JP2023029260A - Inspection device and sorting device for laminated wood materials - Google Patents

Abstract

To provide inspection device for laminated materials such as plywood made of wood.SOLUTION: A laminated wood material inspection device is provided, comprising a surface inspection unit configured to utilize vertical irradiation light and oblique irradiation light irradiated on a surface of a laminated wood material, and a butt end inspection unit configured to utilize butt-end irradiation light irradiated on a butt end of the laminated wood material.SELECTED DRAWING: Figure 2

Description

The present invention relates to the technical field of manufacturing laminated wood lumber.

In recent years, trees such as cedar and cypress planted in forests in Japan have grown, and the amount of timber stock in Japan has increased. The use of wood as a building material is expected in conjunction with the movement toward a decarbonized society.
When using it as a building material, it is required to inspect the quality and manufacture and supply products that meet the requirements.
There are two forms of lumber: one that is used in its pure state, and the other that is used as laminated lumber such as plywood and laminated lumber. Plywood is manufactured by cutting veneers from raw wood logs, drying, gluing and laminating the veneers, and pressing. In plywood, veneers are used, which are divided into types such as top board, back board, core board, and core board. For example, the top board is a board with a clean surface with few defects, and the core board is a board that is thicker than the top board, even if it has knots and colors. In principle, plywood is laminated with the fiber directions perpendicular to each other, so the fiber direction is the longitudinal direction of the plywood for odd-numbered layers such as front and back, and the orthogonal direction to the plywood for even-numbered layers such as center plates. These veneers are evaluated and sorted according to their use in the veneer state. The present applicant also proposed a method and a sorting apparatus for sorting by evaluating defects and discoloration using transmitted light and reflected light, as shown in Patent Document 1 (Japanese Patent No. 6017390).

Laminated materials such as plywood have a number of layers and an adhesive layer, and the irradiated light cannot be transmitted. Therefore, the inspection method using transmitted light cannot be used, and the evaluation method described above cannot be applied.

Japanese Patent No. 6017390

An object of the present invention is to develop an inspection apparatus for laminated materials such as plywood using wood.

1. A laminated wood material comprising a surface inspection device using vertical irradiation light and oblique irradiation light irradiated to the surface of the laminated wood material and a butt end inspection device utilizing the wood end irradiation light irradiated to the butt end of the laminated wood material. inspection equipment.
2. 1. The surface inspection device is equipped with inspection devices for both front and back surfaces. An inspection apparatus for wood laminates as described above.
3. The surface inspection device includes a vertical lighting means for irradiating the surface of the laminated wood material in a substantially vertical direction, an oblique light lighting means for obliquely irradiating the surface of the laminated wood material, and a surface imaging means,
The surface inspection device is characterized by separating a vertical light image and an oblique light image from the image data captured by the surface imaging device, and comparing both images of a common portion of the laminated wood material to determine the surface properties. 1. An inspection apparatus for wood laminates as described above.
4. The butt inspection apparatus includes a long butt inspection apparatus including long butt lighting and long butt imaging means, and a short butt inspection apparatus including short butt lighting and short butt imaging means,
The long wood end inspection device judges the properties of the long wood end from the long wood end image,
The short butt inspection device determines the properties of the short butt from the image of the short butt.
1. 3. The inspection device for laminated wood material according to .
5. The long buttock inspection image or the short buttock inspection image is a long buttock corrected image obtained by rearranging the images captured by the long or short buttock imaging means or the short buttock imaging means and correcting them in the thickness direction of the laminated wood material, or 4. The image is a short buttock corrected image. An inspection apparatus for wood laminates as described above.
6. If there is a part with a different thickness compared to the front and back in the corrected long or short buttock image, it is corrected so that it is common to the layer of that part by comparing it with the reference long or short buttock image. 5. The second long buttock corrected image or the second short buttock corrected image is used as an image for inspection; An inspection apparatus for wood laminates as described above.
7. The surface inspection device judges the surface based on the information obtained by synchronizing the vertical light image and the oblique light image with the long buttock inspection image and the short buttock inspection image,
The long wood end inspection device determines the long wood end based on information obtained by synchronizing the image of the long wood end with the image of the surface inspection device,
The short butt inspection device judges the short butt on the basis of information obtained by synchronizing the image of the surface inspection device with the image of the short butt,
4. Comprehensive judgment is performed based on surface judgment, long end judgment, and short end judgment. ~6. 3. An inspection device for a laminated wood material according to any one of the above.
8. 1. The laminated wood material is any one of plywood, LVL, LVB, CLT, and thick plywood. ~6. 3. An inspection device for a laminated wood material according to any one of the above.
9. 1. ~6. 3. An inspection and sorting apparatus for laminated wood materials, comprising: the inspection apparatus for laminated wood materials according to any one of the above items;
10. 7. 2. An inspection and sorting apparatus for laminated wood materials, comprising: the inspection apparatus for laminated wood materials described in 1. and a stacking apparatus for sorting and stacking based on the inspection results.
11. The long strip inspection device, the surface inspection device, the short strip inspection device, and the stacking device are arranged in this order, and each of these devices is continuously connected by a transport device, and a general controller is provided to control these devices. An inspection and sorting device for laminated wood timber comprising:
The long wood end inspection device has a transport device that transports laminated wood in the vertical direction, a lighting device and an imaging device on the side of the transport device, and a material detector is installed above the transport device. , the transport device is provided with an encoder,
The surface inspection device includes a conveying device that conveys the laminated wood material in the horizontal direction, a lighting device and an imaging device that are provided above and below the conveying device, and a material detector that is provided above the conveying device. is provided with an encoder,
The illuminating device is provided with two types of reflected light illumination in which reflected light is incident almost perpendicularly to the imaging device and oblique illumination in which reflected light is emitted obliquely.
The short cut edge inspection device has a transport device that transports laminated wood in the horizontal direction, and a lighting device and an imaging device are provided on the side of the transport device.
The sorting device has a plurality of deposition devices, each deposition device being successively provided with a conveying device,
The integrated controller evaluates the laminated wood material based on the three inspections of the long wood end inspection device, the surface inspection device, and the short wood end inspection device, and deposits the wood laminated material in each stacking device of the sorting device according to the evaluation. An inspection and sorting device for wood laminates characterized by:
12. The long buttock inspection apparatus further comprises means for forming a corrected long buttock corrected image by rearranging the captured images in the thickness direction of the laminated wood material,
11. The short butt inspection apparatus further comprises means for forming a short butt corrected image corrected by rearranging the captured images in the thickness direction of the laminated wood material. Inspection and sorting device for laminated wood lumber as described.
13. If there is a portion with a different thickness compared to the front and back in the corrected long buttock image or the corrected short buttock image, it is compared with the long buttock image that serves as a reference or the short buttock image that serves as a reference, and the layers in that portion are common. 12. The second long buttock corrected image or the second short buttock corrected image corrected as above is used as the inspection image. Inspection and sorting device for laminated wood lumber as described.
In the present invention, the front and back of the laminated wood material, both sides of the long wood ends, and both sides of the short wood ends are inspected and judged. However, since the "back surface inspection" is basically the same, the description of the other is omitted. Therefore, the surface includes the front side and the back side, and the surface inspection device includes the front side inspection device and the back side inspection device. is included.

1. INDUSTRIAL APPLICABILITY The present invention has realized a laminated wood lumber inspection apparatus capable of evaluating the properties of the surface and the butt end of a laminated wood lumber by using an image obtained by capturing reflected light of irradiated light.
By comparing the images obtained by using the reflected light from the vertical direction and the light reflected obliquely on the surface of the laminated wood, we can compare the occurrence of shadows due to the unevenness, etc., and identify living knots and knotholes. can judge.
2. Since knots (knotholes), cracks, overlaps, and the like may occur in the butt end of the laminated wood material, these defects can be evaluated based on the image of the reflected light of the irradiated light of the butt end.
3. According to the present invention, plywood laminated with veneers is inspected for laminated wood boards such as thick plywood, multi-layer plywood, plywood, LVL, CLT, LVB, laminated lumber, etc. can be evaluated, grouped into categories, and provided. As a result, it is possible to provide a base material, an exterior material, or the like according to the application.
4. The overall image of the long and short butt ends, which is synthesized by taking in the divided individual images obtained from the line sensor while conveying the laminated wood material, is affected by the warp of the laminated wood material and the vibration of the conveyer. , it may not be possible to obtain a straight image due to bending. In such a case, it is possible to generate a linear inspection image (primary edge correction image) by correcting the individual images by rearranging them in the thickness direction using the surface of the individual images or the median value as a reference. can. Since wood laminates are flat plates, they can be restored to a straight state by laying them flat again.
In addition, when there is a defect in the laminated wood material, it appears as a concave portion in the primary buttock correction image, but it may not be possible to determine which layer has the defect. In such a case, a second correction is performed to generate a secondary edge correction image.
In the second correction, a secondary correction image is obtained by performing an operation such as rearranging the individual images of the concave portions according to the layer of the reference butt end image of the laminated wood material, and the layer of the defective portion can be clarified. can. The reference butt image can be generated by compressing the primary image correction, or it can be based on the layers before and after the recess.
For example, when focusing on the surface line and forming the primary buttock correction image by arranging the surfaces of the individual images of the line sensor in a straight line, the missing part is generated on the lower side, but the missing part is compared to the reference buttock image. By rearranging the other layers to match, the missing layer becomes a recess.
Alternatively, if the primary buttock correction image is obtained by correcting the median value of the individual images, the missing portion appears as concave portions in the vertical direction. Even in this case, by comparing with the reference edge image, the defective layer becomes a concave portion by rearranging so that the layers other than the defective portion are aligned.
Inspection accuracy is improved by inspecting using the primary buttock correction image and the secondary buttock correction image.
5. Japanese conifers such as cedar, pine, cypress, and deciduous pine, which were planted after the war, are growing and accumulating as timber. There is discoloration due to knots and fat, and there are many variations in quality. Appropriate evaluation by the present invention can promote the use of these trees.

The figure which shows the plane outline|summary of a wooden laminated material inspection and classification apparatus. The figure which shows the front outline|summary of a wooden laminated material inspection apparatus. The figure which shows the inspection apparatus of a long wood end. The figure which shows the inspection apparatus of front and back and an inspection of a short cut edge. FIG. 4 shows an example of generating an image obtained from imaging a front or back inspection. The figure which shows the schematic diagram and example photograph of overlap. The figure which shows the schematic diagram of a tunnel, and an example photograph. The figure which shows a determination flowchart. FIG. 4 shows an example of a distorted image; Figures showing corrections, (a) correction by fitting individual images to the surface line, (b) correction by fitting individual images to the center line. FIG. 4 is a diagram showing two-stage correction using a compressed image as a reference image; The figure which shows two-step correction|amendment based on the back and front of a recessed part. The figure which shows the example of a woody laminated material.

INDUSTRIAL APPLICABILITY The present invention is a laminated wood lumber inspection apparatus capable of evaluating the properties of the surface and the butt end of a laminated wood lumber by using an image obtained by capturing reflected light of irradiated light. By comparing the images obtained by using the reflected light from the vertical direction and the light reflected obliquely on the surface of the laminated wood, we can compare the occurrence of shadows due to the unevenness, etc., and identify living knots and knotholes. judge.
Since knotholes, cracks, overlaps, and the like may occur in the butt end of laminated wood lumber, these defects are evaluated based on the image of the butt end.
The present invention is directed to a plywood in which veneers are laminated, a thick plywood in which the number of laminated veneers is increased, and a laminated wood material in which wooden boards such as LVL and CLT are laminated. Inspection of the wood laminates can be performed to provide evaluated and categorized products. As a result, it is possible to provide products according to the application, such as base materials and exterior materials.
Japanese conifers such as cedar, pine, cypress, and deciduous pine have discoloration due to knots and oil, and there are many variations in quality. can do.

The present invention is an inspection apparatus for a laminated wood material, which includes a surface inspection apparatus that utilizes surface irradiation light applied to the surface of the laminated wood material and a butt end inspection apparatus that utilizes the irradiation light applied to the butt end of the laminated wood material. . In the present invention, each inspection is performed while the laminated wood material is being conveyed, and management is performed so that the position of the laminated wood material obtained by each inspection can be specified. For example, by managing each inspection device at a common time, it is possible to synchronize the inspection position of the laminated wood material and evaluate it as a single laminated wood material.
The surface inspection apparatus includes a vertical illumination means for illuminating the surface of the laminated wood material in a substantially vertical direction, an oblique illumination means for obliquely illuminating the surface of the laminated wood material, and a surface imaging means. A vertical light image and an oblique light image are separated from image data captured continuously, and both images of a common portion of the laminated wood material are compared to determine the property of the portion. Since two types of light such as holes and unevenness produce shadows differently, flatness or unevenness can be determined. Also, by using a color image, it is possible to determine rot, discoloration, and the like.
Surface inspection devices can be provided for both the front and back surfaces, and inspection devices having the same configuration can be provided for the front and back surfaces.

The butt inspection apparatus includes a long butt inspection apparatus including long butt lighting and long butt imaging means, and a short butt inspection apparatus including short butt lighting and short butt imaging means.
The long buttock inspection apparatus determines the properties of the long buttock from the long buttock image. The short butt inspection apparatus determines the properties of the short butt from the short butt image. Furthermore, the front and back images can also be determined together with the determination of the edge.

The laminated wood material continuously passes through the inspection device while being transported. During transport, the laminated wood material is detected by a detection sensor, and the position where the laminated wood material passes through each inspection device is recorded by an encoder or the like. It is possible to identify and detect defects at specific locations in the laminated wood material, and to perform an overall inspection.
By sending the inspection signal of each inspection device to the signals of other inspection devices and synchronizing them, it becomes possible to correlate and evaluate them from various aspects. For example, since the overlapping part of the butt end and the bulge of the surface are synchronized, it is possible to grasp the planar range of the overlap.

When an image is acquired with a line sensor under the condition of warped laminated wood or vibration from a transport device, even if the individual images acquired in small sections are arranged side by side, unevenness will appear and the wood end image will be distorted, resulting in a linear overall image. An image cannot be obtained, resulting in an image that is difficult to evaluate (see FIG. 9).
Such a distorted butt end image is corrected by rearranging the individual images in a straight line so that the end face is linear. A corrected image of the long or short butt end (see FIG. 10) (primary butt end corrected image) is used as an image for evaluation, and highly accurate evaluation can be performed.
As a linear correction method, attention is focused on the upper surface (surface) of each image, and the images are aligned linearly. Alternatively, there is a method of aligning by focusing on the center. Since the laminated wood material basically has a uniform thickness, a linear corrected image can be obtained by arranging individual images with reference to the front surface, the bottom surface, the center, and the like.

If there is a defect in the laminated wood material (especially the surface layer or the back layer), it will appear as a dent in the linearly corrected primary grain correction image. to acquire the secondary grain correction image.
There are several means for re-correction. For example, a method in which individual images obtained from a line sensor are rearranged according to a reference image to obtain a secondary edge correction image in which a defective layer is a concave portion. Alternatively, focusing on the surface layer and the back layer, the layers before and after the recess are rearranged according to the surface layer or the back layer that matches the layer before and after the recess. There is a method of rearranging them so that the layer configurations are the most consistent.
It should be noted that defects in which concave portions appear on the surface are often found in the surface layer or the back layer of the laminated wood material. Defects in the intermediate layer often form tunnels.
Further, when laminating plate materials such as lamina, since a part of the lamina is not damaged, the need for secondary correction is small.

Comprehensive judgment is made by comprehensively evaluating the left and right long wood ends, the front and rear short wood ends, and the front and back surfaces.
Comprehensive judgment is determined by considering the type, number, range, etc. of defects such as the number of nodes and the range of tunnels. The judgment criteria may be changed depending on the application, tree species, and the like.

These evaluations and judgments can be made automatically by AI learning.
For the initial judgment criteria, for example, a large number of thick plywoods are prepared, and based on the images taken for each sheet, each wood end and front and back surfaces are input according to the evaluation items and learned.
Accuracy of evaluation can be improved by accumulating learning according to actual work.

In the present invention, two sides of the laminated wood material and four sides of the butt end are inspected and evaluated.
From the inspection of the front and back surfaces, it is possible to detect and evaluate the dimensions, live knots, dead knots, holes, cracks, insect holes, rot, blade marks, putty defects, etc. of the laminated wood material.
From the inspection of the kiguchi, it is possible to detect and evaluate overlapping materials (such as veneers) that make up the layers, tunnels, chips, and so on.
Table 1 shows an example of inspection items.
Laminated wood lumber is a material in which lumber such as wood veneers is laminated in layers, and includes plywood, thick plywood, multi-layer plywood, LVL, CLT, LVB, laminated lumber, and the like.

FIG. 1 shows a plan view of the laminated wood inspection and sorting device SS.
The inspection/sorting device SS includes an inspection device A and a sorting/stacking device B. As shown in FIG. The inspection device A and the sorting/accumulating device B are arranged in series and controlled by a general judgment controller 8 .
The laminated wood material inspection/sorting device SS continuously conveys the laminated wood material 9, inspects and evaluates the laminated wood material 9 during transportation, and sorts the laminated wood material 9 based on the evaluation results. It is a deposition device.

The inspection device A includes a long butt end inspection device 30 , a front/back inspection device 40 and a short butt end inspection device 60 .
The sorting/stacking device B includes a stacking device 10 that sorts and stacks the laminated wood materials 9 evaluated by inspection according to the evaluation. In FIG. 1, the piled plywood A13, the piled plywood B14, and the piled plywood C15 are classified into three types, but this is an example and the present invention is not limited to this.
The general judgment controller 8 controls each inspection device and plywood evaluation, sorting, and stacking at predetermined locations based on inspection data.
These inspections, sorting and stacking are carried out continuously while conveying the laminated wood material 9 by arranging the vertical conveying conveyor 1, the turning conveyor 4, the horizontal conveying conveyor 5 and the conveyor 11. As shown in FIG. The comprehensive determination controller 8 also controls these transport devices.

FIG. 2 is a schematic front view showing the equipment arrangement of the laminated wood material inspection device.
A long strip inspection device 30, a front/back inspection device 40, a short strip inspection device 60, and a stacking device 10 are arranged.
The laminated wooden material 9 is conveyed by a vertical conveyer (the illustration of the vertical conveying device of the long cut end inspection device 30 is omitted), a horizontal carry-in conveyor 5A, and a horizontal carry-out conveyor 5B. 40. After passing through the short cut end inspection device 60, the plywood is evaluated, transferred to the conveyor 11 of the stacking device 10, and deposited by the stacking bar 12 at the locations of the stacked plywood A13, the stacked plywood B14, and the stacked plywood C15 according to the evaluation.

FIG. 3 shows a long butt end inspection device 30 . They are a top view (a), a front view (b), and a side view (c).
A long butt end imaging means 31 and a long butt end lighting 32 are arranged on the side of the vertical transport conveyor 1 that transports the laminated wood material 9 in the longitudinal direction. Left and right long edge imaging means 31L, left long edge lighting 32L, and right long edge imaging means 31R and right long edge lighting 32R are arranged, respectively.
A vertical conveyor 1 is provided with a material detector 2 on the conveying path, and an encoder 3 on the drive shaft. When the material detector 2 detects the conveyed laminated wood material 9, the conveying timing obtained by the encoder 3, the irradiation timing to the long cut edge, and the photographing timing are stored and synchronized in terms of time.

FIG. 4 shows an inspection device for the front and back surfaces and an inspection device for a short cut end. It is a long back surface inspection apparatus figure (a) and a short butt end inspection apparatus figure (b).
As shown in FIGS. 1 and 2, the horizontal transfer conveyor is divided into front and rear, and a front/back inspection device 40 is installed between the front and rear conveyors, the horizontal loading conveyor 5A and the horizontal loading conveyor 5B.
Short butt inspection devices 60 are installed on both sides of the horizontal carry-in conveyor 5B.
A material detector 6 is installed above the horizontal carry-in conveyor 5A.

The front/back inspection device 40 has a surface imaging means 41 and a surface illumination 42 on the surface side of the laminated wood material 9 , and a back surface imaging means 44 and a back illumination 45 on the back side of the laminated wood material 9 .
The surface imaging means 41 is provided with a left surface imaging means 41L and a right surface imaging means 41R arranged on the left and right. The surface illumination 42 is provided with a reflected light illumination 42A and an oblique light illumination 42B. Images obtained by these two types of illumination are captured by the surface imaging means 41 .
The reflected light illumination 42A illuminates the surface of the laminated wood material 9 so that the reflected light enters the surface imaging means 41 at a substantially right angle. The oblique illumination 42B irradiates the laminated wood material 9 obliquely (about 45 degrees in the example shown), and the surface imaging means 41 obtains an image with oblique light. .
The rear surface imaging means 44 is provided with a left rear surface imaging means 44L and a right rear surface imaging means 44R. The back illumination 45 is a reflected light illumination 45A and an oblique illumination 45B. Images obtained by these two types of illumination are picked up by the rear surface imaging means 44 .
Both the reflected light illumination 45A and the oblique light illumination 45B are arranged with respect to the rear surface imaging means 44 in the same manner as the illumination of the front surface of the laminated wood material 9 .

The short butt inspection device 60 includes a short butt imaging means 61 and a short butt illuminator 62 .
A left short butt imaging means 61L and a left short butt lighting 62L are provided on one side of the horizontal carry-in conveyor 5B, and a right short butt imaging means 61R and a right short butt lighting 62R are provided on the other side. The state of the short end of the laminated wooden material 9 is photographed by the short end imaging means 61 based on the light illuminated by the short end illumination 62 .

An encoder 7 is provided on the drive shaft of the horizontal carry-in conveyor 5A. When the material detector 6 detects the transported laminated wood material 9, the transport timing obtained by the encoder 7, the irradiation timing and the photographing timing for the front and back sides, and the irradiation timing and the photographing timing for the wood ends on both sides are adjusted. , are stored and temporally synchronized.
Since the horizontal carrying-in conveyor 5A and the horizontal carrying-out conveyor 5B are controlled to have the same speed, the photographing and storage of the short cut edge inspection device 60 are also synchronized by the encoder 7 provided on the drive shaft of the horizontal carrying-in conveyor 5A.

FIG. 5 shows an example of image generation resulting from imaging a front or back inspection.
In the front/back inspection apparatus 40, the surface imaging means 41 (41L, etc.) takes an image based on two types of reflected light, ie, the reflected light illumination 42A and the oblique light illumination 42B, and an image 51 is generated. Separated images 52 are generated by dividing this imaging 51 into reflected light image separation 52A and oblique light image separation 52B. An imaged image 51 and a separated image 52 are in a state in which separated images by line illumination or the like are arranged.
After that, the separated image 52 is continuously processed to generate a reflected light image generation 53A and an oblique light image generation 53B. When the image generation enlarged photograph 54 is shown by enlarging the image of the same knot, in the oblique light image enlarged photograph 54B compared to the reflected light image enlarged photograph 54A, the roundness of the outline on the right side is smaller, and it can be understood that there is a hole. . If this looks like the same shape, it is flat and can be judged as a living knot.

FIG. 6 shows an example of superimposed images obtained by imaging a long butt end inspection of a laminated wood material.
This wooden laminated material 9 is composed of nine layers. A part of the veneer of the second layer is overlapped and laminated. It is a schematic diagram (a) and the image (b) imaged with the long buttock inspection apparatus. The surfaces are flat, but they are overlapped inside, and the overlapped portion is swollen and distorted in 2 to 4 layers.
Since the laminated wood material 9 is laminated so that the fiber directions are perpendicular to each other, the fiber directions of the upper and lower layers are different, and the laminated state is clearly photographed.
By generating an image in conjunction with surface observation, traces of swelling or compression appear on the surface image, and the width and length of overlap can be determined.

FIG. 7 shows an example of a tunnel image obtained from imaging of a long butt end inspection of a laminated wood material.
This wooden laminated material 9 is composed of nine layers. A part of the veneer of the second layer is missing, and the layers are laminated in the state of a hollow tunnel 21 . It is a schematic diagram (a) and the image (b) imaged with the long buttock inspection apparatus. A slight dent appears on the surface, and a tunnel 21, which is a hole in the missing portion, is formed in the second layer as a black portion where light is not reflected. As an image, it appears black because there is no reflection of light.
This is the same for the short buttock inspection.
By generating an image in conjunction with surface observation, the surface image appears as a thin depression, and the width and length of the tunnel cavity can be determined.

FIG. 8 shows a decision flow chart of the inspecting apparatus for laminated wooden materials.
This determination flowchart is composed of a long butt end determination flow 100 , a front/back side determination flow 200 , a short butt end determination flow 300 and a comprehensive determination flow 400 . The grade of laminated wood lumber is determined based on the determination of the long end, the determination of the front and back surfaces, the result of the determination of the short end, and the overall determination of these.
Since the flow for determining the long butt end and the flow for determining the short butt end are common to both the left and right sides, only one of them is shown. Also, the front/back determination flow includes both the front side and the back side, but since they are common, only the front side is shown.

A flow 100 for judging a long butt end is shown.
The left long wood end imaging means 31L for imaging the long wood end on the left side is of a line sensor type, and photographs the long wood end of the laminated wood material 9 for each minute width while conveying it. The images obtained from the left long butt imaging means 31L are combined by an image generation processing mechanism to construct image information of the entire long butt, and the long butt is determined.
This is done in the same way for the right long end.
In steps 104, 105, and 106, the determination criteria are set by the CPU, the captured image is observed while observing on the monitor, the evaluation items and parameters are set, accumulated, and the evaluation criteria are learned by AI, Establish. After learning with the initial teacher data is completed, the accuracy of AI judgment is improved as data is accumulated through implementation.
Information processing is performed by the left AI controller 33L and the right AI controller 33R.

101 Shading Correction: Corrects uneven brightness and aberrations caused by the optical system in the line image obtained from the left side of the long buttock imaging means 31L.
102 Memory storage: Line images are sequentially stored on the memory.
103 Line image synthesis: Synthesize line images in chronological order to generate an image of a long buttress over the entire length.
104 Shake correction, warpage/curling detection: Corrects the blur caused by the vertical shaking of the product (plywood, etc.) when conveyed by the belt conveyor, corrects the warp/curling that occurs in the product. The accompanying correction will be explained later.
105 Tunnel detection: Detects tunnel-like, lack of original plate, lack of core, chipping, etc. due to partial loss of layer.
106 Overlap detection: detects layer overlap.
107 Long end judgment: Judgment is made based on the number and size of tunnels and overlaps.
The long butt end determination signal is also sent to step 401 .

A surface determination flow 200 is shown. Since the same applies to the back side, the description is omitted.
As shown in FIGS. 1 and 4, the surface has two imaging devices, a left surface imaging means 41L and a right surface imaging means 41R. If the laminated wood material to be inspected is short, it may be one.
Using the vertical reflected light illumination 42A and oblique oblique illumination 42B, the surface of the laminated wood material is imaged using left and right imaging means. The illumination and imager are synchronized by a synchronization circuit. The imaging means for imaging is a color line sensor type. The surface of the laminated wood material 9 is photographed for each minute width while being conveyed. The images obtained from the left surface imaging means 41L and the right surface imaging means 41R are combined by an image generation processing mechanism to generate an image 51 (see FIG. 5) which is image information of the entire surface. The image of the entire surface is obtained by separating the image obtained from the light of the reflected light illumination 42A and the image obtained from the light of the oblique light illumination 42B to obtain two types of separated images 52 (reflected light image separation 52A and diagonal light image separation 52B). See FIG. 5). Continuous processing of the separated images is performed to generate reflected light image generation 53A and oblique light image generation 53B, and color evaluation, knot and hole evaluation are performed, and surface determination is performed.
A surface determination flowchart 200 is shown in FIG. This is done on the back side as well.
For the degree of steps 211, 212, and 213, the judgment criteria are set by the CPU, and while observing the captured image on the monitor, the evaluation items and parameters are set, accumulated, and the evaluation criteria are learned by AI. and establish. After learning with the initial teacher data is completed, it becomes possible to make highly accurate AI judgments as data is accumulated through implementation.
Information processing is performed on the AI controller surface 43 and the AI controller back surface 46 .

201 Imaging: The left side of the laminated wood material is photographed by the left surface imaging means 41L.
202 Shading Correction: Corrects unevenness of brightness and darkness caused by the optical system, aberration, etc. in the line image obtained from the left surface imaging means 41L.
203 Memory storage: Line images are sequentially stored on the memory.
204 to 206: As in 201 to 203, images captured by the right surface imaging means 41R are processed in parallel.
207 Surface image generation: Perform calibration, which is matching of the positional coordinates of the left and right images. An image 51, which is video information of the entire surface, is generated.
208 Image Separation: Image Separation by Illumination. An image obtained from the light of the reflected light illumination 42A and an image obtained from the light of the oblique illumination 42B are separated.
209 Generate reflected light image: Generate reflected light image separation 52A.
210 Create Oblique Image: Create Oblique Image Separation 52B.
211 2-image comparison: The reflected light image separation 52A and the oblique light image separation 52B are compared to detect irregularities such as knots, holes, and cracks, as well as burrows and resin acupuncture points. Evaluate the number and area.
212 Oblique Light Image Evaluation: Detects blue mold, discoloration, and the like. Evaluate the number and area.
213 Comprehensive Judgment: Based on the detections of 211 and 212, judge the surface.
For the evaluations of 211, 212, and 213, parameters are initially set in the control device (CPU), and AI learning is performed using teacher samples. Furthermore, in the implementation stage, case studies are accumulated to improve accuracy.

FIG. 8 shows a flow chart 300 for judging a short butt end.
This flowchart 300 has the same procedure as the flowchart 100 for judging the long butt end shown in FIG. Since this flow is performed for the left and right short butt ends, one of them is omitted.
The left short butt imaging means 61L for imaging the short butt on the left side is of a line sensor type, and takes an image of each minute width while conveying the short butt of the laminated wood material 9 . Images obtained from the left short butt imaging means 61L are combined by an image generation processing mechanism to construct video information of the entire short butt, and judgment of the short butt is performed.
In steps 304, 305, and 306, the judgment criteria are set by the control device (CPU), the captured image is observed while observing on the monitor, the evaluation items and parameters are set, accumulated, and the evaluation criteria are set by AI. Learn and establish. After learning with the initial teacher data is completed, the accuracy of AI judgment improves as data is accumulated through implementation.
Information processing is performed by the left AI controller 63L and the right AI controller 63R.

301 Shading Correction: Corrects uneven brightness and aberrations caused by the optical system in the line image obtained from the left short edge imaging means 61L.
302 Memory storage: Line images are sequentially stored on the memory.
303 Line image synthesis: Synthesize line images in chronological order to generate an image of a short buttress over the entire length.
304 Shake correction, warpage/curling detection: Correction of blur caused by shaking up and down when a product (plywood, etc.) is conveyed by a belt conveyor, correction of warpage/curling occurring in the product. Correction associated with vibration will be described later.
305 Tunnel detection: Detects tunnel-like, lack of original sheet, lack of core, chipping, etc. due to partial loss of layers. Evaluate the number and length.
306 Overlap detection: detects layer overlap. Evaluate the number and length.

FIG. 8 shows a flow chart 400 for comprehensive judgment.
In the comprehensive determination flow, the determination signals obtained in the long wood end determination flow 100, the front/back determination flow 200, and the short wood end determination flow 300 are interlocked to determine the long wood end, the short wood end, and the front/back surface. This is a step of making an overall judgment by integrating these.
For example, by sending the surface determination signal to the short butt end side, it is used to determine the width and length of the tunnel 21 and the recess signal on the surface side shown in FIG. 7(a). The swelling signal on the surface side and the overlap 20 shown in FIG. 6(a) can also be used to determine the width and length in the same manner.
For the determination of the edge that reflects and utilizes the signal of the surface and the edge of the edge, the determination criteria are set by the control device (CPU), and the captured image is observed while observing on the monitor to set the evaluation items and parameters. and accumulate it, let AI learn the evaluation criteria, and establish them. After learning with the initial teacher data is completed, the accuracy of AI judgment improves as data is accumulated through implementation.
This is also the case with the judgment of the surface reflecting Kiguchi's signal.
Enrichment through learning is planned.
Further, a comprehensive determination is made by synthesizing each element determination of the long edge determination, the short edge determination, and the front/back surface determination. For this comprehensive judgment as well, the judgment criteria are set by manual learning at first, and the accuracy of AI judgment is improved by accumulated proficiency learning during implementation.
Based on the information from the inspection device controllers of each part (left AI controller 33L, right AI controller 33R, front surface 43 of AI controller, rear surface 46 of AI controller, left AI controller 63L, right AI controller 63R), information processing is integrated. This is done by the decision controller 8 .

401 Long timber determination and front/back coordinate axis comparison: Compare the signal from the long timber determination (107) and the signal from the surface determination (213), and superimpose overlaps and tunnels on the target wood laminate with coordinate axes.
402 Determination of long wood end and front/back: Based on the processing of 401, the long wood end is determined by combining the imaging of the front and back and the long wood end.
403 Matching of short end data and front/back data: Compare the signal from the short end determination (307) and the signal from the surface determination (213) to superimpose overlaps and tunnels on the target wood laminate on the coordinate axes.
404 Determination of short butt and front and back: Based on the process of 403, the short butt is determined by combining the imaging of the front and back and the imaging of the long butt.
405 Comprehensive judgment: Comprehensive judgment based on the judgment of front and back in 213, the judgment of long buttocks in 402, and the judgment of short buttocks in 404. The plywood is graded into plywood A, plywood B, plywood C, etc., and is deposited at the locations of plywood A13, plywood B14, and plywood C15 shown in FIGS.

The device of the present invention will be described in more detail based on the plan view of the laminated wood inspection and sorting device SS shown in FIG.
The inspection and sorting device SS comprises an inspection device A and a sorting/stacking device B. As shown in FIG. The inspection device A and the sorting/accumulating device B are arranged in series and controlled by a general judgment controller 8 .
The laminated wood material inspection and sorting device SS continuously conveys the laminated wood material 9, inspects the laminated wood material 9 during transportation, evaluates the laminated wood material 9 based on the inspection results, and evaluates the laminated wood material 9. deposited according to.
In the inspection device A, the long butt end inspection device 30, the front/back side inspection device 40, and the short butt end inspection device 60 are successively arranged in this order. The order of inspection devices can be determined as appropriate.
The sorting/stacking device B includes a stacking device 10 that sorts the laminated wood materials 9 evaluated by inspection into three types of piled plywood A, piled plywood B, and piled plywood C according to the evaluation.
These inspections, sorting and stacking are continuously carried out while conveying the laminated wood material 9 by arranging the vertical conveying conveyor 1, the turning conveyor 4, the horizontal conveying conveyor 5 and the conveyor 11. FIG. Since the conveying direction of the long timber and the short timber is different, a direction changing conveyor is interposed between the vertical transportation and the horizontal transportation.
A general judgment controller 8 controls these transport devices, each inspection device, evaluation, sorting, and stacking.
The properties of the long wood end, the properties of the short wood end, and the properties of the front and back surfaces are captured separately, but since it is necessary to evaluate the same laminated wood material as a whole, detection by the material detectors 2 and 6 installed in the conveying device Based on the signal and the information of the encoders 3 and 7 provided in the conveying device, the respective imaging information can be compared to one sheet. In addition to this, a timer or the like can also be used for matching imaging information.

In the long wood end inspection device 30, the laminated wooden material 9 is transported by the vertical transport conveyor 1, and the detection signal detected by the material detector 2, the signal from the encoder 3, and the left and right image data signals are combined (long length Imaged data signals from the left edge imaging means 31L and right long edge imaging means 31R) are used by the left and right AI controllers (left AI controller 33L, right AI controller 33R) to determine the position information of the laminated wooden material (elapsed time since detection and transport speed). , which part of the laminated wood material corresponds to the imaged data) is specified and sent to the comprehensive determination controller 8 . Determination of the long buttock is performed according to the long buttock determination flow 100 using the imaging data of the long buttock.
This positional information is also specified by the front/back inspection device 40 and the short butt end inspection device 60, and by comparing these position information, the imaged data of the long and short end and the imaged data of the front and back of the wood laminate are obtained. It will be integrated into the material.

The laminated wooden material 9 is changed in its conveying direction in the orthogonal direction by the direction changing conveyor 4 and conveyed by the horizontal conveyer 5 . The horizontal transfer conveyor 5 is divided before and after the surface image pickup portion by the surface image pickup means into a horizontal carry-in conveyor 5A and a horizontal carry-out conveyor 5B. However, the conveying speeds of the horizontal carry-in conveyor 5A and the horizontal carry-out conveyor 5B are synchronized, and the material detector 6 and the encoder 7 can detect the position information of the wooden laminated material 9. FIG.
A material detector 6 is installed above the horizontal carry-in conveyor 5A to detect the wooden laminated material 9 being conveyed. An encoder 7 is attached to the drive shaft of the horizontal carry-in conveyor 5A, and the location (coordinates) of the laminated wood material 9 can be specified by the signal from the material detector 6 and the conveying signal from the encoder 7.

Between the horizontal carry-in conveyor 5A and the horizontal carry-out conveyor 5B, the surface imaging means 41 of the front/back inspection device 40, the reflected light illumination 42A, the oblique light illumination 42B, the rear surface imaging means 44, the left rear surface imaging means 44L, the right rear surface imaging means 44R, and the reflection An optical illumination 45A and an oblique illumination 45B are arranged. Imaging based on two types of illumination on these front and back surfaces is obtained by the imaging means for the front surface and the back surface. In this example, the imaging means are divided into left and right, and a left front imaging means 41L, a right front imaging means 41R, a left rear imaging means 44L, and a right rear imaging means 44R are arranged.
The imaging data obtained by the imaging means for the front and back sides undergo data processing of the front side by the AI controller front side 43, data processing of the back side by the AI controller back side 46, and determination of the front side according to the front/back determination flow 200. .

A short butt inspection device 60 is arranged above the horizontal unloading conveyor 5B.
The short butt end of the laminated wooden material 9 illuminated by the short butt end illumination 62 is imaged by the short butt end imaging means 61 . The lighting and imaging means are arranged on the left and right, and are composed of a left short butt imaging means 61L, a right short butt imaging means 61R, a left short butt lighting 62L, and a right short butt lighting 62R.
The imaging data is processed by AI controller left 63L and AI controller right 63R. Judgment of a short butt end is carried out in consideration of front and back data. Determination of a short butt is performed according to the short butt determination flow 300 .

Each of the long strip inspection device 30, the front and back inspection device 40, and the short strip inspection device 60 has an AI controller, but the general judgment controller 8 is responsible for information transmission between each device, general control of the equipment, and general judgment. there is
Using the respective determinations of the long timber determination flow 100, the front/back determination flow 200, and the short timber determination flow 300, a comprehensive determination of the laminated wood material 9 is performed based on the comprehensive determination flow 400, and the grade of the laminated wood material is determined. can be determined.
Based on the grade information of the laminated wood material, the stacking device 10 is controlled to sort and stack according to the grade.
Conveyors 11, 11, 11 of the stacking device 10 are controlled by the control of the general judgment controller 8, the laminated wood materials are stopped at the respective positions, and the stacked plywood A 13, the stacked plywood B 14, and the stacked plywood are started by starting the stacking bar 12. Deposited as C15.

<Correction of inspection images>
Regarding the surface image, it is described in [0025] that the finely divided linear images obtained by the line sensor in FIG. It is
As for the image of the butt end, similarly, images divided into fine lines are arranged to generate one continuous image for inspection of the laminated wood material.
In the image of the wood end, if the laminated wood material is warped or if the belt conveyor that is the transportation means vibrates, even if the divided images are arranged side by side, the image will be bent and distorted, resulting in a clear image for inspection. may not be obtained. We propose a technique for correcting this and creating a single continuous edge image to improve the accuracy of evaluation. Since the correction described below can be applied to both the long buttock image and the short buttock image, they are described without distinction.
This image correction is included in 104 (correction of long butt end) and 304 (correction of short butt end) in the flowchart shown in FIG.

An example of a distorted image is shown in FIG.
For example, when the conveyer for transportation vibrates, the laminated wood material also moves up and down, and the image of the butt end obtained by arranging the individual images (imaging of the individual line sensors) 81 obtained by the line sensor at that timing is shown in FIG. As shown in 9(a), a wavy and distorted composite edge image 70 is obtained. FIG. 9(b) shows a diagram divided into individual individual images 81 of the line sensor, which is the source of the distorted composite edge image 70. As shown in FIG.

FIG. 10 shows a method of obtaining a corrected image by correcting based on the surface line and center line.
Since the original laminated wood material of this distorted image is a flat plate with the same thickness, the individual images obtained by the line sensor also have the same thickness. Therefore, by adjusting and arranging the individual images according to the front side, the back side, or the center, the edge correction image 55 aligned in a straight line can be obtained.

FIG. 10(a) shows an example in which the surfaces of the individual images are rearranged according to the surface line 86 to form a primary edge correction image 71, which is a corrected image.
A diagram (1) in which individual images x1, x2, . . . xn obtained from the line sensor are arranged in time order is shown. The middle part of the image is wavy and distorted due to the vibration of the belt conveyor. A surface line 86 is set in order to rearrange the images in a straight line, and the surface of the individual images x1, x2, . The corrected image) 71 is shown in (2).
Since the laminated wood material is a flat plate, if the distorted images are rearranged based on some point, a linear image can be obtained, which can be used as a corrected image for inspection. However, if there is a defect in the surface layer, the second layer becomes the surface layer, and recesses appear in the lower layer, which is incorrect. If a concave portion appears in the lower layer in this way, secondary correction is further performed.

FIG. 10(b) shows an example in which the medians 85a of the individual images are rearranged along the center line 85 to form a primary edge correction image 71b.
(1) shows a diagram in which a center line 85 is set near the median value 85a of the individual images, and the individual images are rearranged according to the center line 85 to form a primary corrected image, ie, a cut edge corrected image 71b. An example is shown in (2). However, if there is a defect in the surface layer, concave portions appear at the top and bottom, which is incorrect. When concave portions appear at the top and bottom in this way, secondary correction is further performed.

FIG. 11 shows an example of two-stage correction.
If the correction is performed according to the line on the front surface, the portion with defects on the front and back surfaces will appear in the corrected image as a concave portion 74 on the lower side. FIG. 11A shows an example in which a concave portion is generated in the lower layer of the primary edge correction image corrected with the surface line as a reference. If the cut edge correction image 71 corrected in accordance with the surface line 86 has a defect in the surface layer, the defect appears as a concave portion 74 on the lower side.
The cut edge correction image 71 is a primary laminated wood material formed in five layers from a surface layer (first layer) to a back surface layer (fifth layer). A concave portion 74 is generated in the lower layer for surface matching. A reference image 87 is created by compressing the primary buttock correction image 71 in the longitudinal direction. Since the reference image 87 is obtained by superimposing the entire individual images, it is possible to construct a model of the butt end of the laminated wood material.
FIG. 11(b) shows the secondary correction for rearranging the images in accordance with the reference image 87. As shown in FIG.
In the concave portion 74, the second, third, fourth, and fifth layers match, but the first layer does not match. It will be corrected.

FIG. 11A shows an example in which the surface layer is missing in the primary edge correction image 71 corrected in accordance with the surface line 86 . The missing portion appears as a concave portion 74 on the lower side.
The primary cut edge correction image 71 is a laminated wood material formed in five layers from a surface layer (first layer) to a back surface layer (fifth layer). A concave portion 74 is generated in the lower layer for surface matching. A reference image 87 is created by compressing the primary buttock correction image 71 in the longitudinal direction. Since the reference image 87 is obtained by superimposing the entire individual images, it is possible to construct a model of the butt end of the laminated wood material.
FIG. 11B shows a secondary edge correction image 77 of secondary correction in which these images are rearranged according to the reference image 87 .
In the secondary edge correction image 77, in the concave portion 74, the second, third, fourth, and fifth layers match, and the first layer does not match. is corrected as the front plate missing portion 72 .

FIG. 12 shows an example of secondary correction of the primary edge correction image 71b that has undergone center line correction.
As shown in FIG. 12(a), in the primary buttock correction image 71b, recesses 72 and 76b are formed at the top and bottom when there is a defect in either the top or bottom layer. Focusing on the concave portions 72 and 76b and the front and rear portions, focusing on the surface layer or the back layer, correction is made so that the same layer is continuous to generate the secondary edge correction image 77b.
In this case, the back layer of the recess 72 is the recess back plate layer 76b, the left part is the front back plate layer 76a, and the right part is the rear back plate layer 76c, so the recess back plate layer 76b is lowered. After adjustment, as shown in FIG. 12(b), the top plate missing portion 72 appears as a recess on the surface layer side. This is used for evaluation as a secondary edge correction image 77b.

Regarding Laminated Wood Lumber A layered veneer on which layers of laminated wood lumber are formed is schematically shown in FIG. 13(a).
This laminated wood material is an example of a thick plywood laminated so that the fiber directions of the veneers are perpendicular to each other.
The wood fibers 27 are arranged in the growth direction of the tree, and from the relationship between the fiber direction and the cut surface of the tree, each surface of the layer veneer 22 shown in FIG. 25 and single plate straight mesh 26 .
A common layer can be recognized by paying attention to the veneer end 25 and the veneer straight mesh 26 appearing in the cross section of the wooden laminate on which the veneers are laminated.
Since the surface veneer square grain 26 has a smooth surface and the fibers are parallel to each other, the light appears as an image in which the light is often specularly reflected. Since the veneer edge 25 crossing the fibers has countless small unevennesses and diffusely reflects the light, the difference is conspicuous on the imaging screen.
FIG. 13(b) shows an example of a five-layer wood laminated material 9a in which five veneers are laminated so that the directions of the wood fibers are perpendicular to each other.
In the odd-numbered layer veneer 22, which constitutes 1st, 3rd, and 5th odd-numbered layers from the front surface 91a side, fibers run in the longitudinal direction. A veneer straight grain appears on the 92 side.
In the even-layered veneer 23 comprising two even layers and four layers, the veneer square grain appears on the short butt end 93 side, and the veneer butt end appears on the long butt end 92 side.
In the illustrated five-layer wood laminate 9a, a missing portion 22 is shown in the first layer. In the second correction, it is possible to easily adjust to a common layer structure by comparing with the reference image.
In addition, in the LVL, etc., in which plate materials such as lamina are laminated, the quality of the lamina is individually controlled, so it is rare that a part is damaged.

In this way, if there is distortion in the primary image obtained by synthesizing the image of the wood end obtained from the line sensor, the individual images are arranged in a continuous straight line, focusing on the surface layer, the back layer, the center, etc. A corrected image (primary corrected image) is generated and used as an image for inspection. If there is a dent in this corrected image, secondary correction is performed by arranging individual images in the dent and the reference image, or by comparing the front and back layers and making adjustments focusing on the common layer. A cut edge corrected image is generated and used as an image for inspection.
Accurate evaluation can be performed by performing the first correction and the second correction, and the evaluation accuracy is improved.
This correction is a technique that can be commonly applied to both long butt ends and short butt ends.

1 Vertical Conveyor 2 Material Detector 3 Encoder 4 Direction Change Conveyor 5 Horizontal Conveyor 5A Horizontal Carry-In Conveyor 5B Horizontal Carry-Out Conveyor 6 Material Detector 7 Encoder 8 Comprehensive Judgment Controller 9 Wooden Laminated Material 91 Front Surface 91a Front Surface 91b Back Surface 92 Long Kiguchi 93 Short Kiguchi

10 deposition device 11 conveyor 12 deposition bar 13 deposition plywood A
14 piled plywood B
15 piled plywood C
20 Overlapping 21 Tunnel 22 Layer veneer 24 Veneer cross grain 25 Veneer end 26 Veneer straight grain 27 Wood fiber

30 Long cut end inspection device 31 Long cut end imaging means 31L Long cut end imaging means left 31R Long cut end imaging means right 32 Long cut end lighting 32L Long cut end lighting left 32R Long cut end lighting right 33L AI controller left 33R AI controller right

40 Front and back inspection device 41 Front imaging means 41L Left front imaging means 41R Right front imaging means 42 Front illumination 42A Reflected light illumination 42B Oblique illumination 43 AI controller front surface 44 Back imaging means 44L Left back imaging means 44R Right back imaging means 45 Back illumination 45A Reflected light illumination 45B Oblique light illumination 46 Back of AI controller

51 Imaging 52 Separated image 52A Reflected light image separation 52B Oblique light image separation 53 Image generation 53A Reflected light image generation 53B Oblique light image generation 54 Image generation enlarged photograph 54A Reflected light image enlarged photograph 54B Oblique light image enlarged photograph 60 Short cut end inspection device 61 Short cut end Imaging means 61L Short end imaging means left 61R Short end imaging means right 62 Short end lighting 62L Short end lighting left 62R Short end end lighting right 63L AI controller left 63R AI controller right

70 Synthetic edge images 71, 71b Primary edge correction image 72 Top plate missing part 74 Recess 75 Top layer 76 Back plate layer 76b Recess back layer 76a Front back layer 76c Back back layer 77, 77b Secondary edge correction image 81 Individual image 85 Median line 85a Median value 86 Surface line

Claims (13)

A laminated wood material comprising a surface inspection device using vertical irradiation light and oblique irradiation light irradiated to the surface of the laminated wood material and a butt end inspection device utilizing the wood end irradiation light irradiated to the butt end of the laminated wood material. inspection equipment. 2. An inspection apparatus for a laminated wood material according to claim 1, wherein said surface inspection apparatus comprises an inspection apparatus for both front and back surfaces. The surface inspection device includes a vertical lighting means for irradiating the surface of the laminated wood material in a substantially vertical direction, an oblique light lighting means for obliquely irradiating the surface of the laminated wood material, and a surface imaging means,
The surface inspection device is characterized by separating a vertical light image and an oblique light image from the image data captured by the surface imaging device, and comparing both images of a common portion of the laminated wood material to determine the surface properties. 2. The apparatus for inspecting laminated wood materials according to claim 1. The butt inspection apparatus includes a long butt inspection apparatus including long butt lighting and long butt imaging means, and a short butt inspection apparatus including short butt lighting and short butt imaging means,
The long wood end inspection device judges the properties of the long wood end from the long wood end image,
The short butt inspection device determines the properties of the short butt from the image of the short butt.
2. The inspecting apparatus for laminated wood material according to claim 1, characterized in that: The long buttock inspection image or the short buttock inspection image is a long buttock corrected image obtained by rearranging the images captured by the long or short buttock imaging means or the short buttock imaging means and correcting them in the thickness direction of the laminated wood material, or 5. The apparatus for inspecting laminated wood lumber according to claim 4, wherein the short butt length correction image is used. If there is a part with a different thickness compared to the front and back in the corrected long or short buttock image, it is corrected so that it is common to the layer of that part by comparing it with the reference long or short buttock image. 6. The apparatus for inspecting laminated wood lumber according to claim 5, wherein the second long buttock corrected image or the second short buttock corrected image is used as an image for inspection. The surface inspection device judges the surface based on the information obtained by synchronizing the vertical light image and the oblique light image with the long buttock inspection image and the short buttock inspection image,
The long wood end inspection device determines the long wood end based on information obtained by synchronizing the image of the long wood end with the image of the surface inspection device,
The short butt inspection device judges the short butt on the basis of information obtained by synchronizing the image of the surface inspection device with the image of the short butt,
7. The apparatus for inspecting laminated wood lumber according to claim 4, wherein the comprehensive determination is based on surface determination, long wood end determination, and short wood end determination. 7. The laminated wood material inspection apparatus according to claim 1, wherein the laminated wood material is any one of plywood, LVL, LVB, CLT, and thick plywood. An inspection and sorting apparatus for laminated wood materials, comprising: the inspection apparatus for laminated wood materials according to any one of claims 1 to 6; An inspection and sorting apparatus for laminated wood materials, comprising: the inspection apparatus for laminated wood materials according to claim 7; The long strip inspection device, the surface inspection device, the short strip inspection device, and the stacking device are arranged in this order, and each of these devices is continuously connected by a transport device, and a general controller is provided to control these devices. An inspection and sorting device for laminated wood timber comprising:
The long wood end inspection device has a transport device that transports laminated wood in the vertical direction, a lighting device and an imaging device on the side of the transport device, and a material detector is installed above the transport device. , the transport device is provided with an encoder,
The surface inspection device includes a conveying device that conveys the laminated wood material in the horizontal direction, a lighting device and an imaging device that are provided above and below the conveying device, and a material detector that is provided above the conveying device. is provided with an encoder,
The illuminating device is provided with two types of reflected light illumination in which reflected light is incident almost perpendicularly to the imaging device and oblique illumination in which reflected light is emitted obliquely.
The short cut edge inspection device has a transport device that transports laminated wood in the horizontal direction, and a lighting device and an imaging device are provided on the side of the transport device.
The sorting device has a plurality of deposition devices, each deposition device being successively provided with a conveying device,
The integrated controller evaluates the laminated wood material based on the three inspections of the long wood end inspection device, the surface inspection device, and the short wood end inspection device, and deposits the wood laminated material in each stacking device of the sorting device according to the evaluation. An inspection and sorting device for laminated wood lumber, characterized by: The long buttock inspection apparatus further comprises means for forming a corrected long buttock corrected image by rearranging the captured images in the thickness direction of the laminated wood material,
12. The wood laminate according to claim 11, wherein the short butt inspection apparatus further comprises means for rearranging the captured images in the thickness direction of the wood laminate to form a corrected short butt correction image. Wood inspection and sorting equipment. If there is a portion with a different thickness compared to the front and back in the corrected long buttock image or the corrected short buttock image, it is compared with the long buttock image that serves as a reference or the short buttock image that serves as a reference, and the layers in that portion are common. 13. The apparatus for inspecting and sorting laminated wood lumber according to claim 12, wherein the second long buttock corrected image or the second short buttock corrected image corrected in the above manner is used as an image for inspection.

Images