A vibration type rotating load cigarette tobacco compactness detection device

Abstract

The application provides a vibration type rotating object-carrying cigarette tightness detection device, and belongs to the technical field of tobacco product quality detection. The device comprises a machine box, an object-carrying turntable, a detection unit, a vibration unit and a turntable driving unit. A plurality of cigarette detection stations are arranged on the object-carrying turntable, a plurality of cigarette positioning holes are arranged on the object-carrying turntable, and a tooth shape is arranged on the outer periphery. The vibration unit comprises a fixed support, a pull rod air cylinder, a flange plate, an annular damping pad, a connecting shaft and a first coupling. The pull rod passes through the flange plate and the annular damping pad and is rotationally connected with the object-carrying turntable. The turntable driving unit comprises a power gear and a transition gear. The transition gear is extended and meshed with the power gear and the tooth shape of the object-carrying turntable under the action of a switching air cylinder. The detection unit comprises a cantilever beam support and a laser displacement sensor. The height of the cigarette in each cigarette positioning hole is detected after the object-carrying turntable rotates. The device can simulate manual tapping of the cigarette, and the height data of the cigarette before and after tapping is collected to analyze the tightness of the tobacco.

Description

Technical Field

[0001] This invention relates to the field of tobacco product quality testing technology, and in particular to a device for testing the compactness of tobacco shreds in a vibrating rotating carrier. Background Technology

[0002] During cigarette consumption, consumers, due to smoking habits or sensory needs, will tap the cigarette with the filter end facing down and the lit end facing up before lighting it. This causes the tobacco to sink a certain distance into the cigarette paper, altering the density and hardness of the tobacco portion, as well as the overall draw resistance and ventilation rate. Furthermore, the depth to which the tobacco sinks into the cigarette paper significantly influences the consumer's perception of the cigarette's quality. A tapped cigarette also exhibits noticeable differences in taste compared to a regular cigarette.

[0003] To quantitatively characterize consumer experience in evaluating cigarette quality indicators, this study investigates and designs a vibration-based cigarette compaction detection device using simulated tapping and non-destructive testing. The device uses tobacco compaction as the evaluation index, and the distance the tobacco shreds sink into the cigarette paper before and after tapping is collected as data. Accurate detection of tobacco compaction is not only crucial for protecting consumer interests and meeting diverse consumer demands for product characteristics, but also serves as a driving force for cigarette manufacturers to improve their production processes and enhance product quality.

[0004] Utility model patent CN205506022U discloses a cigarette tobacco compaction device. This device addresses the need to eliminate exposed tobacco during laboratory cigarette length measurement by using a mechanical system to simplify the manual tobacco compaction process. The device includes a support, guide rail, electromagnet, and permanent magnet. During operation, the cigarette to be compacted is placed on the support. When the electromagnet is energized, it and the permanent magnet work together to pull the support upwards to a predetermined height. After the power is de-energized, the cigarette gains velocity during free fall and comes to a stop on the platform, thus compacting the tobacco. However, this method merely mechanically transforms the traditional manual tobacco compaction method. The energy source is mainly the conversion of gravitational potential energy and kinetic energy, aiming to improve the original manual tobacco compaction method for cigarette length measurement. However, the structure is relatively simple and lacks automation. It does not address quantitative detection before and after tobacco compaction, nor does it consider the work done by the hand holding the cigarette vertically during manual compaction.

[0005] Utility model patent CN205597098U discloses a cigarette tobacco sorting device. This device comprises a cigarette inlet, a blower, an air inlet, and a baffle. It uses airflow to accelerate the cigarette to be sorted, with the filter end facing down and the tobacco end facing up, and stops the moving cigarette at the end of its journey to compact the tobacco, thus solving the problem of errors in cigarette length measurement caused by the tobacco end protruding from the cigarette paper. Although this patent achieves speed supplementation of the cigarette with additional airflow energy, the high-speed airflow at the initial entry and exit points of the cigarette channel can affect the overall density distribution of the tobacco due to air pressure differences, potentially causing wind-blown loss of tobacco quality. Furthermore, it lacks the function of quantitatively detecting the distance the tobacco falls from the cigarette paper end, and it does not involve detailed detection and analysis of the tobacco compaction before and after the cigarette is compacted.

[0006] In view of the above reasons, the present invention proposes a device for detecting the compactness of cigarette tobacco shreds by a vibrating rotating carrier, so as to achieve accurate detection of the compactness of cigarette tobacco shreds. Summary of the Invention

[0007] The purpose of this invention is to provide a vibrating rotating carrier for detecting the compactness of cigarette tobacco. This device can simulate the manual tapping action of a person on a cigarette and collect data such as the height of the cigarette before and after tapping, and quantitatively detect and analyze the compactness of the cigarette tobacco before and after tapping.

[0008] This invention provides a vibrating rotating carrier for detecting the compactness of cigarette tobacco, comprising: a housing, wherein a carrier turntable, a detection unit, a vibration unit, and a turntable drive unit are disposed within the housing; the carrier turntable is rotatably disposed on top of the vibration unit; multiple cigarette detection stations are evenly arranged on the top of the carrier turntable from its center to its inner circumferential surface in a radial direction; each cigarette detection station has multiple cigarette positioning holes; a continuous ring of teeth is provided on the outer circumferential surface of the carrier turntable; the vibration unit includes a fixed bracket, a pull rod cylinder, a flange, an annular damping pad, a connecting shaft, and a first coupling connected sequentially from bottom to top; the pull rod of the pull rod cylinder passes through the flange and the annular damping pad, and is rotatably connected to the bottom of the carrier turntable through the connecting shaft and the first coupling; the turntable drive unit... The unit includes a power gear and a transition gear. The power gear is horizontally arranged and at the same height as the teeth on the outer periphery of the turntable. The power gear is mounted on the inner wall of the chassis via a stepped shaft and an upper bracket. The transition gear is fixedly connected to the inner wall of the chassis via a rectangular bracket and a switching cylinder. When the transition gear extends under the action of the switching cylinder, it can simultaneously mesh with the teeth on both the power gear and the outer periphery of the turntable. The detection unit is located above the turntable. The detection unit includes a cantilever beam bracket fixed to the inner wall of the chassis and a set of laser displacement sensors installed at the bottom of the cantilever beam bracket. Each laser displacement sensor can be positioned directly above the cigarette positioning hole in any of the cigarette detection stations after the turntable rotates, and can detect the height of the cigarettes inside.

[0009] Preferably, the number of laser displacement sensors is not less than the number of cigarette positioning holes opened at any of the cigarette detection stations.

[0010] Preferably, there are 5 cigarette detection stations arranged in a pentagonal star shape along the radial direction of the turntable, and each cigarette detection station has 4 cigarette positioning holes.

[0011] Preferably, a buffer spring and a pressure cover are installed inside the flange. The pull rod of the pull rod cylinder passes through the buffer spring, the pressure cover and the annular damping pad in sequence, and is fixedly connected to the connecting shaft. The connecting shaft is rotatably connected to the connecting cover plate and roller bearing at the bottom of the load turntable through the first coupling. The top of the cylinder body of the pull rod cylinder is provided with an upper support frame fixedly connected to it. The two sides of the upper support frame are fixedly connected to the bottom of the chassis through support components.

[0012] Preferably, the bottom of the turntable is provided with an air chamber, and the middle of the turntable is provided with a quick plug for connecting to an external air source. Each cigarette positioning hole is connected to the air chamber, and the bottom of each cigarette positioning hole is provided with a rubber sleeve that fixes the cigarette filter under the action of the air chamber. The charging and discharging of the lever cylinder, the switching cylinder and the air chamber are controlled by a valve island installed on the inner wall of the chassis. The upper and lower air passage interfaces of the lever cylinder and the switching cylinder are respectively equipped with speed regulating valves, and the speed regulating valves are connected to an external positive pressure air source.

[0013] Preferably, a keyway is provided on the stepped shaft, and the center of the power gear is connected to the keyway on the stepped shaft via a mating key. The upper end of the stepped shaft is rotatably connected to the upper bracket via a bearing, and the lower end of the stepped shaft is connected to the stepper motor via a second coupling. The upper end of the stepper motor is connected to the lower bracket, and the lower bracket is fixed to the inner side wall of the chassis. The lower end of the stepper motor is fixed to the inner support column at the bottom of the chassis via a damping buffer pad.

[0014] Preferably, the transition gear is rotatably connected to the rectangular bracket via bearings and a mounting shaft. The mounting shaft is equipped with spherical bearings at both ends, allowing it to move linearly along the upper and lower guide rails. Under the auxiliary guiding effect of the upper and lower guide rails and the extension and retraction action of the switching cylinder, the transition gear engages and disengages with the outer circumferential teeth of the power gear and the cargo turntable. The base of the switching cylinder is fixed to the inner wall of the chassis via a damping buffer pad.

[0015] Preferably, the top of the chassis is provided with a rotatable upper cover plate, which is connected to the inner side wall of the chassis via hinges and gas struts. The front side of the chassis is provided with a rotatable front door, and both the upper cover plate and the front door are equipped with safety interlocking devices.

[0016] Preferably, a touch-screen all-in-one computer, an external data transmission interface, and a power switch are installed on the side of the chassis, and a heat dissipation box is also installed on the side wall of the chassis.

[0017] Preferably, the flange is equipped with a receiving end of a speed detector, and the bottom of the cargo turntable is fixed with an marking end of the speed detector.

[0018] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: 1. The mechanism simulates the manual tapping action of a person on a cigarette by using a structure such as a pull rod cylinder, flange, annular damping pad, and a rotating platform. Multiple cigarette detection stations are set on the surface of the rotating platform, and each detection station has multiple cigarette positioning holes. The rotating platform is driven to rotate by a power gear, a transition gear, and a toothed gear set on the outer circumference of the platform. A set of laser displacement sensors collects data such as the height of cigarettes at different detection stations before and after tapping, and quantitatively detects the tobacco compactness of a batch of cigarettes before and after tapping. 2. The drive gear and transition gear can mesh with the teeth on the outer circumference of the turntable to make the turntable rotate. The transition gear is set so that it disengages from the teeth on the outer circumference of the turntable when the pull rod cylinder drives the turntable to vibrate up and down to simulate knocking. This allows the turntable to move up and down under the action of the pull rod cylinder to simulate knocking. After knocking, the transition gear extends and rotates a certain cigarette detection station to be directly below the detection unit. Multiple laser displacement sensors simultaneously measure the height of the cigarettes in the positioning holes of each cigarette at a certain cigarette detection station, thereby realizing the simultaneous measurement of the tobacco tightness of multiple cigarettes and improving detection efficiency. 3. By using the pull rod cylinder, flange, and annular damping pad, the speed of upward and downward movement can be controlled. The speed of the load turntable at the downward stroke cutoff position can be the same as the instantaneous speed when a person naturally taps the cigarette filter tip. This allows for the adjustment and setting of various parameters of the drive, elasticity, damping, and speed detection devices, thus achieving accurate simulation of the tapping action. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the tobacco compactness detection device of the present invention; Figure 2 This is a front view schematic diagram of the detection device of the present invention (after removing the top cover and the side wall of the chassis); Figure 3 This is a top view of the detection device of the present invention (after removing the top cover); Figure 4 This is an isometric view of the connection relationship between the internal power components of the detection device of the present invention; Figure 5 This is a graph showing the data curve of the number of knocks and the indentation distance measured by the detection device of the present invention.

[0021] Explanation of reference numerals in the attached figures: 1: Chassis; 2: Loading turntable; 201: Cigarette positioning hole; 202: Tooth profile; 203: Connecting cover plate; 3: Fixed bracket; 4: Pull rod cylinder; 5: Flange; 6: Annular damping pad; 7: Connecting shaft; 8: First coupling; 9: Power gear; 10: Transition gear; 11: Stepped shaft; 12: Upper bracket; 13: Rectangular bracket; 14: Switching cylinder; 15: Cantilever beam bracket; 16: Laser displacement sensor; 17: Quick connector; 18: 19: Upper support frame; 20: Support assembly; 21: Second coupling; 22: Stepper motor; 23: Lower bracket; 24: Damping buffer pad; 25: Inner support column; 26: Mounting shaft; 27: Upper guide rail; 28: Lower guide rail; 29: Speed ​​control valve; 30: Upper cover plate; 31: Hinge; 32: Gas strut; 33: Front door; 34: Safety interlock device; 35: Touch screen all-in-one computer; 36: External data transmission interface; 37: Power switch; 38: Valve island. Detailed Implementation

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] like Figure 1-4 As shown, this invention proposes a vibrating rotating carrier for detecting the compactness of cigarette tobacco, comprising: a housing 1, wherein a carrier turntable 2, a detection unit, a vibration unit, and a turntable drive unit are disposed within the housing 1. The carrier turntable 2 is rotatably disposed on top of the vibration unit. The carrier turntable 2 is in the shape of a stepped frustum. Multiple cigarette detection stations are evenly arranged on the top of the carrier turntable 2 in the radial direction from its center to its inner circumference. Each cigarette detection station has multiple evenly spaced cigarette positioning holes 201. A continuous toothed pattern 202 is provided on the bottom outer circumference of the turntable 2. A rubber sleeve is provided at the bottom of the cigarette positioning hole 201, and the cigarette positioning hole 201 is connected to the air chamber at the bottom of the turntable 2. The air chamber is connected to an external air source through the valve island 37. When the air chamber is pressurized by the valve island 37 to create a positive pressure difference with atmospheric pressure, the rubber sleeve at the bottom of the cigarette positioning hole 201 will be recessed, clamping and positioning the filter end of the cigarette. The cigarette can then vibrate up and down or move in a circle with the turntable 2.

[0026] The vibration unit includes a fixed bracket 3, a tie rod cylinder 4, a flange 5, an annular damping pad 6, a connecting shaft 7, and a first coupling 8 connected sequentially from bottom to top. The tie rod of the tie rod cylinder 4 passes through the flange 5 and the annular damping pad 6, and is rotatably connected to the bottom of the turntable 2 via the connecting shaft 7 and the first coupling 8. The bottom of the turntable 2 is provided with a connecting cover plate 203 and a roller bearing located at its center. The first coupling 8 is fixedly connected to the roller bearing via a snap ring, so that the entire turntable 2 can perform circular motion relative to the tie rod cylinder 4. The tie rod cylinder 4 can drive the entire turntable 2 to move up and down, thereby simulating the action of manual tapping.

[0027] The turntable drive unit includes a power gear 9 and a transition gear 10. The power gear 9 is horizontally arranged inside the housing 1 and is at the same height as the tooth profile 202 on the outer periphery of the load turntable 2, but the power gear 9 does not mesh with the tooth profile on the outer periphery of the load turntable 2. The power gear 9 is mounted on the inner wall of the housing 1 via a stepped shaft 11 and an upper bracket 12. The transition gear 10 is fixedly connected to the inner wall of the housing 1 via a rectangular bracket 13 and a switching cylinder 14. After the transition gear 10 extends under the action of the switching cylinder 14, it can simultaneously mesh with the power gear 9 and the tooth profile on the outer periphery of the load turntable 2 for transmission. When the vibration unit drives the load turntable 2, the transition gear 10 can simultaneously mesh with the tooth profile on the outer periphery of the load turntable 2. Before and during the simulated knocking action, the transition gear 10 retracts and does not mesh with the power gear 9 or the toothed surface 202 on the outer periphery of the load-carrying turntable 2, so as to avoid affecting the up-and-down movement of the load-carrying turntable 2 with the pull rod cylinder 4. After the simulated knocking action is completed, the transition gear 10 extends under the action of the switching cylinder 14 and meshes with the power gear 9 and the toothed surface 202 on the outer periphery of the load-carrying turntable 2. The power gear 9 drives the transition gear 10 and the load-carrying turntable 2 to rotate, so that the different cigarette detection positions rotate to the bottom of the detection unit to detect the height of the cigarettes in each cigarette positioning hole 201.

[0028] The detection unit is located above the turntable 2. The detection unit includes a cantilever beam bracket 15 fixed to the inner wall of the housing 1 and a set of laser displacement sensors 16 installed at the bottom of the cantilever beam bracket 15. The number of laser displacement sensors 16 is not less than the number of cigarette positioning holes 201 opened at any cigarette detection station. Each laser displacement sensor 16 can be located directly above each cigarette positioning hole 201 in any cigarette detection station after the turntable 2 rotates, and detect the height of the cigarette inside.

[0029] In this embodiment, the rotating disk 2 is shaped like a stepped frustum, with the largest diameter at the bottom. Teeth 202 are evenly and continuously distributed on the outer circumference of its bottom, and these teeth 202 are straight. The center of the rotating disk 2 is a hollow air chamber. The upper part of the rotating disk 2 has a smaller diameter than the middle part and is a hollow ring. Inside this ring are ribs evenly distributed in a pentagonal star shape along the radial direction of the rotating disk 2, serving as cigarette detection stations. Each cigarette detection station is integrally connected near the center of the ring. There are five cigarette detection stations, and each station holds a cigarette. There are four positioning holes 201, and four laser displacement sensors 16 at the bottom of the cantilever beam support 15. The depth of the positioning holes 201 is slightly less than the height of the cigarette. The bottom of each positioning hole is connected to the air chamber. Each cigarette detection station is equipped with a quick plug 17 near the center of the ring to connect to an external positive pressure air source. Positive pressure air source can be introduced into the air chamber through the quick plug 17. Under the pressure difference between the positive pressure air source and atmospheric pressure, the rubber sleeve at the bottom of the positioning hole 201 is recessed to clamp the filter of the cigarette.

[0030] In this embodiment, a buffer spring and a pressure cover are installed inside the flange 5. The pull rod of the pull rod cylinder 4 passes through the buffer spring, the pressure cover and the annular damping pad 6 in sequence, and is fixedly connected to the connecting shaft 7. The connecting shaft 7 is rotatably connected to the roller bearing at the center of the connecting cover plate 203 installed at the bottom of the loading turntable 2 through the first coupling 8. The top of the cylinder body of the pull rod cylinder 4 is provided with an upper support frame 18 fixedly connected to it. The two sides of the upper support frame 18 are fixedly connected to the bottom of the chassis 1 through the support components 19 respectively. The upper support frame 18 can support the flange 5 and ensure that the pull rod of the pull rod cylinder 4 moves vertically up and down.

[0031] In this embodiment, a keyway is provided on the stepped shaft 11. The center of the power gear 9 is connected to the keyway on the stepped shaft 11. The upper end of the stepped shaft 11 is rotatably connected to the upper bracket 12 through a bearing. The lower end of the stepped shaft 11 is connected to the stepper motor 21 through a second coupling 20. The upper end cover of the stepper motor 21 is connected to the lower bracket 22. The lower bracket 22 is fixed on the inner side wall of the housing 1. The lower end of the stepper motor 21 is fixed to the inner support column 24 at the bottom of the housing 1 through a damping buffer pad 23. The stepper motor 21 can drive the power gear 9 to rotate in an indexing manner, and then drive the load turntable 2 to rotate 72° each time through the transition gear 10, so that the five cigarette detection stations are located below the detection unit. The height of the cigarette in each cigarette positioning hole 201 is detected by each laser displacement sensor 16.

[0032] In this embodiment, the transition gear 10 is rotatably connected to the rectangular bracket 13 via bearings and mounting shaft 25. The two ends of the mounting shaft 25 are equipped with spherical bearings that can move linearly along the upper guide rail 26 and the lower guide rail 27, thereby causing the filter gear 10 to move up and down and disengage from the meshing state with the power gear 9 and the outer peripheral tooth profile 202 of the load turntable 2. Under the auxiliary guiding effect of the upper guide rail 26 and the lower guide rail 27 and the extension and retraction effect of the switching cylinder 14, the transition gear 10 achieves meshing and disengagement with the power gear 9 and the outer peripheral tooth profile 202 of the load turntable 2. The base of the switching cylinder 14 is fixed to the inner side wall of the housing 1 via a damping buffer pad 23.

[0033] In this embodiment, the charging and discharging of the lever cylinder 4, the switching cylinder 14, and the air chamber are controlled by the valve island 37 installed on the inner wall of the housing 1. The upper and lower air passage interfaces of the lever cylinder 4 and the switching cylinder 14 are respectively equipped with speed regulating valves 28. The speed regulating valves 28 are connected to a positive pressure air source with a pressure of 0 to 6 atmospheres. The charging and discharging of the lever cylinder 4, the switching cylinder 14, and the air chamber are all controlled by the valve island 37. The charging and discharging speed of the lever cylinder 4 and the switching cylinder 14 can be controlled by the speed regulating valves 28, thereby adjusting their extension and retraction speeds.

[0034] In this embodiment, a receiving end of a speed detector is installed on the flange 5, and a marking end of the speed detector is fixed on the bottom of the cargo turntable 2. The maximum speed of the pull rod cylinder 4 and the cargo turntable 2 at the vibration downward movement cutoff position can be used to adjust the cylinder movement state accordingly.

[0035] In this embodiment, the top of the chassis 1 is provided with a rotatable upper cover 29. The upper cover 29 is connected to the inner side wall of the chassis 1 via a hinge 30 and a gas strut 31. The front side of the chassis 1 is provided with a rotatable front door 32. Both the upper cover 29 and the front door 32 are equipped with safety interlocking devices 33, which can interlock the various components inside the chassis 1 with the upper cover 29 and the front door 32. A position sensor is installed on the upper support frame 18, which can be aligned with the edge of the outermost cigarette positioning hole 201 of the turntable 2 for measuring the zero-position calibration before and after.

[0036] In this embodiment, a touch screen all-in-one computer 34, an external data transmission interface 35, and a power switch 36 are installed on the side of the chassis 1. The touch screen all-in-one computer 34 can send instructions to the valve island 37 to control the action of pneumatic components such as the lever cylinder 4, the switching cylinder 14, the speed control valve 28, and the air chamber, thereby realizing the up-and-down vibration of the load turntable 2 to simulate knocking and the rotation to different work positions after knocking for the detection steps. In addition, a heat dissipation box for heat dissipation inside the chassis 1 is also installed on the side wall of the chassis 1.

[0037] The specific method for detecting the compactness of tobacco shreds in cigarettes using the device of the present invention is as follows: When using the device, ensure that the power switch 36 and the gas source are in the open position. First, open the top cover 29 of the chassis 1, which is supported by the gas strut 31. The safety interlock device 33 on the cover is in the open position. The touch screen all-in-one computer 34 is in normal standby mode. Manually insert a total of 20 cigarettes into the cigarette positioning holes 201 of the turntable 2, ensuring that the filter end is at the bottom and the lit end is at the top. Then close the top cover 29. After clicking "Sample Placed", the touch screen all-in-one computer 34 sends the command to the valve island 37. After positive pressure gas is introduced into the air chamber of the turntable 2 through the external air passage via the quick plug 17, when the air chamber is filled with pressurized gas, a pressure difference is formed with atmospheric pressure, causing the rubber sleeve to indent inward, thereby clamping and positioning the filter end of the inserted cigarette.

[0038] In addition, the valve island 37 controls the pneumatic actuators such as the lever cylinder 4, the switching cylinder 14, and the air chamber of the load turntable 2 according to three different stages: before the test, during the test, and after the test. After clicking "Start Test," the switching cylinder 14 extends, engaging the transition gear 10 with the power gear 9 and the outer tooth profile 202 of the carrying turntable 2. Under the action of the stepper motor 21, the carrying turntable 2 rotates and performs initialization verification. Then, the power gear 9 begins indexing rotation, rotating 72° each time, sequentially measuring the tobacco height of the cigarettes in the positioning holes 201 at the five cigarette detection stations before tapping. Then, the power gear 9 stops rotating, and the transition gear 10 remains stationary in the switching cylinder 14. The transition gear 10 moves up or down between the upper guide rail 26 and the lower guide rail 27, disengaging from the power gear 9 and the carrying turntable 2. Then, it retracts under the action of the switching cylinder 14. The touchscreen all-in-one computer 34 then displays that the tapping stage is about to begin. The valve island 37 controls the pull rod cylinder 4 to adjust the instantaneous speed at the end of the lower stroke of the carrying turntable 2. With the recognition and cooperation of the speed sensor, the touch screen all-in-one computer 34 controls the speed and force of each tap, controls the number of taps, and records data. Under the joint control of the touch screen all-in-one computer 34 and the valve island 37, the pull rod cylinder 4 begins to vibrate up and down in the vertical direction, driving the load turntable 2 to move up and down, simulating the manual tapping action on the cigarette. After the tapping is completed, the switching cylinder 14 drives the transition gear 10 to extend and move up or down between the upper guide rail 26 and the lower guide rail 27, thereby making the transition gear 10 mesh with the power gear 9 and the outer peripheral tooth profile 202 of the load turntable 2. Under the action of the stepper motor 21, the power gear 9 begins to rotate in increments of 72° each time, and begins to measure the height of the tobacco in the cigarette positioning hole 201 at the 5 cigarette detection stations before tapping, for a total of 5 intermittent rotation measurements to collect data. The movement of the pull rod cylinder 4 is jointly controlled and acted upon by the speed regulating valve 28, the valve island 37, the speed sensor, the damping spring, and the annular damping pad 6. Visually, the acceleration and speed are slower when moving upwards, and faster when moving downwards. The speed of the rotating platform 2 at the end of its downward stroke is the same as the instantaneous speed at which a person naturally taps the end of a cigarette filter. This information is used to adjust and set the parameters of the drive, elasticity, damping, and speed detector. After the device has completed the set number of taps and speed, the touchscreen all-in-one computer 34 displays the measurement after the tapping began, and the rotating platform 2 returns to its height at the measurement position.

[0039] At this point, data collection for all cigarettes before and after the tapping has been completed. The touchscreen all-in-one computer 34 stores and analyzes the falling height of the tobacco and the compactness of the tobacco. The number and frequency of tapping groups are set, and the full-cycle tapping test process for each batch of 20 cigarettes is completed. Finally, the top cover 29 is opened to remove the measured cigarettes, ending the test. Data analysis output shows that after the nth tapping, the tobacco falling distance is a fixed value h. After the next n+i taps (i=n+1, n+2…), the tobacco falling distance is less than 0.01mm. The compactness of the tobacco in the cigarette is defined as… a =h / n, which means the distance the tobacco falls per unit number of taps is the density of the tobacco in the cigarette. The smaller the value, the better the density of the cigarette.

[0040] The direct measurement value of this invention is the height of the tobacco shreds in the cigarette before and after tapping. The density change of the tobacco-containing segment in the cigarette characterizes the compactness of the tobacco shreds. Based on the law of conservation of energy, when a person manually taps a cigarette, the work done is W1 from the force F applied by the hand and the distance S it travels in the direction of motion, and E1 from the gravitational potential energy due to its own weight mg falling from a certain height H to the cutoff position. The mass of the cigarette is m, and the acceleration due to gravity is g. The kinetic potential energy when the cigarette moves downward to its maximum speed v is E2. After the cutoff motion, the energy is converted into the work done by the tobacco shreds' own weight mg moving downward over a distance h (W2); the work done by the tobacco shreds inside the cigarette paper over a distance h over a frictional force f with a kinetic friction coefficient of μ; the increase in elastic potential energy W4 after the tobacco shreds are compressed; the heat energy E3 generated when part of the tobacco shreds breaks due to compression, considering the tobacco shreds as a linearly elastic material with an elastic coefficient of k; and the internal energy E4 generated by the compression and reset of the filter tip. W 1 =FS E 1 =mgH E 2 =1 / 2mv 2 W 2 =mgh W 3 =mgμh W 4 =1 / 2kh 2 E 内 =E 3 +E 4 In summary: W 1 +E 1 =E 2 =W 2 +W 3 +W 4=E 内 Among them, E_internal energy, which is the sum of the heat energy E3 generated after the partial compression and breakage of the tobacco shreds and the internal energy E4 generated by the compression and resetting of the filter tip, changes by an extremely small amount and can be temporarily ignored for the sake of macroscopic analysis. The formula can be simplified to: FS + mgH = 1 / 2 mv 2 = mgh + mgμh+ 1 / 2 kh 2 The above describes the energy conversion process in one vibration cycle. After n reciprocating vibrations, it is ultimately expressed as a three-dimensional functional relationship between the distance h from which the tobacco falls before and after the knocking, the vibration velocity v, and the number of vibrations n.

[0041] Σ 1 / 2mv 2 = Σ (mgh+mgμh+1 / 2kh) 2 ） Because the instrument, through prior research on consumer smoking habits and the capture of information from manual tapping movements, determined the maximum speed V and effective distance H of the cigarette during downward tapping, its function is to reproduce the motion state of manual tapping as closely as possible. This means ensuring that the speed remains constant at the end of each downward movement, equal to the maximum manual speed V. Therefore, the reduced-dimensional function expression is mainly a two-dimensional function of the number of taps n and the distance h from which the tobacco falls. The coordinate graph obtained from the experimental data is shown below. Figure 5 As shown.

[0042] Data analysis revealed that after the nth tap, the tobacco shreds fell a constant distance h. After the next n+i taps (i=n+1, n+2…), the falling distance was less than 0.01mm. The tobacco shred compactness of the cigarette was defined as… a =h / n, which means the distance the tobacco falls per unit number of taps is the density of the tobacco in the cigarette. The smaller the value, the better the density of the cigarette.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detecting the compactness of tobacco shreds in a vibrating rotating carrier, characterized in that, The system includes: a chassis containing a rotating platform, a detection unit, a vibration unit, and a driving unit; the rotating platform is rotatably mounted on top of the vibration unit; multiple cigarette detection stations are evenly arranged on the top of the rotating platform from its center to its inner circumference, each station having multiple cigarette positioning holes; and a continuous ring of teeth is formed on the outer circumference of the rotating platform; the vibration unit includes, from bottom to top, a fixed bracket, a pull rod cylinder, a flange, an annular damping pad, a connecting shaft, and a first coupling; the pull rod of the pull rod cylinder passes through the flange and the annular damping pad, and is rotatably connected to the bottom of the rotating platform via the connecting shaft and the first coupling; the driving unit includes a power gear and a transition gear. The power gear is horizontally arranged and at the same height as the teeth on the outer periphery of the turntable. The power gear is mounted on the inner wall of the chassis via a stepped shaft and an upper bracket. The transition gear is fixedly connected to the inner wall of the chassis via a rectangular bracket and a switching cylinder. After the transition gear extends under the action of the switching cylinder, it can simultaneously mesh with the teeth on the outer periphery of the power gear and the turntable. The detection unit is located above the turntable. The detection unit includes a cantilever beam bracket fixed to the inner wall of the chassis and a set of laser displacement sensors installed at the bottom of the cantilever beam bracket. Each laser displacement sensor can be positioned directly above the cigarette positioning hole in any of the cigarette detection stations after the turntable rotates, and can detect the height of the cigarettes inside.

2. The device for detecting the compactness of tobacco shreds in a vibrating rotating carrier according to claim 1, characterized in that, The number of laser displacement sensors is not less than the number of cigarette positioning holes opened at any of the cigarette detection stations.

3. The device for detecting the compactness of tobacco shreds in a vibrating rotating carrier according to claim 2, characterized in that, The number of cigarette detection stations is 5, arranged in a pentagonal star shape along the radius of the rotating platform, and the number of cigarette positioning holes on each cigarette detection station is 4.

4. The device for detecting the compactness of tobacco shreds in a vibrating rotating carrier according to claim 1, characterized in that, A buffer spring and a pressure cover are installed inside the flange. The pull rod of the pull rod cylinder passes through the buffer spring, the pressure cover and the annular damping pad in sequence, and is fixedly connected to the connecting shaft. The connecting shaft is rotatably connected to the connecting cover plate and roller bearing at the bottom of the load turntable through the first coupling. The top of the cylinder body of the pull rod cylinder is provided with an upper support frame fixedly connected to it. The two sides of the upper support frame are fixedly connected to the bottom of the chassis through support components.

5. The device for detecting the compactness of tobacco shreds in a vibrating rotating carrier according to claim 1, characterized in that, The bottom of the rotating platform is provided with an air chamber, and the middle of the rotating platform is provided with a quick plug for connecting to an external air source. Each cigarette positioning hole is connected to the air chamber, and the bottom of each cigarette positioning hole is provided with a rubber sleeve that fixes the cigarette filter under the action of the air chamber. The charging and discharging of the lever cylinder, the switching cylinder and the air chamber are all controlled by a valve island installed on the inner wall of the chassis. The upper and lower air passage interfaces of the lever cylinder and the switching cylinder are respectively equipped with speed regulating valves, and the speed regulating valves are connected to an external positive pressure air source.

6. The device for detecting the compactness of tobacco shreds in a vibrating rotating carrier according to claim 1, characterized in that, A keyway is provided on the stepped shaft, and the center of the power gear is connected to the keyway on the stepped shaft. The upper end of the stepped shaft is rotatably connected to the upper bracket through a bearing, and the lower end of the stepped shaft is connected to the stepper motor through a second coupling. The upper end of the stepper motor is connected to the lower bracket, and the lower bracket is fixed on the inner side wall of the chassis. The lower end of the stepper motor is fixed to the inner support column at the bottom of the chassis through a damping buffer pad.

7. The device for detecting the compactness of tobacco shreds in a vibrating rotating carrier according to claim 6, characterized in that, The transition gear is rotatably connected to the rectangular bracket via bearings and a mounting shaft. Both ends of the mounting shaft are fitted with spherical bearings, which can move linearly along the upper and lower guide rails. Under the auxiliary guiding action of the upper and lower guide rails and the extension and retraction action of the switching cylinder, the transition gear engages and disengages with the outer circumferential teeth of the power gear and the cargo turntable. The base of the switching cylinder is fixed to the inner side wall of the chassis via a damping buffer pad.

8. The device for detecting the compactness of tobacco shreds in a vibrating rotating carrier according to claim 1, characterized in that, The top of the chassis is provided with a rotatable top cover, which is connected to the inner side wall of the chassis by hinges and gas struts. The front side of the chassis is provided with a rotatable front door, and both the top cover and the front door are equipped with safety interlock devices.

9. The device for detecting the compactness of tobacco shreds in a vibrating rotating carrier according to claim 1, characterized in that, The side of the chassis is equipped with a touch screen all-in-one computer, an external data transmission interface and a power switch. A heat dissipation box is also installed on the side wall of the chassis.

10. The device for detecting the compactness of tobacco shreds in a vibrating rotating carrier according to claim 1, characterized in that, The flange is equipped with a receiving end of a speed detector, and the bottom of the cargo turntable is fixed with a marking end of the speed detector.

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