Double-light-source mechanical imaging equipment for detecting surface defects of cigarette carton

Abstract

The utility model discloses double-light-source cigarette carton surface defect detection mechanical imaging equipment which comprises a conveyor and an image acquisition assembly installed on the conveyor, the image acquisition assembly comprises five cameras and light source modules used in cooperation with the cameras, and the five cameras are the first camera, the second camera, the third camera, the fourth camera and the fifth camera respectively. The first camera is installed on the front side of the conveyor, the second camera is installed above the second conveyor, the third camera is installed on the rear side of the conveyor, the fourth camera is installed on the left side of the conveyor, the fifth camera is installed on the right side of the conveyor, and the five sets of light source modules are arranged and used in cooperation with the five cameras respectively. According to the designed lighting imaging mode, fewer cameras can be used, richer and finer defect characteristics can be obtained, the problem that an original imaging mode needs to be considered is solved, two different light sources are used for obtaining pictures under two different light fields respectively, and different defects of transparent materials and paper materials are shown respectively.

Description

A mechanical imaging device for detecting surface defects in cigarette packs using dual light sources Technical Field

[0001] This utility model relates to the field of cigarette bar detection technology, specifically a mechanical imaging device for detecting surface defects in cigarette bars using dual light sources. Background Technology

[0002] Cigarettes are a type of tobacco product. The manufacturing process involves drying tobacco, shredding it, and rolling the shredded tobacco into strips using cigarette paper. After production, cigarettes are typically packaged into cigarette cartons for protection and subsequent transport and sale. These cartons are usually wrapped in a transparent material, which may have defects such as wrinkles, poor shaping, or misalignment. The paper wrapping material inside the transparent material may also have defects such as folds, tears, dirt, or poor shaping, requiring inspection and treatment.

[0003] However, existing methods for inspecting cigarette packs have the following problems: conventional surface defect detection methods use seven or more cameras to inspect five sides of the cigarette pack. Furthermore, because the light source is singular during photography, a compromise must be made between highlighting defects in transparent materials and defects in paper materials. This results in images that must capture different types of defects, leading to low detection accuracy and a high false positive rate. Therefore, corresponding technical solutions need to be designed to address these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-light source mechanical imaging device for detecting surface defects in cigarette packs. This device solves the problem that conventional surface defect detection methods use seven or more cameras to detect five sides of the cigarette pack. Furthermore, because the light source is singular during photography, a compromise must be made between highlighting the defect features of transparent materials and the defect features of paper materials. As a result, the captured images must take into account different types of defect features, leading to low detection accuracy and a high false detection rate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dual-light source cigarette strip surface defect detection mechanical imaging device, comprising a conveyor and an image acquisition component mounted on the conveyor. The image acquisition component includes five cameras and light source modules used in conjunction with the cameras. The five cameras are designated as Camera 1, Camera 2, Camera 3, Camera 4, and Camera 5. Camera 1 is mounted on the front side of the conveyor, Camera 2 is mounted above the conveyor, Camera 3 is mounted on the rear side of the conveyor, Camera 4 is mounted on the left side of the conveyor, and Camera 5 is mounted on the right side of the conveyor. The light source modules are divided into five groups and used in conjunction with the five cameras respectively. Each light source module includes Light Source 1 and Light Source 2, which are arranged parallel to each other at the shooting end of the camera. The conveyor is also equipped with Trigger Sensor 1 and Trigger Sensor 2, both of which are connected to a control console via wiring. The control console is connected to the five cameras via wiring.

[0006] In a preferred embodiment of this utility model, the first light source and the second light source are located between the camera and the object being measured.

[0007] In a preferred embodiment of this invention, the irradiation ends of the first and second light sources are directly facing the surface of the cigarette pack, and both are connected to the control console via wiring.

[0008] In a preferred embodiment of this invention, both trigger sensor one and trigger sensor two are infrared trigger sensors.

[0009] In a preferred embodiment of this invention, the distance between the first trigger sensor and the second trigger sensor is greater than half the length of the cigarette bar.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This invention improves upon existing cigarette bar detection methods by designing a light-imaging detection device. This light-imaging method can use fewer cameras to obtain richer and more detailed defect features, avoiding the problem of having to consider multiple aspects in the original imaging method. It uses two different light sources to acquire images under two different light fields, respectively showing the different defects of transparent materials and paper materials. Moreover, this solution uses only five cameras but can obtain better image quality and detection effect than seven cameras. Attached Figure Description

[0012] Figure 1 is a diagram showing the division of the tobacco strip area according to this utility model;

[0013] Figure 2 is a schematic diagram of the cigarette bar detection state of the present invention;

[0014] Figure 3 is a schematic diagram of the second detection state of the cigarette bar according to this utility model;

[0015] Figure 4 is a schematic diagram of the corresponding setup of the camera and light source according to this utility model.

[0016] In the diagram: 1. Conveyor; 2. Camera 1; 3. Camera 2; 4. Camera 3; 5. Camera 4; 6. Camera 5; 7. Light source 1; 8. Light source 2; 9. Trigger sensor 1; 10. Trigger sensor 2; 11. Control console. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please refer to Figures 1-4. This utility model provides a technical solution: a dual-light source cigarette strip surface defect detection mechanical imaging device, including a conveyor 1 and an image acquisition component installed on the conveyor 1. The image acquisition component includes five cameras and light source modules used in conjunction with the cameras. The five cameras are camera 1 (2), camera 2 (3), camera 3 (4), camera 4 (5), and camera 5 (6). Camera 1 (2) is installed on the front side of the conveyor 1, camera 2 (3) is installed above the conveyor 1, camera 3 (4) is installed on the rear side of the conveyor 1, camera 4 (5) is installed on the left side of the conveyor 1, and camera 5 (6) is installed on the right side of the conveyor 1. The light source modules are divided into five groups and are used in conjunction with the five cameras respectively. The light source modules include light source lamp 1 (7) and light source lamp 2 (8). Light source lamp 1 (7) and light source lamp 2 (8) are arranged parallel to the shooting end of the camera. The conveyor 1 is also equipped with trigger sensor 1 (9) and trigger sensor 2 (10). Both trigger sensor 1 (9) and trigger sensor 2 (10) are connected to a control console 11 through lines. The control console 11 is connected to the five cameras through lines.

[0019] As shown in Figure 1, the cigarette pack is divided into eight blocks during the detection process. Five cameras are distributed in the detection area. Camera 1 is used to capture images of area A1 and A2 in Figure 1 in sequence. Camera 2 is used to capture images of area B1 and B2 in Figure 1 in sequence. Camera 3 is used to capture images of area C1 and C2 in Figure 1 in sequence. Camera 4 is used to capture images of area D1 in Figure 1. Camera 5 is used to capture images of area D2 in Figure 1.

[0020] As further improved, as shown in Figure 4, light source 7 and light source 8 are located between the camera and the object being measured.

[0021] As further improved, as shown in Figure 2, the irradiation ends of light source 7 and light source 8 are directly facing the surface of the smoke bar and are connected to the control console 11 via wiring.

[0022] As a further improvement, as shown in Figure 2, both trigger sensor 9 and trigger sensor 10 are infrared trigger sensors.

[0023] Specifically, the distance between trigger sensor 9 and trigger sensor 10 is greater than half the length of the cigarette bar.

[0024] In use: As shown in Figure 1-3, the smoke bar moves from right to left on the graph. When trigger sensor 19 detects that the end of the smoke bar has moved to that position, cameras 12 to 45 simultaneously capture images, using two different light sources to quickly capture images twice. When the smoke bar continues to move to the left, trigger sensor 210 senses it, and cameras 12 to 34 and 56 simultaneously capture images, using two different light sources to quickly capture images twice. Before the camera enters the image capturing state, light source 17 lights up in one color first, and the camera captures an image once. Immediately afterwards, light source 17 turns off, and light source 28 lights up in another color, and the camera captures an image a second time. Finally, light source 28 turns off. The purpose of capturing images in the above manner is to use different colored light sources to highlight different types of defect features in the same area of ​​the object being measured. Since the interval between the two images is extremely short, the displacement of the object being measured is extremely small during image capture. It can be approximately considered that two different light sources are used to capture images in the same area to highlight different types of defect features in that area.

[0025] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mechanical imaging device for detecting surface defects in cigarette packs using dual light sources, characterized in that: The system includes a conveyor (1) and an image acquisition component mounted on the conveyor (1). The image acquisition component includes five cameras and a light source module used in conjunction with the cameras. The five cameras are Camera 1 (2), Camera 2 (3), Camera 3 (4), Camera 4 (5), and Camera 5 (6). Camera 1 (2) is mounted on the front side of the conveyor (1), Camera 2 (3) is mounted above the conveyor (1), Camera 3 (4) is mounted on the rear side of the conveyor (1), and Camera 4 (5) is mounted on the left side of the conveyor (1). The five (6) light source modules are installed on the right side of the conveyor (1). The light source modules are divided into five groups and are used in conjunction with five cameras. The light source modules include light source one (7) and light source two (8). The light source one (7) and light source two (8) are arranged in parallel at the shooting end of the camera. The conveyor (1) is also equipped with trigger sensor one (9) and trigger sensor two (10). The trigger sensor one (9) and trigger sensor two (10) are both connected to the control console (11) through a line. The control console (11) is connected to the five cameras through a line.

2. The mechanical imaging device for detecting surface defects in cigarette packs using a dual-light source according to claim 1, characterized in that: The light source lamp one (7) and light source lamp two (8) are located between the camera and the object being measured.

3. The mechanical imaging device for detecting surface defects in cigarette packs using a dual-light source according to claim 2, characterized in that: The illumination ends of the light source lamp one (7) and the light source lamp two (8) face the surface of the cigarette bar and are connected to the control console (11) by a line.

4. A dual light source mechanical imaging apparatus for detecting surface defects on a tobacco rod as recited in claim 1, wherein: Both the trigger sensor one (9) and the trigger sensor two (10) are infrared trigger sensors.

5. The mechanical imaging device for detecting surface defects in cigarette packs using a dual-light source according to claim 4, characterized in that: The distance between the trigger sensor 1 (9) and the trigger sensor 2 (10) is greater than half the length of the cigarette bar.

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