Cigarette lap paper edge automatic adjusting device based on machine vision and cigarette making machine

Abstract

The utility model discloses an automatic cigarette lap paper edge adjusting device based on machine vision and a cigarette making machine. The automatic cigarette lap paper edge adjusting device comprises a machine vision detecting mechanism, a cloth belt adjusting mechanism, a bobbin paper adjusting mechanism and an early warning removing mechanism which are connected with a cigarette making machine controller. The machine vision detection mechanism is arranged at a lap joint of the cigarette making machine, shoots position images of a cloth belt and bobbin paper and processes the images to obtain an adjusting signal and / or an early warning rejection signal, and the obtained adjusting signal and / or the early warning rejection signal are / is converted into an execution control instruction through a cigarette making machine controller and issued through a corresponding execution intermediate relay; the cloth tape adjusting mechanism, the bobbin paper adjusting mechanism and the early-warning removing mechanism carry out cloth tape position adjustment, bobbin paper edge position adjustment and cigarette removing operation according to execution control instructions issued by the corresponding execution intermediate relays respectively, timely adjustment and automatic restoration are achieved when the cloth tape or the bobbin paper is found to deviate, and the cigarette removing efficiency is improved. Potential quality hazards caused by deviation of edges of the cloth tape and the bobbin paper are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cigarette production by cigarette-making machines, and more specifically to a device for automatically adjusting the overlap paper edge of cigarettes based on machine vision and a cigarette-making machine. Background Art

[0002] The ZJ17 cigarette maker was developed by the German company HUANI in the 1990s and introduced to Changde Cigarette Machinery Factory. The ZJ17's tobacco rod-rolling system primarily rolls tobacco rods. The tobacco rod-rolling process involves the cigarette maker's main drive system driving the cloth belt pulley, which then pulls the paper reel into the rolling and forming tunnel of the cigarette gun. The reel, dragged by the scraper blades in the air chamber, draws the tobacco strips through the mesh and, after initial compression, transforms the rectangular, rounded tobacco rods into the rolling and forming tunnel.

[0003] To ensure the normal operation of the equipment, the cloth belt must be correctly positioned within the tobacco gun track, that is, symmetrical with the center of the tobacco gun's rolling and forming channel. However, during operation, factors such as cloth belt wear can cause the paper edge of the coil to shift from its correct position, causing the paper edge of the coil to shift from the glue nozzle of the gluing system. If the paper edge is lower than the glue nozzle, excess glue will enter the subsequent production process along with the cigarette rod. At the very least, this can cause the rod to slip, and at worst, it can cause some drums of the assembly machine to stick, rendering the equipment inoperable and seriously impacting production. If the paper edge is higher than the nozzle, the overlap of the paper coil will not be firmly bonded, causing the cigarette to burst, thus posing a quality risk. The traditional solution relies on the operator to rely on their experience to check the quality of the cigarettes at the exit and observe the position of the overlap to make adjustments. However, it is impossible for the operator to observe the paper edge in real time, which introduces certain quality risks to normal production.

[0004] In response to the above equipment problems, a device for automatically adjusting the overlap paper edge of cigarettes based on machine vision is studied and designed to achieve the purpose of real-time monitoring and adjustment of the overlap quality of cigarettes. Utility Model Content

[0005] One purpose of the utility model is to provide a new technical solution for a device for automatically adjusting the overlap paper edge of a cigarette and a cigarette making machine based on machine vision.

[0006] According to a first aspect of the present invention, a device for automatically adjusting the overlapped paper edge of a cigarette based on machine vision is provided. The device comprises: a machine vision detection mechanism connected to a cigarette making machine controller, a cloth belt adjustment mechanism, a paper coil adjustment mechanism, and an early warning and rejection mechanism;

[0007] The machine vision detection mechanism is arranged at the intersection of the cigarette making machine, and includes an industrial camera and an image processor connected to the industrial camera; the industrial camera captures the position image of the cloth belt and the paper coil in real time from a direction perpendicular to the movement direction of the cloth belt and the paper coil; the image processor processes the position image of the cloth belt and the paper coil to obtain an adjustment signal and / or an early warning and rejection signal, and part of the output interface of the image processor is connected to the input interface of the cigarette making machine controller via an intermediate relay to send the adjustment signal and / or early warning and rejection signal to the cigarette making machine controller; the cigarette making machine controller converts the adjustment signal and / or early warning and rejection signal into an execution control instruction and sends it via the corresponding execution intermediate relay;

[0008] The cloth belt adjustment mechanism is arranged at the front end of the cigarette gun rolling forming channel, and the cloth belt adjustment mechanism adjusts the cloth belt position according to the execution control instruction issued by the corresponding execution intermediate relay;

[0009] The coil paper adjustment mechanism is arranged at the front end of the cigarette gun rolling forming channel, and the coil paper adjustment mechanism adjusts the position of the coil paper edge according to the execution control instruction issued by the corresponding execution intermediate relay;

[0010] The early warning rejection mechanism is arranged at the rear end of the cigarette rolling and forming channel of the cigarette gun, and the early warning rejection mechanism performs a rejection operation on the corresponding cigarette according to the execution control instruction issued by the corresponding execution intermediate relay.

[0011] Optionally, the tape adjustment mechanism includes:

[0012] A first ball screw is provided on the machine base;

[0013] a cloth belt adjusting wheel, meshing with the first ball screw spiral pair, the cloth belt adjusting wheel being internally connected to the first gear, the cloth belt adjusting wheel and the first gear being an integral structure;

[0014] The cloth belt adjustment servo motor is installed on the machine base;

[0015] a second gear, disposed on an output shaft of the tape adjustment servo motor, the second gear meshing with the first gear;

[0016] The fabric tape adjustment servo motor rotates forward or reverse according to the execution control instruction issued by the corresponding execution intermediate relay, so that the fabric tape moves outward or inward in the groove of the fabric tape adjustment wheel.

[0017] Optionally, the paper coil adjustment mechanism includes:

[0018] The paper reel adjustment servo motor is fixed on the frame;

[0019] a third gear, disposed on the output shaft of the paper-rolling adjustment servo motor;

[0020] a second ball screw meshing with the nut through a screw pair, wherein the second ball screw and the nut are provided with a rack, and the rack meshes with the third gear;

[0021] A paper guide plate, welded to the nut;

[0022] According to the execution control instruction issued by the corresponding execution intermediate relay, the paper adjustment servo motor rotates forward or reverse, and drives the second ball screw and the nut to move forward and backward through the third gear and the rack transmission, thereby driving the paper guide paper to move forward and backward.

[0023] Optionally, the early warning rejection mechanism includes:

[0024] A synchronous gear is provided on the main transmission shaft;

[0025] The step signal proximity switch is set on the frame and located above the synchronous gear;

[0026] When the synchronous gear rotates to the position below the step signal proximity switch, the step signal proximity switch generates a step signal and transmits it to the cigarette making machine controller.

[0027] Optionally, the image processor is pre-set with a tape upward adjustment threshold, a tape downward adjustment threshold, a tape upper limit alarm value, a tape lower limit alarm value, a paper roll upward adjustment threshold, a paper roll downward adjustment threshold, a paper roll upper limit alarm value and a paper roll lower limit alarm value.

[0028] Optionally, the 01 output interface of the image processor is connected to the Q0.1 input interface of the cigarette making machine controller via the cloth belt upward movement relay, the 02 output interface of the image processor is connected to the Q0.2 input interface of the cigarette making machine controller via the cloth belt downward movement relay, the 03 output interface of the image processor is connected to the Q0.3 input interface of the cigarette making machine controller via the cloth belt upper limit alarm relay, the 04 output interface of the image processor is connected to the Q0.4 input interface of the cigarette making machine controller via the cloth belt lower limit alarm relay, the 11 output interface of the image processor is connected to the Q1.1 input interface of the cigarette making machine controller via the paper roll upward movement relay, the 12 output interface of the image processor is connected to the Q1.2 input interface of the cigarette making machine controller via the paper roll downward movement relay, the 13 output interface of the image processor is connected to the Q1.3 input interface of the cigarette making machine controller via the paper roll upper limit alarm relay, and the 14 output interface of the image processor is connected to the Q1.4 input interface of the cigarette making machine controller via the paper roll lower limit alarm relay.

[0029] Optionally, the execution intermediate relay includes: a cloth tape upward movement execution relay and a cloth tape downward movement execution relay connected to the cloth tape adjustment mechanism, a paper reel upward movement execution relay and a paper reel downward movement execution relay connected to the paper reel adjustment mechanism, and a cloth tape deviation alarm relay and a paper reel deviation alarm relay connected to the early warning rejection mechanism.

[0030] Optionally, the tape adjusting wheel is provided with a first manual knob, and the tape is moved outward or inward in the groove of the tape adjusting wheel by manually rotating the first manual knob.

[0031] Optionally, a second manual knob is provided on the nut, and the paper guide plate is driven to move forward and backward by manually rotating the second manual knob.

[0032] According to a second aspect of the present invention, a cigarette-making machine is provided, comprising the automatic adjustment device for the overlap paper edge of a cigarette based on machine vision as described in the first aspect of the present invention.

[0033] According to an embodiment disclosed in the present utility model, the following beneficial effects are achieved:

[0034] The utility model is a device for automatically adjusting the paper edge of the cigarette overlap based on machine vision. The machine vision technology is used to monitor the position of the cloth belt and the paper edge of the coil at the overlap of the cigarette and the position of the cloth belt and the paper edge of the coil are automatically adjusted through the cloth belt adjustment mechanism and the paper coil adjustment mechanism, thereby reducing the quality risks of the normal operation of the cigarette making machine and reducing the labor intensity of the operator.

[0035] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0037] Figure 1 This is a structural block diagram of a device for automatically adjusting the overlap paper edge of a cigarette based on machine vision according to an embodiment;

[0038] Figure 2 Schematic diagram of the structure of a cloth tape adjustment mechanism in a device for automatically adjusting the overlap paper edge of a cigarette based on machine vision according to an embodiment;

[0039] Figure 3 A schematic structural diagram of a paper coil adjustment mechanism in a device for automatically adjusting the overlapped paper edge of a cigarette based on machine vision according to an embodiment;

[0040] Figure 4A schematic structural diagram of a warning and rejection mechanism in a machine vision-based automatic adjustment device for overlapping paper edges of cigarettes according to an embodiment;

[0041] Figure 5 This is an electrical schematic diagram of a machine vision detection mechanism in a machine vision-based automatic adjustment device for the overlap paper edge of a cigarette according to an embodiment;

[0042] Figure 6 An electrical schematic diagram of a cigarette making machine controller according to an embodiment;

[0043] Figure 7 This is an electrical schematic diagram of an intermediate relay in a machine vision-based automatic adjustment device for the overlap paper edge of a cigarette according to an embodiment;

[0044] Figure 8 This is an electrical schematic diagram of a servo motor in a machine vision-based automatic adjustment device for the overlap paper edge of a cigarette provided according to an embodiment.

[0045] Description of reference numerals:

[0046] Cigarette making machine controller 1; machine vision detection mechanism 2; cloth belt adjustment mechanism 3, paper coil adjustment mechanism 4; early warning rejection mechanism 5; cloth belt 6;

[0047] Industrial camera 21; image processor 22; first ball screw 31; machine base 32; tape adjustment wheel 33; first gear 34; tape adjustment servo motor 35; second gear 36; first manual knob 37; tape guide wheel 38; paper winding adjustment servo motor 41; frame 42; third gear 43; nut 44; rack 45; paper winding guide plate 46; second manual knob 47; synchronization gear 51; main transmission shaft 52; step signal proximity switch 53. DETAILED DESCRIPTION

[0048] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0049] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0050] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0051] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0052] Example 1:

[0053] See also Figure 1 As shown, this embodiment provides a device for automatically adjusting the overlapped paper edge of a cigarette based on machine vision. The device comprises: a machine vision detection mechanism 2 connected to a cigarette making machine controller 1, a cloth belt adjustment mechanism 3, a paper coil adjustment mechanism 4, and an early warning rejection mechanism 5;

[0054] The machine vision detection mechanism 2 is arranged at the intersection of the cigarette making machine and includes an industrial camera 21 and an image processor 22 connected to the industrial camera 21. The industrial camera 21 captures the position images of the cloth belt and paper coil in real time from a direction perpendicular to the movement direction of the cloth belt and paper coil. The image processor 22 processes the position images of the cloth belt and paper coil to obtain adjustment signals and / or early warning and rejection signals. Part of the output interface of the image processor 22 is connected to the input interface of the cigarette making machine controller 1 via an intermediate relay to send the adjustment signals and / or early warning and rejection signals to the cigarette making machine controller 1. The cigarette making machine controller 1 converts the adjustment signals and / or early warning and rejection signals into execution control instructions and sends them down via the corresponding execution intermediate relay.

[0055] The cloth tape adjustment mechanism 3 is arranged at the front end of the cigarette gun rolling forming channel, and the cloth tape adjustment mechanism 3 adjusts the cloth tape position according to the execution control instruction issued by the corresponding execution intermediate relay;

[0056] The coil paper adjustment mechanism 4 is arranged at the front end of the cigarette gun rolling forming channel. The coil paper adjustment mechanism 4 adjusts the position of the coil paper edge according to the execution control instruction issued by the corresponding execution intermediate relay;

[0057] The early warning rejection mechanism 5 is arranged at the rear end of the cigarette rolling and forming channel of the cigarette gun. The early warning rejection mechanism 5 rejects the corresponding cigarettes according to the execution control instructions issued by the corresponding execution intermediate relay.

[0058] It should be noted that the cigarette making machine controller 1 in this embodiment is a programmable logic controller (PLC). Of course, it can also be other types of controllers, which will not be listed here one by one.

[0059] Alternatively, see Figure 2 As shown, the cloth tape adjustment mechanism 3 in the automatic adjustment device for the overlap paper edge of a cigarette based on machine vision in the embodiment of the present invention includes:

[0060] The first ball screw 31 is mounted on the machine base 32;

[0061] The cloth belt adjusting wheel 33 is meshed with the helical pair of the first ball screw 31 , and the cloth belt adjusting wheel 33 is internally connected to the first gear 34 , and the cloth belt adjusting wheel 33 and the first gear 34 are an integrated structure;

[0062] The cloth belt adjustment servo motor 35 is installed on the machine base 32;

[0063] The second gear 36 is provided on the output shaft of the tape adjustment servo motor 35 , and the second gear 36 is meshed with the first gear 34 ;

[0064] The fabric tape adjustment servo motor 35 rotates forward or reverse according to the execution control instruction issued by the corresponding execution intermediate relay, so that the fabric tape 6 moves outward or inward in the groove of the fabric tape adjustment wheel 33 .

[0065] Alternatively, see Figure 3 As shown, the paper coil adjustment mechanism 4 in the automatic adjustment device for the overlapped paper edge of cigarettes based on machine vision in the embodiment of the present invention includes:

[0066] The paper roll adjustment servo motor 41 is fixed on the frame 42;

[0067] The third gear 43 is provided on the output shaft of the paper-rolling adjustment servo motor 41;

[0068] The second ball screw is meshed with the nut 44 through a screw pair. A rack 45 is provided on the second ball screw and the nut 44. The rack 45 is meshed with the third gear 43.

[0069] The paper guide plate 46 is welded to the nut 44;

[0070] According to the execution control instruction issued by the corresponding execution intermediate relay, the paper adjustment servo motor 41 rotates forward or reverse, and drives the second ball screw and nut 44 to move forward and backward through the third gear 43 and rack 45, thereby driving the paper guide 46 to move forward and backward.

[0071] Alternatively, see Figure 4 As shown, the early warning and rejection mechanism 5 in the automatic adjustment device for the overlap paper edge of cigarettes based on machine vision in the embodiment of the present invention includes:

[0072] Synchronous gear 51, provided on the main transmission shaft 52;

[0073] The step signal proximity switch 53 is provided on the frame and is located above the synchronous gear 51;

[0074] When the synchronous gear 51 rotates to below the step signal proximity switch 53 , the step signal proximity switch 53 generates a step signal and transmits it to the cigarette making machine controller 1 .

[0075] Optionally, the image processor 22 in the automatic adjustment device for the overlapped paper edge of a cigarette based on machine vision in an embodiment of the present invention is pre-set with a cloth tape upward adjustment threshold, a cloth tape downward adjustment threshold, a cloth tape upper limit alarm value, a cloth tape lower limit alarm value, a paper roll upward adjustment threshold, a paper roll downward adjustment threshold, a paper roll upper limit alarm value, and a paper roll lower limit alarm value.

[0076] It should be noted that in this embodiment, a pre-photographed image of a standard tape is required as a template to determine the tape standard template value set, namely: tape upward adjustment threshold BT1, tape downward adjustment threshold BT2, tape upper limit alarm value BH1, and tape lower limit alarm value BH2. In this embodiment, the machine vision inspection module uses an industrial camera to track and photograph the position of the running tape, converting the tape position in the image into a numerical signal. The real-time numerical signal is then compared with the pre-set values of the tape standard template. Similarly, in this embodiment, a pre-photographed image of a standard paper roll edge is required as a template to determine the paper roll standard template value set, namely: paper roll upward adjustment threshold ZT1, paper roll downward adjustment threshold ZT2, paper roll upper limit alarm value ZH1, and paper roll lower limit alarm value ZH2. The machine vision inspection module uses an industrial camera to track and photograph the position of the running paper roll edge, converting the image into a numerical signal. The real-time numerical signal is then compared with the pre-set values of the paper roll standard template.

[0077] Alternatively, see Figure 5 As shown, in the automatic adjustment device for the overlapped paper edge of a cigarette based on machine vision in the embodiment of the utility model, the 01 output interface of the image processor is connected to the Q0.1 input interface of the cigarette making machine controller via the cloth belt upward movement relay K01, the 02 output interface of the image processor is connected to the Q0.2 input interface of the cigarette making machine controller via the cloth belt downward movement relay K02, the 03 output interface of the image processor is connected to the Q0.3 input interface of the cigarette making machine controller via the cloth belt upper limit alarm relay K03, the 04 output interface of the image processor is connected to the Q0.4 input interface of the cigarette making machine controller via the cloth belt lower limit alarm relay K04, the 11 output interface of the image processor is connected to the Q1.1 input interface of the cigarette making machine controller via the paper roll upward movement relay K11, and the 12 output interface of the image processor is connected to the Q1.1 input interface of the cigarette making machine controller via the paper roll downward movement relay K 12 is connected to the Q1.2 input interface of the cigarette making machine controller, the 13 output interface of the image processor is connected to the Q1.3 input interface of the cigarette making machine controller via the paper upper limit alarm relay K13, and the 14 output interface of the image processor is connected to the Q1.4 input interface of the cigarette making machine controller via the paper lower limit alarm relay K14.

[0078] Alternatively, see Figure 6As shown, the execution intermediate relays in the automatic adjustment device for the overlap paper edge of cigarettes based on machine vision in the embodiment of the utility model include: a cloth tape upward movement execution relay K100 and a cloth tape downward movement execution relay K101 connected to the cloth tape adjustment mechanism 3, a paper roll upward movement execution relay K110 and a paper roll downward movement execution relay K111 connected to the paper roll adjustment mechanism 4, and a cloth tape offset alarm relay K102 and a paper roll offset alarm relay K112 connected to the early warning rejection mechanism 5.

[0079] Alternatively, see Figure 2 As shown, in the machine vision-based automatic adjustment device for the overlapped paper edge of a cigarette in an embodiment of the present invention, a first manual knob 37 is provided on the cloth tape adjustment wheel 33. By manually rotating the first manual knob 37, the cloth tape 7 is moved outward or inward in the groove of the cloth tape adjustment wheel 33.

[0080] Alternatively, see Figure 3 As shown, in the machine vision-based automatic adjustment device for the overlapped paper edge of a cigarette according to an embodiment of the present invention, a second manual knob 47 is provided on the nut 44 , and the paper guide 46 is driven to move forward and backward by manually rotating the second manual knob 47 .

[0081] For details, see Figure 2 As shown, the principle of automatic belt height adjustment in this embodiment is as follows: a belt adjustment servo motor 35 is mounted on the machine base 32, and a second gear 36 is mounted on the output shaft of the belt adjustment servo motor 35. Furthermore, a first gear 34 is internally connected to the belt adjustment wheel 33. The first gear 34 and the belt adjustment wheel 33 are integrated and can move inward or outward synchronously. When the height of the fabric belt is automatically adjusted, when the fabric belt adjustment servo motor 35 rotates forward, the second gear 36 on the motor output shaft and the first gear 34 connected to the fabric belt adjusting wheel 33 are externally meshed, so that the fabric belt adjusting wheel 33 is reversed. Therefore, the fabric belt starts to move outward in the groove of the fabric belt adjusting wheel 33, thereby adjusting the outer edge of the fabric belt to be higher and the inner edge to be lower. Conversely, when the fabric belt adjustment servo motor 35 rotates backward, the second gear 36 on the motor output shaft and the first gear 34 connected to the fabric belt adjusting wheel 33 are externally meshed, thereby causing the fabric belt adjusting wheel 33 to rotate forward. Therefore, the fabric belt starts to move inward in the groove of the fabric belt adjusting wheel 33, thereby achieving the goal of lowering the outer edge of the fabric belt and raising the inner edge.

[0082] When the first manual knob 37 is manually rotated, the belt adjusting wheel 33 follows the first manual knob 37 and starts to move back and forth on the first ball screw 31. When the first manual knob 37 is rotated clockwise, the belt adjusting wheel 33 slides inward. Since the belt passes through the groove of the belt adjusting wheel 33, the belt moves inward in the groove of the belt adjusting wheel 33, thereby achieving a higher inner side and lower outer side of the belt; conversely, when the first manual knob 37 is rotated counterclockwise, the belt adjusting wheel 33 slides outward on the first ball screw 31. Since the belt passes through the groove of the belt adjusting wheel 33, the belt moves outward in the groove of the belt adjusting wheel 33, thereby achieving a higher outer side and lower inner side of the belt.

[0083] For details, see Figure 3 As shown, the principle of automatic paper stack height adjustment in this embodiment is as follows: a paper stack adjustment servo motor 41 is fixed to a frame 42, and a rack 45 attached to a second ball screw and nut 44 meshes with a third gear 43 on the motor's output shaft. In automatic mode, when the paper stack adjustment servo motor 41 rotates forward or reverse, it meshes with the rack 45 attached to the second ball screw and nut 44, causing the rack 45 and nut 44 to move forward and backward simultaneously. Because the paper stack guide 46 is fixed to the nut 44, the third gear 43 and rack 45 drive the second ball screw and nut back and forth, thereby moving the paper stack guide 46 back and forth, ultimately causing the paper stack to move forward and backward, achieving automatic paper stack height adjustment.

[0084] The manual paper roll height adjustment mechanism in this embodiment is as follows: the second ball screw and nut 44 engage via a screw pair, while the nut 44 is welded to the paper roll guide 46. During manual operation, the second ball screw is manually rotated, causing the nut 44 to move back and forth along the screw. Because the nut 44 and paper roll guide 46 are welded together, the paper roll guide 46 follows the nut 44, causing the paper roll to move back and forth, creating a height difference between the inside and outside of the paper roll.

[0085] For details, see Figure 4 As shown, the defective cigarette rejection principle in this embodiment is as follows: a synchronous gear 51 mounted on the main transmission shaft 52 rotates with the main transmission shaft 52, cooperating with a step signal proximity switch 53 above the synchronous gear 51. When the synchronous gear 51 rotates and the gear teeth rotate below the step signal proximity switch 53, a step signal is generated. The step signal is transmitted to the cigarette making machine controller (i.e., PLC), providing a synchronization signal for defective cigarette rejection, ensuring complete rejection.

[0086] In this embodiment, the image processor 22 is powered by a 24V DC power supply. The industrial camera 21 is connected to the image processor 22 via a dedicated interface. Some output interfaces of the image processor 22 are connected to an intermediate relay. The industrial camera 21's lens captures the edge positions of the tape and paper roll in real time. When setting the image window and parameters for the first time, the cigarette making machine must be started and the tape and paper roll edges must be adjusted to their standard positions. The camera's tape and paper roll standard windows must be set and their parameters adjusted accordingly.

[0087] See also Figure 5-8 As shown in Table 1, when the belt deviates, the image processor setting parameters and working mode are as follows:

[0088] Set the tape upward adjustment threshold BT1, tape downward adjustment threshold BT2, tape upper and lower alarm values BH1, and tape lower alarm value BH2. When the cigarette making machine operates for a long time, the tape elasticity weakens, causing it to loosen. This loose tape can deviate (the deviation is small and does not affect product quality). Alternatively, if there is dirt accumulation on the tape guide pulley or the guide pulley rotates unevenly, the tape position can deviate (the deviation is small and does not affect product quality). The real-time parameters (i.e., the real-time numerical signal) of the tape window will change. When the real-time numerical signal is greater than BT1 or less than BT2, the output signals 01 and 02 are sent to the tape upward relay K01 and the tape downward relay K02, interacting with DC0V to energize the K01 and K02 coils. When the tape offset is too large (affecting product quality), even greater than BH1 or less than BH2, the output signals 03 and 04 are sent to the tape upper limit alarm relay K03 and the tape lower limit alarm relay K04, and cooperate with DC0V to energize the K03 and K04 coils.

[0089] When the paper is off track, the image processor sets parameters and works as follows:

[0090] Set the paper roll upward adjustment threshold ZT1, paper roll downward adjustment threshold ZT2, paper roll upper limit alarm value ZH1, and paper roll lower limit alarm value ZH2. If the paper rolls overlap and the section after the overlap deviates (the deviation is small and does not affect product quality), or if there is dirt accumulation on the paper roll guide rollers or the guide rollers rotate unevenly, the real-time parameters (i.e., the real-time numerical signals) of the paper roll window will change. When the real-time numerical signals are greater than ZT1 or less than ZT2, signals 11 and 12 are output to the paper roll upward relays K11 and K12, interacting with DC0V to energize the K11 and K12 coils. When the paper winding offset is too large (affecting product quality), even greater than ZH1 or less than ZH2, the output signals 13 and 14 are sent to the paper winding upper limit alarm relay K13 and the paper winding lower limit alarm relay K14, and cooperate with DC0V to energize the K13 and K14 coils.

[0091] After the cigarette making machine is running, its operating signal enters the PLC (cigarette making machine controller 1) through input terminal I0.0. Next, the tobacco rod is formed by the cloth belt and enters the cigarette gun. Then the tobacco rod maker opens and cuts the tobacco rod. The cigarette making machine enters the high-speed state and generates a high-speed enable signal. The high-speed enable signal enters the PLC through input terminal I0.5. After receiving the cigarette making machine operating signal and the high-speed enable signal, the PLC starts the automatic adjustment mechanism. In addition, the step signal proximity switch installed on the synchronous gear of the main drive shaft of the cigarette making machine provides a synchronization signal for the displacement and rejection of defective cigarettes. Because the synchronous gear installed on the main drive shaft has 27 grooves per circle, the main drive shaft generates 27 synchronization signals when it rotates one circle. The air chamber blockage signal provides a stop command for this automatic adjustment device. The details are as follows:

[0092] 1. When the tape deviates significantly (impacting product quality), coils K01 or K02 from the image processor energize, closing the normally open contacts. Signals 001 and 002 are transmitted through the normally open contacts to the PLC input interface and enter the PLC via input terminals I0.1 and I0.2. After program processing, tape movement signals 100 and 101 are output to the output interface and output via Q0.0 and Q0.1. When the tape deviates significantly (affecting product quality), coils K03 and K04 from the image processor energize, closing the normally open contacts. Signals 003 and 004 are transmitted through the normally open contacts to the PLC input interface and enter the PLC via input terminals I0.3 and I0.4. The program then begins recording the synchronization signal from the step signal proximity switch. When the accumulated step signal reaches a preset value, the defective cigarette alarm and rejection signal 102 is activated and output via output interface Q0.2.

[0093] 2. When the paper roll deviates (minor deviation, not affecting product quality), coils K11 or K12 from the image processor energize, closing the normally open contacts. Signals 011 and 012 are transmitted through the normally open contacts to the PLC input interface and enter the PLC via input terminals I1.1 and I1.2. The cigarette making machine operation signal enters the PLC via input terminal I0.0. After program processing, paper roll movement signals 110 and 111 are output to the output interface and output via Q1.0 and Q1.1. If the paper roll deviates significantly (affecting product quality), coils K13 and K14 from the image processing unit energize, closing the normally open contacts. Signals 013 and 014 are transmitted through the normally open contacts to the PLC input interface and enter the PLC via input terminals I1.3 and I1.4. At this time, the program starts to record the synchronization signal from the step signal proximity switch. When the step signal accumulates to a preset value, the defective cigarette alarm rejection signal 112 is activated and output through the output interface Q1.2.

[0094] If the air chamber becomes clogged during cigarette making, a signal is transmitted to the PLC via input terminal I1.5, interrupting the automatic adjustment function. This prevents the tobacco from filling the tobacco rod completely, resulting in uneven edges and uneven paper. This causes the paper edges and the tape to be positioned abnormally. The automatic adjustment device of this embodiment promptly stops adjusting, preventing glue overflow caused by unsatisfactory automatic adjustment during this abnormal state, which could lead to product quality defects and equipment failure.

[0095] More specifically, after the cigarette making machine is started, the machine operation signal is transmitted to the belt-adjusting motor servo controller as a start-up signal. If the belt deviates (the deviation is minor and does not affect product quality), the belt movement command 100 or 101 from the PLC control unit is transmitted to the coil of the belt-upward movement execution relay K100 or belt-downward movement execution relay K101 in the execution unit. This, in conjunction with DC0V, energizes the coil and closes the normally open contact. After passing through the normally open contact, the upward movement signal 1000 or downward movement signal 1001 is transmitted to the command voltage terminal of the belt-adjusting motor servo controller. When 1000 is connected, the belt-adjusting servo motor M1 rotates forward, controlling the upward movement of the belt. When 1001 is connected, the belt-adjusting servo motor rotates reversely, controlling the downward movement of the belt. When the belt is corrected to the standard position, the image processors O1 and O2 no longer output signals, the belt-adjusting motor servo controller loses command voltage, and motor M1 stops operating. If the tape deviates excessively (impacting product quality), the PLC transmits a tape deviation alarm command 102 to the execution unit's tape deviation alarm relay K102, energizing the coil. This normally open contact activates the cigarette machine's reject function, removing defective products.

[0096] After the cigarette making machine starts, the machine operation signal is transmitted to the paper winding motor servo controller as a start signal. If the paper winding deviates (the deviation is minor and does not affect product quality), the PLC control unit transmits paper winding movement commands 110 or 111 to the coils of the paper winding upward movement execution relay K110 or paper winding downward movement execution relay K111 in the execution unit. This, combined with the DC0V voltage, energizes the coils, closing the normally open contacts. After passing through the normally open contacts, the upward movement signal 1100 or downward movement signal 1101 is transmitted to the command voltage terminal of the paper winding motor servo controller. When 1100 is energized, Pan Zhi adjusts servo motor M2 to rotate forward, controlling upward paper winding. When 1101 is energized, the paper winding adjustment servo motor reverses, controlling downward paper winding. When the paper winding is corrected to the standard position, the image processors 11 and 12 no longer output signals, the paper winding motor servo controller loses command voltage, and motor M2 stops operating. If the paper roll deviates significantly (affecting product quality), the PLC transmits the paper roll deviation alarm command 112 to the execution unit's paper roll deviation alarm relay K112, energizing the coil. This normally open contact activates the cigarette making machine's reject function, removing defective products.

[0097] Table 1: Symbols for related electrical control components

[0098]

[0099] In summary, the machine vision-based automatic adjustment device for the overlapped paper edge of cigarettes in this embodiment uses machine vision technology to monitor the position of the cloth tape and the paper edge of the coil at the overlapped end of the cigarettes and automatically adjusts the position of the cloth tape and the paper edge of the coil through the cloth tape adjustment mechanism and the paper coil adjustment mechanism, thereby reducing the quality risks of the normal operation of the cigarette making machine and reducing the labor intensity of the operator.

[0100] Example 2:

[0101] This embodiment provides a cigarette-making machine, comprising the automatic adjustment device for the overlap paper edge of a cigarette based on machine vision as described in the first embodiment above.

[0102] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will appreciate that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A device for automatically adjusting the overlapped paper edge of a cigarette based on machine vision, characterized in that: The device comprises: a machine vision detection mechanism connected to the cigarette making machine controller, a cloth belt adjustment mechanism, a paper coil adjustment mechanism and an early warning rejection mechanism; The machine vision detection mechanism is arranged at the intersection of the cigarette making machine, and includes an industrial camera and an image processor connected to the industrial camera; the industrial camera captures the position image of the cloth belt and the paper coil in real time from a direction perpendicular to the movement direction of the cloth belt and the paper coil; the image processor processes the position image of the cloth belt and the paper coil to obtain an adjustment signal and / or an early warning and rejection signal, and part of the output interface of the image processor is connected to the input interface of the cigarette making machine controller via an intermediate relay to send the adjustment signal and / or early warning and rejection signal to the cigarette making machine controller; the cigarette making machine controller converts the adjustment signal and / or early warning and rejection signal into an execution control instruction and sends it via the corresponding execution intermediate relay; The cloth belt adjustment mechanism is arranged at the front end of the cigarette gun rolling forming channel, and the cloth belt adjustment mechanism adjusts the cloth belt position according to the execution control instruction issued by the corresponding execution intermediate relay; The coil paper adjustment mechanism is arranged at the front end of the cigarette gun rolling forming channel, and the coil paper adjustment mechanism adjusts the position of the coil paper edge according to the execution control instruction issued by the corresponding execution intermediate relay; The early warning rejection mechanism is arranged at the rear end of the cigarette rolling and forming channel of the cigarette gun, and the early warning rejection mechanism performs a rejection operation on the corresponding cigarette according to the execution control instruction issued by the corresponding execution intermediate relay.

2. The automatic adjustment device for the overlapped paper edge of a cigarette based on machine vision according to claim 1 is characterized in that: The tape adjustment mechanism comprises: A first ball screw is provided on the machine base; a cloth belt adjusting wheel, meshing with the first ball screw spiral pair, the cloth belt adjusting wheel being internally connected to the first gear, the cloth belt adjusting wheel and the first gear being an integral structure; The cloth belt adjustment servo motor is installed on the machine base; a second gear, disposed on an output shaft of the tape adjustment servo motor, the second gear meshing with the first gear; The fabric tape adjustment servo motor rotates forward or reverse according to the execution control instruction issued by the corresponding execution intermediate relay, so that the fabric tape moves outward or inward in the groove of the fabric tape adjustment wheel.

3. The automatic adjustment device for the overlap paper edge of a cigarette based on machine vision according to claim 1 is characterized in that: The paper coil adjustment mechanism includes: The paper reel adjustment servo motor is fixed on the frame; a third gear, disposed on the output shaft of the paper-rolling adjustment servo motor; a second ball screw meshing with the nut through a screw pair, wherein the second ball screw and the nut are provided with a rack, and the rack meshes with the third gear; A paper guide plate, welded to the nut; According to the execution control instruction issued by the corresponding execution intermediate relay, the paper adjustment servo motor rotates forward or reverse, and drives the second ball screw and the nut to move forward and backward through the third gear and the rack transmission, thereby driving the paper guide paper to move forward and backward.

4. The automatic adjustment device for the overlap paper edge of a cigarette based on machine vision according to claim 1, characterized in that: The early warning and elimination mechanism includes: A synchronous gear is provided on the main transmission shaft; The step signal proximity switch is set on the frame and located above the synchronous gear; When the synchronous gear rotates to the position below the step signal proximity switch, the step signal proximity switch generates a step signal and transmits it to the cigarette making machine controller.

5. The automatic adjustment device for the overlap paper edge of a cigarette based on machine vision according to claim 1 is characterized in that: The image processor is pre-set with a tape upward adjustment threshold, a tape downward adjustment threshold, a tape upper limit alarm value, a tape lower limit alarm value, a paper tray upward adjustment threshold, a paper tray downward adjustment threshold, a paper tray upper limit alarm value and a paper tray lower limit alarm value.

6. The automatic adjustment device for the overlap paper edge of a cigarette based on machine vision according to claim 1 is characterized in that: The 01 output interface of the image processor is connected to the Q0.1 input interface of the cigarette making machine controller via the cloth belt upward movement relay, the 02 output interface of the image processor is connected to the Q0.2 input interface of the cigarette making machine controller via the cloth belt downward movement relay, the 03 output interface of the image processor is connected to the Q0.3 input interface of the cigarette making machine controller via the cloth belt upper limit alarm relay, the 04 output interface of the image processor is connected to the Q0.4 input interface of the cigarette making machine controller via the cloth belt lower limit alarm relay, the 11 output interface of the image processor is connected to the Q1.1 input interface of the cigarette making machine controller via the paper roll upward movement relay, the 12 output interface of the image processor is connected to the Q1.2 input interface of the cigarette making machine controller via the paper roll downward movement relay, the 13 output interface of the image processor is connected to the Q1.3 input interface of the cigarette making machine controller via the paper roll upper limit alarm relay, and the 14 output interface of the image processor is connected to the Q1.4 input interface of the cigarette making machine controller via the paper roll lower limit alarm relay.

7. The automatic adjustment device for the overlap paper edge of a cigarette based on machine vision according to claim 6, characterized in that: The execution intermediate relay includes: a cloth belt upward movement execution relay and a cloth belt downward movement execution relay connected to the cloth belt adjustment mechanism, a paper reel upward movement execution relay and a paper reel downward movement execution relay connected to the paper reel adjustment mechanism, and a cloth belt deviation alarm relay and a paper reel deviation alarm relay connected to the early warning rejection mechanism.

8. The automatic adjustment device for the overlap paper edge of a cigarette based on machine vision according to claim 2 is characterized in that: The tape adjusting wheel is provided with a first manual knob, and the tape is moved outward or inward in the groove of the tape adjusting wheel by manually rotating the first manual knob.

9. The automatic adjustment device for the overlap paper edge of a cigarette based on machine vision according to claim 3 is characterized in that: A second manual knob is provided on the nut, and the paper guide plate is driven to move forward and backward by manually rotating the second manual knob.

10. A cigarette making machine, characterized in that: It comprises the automatic adjustment device for the overlap paper edge of a cigarette based on machine vision as described in any one of claims 1 to 9.

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