Small box appearance front detection system

Abstract

The utility model discloses a small box appearance front detection system, which belongs to the technical field of cigarette packet appearance quality control, and comprises an arc-shaped protective plate, a photoelectric sensor, a visual camera, a visual detection controller and an industrial personal computer, a hole is formed in the arc-shaped protection plate, the visual camera monitors the front face of a small cigarette packet through the hole in the arc-shaped protection plate, the visual camera transmits detected front face image information to the visual detection controller, and the front face image information is transmitted to the industrial personal computer through the visual detection controller. And the monitored front images of the small cigarette packets are judged and analyzed through the industrial personal computer. According to the utility model, appearance detection can be carried out on the front side of the small cigarette packet through an automatic detection means, original manual sampling detection is replaced, and automation and precision of front side detection of the small cigarette packet are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette package appearance quality control, in particular to a small box appearance front detection system. Background Art

[0002] In the industrial production of small-box cigarette packages, it is necessary to inspect the appearance quality of small-box cigarette packages. The quality inspection of the appearance of small-box cigarette packages is an important link to ensure that tobacco products meet standards and quality requirements. In the current production environment, the appearance inspection of small-box cigarette packages mainly adopts two means: manual inspection and machine vision inspection. Among them, the appearance quality of cigarette packages, such as trademarks, patterns, sizes, seals, etc., is inspected by manual visual inspection. This method has obvious disadvantages, such as strong subjectivity, slow inspection speed, easy fatigue, resulting in increased false detection rate, and cannot meet the inspection needs of large-scale production. In addition, with the advancement of modern intelligent technology, the current appearance quality inspection of small-box cigarette packages adopts online visual inspection technology, but due to the compact structure of some packaging machine equipment, it is impossible to inspect the front of hard-box small-box cigarette packages, resulting in certain quality risks in some small-box cigarette packages produced, causing losses to consumers. In the case of using online visual inspection technology to inspect the appearance quality of small-box cigarette packages, it is also necessary to inspect the front of small-box cigarette packages manually according to irregular sampling. This manual sampling method often has the problems of strong subjectivity, slow inspection speed and high false detection rate. Utility Model Content

[0003] In view of the above, the utility model aims to provide a small box front appearance detection system to solve the aforementioned problems of manual visual inspection of the appearance quality of cigarette packages, which is highly subjective, slow in detection speed, and prone to fatigue leading to increased false detection rate, as well as the inability to inspect the front of hard-box small box cigarette packages, resulting in certain quality risks in some small box cigarette packages produced.

[0004] The technical solution adopted by the utility model is as follows:

[0005] The utility model provides a small box appearance front detection system, including an arc-shaped guard plate, a photoelectric sensor, a visual camera, a visual detection controller and an industrial computer; the arc-shaped guard plate is arranged between a conveyor belt and a star-shaped sub-packaging wheel, and the small box cigarette packs are conveyed to the star-shaped sub-packaging wheel by the conveyor belt; the photoelectric sensor and the visual camera are installed on the lower side of the arc-shaped guard plate, and the photoelectric sensor is arranged on one side of the visual camera, and a hole is opened on the arc-shaped guard plate, and the visual camera monitors the front of the small box cigarette pack through the hole on the arc-shaped guard plate; the photoelectric sensor and the visual camera are connected to the visual detection controller through a signal line, and the visual detection controller is connected to the industrial computer for communication.

[0006] Preferably, the conveyor belt comprises a first conveyor belt and a second conveyor belt, the first conveyor belt and the second conveyor belt are arranged opposite to each other up and down, and the small box cigarette packs are placed between the first conveyor belt and the second conveyor belt.

[0007] Preferably, the hole formed on the arc-shaped guard plate is square, and the size of the hole is larger than the size of the front side of the small cigarette pack.

[0008] Preferably, one end of the visual camera is aligned with the center point of the hole on the arc-shaped guard plate.

[0009] Preferably, a camera mounting bracket is provided at one end of the visual camera, and the visual camera is fixed on the base of the packaging machine through the camera mounting bracket.

[0010] Preferably, the camera mounting bracket is configured as a metal sheet, and the metal sheet has a right-angle bend structure, which divides the metal sheet into two perpendicular surfaces. One of the surfaces of the metal sheet is provided with a plurality of bolt holes for fixing the visual camera by bolts, and the other surface of the metal sheet is also provided with a plurality of bolt holes for fixing the visual camera by bolts on the base of the packaging machine.

[0011] Preferably, the distance between one end of the visual camera and the center point of the hole on the arc-shaped guard plate is 10 mm.

[0012] In summary, the small box appearance front detection system of the utility model has the following beneficial effects:

[0013] The arc-shaped guard plate is provided with a hole, which is square and larger than the size of the front of the small box cigarette package. The distance between one end of the visual camera and the center point of the hole on the arc-shaped guard plate is 10 mm. The visual camera monitors the front of the small box cigarette package through the hole on the arc-shaped guard plate, and transmits the detected front image information to the visual detection controller, and then transmits it to the industrial computer through the visual detection controller. The utility model can perform appearance detection on the front of the small box cigarette package by automated detection means, replace the original manual sampling, realize the automation and precision of the front detection of the small box cigarette package, improve the detection effect and efficiency of the small box cigarette package, and further improve the appearance quality of the small box cigarette package. The image acquisition frequency of the visual camera is controlled by the visual detection controller, so that the image acquisition frequency is adapted to the rotation speed of the star-shaped packaging wheel to collect the front image of each small box cigarette package. The utility model detects the appearance of the small box cigarette package online, timely discovers cigarette package defects, avoids the generation of a large number of defective cigarette packages, and saves production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings, in which:

[0015] Figure 1 A schematic diagram of the structure of a small box appearance front detection system provided by an embodiment of the utility model;

[0016] Figure 2 A schematic diagram of the partial structure of the small box appearance front detection system provided by the embodiment of the utility model Figure 1 ;

[0017] Figure 3 A schematic diagram of the structure of the curved guard plate in the small box appearance front detection system provided by the embodiment of the utility model;

[0018] Figure 4 A schematic diagram of the partial structure of the small box appearance front detection system provided by the embodiment of the utility model Figure 2 ;

[0019] Figure 5 A flow chart of a method for detecting the front appearance of a small box provided in an embodiment of the utility model.

[0020] Explanation of the accompanying drawings: 1. Star-shaped packaging wheel; 2. First conveyor belt; 3. Small-box cigarette packs; 4. Second conveyor belt; 5. Arc-shaped guard plate; 6. Photoelectric sensor; 7. Visual camera; 8. Camera mounting bracket. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0022] In the current production environment, the appearance inspection of small box cigarette packages mainly adopts two means: manual inspection and machine vision inspection. Among them, the appearance quality of cigarette packages, such as trademarks, patterns, sizes, seals, etc., is inspected by manual visual inspection. This method has obvious disadvantages, such as strong subjectivity, slow detection speed, easy fatigue, resulting in increased false detection rate, and cannot meet the inspection needs of large-scale production. In addition, with the advancement of modern intelligent technology, the current appearance quality inspection of small box cigarette packages adopts online visual inspection technology, but due to the compact structure of some packaging machine equipment, it is impossible to inspect the front of hard box small box cigarette packages, resulting in certain quality risks in some small box cigarette packages produced, causing losses to consumers. The utility model opens a square hole on the arc-shaped guard plate, and the size of the square hole is larger than the size of the front of the small box cigarette package. The visual camera monitors the front of the small box cigarette package through the hole on the arc-shaped guard plate, and transmits the detected front image information to the visual inspection controller, and then transmits it to the industrial control computer through the visual inspection controller. The industrial control computer judges and analyzes the monitored front image of the small box cigarette package. Through the above structure, the utility model can perform appearance inspection on the front of small-box cigarette packages by automated detection means, replacing the original manual random inspection, realizing the automation and precision of the front inspection of small-box cigarette packages, improving the detection effect and efficiency of small-box cigarette packages, and being able to detect cigarette package defects in a timely manner, avoiding the production of a large number of defective cigarette packages, and saving production costs.

[0023] The first embodiment of the utility model provides a small box appearance front detection system, specifically, as follows Figures 1 to 4 As shown, it includes an arc-shaped guard plate 5, a photoelectric sensor 6, a visual camera 7, a visual detection controller and an industrial computer; the arc-shaped guard plate 5 is arranged between the conveyor belt and the star-shaped sub-packaging wheel 1, and the small box cigarette package 3 is conveyed to the star-shaped sub-packaging wheel 1 through the conveyor belt; the photoelectric sensor 6 and the visual camera 7 are installed on the lower side of the arc-shaped guard plate 5, and the photoelectric sensor 6 is arranged on one side of the visual camera 7, and a hole is opened on the arc-shaped guard plate 5, and the visual camera 7 monitors the front of the small box cigarette package 3 through the hole on the arc-shaped guard plate 5; the photoelectric sensor 6 and the visual camera 7 are connected to the visual detection controller through a signal line, and the visual detection controller is connected to the industrial computer for communication. After the photoelectric sensor 6 detects the small box cigarette package 3, the cigarette package data signal is transmitted to the visual detection controller, and the visual detection controller outputs a control signal to the visual camera 7, which triggers the visual camera 7 to detect the front of the small box cigarette package 3 passing by, and transmits the detected front image information to the visual detection controller, and then transmits it to the industrial computer through the visual detection controller, and the industrial computer judges and analyzes the monitored front image of the small box cigarette package 3.

[0024] Specifically, the conveyor belt includes a first conveyor belt 2 and a second conveyor belt 4, the first conveyor belt 2 and the second conveyor belt 4 are arranged opposite to each other up and down, and a small box of cigarette packs 3 is placed between the first conveyor belt 2 and the second conveyor belt 4. Figure 1 As shown in FIG, the first conveyor belt 2 is the upper conveyor belt of the cigarette packs, the second conveyor belt 4 is the lower conveyor belt of the cigarette packs, and the small box cigarette packs 3 are transmitted between the upper conveyor belt of the cigarette packs and the lower conveyor belt of the cigarette packs.

[0025] Furthermore, the hole on the curved guard plate 5 is square, and the size of the hole is larger than the size of the front of the small box cigarette package 3. One end of the visual camera 7 is aligned with the center point of the hole on the curved guard plate 5, so that the visual camera 7 can monitor the front of the small box cigarette package 3 in a full range through the hole on the curved guard plate 5 to obtain a complete front image of the small box cigarette package 3.

[0026] In one embodiment of the utility model, a camera mounting bracket 8 is provided at one end of the visual camera 7, and the visual camera 7 is fixed to the base of the packaging machine through the camera mounting bracket 8. Specifically, the camera mounting bracket 8 is configured as a metal sheet, and the metal sheet has a right-angle bending structure, and the right-angle bending structure divides the metal sheet into two perpendicular surfaces, one of the surfaces of the metal sheet is provided with a plurality of bolt holes for fixing the visual camera 7 by bolts, and the other surface of the metal sheet is also provided with a plurality of bolt holes for fixing the visual camera 7 by bolts to the base of the packaging machine. Specifically, four bolt holes are respectively provided on the two perpendicular surfaces of the metal sheet, and the visual camera 7 is installed by the right-angle bending structure and the bolt fixing structure, which can improve the stability of the visual camera 7, thereby further improving the stability of the visual camera 7 in taking pictures, and improving the stability of the acquired image quality.

[0027] Furthermore, the distance between one end of the visual camera 7 and the center point of the hole on the arc-shaped guard plate 5 is 10 mm. By setting a reasonable distance, it can ensure that the visual camera 7 can obtain a complete front image of the small box cigarette package 3 while improving the clarity of the obtained image.

[0028] The second embodiment of the utility model also provides a method for detecting the front appearance of a small box. Figure 5 As shown, the method comprises the following steps:

[0029] The visual camera 7 is installed on the base of the packaging machine through the camera mounting bracket 8, and the visual camera 7 is aligned with the hole opened on the arc-shaped guard plate 5, wherein the photoelectric sensor 6 is arranged on one side of the visual camera 7. After the photoelectric sensor 6 detects the small box cigarette pack 3, the cigarette pack data signal is transmitted to the visual detection controller, and the visual detection controller outputs a control signal to the visual camera 7, triggering and controlling the visual camera 7 to perform front detection on the passing small box cigarette pack 3, and the visual camera 7 transmits the detected front image information to the visual detection controller, and then transmits it to the industrial computer through the visual detection controller;

[0030] The image acquisition frequency of the visual camera 7 is controlled by the visual detection controller so that the image acquisition frequency is adapted to the rotation speed of the star-shaped packaging wheel 1, so as to acquire the front image of each small cigarette pack 3;

[0031] Based on the collected front image of the small box cigarette package 3, the front detection information in the front image of the small box cigarette package 3 is judged by the industrial computer. If the front image is unqualified, a rejection signal is transmitted to the downstream machine, and the downstream machine rejects the unqualified cigarette package to complete the front detection of the small box cigarette package 3; wherein, the industrial computer analyzes the front image of the small box cigarette package 3 based on the internal C# image processing software, and performs image grayscale conversion on the front image information of the small box cigarette package 3;

[0032] Specifically, the grayscale threshold of the front image of the small box cigarette package 3 is stored in the industrial computer. The industrial computer performs grayscale conversion on the collected front image of the small box cigarette package 3 to obtain the grayscale detection value of the front image, and compares the grayscale threshold of the front image of the small box cigarette package 3 with the grayscale detection value of the front image. If the grayscale detection value of the front image is lower than or higher than the set grayscale threshold of the front image, it is determined that the cigarette package image is unqualified; at this time, the industrial computer outputs a judgment signal of unqualified to the visual detection controller, and the visual detection controller transmits a rejection signal to the downstream machine, and the downstream machine rejects the unqualified cigarette package to complete the front detection of the small box cigarette package 3. If there is no cigarette package in the star-shaped packaging wheel 1 and the photoelectric sensor does not detect the cigarette package information, the visual camera 7 is not triggered to take pictures.

[0033] Specifically, the image acquisition frequency of the visual camera 7 is set to 60 frames per second, and 40M pixels are used, and the rotation speed of the star-shaped packaging wheel 1 is set to 50 rpm. In addition, the image acquisition frequency of the visual camera 7 can also be set to other values, and the rotation speed of the star-shaped packaging wheel 1 can also be set to other values, but the image acquisition frequency of the visual camera 7 is adapted to the rotation speed of the star-shaped packaging wheel, so that the front image of each small box cigarette package 3 can be collected without problems such as image leakage detection and unclear image.

[0034] Specifically, during the working process, when the small box cigarette pack 3 passes through the upper conveyor belt 2 of the cigarette pack and the lower conveyor belt 4 to the star-shaped packaging wheel 1, the star-shaped packaging wheel 1 rotates clockwise to transfer the small box cigarette pack 3 to the visual monitoring square hole of the arc-shaped guard plate 5. After the photoelectric sensor 6 detects the cigarette pack, it transmits the cigarette pack data signal to the visual detection controller. The visual detection controller outputs a control signal to the visual camera 7, which triggers the visual camera 7 to perform image appearance detection on the small box cigarette pack 3 passing by, and transmits the acquired front image information to the visual detection controller. The controller then transmits it to the industrial computer. The image processing library software inside the industrial computer converts the image grayscale of the front image information of the small box cigarette package 3, and then compares it with the set front image grayscale threshold. If the detected front image grayscale detection value is lower than or higher than the set front image grayscale threshold, it is judged that the front image of the cigarette package is unqualified. At this time, the industrial computer outputs an unqualified judgment signal to the visual inspection controller, and the visual inspection controller transmits a rejection signal to the downstream machine. The downstream machine rejects the unqualified cigarette package and completes the front detection of the small box cigarette package 3.

[0035] The utility model performs appearance inspection on the front of small-box cigarette packages by automated inspection means, replacing the original manual sampling inspection, realizing automation and precision of the front inspection of small-box cigarette packages, and can improve the inspection effect and efficiency of small-box cigarette packages, and further improve the appearance quality of small-box cigarette packages. The image acquisition frequency of the visual camera is controlled by the visual inspection controller, so that the image acquisition frequency is adapted to the rotation speed of the star-shaped packaging wheel, so as to collect the front image of each small-box cigarette package. The utility model detects the appearance of small-box cigarette packages online, timely discovers cigarette package defects, avoids the generation of a large number of defective cigarette packages, and saves production costs.

[0036] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings, but the above is only a preferred embodiment of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched into a variety of equivalent schemes by those skilled in the art without departing from or changing the design concept and technical effects of the present invention; therefore, the present invention is not limited to the scope of implementation as shown in the drawings, and all changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the specification and drawings, should be within the protection scope of the present invention.

Claims

1. A small box appearance front detection system, characterized in that: The invention comprises an arc-shaped guard plate (5), a photoelectric sensor (6), a visual camera (7), a visual detection controller and an industrial computer; the arc-shaped guard plate (5) is arranged between a conveyor belt and a star-shaped packaging wheel (1), and the small cigarette packs (3) are conveyed to the star-shaped packaging wheel (1) by the conveyor belt; the photoelectric sensor (6) and the visual camera (7) are installed on the lower side of the arc-shaped guard plate (5), and the photoelectric sensor (6) is arranged on one side of the visual camera (7); a hole is opened on the arc-shaped guard plate (5), and the visual camera (7) monitors the front of the small cigarette packs (3) through the hole on the arc-shaped guard plate (5); the photoelectric sensor (6) and the visual camera (7) are connected to the visual detection controller through a signal line, and the visual detection controller is connected to the industrial computer for communication.

2. The small box appearance front detection system according to claim 1 is characterized in that: The conveyor belt comprises a first conveyor belt (2) and a second conveyor belt (4); the first conveyor belt (2) and the second conveyor belt (4) are arranged opposite to each other vertically; the small cigarette pack (3) is placed between the first conveyor belt (2) and the second conveyor belt (4).

3. The small box appearance front detection system according to claim 1 is characterized in that: The hole formed on the arc-shaped guard plate (5) is square, and the size of the hole is larger than the size of the front side of the small cigarette pack (3).

4. The small box appearance front detection system according to claim 1 is characterized in that: One end of the visual camera (7) is aligned with the center point of the hole on the arc-shaped guard plate (5).

5. The small box appearance front detection system according to claim 1 is characterized in that: A camera mounting bracket (8) is provided at one end of the visual camera (7), and the visual camera (7) is fixed on the base of the packaging machine through the camera mounting bracket (8).

6. The small box front appearance detection system according to claim 5, characterized in that: The camera mounting bracket (8) is configured as a metal sheet, and the metal sheet has a right-angle bending structure, the right-angle bending structure divides the metal sheet into two perpendicular surfaces, one of the surfaces of the metal sheet is provided with a plurality of bolt holes for fixing the visual camera (7) by bolts, and the other surface of the metal sheet is also provided with a plurality of bolt holes for fixing the visual camera (7) on the base of the packaging machine by bolts.

7. The small box appearance front detection system according to claim 1, characterized in that: The distance between one end of the visual camera (7) and the center point of the hole on the arc-shaped guard plate (5) is 10 mm.

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