System and method for dynamically controlling sliver rejecting amount of cigarette making machine

Abstract

The invention belongs to the technical field of cigarette production, and particularly relates to a dynamic control system and method for sliver removal of a cigarette making machine, and the system comprises a sliver removal amount detection mechanism which detects the sliver content in discharged materials in real time; the feedback adjusting mechanism comprises an electric proportional valve and an opening degree adjusting mechanism which are respectively used for adjusting the air pressure, the air volume and the opening degree of the air inlet; and the controller is in communication connection with the detecting mechanism and the adjusting mechanism, adjusts the winnowing parameters according to the sliver content signal, communicates with the MES system and realizes data uploading and process parameter receiving. The system realizes dynamic closed-loop regulation of air pressure and air volume, reduces manual intervention, and improves control precision and response speed.

Description

Technical Field

[0001] The present invention belongs to the technical field of cigarette production, and particularly relates to a dynamic control system and method for removing stem tags in a cigarette making machine. Background Art

[0002] The three-stage air separation mechanism of a cigarette making machine is the core device for tobacco purification, responsible for separating impurities such as stem tags and wet mass tobacco in the tobacco. Its three-stage air separation mainly includes: the first-stage air separation is used to initially screen out large particle stem tags; the second-stage air separation controls the air flow rate and air pressure entering the box by adjusting the opening degree of the air inlet damper provided on the side wall of the air separation box of the second-stage air mechanism, to achieve further separation of small particle stem tags; the third-stage air separation relies on the valve or negative pressure adjustment mechanism at the end of the air pipeline to control the final rejection amount to ensure the purity of the tobacco.

[0003] Although the three-stage air separation system can significantly improve the quality of tobacco, in traditional technologies, the second and third-stage air separation links still highly rely on manual knob or valve settings, resulting in low adjustment accuracy, lagging response, and often requiring manual sampling and off-line analysis for detection, with a long detection cycle and low coverage rate. Eventually, real-time feedback and closed-loop adjustment cannot be carried out for each cigarette, making it difficult to ensure the stability of the production line and the consistency of tobacco purity.

[0004] To solve at least one of the above problems, this application is proposed. Summary of the Invention

[0005] The object of the present invention is to address the deficiencies of the existing three-stage air separation stem removal mechanism that highly relies on manual pressure regulation, has low detection efficiency and poor real-time performance. A dynamic control system and method for removing stem tags in a cigarette making machine are proposed. Through on-line real-time monitoring and closed-loop feedback, automatic adjustment of the air separation negative pressure and precise control of the stem removal amount are achieved, thereby significantly reducing the manual intervention cost and improving the production response speed and stability. This system combines existing algorithms to continuously analyze the air pressure, air volume, and stem removal effect of the first-stage to third-stage air separation boxes on-line in real time, and feeds back the analysis results to the execution unit in real time, automatically adjusting the sampling and air pressure parameters to achieve full-process automation and intelligent operation, ensuring that the stem removal efficiency and tobacco purity reach the optimal.

[0006] The present invention adopts the following technical solutions:

[0007] In the first aspect of the present invention, a control system for the stem removal amount of a cigarette making machine is provided, including an MES system. The system further includes:

[0008] A stem tag removal amount detection mechanism 2 installed on one side of the discharge port of the existing three-stage air separation device 1, used to detect the stem tag content in the discharged material in real time;

[0009] A feedback adjustment mechanism, including:

[0010] An electric proportional valve installed at the end of the existing three-stage air separation air duct is used to adjust the air pressure and / or air volume in the air separation device; preferably, the target value is set by the process parameter instruction provided by the MES system;

[0011] An opening degree adjusting mechanism 4 installed at the air inlet 31 of the existing secondary air separation device 3 is used to adjust the opening degree of the air separation air inlet;

[0012] A controller, communicatively connected to the stem and sticker rejection amount detection mechanism 2 and the opening degree adjusting mechanism 4, is used to receive the stem and sticker content signal collected by the stem and sticker rejection amount detection mechanism and adjust the working states of the electric proportional valve and the opening degree adjusting mechanism based on this signal; the controller is also communicatively connected to the MES system, and is used to upload the rejection amount data and receive the process parameter instruction.

[0013] Preferably, the stem and sticker rejection amount detection mechanism 2 includes:

[0014] A sampling and weighing mechanism 21, including a bracket 211, a weighing sensor 212, a tray 213, a rotation driving unit 214, a connecting arm 215, and a first driving device 216; the rotation driving unit 214 is fixedly installed on the bracket 211, and its vertically arranged output shaft is fixedly connected to one end of the connecting arm 215, and is used to drive the connecting arm 215 to rotate around the vertical axis, so as to drive the tray 213 to switch between the material receiving position and the image acquisition position;

[0015] The connecting arm 215 extends horizontally, and the other end thereof is fixedly connected to the housing of the first driving device 216; the axis of the output shaft of the first driving device 216 is parallel to the extending direction of the connecting arm 215 and is connected to the installation section of the weighing sensor 212, and is used to drive the tray 213 to flip or reset in the vertical plane;

[0016] The bearing end of the weighing sensor 212 is connected to the tray 213.

[0017] Preferably, the stem and sticker rejection amount detection mechanism 2 further includes an image acquisition component 22, and the image acquisition component 22 includes:

[0018] An industrial camera 221, fixedly installed on the side of the tray 213, avoiding the side of the tray for receiving materials from the three-stage air separation device;

[0019] A lighting unit 222, arranged side by side with the industrial camera 221 on the side of the tray 213;

[0020] The industrial camera 221 and the lighting unit 222 are used to perform image acquisition on the materials on the tray 213 after the tray 213 completes material receiving and is reset to the acquisition position by the rotation driving assembly.

[0021] Preferably, a retaining edge 2131 is provided around the tray 213, and the retaining edge 2131 extends upward along the periphery of the tray to prevent the material from spilling laterally during the processes of the tray rotating for receiving materials, resetting, weighing or image acquisition.

[0022] Preferably, a plurality of inclined through-holes 2132 distributed in an annular array are provided on the side wall of the retaining edge 2131. The inclined through-hole group is arranged in a circumferential direction along the periphery of the tray 213, and the inclined through-holes 2132 are arranged in a radial and radiating manner along the tray 213. The axis of each through-hole starts from the inner surface of the tray 213 and extends obliquely outward.

[0023] The aperture of the through-hole group 2132 is preferably 2-5 mm, and a leak-proof grid is covered on the inner side or the outer side thereof to prevent the cut tobacco from spilling out.

[0024] Preferably, the stem removing amount detecting mechanism 2 further includes N air nozzles 217, N≥3, which are evenly distributed along the circumferential direction of the tray 213. The jetting direction of each air nozzle 217 is parallel to the axis of at least one through-hole 132 in the area covered by the air nozzle.

[0025] The controller is configured to equally divide the circumference of the tray 213 into N cleaning areas, and sequentially open and close each air nozzle 217 in a preset order to clean the soot in areas.

[0026] Preferably, the opening degree adjusting mechanism 4 includes:

[0027] A porous baffle 41, which is plugged at the air inlet 31 of the secondary air separation device 3;

[0028] A second driving device 42, the non-driving end of which is fixedly installed on the lower surface of the porous baffle 41;

[0029] A wear-resistant plate 43, one end of which is fixedly connected to the driving end of the second driving device 42, and the other end of which is attached to the hole surface of the porous baffle 41;

[0030] The second driving device 42 drives the wear-resistant plate 43 to make relative translation along the hole surface of the porous baffle 41, and adjusts the area by covering / exposing the holes to change the effective area of the pores of the porous baffle 41, so as to realize the on-line automatic adjustment of the ventilation volume of the air inlet.

[0031] Among them, the second driving device 42 is preferably an electric push rod, and its stroke is matched with the variation range of the aperture of the porous baffle 41.

[0032] Preferably, no ventilation holes are provided on the lower surface of the porous baffle 41, and a plurality of ventilation hole arrays distributed in a circumferential or radial direction are provided on the upper surface to adjust the effective ventilation area of the air inlet. An anti-blocking grid is arranged on the inner side of the hole wall of the ventilation hole.

[0033] Preferably, the opening degree adjusting mechanism 4 further includes a wind pressure sensor and a wind volume sensor. The wind pressure sensor is arranged at the air inlet in front of the porous baffle 41 for detecting the wind pressure before entering the baffle in real time. The wind volume sensor is arranged in the non-ventilation hole area behind the porous baffle 41 for measuring the air flow rate passing through the baffle and feeding it back to the controller. The controller adjusts the electric proportional valve and the opening degree adjusting mechanism according to the wind pressure and wind volume signals to achieve automatic adjustment.

[0034] Both the porous baffle 41 and the wear-resistant plate 43 are made of high-strength transparent material plates so as to directly observe the pore state through an external monitoring window or a vision sensor.

[0035] The second aspect of the present invention provides a method for controlling the control system of the cigarette stalk removal amount of the first aspect, including the following steps:

[0036] Step (1): The controller controls the rotation drive unit 214 to send the tray 213 directly below the discharge port of the three-stage air separation device 1 every 30 - 60 minutes, and after timing for 1 - 5 minutes, it resets. At the same time, the weighing sensor 212 uploads the falling material weight data in real time, and the industrial camera 221 collects the image of the falling material in the tray 213.

[0037] Step (2): The controller preprocesses the image, extracts the tobacco shred features, and calculates the proportion of the tobacco shred quality.

[0038] Step (3): According to the calculation result of step (2), adjust the electric proportional valve and / or adjust the position of the second driving device 42 to adjust the wind pressure and / or wind volume in the air separation device to the target value.

[0039] Step (4): The controller uploads the weighing data, the tobacco shred proportion data and the regulation records to the cloud server. Each cigarette machine controller serves as a slave computer and uploads the data to the cigarette machine stalk removal dynamic control system through the Internet of Things. Production management and quality personnel can timely discover the differences among each machine and each batch of wire drawing through the data removed from each machine.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. By introducing a stalk removal amount detection mechanism, an electric proportional valve, an opening degree adjusting mechanism and a control logic integrated with the MES system, the present invention realizes the dynamic closed-loop adjustment of wind pressure and wind volume, significantly reduces the dependence on manual adjustment, and effectively improves the control accuracy and response speed.

[0042] 2. With the help of the image acquisition component and the weighing detection module, the present invention samples and analyzes the materials at the discharge port regularly, can monitor the stalk content in real time, ensures that there is data support for the regulation decision in each sampling period, and improves the consistency and stability of the tobacco shred purity control.

[0043] 3. This practical controller automatically adjusts the air separation system based on the recognition results of cut tobacco images and weighing data, combined with target process parameters, effectively improving the stem removal efficiency, reducing the accidental damage and loss of cut tobacco, and ensuring the quality of cut tobacco recovery.

[0044] 4. The system structure of the present invention is clear. Key components such as porous baffles, electric push rods, rotary sampling devices, etc. are all modularly designed, which is convenient for integration with the transformation of existing cigarette machines and also facilitates later maintenance and upgrading.

[0045] 5. All detection data, control records, and adjustment instructions of the present invention can be uploaded to the cloud server and interconnected with the MES system to achieve digital recording and traceable management of the stem removal quality, which helps with the analysis of process batch differences and continuous optimization.

[0046] 6. The tray of the present invention is provided with annular inclined through holes and a directional air nozzle cleaning device, which can automatically blow and sweep dust, ensuring a clean environment for weighing and image acquisition, and improving the accuracy and stability of sampling data. In addition, the periodic scouring of the cleaning air flow helps to break the electrostatic accumulation, reduce the adsorption and deposition of cut tobacco fragments on the weighing pan or sensor surface, thereby enhancing the long-term stability of the system operation and the maintenance interval period. Description of the Drawings

[0047] Figure 1 It is a schematic structural diagram of the stem removal amount detection mechanism of the present invention in the specific embodiment, where the tray is located at the material receiving position below the discharge port of the three-stage air separation device, and the air inlet is not equipped with an opening adjustment mechanism;

[0048] Figure 2 It is a schematic structural diagram of the stem removal amount detection mechanism of the present invention in the specific embodiment, where the tray is located at the material receiving position below the discharge port of the three-stage air separation device, and the air inlet is equipped with an opening adjustment mechanism;

[0049] Figure 3 It is a schematic structural diagram of the stem removal amount detection mechanism of the present invention in the specific embodiment, where the tray is located at the image acquisition position;

[0050] Figure 4 It is a schematic structural diagram of the sampling and weighing mechanism in the specific embodiment;

[0051] Figure 5 It is a schematic structural diagram of the opening adjustment mechanism of the present invention in the specific embodiment;

[0052] Figure 6 It is a schematic structural diagram of a porous baffle in a specific real-time manner;

[0053] Reference numerals: 1, three - stage air - separation device; 2, detection mechanism for the amount of stem - label removed; 21, sampling and weighing mechanism; 211, support; 212, weighing sensor; 213, tray; 2131, edge guard; 2132, inclined through - hole; 214, rotation drive unit; 215, connecting arm; 216, first drive device; 217, air nozzle; 22, image acquisition component; 221, industrial camera; 222, lighting unit; 3, two - stage air - separation device; 31, air inlet; 4, opening degree adjustment mechanism; 41, porous baffle; 42, second drive device; 43, wear - resistant plate. Detailed implementation mode

[0054] The present application will be further described in detail below in conjunction with embodiments.

[0055] Embodiment 1

[0056] As Figure 1 , 2 shown, this embodiment provides a control system for the amount of stem - label removed in a cigarette making machine, including an MES system. The system further includes:

[0057] A detection mechanism 2 for the amount of stem - label removed, installed on one side of the discharge port of the three - stage air - separation device 1, for detecting the stem - label content in the discharged material in real time;

[0058] A feedback adjustment mechanism, including:

[0059] An electro - pneumatic proportional valve installed at the end of the three - stage air - separation air pipeline, for adjusting the air pressure and / or air volume in the air - separation device; preferably, the target value is set by the process parameter instruction provided by the MES system;

[0060] An opening degree adjustment mechanism 4 installed at the air inlet 31 of the two - stage air - separation device 3, for adjusting the opening degree of the air - separation air inlet;

[0061] A controller, communicatively connected to the detection mechanism 2 for the amount of stem - label removed and the opening degree adjustment mechanism 4, for receiving the stem - label content signal collected by the detection mechanism for the amount of stem - label removed, and adjusting the working states of the electro - pneumatic proportional valve and the opening degree adjustment mechanism based on this signal; the controller is also communicatively connected to the MES system, for uploading the removed amount data and receiving the process parameter instruction.

[0062] As Figure 3 shown, the detection mechanism 2 for the amount of stem - label removed includes:

[0063] The sampling and weighing mechanism 21 includes a bracket 211, a weighing sensor 212, a tray 213, a rotary drive unit 214, a connecting arm 215, and a first drive device 216; the rotary drive unit 214 is fixedly installed on the bracket 211, and its vertically arranged output shaft is fixedly connected to one end of the connecting arm 215, and is used to drive the connecting arm 215 to rotate around the vertical axis, so as to drive the tray 213 to switch between the material receiving position and the image acquisition position;

[0064] The connecting arm 215 extends horizontally, and the other end thereof is fixedly connected to the housing of the first drive device 216; the axis of the output shaft of the first drive device 216 is parallel to the extension direction of the connecting arm 215, and is connected to the installation section of the weighing sensor 212, and is used to drive the tray 213 to flip or reset in the vertical plane;

[0065] The bearing end of the weighing sensor 212 is connected to the tray 213.

[0066] As a preferred solution of this embodiment, the tray 213 is preferably made of a low-static and non-adhesive material (such as fluoroplastic-coated aluminum alloy), and its surface is treated with matte anti-reflection to prevent tobacco shreds from adhering and improve the image recognition contrast.

[0067] As Figure 4 As shown, the stem removal amount detection mechanism 2 further includes an image acquisition component 22, and the image acquisition component 22 includes:

[0068] An industrial camera 221, which is fixedly installed on the side of the tray 213, avoiding the side of the tray for receiving materials from the three-stage air separation device;

[0069] A lighting unit 222, which is arranged side by side with the industrial camera 221 on the side of the tray 213;

[0070] The industrial camera 221 and the lighting unit 222 are used to perform image acquisition on the materials on the tray 213 after the tray 213 completes material receiving and is reset to the acquisition position by the rotary drive assembly.

[0071] A baffle 2131 is arranged around the tray 213, and the baffle 2131 extends upward along the peripheral edge of the tray, and is used to prevent materials from spilling laterally during the processes of tray rotation for material receiving, resetting, weighing, or image acquisition.

[0072] An annular array of inclined through holes 2132 is provided on the side wall of the baffle 2131, the inclined through hole group is arranged in a circumferential direction along the peripheral edge of the tray 213, the inclined through holes 2132 are arranged radially along the radius of the tray 213, and the axis of each through hole starts from the inner surface of the tray 213 and extends obliquely outward.

[0073] Among them, in this embodiment, the aperture of the inclined through-hole 2132 is preferably 2 mm, and a leak-proof grid is covered on its inner side to prevent the tobacco shreds from overflowing. The aperture of the leak-proof grid can refer to the minimum particle size of the falling material, such as 1 mm.

[0074] The stem removal amount detection mechanism 2 further includes N air nozzles 217, where N≥3, evenly distributed circumferentially along the tray 213. The jet direction of each air nozzle 217 is parallel to the axis of at least one through-hole 132 in the area it covers; in this embodiment, the number of air nozzles 217 is preferably 4.

[0075] The corresponding controller is configured to equally divide the circumference of the tray 213 into 4 cleaning areas, and sequentially open and close each air nozzle 217 in a preset order to remove dust in areas.

[0076] As a preferred solution of this embodiment, each air nozzle 217 can be set to have a spray head with adjustable angle, and the spray direction is dynamically adjusted through a solenoid valve or a micro servo mechanism to adapt to the cleaning requirements under different stockpiling states.

[0077] As Figure 4 、 5 shown, the opening degree adjusting mechanism 4 includes:

[0078] A porous baffle 41, plugged at the air inlet 31 of the secondary air separation device 3;

[0079] A second driving device 42, the non-driving end of the driving device is fixedly installed on the lower surface of the porous baffle 41;

[0080] A wear-resistant plate 43, one end of which is fixedly connected to the driving end of the second driving device 42, and the other end is attached to the hole surface of the porous baffle 41;

[0081] The second driving device 42 drives the wear-resistant plate 43 to make a relative translation along the hole surface of the porous baffle 41, and adjusts the area by covering / exposing the holes to change the effective area of the pores of the porous baffle 41, so as to realize the on-line automatic adjustment of the air ventilation volume of the air inlet.

[0082] Among them, the second driving device 42 is preferably an electric push rod, and its stroke matches the change range of the aperture of the porous baffle 41.

[0083] The lower surface of the porous baffle 41 is not provided with ventilation holes, and a plurality of ventilation hole arrays distributed circumferentially or radially are arranged on the upper surface to adjust the effective ventilation area of the air inlet, and an anti-blocking grid is arranged on the inner side of the hole wall of the ventilation hole.

[0084] The opening adjustment mechanism 4 further includes a wind pressure sensor and a wind volume sensor. The wind pressure sensor is arranged at the air inlet in front of the porous baffle 41 for real-time detection of the wind pressure before entering the baffle. The wind volume sensor is arranged in the non-ventilation hole area behind the porous baffle 41 for measuring the air flow rate passing through the baffle and feeding it back to the controller. The controller adjusts the electro-hydraulic proportional valve and the opening adjustment mechanism according to the wind pressure and wind volume signals to achieve automatic adjustment.

[0085] Both the porous baffle 41 and the wear-resistant plate 43 are made of high-strength transparent material plates, so as to directly observe the pore state through an external monitoring window or a vision sensor.

[0086] At the edge of the contact area between the wear-resistant plate 43 and the porous baffle 41, an elastic scraping strip or a sealing sliding sheet structure is arranged along its relative sliding direction for dynamically sealing the sliding gap during the movement of the wear-resistant plate, ensuring the sealing performance during the opening and closing process and preventing dust from entering the sliding gap and causing jamming.

[0087] As a preferred solution of the present invention, the sampling and weighing mechanism 21, the air nozzle 217, and the image acquisition component 22 can be set as a quick disassembly and assembly module structure, which is convenient for cleaning, maintenance or replacement, improving the maintenance efficiency and on-site stability.

[0088] Specifically, the controller is communicatively connected to at least the rotary drive unit 214, the first drive device 216, the weighing sensor 212, the industrial camera 221, the air nozzle 217, the second drive device 42, the wind pressure sensor, and the wind volume sensor.

[0089] Embodiment 2

[0090] This embodiment provides a method for controlling the rejection amount of stem pieces in the control system described in Embodiment 1, including the following steps:

[0091] Step (1): The controller controls the rotary drive unit 214 to send the tray 213 directly below the discharge port of the three-stage air separation device 1 every 30 minutes. After waiting for 1 minute to ensure sufficient material receiving, the rotary drive unit 214 rotates the tray 213 back to the image acquisition position. At the same time, the weighing sensor 212 uploads the falling material weight data in real time, and the industrial camera 221 acquires the image of the falling material in the tray 213. The weighing starts to be collected after the material is stable.

[0092] Step (2): The controller preprocesses the image, extracts the tobacco shred features, and calculates the proportion of the tobacco shred quality. Preferably, an image segmentation method based on edge feature extraction and gray difference is used to extract the tobacco shred and stem piece feature regions and calculate the proportion of the tobacco shred quality.

[0093] Step (3): According to the calculation result in step (2), the controller outputs a control signal to adjust the opening degree of the electro-hydraulic proportional valve, thereby adjusting the negative pressure value in the air circuit of the three-stage air separation device, and / or adjusting the position of the second driving device 42 to adjust the air pressure and / or air volume in the air separation device to the target value. For example, the following control logic can be adopted:

[0094] The first control logic: If the proportion of cut tobacco in the material falling on the tray 213 is ≥2% and the weight of the falling material is within the set range, the controller adjusts the pressure of the electro-hydraulic proportional valve to increase at a rate of 0.1 MPa every 5 seconds until the proportion of cut tobacco <2% or the pressure reaches the upper limit of -0.5 MPa;

[0095] The second control logic: If the weight of the material falling on the tray 213 exceeds the limit and the proportion of cut tobacco <2%, the controller moves the wear-resistant plate 43 upward on the second driving device 42 and adjusts the opening area of the baffle at the secondary air separation air inlet to decrease by 10%-15% each time;

[0096] The third control logic: If the change rate of the cigarette draw resistance feedback by the MES system >5% or the weight deviation from the standard >0.05 g, the controller dynamically adjusts the critical value of the reject amount of the stem to the lower limit allowed by the process and shortens the detection interval to 5±1 minutes;

[0097] Step (4): The controller uploads the weighing data, the proportion data of cut tobacco and the control records to the cloud server. Each cigarette machine controller acts as a slave computer and uploads the data to the dynamic control system for rejecting stem and stub of cigarette machine through the Internet of Things. Production management and quality personnel can timely discover the differences between each machine and each batch of cut tobacco production, as well as trend analysis, quality traceability and process adjustment, etc. through the data rejected by each machine.

[0098] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present application rather than to limit them. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and details without departing from the scope defined by the claims of the present application; the dimensions in the drawings and embodiments have nothing to do with the specific physical objects and are not used to limit the protection scope of the present application. The physical dimensions can be selected and changed according to actual needs.

Claims

1. A control system for the amount of stem removal in a cigarette making machine, including an MES system, characterized in that, The system further includes: A stem removal amount detection mechanism (2) installed on one side of the discharge port of the three-stage air separation device (1) for real-time detection of the stem content in the discharged material; A feedback adjustment mechanism, including: An electro-pneumatic proportional valve installed at the end of the three-stage air separation air pipeline for adjusting the air pressure and / or air volume in the air separation device; An opening adjustment mechanism (4) installed at the air inlet (3) of the second-stage air separation device (3) for adjusting the opening degree of the air separation air inlet; A controller, communicatively connected to the stem removal amount detection mechanism (2) and the opening adjustment mechanism (4), for receiving the stem content signal collected by the stem removal amount detection mechanism and adjusting the working states of the electro-pneumatic proportional valve and the opening adjustment mechanism based on this signal; the controller is also communicatively connected to the MES system for uploading the removal amount data and receiving process parameter instructions.

2. A control system for the stem removal amount of a cigarette making machine according to claim 1, wherein The stem removal amount detection mechanism (2) includes: A sampling and weighing mechanism (21), including a bracket (211), a weighing sensor (212), a tray (213), a rotation drive unit (214), a connecting arm (215) and a first drive device (216); the rotation drive unit (214) is fixedly installed on the bracket (211), and its vertically arranged output shaft is fixedly connected to one end of the connecting arm (215) for driving the connecting arm (215) to rotate around the vertical axis, thereby driving the tray (213) to switch between the material receiving position and the image acquisition position; The connecting arm (215) extends horizontally, and the other end thereof is fixedly connected to the housing of the first drive device (216); The axis of the output shaft of the first drive device (216) is parallel to the extension direction of the connecting arm (215) and is connected to the installation section of the weighing sensor (212) for driving the tray (213) to flip or reset in the vertical plane; The bearing end of the weighing sensor (212) is connected to the tray (213).

3. The control system for the reject quantity of cigarette stems in a cigarette making machine according to claim 1, characterized in that, The stem removal amount detection mechanism (2) further includes an image acquisition component (22), and the image acquisition component (22) includes: An industrial camera (221) fixedly installed on the side of the tray (213), avoiding the side of the tray for receiving materials from the three-stage air separation device; A lighting unit (222) arranged in cooperation with the industrial camera (221) on the side of the tray (213); The industrial camera (221) and the lighting unit (222) are used to perform image acquisition on the materials on the tray (213) after the tray (213) completes material receiving and is reset to the acquisition position by the rotation drive assembly.

4. A control system for the amount of stem removal in a cigarette making machine according to claim 1, characterized in that, The tray (213) is provided with a baffle (2131) around its perimeter, and the baffle (2131) extends upward along the perimeter of the tray to prevent materials from spilling laterally during the processes of tray rotation for material receiving, resetting, weighing or image acquisition.

5. A control system for the amount of stem removal in a cigarette making machine according to claim 4, characterized in that, An annular array of inclined through-holes (2132) is provided on the side wall of the retaining edge (2131). The group of inclined through-holes is arranged circumferentially along the periphery of the tray (213). The inclined through-holes (2132) are arranged radially in a radial direction of the tray (213). The axis of each through-hole starts from the inner surface of the tray (213) and extends obliquely outwards.

6. The control system for the reject quantity of cigarette stems in a cigarette making machine according to claim 4, characterized in that, The stem removal amount detection mechanism (2) further includes N air nozzles (217), where N≥3, which are evenly distributed circumferentially along the tray (213). The jet direction of each air nozzle (217) is parallel to the axis of at least one through-hole (132) in the area it covers; The controller is configured to equally divide the circumference of the tray (213) into N cleaning areas, and sequentially open and close each air nozzle (217) in a preset order to remove soot in a divided area.

7. A control system for the amount of stem removal in a cigarette making machine according to claim 1, characterized in that, The opening degree adjustment mechanism (4) includes: A porous baffle (41) that seals the air inlet (3) of the secondary air separation device (3); A second driving device (42), the non-driving end of the driving device is fixedly installed on the lower surface of the porous baffle (41); A wear-resistant plate (43), one end of which is fixedly connected to the driving end of the second driving device (42), and the other end is attached to the hole surface of the porous baffle (41); The second driving device (42) drives the wear-resistant plate (43) to make a relative translation along the hole surface of the porous baffle (41), and adjusts the area by covering / exposing the holes to change the effective area of the pores of the porous baffle (41), so as to realize the on-line automatic adjustment of the ventilation volume of the air inlet.

8. A control system for the amount of stem removal in a cigarette making machine according to claim 4, characterized in that, No ventilation holes are provided on the lower surface of the porous baffle (41), and a plurality of ventilation hole arrays distributed circumferentially or radially are provided on the upper surface to adjust the effective ventilation area of the air inlet.

9. A control system for the amount of stem and tag rejection in a cigarette making machine according to claim 4, characterized in that, The opening degree adjustment mechanism (4) further includes a wind pressure sensor and a wind volume sensor. The wind pressure sensor is arranged at the air inlet in front of the porous baffle (41) for real-time detection of the wind pressure before entering the baffle; the wind volume sensor is arranged in the non-ventilation hole area behind the porous baffle (41) for measuring the air flow rate after passing through the baffle and feeding it back to the controller. The controller adjusts the electric proportional valve and the opening degree adjustment mechanism according to the wind pressure and wind volume signals to achieve automatic adjustment.

10. A control method using the cigarette making machine stem removing amount control system described in claim 1, characterized in that, It includes the following steps: Step (1), the controller controls the rotation drive unit (214) to send the tray (213) directly below the discharge port of the tertiary air separation device (1) every 30 - 60 minutes, and after timing for 1 - 5 minutes, it resets. At the same time, the weighing sensor (212) uploads the blanking weight data in real time, and the industrial camera (221) collects the image of the blanking in the tray (213); Step (2), the controller preprocesses the image, extracts the cut tobacco features, and calculates the cut tobacco mass ratio; Step (3), according to the calculation result of step (2), adjust the electric proportional valve, and / or adjust the position of the second driving device (42) to adjust the wind pressure and / or wind volume in the air separation device to the target value; Step (4): The controller uploads the weighing data, cut tobacco proportion data and regulation records to the cloud server. Each cigarette machine controller, as a slave computer, uploads the data to the dynamic control system for removing stems and tags of cigarette machines through the Internet of Things. Production management and quality personnel can timely discover the differences among each machine and each batch of cut tobacco production by the data removed from each machine.

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