Light transmission detector

Abstract

The utility model belongs to the technical field of product packaging, and discloses a light transmission detector, the light transmission detector comprises a shading chamber, a fixed seat, a light source and an image acquisition assembly, the shading chamber comprises a shading box body and a shading door, the shading box body is provided with an opening, and the shading door is arranged at the opening in an opening and closing manner; the plurality of fixing seats are fixed in the shading chamber, each fixing seat comprises an elastic profiling protruding part, and the profiling protruding parts are used for fixing a to-be-detected packing material; the light source is fixed on the fixed seat, and when a to-be-detected packing material is fixed on the profiling convex part, the light source is positioned in the packing material; the image acquisition assembly is located in the shading chamber and used for acquiring image information of the to-be-detected packing material. The light transmission detector can realize batch detection of packing materials, and is high in detection precision.

Description

Technical Field

[0001] The utility model relates to the technical field of product packaging, in particular to a light transmittance detector. Background Art

[0002] Packaging is an important link in the food production process. Excellent packaging materials are not only beneficial to food transportation and storage, but also conducive to food quality preservation and freshness preservation. In the production process of UHT milk, in order to maintain the flavor and nutritional components of milk, there are extremely high requirements for its packaging materials. Among them, the light-blocking property of the packaging material is an important item. Milk is prone to photodegradation reaction under strong light irradiation. The photodegradation reaction will not only produce peculiar smell, but also damage the nutritional components of milk. Therefore, the detection of the light-blocking property of milk packaging materials is particularly important in milk packaging production.

[0003] At present, the general steps for detecting the light-blocking property of milk packaging materials are as follows: Place the milk packaging material with an opening in a light-shielded area, irradiate from the outside of the milk packaging material to the inside with a flashlight, and observe whether there are light-transmitting points inside the milk packaging material through the opening. This detection method not only has low detection efficiency, is difficult to achieve batch detection, but also the detection accuracy is difficult to guarantee. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a light transmittance detector to solve the problems of low detection efficiency and low detection accuracy of the existing light-blocking property detection of product packaging materials.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A light transmittance detector includes a light-shielding chamber, a fixing seat, a light source and an image acquisition component. The light-shielding chamber includes a light-shielding box body and a light-shielding door. An opening is provided on the light-shielding box body, and the light-shielding door is movably arranged at the opening; A plurality of the fixing seats are fixed in the light-shielding chamber. The fixing seat includes an elastic profiling convex part, and the profiling convex part is used for fixing the packaging material to be detected; The light source is fixed on the profiling convex part. When the packaging material to be detected is fixed on the profiling convex part, the light source is located inside the packaging material; The image acquisition component is located in the light-shielding chamber, and the image acquisition component is used for acquiring the image information of the packaging material to be detected.

[0007] In one embodiment, the light transmittance detector further includes an opening and closing driving component, and the opening and closing driving component is connected to the light-shielding door, and the opening and closing driving component is configured to drive the light-shielding door to open and close.

[0008] In one embodiment, the opening is formed at the top of the light-shielding box body. The opening and closing drive assembly includes a lifting motor, a screw rod, and a screw rod sleeve. The screw rod is vertically arranged. The screw rod sleeve is threadedly sleeved on the top end of the screw rod and is connected to the light-shielding door. The screw rod sleeve can perform a vertical lifting movement when the screw rod rotates. The lifting motor is configured to drive the screw rod to rotate.

[0009] In one embodiment, the light source includes a light bar and a heat insulation cover. The heat insulation cover covers the outside of the light bar. The light emitted by the light bar can penetrate through the heat insulation cover.

[0010] In one embodiment, the fixed seat is detachably and fixedly connected to the light-shielding chamber.

[0011] In one embodiment, the fixed seat further includes a bottom bracket. The profiling convex part is fixed on the bottom bracket. The light-shielding chamber is provided with a power source for supplying power to the light source. The power source includes two first electrode terminals with opposite polarities. The light source includes two second electrode terminals with opposite polarities. When the bottom bracket is fixed to the light-shielding chamber, the first electrode terminals and the second electrode terminals are correspondingly connected.

[0012] In one embodiment, one of the first electrode terminal and the second electrode terminal is electrically connected to a magnet, and the other of the first electrode terminal and the second electrode terminal is electrically connected to a magnet or a magnetic member.

[0013] In one embodiment, the image acquisition component includes a camera. A plurality of the cameras are divided into two groups, and the two groups of cameras are respectively located on opposite sides of the fixed seat.

[0014] In one embodiment, a plurality of the fixed seats are arranged at intervals along the circumferential direction in the light-shielding chamber. The light transmission detector further includes a rotating part and a rotation drive assembly. The rotating part is rotatably arranged at the top of the light-shielding chamber. The image acquisition component is arranged on the rotating part and corresponds to the fixed seat one by one. The rotation drive assembly is configured to drive the rotating part to rotate.

[0015] In one embodiment, the profiling convex part is formed by 3D printing.

[0016] The beneficial effects of the present utility model:

[0017] In the embodiment of the present utility model, the light transmission detector fixes the package to be detected through a profiling convex part arranged in the light-shielding chamber and adapted to the shape of the package opening, and places the light source on the profiling convex part, enabling the light source to be completely inside the package, with high detection accuracy. Moreover, the light transmission detector uses an image acquisition component to acquire the image information of the package to be detected. Since there are multiple image acquisition components and fixing seats correspondingly arranged, the operator can judge the light-blocking properties of multiple packages by observing whether there are light spots in the multiple image information acquired by the image acquisition components, thereby realizing batch detection and improving the detection efficiency. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the light transmission detector in the embodiment of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the light source installed on the fixing seat in the embodiment of the present utility model.

[0020] In the figure:

[0021] 1, light-shielding chamber; 2, light source; 21, lamp strip; 22, heat insulation cover; 3, fixing seat; 31, profiling convex part; 32, bottom support; 4, image acquisition component; 5, opening and closing drive component; 51, screw rod; 52, screw rod sleeve; 6, rotating part; 7, rotation drive component; 8, package. Detailed Embodiment

[0022] The following further elaborates on the present utility model in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0023] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0025] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0026] Reference Figure 1 - Figure 2 As shown, in the embodiment of the present utility model, a light transmission detector is proposed, which includes a light-shielding chamber 1, a light source 2, a fixing base 3 and an image acquisition component 4. The light-shielding chamber 1 is used to form a light-shielded environment. The light-shielding chamber 1 includes a light-shielding box body and a light-shielding door. An opening is provided on the light-shielding box body, and the light-shielding door is movably arranged at the opening of the light-shielding box body. The light source 2, the fixing base 3 and the image acquisition component 4 are all arranged in the light-shielding chamber 1 and a plurality of them are correspondingly arranged. Among them, the fixing base 3 includes a bottom support 32 and an elastic profiling convex part 31. The fixing base 3 is fixed to the bottom of the light-shielding chamber 1 through the bottom support 32. The profiling convex part 31 is fixed on the bottom support 32, and the radial profile of the profiling convex part 31 is adapted to the radial profile of the opening of the packaging material 8 to be detected. The light source 2 is fixed on the profiling convex part 31. The packaging material 8 to be detected can be sleeved on the profiling convex part 31 and cover the light source 2 therein, and the image acquisition component 4 is used to acquire the image information of the packaging material 8 to be detected.

[0027] The above light transmission detector is provided with a profiling convex part 31 adapted to the opening shape of the packaging material 8 in the light-shielding chamber 1 to fix the packaging material 8 to be detected and place the light source 2 on the profiling convex part 31, so that the light source 2 can be completely placed inside the packaging material 8, with high detection accuracy. Moreover, the light transmission detector uses the image acquisition component 4 to acquire the image information of the packaging material 8 to be detected. Since a plurality of image acquisition components 4 and fixing bases 3 are correspondingly arranged, the operator can judge the light-blocking properties of a plurality of packaging materials 8 by observing whether there are light spots in the plurality of image information acquired by the image acquisition component 4, thereby realizing batch detection and improving the detection efficiency.

[0028] Reference Figure 1 As shown, in order to realize the automatic opening and closing of the light-shielding door and improve the degree of automation, the light-shielding chamber 1 further includes an opening and closing drive assembly 5, and the opening and closing drive assembly 5 is connected to the light-shielding door to realize the opening and closing of the light-shielding door relative to the light-shielding box body.

[0029] In one embodiment, the opening of the light-shielding box body is opened at the top of the light-shielding box body. The opening and closing drive assembly 5 realizes the opening or closing of the light-shielding door relative to the light-shielding box body by driving the light-shielding door to lift and lower. The image acquisition assembly 4 is installed on the light-shielding door, and the fixed seat 3 is installed at the bottom of the light-shielding box body. The opening and closing drive assembly 5 includes a lifting motor, a screw rod 51 and a screw rod sleeve 52. Among them, the screw rod 51 is arranged vertically, and the screw rod sleeve 52 is threadedly sleeved on the top end of the screw rod 51 and connected to the light-shielding door. The screw rod sleeve 52 can make a vertical lifting movement when the screw rod 51 rotates to drive the light-shielding door to lift and lower. The lifting motor is built in the bottom of the light-shielding box body and connected to the screw rod 51 to drive the screw rod 51 to rotate.

[0030] In other embodiments, the opening and closing drive assembly 5 can also adopt an electric cylinder, an oil cylinder, etc., which will not be elaborated here.

[0031] Specifically, at least the outer surface of the light-shielding chamber 1 is made of a black acrylic board to ensure that all linear light sources 2 can be filtered out after the packaging material 8 is placed in the light-shielding chamber 1. And a protruding insertion part is arranged on the side of the light-shielding door facing the light-shielding box body, and the insertion part can be inserted into the light-shielding box body and abutted against the inner peripheral wall of the light-shielding box body. More specifically, the insertion part is made of an elastic material or a sealing gasket is sleeved outside the insertion part to reduce the possibility of light leakage caused by the imperfect fit between the light-shielding box body and the light-shielding door.

[0032] Reference Figure 2 As shown, the light source 2 includes a light bar 21 and a heat insulation cover 22. The heat insulation cover 22 covers the light bar 21, and the light emitted by the light bar 21 can pass through the heat insulation cover 22, that is, the heat insulation cover 22 is set as a transparent structure. For example, the heat insulation cover 22 is made of high-transparency and high-temperature-resistant silica gel. The setting of the heat insulation cover 22 can prevent the packaging material 8 from being deformed due to the too high temperature of the light bar 21 during long-term operation, and further prevent light leakage caused by the incompatibility between the opening shape of the packaging material 8 and the shape of the profiling convex part 31, and can meet the requirements of continuous monitoring. Specifically, the light bar 21 adopts an LED lamp, the LED lamp has a small volume and high illuminance, and the heat insulation cover 22 is formed on the surface of the light bar 21 by the compression of high-transparency and high-temperature-resistant silica gel.

[0033] In order to be able to adapt to different types of packaging materials 8, the fixing base 3 is detachably connected to the light-shielding chamber 1, and different types of packaging materials 8 are adapted by replacing the fixing base 3 with a profiling convex portion 31 having different shapes. For example, milk packaging materials 8 are generally rectangular or polygonal prism-shaped. When performing light-blocking property detection on them, the packaging material 8 is cut open horizontally at a preset position in the middle (retaining the splicing surface of the packaging material 8, and light leakage is more likely to occur at the splicing surface). At this time, the opening of the milk packaging material 8 is rectangular or polygonal, and the radial contour of the profiling convex portion 31 is rectangular or polygonal. In one embodiment, at least the profiling convex portion 31 of the fixing base 3 is made by 3D printing technology so that the radial contour of the profiling convex portion 31 completely matches the opening of the packaging material 8.

[0034] In one embodiment, a magnet is provided on one of the bottom tray 32 and the light-shielding chamber 1, and a magnet or magnetic member is provided on the other, and the bottom tray 32 and the light-shielding chamber 1 are magnetically connected. In other embodiments, the bottom tray 32 and the light-shielding chamber 1 can also be connected by a snap connection.

[0035] A power supply for supplying power to the light source 2 is also provided inside the light-shielding chamber 1. In order to reduce the connection difficulty between the light source 2 and the power supply when the fixing base 3 is fixed inside the light-shielding chamber 1, taking the magnetic connection between the bottom tray 32 and the light-shielding chamber 1 as an example, the power supply is arranged inside the bottom of the light-shielding chamber 1. The power supply includes two first electrode terminals with opposite polarities, namely a first positive terminal and a first negative terminal. The light source 2 includes two second electrode terminals with opposite polarities, namely a second positive terminal and a second negative terminal. When the fixing base 3 and the light-shielding chamber 1 are magnetically connected, the first positive terminal and the second positive terminal are connected, and the first negative terminal and the second negative terminal are connected. At this time, the power supply can supply power to the light source 2.

[0036] Specifically, the magnet or magnetic member provided on the fixing base 3 is electrically connected to the second positive terminal and the second negative terminal, and the magnet or magnetic member provided on the light-shielding chamber 1 is electrically connected to the first positive terminal and the first negative terminal to reduce the connection difficulty between the first positive terminal and the second positive terminal, and between the first negative terminal and the second negative terminal.

[0037] It should be noted that when the fixing base 3 and the light-shielding chamber 1 are connected by a snap connection, a male metal buckle electrically connected to the second positive terminal and the second negative terminal of the light source 2 is provided on the bottom tray 32, and female metal buckles are connected to both the first positive terminal and the first negative terminal of the power supply. After the male metal buckle and the female metal buckle are buckled together, the power supply can supply power to the light source 2.

[0038] Reference Figure 1As shown, the image acquisition component 4 includes a mounting bracket and cameras. A plurality of cameras are fixed to the light-shielding door through the mounting bracket. The plurality of cameras are divided into two groups, and the two groups of cameras are respectively located on opposite sides of the fixed seat 3. Each group of cameras includes a plurality of cameras arranged at intervals in the vertical direction. For example, each group of cameras includes two cameras arranged at intervals in the vertical direction.

[0039] In order to further improve the detection accuracy and perform omnidirectional image acquisition of the packaging material 8 placed on the fixed seat 3, the image acquisition component 4 can rotate relative to the fixed seat 3. In order to reduce the manufacturing cost, a plurality of fixed seats 3 are arranged at intervals in the circumferential direction in the light-shielding chamber 1, and the two groups of cameras are respectively located on opposite sides of the fixed seat 3 facing the center and away from the center of the light-shielding chamber 1. On this basis, the light transmission detector further includes a rotating part 6 and a rotation driving component 7. The rotating part 6 is rotatably arranged on the light-shielding door. The mounting brackets of the plurality of image acquisition components 4 are arranged on the rotating part 6 in one-to-one correspondence with the fixed seats 3 and can rotate together with the rotating part 6. The rotation driving component 7 is connected to the rotating part 6 and is used to drive the rotating part 6 to rotate. That is, the rotation of the rotating part 6 can drive a plurality of image acquisition components 4 to rotate relative to the fixed seat 3 at the same time. It can be understood that when the light-shielding door is arranged on the top of the light-shielding box body and the opening and closing driving component 5 includes a lifting motor, a screw rod 51 and a screw sleeve 52, the screw sleeve 52 is coaxially arranged with the rotating part 6, and the screw sleeve 52 passes through the rotating part 6 and is connected to the light-shielding door to avoid the screw sleeve 52 interfering with the rotation of the rotating part 6.

[0040] The rotation driving component 7 includes a rotation motor. The rotation motor can be directly connected to the rotating part 6 or be in transmission connection with the rotating part 6, which will not be elaborated here.

[0041] In other embodiments, the rotating part 6 can also be arranged at the bottom of the light-shielding chamber 1, and a plurality of fixed seats 3 are arranged at intervals in the circumferential direction on the rotating part 6. That is, the image acquisition component 4 is stationary relative to the light-shielding chamber 1, while the light source 2 rotates relative to the fixed seat 3.

[0042] In order to achieve real-time observation, the cameras are connected to a fixed terminal by cable or wirelessly connected to a mobile terminal through wifi. The cameras can feedback the collected image information to the display screen of the fixed terminal or the mobile terminal in real time for the inspectors to observe in real time. At the same time, the fixed terminal or the mobile terminal also has a storage function for convenient later traceability.

[0043] When detecting the light-blocking property of the packaging material 8, the packaging material 8 to be detected is cut horizontally from the middle to form an opening, and then cleaned with water. Then, the light-shielding door is opened, the fixing seat 3 adapted to the opening shape of the packaging material 8 to be detected is fixed to the bottom of the light-shielding chamber 1, and the packaging material 8 to be detected is sleeved on the profiling convex portion 31. The light-shielding door is closed, the light source 2 is turned on, and the image information obtained by the image acquisition component 4 is observed to check whether there is a light-transmitting point. If there is no light-transmitting point, it indicates that the light-blocking property of the packaging material 8 to be detected is good; otherwise, it indicates that the light-blocking property of the packaging material 8 to be detected does not meet the requirements.

[0044] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A light transmission detector, characterized in that: The light transmission detector comprises: A light-shielding room (1), the light-shielding room (1) comprising a light-shielding box body and a light-shielding door, the light-shielding box body being provided with an opening, the light-shielding door being openably and closably arranged at the opening; A fixing seat (3), a plurality of the fixing seats (3) are fixed in the light shielding chamber (1), the fixing seat (3) comprising an elastic protruding portion (31), the protruding portion (31) being used to fix the packaging material (8) to be detected; A light source (2) is fixed on the contoured protrusion (31); when the packaging material (8) to be inspected is fixed on the contoured protrusion (31), the light source (2) is located inside the packaging material (8); An image acquisition component (4) is located in the light-shielding chamber (1), and the image acquisition component (4) is used to acquire image information of the packaging material (8) to be inspected.

2. The light transmission detector according to claim 1, characterized in that: The light transmission detector further comprises an opening and closing driving component (5), wherein the opening and closing driving component (5) is connected to the light shielding door, and the opening and closing driving component (5) is configured to drive the light shielding door to open and close.

3. The light transmission detector according to claim 2, characterized in that: The opening is formed at the top of the light-shielding box body, and the opening and closing driving assembly (5) comprises a lifting motor, a screw rod (51) and a screw rod sleeve (52). The screw rod (51) is vertically arranged, and the screw rod sleeve (52) is threadedly sleeved on the top of the screw rod (51) and connected to the light-shielding door. The screw rod sleeve (52) can perform vertical lifting movement when the screw rod (51) rotates, and the lifting motor is configured to drive the screw rod (51) to rotate.

4. The light transmission detector according to claim 1, characterized in that: The light source (2) comprises a light bar (21) and a heat insulation cover (22); the heat insulation cover (22) is arranged outside the light bar (21); and light emitted by the light bar (21) can pass through the heat insulation cover (22).

5. The light transmission detector according to claim 1, characterized in that: The fixing seat (3) is detachably fixedly connected to the light shielding chamber (1).

6. The light transmission detector according to claim 5, characterized in that: The fixing seat (3) further comprises a base (32), the contoured protrusion (31) is fixed to the base (32), the light shielding chamber (1) is provided with a power supply for supplying power to the light source (2), the power supply comprises two first electrode terminals with opposite polarities, the light source (2) comprises two second electrode terminals with opposite polarities, and when the base (32) is fixed to the light shielding chamber (1), the first electrode terminal and the second electrode terminal are connected correspondingly.

7. The light transmission detector according to claim 6, characterized in that: One of the first electrode terminal and the second electrode terminal is electrically connected to a magnet, and the other of the first electrode terminal and the second electrode terminal is electrically connected to a magnet or a magnetic member.

8. The light transmission detector according to any one of claims 1 to 7, characterized in that: The image acquisition component (4) comprises a camera, wherein the plurality of cameras are divided into two groups, and the two groups of cameras are respectively located on two opposite sides of the fixing seat (3).

9. The light transmission detector according to claim 8, characterized in that: A plurality of the fixing seats (3) are fixed in the light-shielding chamber (1) along a circumferential direction. The light transmission detector further comprises a rotating portion (6) and a rotation drive assembly (7). The rotating portion (6) is rotatably arranged at the top of the light-shielding chamber (1). The image acquisition assembly (4) is arranged on the rotating portion (6) and corresponds one-to-one with the fixing seats (3). The rotation drive assembly (7) is configured to drive the rotating portion (6) to rotate.

10. The light transmission detector according to any one of claims 1 to 7, characterized in that: The contoured protrusion (31) is formed by 3D printing.

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