Two-dimensional code recognition device of tobacco sorting line

Abstract

The utility model discloses a two-dimensional code recognition device of a tobacco sorting line, which comprises a plurality of cameras arranged on two sides of a conveyor belt mechanism of the sorting line. The camera is a high-definition industrial camera with a flash lamp; the plurality of cameras are connected with the conveyor belt mechanism through two adjustable bracket mechanisms arranged on the two sides of the conveyor belt mechanism, so that the lenses of all the cameras point to the middle axis position of the conveyor belt mechanism; a light shield is arranged above the plurality of cameras and the two adjustable bracket mechanisms, and the cameras and the two adjustable bracket mechanisms are inversely buckled in an inner cavity of the light shield; the light shield is in a box shape, and two faces perpendicular to the conveying direction of the conveying belt mechanism are provided with notches for conveying articles to pass through. The light shield is detachably connected to the adjustable support mechanism. The beneficial effects are that through the design of the high-definition industrial camera and the light shield, the interference of an external light source is reduced, and the accuracy of two-dimensional code recognition is improved.

Description

Technical Field

[0001] The utility model relates to the field of tobacco, in particular to a two-dimensional code recognition device for a tobacco sorting line. Background Art

[0002] The "QR code" project implemented by tobacco companies is an advanced product tracing and supervision system. The project integrates traceability information such as cigarette product information, brand information, tobacco industry information and customer information by embedding a unique QR code on each tobacco product. This information includes key logistics information such as product production, manufacturer, batch, flow direction and date, so as to achieve full tracking and recording of cigarette products from production to final sales.

[0003] When in use, tobacco manufacturers generate a unique QR code for each tobacco product and embed product-related information into it. In the tobacco packaging factory, the QR code is connected to the tobacco packaging. From the tobacco industrial production outbound to the cigarette commercial warehousing, the flow of tobacco is recorded by scanning the QR code. Cigarette commercial logistics associates customer order information in the sorting to home operation based on customer order information. Tobacco companies, retailers, and consumers can understand the source and flow of products by scanning QR codes, thereby strengthening the supervision of tobacco products, protecting their own rights and interests, preventing counterfeit and inferior products, and improving the transparency of tobacco management.

[0004] However, there are some challenges and problems in the actual operation of the "QR code" project. In the process of tobacco industry production out of the warehouse to the commercial storage of cigarettes, the flow direction is recorded only by scanning the QR code of the cigarette pieces (50 pieces / piece). In the process of sorting cigarettes, in order to achieve the precise association between "pieces and pieces", it is necessary to split the pieces, scan the codes, seal the packages, and use at least 6 professional high-definition industrial cameras for 270-degree real-time photo verification. In addition, in order to deal with false alarms caused by insufficient light, a "high-explosive" flash is also required for fill light.

[0005] The main technical problems currently exist include:

[0006] 1. The operators of the upper machine of the sorting line need to monitor the operation of the equipment in real time and intervene manually on unrelated cigarettes. In this operating environment, there are about 120,000 "high-explosive" flash lights flashing every day, which may pose a threat to the health of the operators.

[0007] 2. Open barcode scanning equipment is easily interfered by external light, which may cause false alarms and reduce sorting efficiency.

[0008] 3. There are potential risks in the cleanliness and safety of the equipment, which require further improvement and optimization. Summary of the invention

[0009] In order to solve the above technical problems, the purpose of the utility model is to provide a two-dimensional code recognition device for a tobacco sorting line.

[0010] The utility model is realized by the following technical solutions:

[0011] The utility model discloses a two-dimensional code recognition device for a tobacco sorting line, comprising a camera, wherein a plurality of cameras are arranged at both sides of a conveyor belt mechanism of the sorting line; the cameras are high-definition industrial cameras with flashlights; the plurality of cameras are connected to the conveyor belt mechanism through two adjustable bracket mechanisms arranged at both sides of the conveyor belt mechanism, so that the lenses of all cameras point to the central axis position of the conveyor belt mechanism;

[0012] A light shield is arranged above the above-mentioned cameras and two adjustable bracket mechanisms, and the two are inverted in the internal cavity of the light shield; the above-mentioned light shield is box-shaped, and notches for conveyed objects to pass through are arranged on the two sides perpendicular to the conveying direction of the conveyor belt mechanism; the above-mentioned light shield is detachably connected to the adjustable bracket mechanism.

[0013] Preferably, the light shield comprises side panels, a notch panel and a top cover; two of the side panels and two of the notch panels are provided to form a rectangular frame, which is clamped with the adjustable bracket mechanism via a limit card provided on the adjustable bracket mechanism; four limit cards are provided, which are respectively provided at the four corners of the two adjustable bracket mechanisms.

[0014] Preferably, the two adjustable bracket mechanisms are arranged in mirror symmetry; the adjustable bracket mechanism comprises a primary guide rail, a connecting rod, an angle bracket, a secondary guide rail and a camera fixing member;

[0015] The above-mentioned primary guide rail is provided with a linear through groove, which is arranged in parallel with the conveying direction of the conveyor belt mechanism, and the primary guide rail is vertically fixedly connected to the frame of the conveyor belt mechanism through a connecting rod; the linear through groove of the above-mentioned primary guide rail is detachably slidably connected to a plurality of angle brackets through fastening bolts, and the angle brackets can rotate freely and move along the linear through groove; the secondary guide rail is provided with a linear through groove, which is detachably slidably connected to the angle brackets through fastening bolts, and the secondary guide rail can rotate freely and move along the direction of the linear through groove; a linear through groove is provided on one side of the above-mentioned secondary guide rail that is not connected to the angle bracket, and the camera fixing piece is detachably rotatably connected to the secondary guide rail through fastening bolts, and the camera fixing piece can rotate freely and move along the linear through groove;

[0016] The camera fixing member is fixedly connected to the camera.

[0017] Preferably, a light absorbing coating is provided on the inner walls of the side panels, the notch panels and the top cover.

[0018] Preferably, the plurality of cameras are communicatively connected to a two-dimensional code host computer; an audible and visual alarm is provided on the light shield, and the audible and visual alarm is communicatively connected to a two-dimensional code host computer.

[0019] Preferably, a problem part sorting mechanism is provided behind the light shield, and the problem part sorting mechanism is connected to the frame of the conveyor belt mechanism; the problem part sorting mechanism is used to remove the conveyed objects that fail to scan the code from the conveyor belt mechanism.

[0020] Preferably, the above-mentioned problem parts sorting mechanism includes a gantry, a lifting beam, a moving head, an action arm, a sorting head and an infrared sensor component;

[0021] The gantry is connected to the conveyor belt mechanism, the two vertical rods of the gantry are respectively vertically fixedly connected to the conveyor belt mechanism, and the horizontal rod is arranged vertically to the conveying direction of the conveyor belt mechanism;

[0022] The gantry is equipped with a lifting beam, which is arranged vertically with the vertical rod of the gantry and can move linearly along the vertical rod of the gantry autonomously.

[0023] The lifting beam is equipped with a moving head, which can move linearly along the lifting beam autonomously;

[0024] The moving head is fixedly connected with an action arm; the action arm is a bent rod, one end of which is vertically fixedly connected to the action arm, and the other end is arranged vertically to the conveying surface of the conveyor belt mechanism;

[0025] A sorting head is fixedly connected to the action arm, and the sorting head is in the shape of a shovel and is used to remove the conveyed objects from the conveyor belt mechanism;

[0026] An infrared sensor component is arranged between the gantry and the light shield, and the infrared sensor component is communicatively connected with the problem part sorting mechanism.

[0027] Among them, the camera and conveyor belt mechanism are set up as follows:

[0028] The camera is the visual input of the entire system and is responsible for capturing the QR code of the items on the conveyor belt. The high resolution and high definition of the high-definition industrial camera ensure that the QR code information can be accurately captured. The camera is set on both sides of the conveyor belt and fixed by an adjustable bracket mechanism to ensure that the lens is always aligned with the center axis of the conveyor belt.

[0029] Design of the lens hood:

[0030] The light shield is used to block external light sources to ensure that the camera is not disturbed when shooting the QR code. Principle: The box-shaped design and internal cavity structure of the light shield can effectively shield external light and improve the accuracy of QR code recognition. The light shield consists of side panels, notch panels and top covers, which are connected to the adjustable bracket mechanism through limit cards to form a rectangular frame.

[0031] The structure of the adjustable bracket mechanism:

[0032] The adjustable bracket mechanism allows the camera position to be flexibly adjusted to meet the shooting requirements of different heights and angles. Through the design of the primary and secondary rails, the camera can be freely moved and fixed in the vertical and horizontal directions. The primary rail is fixed vertically to the conveyor frame, and the secondary rail is connected to the camera fixing to achieve precise positioning of the camera.

[0033] The linkage between the sound and light alarm and the problem parts sorting mechanism:

[0034] The sound and light alarm is used to sound an alarm when the code scanning fails or an error occurs, while the problem piece sorting mechanism is responsible for removing the failed pieces from the conveyor belt. When the QR code host computer detects that the code scanning fails or an error occurs, it sends a signal to the sound and light alarm and the problem piece sorting mechanism, triggering an alarm and executing the sorting action.

[0035] The sound and light alarm is installed on the light shield. The problem parts sorting mechanism includes components such as a gantry, a lifting beam, a moving head, an action arm and a sorting head, and is connected to the host computer through an infrared sensor component.

[0036] Classification and processing of problem items:

[0037] The problem piece sorting mechanism can identify and process two different types of problem pieces: successful scanning but incorrect information, and failed scanning. Through the logical judgment of the QR code host computer, these two types of problem pieces can be distinguished and the corresponding instructions can be sent to the problem piece sorting mechanism. The problem piece sorting mechanism is designed with two exits, corresponding to the two sides of the conveyor belt mechanism, which are used to classify different types of problem pieces to different locations.

[0038] The beneficial effects of the utility model are:

[0039] Improve recognition accuracy: The design of high-definition industrial cameras and light shields reduces interference from external light sources and improves the accuracy of QR code recognition.

[0040] Operational flexibility: The adjustable bracket mechanism allows the camera to be adjusted as needed to accommodate tobacco products of different sizes and shapes, increasing operational flexibility.

[0041] Automated sorting: The problem item sorting mechanism can automatically identify tobacco products that have failed to scan or have incorrect information and remove them from the conveyor belt, realizing automated sorting and reducing manual intervention.

[0042] Improved efficiency: The automated scanning and sorting process significantly improves the efficiency of the sorting line and reduces errors and time delays caused by manual operations.

[0043] Reduced losses: Accurate classification of problem items reduces losses caused by incorrect sorting, while also avoiding possible secondary damage to products.

[0044] Easy to maintain: The detachable design of the hood and bracket mechanism facilitates cleaning and maintenance, ensuring long-term and stable operation of the equipment.

[0045] Enhanced safety: The sound and light alarm will sound an alarm in time when a problem occurs, alerting the operator and enhancing the safety of the entire system.

[0046] Cost savings: By reducing the need for manual inspection and sorting, labor costs can be saved in the long run.

[0047] Strong environmental adaptability: The light-absorbing coating and flash lamp enable the device to work reliably even in environments with unfavorable lighting conditions.

[0048] Information feedback mechanism: The communication connection with the QR code host computer provides real-time information feedback, which is convenient for monitoring and adjusting the sorting strategy. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 : A schematic diagram of the three-dimensional structure of Example 1 of the utility model;

[0050] Figure 2 : A schematic diagram of the internal three-dimensional structure of Example 1 of the utility model;

[0051] Figure 3 : A schematic diagram of the three-dimensional structure of the secondary guide rail of the utility model;

[0052] Figure 4 : A three-dimensional structural diagram of the angle code of the utility model;

[0053] Figure 5 : A schematic diagram of the three-dimensional structure of Embodiment 2 of the present utility model;

[0054] Figure 6 : A three-dimensional structural cross-sectional view of Example 2 of the utility model;

[0055] In the figure: 1-light shield, 2-adjustable bracket mechanism, 3-camera, 4-sound and light alarm, 5-problem piece sorting mechanism, A-conveyor belt mechanism, 11-side plate, 12-notch plate, 13-top cover, 14-limit card, 21-primary guide rail, 22-connecting rod, 23-angle code, 24-secondary guide rail, 25-camera fixing part, 51-gantry, 52-lifting beam, 53-moving head, 54-action arm, 55-sorting head, 56-infrared sensor component. DETAILED DESCRIPTION

[0056] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0057] Example 1: Figure 1-4 As shown, a two-dimensional code recognition device for a tobacco sorting line includes a camera 3, wherein a plurality of cameras 3 are provided and arranged at both sides of a conveyor belt mechanism of the sorting line; the camera 3 is a high-definition industrial camera 3 with a flash; the plurality of cameras 3 are connected to the conveyor belt mechanism through two adjustable bracket mechanisms 2 arranged at both sides of the conveyor belt mechanism, so that the lenses of all cameras 3 point to the central axis position of the conveyor belt mechanism;

[0058] A light shield 1 is arranged above the above-mentioned cameras 3 and two adjustable bracket mechanisms 2, and the two are inverted in the internal cavity of the light shield 1; the above-mentioned light shield 1 is box-shaped, and notches for conveyed objects to pass through are arranged on the two sides perpendicular to the conveying direction of the conveyor belt mechanism; the above-mentioned light shield 1 is detachably connected to the adjustable bracket mechanism 2.

[0059] Preferably, the light shield 1 comprises a side panel 11, a notch panel 12 and a top cover 13; two of the side panels 11 and two of the notch panels 12 are provided to form a rectangular frame, which is connected to the adjustable bracket mechanism 2 via a limit card 14 provided on the adjustable bracket mechanism 2; four of the limit cards 14 are provided, which are respectively provided at the four corners of the two adjustable bracket mechanisms 2.

[0060] Preferably, the two adjustable bracket mechanisms 2 are arranged in mirror symmetry; the adjustable bracket mechanism comprises a primary guide rail 21, a connecting rod 22, an angle bracket 23, a secondary guide rail 24 and a camera fixing member 25;

[0061] The primary guide rail 21 is provided with a linear through groove, which is arranged in parallel with the conveying direction of the conveyor belt mechanism. The primary guide rail 21 is vertically fixedly connected to the frame of the conveyor belt mechanism through a connecting rod 22; the linear through groove of the primary guide rail 21 is detachably slidably connected to a plurality of angle brackets 23 through fastening bolts, and the angle brackets 23 can rotate freely and move along the linear through groove; the secondary guide rail 24 is provided with a linear through groove, which is detachably slidably connected to the angle brackets 23 through fastening bolts, and the secondary guide rail 24 can rotate freely and move along the direction of the linear through groove; a linear through groove is provided on one side of the secondary guide rail 24 that is not connected to the angle bracket 23, and the camera fixing part 25 is detachably rotatably connected to the secondary guide rail 24 through fastening bolts, and the camera fixing part 25 can rotate freely and move along the linear through groove;

[0062] The camera fixing member 25 is fixedly connected to the camera 3 .

[0063] Preferably, a light absorbing coating is provided on the inner walls of the side panels 11 , the notch panels 12 and the top cover 13 .

[0064] Preferably, the plurality of cameras 3 are communicatively connected to a two-dimensional code host computer; an audible and visual alarm 4 is disposed on the light shield 1, and the audible and visual alarm 4 is communicatively connected to a two-dimensional code host computer.

[0065] Among them, the camera 3 and the conveyor belt mechanism are set up as follows:

[0066] Camera 3 is the visual input end of the entire system and is responsible for capturing the QR code of the items on the conveyor belt. The high resolution and high definition of the high-definition industrial camera 3 ensure that the QR code information can be accurately captured. Camera 3 is set on both sides of the conveyor belt and fixed by an adjustable bracket mechanism 2 to ensure that the lens is always aligned with the central axis of the conveyor belt.

[0067] Design of lens hood 1:

[0068] The light shield 1 is used to block external light sources to ensure that the camera 3 is not disturbed when shooting the QR code. Principle: The box-shaped design and internal cavity structure of the light shield 1 can effectively shield external light and improve the accuracy of QR code recognition. The light shield 1 is composed of a side plate 11, a notch plate 12 and a top cover 13, and is connected to the adjustable bracket mechanism 2 through a limit card 14 to form a rectangular frame.

[0069] The structure of the adjustable bracket mechanism 2:

[0070] The adjustable bracket mechanism 2 allows the position of the camera 3 to be flexibly adjusted to meet the shooting requirements of different heights and angles. Through the design of the primary guide rail 21 and the secondary guide rail 24, the camera 3 can be freely moved and fixed in the vertical and horizontal directions. The primary guide rail 21 is vertically fixed to the conveyor frame, and the secondary guide rail 24 is connected to the camera fixing member 25 to achieve accurate positioning of the camera 3.

[0071] Sound and light alarm 4:

[0072] The sound and light alarm 4 is used to sound an alarm when scanning fails or an error occurs. When the QR code host computer detects that scanning fails or an error occurs, it sends a signal to the sound and light alarm 4 and the problem item sorting mechanism 5 to trigger an alarm.

[0073] Example 2: Figure 5 , 6 As shown, a two-dimensional code recognition device for a tobacco sorting line includes a camera 3, wherein a plurality of cameras 3 are provided and arranged at both sides of a conveyor belt mechanism of the sorting line; the camera 3 is a high-definition industrial camera 3 with a flash; the plurality of cameras 3 are connected to the conveyor belt mechanism through two adjustable bracket mechanisms 2 arranged at both sides of the conveyor belt mechanism, so that the lenses of all cameras 3 point to the central axis position of the conveyor belt mechanism;

[0074] A light shield 1 is arranged above the above-mentioned cameras 3 and two adjustable bracket mechanisms 2, and the two are inverted in the internal cavity of the light shield 1; the above-mentioned light shield 1 is box-shaped, and notches for conveyed objects to pass through are arranged on the two sides perpendicular to the conveying direction of the conveyor belt mechanism; the above-mentioned light shield 1 is detachably connected to the adjustable bracket mechanism 2.

[0075] Preferably, the light shield 1 comprises a side panel 11, a notch panel 12 and a top cover 13; two of the side panels 11 and two of the notch panels 12 are provided to form a rectangular frame, which is connected to the adjustable bracket mechanism 2 via a limit card 14 provided on the adjustable bracket mechanism 2; four of the limit cards 14 are provided, which are respectively provided at the four corners of the two adjustable bracket mechanisms 2.

[0076] Preferably, the two adjustable bracket mechanisms 2 are arranged in mirror symmetry; the adjustable bracket mechanism comprises a primary guide rail 21, a connecting rod 22, an angle bracket 23, a secondary guide rail 24 and a camera fixing member 25;

[0077] The primary guide rail 21 is provided with a linear through groove, which is arranged in parallel with the conveying direction of the conveyor belt mechanism. The primary guide rail 21 is vertically fixedly connected to the frame of the conveyor belt mechanism through a connecting rod 22; the linear through groove of the primary guide rail 21 is detachably slidably connected to a plurality of angle brackets 23 through fastening bolts, and the angle brackets 23 can rotate freely and move along the linear through groove; the secondary guide rail 24 is provided with a linear through groove, which is detachably slidably connected to the angle brackets 23 through fastening bolts, and the secondary guide rail 24 can rotate freely and move along the direction of the linear through groove; a linear through groove is provided on one side of the secondary guide rail 24 that is not connected to the angle bracket 23, and the camera fixing part 25 is detachably rotatably connected to the secondary guide rail 24 through fastening bolts, and the camera fixing part 25 can rotate freely and move along the linear through groove;

[0078] The camera fixing member 25 is fixedly connected to the camera 3 .

[0079] Preferably, a light absorbing coating is provided on the inner walls of the side panels 11 , the notch panels 12 and the top cover 13 .

[0080] Preferably, the plurality of cameras 3 are communicatively connected to a two-dimensional code host computer; an audible and visual alarm 4 is disposed on the light shield 1, and the audible and visual alarm 4 is communicatively connected to a two-dimensional code host computer.

[0081] Preferably, a problem part sorting mechanism 5 is provided behind the light shield 1, and the problem part sorting mechanism 5 is connected to the frame of the conveyor mechanism; the problem part sorting mechanism 5 is used to remove the conveyed objects that fail to scan the code from the conveyor mechanism.

[0082] Preferably, the above-mentioned problem part sorting mechanism 5 includes a gantry 51, a lifting beam 52, a moving head 53, an action arm 54, a sorting head 55 and an infrared sensor component 56;

[0083] The gantry 51 is connected to the conveyor belt mechanism, and the two vertical rods of the gantry 51 are respectively vertically fixedly connected to the conveyor belt mechanism, and the horizontal rod is arranged vertically to the conveying direction of the conveyor belt mechanism;

[0084] The gantry 51 is equipped with a lifting beam 52, which is arranged vertically with the vertical rod of the gantry 51 and can move linearly along the vertical rod of the gantry 51 autonomously.

[0085] The lifting beam 52 is equipped with a moving head 53, and the moving head 53 can move linearly along the lifting beam 52 autonomously;

[0086] The moving head 53 is fixedly connected with an action arm 54; the action arm 54 is a bent rod, one end of which is vertically fixedly connected to the action arm 54, and the other end is arranged vertically to the conveying surface of the conveyor belt mechanism;

[0087] The action arm 54 is fixedly connected with a sorting head 55, which is in the shape of a shovel and is used to remove the conveyed objects from the conveyor belt mechanism;

[0088] An infrared sensor component 56 is provided between the gantry 51 and the light shield 1 , and the infrared sensor component 56 is communicatively connected with the problem piece sorting mechanism 5 .

[0089] Among them, the camera 3 and the conveyor belt mechanism are set up as follows:

[0090] Camera 3 is the visual input end of the entire system and is responsible for capturing the QR code of the items on the conveyor belt. The high resolution and high definition of the high-definition industrial camera 3 ensure that the QR code information can be accurately captured. Camera 3 is set on both sides of the conveyor belt and fixed by an adjustable bracket mechanism 2 to ensure that the lens is always aligned with the central axis of the conveyor belt.

[0091] Design of lens hood 1:

[0092] The light shield 1 is used to block external light sources to ensure that the camera 3 is not disturbed when shooting the QR code. Principle: The box-shaped design and internal cavity structure of the light shield 1 can effectively shield external light and improve the accuracy of QR code recognition. The light shield 1 is composed of a side plate 11, a notch plate 12 and a top cover 13, and is connected to the adjustable bracket mechanism 2 through a limit card 14 to form a rectangular frame.

[0093] The structure of the adjustable bracket mechanism 2:

[0094] The adjustable bracket mechanism 2 allows the position of the camera 3 to be flexibly adjusted to meet the shooting requirements of different heights and angles. Through the design of the primary guide rail 21 and the secondary guide rail 24, the camera 3 can be freely moved and fixed in the vertical and horizontal directions. The primary guide rail 21 is vertically fixed to the conveyor frame, and the secondary guide rail 24 is connected to the camera fixing member 25 to achieve accurate positioning of the camera 3.

[0095] The linkage between the sound and light alarm 4 and the problem piece sorting mechanism 5:

[0096] The sound and light alarm 4 is used to sound an alarm when the code scanning fails or an error occurs, and the problem piece sorting mechanism 5 is responsible for removing the failed pieces from the conveyor belt. When the QR code host computer detects that the code scanning fails or an error occurs, it sends a signal to the sound and light alarm 4 and the problem piece sorting mechanism 5, triggering an alarm and performing a sorting action.

[0097] The sound and light alarm 4 is installed on the light shield 1, and the problem part sorting mechanism 5 includes components such as a gantry 51, a lifting beam 52, a moving head 53, an action arm 54 and a sorting head 55, and is connected to the host computer through an infrared sensor component 56.

[0098] Classification and processing of problem items:

[0099] The problem piece sorting mechanism 5 can identify and process two different types of problem pieces: successful code scanning but incorrect information, and failed code scanning. Through the logical judgment of the QR code host computer, these two types of problem pieces can be distinguished and corresponding instructions can be sent to the problem piece sorting mechanism 5. The problem piece sorting mechanism 5 is designed with two exits, corresponding to the two sides of the conveyor belt mechanism, for classifying different types of problem pieces into different positions.

[0100] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A two-dimensional code recognition device for a tobacco sorting line, comprising a camera (3), characterized in that: A plurality of cameras (3) are provided, and are arranged at positions on both sides of the conveyor belt mechanism of the sorting line; the cameras (3) are high-definition industrial cameras with flashlights; the plurality of cameras (3) are connected to the conveyor belt mechanism via two adjustable bracket mechanisms (2) arranged on both sides of the conveyor belt mechanism, so that the lenses of all the cameras (3) point to the central axis position of the conveyor belt mechanism; A light shield (1) is arranged above the plurality of cameras (3) and the two adjustable support mechanisms (2), and the two are placed upside down in the internal cavity of the light shield (1); the light shield (1) is box-shaped, and notches for conveyed objects to pass through are arranged on two sides perpendicular to the conveying direction of the conveyor belt mechanism; the light shield (1) is detachably connected to the adjustable support mechanism (2).

2. A two-dimensional code recognition device for a tobacco sorting line according to claim 1, characterized in that: The light shield (1) comprises a side plate (11), a notch plate (12) and a top cover (13); two of the side plates (11) and two of the notch plates (12) are provided to form a rectangular frame, and the rectangular frame is connected to the adjustable bracket mechanism (2) via a limit card (14) provided on the adjustable bracket mechanism (2); four limit cards (14) are provided, and are respectively provided at the four corners of the two adjustable bracket mechanisms (2).

3. A two-dimensional code recognition device for a tobacco sorting line according to claim 1, characterized in that: The two adjustable support mechanisms (2) are arranged in mirror symmetry; the adjustable support mechanism (2) comprises a primary guide rail (21), a connecting rod (22), an angle bracket (23), a secondary guide rail (24) and a camera fixing member (25); The primary guide rail (21) is provided with a linear through groove, which is arranged in parallel with the conveying direction of the conveyor belt mechanism. The primary guide rail (21) is vertically fixedly connected to the frame of the conveyor belt mechanism through a connecting rod (22); the linear through groove of the primary guide rail (21) is detachably slidably connected to a plurality of angle brackets (23) through fastening bolts, and the angle brackets (23) can rotate freely and move along the linear through groove; the secondary guide rail (24) is provided with a linear through groove, which is detachably slidably connected to the angle brackets (23) through fastening bolts, and the secondary guide rail (24) can rotate freely and move along the direction of the linear through groove; the secondary guide rail (24) is provided with a linear through groove on a side not connected to the angle brackets (23), and the camera fixing piece (25) is detachably rotatably connected to the secondary guide rail (24) through fastening bolts, and the camera fixing piece (25) can rotate freely and move along the linear through groove; The camera fixing member (25) is fixedly connected to the camera (3).

4. A two-dimensional code recognition device for a tobacco sorting line according to claim 2, characterized in that: Light absorbing coatings are provided on the inner walls of the side plates (11), the notched plates (12) and the top cover (13).

5. A two-dimensional code recognition device for a tobacco sorting line according to claim 1, characterized in that: The plurality of cameras (3) are connected to a two-dimensional code host computer for communication; the light shield (1) is provided with an audible and visual alarm (4), and the audible and visual alarm (4) is connected to a two-dimensional code host computer for communication.

6. A two-dimensional code recognition device for a tobacco sorting line according to any one of claims 1 to 5, characterized in that: A problem piece sorting mechanism (5) is arranged behind the light shield (1), and the problem piece sorting mechanism (5) is connected to the frame of the conveyor belt mechanism; the problem piece sorting mechanism (5) is used to remove the conveyed objects that fail to scan the code from the conveyor belt mechanism.

7. A two-dimensional code recognition device for a tobacco sorting line according to claim 6, characterized in that: The problem piece sorting mechanism (5) comprises a gantry (51), a lifting beam (52), a moving head (53), an action arm (54) and a sorting head (55); The gantry (51) is connected to the conveyor belt mechanism, the two vertical rods of the gantry (51) are respectively vertically fixedly connected to the conveyor belt mechanism, and the cross rod is arranged vertically to the conveying direction of the conveyor belt mechanism; The gantry (51) is equipped with a lifting beam (52) connected thereto, the lifting beam (52) is arranged vertically with the vertical rod of the gantry (51), and can autonomously move linearly along the vertical rod of the gantry (51); The lifting beam (52) is equipped with a moving head (53), and the moving head (53) can independently move in a straight line along the lifting beam (52); The moving head (53) is fixedly connected to an action arm (54); the action arm (54) is a bent rod, one end of which is vertically fixedly connected to the action arm (54), and the other end is arranged vertically to the conveying surface of the conveyor belt mechanism; The action arm (54) is fixedly connected with a sorting head (55), and the sorting head (55) is in the shape of a shovel and is used to remove the conveyed objects from the conveyor belt mechanism; An infrared sensor component (56) is provided between the gantry (51) and the light shield (1), and the infrared sensor component (56) is communicatively connected with the problem piece sorting mechanism (5).

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