A device for detecting edge collapse of wooden board

Abstract

The present invention provides a device for detecting chipped edges of wooden boards, comprising a shell, an upper platform extending outward from the top of the shell, a lower platform corresponding to the upper platform extending outward from the bottom of the shell, and a detection area through which a board can pass, a camera facing the detection area is provided above and below the detection area, each camera is provided with a light source irradiating the edge of the board close to the shell, and a shading unit is provided between the two light sources. The device for detecting chipped edges of wooden boards described in the present invention uses upper and lower cameras to simultaneously detect whether there is chipping on the edges of the upper and lower surfaces of the board; uses upper and lower light sources and provides a shading unit between the two light sources to prevent light from directly irradiating the camera in the opposite position while providing supplementary light for the camera; and adopts a method of arranging the light source between the camera and the shell so that the light source can irradiate the edge of the wooden board.

Description

Technical Field

[0001] The invention belongs to the field of detection equipment, and in particular relates to a device for detecting chipped edges of wooden boards. Background Art

[0002] In the processing of boards, especially wood boards, in order to ensure the appearance of the boards, it is usually necessary to apply paint on the boards and perform edge banding on the edges of the boards. The edge banding of the boards is to use adhesive to bond the edge banding strips to the side walls of the boards. However, in the process of edge banding, the amount of adhesive used is difficult to control, so that in the process of bonding the edge banding strips, the excess adhesive will overflow from the area where the side walls of the boards are located, thereby contaminating the surface of the boards.

[0003] Moreover, during the processing or edge banding of the wood board, the edge of the wood board is subjected to stress. At the same time, since the wood board is prone to vibration during the processing, the edge of the wood board is broken, resulting in damage to the edge of the wood board, affecting the flatness and appearance of the wood board.

[0004] Currently, upper and lower cameras are usually used to image the edges of wooden boards, and then the corresponding recognition system is used to determine whether there are defects on the edges of the wooden boards. During the camera imaging process, the edges of the wooden boards need to be supplemented with light. However, since the wooden boards are usually painted, the surface of the wooden boards is relatively smooth. After being irradiated with light, light spots are easily formed in the camera due to light reflection, resulting in poor image quality, which makes it easy for the subsequent recognition system to make misjudgments. Summary of the invention

[0005] In view of this, the present invention aims to provide a device for detecting chipping of wooden board edges, so as to detect whether there are chipping or stains on the edges of wooden boards.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A device for detecting chipped edges of wooden boards comprises a shell, an upper platform extending outward from the top of the shell, a lower platform corresponding to the upper platform extending outward from the bottom of the shell, and a detection area through which a board can pass is provided between the two platforms, an upper camera is fixedly provided on the lower surface of the upper platform, a lower camera is fixedly provided on the upper surface of the lower platform, and each camera is provided with a light source capable of irradiating the edge and part of the side of the board surface close to the side of the shell, a shading unit is provided between the two light sources, and the shading unit can block the upper light source from directly irradiating the lower camera and the lower light source from directly irradiating the upper camera.

[0008] Furthermore, an upper light source bearing plate is extended from the lower surface of the upper platform into the shell, a lower light source bearing plate is extended from the upper surface of the lower platform into the shell, and the two light sources are respectively arranged on the two light source bearing plates.

[0009] Furthermore, the shading unit is arranged between the two light source carrying plates, and the two light sources are arranged at one end of the two light source carrying plates close to the shading unit.

[0010] Furthermore, the shading unit includes an upper shading surface and a lower shading surface, one end of the upper shading surface is connected to the bottom end of the upper light source bearing plate and the other end extends in the direction of the detection area;

[0011] One end of the lower light shielding surface is connected to the top of the lower light source bearing plate, and the other end extends toward the detection area.

[0012] Furthermore, the upper shading surface and the lower shading surface are both diffuse reflection surfaces.

[0013] Furthermore, a switch bearing surface is provided between the outer ends of the two light source bearing plates, and a first proximity switch and a second proximity switch are provided on the switch bearing surface along the moving direction of the plate.

[0014] Furthermore, side panels are provided on both sides of the two light sources.

[0015] Furthermore, the upper camera is placed directly above the lower camera.

[0016] Furthermore, the straight line where the two cameras are located is placed between the two proximity switches.

[0017] Furthermore, the light sources are all light-emitting panels.

[0018] Compared with the prior art, the device for detecting edge chipping of a wooden board described in the present invention has the following advantages:

[0019] The present invention uses upper and lower cameras to simultaneously image the edges of the upper and lower surfaces of the sheet material, and uses upper and lower light sources to illuminate the surface of the sheet material, and the light sources simultaneously illuminate the edge of the surface of the sheet material and part of the side edges, so that an angle is formed between the light emitted by the light source and the light reflected by the surface of the sheet material and the light received by the camera, so as to ensure that the camera only absorbs the light diffusely reflected by the surface of the sheet material, and prevent the camera from receiving too much light to form a light spot;

[0020] A light shielding unit is provided between two light sources to prevent the light from directly irradiating the camera at the opposite position while supplementing the light for the camera;

[0021] The shading surface of the shading unit is tilted to prevent wood chips and dust in the processing workshop from accumulating on the shading surface and affecting the light source from irradiating the wooden board. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is the overall three-dimensional schematic diagram of the detection device;

[0024] Figure 2 It is a front view schematic diagram of the detection device;

[0025] Figure 3 It is a schematic side sectional view of the detection device.

[0026] Description of reference numerals:

[0027] 11-upper camera; 12-lower camera; 21-upper light source; 61-upper light source bearing plate; 22-lower light source; 62-lower light source bearing plate; 3-detection area; 5-shading unit; 51-upper shading surface; 52-lower shading surface; 53-switch bearing surface; 41-upper platform; 42-lower platform; 81-first proximity switch; 82-second proximity switch; 7-side panel; 9-fixing ear; 10-housing. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0031] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0032] like Figure 1 and Figure 3 As shown in combination, a device for detecting chipped edge of a wooden board includes a shell 10, wherein an upper camera 11 and a lower camera 12 are provided in the shell 10 for acquiring edge images of the upper and lower surfaces of the wooden board, a detection area 3 for accommodating the edge of the wooden board is left between the two cameras, and the photosensitive components of the two cameras are both facing the detection area 3, the upper camera 11 is provided at the upper part of the shell 10, and the lower camera 12 is provided at the lower part of the shell 10, the upper part of the shell 10 is provided with an upper light source 21 for supplementary light for the upper camera 11, and the lower part of the shell 10 is provided with a lower light source 22 for supplementary light for the lower camera 12, and the A shading unit 5 is provided between the upper light source 21 and the lower light source 22 to prevent the light of the upper light source 21 from affecting the image acquisition of the lower camera 12 and the light of the lower light source 22 from affecting the image acquisition of the upper camera 11, and when the edge of the wooden board passes through the zone, the two cameras are respectively arranged directly above the edge of the wooden board and directly below the edge of the wooden board, and the two light sources are arranged on the side of the camera close to the shell 10, or the light source is arranged on the side wall of the shell 10, irradiating the edge of the wooden board surface and part of the side of the wooden board from the side, so that the light cannot be reflected by the wooden board and directly irradiate into the photosensitive element of the camera, so as to prevent the appearance of light spots in the imaging;

[0033] Combination Figure 2 As shown, an upper platform 41 extends outward from the top of the housing 10, the upper camera 11 is fixed on the lower surface of the upper platform 41, and a lower platform 42 corresponding to the upper platform 41 extends from the bottom of the housing 10, and the photosensitive component of the lower camera 12 is fixed on the upper surface of the lower platform 42, and the two cameras are arranged oppositely or staggered;

[0034] like Figure 3 As shown, the lower surface of the upper platform 41 extends downwardly into the shell to form an upper light source 21 bearing surface, the upper light source 21 is arranged on the upper light source 21 bearing surface, and irradiates light toward the edge of the wooden board to be tested and the side of the wooden board; the lower surface of the upper platform 41 extends inwardly and downwardly to form a lower light source 22 bearing surface, the lower light source 22 is arranged on the lower light source 22 bearing surface, and irradiates light toward the edge of the wooden board to be tested, and the upper light source 21 and the lower light source 22 are both placed on the corresponding light source bearing plates and close to one end of the shading unit 5, so as to ensure the shading effect of the shading unit 5 and prevent light from scattering and directly irradiating into the camera, thereby affecting the camera from acquiring images;

[0035] The shading unit 5 includes an upper shading surface 51 and a lower shading surface 52. Optionally, the end of the upper light source supporting plate 61 extends the upper shading surface 51 downward toward the wooden board, and the end of the lower light source supporting plate 62 extends the lower shading surface 52 upward toward the wooden board, and the two shading surfaces are inclined so that wood chips and dust in processing can fall off naturally, and the device is more convenient to clean during work; or optionally, the two shading surfaces can also be parallel to each other and arranged between the two light sources. The two light sources illuminate the upper (lower) surface edge of the wooden board obliquely downward (upward), and an appropriate amount of gap is left between the two light sources and the two shading surfaces, so that light can shine on the wooden board without directly shining on the photosensitive element of the camera.

[0036] Optionally, a first proximity switch 81 and a second proximity switch 82 that can sense the wooden board are provided in the detection area 3 along the movement direction of the wooden board, and during the detection process, the wooden board passes through the first proximity switch 81, the upper and lower cameras 12, and the second proximity switch 82 in sequence, and the detection device is started and stopped by the proximity switch for sensing the wooden board, or optionally, the device is timed by the relative speed between the wooden board and the detection device and the length of the wooden board, so that the detection device automatically starts when a wooden board passes by and automatically stops after the wooden board passes by, or optionally, a manually controlled power supply is set to control the start and stop of the device;

[0037] A switch bearing surface 53 is disposed between the outer ends of the two light shielding surfaces, and the two proximity switches are disposed on the switch bearing surface 53 .

[0038] The angle between the upper shading surface 51 and the upper light source supporting plate 61 is less than 90°, and the angle between the lower shading surface 52 and the lower light source supporting plate 62 is less than 90°. The two shading surfaces are provided with diffuse reflection coatings or are treated with diffuse reflection to prevent light from being reflected into the camera.

[0039] The device for detecting chipped edge of a wooden board of the present invention further comprises fixing ears 9 arranged on both sides of the top of the housing 10 for fixing on a wall or production equipment.

[0040] The upper and lower light sources are both LED light panels, and side panels 7 are provided on both sides of the two light sources to prevent external light sources from affecting the camera and to block wood chips or dust generated by external processing.

[0041] The two cameras are arranged opposite to each other, and a straight line where the two cameras are located is placed between the two proximity switches.

[0042] The device for detecting chipped edge of a wooden board described in the present invention is as follows: during operation, a wooden board is moved into a detection area 3 by a transmission device, and the height of the wooden board is equal to the heights of the first and second approach switches. When the starting section of the wooden board passes through the first approach switch 81, the approach switch senses that the wooden board has passed, the device is started, and the wooden board passes through the detection area 3 under the movement of the conveyor belt. Two cameras acquire images of the edges of the upper and lower surfaces of the wooden board to facilitate subsequent image processing. In the process of acquiring the image, the edge of the wooden board is illuminated by two light sources to ensure sufficient light, and the two light sources simultaneously illuminate the edge of the board surface and part of the side edge, so that an angle is formed between the light emitted by the light source and the light reflected by the board surface and the light received by the camera, so as to ensure that the camera only absorbs the light diffusely reflected by the board surface, and prevent the camera from receiving too much light to form a light spot.

[0043] The wooden board edge chipping detection device described in the present invention can also be set on a robotic arm during operation, and the robotic arm drives the detection device to move as a whole, so that the edge of the wooden board moves relatively in the detection area 3 of the device to complete the detection.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for detecting edge collapse of a wooden board, characterized in that: The invention comprises a shell (10), an upper platform (41) extending outward from the top of the shell (10), a lower platform (42) corresponding to the upper platform (41) extending outward from the bottom of the shell (10), and a detection area (3) capable of passing a sheet of material is provided between the upper platform (41) and the lower platform (42), an upper camera (11) is fixedly provided on the lower surface of the upper platform (41), a lower camera (12) is fixedly provided on the upper surface of the lower platform, and an upper light source (21) and a lower light source (22) capable of irradiating the edge and part of the side of the sheet of material are provided on the upper camera (11) and the lower camera (12) on the side close to the shell (10), and a shading unit (5) is provided between the two light sources, and the shading unit (5) can prevent the upper light source (21) from directly irradiating the lower camera (12) and the lower light source (22) from directly irradiating the upper camera (11); The lower surface of the upper platform (41) extends obliquely into the shell to form an upper light source bearing plate (61), and the upper surface of the lower platform (42) extends obliquely into the shell to form a lower light source bearing plate (62), and the upper light source (21) and the lower light source (22) are respectively arranged on the upper light source bearing plate (61) and the lower light source bearing plate (62); The shading unit (5) is arranged between an upper light source bearing plate (61) and a lower light source bearing plate (62), and the upper light source (21) is arranged at one end of the upper light source bearing plate (61) close to the shading unit (5), and the lower light source (22) is arranged at one end of the lower light source bearing plate (62) close to the shading unit (5); The shading unit (5) comprises an upper shading surface (51) and a lower shading surface (52); one end of the upper shading surface (51) is connected to the bottom end of the upper light source bearing plate (61) and the other end extends obliquely toward the detection area (3); One end of the lower light shielding surface (52) is connected to the top of the lower light source supporting plate (62), and the other end extends obliquely toward the detection area (3); A switch bearing surface (53) is provided between the outer ends of the upper light source bearing plate (61) and the lower light source bearing plate (62), and a first approach switch (81) and a second approach switch (82) are provided on the switch bearing surface (53) along the moving direction of the sheet material.

2. A device for detecting edge collapse of a wooden board according to claim 1, characterized in that: The upper shading surface (51) and the lower shading surface (52) are diffuse reflection surfaces.

3. A device for detecting edge collapse of a wooden board according to claim 1, characterized in that: The upper camera (11) is placed directly above the lower camera (12).

4. A device for detecting edge collapse of a wooden board according to claim 3, characterized in that: The straight line where the two cameras are located is placed between the two proximity switches.

5. The device for detecting edge collapse of a wooden board according to claim 1, characterized in that: The upper light source (21) and the lower light source (22) are both light-emitting panels.

6. A device for detecting edge collapse of a wooden board according to claim 1, characterized in that: Side panels (7) are provided on both sides of the upper light source (21) and the lower light source (22).

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