Online printed matter detection device

Abstract

The invention provides a printed matter online detection device, and relates to the technical field of new material detection. The printed matter on-line detection device comprises a visual detection mechanism connected to the inner top of a detection camera obscura; the positioning box is connected to the upper belt surface of the belt conveyor so as to transport the positioning box to a detection position, the detection position directly faces the visual detection mechanism, the positioning box comprises a box body and a rubber plate, the top of the box body is provided with an opening, the rubber plate is connected to the opening so as to form a deformable cavity with the box body, and when the air pressure of the deformable cavity is increased, the rubber plate protrudes to enable the rubber plate to be in contact with the deformable cavity. And when the air pressure of the deformable cavity is reduced, the rubber plate is sunken. According to the method, the coating is subjected to tensile stress when the brush electronic tag adopting the nano coating technology is bent upwards and is subjected to compressive stress when the brush electronic tag is bent downwards, the visual detection mechanism can capture the problems of coating microcrack propagation paths, interface layering tendency and the like caused by the stress, and failure mechanism analysis of the nano coating under the bending working condition is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new material detection, in particular to a printed matter online detection device. BACKGROUND

[0002] With the rapid development of flexible electronics industry, printed electronic tags (such as RFID) using nano coating technology are widely used in intelligent packaging, wearable devices and other fields due to their excellent conductivity, bending resistance and environmental adaptability. The core performance of such tags depends on the interfacial bonding strength and fatigue resistance of the nano coating (such as nano silver particles, carbon nanotube composite layer).

[0003] Existing detection devices are mostly limited to static planar detection, which can only identify surface scratches or open circuits and other macroscopic defects, and cannot capture the hidden failure mechanism of nano coating under real bending conditions. Especially in the new material research and production quality control link, there is a lack of online analysis capability for material failure mechanism under dynamic stress, which has become a technical bottleneck restricting the yield improvement of the industry. SUMMARY

[0004] To solve the above problems, the present application provides a printed matter online detection device.

[0005] The present application provides a printed matter online detection device, comprising: A detection dark box is provided with a box opening on both sides; A visual detection mechanism is connected to the inner top of the detection dark box; A belt conveyor is provided in the detection dark box, and the two ends respectively pass out from the corresponding box opening; A positioning box is connected to the upper belt surface of the belt conveyor to transport the positioning box to a detection position opposite the visual detection mechanism, wherein the positioning box comprises a box body and a rubber plate, the top of the box body is open, and the rubber plate is connected to the opening to form a deformable cavity with the box body, when the air pressure of the deformable cavity increases, the rubber plate rises, and when the air pressure of the deformable cavity decreases, the rubber plate sinks; Two groups of light shielding mechanisms are respectively provided on the two box openings, and when the positioning box is in the detection position, the light shielding mechanism shields the corresponding box opening.

[0006] Optionally, the visual detection mechanism comprises a CCD camera and a ring-shaped light supplementing lamp, the CCD camera and the ring-shaped light supplementing lamp are both connected to the inner top surface of the detection dark box, and the ring-shaped light supplementing lamp is circumferentially arranged around the CCD camera.

[0007] Optionally, a plurality of air holes are provided on the rubber plate, and the air holes are used to provide adsorption force.

[0008] Optionally, a negative pressure mechanism is further included for providing negative pressure to the plurality of air holes.

[0009] Optionally, the negative pressure mechanism comprises a first air pump and a plurality of first air pipes, an air inlet of the first air pump is communicated with one end of the plurality of first air pipes, and the other end of the first air pipe is communicated with the corresponding air hole.

[0010] Optionally, the light shielding mechanism comprises an air cylinder, a piston, a push rod, a light shielding elastic cloth and an air inlet pipe, the air cylinder is arranged in the side wall of the detection dark box, the piston is slidably connected with the inner wall of the air cylinder, the top end of the push rod is connected with the push rod, the bottom end of the push rod extends into the box opening, one end of the light shielding elastic cloth is connected to the inner side wall of the detection dark box, the other end of the light shielding elastic cloth extends downward from the bottom end of the push rod, then extends upward and is connected to the outer side wall of the detection dark box, the top inner cavity of the air cylinder is communicated with one end of the air inlet pipe, and the other end of the air inlet pipe is communicated with the air outlet of the first air pump.

[0011] Optionally, the two sides of the open box body are provided with extension parts, and the upper surfaces of the extension parts are used for sliding contact with the bottom of the light shielding elastic cloth.

[0012] Optionally, the light shielding mechanism further comprises a rubber ball, the upper part of the rubber ball is connected with the bottom end of the push rod, the lower part of the rubber ball is used for abutting against the light shielding elastic cloth, and the diameter of the rubber ball is smaller than the width of the box opening.

[0013] Optionally, an air suction and exhaust mechanism is further included, the air suction and exhaust mechanism is used for sucking air from the deformable cavity or the air suction and exhaust mechanism is used for exhausting air into the deformable cavity.

[0014] Optionally, the air suction and exhaust mechanism comprises a second air pump and a second air pipe, an air port of the second air pump is communicated with one end of the second air pipe, and the other end of the second air pipe is communicated with the deformable cavity.

[0015] The printing product online detection device has the following beneficial effects: the positioning box is driven by the belt conveyor to move from left to right and from right to left, so that the continuity of the detection of the electronic label in the positioning box is realized, when the positioning box is in the detection position, the corresponding box opening is shielded by the light shielding mechanism, so that the external light entering from the box opening does not affect the visual detection of the visual detection mechanism, the rubber plate is raised or recessed, so that the actual application scene of the electronic label with the nano coating technology is simulated, when the electronic label with the nano coating technology is bent upward, the coating is subjected to tensile stress, and when the electronic label with the nano coating technology is bent downward, the coating is subjected to compressive stress, the visual detection mechanism can capture the problems such as the stress-induced coating micro-crack propagation path and interface delamination tendency, and the failure mechanism analysis of the nano coating under the bending working condition is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of an online printed matter detection device according to an embodiment of the present invention; Figure 2 This is a structural diagram of a positioning box in an on-line inspection device for printed matter according to an embodiment of the present invention when the positioning box is in the inspection position; Figure 3 This is a schematic structural diagram of a rubber plate bulging in an online printed product inspection device according to an embodiment of the present invention; Figure 4 This is a structural diagram of a printed matter online inspection device according to an embodiment of the present invention when the positioning box is outside the box opening; Figure 5 for Figure 4 A magnified view of the structure at point A; Figure 6 for Figure 2 A magnified view of the structure at point B in FIG.

[0017] Explanation of the accompanying symbols: 1. Detection dark box; 11. Box opening; 2. Visual inspection mechanism; 21. CCD camera; 22. Ring fill light; 3. Belt conveyor; 4. Positioning box; 41. Box body; 42. Rubber plate; 43. Extension part; 421. Air hole; 5. Negative pressure mechanism; 51. First air pump; 52. First air pipe; 6. Suction and exhaust mechanism; 61. Second air pump; 62. Second air pipe; 7. Light-shielding mechanism; 71. Air cylinder; 72. Piston; 73. Push rod; 74. Light-blocking elastic fabric; 75. Air inlet pipe; 76. Pinball; 100. Printed electronic label. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0020] Throughout this specification, reference to terms such as "an embodiment," "one embodiment," "some embodiments," "exemplarily," and "one embodiment" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or embodiment are included in at least one embodiment or embodiment of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or embodiment. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or embodiments.

[0021] The terms "first," "second," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or to implicitly specify the quantity of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one of the features.

[0022] An embodiment of the present invention provides an online inspection device for printed products, comprising: an inspection darkbox 1, with box openings 11 on both sides; a visual inspection mechanism 2, connected to the inner top of the inspection darkbox 1; a belt conveyor 3, arranged in the inspection darkbox 1, and with both ends passing through the corresponding box openings 11 respectively; a positioning box 4, connected to the upper belt surface of the belt conveyor 3 to transport the positioning box 4 to the inspection position, and the inspection position faces the visual inspection mechanism 2, wherein the positioning box 4 includes a box body 41 and a rubber plate 42, the top of the box body 41 is set to be open, and the rubber plate 42 is connected to the open to form a deformable cavity with the box body 41, when the air pressure in the deformable cavity increases, the rubber plate 42 bulges, and when the air pressure in the deformable cavity decreases, the rubber plate 42 is concave; two sets of light-shielding mechanisms 7, respectively arranged on the two box openings 11, when the positioning box 4 is in the inspection position, the light-shielding mechanism 7 blocks the corresponding box opening 11.

[0023] Specifically, the visual detection mechanism 2 can be a visual detection camera, which uploads and analyzes the acquired images through the visual detection camera. This technology is existing technology and will not be described in detail here. It should be noted that this detection device is used to specifically detect printed electronic tags 100 using nano-coating technology. This type of printed electronic tag 100 uses a new material called nano-coating, which improves conductivity and printing accuracy by adding nano-silver particles (20-50 nm) or carbon nanotubes to the ink. In this optional embodiment, a nano-scale insulating coating (such as SiO2 nano-particle dispersion) is covered on the surface of the printed circuit to prevent oxidation or mechanical wear.

[0024] In this optional embodiment, combined with Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the positioning box 4 is moved left to right and right to left by the belt conveyor 3, so as to realize continuous detection of the printed electronic label in the positioning box 4, and when the positioning box 4 is in the detection position, the light shielding mechanism 7 shields the corresponding box opening 11, so that external light enters the box opening 11 to affect the visual detection of the visual detection mechanism 2. By making the rubber plate 42 protrude or recess, the actual application scene of the brush electronic label 100 using nano coating technology is simulated. When the brush electronic label 100 using nano coating technology is bent upward, the coating is subjected to tensile stress, and when it is bent downward, it is subjected to compressive stress. The visual detection mechanism 2 can capture the stress-induced coating micro-crack propagation path and interface delamination tendency, and realize the failure mechanism analysis of nano coating under bending conditions.

[0025] It needs to be explained that the meaning of the coating micro-crack propagation path is that when bent upward, the coating is subjected to tensile stress, and when bent downward, it is subjected to compressive stress. The CCD camera 21 can capture the stress-induced micro-crack initiation and extension (resolution ≥ 1 μm); The meaning of the interface delamination tendency is that when the adhesion between the nano coating and the substrate is insufficient, bending will cause interface delamination, and under a certain illumination angle, interference fringes (such as Newton's rings) are generated. The annular light supplement lamp 22 is combined with the polarizing filter to enhance the contrast.

[0026] Optionally, the visual detection mechanism 2 includes a CCD camera 21 and an annular light supplement lamp 22, the CCD camera 21 and the annular light supplement lamp 22 are connected to the inner top surface of the detection dark box 1, and the annular light supplement lamp 22 is arranged around the CCD camera 21. The visual detection mechanism 2 can also include a polarizing filter to enhance contrast.

[0027] Further, a plurality of air holes 421 are arranged on the rubber plate 42, and the air holes 421 are used to provide suction force. The online printing detection device further includes a negative pressure mechanism 5 for providing negative pressure to the plurality of air holes 421. The negative pressure mechanism 5 includes a first air pump 51 and a plurality of first air pipes 52. The air inlet of the first air pump 51 is in communication with one end of the plurality of first air pipes 52, and the other end of the first air pipe 52 is in communication with the corresponding air hole 421.

[0028] In this optional embodiment, in combination with Figure 2 , Figure 3 and Figure 4 As shown, the first air pump 51 simultaneously sucks air through the plurality of first air pipes 52, so as to generate negative pressure in the plurality of first air pipes 52, thereby generating suction force in the air holes 421, so as to tightly suck the lower surface of the printed electronic label 100 to the upper surface of the rubber plate 42. The first air pump 51 simultaneously blows air through the plurality of first air pipes 52, so as to release the suction force generated by the air holes 421, so as to facilitate the removal of the printed electronic label 100 from the upper surface of the rubber plate 42.

[0029] Optionally, the light-shielding mechanism 7 includes an air cylinder 71, a piston 72, a push rod 73, a light-blocking elastic cloth 74 and an air inlet pipe 75. The air cylinder 71 is arranged in the side wall of the detection darkbox 1, the piston 72 is slidably connected to the inner wall of the air cylinder 71, the top of the push rod 73 is connected to the push rod 73, and the bottom end of the push rod 73 extends to the box opening 11. One end of the light-blocking elastic cloth 74 is connected to the inner wall of the detection darkbox 1, and the other end of the light-blocking elastic cloth 74 extends downward from the bottom end of the push rod 73, then extends upward and is connected to the outer wall of the detection darkbox 1. The top inner cavity of the air cylinder 71 is connected to one end of the air inlet pipe 75, and the other end of the air inlet pipe 75 is connected to the air outlet of the first air pump 51.

[0030] In this optional embodiment, combined with Figure 2 、 Figure 5 and Figure 6 As shown, the color of the light-blocking elastic fabric 74 can be black, and the material of the light-blocking elastic fabric 74 can be spandex, Lycra, etc. The bottom end of the air cylinder 71 is an open structure. When the positioning box 4 moves to the detection position with the upper belt surface of the belt conveyor 3, the positioning box 4 is located in the center of the detection darkroom 1, so that the printed electronic label 100 is directly below the visual detection mechanism 2. At this time, the first air pump 51 simultaneously sucks air into the multiple first air pipes 52, so that the air holes 421 generate adsorption force, and the lower surface of the printed electronic label 100 is sucked tightly to the upper surface of the rubber plate 42, and the first air pump 51 sends the sucked gas into the air cylinder 71 through the first air pipe 52. The gas pushes the air cylinder 71 downward, thereby driving the push rod 73 to push the bottom of the light-blocking elastic fabric 74 downward. At this time, both sides of the light-blocking elastic fabric 74 are stretched downward, so that the bottom of the light-blocking elastic fabric 74 abuts against the upper belt surface of the belt conveyor 3, thereby making the outer side of the box opening 11 and the inner side close to each other. The two sides of the light-blocking elastic cloth 74 are blocked by the light-blocking elastic cloth 74. In this way, the box opening 11 achieves a double-layer light-blocking effect to avoid light leakage inside the detection darkbox 1. At the same time, since the bottom width of the push rod 73 is much smaller than the width of the box opening 11, when the bottom of the light-blocking elastic cloth 74 abuts the upper belt surface of the belt conveyor 3, the two sides of the lower part of the light-blocking elastic cloth 74 will approach each other, so that the two sides of the upper part of the light-blocking elastic cloth 74 will press the inner and outer walls of the detection darkbox 1 at the top of the box opening 11 more tightly, further preventing stray light from entering and affecting visual inspection. After the visual inspection mechanism 2 detects, it is necessary to release the adsorption force generated by the air hole 421, and the first air pump 51 is started. The air inlet pipe 75 sends the gas in the air cylinder 71 back to the first air pipe 52. At this time, the light-blocking elastic cloth 74 acts as a spring and returns to its original state from the stretched state. The bottom of the light-blocking elastic cloth 74 lifts the bottom of the push rod 73 upward until the box opening 11 is exposed again for the next round of inspection.

[0031] Optionally, both sides of the opening of the box body 41 are provided with extension portions 43 , and the upper surfaces of the extension portions 43 are used for sliding contact with the bottom of the light-blocking stretch fabric 74 .

[0032] In this optional embodiment, as shown in Figure 4 When the positioning box 4 is located outside the detection dark box 1, the bottom of the light-blocking elastic cloth 74 is still in the upper part of the box opening 11, that is, the light-blocking elastic cloth 74 has not blocked the box opening 11. After the printed electronic label 100 is placed on the rubber plate 42, the positioning box 4 is driven by the belt conveyor 3 to move from right to left. The extension part 43 at the top left side of the box body 41 will slide with the bottom of the light-blocking elastic cloth 74, so that the bottom of the light-blocking elastic cloth 74 generates static electricity. Then, the box body 41 continues to move to the left, and the bottom of the light-blocking elastic cloth 74 with the box body 41 can adsorb dust on the upper surface of the printed electronic label, avoiding the influence of dust on subsequent visual detection. Before the next round of detection, the dust at the bottom of the light-blocking elastic cloth 74 can be cleaned in time.

[0033] Further, the light shielding mechanism 7 further comprises a rubber ball 76, the upper part of the rubber ball 76 is connected with the bottom end of the push rod 73, and the lower part of the rubber ball 76 is used for abutting against the light-blocking elastic cloth 74. The diameter of the rubber ball 76 is smaller than the width of the box opening 11.

[0034] In this optional embodiment, as shown in Figure 5 and Figure 6 The rubber ball 76 can be a rubber ball. When the rubber ball 76 presses the bottom of the light-blocking elastic cloth 74 to the upper belt surface of the belt conveyor 3, the rubber ball 76 can generate a certain compression deformation under the pressure of the push rod 73, increase the contact area between the bottom of the light-blocking elastic cloth 74 and the upper belt surface of the belt conveyor 3, and make the contact between the bottom of the light-blocking elastic cloth 74 and the upper belt surface of the belt conveyor 3 more closely. In this way, the rubber ball 76 can avoid the existence of a small gap between the bottom of the light-blocking elastic cloth 74 and the upper belt surface of the belt conveyor 3, which cannot be observed by naked eyes, and avoid the light entering the detection dark box 1 from the small gap, thereby affecting the detection process.

[0035] Optionally, the printed matter online detection device further comprises an air suction and exhaust mechanism 6. The air suction and exhaust mechanism 6 is used for sucking air from the deformable cavity, or the air suction and exhaust mechanism 6 is used for exhausting air into the deformable cavity. The air suction and exhaust mechanism 6 comprises a second air pump 61 and a second air pipe 62. The air port of the second air pump 61 is in communication with one end of the second air pipe 62, and the other end of the second air pipe 62 is in communication with the deformable cavity.

[0036] In this optional embodiment, as shown in Figure 3 and Figure 4As shown, the second air pump 61 can be installed on the frame of the belt conveyor 3 by bolts, and the second air pipe 62 is set as a hose and has a certain length so as not to interfere with the reciprocating movement of the positioning box 4. The second air pump 61 exhausts air into the deformable cavity or draws air from the deformable cavity through the second air pipe 62, thereby increasing or decreasing the air pressure inside the deformable cavity, thereby causing the rubber plate 42 to bulge or sink.

[0037] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A printed matter online detection device, characterized in that: include: A dark box (1) is provided with box openings (11) on both sides; A visual detection mechanism (2) is connected to the inner top of the detection dark box (1); A belt conveyor (3) is arranged in the detection dark box (1), and its two ends respectively pass through the corresponding box openings (11); A positioning box (4) is connected to the upper belt surface of the belt conveyor (3) to transport the positioning box (4) to a detection position, wherein the detection position faces the visual detection mechanism (2), wherein the positioning box (4) includes a box body (41) and a rubber plate (42), the top of the box body (41) is set to be open, and the rubber plate (42) is connected to the open to form a deformable cavity with the box body (41), when the air pressure of the deformable cavity increases, the rubber plate (42) bulges, and when the air pressure of the deformable cavity decreases, the rubber plate (42) is concave; Two sets of light-shielding mechanisms (7) are respectively arranged on the two box openings (11); when the positioning box (4) is in the detection position, the light-shielding mechanisms (7) shield the corresponding box openings (11).

2. The printed matter online detection device according to claim 1, characterized in that: The visual detection mechanism (2) includes a CCD camera (21) and an annular fill light (22), the CCD camera (21) and the annular fill light (22) are both connected to the inner top surface of the detection dark box (1), and the annular fill light (22) is arranged around the CCD camera (21).

3. The printed matter online detection device according to claim 1, characterized in that: The rubber plate (42) is provided with a plurality of air holes (421), and the air holes (421) are used to provide adsorption force.

4. The printed matter online detection device according to claim 3, characterized in that: It also includes a negative pressure mechanism (5), and the negative pressure mechanism (5) is used to provide negative pressure for the plurality of air holes (421).

5. The printed matter online detection device according to claim 4, characterized in that: The negative pressure mechanism (5) comprises a first air pump (51) and a plurality of first air pipes (52), wherein an air inlet of the first air pump (51) is connected to one end of the plurality of first air pipes (52), and the other end of the first air pipe (52) is connected to the corresponding air hole (421).

6. The printed matter online detection device according to claim 5, characterized in that: The light-shielding mechanism (7) includes an air cylinder (71), a piston (72), a push rod (73), a light-shielding elastic cloth (74) and an air inlet pipe (75). The air cylinder (71) is arranged in the side wall of the detection dark box (1). The piston (72) is slidably connected to the inner wall of the air cylinder (71). The top end of the push rod (73) is connected to the push rod (73). The bottom end of the push rod (73) extends to the box opening (11). One end of the light-shielding elastic cloth (74) is connected to the inner wall of the detection dark box (1). The other end of the light-shielding elastic cloth (74) extends downward from the bottom end of the push rod (73) and then extends upward and is connected to the outer wall of the detection dark box (1). The top inner cavity of the air cylinder (71) is connected to one end of the air inlet pipe (75), and the other end of the air inlet pipe (75) is connected to the air outlet of the first air pump (51).

7. The printed matter online detection device according to claim 6, characterized in that: Both sides of the opening of the box body (41) are provided with extension parts (43), and the upper surfaces of the extension parts (43) are used for sliding contact with the bottom of the light-blocking elastic fabric (74).

8. The printed matter online detection device according to claim 6, characterized in that: The light-shielding mechanism (7) further comprises a pinball (76), the upper portion of the pinball (76) being connected to the bottom end of the push rod (73), the lower portion of the pinball (76) being used to abut against the light-shielding elastic fabric (74), and the diameter of the pinball (76) being smaller than the width of the box opening (11).

9. The printed matter online detection device according to claim 1, characterized in that: It also includes an air intake and exhaust mechanism (6), which is used to inhale air from the deformable cavity, or the air intake and exhaust mechanism (6) is used to exhaust air into the deformable cavity.

10. The printed matter online detection device according to claim 9, characterized in that: The air intake and exhaust mechanism (6) comprises a second air pump (61) and a second air pipe (62), wherein the air port of the second air pump (61) is connected to one end of the second air pipe (62), and the other end of the second air pipe (62) is connected to the deformable cavity.

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