Surface Defect Detection Device and Method Based on the Production of Waterproof Medium Density Fiberboard

Abstract

The present invention relates to the technical field of sheet defect detection, and specifically discloses a surface defect detection device and method based on the production of waterproof medium density fiberboard, including a defect detection box. A vision sensor is provided inside the defect detection box, and the vision sensor is used to identify and detect surface defects of the fiberboard to be detected. There are also a sheet feeding port and a sheet discharging port, and the sheet feeding port and the sheet discharging port are arranged on the side of the defect detection box; a first camera, the first camera is installed above the defect detection box, the recognition direction of the first camera is downward, and the first camera is used to identify the object below it; two second cameras, the two second cameras are respectively installed at the front and rear ends of the defect detection box, the recognition directions of the two second cameras are horizontal, and the second cameras are used to identify the objects within their horizontal ranges.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet defect detection, and particularly to a surface defect detection device and method based on the production of waterproof medium density fiberboard. Background Art

[0002] A surface defect detection device for waterproof medium density fiberboard is a device specifically used to detect surface defects of medium density fiberboard. It utilizes advanced image processing and machine learning technologies to automatically identify and classify various defects on the surface of the fiberboard, such as cracks, scratches, stains, uneven roughness, etc. This device plays a crucial role in the production process of waterproof medium density fiberboard, helping to ensure the consistency and stability of product quality;

[0003] When the prior art detects each surface of the sheet, it is necessary to convey the sheet to the lower part of the detection station through a conveying device, and then the detection component performs image recognition on the surface of the sheet. For example, a sheet defect detection system disclosed in the prior art publication number CN115201219A uses a transmission device to cooperate with a detection device to take pictures of different products with a camera to achieve sheet defect detection and simultaneously store data. After the detection is completed, the result of the sheet defect detection is marked by a marking displacement module, and finally the detection of processing defects existing on the metal or plastic sheet is realized. However, the problem is that when detecting the other surface of the sheet, it is necessary to take out the sheet, then turn it over and put it into the detection device for detection, which reduces the detection efficiency. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] The present invention provides a surface defect detection device and method based on the production of waterproof medium density fiberboard, which can solve the problem that the detection equipment in the prior art is not convenient to adjust the angles of the sheet. The specific solutions are as follows:

[0006] On the one hand, the present invention provides a surface defect detection device based on the production of waterproof medium density fiberboard, including a defect detection box. The interior of the defect detection box is provided with a vision sensor, which is used to identify and detect the surface defects of the fiberboard to be detected. It further includes:

[0007] A sheet inlet and a sheet outlet, which are arranged on the side surface of the defect detection box;

[0008] A first camera, the first camera is installed above the defect detection box, the recognition direction of the first camera is downward, and the first camera is used to recognize the objects below it;

[0009] Two second cameras, the two second cameras are respectively installed at the front and rear ends of the defect detection box, the recognition directions of the two second cameras are horizontal, and the second cameras are used to recognize the objects within their horizontal ranges;

[0010] A commutation component, the commutation component is used to fix the fiberboard to be detected and rotate the fiberboard to be detected inside the defect detection box, so that the four upper, lower, left, and right faces of the fiberboard to be detected can be aligned with the lower part of the first camera in sequence.

[0011] Preferably, the commutation component includes:

[0012] Two plate members, the two plate members are arranged in parallel, the two plate members are respectively arranged on the left and right sides of the fiberboard to be detected, and the two plate members are respectively arranged at the upper and lower ends of the fiberboard to be detected;

[0013] Two first rotating shafts, the two first rotating shafts are respectively fixedly connected to the adjacent ends of the two plate members, and the two plate members rotate around the central axis of the first rotating shaft;

[0014] Two fixed disks, the two fixed disks are respectively arranged at the front and rear ends of the plate member, and the front and rear ends of the first rotating shaft are respectively rotationally connected to the two fixed disks.

[0015] Preferably, it further includes:

[0016] Two first gears, the two first gears are respectively fixedly connected to the same end of the two first rotating shafts;

[0017] A second gear, the second gear is arranged between the two first gears, the second gear meshes with the two first gears respectively, when the second gear rotates, it can drive the two first gears to rotate, the second gear is rotationally installed in the middle of the fixed disk at the front end of the plate member, the fixed shaft of the second gear is rotationally connected to the front end of the defect detection box, and the fixed disk at the rear end of the plate member is rotationally connected to the rear end of the defect detection box.

[0018] Preferably, it further includes:

[0019] The first motor is fixedly installed on the front outer wall of the defect detection box. The output shaft of the first motor is connected to the fixed shaft of the second gear, and the first motor can drive the second gear to rotate.

[0020] Preferably, a second motor is installed in the middle of the fixed disk at the rear end of the plate member. The output shaft of the second motor is fixedly connected to the rear end of the fixed disk. By rotating the second motor, the whole fixed disk can be driven to rotate, and then the two plate members on the fixed disk can rotate synchronously.

[0021] Preferably, a driving assembly is provided on each of the plate members. The driving assembly includes:

[0022] Driving rollers, there are two driving rollers, and the two driving rollers are respectively arranged at both ends of the plate member;

[0023] Receiving grooves are opened at both ends of the plate member, and the driving rollers rotate in the receiving grooves;

[0024] The second rotating shaft is fixedly connected to the middle of the driving roller. Rotating holes are opened at both ends of the receiving groove, and both ends of the second rotating shaft are rotatably connected to the inside of the rotating holes.

[0025] Preferably, the driving assembly further includes:

[0026] A motor groove is opened at one end of the plate member. One end of the rotating hole penetrates to the inside of the motor groove. A third motor is fixedly installed inside the motor groove. The output shaft of the third motor is connected to one end of one of the driving rollers, and the third motor can drive the driving roller to rotate;

[0027] Sprockets are connected to both ends of the two driving rollers. The two sprockets at the adjacent ends are connected by a chain drive. A chain groove is opened in the middle of the plate member, and the chain groove penetrates to the receiving grooves at both ends of the plate member.

[0028] Preferably, a limiting assembly is further provided at one end of the plate member. The limiting assembly includes:

[0029] A sliding plate is arranged at one end of the plate member. A sliding groove is opened on one side of the plate member close to the sliding plate. The sliding plate is slidably connected to the sliding groove. A limiting groove is opened on the inner wall of the sliding groove. A limiting block is connected to one end of the sliding plate close to the limiting groove. The limiting block is slidably connected to the limiting groove;

[0030] A stop block is installed below the sliding plate;

[0031] An electric telescopic rod, the bottom of the electric telescopic rod is fixedly connected to the top of the stop block;

[0032] A rack, which is fixedly connected to the bottom of the sliding plate. A third gear is further arranged below the rack, and the third gear meshes with the rack;

[0033] A fourth motor, fixedly installed on the outer wall of the plate member. The output shaft of the fourth motor is fixedly connected to the third gear;

[0034] A rotating groove is opened on the outer wall of the plate member. The third gear is rotatably installed inside the rotating groove. A baffle is connected to the outside of the rotating groove. The output shaft of the fourth motor passes through the baffle and is connected to the third gear.

[0035] Preferably, negative pressure sleeves are arranged on one side of the two plate members close to the fiberboard to be detected. The end of the negative pressure sleeve contacts the surface of the fiberboard to be detected, so as to form a sealed space between the inner wall of the negative pressure sleeve and the outer wall of the fiberboard to be detected. And the negative pressure sleeve is supported by rubber material, the negative pressure sleeve has elasticity, exhaust holes are opened inside the negative pressure sleeve, and the exhaust holes communicate with one end of the plate member far from the fiberboard to be detected. A suction pump is fixedly installed at one end of the plate member far from the fiberboard to be detected. One end of the suction pump is connected with a suction pipe, and the other end of the suction pipe is connected with the exhaust hole.

[0036] On the other hand, the present invention provides a surface defect detection method based on the production of waterproof medium density fiberboard, including the following steps:

[0037] S1. Insert the fiberboard to be detected into the defect detection box from the plate feeding port, and the commutation component conveys the fiberboard to be detected below the first camera;

[0038] S2. The first camera detects the top surface of the fiberboard to be detected;

[0039] S3. The commutation component drives the fiberboard to be detected to rotate, so that the four upper, lower, left and right surfaces of the fiberboard to be detected are respectively aligned below the first camera;

[0040] S4. The commutation component drives the fiberboard to be detected to tilt, so that the tilting angle of the fiberboard to be detected matches the tilting angle of the plate discharging port. Under the action of gravity, the fiberboard to be detected slides out of the defect detection box from the plate discharging port to complete the detection.

[0041] Compared with the prior art, the present invention can at least achieve one of the following beneficial effects:

[0042] 1. By setting up a sheet feeding port and a sheet discharging port, it is convenient to feed and discharge the fiberboard to be detected. After the fiberboard to be detected enters through the sheet feeding port, the reversing component can convey the fiberboard to be detected to the middle position of the defect detection box, and then the visual sensor is used to detect the defects. After the detection is completed, the reversing component can adjust the tilt angle of the fiberboard to be detected, so that the fiberboard to be detected can slide out of the defect detection box along the tilt angle of the sheet discharging port.

[0043] 2. Through the reversing component inside the defect detection box, the four surfaces of the fiberboard to be detected, namely the top, bottom, left, and right, can be respectively aligned below the first camera, so as to detect the four surfaces of the fiberboard to be detected respectively, thereby achieving the purpose of efficient detection. Then, the fiberboard to be detected is discharged from the sheet discharging port through the reversing component. During the discharging process, the second camera is used to detect the defects on the front and back surfaces of the fiberboard to be detected, so as to perform a one-time detection on the fiberboard to be detected without taking it out for face-changing work in the middle. The detection efficiency is significantly improved compared with the prior art.

[0044] 3. The driving component moves the fiberboard to be detected on the plate member, which is convenient for the first camera to detect the blocked position of the fiberboard to be detected, avoiding detection dead angles and enabling a full-range detection of the fiberboard to be detected.

[0045] 4. The electric telescopic rod drives the block to move. Thus, when the two plate members are in a vertical state, the block can hold the bottom of the fiberboard to be detected, thereby preventing the fiberboard to be detected from falling and fixing the fiberboard to be detected on the reversing component.

[0046] Other features and advantages of the present invention will be described in the following description. And some of them will become obvious from the description or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the written description and the drawings. Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0048] Figure 1 is the overall three-dimensional view of the present invention;

[0049] Figure 2 is the schematic diagram of the feeding state of the fiberboard to be detected of the present invention;

[0050] Figure 3 Schematic diagram of the vertical state of the fiberboard to be detected in the present invention;

[0051] Figure 4 Schematic diagram of the discharging state of the fiberboard to be detected in the present invention;

[0052] Figure 5 Stereogram of the commutation component and the vision sensor in the present invention;

[0053] Figure 6 Exploded view of the commutation component in the present invention;

[0054] Figure 7 Exploded view of the plate member and the driving roller in the present invention;

[0055] Figure 8 Structural diagram of the driving roller in the present invention;

[0056] Figure 9 State diagram when the sliding plate extends in the present invention;

[0057] Figure 10 State diagram when the sliding plate contracts in the present invention;

[0058] Figure 11 Partial structural diagram of the sliding plate in the present invention;

[0059] Figure 12 Exploded view of the plate member and the sliding plate in the present invention;

[0060] Figure 13 Structural schematic diagram of the negative pressure sleeve in the present invention.

[0061] Among them, the reference numerals are as follows:

[0062] 101, defect detection box; 102, plate material inlet; 103, plate material outlet; 104, first camera; 105, second camera;

[0063] 200, fiberboard to be detected;

[0064] 300, commutation component;

[0065] 301, plate member; 3011, receiving groove; 3012, chain groove; 3013, motor groove; 3014, rotating hole;

[0066] 302. First rotating shaft; 303. First gear; 304. Fixed disk; 305. Second gear; 306. First motor; 307. Driving roller; 308. Second rotating shaft; 309. Third motor; 310. Sprocket; 312. Chain; 313. Sliding plate; 314. Sliding groove; 315. Limit block; 316. Limit groove; 317. Stopper; 318. Electric telescopic rod; 319. Rack; 320. Third gear; 321. Fourth motor; 322. Rotating groove; 323. Baffle; 324. Negative pressure sleeve; 325. Exhaust hole; 326. Air extraction pump; 327. Air extraction pipe; 328. Second motor. Detailed implementation manners

[0067] The following will specifically describe the preferred embodiments of the present invention in conjunction with the accompanying drawings, where the accompanying drawings form a part of the present invention and are used together with the embodiments of the present invention to explain the principles of the present invention.

[0068] Embodiment 1: As Figure 1 shown, this embodiment discloses a surface defect detection device for the production of waterproof medium-density fiberboard, which can detect the defects on the fiberboard 200 to be detected. The specific detection means is realized through a vision sensor, and specifically includes:

[0069] Defect detection box 101, and a plurality of support feet are arranged at the bottom of the defect detection box 101. Through the support feet, the defect detection box 101 is stably placed on the ground;

[0070] Sheet material inlet 102 and sheet material outlet 103, the sheet material inlet 102 and the sheet material outlet 103 are arranged on the side surface of the defect detection box 101. The sheet material inlet 102 is horizontally arranged, and the sheet material outlet 103 is inclined. By arranging the sheet material outlet 103 in an inclined manner, when the fiberboard 200 to be detected is discharged, it can naturally slide out by the action of gravity, so as to achieve the effect of smooth discharging without the need for a machine to pull it out;

[0071] First camera 104, the first camera 104 is installed above the defect detection box 101, the recognition direction of the first camera 104 is downward, and the first camera 104 is used to recognize the objects below it;

[0072] Second cameras 105, there are two second cameras 105, and the two second cameras 105 are respectively installed at the front and rear ends of the defect detection box 101. The recognition directions of the two second cameras 105 are horizontal, and the second cameras 105 are used to recognize the objects within their horizontal ranges.

[0073] As Figure 2 、 Figure 3 、 Figure 4As shown, a reversing component 300 is arranged inside the defect detection box 101. The reversing component 300 is used to fix the fiberboard 200 to be detected and rotate the fiberboard 200 to be detected inside the defect detection box 101, so that the four sides of the fiberboard 200 to be detected ( Figure 2 , Figure 3 , Figure 4 the directions shown are the front views) can be aligned with the lower part of the first camera 104 in sequence;

[0074] As Figure 5 , Figure 6 shown, the reversing component 300 includes:

[0075] Plate members 301, there are two plate members 301, the two plate members 301 are arranged in parallel, the two plate members 301 are respectively arranged on the left and right sides of the fiberboard 200 to be detected, and the two plate members 301 are respectively arranged at the upper and lower ends of the fiberboard 200 to be detected;

[0076] First rotating shafts 302, there are two first rotating shafts 302, the two first rotating shafts 302 are respectively fixedly connected to adjacent ends of the two plate members 301, and the two plate members 301 rotate with the central axis of the first rotating shaft 302 as the rotation axis;

[0077] First gears 303, there are two first gears 303, the two first gears 303 are respectively fixedly connected to the same end of the two first rotating shafts 302;

[0078] Fixed disks 304, there are two fixed disks 304, the two fixed disks 304 are respectively arranged at the front and rear ends of the plate member 301, and the front and rear ends of the first rotating shaft 302 are respectively rotatably connected to the two fixed disks 304;

[0079] Second gear 305, the second gear 305 is arranged between the two first gears 303, the second gear 305 meshes with the two first gears 303 respectively. When the second gear 305 rotates, it can drive the two first gears 303 to rotate. The second gear 305 is rotatably installed in the middle of the fixed disk 304 at the front end of the plate member 301, the fixed shaft of the second gear 305 is rotatably connected to the front end of the defect detection box 101, and the fixed disk 304 at the rear end of the plate member 301 is rotatably connected to the rear end of the defect detection box 101;

[0080] First motor 306, the first motor 306 is fixedly installed on the front outer wall of the defect detection box 101, the output shaft of the first motor 306 is connected to the fixed shaft of the second gear 305, and the first motor 306 can drive the second gear 305 to rotate;

[0081] In the above solution, the first motor 306 drives the second gear 305 to rotate, and then the second gear 305 drives the two first gears 303 to rotate. While the two first gears 303 are rotating, the two first rotating shafts 302 and the two plate members 301 also rotate accordingly. And since the two first gears 303 are meshed through the second gear 305, the two first gears 303 rotate in the same direction. Therefore, the two plate members 301 also rotate in the same direction, so that during the rotation of the two plate members 301, they always maintain a parallel state with each other. Therefore, during the rotation of the two plate members 301, the three states shown in Figure 2 , Figure 3 , Figure 4 can be generated. Figure 2 is the state when the fiberboard 200 to be detected is fed. Figure 3 is the state when the fiberboard 200 to be detected is vertical. In the vertical state, the first camera 104 can detect the left and right cross-sections of the fiberboard 200 to be detected. Figure 4 is the state when the fiberboard 200 to be detected is discharged. In the discharge state, the two plate members 301 make the fiberboard 200 to be detected in an inclined state, and the inclination angle matches the inclination angle of the plate discharge port 103, so that the detected fiberboard 200 can quickly slide out along the inclined plate discharge port 103.

[0082] As a possible embodiment, as shown in Figure 5 , a second motor 328 is installed in the middle of the fixed disk 304 at the rear end of the plate member 301. The output shaft of the second motor 328 is fixedly connected to the rear end of the fixed disk 304. By rotating the second motor 328, the whole fixed disk 304 can be driven to rotate, and then the two plate members 301 on the fixed disk 304 can be rotated synchronously, so as to achieve the effect of switching the three states shown in Figure 2 , Figure 3 , Figure 4 ;

[0083] It should be noted that when the fixed disk 304 is controlled by the second motor 328, the self-locking function of the first motor 306 is turned off, and its output shaft can rotate freely. Thus, when the two first gears 303 rotate synchronously with the fixed disk 304, the second gear 305 also rotates synchronously with the first gear 303.

[0084] As shown in Figure 7 , Figure 8 , drive assemblies are provided on both of the two plate members 301. The drive assembly includes:

[0085] There are two drive rollers 307, which are respectively arranged at the two ends of the plate 301. The plate 301 has a receiving groove 3011 at each end. The drive rollers 307 rotate in the receiving groove 3011. The middle part of the drive roller 307 is fixedly connected to the second rotating shaft 308. The receiving groove 3011 has a rotating hole 3014 at each end. The two ends of the second rotating shaft 308 are rotatably connected to the inside of the rotating hole 3014.

[0086] A motor slot 3013 is provided at one end of the plate 301. One end of the rotation hole 3014 extends into the interior of the motor slot 3013. A third motor 309 is fixedly mounted in the motor slot 3013. The output shaft of the third motor 309 is connected to one end of one of the drive rollers 307. The third motor 309 can drive the drive roller 307 to rotate.

[0087] Sprockets 310 are connected to both ends of the two driving rollers 307. The two sprockets 310 at adjacent ends are connected by a chain 312. A chain groove 3012 is defined in the middle of the plate 301. The chain groove 3012 extends through the receiving grooves 3011 at both ends of the plate 301.

[0088] In the above scheme, one of the driving rollers 307 is driven to rotate by the third motor 309, and then the two driving rollers 307 are driven by the sprocket 310 and the chain 312, so that the two driving rollers 307 at both ends of the plate 301 can rotate synchronously, thereby driving the fiberboard 200 to be detected on its surface to move on the plate 301 through the synchronous rotation of the two driving rollers 307, and the driving components on the two plates 301 at both ends of the fiberboard 200 to be detected cooperate, so that the fiberboard 200 to be detected can move on the plate 301. After the fiberboard 200 to be inspected enters the defect detection box 101, the driving component can automatically move the fiberboard 200 to the bottom of the first camera 104, and after the inspection is completed, the driving component can move the fiberboard 200 to the exit of the board discharge port 103 to complete rapid discharge, and when discharging, the front and rear end faces of the fiberboard 200 to be inspected are inspected by the two second cameras 105 at the front and rear ends of the defect detection box 101, thereby completing a full-scale inspection of the six sides of the fiberboard 200 to be inspected.

[0089] like Figure 9 、 Figure 10 As shown, a limit assembly is further provided at one end of the plate 301, and the limit assembly includes:

[0090] The sliding plate 313 is arranged at one end of the plate member 301. A sliding groove 314 is formed on the side of the plate member 301 close to the sliding plate 313. The sliding plate 313 is slidably connected to the sliding groove 314. A limiting groove 316 is formed on the inner wall of the sliding groove 314. A limiting block 315 is connected to one end of the sliding plate 313 close to the limiting groove 316. The limiting block 315 is slidably connected to the limiting groove 316;

[0091] The stop block 317 is installed below the sliding plate 313;

[0092] The electric telescopic rod 318, the bottom of the electric telescopic rod 318 is fixedly connected to the top of the stop block 317

[0093] Such as Figure 11 、 Figure 12 As shown, it further includes:

[0094] The rack 319 is fixedly connected to the bottom of the sliding plate 313. A third gear 320 is further arranged below the rack 319. The third gear 320 meshes with the rack 319;

[0095] The fourth motor 321 is fixedly installed on the outer wall of the plate member 301. The output shaft of the fourth motor 321 is fixedly connected to the third gear 320;

[0096] The rotating groove 322 is formed on the outer wall of the plate member 301. The third gear 320 is rotatably installed inside the rotating groove 322. A baffle 323 is connected to the outside of the rotating groove 322. The output shaft of the fourth motor 321 passes through the baffle 323 and is connected to the third gear 320;

[0097] In the above solution, the electric telescopic rod 318 drives the stop block 317 to move. Thus, when the two plate members 301 are in a vertical state, the bottom of the fiberboard 200 to be detected can be supported by the stop block 317, thereby preventing the fiberboard 200 to be detected from falling.

[0098] Such as Figure 13 As shown, negative pressure sleeves 324 are arranged on the sides of the two plate members 301 close to the fiberboard 200 to be detected. The ends of the negative pressure sleeves 324 are in contact with the surface of the fiberboard 200 to be detected, so as to form a sealed space between the inner wall of the negative pressure sleeve 324 and the outer wall of the fiberboard 200 to be detected. And the negative pressure sleeve 324 is made of rubber and has elasticity. An exhaust hole 325 is formed inside the negative pressure sleeve 324. The exhaust hole 325 communicates with the end of the plate member 301 away from the fiberboard 200 to be detected. A suction pump 326 is fixedly installed at the end of the plate member 301 away from the fiberboard 200 to be detected. One end of the suction pump 326 is connected to a suction pipe 327. The other end of the suction pipe 327 is connected to the exhaust hole 325;

[0099] In the above solution, when the driving components on the two plates 301 move the fiberboard 200 to be detected, in order to prevent the fiberboard 200 to be detected from falling off the ends of the two plates 301, the air extraction pump 326 is started to evacuate the negative pressure sleeve 324, so that a negative pressure is formed inside the negative pressure sleeve 324. Through the adsorption effect of the negative pressure, one side of the fiberboard 200 to be detected is adsorbed.

[0100] It should be noted that in order to prevent the adsorption force from being too large and causing the driving roller 307 to be unable to drive the fiberboard 200 to be detected to move on the plate 301, a rubber layer is connected to the surface of the driving roller 307, and through the elastic rubber layer, the friction force between the driving roller 307 and the surface of the fiberboard 200 to be detected is increased.

[0101] Embodiment 2: The technical solution of this embodiment is different from that of Embodiment 1 in that this embodiment provides a surface defect detection method based on the production of waterproof medium density fiberboard, including the following steps:

[0102] S1. Insert the fiberboard 200 to be detected into the inside of the defect detection box 101 from the plate feeding port 102, and the commutation component 300 transports the fiberboard 200 to be detected below the first camera 104.

[0103] S2. The first camera 104 detects the top surface of the fiberboard 200 to be detected.

[0104] S3. The commutation component 300 drives the fiberboard 200 to be detected to rotate, so that the four upper, lower, left and right surfaces of the fiberboard 200 to be detected are respectively aligned below the first camera 104.

[0105] S4. The commutation component 300 drives the fiberboard 200 to be detected to tilt, so that the tilting angle of the fiberboard 200 to be detected matches the tilting angle of the plate discharging port 103. Under the action of gravity, the fiberboard 200 to be detected slides out of the defect detection box 101 from the plate discharging port 103 to complete the detection.

[0106] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0107] The terms "first", "second", "third", "fourth", etc. (if any) in the description, claims, and the above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0108] In the embodiments of the present application, it is not implied that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more unless otherwise specifically and precisely defined.

[0109] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A surface defect detection device based on the production of waterproof medium density fiberboard, comprising a defect detection box (101). The interior of the defect detection box (101) is equipped with a vision sensor, which is used to identify and detect the surface defects of the fiberboard to be detected (200). The characteristics are further as follows: A sheet material inlet (102) and a sheet material outlet (103), which are arranged on the side of the defect detection box (101); A first camera (104), which is installed above the defect detection box (101). The recognition direction of the first camera (104) is downward, and the first camera (104) is used to identify the objects below it; Two second cameras (105), which are respectively installed at the front and rear ends of the defect detection box (101). The recognition directions of the two second cameras (105) are horizontal, and the second cameras (105) are used to identify the objects within their horizontal range; A commutation component (300), which is used to fix the fiberboard to be detected (200) and make the fiberboard to be detected (200) rotate inside the defect detection box (101), so that the upper, lower, left, and right four surfaces of the fiberboard to be detected (200) can be aligned with the lower part of the first camera (104) in turn; The commutation component (300) includes: Two plate members (301), which are arranged in parallel. The two plate members (301) are respectively arranged on the left and right sides of the fiberboard to be detected (200), and the two plate members (301) are respectively arranged at the upper and lower ends of the fiberboard to be detected (200); Two first rotating shafts (302), which are respectively fixedly connected to the adjacent ends of the two plate members (301). The two plate members (301) rotate around the central axis of the first rotating shaft (302); Two fixing disks (304), which are respectively arranged at the front and rear ends of the plate member (301). The front and rear ends of the first rotating shaft (302) are respectively rotationally connected to the two fixing disks (304); Two first gears (303), which are respectively fixedly connected to the same end of the two first rotating shafts (302); A second gear (305), which is arranged between the two first gears (303). The second gear (305) meshes with the two first gears (303) respectively. When the second gear (305) rotates, it can drive the two first gears (303) to rotate. The second gear (305) is rotationally installed in the middle of the fixing disk (304) at the front end of the plate member (301), and the fixed shaft of the second gear (305) is rotationally connected to the front end of the defect detection box (101). The fixing disk (304) at the rear end of the plate member (301) is rotationally connected to the rear end of the defect detection box (101).

2. The surface defect detection device based on the production of waterproof medium density fiberboard according to claim 1, characterized in that: It also includes: The first motor (306) is fixedly installed on the front outer wall of the defect detection box (101). The output shaft of the first motor (306) is connected to the fixed shaft of the second gear (305), and the first motor (306) can drive the second gear (305) to rotate.

3. The surface defect detection device based on the production of waterproof medium density fiberboard according to claim 1, characterized in that: The second motor (328) is installed in the middle of the fixed disk (304) at the rear end of the plate member (301). The output shaft of the second motor (328) is fixedly connected to the rear end of the fixed disk (304). By rotating the second motor (328), the whole fixed disk (304) can be driven to rotate, and then the two plate members (301) on the fixed disk (304) can be rotated synchronously.

4. The surface defect detection device based on the production of waterproof medium density fiberboard according to claim 1, wherein: Drive assemblies are provided on the plate members (301), and the drive assemblies include: Drive rollers (307), there are two drive rollers (307), and the two drive rollers (307) are respectively arranged at both ends of the plate member (301); Receiving grooves (3011) are opened at both ends of the plate member (301), and the drive rollers (307) rotate in the receiving grooves (3011); The second rotating shaft (308) is fixedly connected to the middle of the drive roller (307). Rotating holes (3014) are opened at both ends of the receiving groove (3011), and both ends of the second rotating shaft (308) are rotatably connected to the inside of the rotating holes (3014).

5. The surface defect detection device based on the production of waterproof medium density fiberboard according to claim 4, characterized in that: The drive assembly further includes: The motor groove (3013) is opened at one end of the plate member (301). One end of the rotating hole (3014) penetrates to the inside of the motor groove (3013). The third motor (309) is fixedly installed inside the motor groove (3013). The output shaft of the third motor (309) is connected to one end of one of the drive rollers (307), and the third motor (309) can drive the drive roller (307) to rotate; Sprockets (310) are connected to both ends of the two drive rollers (307). The two sprockets (310) at the adjacent ends are connected by a chain (312). A chain groove (3012) is opened in the middle of the plate member (301), and the chain groove (3012) penetrates to the receiving grooves (3011) at both ends of the plate member (301).

6. The surface defect detection device based on the production of waterproof medium density fiberboard according to claim 1, wherein: A limiting assembly is further provided at one end of the plate member (301), and the limiting assembly includes: The sliding plate (313) is arranged at one end of the plate member (301). A sliding groove (314) is opened on one side of the plate member (301) close to the sliding plate (313). The sliding plate (313) is slidably connected to the sliding groove (314). A limiting groove (316) is opened on the inner wall of the sliding groove (314). A limiting block (315) is connected to one end of the sliding plate (313) close to the limiting groove (316), and the limiting block (315) is slidably connected to the limiting groove (316); The stop block (317) is installed below the sliding plate (313); The electric telescopic rod (318), the bottom of the electric telescopic rod (318) is fixedly connected to the top of the stop block (317); The rack (319) is fixedly connected to the bottom of the sliding plate (313). A third gear (320) is further arranged below the rack (319), and the third gear (320) meshes with the rack (319); The fourth motor (321) is fixedly installed on the outer wall of the plate member (301), and the output shaft of the fourth motor (321) is fixedly connected to the third gear (320). The rotation groove (322) is opened on the outer wall of the plate member (301). The third gear (320) is rotatably installed inside the rotation groove (322). A baffle (323) is connected to the outside of the rotation groove (322). The output shaft of the fourth motor (321) passes through the baffle (323) and is connected to the third gear (320).

7. The surface defect detection device based on the production of waterproof medium density fiberboard according to claim 1, characterized in that: On one side of the two plate members (301) close to the fiberboard to be detected (200), a negative pressure sleeve (324) is provided. The end of the negative pressure sleeve (324) contacts the surface of the fiberboard to be detected (200), so as to form a sealed space between the inner wall of the negative pressure sleeve (324) and the outer wall of the fiberboard to be detected (200). And the negative pressure sleeve (324) is made of rubber material and has elasticity. An exhaust hole (325) is opened inside the negative pressure sleeve (324). The exhaust hole (325) communicates with one end of the plate member (301) away from the fiberboard to be detected (200). A suction pump (326) is fixedly installed at one end of the plate member (301) away from the fiberboard to be detected (200). One end of the suction pump (326) is connected to a suction pipe (327), and the other end of the suction pipe (327) is connected to the exhaust hole (325).

8. A surface defect detection method based on the production of waterproof medium density fiberboard, which uses the surface defect detection device based on the production of waterproof medium density fiberboard described in any one of claims 1-7, characterized in that, It includes the following steps: S1. Insert the fiberboard to be detected (200) into the defect detection box (101) from the sheet material inlet (102), and the commutation assembly (300) conveys the fiberboard to be detected (200) below the first camera (104). S2. The first camera (104) detects the top surface of the fiberboard to be detected (200). S3. The commutation assembly (300) drives the fiberboard to be detected (200) to rotate, so that the four upper, lower, left and right surfaces of the fiberboard to be detected (200) are respectively aligned below the first camera (104). S4. The commutation assembly (300) drives the fiberboard to be detected (200) to tilt, so that the tilting angle of the fiberboard to be detected (200) matches the tilting angle of the sheet material outlet (103). Under the action of gravity, the fiberboard to be detected (200) slides out of the defect detection box (101) from the sheet material outlet (103) to complete the detection.

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