Plate visual image acquisition device

Abstract

The utility model discloses a plate visual image acquisition device, relates to the technical field of image acquisition in industrial detection equipment, aims to solve the problems of low efficiency, insufficient accuracy and high possibility of fatigue in traditional manual detection, and is used for shooting from multiple angles to obtain more complete plate defect information so as to facilitate plate quality grading. The device comprises a high-angle shooting camera, a mounting rack and a movable shooting rack, the movable photographer is installed on the installation frame, the high-angle shooting camera is installed on the movable photographing frame, plates can be conveyed to the position below the installation frame through the conveying device, the movable photographing frame is driven by the power system to move front and back on the installation frame, and the plates are photographed from multiple angles. On one hand, pictures at different angles can be stacked and synthesized into a clearer picture, on the other hand, if shooting is carried out at a single angle, defect misjudgment possibly exists, and subsequent quality grading is influenced, and through shooting comparison at multiple angles, the probability of misjudgment of the plate defect can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the image acquisition technical field in industrial detection equipment especially relates to a plate visual image acquisition device. BACKGROUND

[0002] Rotary cut plate needs manual quality detection and grading before use, which is a very intensive labor. The knots and shadow parts on the rotary cut plate are counted by artificial eyes. It is very easy to cause eye fatigue and low efficiency, usually 12-15 seconds per piece, about 5 pieces per minute, skilled workers can screen 8-10 pieces per minute, but cannot work continuously for a long time. At present, manual counting of knots and defects cannot generate accurate quantitative detection results conforming to industry standards, which may cause grading errors and affect product quality.

[0003] Surface defect detection based on machine vision will be the main direction of future research and development. At present, in the rotary cut plate quality inspection and grading process, on the one hand, the imaging quality of the image acquisition device is poor and the acquired information is incomplete, on the other hand, the defect detection content on the surface of the rotary cut plate includes natural defects such as blunt slag, wood brush, knots, cracks, decay, mildew, insect eyes, scars, separation, cutting marks, and defects caused in the processing process, and the detection objects are various and the surface defect types are various. In addition to solving the intelligent recognition algorithm, the supporting visual image acquisition device also needs to be improved according to the situation of the plate defects.

[0004] Therefore, it is necessary to design a plate visual image acquisition device for shooting from multiple angles to obtain more complete plate defect information, which is convenient for plate quality grading. UTILITY MODEL CONTENT

[0005] In view of the above shortcomings, the utility model provides a plate visual image acquisition device which can shoot from multiple angles to obtain more complete plate defect information, and facilitate subsequent plate quality grading.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A plate visual image acquisition device, comprising a downward shooting camera, a mounting frame and a mobile camera stand;

[0008] The mounting frame comprises a mounting plate, a first sliding rail and a rack, and the mounting plate is provided with a first sliding groove at the central axis;

[0009] The first sliding rail has two parts, which are symmetrically arranged on both sides of the central axis of the upper surface of the mounting plate, and the rack is fixedly arranged on the upper surface of the mounting plate and located between the two first sliding rails;

[0010] The mobile photography frame comprises a support, first sliding blocks, a gear, a first motor, a connecting rod and a low-angle shooting base, the first sliding blocks are two, the two first sliding blocks are slidably arranged on two first sliding rails in one-to-one correspondence, the support is fixedly connected to the first sliding blocks, the first motor is fixedly connected to the upper surface of the support and the rotating shaft of the first motor penetrates through the support, the connecting rod is fixedly connected to the rotating shaft of the first motor and penetrates through the first sliding groove on the mounting plate downward, the gear is fixedly connected to the connecting rod and meshes with the gear rack, the low-angle shooting base is movably arranged at the lower portion of the connecting rod, and the low-angle shooting camera is mounted at the lower portion of the low-angle shooting base.

[0011] Preferably, the mounting frame is further provided with second sliding rails, the second sliding rails are two and symmetrically arranged on the two sides of the central axis of the lower surface of the mounting plate, the low-angle shooting base is provided with second sliding blocks on the two sides, and the low-angle shooting base is slidably arranged on the second sliding rails through the second sliding blocks.

[0012] Preferably, the mounting frame further comprises first limiting blocks, the first limiting blocks are two and fixedly arranged at the two ends of the gear rod.

[0013] Preferably, the mobile photography frame further comprises a side shooting base, a sliding component and a side shooting camera, the mounting plate is further provided with second sliding grooves, the second sliding grooves are two and axially symmetrically arranged on the two sides of the mounting plate, the support is provided with connecting plates on the two sides, the connecting plates penetrate through the second sliding grooves and extend out of the lower surface of the mounting plate, the sliding component is mounted on the connecting plates, the side shooting base is slidably arranged on the sliding component, and the side shooting camera is mounted on the side shooting base.

[0014] Preferably, the first limiting blocks are further provided with photoelectric switches, and the photoelectric switches are arranged on the upper portions of the limiting blocks.

[0015] Preferably, the sliding component comprises third sliding rails and third sliding blocks, the third sliding rails are two and axially symmetrically arranged on the two sides of the connecting plates, the third sliding blocks are two and slidably arranged on the third sliding rails in one-to-one correspondence, and the side shooting base is fixedly connected to the third sliding blocks.

[0016] Preferably, the support is further provided with lifting components, the lifting components comprise second motors and lead screws, the second motors are two and symmetrically arranged on the upper surfaces of the two ends of the support, the rotating shafts of the second motors penetrate through the support, the lead screws are fixedly connected to the rotating shafts of the second motors, and the side shooting base is further provided with nuts, and the nuts are matched and arranged on the lead screws.

[0017] Preferably, the connecting plates are further provided with second limiting blocks, the second limiting blocks are two and fixedly connected to the connecting plates and located at the two ends of the third sliding rails.

[0018] Preferably, the second limiting blocks are further provided with photoelectric switches, and the photoelectric switches are arranged on the upper portions of the limiting blocks.

[0019] Compared with the prior art, the mobile photography frame has the following beneficial effects:

[0020] 1. The device comprises a low-angle camera, a mounting frame and a mobile photography frame; the mobile photographer is installed on the mounting frame, the low-angle camera is installed on the mobile photography frame, the board is conveyed to the lower side of the mounting frame through the conveying device, the mobile photography frame is driven by the power system to move back and forth on the mounting frame, and the board is photographed from multiple angles, on the one hand, clearer pictures can be stacked and synthesized through pictures of different angles, and on the other hand, if single-angle shooting is performed, there may be defects and misjudgments, which affect subsequent quality grading, and through multiple-angle shooting comparison, the probability of misjudgment of the board defects can be reduced.

[0021] 2. The device further comprises a side camera, which is installed on both sides of the mobile photography frame and cooperates with the low-angle camera to form a stereoscopic image acquisition system. This design enables the device to capture more details of the board, including edge cracks, edge warping and other easily overlooked defects. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description.

[0023] Figure 1 It is a schematic view of the overall structure of the present application;

[0024] Figure 2 It is a front view of the present application Figure 1 ;

[0025] Figure 3 It is a view from the lower left side of the present application Figure 1 ;

[0026] Figure 4 It is an enlarged view of A of the present application Figure 3 ;

[0027] Figure 5 It is a schematic view of the overall structure of the side shooting base of the present application.

[0028] Fig. 1, mounting plate; 101, first sliding groove; 102, second sliding groove; 2, support; 3, rack; 4, first sliding rail; 5, first motor; 6, gear; 7, first sliding block; 8, low-angle base; 9, low-angle camera; 10, second sliding rail; 11, second sliding block; 12, connecting rod; 13, second motor; 14, connecting plate; 15, first limiting block; 16, third sliding rail; 17, side shooting base; 18, third sliding block; 19, second limiting block; 20, screw rod; 21, nut; 22, side camera. DETAILED DESCRIPTION

[0029] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0032] The present application provides a kind of plate visual image acquisition device, to solve the problem of low efficiency, insufficient accuracy and easy to produce fatigue of traditional manual detection, to obtain more complete plate defect information from multiple angles, facilitate plate quality classification.

[0033] As Figures 1-5 As shown in a kind of plate visual image acquisition device, including overhead camera 9, mounting bracket and mobile photography frame;

[0034] The mounting bracket includes a mounting plate 1, a first sliding rail 4, a second sliding rail 10 and a rack 3, the first sliding groove 101 is provided in the axis of the mounting plate 1, the first sliding groove 101 is used to provide guiding function for mobile photography frame, the first sliding groove 101 is designed to be moderately wide and narrow, which can minimize mechanical resistance and ensure smooth operation of the connecting parts.

[0035] The first slide rail 4 has two, symmetrically arranged on both sides of the central axis of the upper surface of the mounting plate 1, enhancing the overall balance of the device. The rack 3 is fixedly arranged on the upper surface of the mounting plate 1 and located inside the two first slide rails 4.

[0036] The mobile photography frame includes a bracket 2, two first sliding blocks 7, a gear 6, a first motor 5, a connecting rod 12, and a low-angle shooting base 8. The two first sliding blocks 7 are slidably arranged on the two first slide rails 4, respectively. The bracket 2 is fixedly connected to the first sliding block 7. The first motor 5 is fixedly connected to the upper surface of the bracket 2, and the rotating shaft of the first motor 5 penetrates through the bracket 2. The connecting rod 12 is fixedly connected to the rotating shaft of the first motor 5 and penetrates through the first sliding groove 101 on the mounting plate 1. The gear 6 is engaged with the rack 3 and is fixedly connected to the connecting rod 12. The engagement transmission mode of the gear 6 and the rack 3 makes the motion control of the device more stable and reliable, and can realize high-precision positioning and repeated movement operation. The low-angle shooting base 8, as a direct carrier of the photography equipment, is movably connected to the lower part of the connecting rod 12. As can be easily known, in order to avoid the low-angle shooting base rotating with the connecting rod, the connection mode between the low-angle shooting base and the connecting rod is bearing connection. The low-angle shooting camera 9 is fixedly installed at the lower part of the low-angle shooting base 8 for shooting pictures of the board. In actual operation, the board will be conveyed to the lower part of the mounting frame by a conveying device. The first motor 5 rotates to drive the gear 6 to rotate. The rack 3 provides force for the device, so that the low-angle shooting base 8 carrying the low-angle shooting camera 9 can move back and forth along the first sliding groove 101 to shoot the board from multiple angles. On the one hand, the pictures from different angles can be stacked to synthesize clearer pictures. On the other hand, if shooting is performed from a single angle, there may be defects in the judgment, which affects the subsequent quality grading. Through comparison of shooting from multiple angles, the probability of defect misjudgment of the board can be reduced.

[0037] In the preferred embodiment, in order to further improve the stability of the device, the second slide rail 10 structure is added to the mounting frame in the preferred design to prevent the low-angle shooting base 8 from rotating due to the driving of the connecting rod 12 when the first motor 5 is running, thereby affecting the shooting effect. The lower surface of the mounting frame of the device is symmetrically provided with two second slide rails 10 on both sides of the central axis. The low-angle shooting base 8 is provided with two second sliding blocks 11 on both sides, respectively. The second sliding block 11 is tightly fitted with the second slide rail 10, so that the low-angle shooting base 8 can stably slide on the second slide rail 10, and at the same time, it is effectively limited to avoid the rotation of the low-angle shooting base 8.

[0038] In the preferred embodiment, in order to further improve the safety of the device, the first limiting block 15 structure is added to the mounting frame to effectively limit the sliding range of the mobile photography frame and prevent it from affecting the equipment operation beyond the set range. Specifically, the rack 3 of the mounting frame is fixedly provided with two first limiting blocks 15 at both ends, which are made of rigid materials to ensure their durability and strength. To achieve automatic control and protection, the upper part of each first limiting block 15 is also equipped with a photoelectric switch. When the mobile photography frame contacts the photoelectric switch, the photoelectric switch can accurately sense and send a signal to the control system, triggering a stop or rollback instruction, thereby effectively avoiding the misoperation or mechanical impact of the mobile mechanism.

[0039] In the preferred embodiment, in order to further improve the image acquisition coverage and comprehensiveness of defect detection of the device, the side shooting function is added to the mobile photography support 2 in the preferred design, including a side shooting base 17, a sliding component, and a side shooting camera 22. Two second sliding grooves 102 are symmetrically arranged on both sides of the mounting plate 1, which provide guidance for the sliding of the side shooting assembly. The support 2 is respectively provided with a connecting plate 14 on both sides, which extends out of the lower surface of the mounting plate 1 through the second sliding groove 102. The sliding component is installed on the connecting plate 14 to ensure that the side shooting assembly can move flexibly and smoothly. The side shooting base 17 is slidably arranged on the sliding component and can be adjusted in position to achieve multi-angle side shooting, further improving the detection capability of the edge and side defects of the plate surface. The side shooting camera 22 is installed on the side shooting base 17 and cooperates with the overhead shooting camera 9 to form a stereoscopic image acquisition system. This design enables the device to capture more details of the plate, including edge cracks, edge warping, and other easily overlooked defects, thereby providing more comprehensive data support for subsequent intelligent detection algorithms and improving the accuracy and reliability of detection.

[0040] In the preferred embodiment, the sliding component is composed of a third sliding rail 16 and a third sliding block 18. The third sliding rail 16 has two parts, which are symmetrically arranged on both sides of the connecting plate 14 to provide bidirectional support and ensure the stability of the side shooting assembly during sliding. Each third sliding rail 16 is correspondingly provided with a third sliding block 18, which tightly fits with the third sliding rail 16 and smoothly slides. The side shooting base 17 is firmly fixed on the two third sliding blocks 18 and can be precisely adjusted in position with the guidance of the third sliding rail 16, meeting the flexible shooting requirements of the side shooting camera 22 in different areas.

[0041] In the preferred embodiment, in order to further enhance the flexibility and adaptability of the device, it is preferred to design the lifting component on the bracket 2 to adjust the vertical position of the side shooting base 17 and the side shooting camera 22 to meet the shooting requirements of different heights. The lifting component includes two second motors 13 and a corresponding screw rod 20 structure. The two second motors 13 are symmetrically arranged on the upper surface of the two ends of the bracket 2 to ensure the stability and synchronization of the lifting action. The rotating shaft of the second motor 13 penetrates the bracket 2 and is firmly connected with the screw rod 20. The side of the side shooting base 17 is designed with a nut 21 structure, which is precisely threaded with the screw rod 20, and can realize the lifting adjustment of the side shooting base 17 through the rotation of the screw rod 20. When the second motor 13 drives the screw rod 20 to rotate, the nut 21 moves up and down, thereby driving the side shooting base 17 to complete the position adjustment in the vertical direction.

[0042] In the preferred embodiment, in order to improve the safety and precision control of the side shooting assembly, it is preferred to add a second limiting block 19 and a photoelectric switch structure on the connecting plate 14 to effectively constrain the sliding range of the side shooting base 17 and prevent it from exceeding the preset range. The second limiting block 19 has two blocks, which are fixedly arranged at the two ends of the connecting plate 14 and located at the end position of the third sliding rail 16. They are made of high-strength materials to enhance durability and impact resistance. These limiting blocks not only have the function of mechanical limiting, but also have photoelectric switches installed on their upper parts, which are used to transmit the stop or rollback command to the control system when the sliding block hits the photoelectric switch, to avoid mechanical impact or abnormal displacement caused by the overrunning of the sliding block.

[0043] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed by the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A device for acquiring visual images of a board, comprising a downward-looking camera (9), characterized in that: It also includes a mounting rack and a mobile photography rack; The mounting rack comprises a mounting plate (1), a first sliding rail (4) and a rack (3), the mounting plate (1) is provided with a first sliding groove (101) at the axis, the first sliding rail (4) has two parts and is symmetrically arranged on the upper surface of the mounting plate (1) on both sides of the axis, and the rack (3) is fixedly arranged on the upper surface of the mounting plate (1) between the two first sliding rails (4); The mobile photography rack comprises a support (2), a first sliding block (7), a gear (6), a first motor (5), a connecting rod (12) and a low-angle shooting base (8), the first sliding block (7) has two parts, the two first sliding blocks (7) are correspondingly and slidably arranged on the two first sliding rails (4), the support (2) is fixedly connected to the first sliding block (7), the first motor (5) is fixedly connected to the support (2) and the rotating shaft of the first motor (5) penetrates through the support (2), the connecting rod (12) is fixedly connected to the rotating shaft of the first motor (5) and penetrates downward through the first sliding groove (101) on the mounting plate (1), the gear (6) is fixedly connected to the connecting rod (12) and meshes with the rack (3), the low-angle shooting base (8) is movably arranged at the lower part of the connecting rod (12), and the low-angle shooting camera (9) is arranged at the lower part of the low-angle shooting base (8); The mounting plate (1) is further provided with a second sliding groove (102), the second sliding groove (102) has two parts and is symmetrically arranged on both sides of the mounting plate (1), the support (2) is provided with a connecting plate (14) on both sides, and the connecting plate (14) penetrates through the second sliding groove (102) and extends out of the lower surface of the mounting plate (1); The mobile photography rack further comprises a side shooting base (17), a sliding component and a side shooting camera (22), the sliding component is arranged on the connecting plate (14), the side shooting base (17) is slidably arranged on the sliding component, and the side shooting camera (22) is arranged on the side shooting base (17); The support (2) is further provided with a lifting component, the lifting component comprises a second motor (13) and a lead screw (20), the second motor (13) has two parts and is symmetrically arranged on the upper surface of the support (2), the rotating shaft of the second motor (13) penetrates through the support (2), the lead screw (20) is fixedly connected to the rotating shaft of the second motor (13), and the side shooting base (17) is further provided with a nut (21) which is matched and arranged on the lead screw (20).

2. The apparatus according to claim 1, wherein: The mounting rack is further provided with a second sliding rail (10), the second sliding rail (10) has two parts and is symmetrically arranged on both sides of the axis of the lower surface of the mounting plate (1), and the low-angle shooting base (8) is provided with a second sliding block (11) on both sides, and the low-angle shooting base (8) is slidably arranged on the second sliding rail (10) through the second sliding block (11).

3. The apparatus according to claim 1, wherein: The mounting frame further comprises first limiting blocks (15), two of which are fixedly arranged at two ends of the rack (3).

4. The visual image acquisition device for a board according to claim 1, characterized in that: The sliding component comprises third sliding rails (16) and third sliding blocks (18), two of the third sliding rails (16) are symmetrically arranged at two sides of the connecting plate (14), and two of the third sliding blocks (18) are correspondingly and slidably arranged on the third sliding rails (16), and the side shooting base (17) is fixedly connected to the third sliding blocks (18).

5. The apparatus according to claim 4, wherein: The connecting plate (14) is further provided with second limiting blocks (19), two of which are fixedly connected to the connecting plate (14) and located at two ends of the third sliding rails (16).

6. The apparatus according to claim 5, wherein: The second limiting blocks (19) are further provided with photoelectric switches, which are arranged on upper portions of the second limiting blocks (19).

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