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CN-122016795-A - Wood surface quality detection method and system

CN122016795ACN 122016795 ACN122016795 ACN 122016795ACN-122016795-A

Abstract

The invention discloses a wood surface quality detection method and system, which comprises a box body, a visual detection mechanism and a coding device, wherein the coding device is arranged on the box body and used for sensing the moving speed of wood, a gray level sensing device is arranged on one side of the box body, an inward concave detection position is arranged on one side of the box body and used for allowing a wood board to pass through, and the visual detection mechanism comprises a polishing machine used for photographing and scanning the upper surface of the wood board, a lower machine used for photographing and scanning the lower surface of the wood board and a middle machine used for photographing and scanning the side surface of the wood board. The invention adopts the upper, middle and lower three optical machines to detect the upper surface, side edge and lower surface of the wood at the same time, thereby greatly improving the detection efficiency. The invention collects the wood surface image through the visual detection mechanism, and enhances the texture characteristics by utilizing the image preprocessing technology, and the visual detection mechanism has IP 6-level dustproof capability, does not influence imaging quality in a high dust environment, and is suitable for being used in a high dust environment of a wood factory.

Inventors

  • HU WEI
  • GAO XING
  • ZHANG WEILIANG
  • ZHANG LIANGPING

Assignees

  • 东莞东聚电子电讯制品有限公司

Dates

Publication Date
20260512
Application Date
20251205

Claims (10)

  1. 1. A method for detecting the surface quality of wood, comprising the following steps: step 1, sensing the wood moving speed by adopting an encoder (32); step 2, collecting color data information of wood by using a gray level induction sensor (43); step3, transmitting color data information acquired by the gray level sensing sensor (43) to an industrial computer; step 4, analyzing by an industrial computer through an AI system and converting color data information into parameters; step 5, transmitting the converted parameters to a visual detection mechanism (2) and a light source (5); And 6, automatically adjusting the exposure value, the gain and the photographing scanning times by the visual detection mechanism (2) according to the parameters, enhancing the texture characteristics of the wood by utilizing an image preprocessing technology, and simultaneously controlling the brightness of the light source to correspond to the wood boards with different colors and textures so as to realize high-speed automatic detection.
  2. 2. A wood surface quality detection system, applying the wood surface quality detection method according to claim 1, comprising a box (1) and a visual detection mechanism (2) arranged in the box (1) and used for photographing and detecting a wood board, and the wood surface quality detection system is characterized by further comprising: the coding device (3) is arranged on the box body (1) and is used for sensing the moving speed of the wood; the gray level sensing device (4) is arranged on the box body (1) and is used for collecting wood color data information; a detection position (11) which is concave inwards and used for allowing the wood board to pass through is arranged on one side of the box body (1); The visual detection mechanism (2) comprises a polishing machine (21) for photographing and scanning the upper surface of the wood board, a downlighting machine (23) for photographing and scanning the lower surface of the wood board and a middle lighting machine (22) for photographing and scanning the side surface of the wood board.
  3. 3. The wood surface quality detection system according to claim 2, wherein the detection position (11) is provided with an upper transparent part (111) for photographing and scanning by the glosser (21), the detection position (11) is provided with a lower transparent part (113) for photographing and scanning by the glosser (23), and the detection position (11) is provided with a middle transparent part (112) for photographing and scanning by the middle glosser (22).
  4. 4. The wood surface quality detection system according to claim 1, wherein the first cavity (101) and the second cavity (102) are arranged in the box body (1), the polishing machine (21) is arranged in the first cavity (101), and the polishing machine (23) and the polishing machine (22) are arranged in the second cavity (102).
  5. 5. A wood surface quality inspection system according to claim 1, characterized in that the box (1) is provided with a light source (5) for illuminating the wood for light filling.
  6. 6. The wood surface quality inspection system according to claim 1, wherein the encoder (3) comprises an encoder bracket (31) mounted on the box (1), an encoder (32) disposed on the encoder bracket (31) and used for sensing the moving speed of the wood, and a first supporting portion (33) disposed on the box (1) and used for supporting the wood board.
  7. 7. The wood surface quality detection system according to claim 1, wherein the gray sensing device (4) comprises a sensor bracket (41) arranged on the box body (1), a second supporting part (42) arranged on the sensor bracket (41) and used for supporting the wood board, and a gray sensing sensor (43) arranged on the sensor bracket (41) and used for collecting color data of the wood board.
  8. 8. The wood surface quality detection system according to claim 1, wherein an adjusting mechanism (6) for driving the box (1) to adjust and move is arranged below the box (1), the adjusting mechanism (6) comprises a first bottom plate (61), a first sliding rail (62) arranged on the first bottom plate (61), a first sliding block (63) slidably arranged on the first sliding rail (62), a first lifting frame (64) arranged on the first sliding block (63) and capable of sliding along with the first sliding block, an adjusting switch (65) arranged on the first bottom plate (61) and used for limiting the first lifting frame (64), a first connecting plate (66) fixed at the lower end of the box (1), a first lifting sliding rail (67) arranged on the first connecting plate (66) and a first lifting cylinder (68) arranged on the first lifting frame (64) and capable of lifting and connecting with the first sliding rail (62).
  9. 9. The wood surface quality detection system according to claim 1, wherein a damping mechanism (7) for reducing external vibration is arranged above the box body (1), the damping mechanism (7) comprises a second buffering frame (73) arranged at the upper end of the box body (1) and used for being connected with the outside to perform damping buffering, and a second mounting frame (74) slidably arranged on the second buffering frame (73), a second sliding block (72) is arranged on the second buffering frame (73), and a second sliding rail (71) corresponding to the second sliding block (72) is arranged on the second mounting frame (74).
  10. 10. The wood surface quality detection system according to claim 1, wherein the glazing machine (21) comprises a wire sweep camera (211), an upper focusing speed reducing motor (212) which is arranged on the wire sweep camera (211) in a transmission way and is used for driving the wire sweep camera (211) to automatically focus, and an upper light inlet sleeve (213) which is arranged on the wire sweep camera (211), wherein an upper flat mirror (214) which is used for refracting external light into the upper light inlet sleeve (213) is arranged in the upper light inlet sleeve (213); The lower ray scanning device comprises a lower ray scanning camera (231), a lower focusing speed reducing motor (232) which is arranged on the lower ray scanning camera (231) in a transmission way and used for driving the lower ray scanning camera (231) to automatically focus, and a lower light inlet sleeve (233) which is arranged on the lower ray scanning camera (231), wherein a lower flat mirror (234) used for refracting external light into the lower light inlet sleeve (233) is arranged in the lower light inlet sleeve (233); The middle light machine (22) comprises a middle line scanning camera (221), a middle focusing speed reducing motor (222) which is arranged on the middle line scanning camera (221) in a transmission way and used for driving the middle line scanning camera (221) to automatically focus, and a middle light inlet sleeve (223) which is arranged on the middle line scanning camera (221).

Description

Wood surface quality detection method and system Technical Field The invention relates to the technical field of product surface detection, in particular to a wood surface quality detection method and system. Background The wood appearance detection is mainly used for evaluating the surface quality and the overall appearance characteristics of the wood, and ensures that the wood meets the use standard. The wood surface defect refers to physical or appearance defects of a local area of the wood surface caused by factors such as a growth environment or a production process in the process of growing or producing the wood. Common wood surface defects are knots, discoloration, decay, insect damage, cracks, scars (damage), wood processing defects, deformation, and the like. At present, the wood surface quality detection process is particularly important in the wood industry, most wood manufacturers in the market basically adopt a manual visual inspection mode, so that the efficiency is low, the accuracy is poor, the defect beliefs of everyone cannot be unified, and the standardization and automation of enterprises are very unfavorable. The current visual inspection device in the market has a camera arranged at the inner top of a lamp box, for example, chinese patent application No. CN219496131U discloses a wood surface visual inspection device which comprises a lamp box, wherein a first inclined side surface and a second inclined side surface are arranged in the lamp box, a diffuse reflection plate is arranged on the inclined side surface, the camera is arranged at the top of the lamp box, a camera lens is arranged in the lamp box and is used for shooting a FOV image on the wood surface in an inspection area, a first vertical side surface and a second vertical side surface are arranged in the lamp box, a first light source is arranged at the bottom of the first vertical side surface, a second light source is arranged at the bottom of the second vertical side surface, the first light source and the second light source are distributed on two sides of the inspection area, and the light emitting surfaces of the first light source and the second light source are respectively parallel to the diffuse reflection plate on the second inclined side surface and the first inclined side surface. The diffuse reflection plate provides diffuse reflection effect for light rays emitted by the light source, reduces directivity of the light, improves uniformity of illumination in the lamp box, and accordingly obtains a uniform and stable diffuse light irradiation area. The FOV image of the wood surface shot by the camera under the diffuse light irradiation area restores the wood surface more truly, and is beneficial to detection of the FOV image of the wood surface. The existing wood surface visual detection device provides a diffuse reflection effect for light rays emitted by a light source through a diffuse reflection plate, so that illumination in a lamp box is uniform, a camera is arranged at the top of the lamp box, wood is arranged at the bottom, only one surface of the wood can be detected simultaneously when shooting downwards, the wood can be continuously detected only after one surface is shot, the side surface of the wood is difficult to detect, the detection efficiency is very limited, in addition, the dust resistance is poor, dust is easy to be stuck in environments with high dust such as a wood processing factory, and the shooting is fuzzy, so that the system cannot operate. In view of this, the present inventors have proposed the following means. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a method and a system for detecting the surface quality of wood. In order to solve the technical problems, the invention adopts the following technical scheme that the method for detecting the surface quality of the wood comprises the following steps: Step 1, sensing the moving speed of wood by adopting an encoder; Step 2, collecting color data information of the wood by using a gray level induction sensor; step 3, transmitting the color data information acquired by the gray level sensing sensor to an industrial computer; step 4, analyzing by an industrial computer through an AI system and converting color data information into parameters; Step 5, transmitting the converted parameters to a visual detection mechanism and a light source; And 6, automatically adjusting the exposure value, the gain and the photographing scanning times by the visual detection mechanism according to the parameters, enhancing the texture characteristics of the wood by utilizing an image preprocessing technology, and simultaneously controlling the brightness of the light source to correspond to the wood boards with different colors and textures so as to realize high-speed automatic detection. According to another aspect of the invention, the wood surface quality detection system comprises a box body, a vis