Shaving board flatness and surface defect on-line detection device

Abstract

The invention discloses a shaving board flatness and surface defect on-line detection device, and belongs to the technical field of shaving board optical detection.The shaving board flatness and surface defect on-line detection device comprises conveying roller equipment used for conveying shaving board bodies, a driving mechanism is erected on the conveying roller equipment, and a light adjusting mechanism is arranged in an outer shell of the driving mechanism; the light adjusting mechanism comprises a mounting frame, U-shaped frames and side frames, each U-shaped frame is provided with a first rotating shaft and a second rotating shaft, the two first rotating shafts are jointly wound with a first light-transmitting belt for adjusting illumination light, and the two second rotating shafts are jointly wound with a second light-transmitting belt for adjusting light colors. The light intensity can be automatically adjusted, shaving boards of different types and different roughness degrees can be adapted, the light intensity is adjusted to resist diffuse reflection or avoid overexposure, meanwhile, light colors are changed according to the defect types of the shaving boards and the color of the board surface, defect characteristics are enhanced, interference of wood dust is isolated, and the recognition precision is improved.

Description

TECHNICAL FIELD

[0001] The application is a kind of measuring equipment characterized by optical method, more specifically belongs to the technical field of flakeboard optical detection equipment, and particularly relates to a kind of flakeboard flatness and surface defect on-line detection device. BACKGROUND

[0002] Flakeboard, also known as particle board or granular board, is a kind of commonly used artificial board material, and its core feature is to make full use of wood resources and have high cost performance. It mainly uses wood waste such as shavings, wood chips, sawdust and other wood waste generated during wood processing as the main raw material, and sometimes a small amount of plant fibers such as crop straw are added. After drying, screening and removing impurities, it is uniformly mixed with urea-formaldehyde resin, melamine resin and other adhesives, and then laid through a specific process. Finally, it is pressed at high temperature and high pressure to form a flakeboard with stable physical properties and low production cost, which is less prone to warping and deformation than solid wood boards and density boards. Therefore, it is widely used in furniture manufacturing, interior decoration and packaging materials. Some products also add moisture-proof agents and fire retardants to make moisture-proof flakeboards and fireproof flakeboards to meet the needs of special use scenarios such as humidity and high temperature.

[0003] At present, the existing flakeboard flatness and surface defect on-line detection device mainly includes a motor-driven roller conveyor assembly (to achieve continuous and uniform transmission of the board), an optical imaging mechanism composed of a fixed frame and an industrial camera (to collect the surface image of the board according to the preset parameters), an LED strip light source matched with the camera (to project light to improve the contrast of the image), and a data processing mechanism composed of a data acquisition card, an industrial computer and a detection software (to process the image and identify defects such as depressions and scratches and judge the flatness). However, the light intensity of the light source mechanism in the device is a constant value preset by the manufacturer, and cannot be automatically adjusted according to the type of the flakeboard to be detected (single-layer structure flakeboard, gradient structure flakeboard, high-density flakeboard, fireproof flakeboard and veneer flakeboard, etc.). Since the surface roughness of different types of flakeboards is different, for high-roughness flakeboards, a large amount of diffuse reflection (dispersed reflected light) will occur after light irradiation. If the light intensity is low, the image will be dark, and the details of the defects (such as depressions and impurities) will be submerged. In this case, a medium-high intensity light source is needed to enhance the total amount of reflected light and improve the contrast. For low-roughness flakeboards, light reflection is more concentrated (close to half-surface reflection), and too high intensity can easily form local reflective "white spots" on the surface, which can cover up the fine cracks or glue stains. In this case, a medium-low intensity light source is needed to reduce the reflection and highlight the defects to make up for the lack of defect recognition sensitivity and improve the detection accuracy. SUMMARY

[0004] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different approach. The optical detection of particleboard described in this invention pertains to metrological equipment that utilizes optical methods. It primarily offers an online detection device for particleboard flatness and surface defects, addressing the technical problem mentioned in the background section where existing online detection devices for particleboard flatness and surface defects cannot automatically adjust light intensity according to the type of particleboard, leading to light interference with detection accuracy.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: An online detection device for particleboard flatness and surface defects includes a conveying roller device for transporting the particleboard body. A drive mechanism is mounted on the conveying roller device. The drive mechanism includes an outer shell and a back plate. The outer shell is bolted to a bracket of the conveying roller device, and the outer shell and the back plate are detachably connected. A support frame is provided on the inner wall of the outer shell. A light adjustment mechanism is provided on the support frame. The light adjustment mechanism includes a mounting frame, two U-shaped frames, and two side frames. The U-shaped frames and side frames are all connected to the mounting frame by bolts. Each side frame is provided with four guide rollers. Every two guide rollers form a group, divided into inner and outer edge groups. Each U-shaped frame is provided with a first rotating shaft and a second rotating shaft. A first light-transmitting strip for adjusting the light intensity is wound on both first rotating shafts, and the first light-transmitting strip passes sequentially around the guide rollers at the outer edge of each side frame. A second light-transmitting strip for adjusting the light color is wound on both second rotating shafts, and the second light-transmitting strip passes sequentially around the guide rollers at the inner edge of each side frame.

[0006] Preferably, the first light-transmitting band includes, along its length, a first light intensity adjustment area, a second light intensity adjustment area, a third light intensity adjustment area, a fourth light intensity adjustment area, and a fifth light intensity adjustment area, and the light transmittance of the first light intensity adjustment area, the second light intensity adjustment area, the third light intensity adjustment area, the fourth light intensity adjustment area, and the fifth light intensity adjustment area increases sequentially.

[0007] Preferably, the second light-transmitting strip includes, along its length, a first color adjustment area, a second color adjustment area, a third color adjustment area, and a fourth color adjustment area, and the colors of the first color adjustment area, the second color adjustment area, the third color adjustment area, and the fourth color adjustment area are all different.

[0008] Preferably, the support frame includes a support part and a connecting part. The two ends of the support part are connected to the side wall of the outer shell by bolts, and the connecting part is connected to the mounting frame by bolts. A white strip light source structure and a vision sensor are provided on the lower side of the connecting part. The white strip light source structure and the vision sensor are both located on the upper side of the two light-transmitting strips and are in the same vertical plane as the two light-transmitting strips.

[0009] Preferably, a connecting shaft is provided at one end of each of the two first rotating shafts and the two second rotating shafts, and a pulley is provided on each connecting shaft. The pulleys on the two first rotating shafts are connected to each other by a belt, and the pulleys on the two second rotating shafts are also connected to each other by a belt.

[0010] Preferably, two first motors and a support frame are provided in the groove on the upper side of the support, one of the first motors is located on the support frame, and the output ends of the two first motors are connected to the corresponding connecting shafts.

[0011] Preferably, a cleaning mechanism is provided on the upper side of the connecting part. The cleaning mechanism includes a limiting frame and a top cover. The limiting frame and the top cover are detachably connected. An installation plate is bolted to one side of the outer wall of the limiting frame. A threaded column is rotatably connected inside the limiting frame. The two threaded areas on the threaded column are in opposite directions. Both threaded areas of the threaded column are provided with threaded moving blocks. Cleaning components are rotatably connected to the two moving blocks and the installation plate.

[0012] Preferably, the cleaning component includes a hollow cleaning roller, and each groove on the outer wall of the cleaning roller is provided with an elastic cleaning strip. Multiple adsorption holes are linearly arranged at equal intervals between each pair of adjacent elastic cleaning strips. A suction port is provided on the side of the cleaning roller near the limiting frame.

[0013] Preferably, a second motor is provided on the upper side of the outer wall of the outer casing, and the output end of the second motor is connected to the upper end of the threaded column.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This invention, through the arrangement of an outer shell, back plate, first motor, support frame, raised frame, connecting shaft, pulley, mounting frame, U-shaped frame, side frame, guide roller, first rotating shaft, first light-transmitting strip, first light intensity adjustment area, second light intensity adjustment area, third light intensity adjustment area, fourth light intensity adjustment area, and fifth light intensity adjustment area, achieves automatic adjustment of light intensity during the detection of particleboard flatness and surface defects, so as to adapt to different types and roughnesses of particleboard. For single-layer particleboard with rough surfaces, the fifth light intensity adjustment area with high light transmittance can be selected and moved below the light source to output high-intensity light. It resists light loss caused by diffuse reflection from wood particles, ensuring that defects such as dents and impurities form a clear grayscale difference with the background. For smooth-surfaced particleboard, the first light intensity adjustment zone with low light transmittance can be selected to output low-intensity light, avoiding overexposure caused by specular reflection and preventing defects such as scratches and bubbles from being "washed out". There is no need to manually change the light source. Simply switch different areas of the first light transmission zone to achieve light intensity adaptation, which greatly improves the compatibility of the detection device with various types of particleboard and reduces missed detections (such as missing minor defects in rough boards with low intensity) or false detections (such as misjudging the reflection of smooth boards as defects with high intensity) caused by improper light intensity, thus greatly improving the accuracy of detection.

[0015] (2) The present invention, through the setting of a first motor, support frame, raised frame, connecting shaft, pulley, mounting frame, U-shaped frame, side frame, guide roller, second rotating shaft, second light-transmitting belt, first color adjustment area, second color adjustment area, third color adjustment area and fourth color adjustment area, realizes that the light color can be changed according to the defect type and surface color of particleboard, to enhance defect characteristics and improve defect contrast. For example, the red light adjustment area is mainly used to detect internal voids and edge defects of particleboard. Utilizing the penetrability of red light, it can penetrate the surface layer and cause internal defects to form. Bright area contrast prevents internal defects from being masked by surface texture under white light. The green light adjustment area is mainly used to detect fine scratches and spots on light-colored particleboard. Green light can amplify the color gradient difference between the light-colored board surface and the defects, making light scratches appear as obvious dark lines and mold spots as clear dark spots. The contrast is significantly improved compared to white light. The blue light adjustment area is mainly used to detect defects and glue marks on dark-colored particleboard. Blue light can weaken the light absorption effect of dark board surface, making high-gloss glue marks appear as bright spots and light-colored scars as bright lines. This solves the problem of dark board defects "blending with the background" under white light and greatly improves the recognition accuracy. The light intensity adjustment of the first light-transmitting zone and the light color adjustment of the second light-transmitting zone can be synchronized. Based on the combined requirements of the particleboard's "surface roughness and defect type", a combination area of ​​"specific light transmittance and specific color" can be selected, so that the light intensity and light color are optimized in synergy. This synergistic adjustment makes the light control more in line with the actual inspection scenario of particleboard, which can match complex scenarios and take into account multiple needs. It avoids the limitations of a single light intensity or light color, reduces the frequency of equipment adjustment, greatly improves the recognition accuracy, meets the production line's "multi-variety, fast switching" requirements, efficiently improves the accuracy and continuity of inspection, and indirectly reduces production costs and quality control risks.

[0016] (3) By setting a first light-transmitting strip and a second light-transmitting strip, the present invention achieves the formation of a double-layer isolation strip between the light source and the particleboard. Combined with the material characteristics of particleboard, which is "mixed and pressed with wood chips and glue", it is very easy to generate wood chip dust during the transportation and inspection process of the production line due to vibration and surface friction. Therefore, it prevents the dust from directly adhering to the surface of the light source. Moreover, the cooperation between the limiting frame, top cover, mounting plate, threaded column, moving block, cleaning parts, cleaning roller, elastic cleaning strip, adsorption hole and suction interface can quickly adsorb the loose wood chip dust on the surface of the light-transmitting strip. At the same time, the elastic cleaning strip is used to wipe the residual dust with strong adhesion due to glue sticking. This solves the problem of light intensity attenuation caused by dust adhering to the light source. It also prevents colored wood chips (such as light brown and light yellow wood chips) from changing the original spectrum of the light source and interfering with the accuracy of light color. It ensures the purity of light color and avoids misjudging defects such as color spots and glue marks due to light color deviation. It provides a stable and accurate light environment for the detection of particleboard flatness and surface defects, and is suitable for the continuous detection needs of the production line.

[0017] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the outer shell of the present invention; Figure 3 This is a schematic diagram showing the positional relationship between the support frame and various components of the present invention; Figure 4 This is a schematic diagram showing the relationship between the white strip light source structure and the position of the vision sensor in this invention; Figure 5 This is a schematic diagram of the support frame structure of the present invention; Figure 6 This is an exploded view of the light adjustment mechanism of the present invention; Figure 7 This is a schematic diagram showing the connection between the rotating shaft and the light-transmitting strip of the present invention; Figure 8 This is a partial planar schematic diagram of the first light-transmitting band of the present invention; Figure 9 This is a partial planar schematic diagram of the second light-transmitting strip of the present invention; Figure 10 This is an exploded view of the cleaning mechanism of the present invention; Figure 11 This is an exploded view of the cleaning component of the present invention; Figure 12 This is a schematic diagram of the threaded column structure of the present invention.

[0019] In the diagram: 1. Conveying roller device; 2. Particleboard body; 3. Drive mechanism; 31. Outer shell; 32. Back plate; 33. First motor; 34. Support frame; 341. Support part; 342. Connecting part; 35. Elevating frame; 36. Second motor; 37. Connecting shaft; 38. Pulley; 4. Light adjustment mechanism; 41. Mounting frame; 42. U-shaped frame; 43. Side frame; 44. Guide roller; 45. First rotating shaft; 46. First light-transmitting strip; 461. First light intensity adjustment area; 462. Second light intensity adjustment area; 463. Third light intensity adjustment area ; 464. Fourth light intensity adjustment zone; 465. Fifth light intensity adjustment zone; 47. Second rotating shaft; 48. Second light-transmitting strip; 481. First color adjustment zone; 482. Second color adjustment zone; 483. Third color adjustment zone; 484. Fourth color adjustment zone; 5. Cleaning mechanism; 51. Limiting frame; 52. Top cover; 53. Mounting plate; 54. Threaded column; 55. Moving block; 56. Cleaning component; 561. Cleaning roller; 562. Elastic cleaning strip; 563. Suction hole; 564. Suction interface; 6. White strip light source; 7. Vision sensor. Detailed Implementation

[0020] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Example 1, please refer to the appendix for details. Figures 1-12 As shown, an online detection device for the flatness and surface defects of particleboard includes a conveying roller device 1 for transporting the particleboard body 2. A drive mechanism 3 is mounted on the conveying roller device 1. The drive mechanism 3 includes a housing 31 and a back plate 32. The housing 31 is bolted to the support of the conveying roller device 1, and the housing 31 and the back plate 32 are detachably connected. A support frame 34 is provided on the inner wall of the housing 31, and a light adjustment mechanism 4 is provided on the support frame 34. The light adjustment mechanism 4 includes a mounting frame 41, two U-shaped frames 42, and two side frames 43. The U-shaped frames 42 and the side frames 43 are all... Connected to the mounting bracket 41 by bolts, each side bracket 43 is provided with four guide rollers 44, with each pair of guide rollers 44 forming a group, divided into inner and outer groups. Each U-shaped bracket 42 is provided with a first rotating shaft 45 and a second rotating shaft 47. A first light-transmitting strip 46 for adjusting the light intensity is wound around the two first rotating shafts 45, and the first light-transmitting strip 46 passes around the guide rollers 44 at the outer edge of each side bracket 43 in sequence. A second light-transmitting strip 48 for adjusting the light color is wound around the two second rotating shafts 47, and the second light-transmitting strip 48 passes around the guide rollers 44 at the inner edge of each side bracket 43 in sequence.

[0024] Through the above structure, the light intensity can be automatically adjusted during the detection of particleboard flatness and surface defects to adapt to different types and roughnesses of particleboard. Adjusting the light intensity counteracts diffuse reflection or avoids overexposure, effectively reducing the probability of missed or false detections. At the same time, the light color can be changed according to the type of particleboard defect and the color of the board surface to enhance defect features and improve defect contrast. For example, green light reveals fine marks on light-colored boards, blue light reveals glue marks on dark-colored boards, and red light detects internal hidden dangers and edge defects, greatly improving the recognition accuracy. Moreover, the two can work together to match complex scenarios, meet multiple needs, reduce the frequency of adjustment, meet the "multi-variety, fast switching" requirements of the production line, and efficiently improve the accuracy and continuity of detection, indirectly reducing production costs and quality control risks. In addition, it can effectively isolate wood dust during the particleboard moving detection process, preventing dust from covering the light source and affecting the detection accuracy.

[0025] The specific operation is as follows: When the conveyor roller device 1 transports the particleboard body 2 to below the vision sensor 7, based on factors such as the type of particleboard, surface roughness, and board color, two first motors 33 are activated. Subsequently, the two first motors 33 drive the corresponding first rotating shaft 45 and second rotating shaft 47 to rotate via the connecting shaft 37, thereby changing the light intensity adjustment area of ​​the first light-transmitting strip 46 and the color adjustment area of ​​the second light-transmitting strip 48 located below the white strip light source 6. This allows the appropriate light intensity adjustment area and color adjustment area to be combined, improving the detection progress. When the wood dust on the particleboard adheres to the two light-transmitting strips, the second motor 36 starts, driving the screw... As the threaded column 54 rotates, the two sections of thread on the threaded column 54 have opposite directions. Consequently, the two moving blocks 55 drive the corresponding cleaning components 56 to move towards the middle cleaning component 56, thereby clamping the two light-transmitting strips between the three cleaning components 56. As the first motor 33 drives the first rotating shaft 45 and the second rotating shaft 47 to rotate through the connecting shaft 37, the cleaning component 56 and the light-transmitting strip are rotatably connected. The air pump connected to the suction port 564 runs (the air pump is existing equipment and is not shown in the diagram). Negative pressure is generated inside the cleaning roller 561, which sucks in the wood dust through the suction hole 563. At the same time, the wiping of the elastic cleaning strip 562 further improves the adsorption effect.

[0026] Example 2, please refer to the appendix for details. Figures 4-9As shown, the first light-transmitting band 46 includes, along its length, a first light intensity adjustment area 461, a second light intensity adjustment area 462, a third light intensity adjustment area 463, a fourth light intensity adjustment area 464, and a fifth light intensity adjustment area 465, wherein the first light intensity adjustment area 461 (20% transmittance), the second light intensity adjustment area 462 (40% transmittance), the third light intensity adjustment area 463 (60% transmittance), the fourth light intensity adjustment area 464 (80% transmittance), and the fifth light intensity adjustment area 465 (100% transmittance) are respectively. The light transmittance increases sequentially. The second light-transmitting band 48 includes, along its length, a first color adjustment area 481, a second color adjustment area 482, a third color adjustment area 483, and a fourth color adjustment area 484. The colors of the first color adjustment area 481, the second color adjustment area 482, the third color adjustment area 483, and the fourth color adjustment area 484 are all different. The colors of the first color adjustment area 481, the second color adjustment area 482, the third color adjustment area 483, and the fourth color adjustment area 484 are transparent, red, green, and blue, respectively. The transparent color allows complete transmission of white light from the light source. The support frame 34 includes a support part 341 and a connecting part 342. The two ends of the support part 341 are connected to the side wall of the outer casing 31 by bolts. The connecting part 342 is connected to the mounting frame 41 by bolts. A white strip light source 6 structure and a vision sensor 7 are provided on the lower side of the connecting part 342. 7 are located on the upper side of the two light-transmitting strips and are in the same vertical plane as the two light-transmitting strips. The visual sensor 7 is used to detect defects in the particleboard. One end of each of the two first rotating shafts 45 and the two second rotating shafts 47 is provided with a connecting shaft 37. Each connecting shaft 37 is provided with a pulley 38. The pulleys 38 on the two first rotating shafts 45 are connected by a belt, and the pulleys 38 on the two second rotating shafts 47 are also connected by a belt. Two first motors 33 and a support frame 35 are provided in the groove on the upper side of the support part 341. One of the first motors 33 is located on the support frame 35, and the output ends of the two first motors 33 are connected to the corresponding connecting shafts 37. Through the cooperation between the first motors 33, the connecting shafts 37, the first rotating shafts 45 and the second rotating shafts 47, the two light-transmitting strips are wound up and opened, thereby changing the light intensity and color below the white strip light source 6.

[0027] Example 3, please refer to the appendix for details. Figure 2 and attached Figures 10-12As shown, a cleaning mechanism 5 is provided on the upper side of the connecting part 342. The cleaning mechanism 5 includes a limiting frame 51 and a top cover 52, which are detachably connected. A mounting plate 53 is bolted to one side of the outer wall of the limiting frame 51. A threaded column 54 is rotatably connected inside the limiting frame 51, and the two threaded areas on the threaded column 54 are in opposite directions. Each of the two threaded areas of the threaded column 54 is provided with a threaded moving block 55. Cleaning components 56 are rotatably connected to both moving blocks 55 and the mounting plate 53. A second motor 36 is provided on the upper side of the outer wall of the outer shell 31. The output end of the second motor 36 is connected to the upper end of the threaded column 54 via a threaded connection. The cooperation between column 54, second motor 36, and moving block 55 enables the two cleaning components 56 to move towards the center, so that the three cleaning components 56 come into contact with the two light-transmitting strips. Each cleaning component 56 includes a hollow cleaning roller 561. Each groove on the outer wall of the cleaning roller 561 is provided with an elastic cleaning strip 562. Multiple adsorption holes 563 are linearly arranged at equal intervals between each pair of adjacent elastic cleaning strips 562. A suction port 564 is provided on the side of the cleaning roller 561 near the limiting frame 51. Through the cooperation between the elastic cleaning strips 562, the adsorption holes 563, and the suction port 564, the sawdust on the two light-transmitting strips is sucked up, avoiding affecting the detection accuracy.

[0028] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A device for online detection of flatness and surface defects of particle board, comprising a conveying roller device (1) for transporting a particle board body (2), a driving mechanism (3) being arranged on the conveying roller device (1), the driving mechanism (3) comprising an outer housing (31) and a back plate (32), the outer housing (31) being bolted on a support of the conveying roller device (1), and the outer housing (31) and the back plate (32) being detachably connected, characterized in that The inner wall of the outer shell (31) is provided with a support frame (34), the support frame (34) is provided with a light adjusting mechanism (4), the light adjusting mechanism (4) comprises a mounting frame (41), two U-shaped frames (42) and two side frames (43), the U-shaped frames (42) and the side frames (43) are connected with the mounting frame (41) through bolts, four guide rollers (44) are arranged on each side frame (43), every two guide rollers (44) form a group and are divided into two groups of inner and outer edges, a first rotating shaft (45) and a second rotating shaft (47) are arranged on each U-shaped frame (42), a first light transmission belt (46) for adjusting light is wound on the two first rotating shafts (45), and the first light transmission belt (46) sequentially passes through the guide rollers (44) at the outer edge position of each side frame (43); and a second light transmission belt (48) for adjusting light color is wound on the two second rotating shafts (47), and the second light transmission belt (48) sequentially passes through the guide rollers (44) at the inner edge position of each side frame (43).

2. A device for online detection of flatness and surface defects of a particle board according to claim 1, characterized in that, The first light transmission belt (46) sequentially comprises a first light intensity adjusting area (461), a second light intensity adjusting area (462), a third light intensity adjusting area (463), a fourth light intensity adjusting area (464) and a fifth light intensity adjusting area (465) in the length direction, and the light transmission rates of the first light intensity adjusting area (461), the second light intensity adjusting area (462), the third light intensity adjusting area (463), the fourth light intensity adjusting area (464) and the fifth light intensity adjusting area (465) increase one by one.

3. The device according to claim 1, wherein The second light transmission belt (48) sequentially comprises a first color adjusting area (481), a second color adjusting area (482), a third color adjusting area (483) and a fourth color adjusting area (484) in the length direction, and the colors of the first color adjusting area (481), the second color adjusting area (482), the third color adjusting area (483) and the fourth color adjusting area (484) are different.

4. The device for online detection of flatness and surface defects of particle board according to claim 1, characterized in that, The support frame (34) comprises a support part (341) and a connecting part (342), the two ends of the support part (341) are connected with the side wall of the outer shell (31) through bolts, the connecting part (342) is connected with the mounting frame (41) through bolts, the lower side of the connecting part (342) is provided with a white strip-shaped light source (6) structure and a visual sensor (7), the white strip-shaped light source (6) structure and the visual sensor (7) are located on the upper sides of the two light transmission belts and are in the same vertical plane with the two light transmission belts.

5. The device for online detection of flatness and surface defects of particle board according to claim 1, characterized in that, One end of the two first rotating shafts (45) and the two second rotating shafts (47) is provided with a connecting shaft (37), a belt pulley (38) is arranged on each connecting shaft (37), the belt pulleys (38) on the two first rotating shafts (45) are connected through a belt, and the belt pulleys (38) on the two second rotating shafts (47) are also connected through a belt.

6. A device for online detection of flatness and surface defects of a particle board according to claim 4, characterized in that, Two first motors (33) and a pad frame (35) are arranged in the recess on the upper side of the support part (341), one of the first motors (33) is located on the pad frame (35), and the output ends of the two first motors (33) are connected with corresponding connecting shafts (37).

7. A device for on-line detection of flatness and surface defects of particle board according to claim 4, characterized in that, A cleaning mechanism (5) is arranged on the upper side of the connecting part (342), the cleaning mechanism (5) comprises a limiting frame (51) and a top cover (52), and the limiting frame (51) and the top cover (52) are detachably connected, a mounting plate (53) is connected on one side of the outer wall of the limiting frame (51) through bolts, a threaded column (54) is rotatably connected in the limiting frame (51), the directions of the two threaded regions on the threaded column (54) are opposite, threaded moving blocks (55) are arranged on the two threaded regions of the threaded column (54), and cleaning pieces (56) are rotatably connected on the mounting plate (53) and the two moving blocks (55).

8. A device for online detection of flatness and surface defects of particle board according to claim 7, characterized in that, The cleaning piece (56) comprises an internally hollow cleaning roller (561), elastic cleaning strips (562) are arranged in the recess on the outer wall of the cleaning roller (561), a plurality of adsorption holes (563) are linearly arranged at equal intervals between every two adjacent elastic cleaning strips (562), and a suction interface (564) is arranged on the side of the cleaning roller (561) close to the limiting frame (51).

9. The device for online detection of flatness and surface defects of particle board according to claim 4, characterized in that, A second motor (36) is arranged on the upper side of the outer shell (31), and the output end of the second motor (36) is connected with the upper end of the threaded column (54).

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