Wood surface defect detection device based on wood science and engineering

Abstract

The invention relates to a wood detection device, belongs to the technical field of wood processing, and particularly relates to a wood surface defect detection device based on wood science and engineering, the wood surface defect detection device comprises a conveying device, the conveying device is composed of a mounting frame, a driving roller, a conveying belt and a driving motor, and the top of the conveying device is provided with a detection assembly; a shielding assembly is arranged in the detection box; a dust removal assembly is arranged at the top of the conveying device. According to the wood surface cleaning device, wood needing to be detected is conveyed through the conveying device, the pressing roller is driven to rotate through movement of the wood, the cleaning rod synchronously rotates along with the pressing roller under driving of the driving belt, and therefore the cleaning rod can clean the surface of the wood and clean dust on the surface of the wood; dust cleaned by the cleaning rod is sucked away, and the situation that the dust is attached to the surface of the wood and influences the measurement result is avoided; the problem that dust on the surface of existing timber affects the detection result is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wood processing, and particularly to a wood surface defect detection device based on wood science and engineering. Background Art

[0002] During the production process of wood materials, due to uncontrollable factors existing in raw materials, adhesives and certain links in the production process, it is inevitable that defects such as large wood shavings, glue spots, sundries, oil stains, and small pits will appear on the surface of the board. The occurrence of surface defects of the board will cause a reduction in the quality of the board and a decline in the grade, seriously affecting the aesthetic degree of the downstream products of the wood-based board, and at the same time causing greater economic losses to the manufacturer.

[0003] After retrieval, a Chinese patent with the publication number CN111307824A discloses a wood-based board surface pit defect detection device, belonging to the field of wood detection. The device includes a horizontal conveyor table, a height-adjustable light-shielding baffle is vertically arranged above the conveyor table, a linear light source is arranged on one side of the light-shielding baffle, a camera is arranged on the other side, the light-emitting direction of the linear light source faces the bottom of the light-shielding baffle, the linear light source and the lens of the camera are arranged in a dark box, and the camera is connected to a computer; this invention can solve the problem that small pit defects on the surface of wood-based boards cannot be automatically identified in the prior art. After further combining with the prior art to identify other defects of the board, by applying this detection device, the purpose of automatically identifying surface defects of boards on the industrial production line can be achieved.

[0004] In the above prior art solution, the wood material is sent into the interior of the detection box through a conveying device. However, during the transportation process of the wood material, dust may fall on the surface of the wood material, resulting in the detection component misjudging the dust as a depression when scanning the wood material, thereby affecting the accuracy of the detection result. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention proposes a wood surface defect detection device based on wood science and engineering. Through the cleaning rod, the surface of the wood material can be cleaned, and the dust on the surface of the wood material can be cleaned. Through the operation of the fan, the dust cleaned by the cleaning rod is sucked away, avoiding the situation that the surface of the wood material is attached with dust and affecting the measurement result.

[0006] The technical solution for achieving the purpose of the present invention is: a wood surface defect detection device based on wood science and engineering, including a conveying device, the conveying device is composed of a mounting frame, a driving roller, a conveyor belt and a driving motor, and a detection component is arranged on the top of the conveying device, and the detection component includes;

[0007] A detection box and a mounting rod. The detection box is fixedly installed on the top wall surface of the mounting frame of the conveying device. Through slots are provided on the front and rear side wall surfaces of the detection box. The mounting rod is fixedly installed on the top end of the inner side wall of the detection box;

[0008] A camera and a light source, which are used to detect defects on the surface of the wood;

[0009] A shielding component is arranged inside the detection box. The shielding component includes;

[0010] A folding cloth and a shielding curtain, which are used to reduce the brightness inside the detection box;

[0011] A mounting strip and a compression spring. The mounting strip is fixedly installed on the bottom wall surface of the folding cloth. The compression spring is used to ensure that the mounting strip extends downward;

[0012] A pressing roller and a connecting shaft. The pressing roller is located inside the mounting strip. The connecting shaft is used to rotatably mount the pressing roller inside the mounting strip;

[0013] A dust removal component is arranged on the top of the conveying device. The dust removal component includes;

[0014] A dust removal box and a fan. The dust removal box is fixedly installed on the top wall surface of the detection box. The fan is fixedly installed inside the dust removal box;

[0015] A connecting hose and a shielding cover. The shielding cover is fixedly installed on the side wall of the mounting strip. The connecting hose is used to connect the shielding cover with the input end of the fan;

[0016] A cleaning rod, a positioning rod and a rotating shaft. The cleaning rod is arranged inside the shielding cover. The positioning rod is used to position the cleaning rod. The rotating shaft is used to rotatably mount the cleaning rod on the side wall of the positioning rod;

[0017] A driving belt is sleeved on the side walls of the connecting shaft and the rotating shaft.

[0018] In some embodiments, a rubber ring is sleeved on the side wall of the pressing roller, and bristles are laid on the side wall of the cleaning rod.

[0019] In some embodiments, the shielding component further includes;

[0020] An adjusting screw and an adjusting nut. The adjusting screw is rotatably installed on the top wall surface of the mounting strip, and the top end of the adjusting screw slides through the inside of the detection box. The adjusting nut is threadedly installed on the top end side wall of the adjusting screw.

[0021] In some embodiments, a wind guiding component is arranged on the top of the conveying device. The wind guiding component includes;

[0022] An air duct and an extrusion box. The air duct is fixedly installed on a side wall of the detection box away from the fan, and the extrusion box is fixedly installed on the bottom wall of the air duct. The extrusion box is trapezoidal, and the bottom end of the extrusion box corresponds to the side wall of the shielding curtain.

[0023] In some embodiments, the air guiding assembly further includes;

[0024] Heat dissipation grooves. There are a plurality of heat dissipation grooves, and the plurality of heat dissipation grooves are equidistantly opened on the side walls of the detection box and the air duct. The heat dissipation grooves are inclinedly distributed, and the end of the heat dissipation groove away from the air duct is located at the top end of the detection box.

[0025] In some embodiments, a filtering assembly is provided on the top of the conveying device. The filtering assembly includes;

[0026] A mounting plate and a handle. The mounting plate is slidably installed on the top wall of the detection box, and the handle is fixedly installed on the top wall of the mounting plate;

[0027] A filtering box and a collection box. The filtering box is fixedly installed on the bottom wall of the mounting plate, and the collection box is fixedly installed on the side wall of the filtering box.

[0028] In some embodiments, a filtering material is laid inside the filtering box, and the two ends of the filtering box are respectively located at the diagonals of the mounting plate and the collection box.

[0029] In some embodiments, a support assembly is provided inside the conveying device. The support assembly includes;

[0030] A mounting block, an extrusion rod and a support spring. The mounting block is fixedly installed on the side wall of the mounting frame on the conveying device. The extrusion rod slidably penetrates through the bottom wall of the mounting block, and the support spring is arranged inside the mounting block and is located at the top end of the extrusion rod.

[0031] In some embodiments, the support assembly further includes;

[0032] A guiding roller. The guiding roller is rotatably installed at the bottom end of the extrusion rod, and the side wall of the guiding roller is attached to the inner side wall of the conveyor belt on the conveying device;

[0033] A support plate. The support plate is fixedly installed on the side wall of the mounting block, and the top wall of the support plate is attached to the inner side wall of the transmission belt on the conveying device.

[0034] Compared with the prior art, the remarkable advantages of the present invention are:

[0035] First, the present invention uses a conveying device to transport the wood to be tested. Due to the foldable nature of the folding cloth, the pressing roller can be pressed on the surface of the wood, and the shielding curtain is also pressed on the surface of the wood, so that the space on the top of the wood is folded to reduce the brightness inside the detection box as much as possible. The downward pressure of the mounting strip is increased by squeezing the spring so that the pressing roller can fit tightly with the surface of the wood. The movement of the wood can drive the pressing roller to rotate together. Driven by the driving belt, the cleaning rod rotates synchronously with the pressing roller, so the cleaning rod can clean the surface of the wood and clean the dust on the surface of the wood. The dust cleaned by the cleaning rod is sucked away by the operation of the fan, so as to avoid the situation where the dust attached to the surface of the wood affects the measurement results. The problem of the existing dust on the surface of the wood affecting the detection results is solved.

[0036] Secondly, the present invention guides the air output by the fan through the air duct so that the airflow blows on the surface of the blackout curtain, and increases the impact force of the airflow through the extrusion box so that the blackout curtain can fit closely with the surface of the wood. Since the air inside the air duct is flowing and the air around the camera is static, the air around the camera is connected to the inside of the air duct through the heat dissipation groove, and a pressure difference is formed between the inside of the detection box and the inside of the air duct. According to Bernoulli's principle, the air inside the detection box will be sucked into the inside of the air duct, taking away the heat generated by the camera and the light source, thereby avoiding the situation where the temperature of the camera and the light source is high.

[0037] Thirdly, the present invention places the mounting plate, the filter box and the collecting box into the interior of the detection box, and intercepts the dust in the airflow output by the fan through the filter box. Since the two ends of the filter box are located at the diagonals of the mounting plate and the collecting box, the dust falling off the side walls of the filter box will flow along the side walls of the filter box and fall into the interior of the collecting box, and accumulate at the corners of the filter box and the collecting box under the influence of the airflow. The filter box and the collecting box can be taken out of the interior of the detection box by lifting the handle. Since the dust falling off the side walls of the filter box will be collected by the collecting box, it is convenient to centrally process the dust filtered out by the filter box.

[0038] Fourthly, the present invention utilizes the elasticity of the supporting spring to push the extrusion rod downward, so that the side wall of the guide roller fits with the side wall of the conveyor belt on the conveying device, so that the conveyor belt on the conveying device is in a taut state. At the same time, with the support of the support plate, when the pressing roller presses on the side wall of the wood, the conveyor belt on the conveying device will not be deformed, thereby avoiding the deformation of the conveyor belt on the conveying device, which may cause the measuring component to be unable to detect accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0040] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0041] Figure 2 is a three-dimensional schematic diagram of the cross-sectional structure of the present invention;

[0042] Figure 3 is a three-dimensional schematic diagram of the internal structure of the detection box of the present invention;

[0043] Figure 4 is the present invention Figure 2 enlarged schematic diagram at position A in;

[0044] Figure 5 is the present invention Figure 2 enlarged schematic diagram at position B in;

[0045] Figure 6 is the present invention Figure 2 enlarged schematic diagram at position C in;

[0046] Figure 7 is a schematic diagram of the connection relationship of the cleaning rod of the present invention;

[0047] Figure 8 is a schematic diagram of the position of the compression spring of the present invention;

[0048] Figure 9 is a three-dimensional schematic diagram of the overall structure of the filter plate box of the present invention.

[0049] Explanation of reference numerals:

[0050] 1. Conveyor device; 21. Detection box; 22. Mounting rod; 23. Camera; 24. Light source; 31. Folding cloth; 32. Mounting strip; 33. Pressing roller; 34. Adjusting screw; 35. Adjusting nut; 36. Compression spring; 37. Shading curtain; 38. Connecting shaft; 41. Dust removal box; 42. Fan; 43. Connecting hose; 44. Shading cover; 45. Cleaning rod; 46. Positioning rod; 47. Rotating shaft; 48. Driving belt; 51. Air duct; 52. Extrusion box; 53. Heat dissipation groove; 61. Mounting block; 62. Extrusion rod; 63. Guide roller; 64. Support spring; 65. Support plate; 71. Mounting plate; 72. Filter box; 73. Collection box; 74. Handle. Detailed implementation manners

[0051] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0052] The present invention provides an improved wood surface defect detection device based on wood science and engineering. The technical solution of the present invention is as follows:

[0053] such as Figures 1 - 8As shown in the figure, a wood surface defect detection device based on wood science and engineering includes a conveying device 1, which is composed of a mounting frame, a driving roller, a conveyor belt and a driving motor; a detection component is arranged on the top of the conveying device 1, and the detection component includes a detection box 21, a mounting rod 22, a camera 23 and a light source 24. The detection box 21 is fixedly installed on the top wall surface of the mounting frame of the conveying device 1. Through grooves for the wood to pass through are opened on the front and rear side wall surfaces of the detection box 21. The mounting rod 22 is fixedly installed on the top end of the inner side wall of the detection box 21. The camera 23 is rotatably installed at the bottom end of the mounting rod 22. The camera 23 uses an industrial ccd camera. The light source 24 is fixedly installed on the top wall surface inside the detection box 21. The light source 24 uses a strip light source; the conveying device 1 conveys the wood to be detected. The wood enters the inside of the detection box 21 along with the conveyor belt through the feeding groove. The light source 24 emits a light source 24 in a linear shape on the surface of the wood. The camera 23 takes continuous photos to record the light at different positions on the wood surface, so as to judge whether there are defects on the wood surface; a shielding component is arranged inside the detection box 21, and the shielding component includes a folding cloth 31, a mounting strip 32, a pressing roller 33, an adjusting screw 34, an adjusting nut 35, a compression spring 36, a shielding curtain 37 and a connecting shaft 38. There are two folding cloths 31 in total. The two folding cloths 31 are fixedly installed on the inner top wall surface of the detection box 21 near the front through groove in a mirror image. The mounting strip 32 is fixedly installed on the bottom wall surface of the two folding cloths 31. The pressing roller 33 is located inside the mounting strip 32. A rubber ring is sleeved on the side wall of the pressing roller 33. There are two connecting shafts 38 in total. The two connecting shafts 38 are respectively fixedly installed at both ends of the pressing roller 33. The two connecting shafts 38 are both rotatably installed inside the mounting strip 32. The adjusting screw 34 is rotatably installed on the top wall surface of the mounting strip 32, and the top end of the adjusting screw 34 slides through the inside of the detection box 21. The adjusting nut 35 is threadedly installed on the top side wall of the adjusting screw 34. There are multiple compression springs 36 in total. The multiple compression springs 36 are equidistantly fixedly installed on the top wall surface of the mounting strip 32. The top end of the compression spring 36 is fixedly installed on the corresponding side wall inside the detection box 21. The shielding curtain 37 is fixedly installed on the inner top wall surface of the detection box 21 near the rear through groove; when the wood moves along with the conveyor belt, due to the foldable characteristic of the folding cloth 31, the pressing roller 33 can press on the surface of the wood, and the shielding curtain 37 also presses on the surface of the wood, folding the space above the wood to reduce the brightness inside the detection box 21 as much as possible, so that the camera 23 can clearly take the result of the light emitted by the light source 24 shining on the wood surface; the position of the mounting strip 32 is restricted by the adjusting screw 34 to ensure that the mounting strip 32 can move up and down stably. The initial position of the mounting strip 32 is set by the adjusting nut 35 to facilitate the wood to move from the bottom of the mounting strip 32. The downward pressure of the mounting strip 32 is increased by the compression spring 36, so that the pressing roller 33 can be closely attached to the surface of the wood, and the movement of the wood can drive the pressing roller 33 to rotate together;A dust removal component is provided on the top of the conveying device 1. The dust removal component includes a dust removal box 41, a blower 42, a connecting hose 43, a shielding cover 44, a cleaning rod 45, a positioning rod 46, a rotating shaft 47 and a driving belt 48. The dust removal box 41 is fixedly installed on the top wall surface of the detection box 21. The blower 42 is fixedly installed inside the dust removal box 41. The connecting hose 43 is fixedly installed on the side wall of the detection box 21. The shielding cover 44 is arranged inside the detection box 21 and is fixedly installed on the side wall of the installation strip 32. The two ends of the connecting hose 43 are respectively fixedly connected to the input end of the blower 42 and the top wall surface of the shielding cover 44. The cleaning rod 45 is arranged inside the shielding cover 44, and brush hairs are laid on the side wall of the cleaning rod 45. There are two positioning rods 46 in total, and the two positioning rods 46 are fixedly installed on the side wall of the installation strip 32. There are two rotating shafts 47 in total, and the two rotating shafts 47 are respectively fixedly installed at both ends of the cleaning rod 45. The two rotating shafts 47 are respectively rotatably installed on the side walls of the adjacent positioning rods 46. The driving belt 48 is sleeved on the side walls of the connecting shaft 38 and the rotating shaft 47. When the wood moves into the detection box 21, under the drive of the driving belt 48, the cleaning rod 45 rotates synchronously with the pressing roller 33. Therefore, the cleaning rod 45 can clean the surface of the wood and remove the dust on the surface of the wood. Through the operation of the blower 42, the dust cleaned by the cleaning rod 45 is sucked away, avoiding the situation that the surface of the wood is attached with dust and affecting the measurement result. By sucking away the dust, the situation that the dust spreads outside and affects the health of the staff is avoided.

[0054] As Figures 1 - 9 shown, in an embodiment, in order to further reduce environmental pollution, a filtering component is provided on the top of the conveying device 1. The filtering component includes a mounting plate 71, a filtering box 72, a collecting box 73 and a handle 74. The mounting plate 71 is slidably installed on the top wall surface of the detection box 21. The filtering box 72 is fixedly installed on the bottom wall surface of the mounting plate 71. Filtering materials are laid inside the filtering box 72. The filtering box 72 is distributed in an inclined shape. The collecting box 73 is fixedly installed on the side wall of the filtering box 72. The two ends of the filtering box 72 are respectively located at the diagonals of the mounting plate 71 and the collecting box 73. The handle 74 is fixedly installed on the top wall surface of the mounting plate 71. By putting the mounting plate 71, the filtering box 72 and the collecting box 73 into the detection box 21, the dust in the air flow output by the blower 42 is intercepted by the filtering box 72. Since the two ends of the filtering box 72 are located at the diagonals of the mounting plate 71 and the collecting box 73, the dust falling off the side wall of the filtering box 72 will flow along the side wall of the filtering box 72 and fall into the inside of the collecting box 73, and accumulate at the corner of the filtering box 72 and the collecting box 73 under the influence of the air flow. By lifting the handle 74, the filtering box 72 and the collecting box 73 are taken out of the detection box 21. Since the dust falling off the side wall of the filtering box 72 is collected by the collecting box 73, it is convenient to centrally process the dust filtered by the filtering box 72.

[0055] As Figures 1 - 8 shown, in one embodiment, in order to ensure that the shielding curtain 37 can be closely attached to the surface of the wood, a wind guiding assembly is provided on the top of the conveying device 1. The wind guiding assembly includes a wind guiding pipe 51, a pressing box 52 and a heat dissipation groove 53. The wind guiding pipe 51 is fixedly installed on a side wall surface of the detection box 21 away from the blower 42. The pressing box 52 is fixedly installed on the bottom wall surface of the wind guiding pipe 51. The pressing box 52 is trapezoidal in shape. The bottom end of the pressing box 52 corresponds to the side wall of the shielding curtain 37. There are a plurality of heat dissipation grooves 53. The plurality of heat dissipation grooves 53 are equidistantly opened on the side wall surfaces of the detection box 21 and the wind guiding pipe 51. The heat dissipation grooves 53 are inclinedly distributed. One end of the heat dissipation groove 53 away from the wind guiding pipe 51 is located at the top end of the detection box 21. The air output by the blower 42 is guided through the wind guiding pipe 51 so that the air flow blows on the surface of the shielding curtain 37. The impact force of the air flow is increased through the pressing box 52 so that the shielding curtain 37 can be closely attached to the surface of the wood. Since the air inside the wind guiding pipe 51 is flowing and the air around the camera 23 is in a static state, the air around the camera 23 is communicated with the inside of the wind guiding pipe 51 through the heat dissipation groove 53, and a pressure difference is formed between the inside of the detection box 21 and the inside of the wind guiding pipe 51. According to Bernoulli's principle, the air inside the detection box 21 will be sucked into the inside of the wind guiding pipe 51 to take away the heat generated by the camera 23 and the light source 24, avoiding the situation where the temperatures of the camera 23 and the light source 24 are relatively high.

[0056] As Figure 2 and Figure 6 shown, in one embodiment, in order to ensure the stable position of the wood, a support assembly is provided inside the conveying device 1. The support assembly includes a mounting block 61, a pressing rod 62, a guiding roller 63, a support spring 64 and a support plate 65. The mounting block 61 is fixedly installed on the side wall of the mounting frame on the conveying device 1. The pressing rod 62 slidably penetrates through the bottom wall surface of the mounting block 61. The guiding roller 63 is rotatably installed at the bottom end of the pressing rod 62. The side wall of the guiding roller 63 is attached to the inner side wall of the conveyor belt on the conveying device 1. The support spring 64 is arranged inside the mounting block 61. The support spring 64 is located at the top end of the pressing rod 62. The support plate 65 is fixedly installed on the side wall of the mounting block 61. The top wall surface of the support plate 65 is attached to the inner side wall of the conveyor belt on the conveying device 1. By using the elasticity of the support spring 64 to push the pressing rod 62 downward, the side wall of the guiding roller 63 is attached to the side wall of the conveyor belt on the conveying device 1, so that the conveyor belt on the conveying device 1 is in a taut state. At the same time, under the support of the support plate 65, when the pressing roller 33 presses on the side wall of the wood, the conveyor belt on the conveying device 1 will not be deformed, avoiding the situation where the conveyor belt on the conveying device 1 is deformed, resulting in inaccurate detection by the measuring assembly.

[0057] The specific working method is: the conveyor 1 is used to convey the material to be inspected. Due to the foldable characteristics of the folding cloth 31, the pressing roller 33 can be pressed on the surface of the wood, and the shielding curtain 37 is also pressed on the surface of the wood, the space on the top of the wood is folded, and the brightness inside the detection box 21 is reduced as much as possible. The downward pressure of the mounting strip 32 is increased by the squeezing spring 36, so that the pressing roller 33 can fit closely with the surface of the wood. The movement of the wood can drive the pressing roller 33 to rotate together. Under the drive of the driving belt 48, the cleaning rod 45 rotates synchronously with the pressing roller 33. Therefore, the cleaning rod 45 can clean the surface of the wood and clean the dust on the surface of the wood. Through the operation of the fan 42, the dust cleaned by the cleaning rod 45 is sucked away to avoid the situation that the dust attached to the surface of the wood affects the measurement result. By sucking away the dust, the dust is prevented from spreading outside and affecting the health of the staff. The light source 24 emits a line on the surface of the wood, and the camera 23 takes pictures continuously to record the light at different positions on the surface of the wood to determine whether there are defects on the surface of the wood.

[0058] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacement of the above technical features. Matters not covered in the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A wood surface defect detection device based on wood science and engineering, comprising a conveying device (1), the conveying device (1) being composed of a mounting frame, a transmission roller, a conveyor belt and a driving motor, characterized in that: A detection component is arranged on the top of the conveying device (1), and the detection component comprises: A detection box (21) and a mounting rod (22), wherein the detection box (21) is fixedly mounted on the top wall of the mounting frame on the conveying device (1), and the front and rear side walls of the detection box (21) are both provided with through slots, and the mounting rod (22) is fixedly mounted on the top of the inner side wall of the detection box (21); A camera (23) and a light source (24), wherein the camera (23) and the light source (24) are used to detect defects on the surface of wood; A shielding component is arranged inside the detection box (21), and the shielding component comprises: A folded cloth (31) and a shielding curtain (37), wherein the folded cloth (31) and the shielding curtain (37) are used to reduce the brightness inside the detection box (21); A mounting strip (32) and a squeezing spring (36), wherein the mounting strip (32) is fixedly mounted on the bottom wall of the folding cloth (31), and the squeezing spring (36) is used to ensure that the mounting strip (32) extends downward; A pressing roller (33) and a connecting shaft (38), wherein the pressing roller (33) is located inside the mounting bar (32), and the connecting shaft (38) is used to rotatably mount the pressing roller (33) inside the mounting bar (32); A dust removal assembly is arranged on the top of the conveying device (1), and the dust removal assembly comprises: A dust removal box (41) and a fan (42), wherein the dust removal box (41) is fixedly mounted on the top wall of the detection box (21), and the fan (42) is fixedly mounted inside the dust removal box (41); A connecting hose (43) and a shielding cover (44), wherein the shielding cover (44) is fixedly mounted on a side wall of the mounting strip (32), and the connecting hose (43) is used to connect the shielding cover (44) with an input end of the fan (42); A cleaning rod (45), a positioning rod (46) and a rotating shaft (47), wherein the cleaning rod (45) is arranged inside the shielding cover (44), the positioning rod (46) is used to position the cleaning rod (45), and the rotating shaft (47) is used to rotatably mount the cleaning rod (45) on the side wall of the positioning rod (46); A driving belt (48) is sleeved on the side walls of the connecting shaft (38) and the rotating shaft (47).

2. The wood surface defect detection device based on wood science and engineering according to claim 1 is characterized by: The side wall of the pressing roller (33) is sleeved with a rubber ring, and the side wall of the cleaning rod (45) is covered with bristles.

3. The wood surface defect detection device based on wood science and engineering according to claim 1 is characterized by: The shielding component also includes: An adjusting screw (34) and an adjusting nut (35), wherein the adjusting screw (34) is rotatably mounted on the top wall of the mounting bar (32), and the top end of the adjusting screw (34) slides through the interior of the detection box (21), and the adjusting nut (35) is threadedly mounted on the top end of the side wall of the adjusting screw (34).

4. The wood surface defect detection device based on wood science and engineering according to claim 1 is characterized by: The top of the conveying device (1) is provided with an air guide component, which comprises: The air guide duct (51) and the extrusion box (52) are fixedly mounted on a side wall of the detection box (21) away from the fan (42), and the extrusion box (52) is fixedly mounted on the bottom wall of the air guide duct (51). The extrusion box (52) is in a trapezoidal shape, and the bottom end of the extrusion box (52) corresponds to the side wall of the shielding curtain (37).

5. The wood surface defect detection device based on wood science and engineering according to claim 4 is characterized in that: The air guide assembly also includes: There are a plurality of heat dissipation grooves (53), the plurality of heat dissipation grooves (53) are equidistantly arranged on the side walls of the detection box (21) and the air duct (51), the heat dissipation grooves (53) are distributed in an inclined shape, and one end of the heat dissipation groove (53) away from the air duct (51) is located at the top of the detection box (21).

6. The wood surface defect detection device based on wood science and engineering according to claim 1 is characterized by: A filter assembly is arranged on the top of the conveying device (1), and the filter assembly comprises: A mounting plate (71) and a handle (74), wherein the mounting plate (71) is slidably mounted on the top wall of the detection box (21), and the handle (74) is fixedly mounted on the top wall of the mounting plate (71); A filter box (72) and a collection box (73), wherein the filter box (72) is fixedly mounted on the bottom wall of the mounting plate (71), and the collection box (73) is fixedly mounted on the side wall of the filter box (72).

7. The wood surface defect detection device based on wood science and engineering according to claim 6 is characterized by: The interior of the filter box (72) is paved with filter material, and the two ends of the filter box (72) are respectively located at the diagonal positions of the mounting plate (71) and the collection box (73).

8. The wood surface defect detection device based on wood science and engineering according to claim 1 is characterized by: A support assembly is arranged inside the conveying device (1), and the support assembly comprises: The invention relates to a mounting block (61), an extrusion rod (62) and a support spring (64). The mounting block (61) is fixedly mounted on the side wall of the mounting frame on the conveying device (1). The extrusion rod (62) slides through the bottom wall of the mounting block (61). The support spring (64) is arranged inside the mounting block (61). The support spring (64) is located at the top end of the extrusion rod (62).

9. The wood surface defect detection device based on wood science and engineering according to claim 8, characterized in that: The support assembly also includes: A guide roller (63), wherein the guide roller (63) is rotatably mounted on the bottom end of the extrusion rod (62), and the side wall of the guide roller (63) is in contact with the inner side wall of the conveyor belt on the conveyor device (1); A support plate (65), wherein the support plate (65) is fixedly mounted on the side wall of the mounting block (61), and the top wall surface of the support plate (65) is in contact with the inner side wall of the transmission belt on the conveying device (1).

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