Double-camera mechanism for simultaneously detecting defects and colors

Abstract

The utility model relates to the technical field of printing inspection equipment, and discloses a double-camera mechanism for simultaneously detecting defects and colors, which comprises a frame, a negative-pressure flattening component is arranged on the right side of the top of the frame, an imaging component is arranged above the negative-pressure flattening component, and the imaging component is arranged on the right side of the top of the frame. An image acquisition assembly and a chromaticity acquisition assembly are arranged on the left side of the top of the rack, the imaging assembly, the image acquisition assembly and the chromaticity acquisition assembly are located at the same horizontal height, and a first driving assembly used for longitudinally moving the image acquisition assembly and the chromaticity acquisition assembly is arranged on the rack; and the second driving assembly is used for transversely moving the negative pressure flattening assembly. According to the utility model, the first driving assembly drives the image acquisition assembly and the chromaticity acquisition assembly to switch so as to carry out contrast detection on the content and the color of a detected product, and compared with the scheme, the detection range of a printed matter is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of printing inspection equipment, and particularly relates to a dual-camera mechanism for simultaneously detecting defects and colors. Background Technique

[0002] In the printing process of printed matter, it is necessary to control the quality of the printed matter. There are two links in the quality control of printed matter: one is before printing, where the file content before and after editing is checked through the plate-making software to find errors in the file editing process. The other link is to collect high-precision images of the printed matter through an offline detection system and compare them with the PDF file to automatically check the integrity of the printed content, and printing defects such as plate scratches, missing characters, and incorrect text content can be found. At the same time, an offline detection system can also be used to randomly inspect the quality of printed products to prevent the generation of continuous waste products. Generally, an offline inspection machine is used for offline inspection of printed matter, and its working principle is to collect images of the printed matter through a camera and automatically detect the integrity of the printed content by comparing with the PDF file.

[0003] A printing quality offline inspection machine disclosed in the application number 202120982539.7 collects images reflected by a reflecting mirror through a camera and cooperates with the movement of a moving air suction mechanism to realize the detection of printed matter. However, the above solution can only detect the content defects of printed matter and cannot detect the content color of printed matter, and its detection range is small.

[0004] Therefore, we propose a dual-camera mechanism for simultaneously detecting defects and colors to solve the problems raised above. Content of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] Aiming at the deficiencies of the prior art in the above background technique, the purpose of the present utility model is to provide a dual-camera mechanism for simultaneously detecting defects and colors to solve the problems raised in the above background technique.

[0007] (2) Technical Solutions

[0008] To achieve the above purposes, the present utility model is realized through the following technical solutions:

[0009] A dual-camera mechanism for simultaneous detection of defects and colors, including a frame. A negative-pressure flattening component is arranged on the right side of the top of the frame. An imaging component is arranged above the negative-pressure flattening component. An image acquisition component and a chromaticity acquisition component are arranged on the left side of the top of the frame. The imaging component, the image acquisition component, and the chromaticity acquisition component are at the same horizontal height. A first driving component for longitudinally moving the image acquisition component and the chromaticity acquisition component, and a second driving component for laterally moving the negative-pressure flattening component are arranged on the frame.

[0010] Further, the imaging component includes a U-shaped frame and extension brackets symmetrically fixed on the top of the U-shaped frame. A reflecting mirror is inclined between the two extension brackets. Light sources with inclined inner-facing light-emitting ends are symmetrically arranged on the extension brackets. An imaging light area is formed at the overlapping part of the two light sources. The imaging light area is directly below the reflecting mirror.

[0011] Further, the bottom of the reflecting mirror is inclined 45° to the right.

[0012] Further, the image acquisition component includes a camera or a CIS image sensor, and the chromaticity acquisition component includes an imaging chromaticity meter. The light-entering lenses of the camera or the CIS image sensor and the imaging chromaticity meter are at the same height as the reflecting mirror.

[0013] Preferably, the first driving component includes first frame plates symmetrically fixed along the longitudinal direction on the top of the frame. A first lead screw is rotatably installed between the two first frame plates. Two first moving seats are threadedly connected to the first lead screw. Mounting brackets are arranged on the two first moving seats. The image acquisition component and the chromaticity acquisition component are respectively fixed on the two mounting brackets. A first driving motor for driving the first lead screw to rotate is arranged on one side of the first frame plate.

[0014] Further, the negative-pressure flattening component includes a flattening plate horizontally arranged on the top of the frame and an air duct opened inside the flattening plate. A plurality of air suction holes communicated with the air duct are evenly opened on the top of the flattening plate. An air suction pipe is arranged at the bottom of the flattening plate. One end of the air suction pipe away from the flattening plate is connected to an external air extraction fan.

[0015] Further, the second driving component includes second frame plates symmetrically fixed along the transverse direction inside the frame. A second lead screw is rotatably installed between the second frame plates. A second moving seat is threadedly connected to the second lead screw. The flattening plate is fixed on the top of the second moving seat. A second driving motor for driving the second lead screw to rotate is arranged on one side of the second frame plate.

[0016] Further, vertical plates are arranged on both the left and right sides of the negative-pressure flattening component. Proximity switches are arranged on one side of the two vertical plates close to the U-shaped frame.

[0017] Further, a magnetic scale is arranged on the rack in the transverse direction, and a reading head for reading the reading of the magnetic scale is arranged on one side of the flattening plate.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] The negative pressure flattening assembly flattens the printed matter placed thereon, and the second driving assembly drives the negative pressure flattening assembly to move horizontally. When moving to the left, driven by the first driving assembly, the image acquisition assembly is directly opposite to the imaging assembly, and the imaging assembly feeds back the content of the printed matter to the image acquisition assembly, and the image acquisition assembly compares and detects the content of the printed matter; when moving to the right, driven by the first driving assembly, the chromaticity acquisition assembly is directly opposite to the imaging assembly, and the color of the content of the test piece is compared and detected. Compared with the above scheme, the detection range of the printed matter is expanded. Description of the Drawings

[0021] Figure 1 It is a front view structural schematic diagram of the dual-camera mechanism for simultaneous detection of defects and colors of the present utility model;

[0022] Figure 2 It is a front view structural schematic diagram of the imaging assembly of the dual-camera mechanism for simultaneous detection of defects and colors of the present utility model;

[0023] Figure 3 It is a right view structural schematic diagram of the first driving assembly of the dual-camera mechanism for simultaneous detection of defects and colors of the present utility model;

[0024] Figure 4 It is a structural schematic diagram of the negative pressure flattening assembly of the dual-camera mechanism for simultaneous detection of defects and colors of the present utility model.

[0025] In the figure: rack 1, negative pressure flattening assembly 2, imaging assembly 3, U-shaped frame 31, extension bracket 32, mirror 33, light source 34, image acquisition assembly 4, chromaticity acquisition assembly 5, first driving assembly 6, first frame plate 61, first lead screw 62, first moving seat 63, mounting bracket 64, first driving motor 65, second driving assembly 7, vertical plate 8, proximity switch 9, reading head 10, magnetic scale 11. Detailed Embodiments

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-4 As shown in the figure, the present invention provides a dual-camera mechanism for simultaneous detection of defects and colors, including a frame 1, a negative-pressure flattening component 2, an imaging component 3, an image acquisition component 4, a chromaticity acquisition component 5, a first driving component 6, and a second driving component 7. The negative-pressure flattening component 2 is located on the upper right side of the top of the frame 1, used to place the printed matter and flatten it, and is driven by the second driving component 7 to move horizontally. The imaging component 3 is located above the negative-pressure flattening component 2, and its bottom is fixed on the frame 1, used to feedback the printed matter information to the image acquisition component 4 and the chromaticity acquisition component 5. The image acquisition component 4 and the chromaticity acquisition component 5 are used to acquire the content information and color information of the printed matter. The first driving component 6 is used to drive the movement and switching of the image acquisition component 4 and the chromaticity acquisition component 5, so that the two are spaced apart corresponding to the imaging component 3.

[0028] As Figure 4 shown, the negative-pressure flattening component 2 includes a flattening plate 21 horizontally arranged on the top of the frame 1, and a hollow structure is formed inside the flattening plate 21 to form an air duct 22. A plurality of air suction holes 23 communicating with the air duct 22 are evenly opened on the top of the flattening plate 21. An air suction pipe 24 is arranged at the bottom of the flattening plate 21. The air suction pipe 24 can be a telescopic pipe, such as a corrugated pipe, etc. One end of the air suction pipe 24 away from the flattening plate 21 is connected to an external air extraction fan.

[0029] During detection, place the printed matter on the top of the flattening plate 21, start the air extraction fan, form negative pressure in the air duct 22 through the air suction pipe 24, and firmly adsorb the printed matter on the flattening plate 21 through the air suction holes 23 to make it flat and prevent it from moving during the detection process, so as not to affect the detection result.

[0030] As Figure 2As shown, the imaging component 3 includes a U-shaped frame 31 and extension brackets 32 symmetrically fixed to the top of the U-shaped frame 31. A mirror 33 is arranged between the two extension brackets 32. The bottom of the mirror 33 is inclined 45° to the right. Light sources 34 with the light-emitting ends inclined inward are symmetrically arranged on the extension brackets 32. A strong light area is formed at the overlapping part of the two light sources 34, and the strong light area is located directly below the mirror 33. As Figure 1 and Figure 3 shown, the image acquisition component 4 includes a camera or a CIS image sensor, and the chromaticity acquisition component 5 includes an imaging colorimeter. The light inlet lenses of the camera or the CIS image sensor and the imaging colorimeter are at the same height as the mirror 33. Vertical plates 8 are arranged on both the left and right sides of the negative pressure flattening component 2, and proximity switches 9 are arranged on the sides of the two vertical plates close to the U-shaped frame 31.

[0031] In the initial state, the U-shaped frame 31 is located on the left side of the flattening plate 21, and the image acquisition component 4 is directly corresponding to the mirror 33. After starting, the flattening plate 21 moves to the left. A strong light area is formed at the overlapping part of the two light sources 34 to supplement light to the surface of the printed matter, and the mirror 33 reflects the image presented by the strong light area to the image acquisition component 4; when the second driving component 7 drives the flattening plate 21 to move to the left end, after the proximity switch 9 on the right vertical plate 8 detects the U-shaped frame 31 in contact, it feeds back its signal to the external control system, and the external control system controls the flattening plate 21 to stop moving. Subsequently, the external control system controls the first driving component 6 to start, switches the positions of the image acquisition component 4 and the chromaticity acquisition component 5, so that the chromaticity acquisition component 5 is directly corresponding to the mirror 33, and then controls the second driving component 7 to drive the flattening plate 21 to move to the right. Similarly, after the proximity switch 9 on the left vertical plate 8 detects the flattening plate 21 in contact, it feeds it back to the external control system, and the external control system controls the first driving component 6 to start, so that the image acquisition component 4 is directly corresponding to the mirror 33, and then controls the second driving component 7 to drive the U-shaped frame 31 to move to the left. The information collected by the image acquisition component 4 or the chromaticity acquisition component 5 is fed back to the external control system for comparison and detection; if only single content detection and comparison are required, the external control system debugging program can be used in advance to cut off the information feedback of the two proximity switches 9 to prevent the switching between the image acquisition component 4 and the chromaticity acquisition component 5. The connection between the image acquisition component 4 or the chromaticity acquisition component 5 and the external control system, the comparison of the external control system, and the external control system debugging program are all prior arts and will not be elaborated here.

[0032] As a preferred technical solution of the present utility model: As Figure 3As shown in the figure, the first driving component 6 includes a first frame plate 61 symmetrically and fixedly arranged at the top of the frame 1 along the longitudinal direction. A first lead screw 62 is rotatably installed between the two first frame plates 61. Two first moving seats 63 are threadedly connected to the first lead screw 62. Mounting frames 64 are arranged on both first moving seats 63. The image acquisition component 4 and the chromaticity acquisition component 5 are respectively fixed on the two mounting frames 64. A first driving motor 65 for driving the first lead screw 62 to rotate is arranged on one side of the first frame plate 61. As Figure 1 shown in the figure, the second driving component 7 includes second frame plates symmetrically and fixedly arranged in the frame 1 along the transverse direction. A second lead screw is rotatably installed between the second frame plates. A second moving seat is threadedly connected to the second lead screw. The bottom of the flattening plate 21 is fixed to the top of the second moving seat. A second driving motor for driving the second lead screw to rotate is arranged on one side of the second frame plate.

[0033] Both the first driving motor 65 and the second driving motor adopt servo motors or stepper motors. By the forward and reverse rotation of the first driving motor 65, the two first moving seats 63 are driven to move longitudinally, so as to realize the switching of the image acquisition component 4 and the chromaticity acquisition component 5; by the forward and reverse rotation of the second driving motor, the transverse movement of the negative pressure flattening component 2 is realized, so as to transmit and feedback the information of different positions of the test article.

[0034] As a preferred technical solution of the present invention: a magnetic grating ruler 11 is arranged on the frame 1 along the transverse direction. A reading head 10 for reading the reading of the magnetic grating ruler 11 is arranged on one side of the flattening plate 21. During the transverse movement of the flattening plate 21, the reading of the magnetic grating ruler 11 can be read by the reading head 10 to judge the content information of different positions of the test article transmitted by the imaging component 3.

[0035] For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations; for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dual-camera mechanism for simultaneous detection of defects and colors, comprising a frame (1), characterized in that: The frame (1), on the right side of the top of the frame (1), a negative pressure flattening component (2) is provided, above the negative pressure flattening component (2), an imaging component (3) is provided, on the left side of the top of the frame (1), an image acquisition component (4) and a chromaticity acquisition component (5) are provided, the imaging component (3), the image acquisition component (4) and the chromaticity acquisition component (5) are at the same horizontal height, on the frame (1), a first driving component (6) for longitudinally moving the image acquisition component (4) and the chromaticity acquisition component (5), and a second driving component (7) for laterally moving the negative pressure flattening component (2) are provided.

2. The dual-camera mechanism for simultaneous defect and color detection according to claim 1, wherein: The imaging component (3) includes a U-shaped frame (31) and extension brackets (32) symmetrically fixed on the top of the U-shaped frame (31), between the two extension brackets (32), a reflecting mirror (33) is obliquely arranged, on the extension brackets (32), light sources (34) with the light emitting ends inclined inward are symmetrically arranged, a strong light area is formed at the overlapping part of the two light sources (34), and the strong light area is directly below the reflecting mirror (33).

3. The dual-camera mechanism for simultaneous defect and color detection according to claim 2, characterized in that: The bottom of the reflecting mirror (33) is inclined 45° to the right.

4. The dual-camera mechanism for simultaneous defect and color detection according to claim 3, characterized in that: The image acquisition component (4) includes a camera or a CIS image sensor, the chromaticity acquisition component (5) includes an imaging chromaticity meter, and the light incident lenses of the camera or the CIS image sensor and the imaging chromaticity meter are at the same height as the reflecting mirror (33).

5. The dual-camera mechanism for simultaneous defect and color detection according to claim 4, wherein: The first driving component (6) includes first frame plates (61) symmetrically fixed on the top of the frame (1) along the longitudinal direction, between the two first frame plates (61), a first lead screw (62) is rotatably installed, on the first lead screw (62), two first moving seats (63) are threadedly connected, on both of the two first moving seats (63), mounting brackets (64) are provided, the image acquisition component (4) and the chromaticity acquisition component (5) are respectively fixed on the two mounting brackets (64), on one side of the first frame plate (61), a first driving motor (65) for driving the first lead screw (62) to rotate is provided.

6. The dual-camera mechanism for simultaneous defect and color detection according to claim 1, wherein: The negative pressure flattening component (2) includes a flattening plate (21) horizontally arranged on the top of the frame (1) and an air duct (22) opened inside the flattening plate (21), on the top of the flattening plate (21), a plurality of air suction holes (23) communicated with the air duct (22) are evenly opened, at the bottom of the flattening plate (21), an air suction pipe (24) is provided, and one end of the air suction pipe (24) away from the flattening plate (21) is connected to an external air extraction fan.

7. A dual-camera mechanism for simultaneous defect and color detection according to claim 6, characterized in that: The second driving component (7) includes second frame plates symmetrically fixed inside the frame (1) along the transverse direction, between the second frame plates, a second lead screw is rotatably installed, on the second lead screw, a second moving seat is threadedly connected, the flattening plate (21) is fixed on the top of the second moving seat, and on one side of the second frame plate, a second driving motor for driving the second lead screw to rotate is provided.

8. The dual-camera mechanism for simultaneous defect and color detection according to claim 7, characterized in that: On both the left and right sides of the negative pressure flattening component (2), vertical plates (8) are provided, and proximity switches (9) are provided on one side of the two vertical plates close to the U-shaped frame (31).

9. The dual-camera mechanism for simultaneous defect and color detection according to claim 6, characterized in that: A magnetic scale (11) is arranged on the frame (1) in the transverse direction, and a reading head (10) for reading the reading of the magnetic scale (11) is arranged on one side of the flattening plate (21).

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