5241, a third rotating driver 5243 and a second bevel gear set 5244. The two second cams 5241 are respectively arranged at both ends of the second rotating shaft 5242. The second rotating shaft 5242 is fixed on the bottom plate 521 through a bearing seat. The third rotating driver 5243 is arranged in the middle of the bottom plate 521. The second bevel gear set 5244 transmits the power of the third rotating driver 5243 to the second rotating shaft 5242.

[0045] When the wooden board 1 needs to move, if the vacuum hood 51 contacts the wooden board 1, it will hinder the movement of the wooden board 1. Therefore, before the wooden board 1 is about to move, the third rotating driver 5243 is started to drive the second rotating shaft 5242 to rotate. The second rotating shaft 5242 drives the two cams 5241 to rotate synchronously. When the convex end of the cam 5241 rotates downward, the vacuum hood 51 begins to move downward under the action of gravity. The vacuum hood 51 exerts a downward force on the lifting plate 5221 through the connecting rod 5222, and the connecting rod 5222 moves smoothly along its own axis under the guidance of the fixing block 5232 to ensure that the lifting plate 5221 is always in contact with the cam 5241. At this time, the vacuum hood 51 is separated from the wooden board 1, providing space for the movement of the wooden board 1. When the cam 5241 rotates one week, the subsequent part of the wooden board 1 is covered by the annular elastic reflective film 41, and at the same time the vacuum hood 51 also contacts the wooden board 1 again, thus avoiding the obstruction of the vacuum hood 51 to the wooden board 1 during the movement of the wooden board 1.

[0046] Refer to Figure 5 and Figure 6As shown: The lifting assembly 522 further includes a second spring 5223 and a limit post 5224; there are at least two second springs 5223, and the two second springs 5223 are respectively sleeved on the two connecting rods 5222. The two ends of the second spring 5223 are respectively abutted against the lifting plate 5221 and the fixed block 5232. The second spring 5223 is used to apply a downward force to the connecting rod 5222; the limit post 5224 is arranged at the middle position of the top of the lifting plate 5221, and the limit post 5224 is used to limit the rising height of the lifting plate 5221 to prevent the vacuum hood 51 from hitting the lower surface of the wooden board 1.

[0047] When the cam 5241 starts to rotate downward, due to the friction force between the connecting rod 5222 and the fixed block 5232, relying only on the acting force of the vacuum hood 51, it is difficult for the vacuum hood 51 to be separated from the wooden board 1 in time. At this time, the second spring 5223 comes into play. During the process of the vacuum hood 51 being in close contact with the wooden board 1, the second spring 5223 has been compressed to a certain extent. Once the cam 5241 starts to rotate downward, the height that the cam 5241 pushes the lifting plate 5221 to rise decreases, and the second spring 5223 quickly releases the stored energy and applies a strong downward thrust to the vacuum hood 51 to ensure that the vacuum hood 51 can be quickly and decisively separated from the wooden board 1, thereby ensuring that the vacuum hood 51 can be separated from the wooden board 1 as expected.

[0048] Refer to Figure 5 and Figure 7 As shown: The exhaust mechanism 5 further includes two auxiliary support structures 53. The two auxiliary support structures 53 are respectively arranged on both sides of the vacuum hood 51. The auxiliary support structure 53 is used to provide an upward support force for the wooden board 1. The auxiliary support structure 53 includes an auxiliary roller 531 and two elastic support components 532. The auxiliary roller 531 is arranged in parallel on one side of the vacuum hood 51. The elastic support components 532 are respectively arranged at both ends of the auxiliary roller 531. The elastic support component 532 includes a guide seat 5321, a third guide slide rod 5322 and a third spring 5323. The guide seat 5321 is fixedly arranged on the vacuum hood 51. The third guide slide rod 5322 is slidably arranged in the guide seat 5321, and the upper end of the third guide slide rod 5322 is axially connected to the auxiliary roller 531. The third spring 5323 is sleeved on the third guide slide rod 5322, and the two ends of the third spring 5323 are respectively abutted against the end of the third guide slide rod 5322 and the guide seat 5321.

[0049] During the transportation of the wooden board 1, in order to ensure that the vacuum cover 51 can smoothly contact the wooden board 1, the conveying platform 2 reserves sufficient space for the vacuum cover 51. However, this also causes the wooden board 1 to lose the support of the platform in the area close to the vacuum cover 51. When a part of the wooden board 1 is located above the vacuum cover 51, without support, the wooden board 1 is very likely to bend. Therefore, two auxiliary support structures 53 are respectively arranged on both sides of the vacuum cover 51. An upward force is exerted on the third guiding slide rod 5322 through the third springs 5323 at both ends of the auxiliary roller 531, so that the height of the auxiliary roller 531 is always kept above the upper end of the vacuum cover 51. The two auxiliary rollers 531 can effectively provide the necessary supporting force for the part of the wooden board 1 above the vacuum cover 51. When the vacuum cover 51 needs to move upward to perform the exhaust operation, the height of the auxiliary roller 531 remains unchanged, and the third springs 5323 will be gradually compressed to adapt to the upward movement of the vacuum cover 51, while ensuring that the vacuum cover 51 can closely contact the wooden board 1 to complete the exhaust task, thus effectively solving the problem of the lack of support for the wooden board 1 near the vacuum cover 51 and preventing the bending deformation of the wooden board 1.

[0050] Refer to Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown: The circulating mechanism 42 includes a second tensioning structure 421 and a circulating drive structure 422; The second tensioning structure 421 includes two side plates 4211 and at least two tensioning rollers 4212. The two side plates 4211 are parallel to each other, the two tensioning rollers 4212 are parallel to each other, and the two ends of the tensioning roller 4212 are respectively connected to the ends of the two side plates 4211. The annular elastic reflective film 41 between the two tensioning rollers 4212 is parallel to the wooden board 1; The circulating drive structure 422 includes a first frame 4221, a first rotating shaft 4222 and two transmission connection structures 4223. The two ends of the first frame 4221 are respectively connected to the two side plates 4211, the two ends of the first rotating shaft 4222 are respectively connected to the two ends of the first frame 4221, and the two transmission connection structures 4223 are respectively arranged at the two ends of the first rotating shaft 4222.

[0051] Two tension rollers 4212 keep the annular elastic reflective film 41 in a tensioned state. As a result, the annular elastic reflective film 41 can be kept parallel to the surface of the wooden board 1 to ensure the detection accuracy. When driving the annular elastic light-emitting film in a cycle, the cycle driving structure 422 operates. The first rotary driver 4224 drives the first rotating shaft 4222 to rotate through the first bevel gear set 4225. The first rotating shaft 4222 drives the two tension rollers 4212 to rotate through the two transmission connection structures 4223. The two tension rollers 4212 drive the annular elastic reflective film 41 to cycle, so that the annular elastic reflective film 41 moves synchronously with the wooden board 1. When a certain part of the annular elastic reflective film 41 participates in the detection and deforms, the annular elastic reflective film 41 needs a certain time to recover. At this time, the cycle driving structure 422 will continue to operate, driving the annular elastic reflective film 41 to cycle, so that the part of the annular elastic reflective film 41 that has not participated in the detection coincides with the part of the wooden board 1 to be detected subsequently, and the part of the annular elastic reflective film 41 that has participated in the detection and recovered is separated from the wooden board 1. During the subsequent detection time period, the annular elastic reflective film 41 can maintain its best detection state, thus ensuring the accuracy of the detection result.

[0052] Refer to Figure 3 、 Figure 4 、 Figure 8 and Figure 10 As shown: The detection mechanism 4 further includes a lifting and adjusting mechanism 44. The lifting and adjusting mechanism 44 includes a second frame 441 and a first lifting drive structure 442. The two ends of the second frame 441 are connected to the conveying platform 2. The first lifting drive structure 442 is arranged at the upper end of the second frame 441. The first lifting structure is connected to the first frame 4221 and is used to drive the first frame 4221 to lift. The first lifting drive structure 442 includes a first double-headed screw 4421, two second moving blocks 4422, two first drive plates 4423 and a second rotary driver 4424. The two second moving blocks 4422 are respectively arranged at both ends of the first double-headed screw 4421. The two first drive plates 4423 respectively correspond to the two second moving blocks 4422, and both ends of the first drive plate 4423 are pivotally connected to the second moving block 4422 and the first frame 4221 respectively. The second rotary driver 4424 is used to drive the first double-headed screw 4421 to rotate.

[0053] When the distance between the lower surface of the annular elastic reflective film 41 and the conveying platform 2 is too close, even less than the thickness of the wooden board 1, the annular elastic reflective film 41 may intrude into the moving path of the wooden board 1, causing damage to the annular elastic reflective film 41. By setting up the lifting and adjusting mechanism 44 and starting the second rotary driver 4424, the second rotary driver 4424 drives the first double-headed screw 4421 to start rotating. The two second moving blocks 4422 will approach or move away from each other according to the rotation direction of the first double-headed screw 4421. When the two second moving blocks 4422 approach each other, they will lift the first frame 4221 upward through the two first driving plates 4423, thereby driving the second tensioning structure 421 and the annular elastic reflective film 41 to rise as a whole. On the contrary, when the two second moving blocks 4422 move away from each other, they will lower the second tensioning structure 421 and the annular elastic reflective film 41 as a whole through the first frame 4221, so as to realize that the height of the annular elastic reflective film 41 can be flexibly adjusted according to actual needs, and avoid damage caused by improper height.

[0054] Refer to Figure 8 and Figure 10 As shown in: The lifting and adjusting mechanism 44 further includes two first guiding structures 443. The two first guiding structures 443 are respectively arranged at both ends of the second frame 441, and the two first guiding structures 443 are connected to both ends of the first frame 4221. The first guiding structure 443 includes a second rectangular frame 4431, a second guiding slide bar 4432 and a third moving block 4433. The second rectangular frame 4431 is fixed on the second frame 441. The two ends of the second guiding slide bar 4432 are respectively connected to the two ends of the second rectangular frame 4431. The third moving block 4433 is slidably connected to the second guiding slide bar 4432, and the third moving block 4433 is connected to the first frame 4221.

[0055] During the lifting adjustment process of the annular elastic reflective film 41, the annular elastic reflective film 41 may not be able to maintain a completely translational state, resulting in a certain angle between the lower surface of the annular elastic reflective film 41 and the wooden board 1 after the adjustment position. When the first frame 4221 is lifted or lowered under the action of the first lifting drive structure 442, the first frame 4221 will drive the connected third moving block 4433 to slide smoothly along the second guiding slide bar 4432. Since the two first guiding structures 443 are respectively arranged at both ends of the second frame 441 and are both connected to the first frame 4221, this sliding can ensure that both ends of the first frame 4221 are synchronized during the lifting process, thus avoiding the problem of distortion or inclination of the annular elastic reflective film 41 caused by asynchronous lifting.

[0056] Refer to Figure 3 、 Figure 11 and Figure 12As shown: The centering mechanism 3 includes two guiding structures 31, which are respectively arranged on both sides of the conveying platform 2. The guiding structure 31 includes an annular guiding belt 311 and two first tensioning structures 312. The two first tensioning structures 312 are respectively arranged at both ends of the annular guiding belt 311. The two first tensioning structures 312 are used to keep the annular guiding belt 311 in a tensioned state. The first tensioning structure 312 includes a first rectangular frame 3121, two first guiding slide bars 3122, a first moving block 3123, two first springs 3124 and a rotating wheel 3125. The first rectangular frame 3121 is connected to the conveying platform 2. The two first guiding slide bars 3122 are parallel to each other, and both ends of the first guiding slide bar 3122 are connected to the first rectangular frame 3121. The first moving block 3123 is slidably connected to the two first guiding slide bars 3122. The two first springs 3124 are respectively sleeved on the two first guiding slide bars 3122. The rotating wheel 3125 is axially connected to the first moving block 3123, and the annular guiding belt 311 is sleeved on the rotating wheel 3125.

[0057] The channel between the two annular guiding belts 311 is the moving channel of the wooden board 1. During the movement of the wooden board 1, both sides of the wooden board 1 are respectively in contact with the two annular guiding belts 311, and drive the annular guiding belts 311 to rotate synchronously in a cycle, avoiding friction between the edges of the wooden board 1 and the annular guiding belts 311. To keep the posture of the wooden board 1 unchanged, the two annular guiding belts 311 on both sides of the wooden board 1 need to apply the same force to the wooden board 1. Therefore, both of the two annular guiding belts 311 need to be kept in a tensioned state. The first spring 3124 applies a force to the first moving block 3123 away from the middle of the annular guiding belt 311. Therefore, the rotating wheels 3125 at both ends of the annular guiding belt 311 will respectively apply forces away from each other to both ends of the annular guiding belt 311, so that the annular guiding belt 311 is kept in a tensioned state, thus providing a stable guide for the movement of the wooden board 1 and avoiding the shaking and deviation of the wooden board 1 during the movement.

[0058] Refer to Figure 3 、 Figure 13 and Figure 14As shown in the figure: The pressing mechanism 6 includes two mounting plates 61, a pressing roller 62, and a pressing force adjusting mechanism 63; the two mounting plates 61 are arranged in parallel; both ends of the pressing roller 62 are respectively connected to the two mounting plates 61; the pressing force adjusting mechanism 63 includes a second lifting drive structure 631 and two second guiding structures 632. The second lifting drive structure 631 is used to drive the two mounting plates 61 to lift and lower. The second lifting drive structure 631 includes a second double-headed screw 6311, two fourth moving blocks 6312, two second drive plates 6313, and a fourth rotary driver 6314. The two fourth moving blocks 6312 are respectively arranged at both ends of the second double-headed screw 6311. The two second drive plates 6313 respectively correspond to the two fourth moving blocks 6312, and both ends of the second drive plate 6313 are respectively pivotally connected to the fourth moving block 6312 and the mounting plate 61. The two second guiding structures 632 respectively correspond to the two mounting plates 61. The second guiding structure 632 is used to limit the movement of the mounting plate 61. The second guiding structure 632 includes a third rectangular frame 6321 and two fourth guiding slide bars 6322. The third rectangular frame 6321 is fixed on the conveying platform 2. The two fourth guiding slide bars 6322 are arranged in parallel inside the third rectangular frame 6321. Both ends of the fourth guiding slide bar 6322 are respectively connected to both ends of the third rectangular frame 6321. The mounting plate 61 is arranged inside the third rectangular frame 6321, and both ends of the mounting plate 61 are respectively slidably connected to the two fourth guiding slide bars 6322.

[0059] During the process of the conveying platform 2 conveying the wooden board 1, if the frictional force between the wooden board 1 and the conveying platform 2 is insufficient, it may cause relative sliding between the wooden board 1 and the conveying platform 2, which will further affect the synchronous movement of the wooden board 1 and the annular elastic reflective film 41. At this time, the pressing mechanism 6 comes into play. By starting the pressing force adjusting mechanism 63, the fourth rotary driver 6314 drives the second double-headed screw 6311 to rotate, making the two fourth moving blocks 6312 move away from each other. Through the two second drive plates 6313, the two mounting plates 61 are driven to descend, so that the pressing roller 62 moves towards the conveying platform 2 and applies an appropriate pressure to the wooden board 1. This not only ensures that there is sufficient frictional force between the wooden board 1 and the conveying platform 2 but also avoids damage to the wooden board 1 caused by excessive friction. On the contrary, when it is necessary to reduce the pressure, only the rotation direction of the fourth rotary driver 6314 needs to be adjusted to make the two fourth moving blocks 6312 move closer to each other, and then the mounting plate 61 and the pressing roller 62 can be driven to rise through the second drive plate 6313 to reduce the pressure on the wooden board 1, thus realizing the precise control of the frictional force between the wooden board 1 and the conveying platform 2 and ensuring the stability and synchronism of the wooden board 1 during the conveying process.

[0060] A method for detecting surface defects of wooden boards includes the following steps:

[0061] S1. Place the wooden board 1 on the conveying platform 2, and the centering mechanism 3 restricts the movement range of the wooden board 1 to the middle of the conveying platform 2.

[0062] S2. The annular elastic reflective film 41 moves synchronously with the wooden board 1, so that the annular elastic reflective film 41 gradually covers part of the wooden board 1.

[0063] S3. The intermittent lifting mechanism 52 pushes the vacuum hood 51 to abut against the lower surface of the wooden board 1, and the external exhaust device pumps out the air in the vacuum hood 51. If there are cracks on the wooden board 1, the air above the wooden board 1 will be sucked into the vacuum hood 51, and the generated suction force will cause a local depression of the corresponding annular elastic reflective film 41. The intelligent laser transceiver component 43 detects the surface of the wooden board 1 by receiving the change of the optical signal.

[0064] S4. Then the wooden board 1 moves, and the annular elastic reflective film 41 circulates synchronously. The unused part of the annular elastic reflective film 41 is cycled to be parallel to the surface of the wooden board 1, and the used annular elastic reflective film 41 returns to normal.

[0065] S5. During the process of S4, the intermittent lifting mechanism 52 first lowers and then raises the vacuum hood 51, and repeats S3 to continuously detect the surface of the wooden board 1.

[0066] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An intelligent surface defect detection device, comprising a conveying platform (2) for conveying a wooden board (1), characterized in that: It also includes a centering mechanism (3), a detection mechanism (4), an exhaust mechanism (5) and a pressing mechanism (6); The centering mechanism (3) is arranged on both sides of the conveying platform (2), and the centering mechanism (3) is used to keep the wooden board (1) moving along the middle of the conveying platform (2); The detection mechanism (4) is arranged above the conveying platform (2), and comprises an annular elastic reflective film (41), a circulation mechanism (42) and an intelligent laser transceiver assembly (43). The lower surface of the annular elastic reflective film (41) is parallel to the wooden board (1). The circulation mechanism (42) is used to drive the annular elastic reflective film (41) to circulate along the annular closed path where the annular elastic reflective film (41) is located, and the circulation speed of the annular elastic reflective film (41) is the same as the moving speed of the wooden board (1). The intelligent laser transceiver assembly (43) is arranged inside the annular elastic reflective film (41); The exhaust mechanism (5) is arranged below the conveying platform (2), and comprises a vacuum cover (51) and an intermittent lifting mechanism (52). The vacuum cover (51) is externally connected to an exhaust device, and the intermittent lifting mechanism (52) is used to drive the vacuum cover (51) to move closer to or away from the wooden board (1). There are two clamping mechanisms (6), and the two clamping mechanisms (6) are respectively arranged at two ends of the conveying platform (2).

2. The intelligent surface defect detection device according to claim 1, characterized in that: The intermittent lifting mechanism (52) comprises a bottom plate (521), two lifting components (522), two guide components (523) and an intermittent driving structure (524); Two lifting assemblies (522) are respectively arranged at two ends of the bottom plate (521), and the lifting assemblies (522) include a lifting plate (5221) and at least two connecting rods (5222), and the two connecting rods (5222) are respectively arranged at two ends of the lifting plate (5221), and the connecting rods (5222) are connected to the vacuum cover (51); The two guide assemblies (523) correspond to the two lifting assemblies (522) respectively, and the guide assemblies (523) are used to limit the movement of the connecting rod (5222); The intermittent driving structure (524) is arranged on the bottom plate (521), and the intermittent driving structure (524) is used to drive the lifting plate (5221) to rise and fall along the axis direction of the connecting rod (5222).

3. The intelligent surface defect detection device according to claim 2, characterized in that: The lifting assembly (522) further includes a second spring (5223) and a limiting column (5224); There are at least two second springs (5223), and the two second springs (5223) are respectively sleeved on the two connecting rods (5222), and the upper second spring (5223) is used to apply a downward force to the connecting rod (5222); The limiting column (5224) is arranged at the middle position of the top of the lifting plate (5221), and the limiting column (5224) is used to limit the rising height of the lifting plate (5221).

4. The intelligent surface defect detection device according to claim 1, characterized in that: The exhaust mechanism (5) further comprises two auxiliary support structures (53), which are respectively arranged on both sides of the vacuum cover (51), and the auxiliary support structures (53) are used to provide an upward supporting force for the wooden board (1).

5. The intelligent surface defect detection device according to claim 1, characterized in that: The circulation mechanism (42) comprises a second tensioning structure (421) and a circulation driving structure (422); The second tensioning structure (421) comprises two side plates (4211) and at least two tensioning rollers (4212), the two side plates (4211) are parallel to each other, the two tensioning rollers (4212) are parallel to each other, the two ends of the tensioning rollers (4212) are respectively connected to the ends of the two side plates (4211), and the annular elastic reflective film (41) between the two tensioning rollers (4212) is parallel to the wooden board (1); The circulating driving structure (422) comprises a first frame (4221), a first rotating shaft (4222) and two transmission connection structures (4223), the two ends of the first frame (4221) are respectively connected to the two side plates (4211), the two ends of the first rotating shaft (4222) are respectively connected to the two ends of the first frame (4221), and the two transmission connection structures (4223) are respectively arranged at the two ends of the first rotating shaft (4222).

6. The intelligent surface defect detection device according to claim 5, characterized in that: The detection mechanism (4) further comprises a lifting and lowering adjustment mechanism (44), and the lifting and lowering adjustment mechanism (44) comprises a second frame (441) and a first lifting and lowering driving structure (442); Both ends of the second frame (441) are connected to the conveying platform (2); The first lifting drive structure (442) is arranged at the upper end of the second frame (441), and the first lifting structure is connected to the first frame (4221).

7. The intelligent surface defect detection device according to claim 6, characterized in that: The lifting and lowering adjustment mechanism (44) further comprises two first guide structures (443), the two first guide structures (443) are respectively arranged at two ends of the second frame (441), and the two first guide structures (443) are connected to two ends of the first frame (4221).

8. The intelligent surface defect detection device according to claim 1, characterized in that: The centering mechanism (3) comprises two guide structures (31), the two guide structures (31) are respectively arranged on both sides of the conveying platform (2), the guide structure (31) comprises an annular guide belt (311) and two first tensioning structures (312), the two first tensioning structures (312) are respectively arranged at both ends of the annular guide belt (311), and the two first tensioning structures (312) are used to keep the annular guide belt (311) in a tensioned state; The pressing mechanism (6) comprises two mounting plates (61), a pressing roller (62) and a pressing force adjustment mechanism (63); Two mounting plates (61) are arranged in parallel; The two ends of the pressing roller (62) are respectively connected to the two mounting plates (61); The pressing force adjustment mechanism (63) comprises a second lifting drive structure (631) and two second guide structures (632); the second lifting drive structure (631) is used to drive the two mounting plates (61) to lift and lower; the two second guide structures (632) correspond to the two mounting plates (61) respectively; and the second guide structures (632) are used to limit the movement of the mounting plates (61).

9. A method for detecting surface defects of a wood board, applied to the intelligent surface defect detection device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, placing the wooden board (1) on the conveying platform (2), and the centering mechanism (3) limits the moving range of the wooden board (1) to the middle of the conveying platform (2); S2, the annular elastic reflective film (41) and the wooden board (1) keep synchronous movement, so that the annular elastic reflective film (41) gradually covers part of the wooden board (1); S3, the intermittent lifting mechanism (52) pushes the vacuum cover (51) to contact the lower surface of the wooden board (1), and the external exhaust device extracts the air in the vacuum cover (51). If there is a crack on the wooden board (1), the air above the wooden board (1) will be sucked into the vacuum cover (51), and the suction force generated will cause the corresponding part of the annular elastic reflective film (41) to be concave, and the intelligent laser transceiver component (43) detects the surface of the wooden board (1) by receiving changes in the optical signal; S4, the wooden board (1) is then moved, and the annular elastic reflective film (41) is synchronously circulated, and the unused portion of the annular elastic reflective film (41) is circulated to be parallel to the surface of the wooden board (1), and the used annular elastic reflective film (41) is restored to normal; S5, during the process of S4, the intermittent lifting mechanism (52) lowers the vacuum cover (51) first and then raises it, and S3 is repeated, so that the surface of the wooden board (1) can be continuously detected.

10. The comprehensive management system for wood board quality is characterized by: The comprehensive wood board quality management system uses the surface defect intelligent detection equipment as described in any one of claims 1-8.

Images