Plate back image acquisition assembly of plate detection equipment

Abstract

The utility model discloses a panel back image acquisition assembly of panel detection equipment, which comprises a base bracket, a first conveyor belt and a second conveyor belt which are sequentially mounted on the base bracket from front to back, and a working space is reserved between the first conveyor belt and the second conveyor belt. The left side of the first conveying belt and the same side of the second conveying belt are connected through supports crossing the working distance, the two supports are fixedly connected with the two ends of a background belt support respectively, a background belt is arranged on the lower side face of the background belt support, and a line scanning camera is erected on the base bracket through a camera frame. The line scanning camera is arranged below the first conveying belt or the second conveying belt and can conduct line scanning imaging on the background belt through the working distance, a light source assembly is arranged beside the line scanning camera, and the light source assembly is fixedly arranged on the base bracket and can supplement light towards the background belt, so that the working efficiency of plate detection is improved; a better imaging environment can be realized, and the imaging precision is high.

Description

Technical Field

[0001] This utility model belongs to the field of visual inspection technology, and in particular relates to a board material inspection device, specifically a board back inspection component. Background Technology

[0002] Measuring the dimensions and surface defects of boards is a necessary step in board quality control. Currently, the furniture industry has increasingly higher requirements for the accuracy of board dimensions and surface defects verification. In the past, dimensions were generally measured manually and surface defects were observed with the naked eye. The measurement accuracy was limited, it was easy to miss defects, the manual labor intensity was high, the work efficiency was low, and the production cost of enterprises was high.

[0003] The development and maturation of random machine vision inspection technology has made the detection of board dimensions and defects through machine vision a growing trend in the field of board inspection technology. Traditional board inspection techniques involve inspecting both the front and back surfaces of the board. However, since boards have a hexahedral structure, defects may exist on each surface. Traditional inspection machines can only perform two-sided inspection and cannot observe all six surfaces. Patent CN107966102A discloses a six-sided inspection device for board production. This device uses CCD cameras positioned at corresponding positions on the front, back, top, bottom, left, and right sides of the board to acquire images of all six surfaces, and then calculates the board's contour parameters. However, this patent uses a static inspection method. When inspecting the top and bottom surfaces of the sheet material, the conveyor belt stops running, and the sheet material remains stationary. This means that when the CCD cameras on the top, bottom, left, and right sides are all fixed in the middle of the belt conveyor, the image acquisition range of the CCD cameras is limited because the distance and relative position between the CCD cameras and the sheet material are fixed. When the sheet material is long, the images acquired by the CCD cameras cannot cover the entire surface of the sheet material, creating blind spots and making the obtained parameters prone to deviation. Chinese patent CN 112362667 A discloses an improved six-sided inspection device for sheet material production. This device uses a four-sided rotating inspection mechanism to drive the camera to achieve the purpose of single-camera inspection of four surfaces of the sheet material, thereby reducing costs. Both of these devices inspect the sheet material in a static state, resulting in low inspection efficiency and failing to meet the requirements for sheet material inspection. Summary of the Invention

[0004] To address the technical problem of low efficiency and inability to meet board inspection requirements due to the static nature of current equipment, this invention provides a back-side image acquisition component for board inspection equipment. The component includes a base bracket, a first conveyor belt, and a second conveyor belt. The first and second conveyor belts are sequentially mounted on the base bracket, with a working gap between them. The left sides of the first and second conveyor belts are connected by a first bracket spanning the working gap, and the right sides of the first and second conveyor belts are connected by a second bracket spanning the working gap. The first and second brackets are respectively fixedly connected to both ends of a background belt bracket. A background belt is provided on the lower side of the background belt bracket. A line scan camera is mounted on the base bracket, positioned below either the first or second conveyor belt, and capable of scanning the background belt through the working gap. A light source assembly is located beside the line scan camera, fixedly mounted on the base bracket, and capable of providing supplemental lighting towards the background belt. The line scan camera begins imaging before the board enters the second conveyor belt. As the board passes through the working gap, the line scan camera scans and images the back side of the board, transmitting the image to the main board inspection equipment for back-side inspection.

[0005] Furthermore, a light-shielding plate is horizontally provided on the upper side of the background belt support. The width of the light-shielding plate is greater than the working distance between the first and second conveyor belts, and the downward projection area of ​​the light-shielding plate can cover the working distance area. The light-shielding plate serves to further block light, so as to prevent the image of the line scan camera from being interfered with by external light and affecting the accuracy.

[0006] Furthermore, two line scanning cameras are arranged side by side on the base bracket, and each pair of line scanning cameras is fixed on the base bracket by a camera bracket, which is suitable for inspecting the back of a wider sheet material.

[0007] Furthermore, it includes a slide, an angle adjuster, a connecting plate, and a camera mount. The slide is fixedly mounted on the base bracket, the angle adjuster is fixed on the slide, one end of the connecting plate is fixed to the angle adjuster, the camera mount is fixed to the other end of the connecting plate, and the line scan camera is mounted on the camera mount, allowing adjustment of the line scan camera's height and shooting angle.

[0008] Furthermore, a protective cover is provided next to the line scan camera, which is fixed on the base bracket. This structure prevents the line scan camera from being damaged by external factors.

[0009] Furthermore, a transparent dustproof component is fixedly installed on the protective cover. The dustproof component is a square sheet-shaped glass component, which serves to protect the camera from dust.

[0010] Furthermore, a dust scraper is installed on the upper surface of the dustproof component, and a motor is fixed on the base bracket via a motor mount. The motor is connected to the dust scraper via a third bracket, and the dust scraper cleans contaminants from the dustproof component.

[0011] Furthermore, a universal bamboo tube is fixed next to the online scanning camera. The universal bamboo tube is connected to an air pump through an air pipe and is used to blow air to remove dust from the dustproof components.

[0012] Furthermore, a transparent dustproof component is fitted onto the lens of the online scanning camera. This dustproof component is a lens-shaped glass component, which serves to protect the camera from dust.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the imaging of the back of the board is carried out during the board conveying process, which improves the working efficiency of board inspection; by setting the line scan background structure, a better imaging environment can be achieved, the imaging accuracy is high, and the line scan camera is protected against collision, dust, and dust removal. Attached Figure Description

[0014] Figure 1 The figure shown is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 The image shown is a partial exploded view of this utility model.

[0016] Figure 3 The image shown is a partial view of this utility model.

[0017] Figure 4 The diagram shown is of the line scan camera component in this utility model.

[0018] Figure 5 The diagram shown is a structural diagram of the camera frame of this utility model.

[0019] The components include: base bracket 1, first conveyor belt 2, second conveyor belt 3, first support 4-1, second support 4-2, background belt support 5, light shield 6, background belt 7, line scan camera 8, camera stand 9, protective cover 10, dustproof component 11, and universal bamboo tube 12. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood according to the specific circumstances. In this embodiment, the directions such as "upper," "lower," "left," "right," "front," and "rear" are explained with reference to the accompanying drawings or the actual working posture of the equipment to clarify their specific meaning in the present invention.

[0021] Existing six-sided board inspection equipment performs static inspections of boards, resulting in low inspection efficiency and failing to meet the required efficiency standards. In particular, existing equipment performs static inspections of the back of the board, which is inefficient and easily affected by external lighting, leading to low accuracy. This embodiment aims to provide a back-side image acquisition component for board inspection equipment to solve the problems of low efficiency and low accuracy in back-side board inspection.

[0022] Example 1, Reference Figure 1-Figure 2 In this embodiment, a back-side image acquisition component of a sheet metal inspection device includes a base bracket 1, a first conveyor belt 2, and a second conveyor belt 3. The first conveyor belt 2 and the second conveyor belt 3 are installed sequentially on the base bracket 1. The base bracket 1 provides stable support for the first conveyor belt 2 and the second conveyor belt 3. At the same time, it also serves as an indirect connection between the first conveyor belt 2 and the second conveyor belt 3, ensuring that the working distance between the first conveyor belt 2 and the second conveyor belt 3 does not change due to conveyor belt vibration. This prevents deformation of the structural components connected between the first conveyor belt 2 and the second conveyor belt 3, thus maintaining structural stability.

[0023] There is a working gap between the first conveyor belt 2 and the second conveyor belt 3. The left side of the first conveyor belt 2 and the left side of the second conveyor belt 3 are respectively fixedly connected to the two ends of the first bracket 4-1 spanning the working gap. The right side of the first conveyor belt 2 and the right side of the second conveyor belt 3 are respectively fixedly connected to the two ends of the second bracket 4-2 spanning the working gap. The first bracket 4-1 and the second bracket 4-2 are respectively fixedly connected to the two ends of the background belt bracket 5. The background belt bracket 5 is located above the working gap and can play the role of fixing the background belt and shielding light, without hindering the conveying of the material. The closer the width of the background belt bracket 5 is to the size of the working gap, the better the light shielding effect, providing a good background environment for line scanning. The lower side of the background belt bracket 5 is provided with a background belt 7, which is made of blue leather. The background belt bracket 5 is made of single-sided grooved profile, which provides a more stable support effect. Preferably, a light-shielding plate 6 is horizontally provided on the upper side of the background belt support 5. The setting of the light-shielding plate 6 further enhances the light-shielding effect, thereby reducing the amount of material used in the background belt support 5 and reducing costs. Preferably, the width of the light-shielding plate 6 is greater than the working distance between the first conveyor belt 2 and the second conveyor belt 3, and the downward projection area of ​​the light-shielding plate 6 can cover the working distance area, thereby achieving a better light-shielding effect.

[0024] The base bracket 1 is equipped with a line scan camera 8 via a camera holder 9. The line scan camera 8 is positioned below the first conveyor belt 2 or the second conveyor belt 3 to prevent wood chips from falling directly onto the line scan camera 8, thereby reducing interference with the camera's imaging. However, it is still impossible to completely prevent floating small wood chips from interfering with the line scan camera 8. The line scan camera 8 can perform line scan imaging of the background belt 7 through its working distance. A light source assembly is provided on the side of the line scan camera 8. The light source assembly is fixedly mounted on the base bracket 1 and can provide supplementary lighting to the background belt 7. The specific position of the light source assembly can be adjusted as needed. Preferably, the line scan camera 8 and the light source assembly are integrated devices, i.e., cameras with built-in supplementary lighting.

[0025] To enable the inspection of larger sheet materials, two line scanning cameras 8 are preferably arranged side by side on the base bracket 1, and each line scanning camera 8 is fixed on the base bracket 1 by a camera holder 9.

[0026] Since line scan cameras are expensive, in order to protect them from external impacts, it is preferable that a protective cover 10 is fixedly provided on the base bracket (1). The line scan camera 8 and the camera holder 9 are surrounded by the protective cover 10 but it does not affect the line scan imaging. The protective cover 10 is a semi-enclosed structure, similar to the shape of a C.

[0027] One specific embodiment of the camera mount 9 is as follows: Figure 5It includes a slide table 9-1, an angle adjuster 9-2, a connecting plate 9-3, and a camera mount 9-4. The slide table 9-1 is fixedly installed on the base bracket (1). The angle adjuster 9-2 is fixed on the slide table 9-1. One end of the connecting plate 9-3 is fixed on the angle adjuster 9-2. The camera mount 9-4 is fixed on the other end of the connecting plate 9-3. The line scan camera 8 is set on the camera mount 9-4. The angle adjuster 9-2 selects the Huaan XY axis manual arc angle stage. The slide table 9-1 can realize the up and down lifting of the line scan camera. The angle adjuster 9-2 can adjust the line scan angle of the line scan camera.

[0028] Example 2: In the above examples, the line scan camera 8 is easily attracted by dust or floating wood chips, which contaminates the lens, resulting in poor image quality and damage to the camera. Therefore, based on Example 1, as follows... Figure 4 He Ru Figure 4 A transparent dustproof component 11 is installed next to the online scanning camera 8.

[0029] The first specific dustproof method is to cover the lens of the online scanning camera 8 with a transparent dustproof component 11, which is a lens-shaped glass component. The second specific dustproof method is to fix a transparent dustproof component 11 on the protective cover 10, which is a square sheet-shaped glass component. The protective cover 10 serves to support and fix the dustproof component 11 in this case.

[0030] Example 3: Based on Example 2, in order to achieve the purpose of dust removal, this example also includes a dust removal device. The first implementation method is as follows: A universal bamboo-joint tube 12 is fixedly installed next to the online scanning camera 8. The universal bamboo-joint tube 12 is connected to an air pump via an air pipe. The universal bamboo-joint tube is fixedly installed on the protective cover 10 or the base bracket 1. A suitable existing installation method can be selected according to the situation. The universal bamboo-joint tube 12 can perform air blowing dust removal on the dustproof component 11.

[0031] In the second specific embodiment, a transparent dustproof component 11 is fixedly installed on the protective cover 10. The dustproof component is a square sheet-shaped glass component. A dust scraper is installed on the upper surface of the glass component. A motor is fixed on the base bracket 1 by a motor mount. The motor is connected to the dust scraper through a third bracket. The dust scraper can have a structure similar to a car windshield wiper or a brush structure.

[0032] The working principle of this utility model is as follows: Before the board enters the second conveyor belt, the line scan camera has already started imaging. When passing through the working gap, the line scan camera scans and images the back of the board and transmits the image to the main board inspection equipment to realize the back inspection of the board. The board imaging is carried out during the conveying process, which improves the work efficiency of the inspection. By setting the line scan background structure, a better imaging environment can be achieved and the imaging accuracy is high.

[0033] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this template.

[0034] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A back-side image acquisition component for a sheet metal inspection device, characterized in that, Includes a base bracket (1), a first conveyor belt (2), and a second conveyor belt (3). The first conveyor belt (2) and the second conveyor belt (3) are installed sequentially on the base bracket (1). There is a working gap between the first conveyor belt (2) and the second conveyor belt (3). The left side of the first conveyor belt (2) and the left side of the second conveyor belt (3) are connected by a first bracket (4-1) spanning the working gap. The right side of the first conveyor belt (2) and the right side of the second conveyor belt (3) are connected by a second bracket (4-2) spanning the working gap. 4-1) and the second bracket (4-2) are respectively fixedly connected to the two ends of the background belt bracket (5). The background belt bracket (5) has a background belt (7) on its lower side. The base bracket (1) is equipped with a line scan camera (8) via a camera bracket (9). The line scan camera (8) is located below the first conveyor belt (2) or the second conveyor belt (3) and can perform line scan imaging of the background belt (7) through the working distance. The side of the line scan camera (8) is equipped with a light source assembly. The light source assembly is fixedly installed on the base bracket (1) and can provide supplementary light to the background belt (7).

2. The back-side image acquisition component of a sheet metal inspection device as described in claim 1, characterized in that, The upper side of the background belt support (5) is provided with a light shield (6). The width of the light shield (6) is greater than the working distance between the first conveyor belt (2) and the second conveyor belt (3), and the downward projection area of ​​the light shield (6) can cover the area of ​​the working distance.

3. The back-side image acquisition component of a sheet metal inspection device as described in claim 1 or 2, characterized in that, Two line scanning cameras (8) are arranged side by side on the base bracket (1), and each line scanning camera (8) is fixed on the base bracket (1) by a camera holder (9).

4. The back-side image acquisition component of a sheet metal inspection device as described in claim 1 or 2, characterized in that, The camera mount (9) includes a slide (9-1), an angle adjuster (9-2), a connecting plate (9-3), and a camera base (9-4). The slide (9-1) is fixedly mounted on the base bracket (1), the angle adjuster (9-2) is fixed on the slide (9-1), one end of the connecting plate (9-3) is fixed on the angle adjuster (9-2), and the camera base (9-4) is fixed on the other end of the connecting plate (9-3). The line scan camera (8) is mounted on the camera base (9-4).

5. The back-side image acquisition component of a sheet metal inspection device as described in claim 1 or 2, characterized in that, A protective cover (10) is provided next to the line scan camera (8), and the protective cover (10) is fixed on the base bracket (1).

6. The back-side image acquisition component of a sheet metal inspection device as described in claim 5, characterized in that, A transparent dustproof component (11) is fixedly installed on the protective cover (10). The dustproof component is a square sheet-shaped glass component.

7. The back-side image acquisition component of a sheet metal inspection device as described in claim 6, characterized in that, A dust scraper is installed on the upper surface of the dustproof assembly (11), and a motor is fixed on the base bracket (1) by a motor mount. The motor is connected to the dust scraper by a third bracket.

8. The back-side image acquisition component of a sheet metal inspection device as described in claim 6, characterized in that, A universal bamboo tube (12) is fixed next to the online scanning camera (8). The universal bamboo tube (12) is connected to the air pump through the air pipe. The universal bamboo tube (12) is used to blow air to remove dust from the dustproof component (11).

9. The back-side image acquisition component of a sheet metal inspection device as described in claim 1 or 2, characterized in that, A transparent dustproof component (11) is fitted onto the lens of the online scanning camera (8). The dustproof component is a lens-shaped glass component.

10. The back-side image acquisition component of a sheet metal inspection device as described in claim 9, characterized in that, A universal bamboo tube (12) is fixed next to the online scanning camera (8). The universal bamboo tube (12) is connected to the air pump through the air pipe. The universal bamboo tube (12) is used to blow air to remove dust from the dustproof component (11).

Images