Cigarette rod compactness force detection system

Abstract

The application discloses a cigarette tightness detection system, which is composed of a test table, a linear displacement table, a fixed base, a moving support driven by a linear actuator, a plurality of tension and pressure sensors and displacement sensors, a test base, an expansion force plate, a cigarette fixing table, a cigarette clamp, a signal collector, a controller and a driving control module. The fixed base moves horizontally on the linear displacement table, the moving support is slidably connected with the fixed base and the test base, the linear actuator is connected with the moving support through the tension and pressure sensors, and the displacement sensors are used for detecting the action parameters of the moving support. The other side of the moving support is connected with the separable and foldable expansion force plate through the tension and pressure sensors, and the tip of the force plate is directed to the center of the cigarette clamp arranged in the cigarette fixing table. The application provides an effective solution for the tightness index detection of the cigarette tobacco segment, and fills the industry blank for the detection scene and the specific index.

Description

Technical Field

[0001] This invention relates to the field of cigarette manufacturing, and in particular to a system for detecting the tightness of tobacco segments in cigarettes. Background Technology

[0002] Cigarettes are made by wrapping tobacco in cigarette paper. Due to the elasticity of tobacco, the cigarette-making process involves a mechanical change in the tobacco, first compressing and then relaxing (or expanding). Constrained by the track and cigarette paper, the force acting on the tobacco can be viewed as a stress relaxation process where the volume of the tobacco remains constant after compression, and the stress decreases over time. During this process, the stress cannot relax to zero and eventually interacts with the cigarette paper to reach equilibrium. This equilibrium force is a direct reflection of the force exerted by the tobacco on the cigarette paper. The magnitude of this equilibrium force directly affects quality indicators such as loose ends, end defects, and thin ends in cigarettes. Therefore, detecting this equilibrium force is of great significance for quality analysis and improvement.

[0003] Given a fixed circumference, the amount of tobacco filling, filling value, and elasticity determine the magnitude of the balanced stress in the tobacco segments of a cigarette. During cigarette production, on the one hand, methods such as setting tight ends, increasing the amount of tobacco filling, increasing the filling value, and improving elasticity are used to increase the wrapping force at the ends, thereby reducing quality defects such as empty ends, fuzzy ends, sparse ends, and end-bursting defects. On the other hand, rejection devices are used to remove unqualified cigarettes with empty ends, fuzzy ends, and sparse ends. However, end-bursting defects require offline detection and cannot be removed online. End-bursting defects are a comprehensive indicator, correlated with quality indicators such as single cigarette weight, tightness specifications, tobacco structure, tobacco elasticity, and filling value, as well as cigarette machine parameters, and the direction of influence varies. Setting the single cigarette weight requires comprehensive consideration of the cigarette's sensory quality, physical quality, smoke quality, and consumption, and is often determined through a combination of experimentation and experience. Tightness specifications are generally provided by the equipment manufacturer, and some companies determine the corresponding specifications based on their impact on sensory quality and consumption. However, since each machine produces multiple specifications of cigarettes, each type of cigarette... The tobacco filling amount, filling value, elasticity, tobacco structure, and processing resistance of cigarettes vary considerably, and factors such as the drift in the tight end position lead to significant differences in quality indicators and consumption, such as empty ends, loose ends, sparse ends, and end-bursting, among different specifications of cigarettes produced on the same machine. The tobacco filling amount is controlled by the equipment and is subject to certain fluctuations. The tobacco filling value is closely related to factors such as moisture content, airflow velocity, amount of recycled tobacco, and consistency of tobacco structure, all of which are subject to certain fluctuations. Due to the numerous and complex influencing factors, it is difficult to accurately determine the correlation between each factor and empty ends, loose ends, sparse ends, and end-bursting in cigarettes through experiments. There is an urgent need to find a new, directly measurable index that can measure its relationship with quality indicators such as empty ends, loose ends, sparse ends, and end-bursting in cigarettes, and then construct a relationship model between it and cigarette circumference, tobacco structure, filling value, single cigarette weight, and elasticity, so as to provide guidance for cigarette weight design, rolling quality improvement, and consumption reduction.

[0004] Analysis revealed that quality defects such as hollow ends, rough ends, sparse ends, and end-bursting tobacco in cigarettes are closely related to the stress on the tobacco segments. Since the industry lacks a reliable solution for studying rolling quality from a mechanical perspective, and also lacks a corresponding and comprehensive testing system, this invention defines the balanced stress generated by the circumferential wrapping of cigarette shreds by the cigarette paper as the compaction force. Analysis showed that with the same amount of tobacco filling at the ends, as the circumference increases, the cigarette's compaction force decreases, making it easier for quality defects such as hollow ends, rough ends, sparse ends, and end-bursting tobacco to occur. The lower the filling value and elasticity of different tobacco specifications, the lower the cigarette's compaction force. With a fixed filling amount, when the filling value and elasticity are similar, the less tobacco content below 2.0mm, the higher the cigarette's end compaction force, and the fewer quality defects such as hollow ends, rough ends, sparse ends, and end-bursting tobacco.

[0005] Based on the aforementioned prior art and the background of the analysis and research of this invention, the following disclosed solution is proposed to effectively and reliably fill the industry gap corresponding to the heating cigarette compactness detection system. Summary of the Invention

[0006] In view of the above, the present invention aims to provide a cigarette tobacco segment tightness detection system to solve the aforementioned technical problems.

[0007] The technical solution adopted in this invention is as follows:

[0008] This invention provides a cigarette tobacco segment tightness detection system, including: a test table, a linear displacement table, a fixed base, a movable bracket driven by a linear actuator to perform separation and closing actions, multiple tension and compression sensors, multiple displacement sensors, a test base, an expansion force measuring plate, a cigarette fixing table, a cigarette clamp, a signal acquisition unit, a controller, and a drive control module.

[0009] The test bench is equipped with the linear displacement stage, the cigarette holder, the signal acquisition unit, the controller, and the drive module. The controller and the drive module are electrically connected to the linear displacement stage, the linear actuator, the tension / compression sensor, and the displacement sensor, respectively, through the signal acquisition unit.

[0010] The fixed base is connected to the linear displacement platform and can move horizontally on the linear displacement platform. The test base is fixedly connected to the fixed base, and the two sides of the movable bracket are slidably connected to the fixed base and the test base, respectively.

[0011] The linear actuator is mounted on the fixed base and connected to the movable support via the corresponding tension / compression sensor; the displacement sensor is mounted on the fixed base to detect the motion parameters of the movable support.

[0012] The movable bracket is connected to a separable and collapsible expansion force measuring plate on the side near the test base via the corresponding tension and compression sensor, and the insertion end of the collapsible expansion force measuring plate faces the center of the cigarette clamp arranged in the cigarette fixing platform.

[0013] In at least one possible implementation, the fixed base includes a fixed base base and a fixed base functional part, the fixed base base is horizontally moved by the linear displacement stage, the fixed base functional part is provided with a fixed base groove, and one side of the movable bracket passes through the fixed base groove.

[0014] In at least one possible implementation, the fixed base is fixedly connected to the horizontal displacement stage of the linear displacement stage, and the fixed base functional part is fixedly connected to the test base through a plurality of horizontal connecting columns.

[0015] In at least one possible implementation, two linear actuators are symmetrically fixed on the fixed base functional part, and the movable bracket includes two sets of interconnected horizontal bracket parts and vertical bracket parts, and each horizontal bracket part is connected to the end of the corresponding linear actuator through a tension / compression sensor;

[0016] The expansion force measuring plate includes two sets of interconnected horizontal and vertical force measuring plate parts; and the test base is provided with a test base groove, the vertical part of the bracket passes through the test base groove and is connected to the corresponding vertical part of the force measuring plate through a tension or compression sensor.

[0017] In at least one possible implementation, the vertical portion of the force measuring plate is a flat plate structure, and the horizontal portion of the force measuring plate is a semi-needle structure.

[0018] In at least one possible implementation, the two horizontal portions of the force measuring plates are connected by a connecting membrane made of a stretchable flexible material.

[0019] In at least one possible implementation, the base of the cigarette holder has a vertical slide bar, the top of which is connected to a horizontal slide bar via a locking block. A vertical locking knob and a horizontal locking knob are arranged on both sides of the locking block, and one side of the horizontal slide bar is connected to a clamp receiving cavity via a receiving cavity locking knob. The cigarette clamp is placed inside the clamp receiving cavity, and the outer surface of the cigarette clamp is flush with the outer surface of the clamp receiving cavity.

[0020] In at least one possible implementation, a laser displacement sensor is arranged on the surface of the test base to measure the distance between the test base and the outer surface of the cigarette holder, and a marker point is provided at a preset position on the outer surface of the cigarette holder.

[0021] In at least one possible implementation, the detection system further includes a leveling mechanism connected to the test bench;

[0022] The bottom surface of the test platform is connected to the connecting sleeve at the top of the leveling mechanism, and the connecting sleeve is connected to a screw. The screw passes through the rotating sleeve around the fixed platform located in the middle of the leveling mechanism and is fixedly connected to the leveling knob at the bottom.

[0023] In at least one possible implementation, the detection system further includes a display that is electrically connected to the controller and the drive control module.

[0024] Compared with existing technologies, the main design concept of this invention is that it is mainly composed of a test platform, a linear displacement stage, a fixed base, a movable support driven by a linear actuator to perform separation and closing actions, multiple tension and compression sensors, multiple displacement sensors, a test base, an expansion force measuring plate, a cigarette fixing platform, a cigarette clamp, a signal acquisition unit, a controller, and a drive control module. The fixed base moves horizontally on the linear displacement stage. The two sides of the movable support are slidably connected to the fixed base and the test base, respectively. The linear actuator is connected to the movable support through corresponding tension and compression sensors. The displacement sensors are installed at the fixed base to detect the action parameters of the movable support. One side of the movable support is connected to a separable and closable expansion force measuring plate through a corresponding tension and compression sensor, and the insertion end of the expansion force measuring plate faces the center of the cigarette clamp arranged in the cigarette fixing platform. This invention provides an effective solution for detecting the tightness index of cigarette tobacco segments, filling the industry gap for this detection scenario and this specific index. Attached Figure Description

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings, wherein:

[0026] Figure 1 This is an overall schematic diagram of the tobacco section compactness detection system provided in an embodiment of the present invention;

[0027] Figure 2 A front view of some of the components provided in an embodiment of the present invention;

[0028] Figure 3 for Figure 2 A top-view schematic diagram (the expansion force measuring plate is in the closed state);

[0029] Figure 4 for Figure 3 Schematic diagram of the AA half section;

[0030] Figure 5 This is a schematic diagram of the separation state of the expansion force measuring plate provided in an embodiment of the present invention;

[0031] Figure 6 This is a top view of the cigarette holder provided in an embodiment of the present invention. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0033] This invention proposes an embodiment of a cigarette tobacco segment compactness detection system, specifically, as follows: Figure 1 and Figure 2 As shown, it includes: a test bench 1, a linear displacement stage 3, a fixed base 4, a movable bracket 5 driven by a linear actuator to perform separation and closing actions, multiple tension and compression sensors, multiple displacement sensors, a test base 9, an expansion force measuring plate 10, a cigarette fixing platform 12, a cigarette clamp 14, a signal acquisition device 15, and a controller and drive control module 16.

[0034] The test bench 1 is equipped with the linear displacement stage 3, the cigarette holder 12, the signal acquisition device 15, and the controller and drive module 16. The controller and drive module 16 are electrically connected to the linear displacement stage 3, the linear actuator, the tension / compression sensor, and the displacement sensor through the signal acquisition device 15. Preferably, a display 17 is also electrically connected to the controller and drive module 16.

[0035] The fixed base 4 is connected to the linear displacement stage 3 and moves horizontally on the linear displacement stage 3. The test base 9 is fixedly connected to the fixed base 4. The two sides of the moving bracket 5 are slidably connected to the fixed base 4 and the test base 9, respectively. The linear actuator is installed on the fixed base 4 and connected to the moving bracket 5 through the corresponding tension and compression sensors. The displacement sensor is installed on the fixed base 4 to detect the action parameters of the moving bracket 5.

[0036] The movable bracket 5 is connected to a separable and collapsible expansion force measuring plate 10 on the side near the test base 9 via the corresponding tension and compression sensor, and the insertion end of the collapsible expansion force measuring plate 10 faces the center of the cigarette clamp 14 disposed in the cigarette fixing platform 12.

[0037] In more detail: This system also includes a leveling mechanism 2 connected to the test platform 1, which is used to adjust the levelness of the test platform 1; specifically as follows... Figure 1As shown, the bottom surface of the test platform 1 is connected to the connecting sleeve 21 at the top of the leveling mechanism 2. A screw 24 is connected to the connecting sleeve 21, which passes through a rotating sleeve 22 arranged around the fixed platform 23, and its bottom is fixedly connected to the leveling knob 25. Therefore, when leveling is required, simply rotating the leveling knob 25 will rotate the screw 24 within the rotating sleeve 22 and the connecting sleeve 21, thereby adjusting the height of the four corners of the test platform 1 and thus adjusting the levelness of the test platform 1 surface. The levelness of the test platform is related to the linear displacement stage placed on it.

[0038] Continuing from the previous text, the linear displacement stage 3 is fixed to the test stage 1 with screws, and then as follows... Figure 2 As shown, the fixed base 41 of the fixed base 4 is fixedly connected to the horizontal displacement stage 31 of the linear displacement stage 3 by screws, thereby allowing the fixed base 4 and its components to move horizontally. The fixed base 4 also includes a fixed base functional part 42, which is connected to the test base 9 by four identical horizontal connecting columns 8 and screws, thereby securing the test base 9 to the fixed base 4.

[0039] The main test structures are arranged on the fixed base functional part 42, such as Figure 3 and Figure 4 As shown, they are symmetrically distributed along the horizontal axis. Specifically, the movable bracket 5 is slidably connected to the fixed base functional part 42. In actual operation, the fixed base functional part 42 is provided with a fixed base slide groove 421, and the movable bracket 5 includes two movable bracket horizontal parts 51 and two movable bracket vertical parts 52. The left tail of the movable bracket horizontal part 51 passes through the fixed base slide groove 421 and can be translated vertically along the slide groove trajectory.

[0040] Two linear actuators are symmetrically fixed on the fixed base functional section 42. The horizontal section 51 of the moving bracket is connected to the end of the linear actuator via tension / compression sensors, which are used to detect the tension and compression on both sides. Furthermore, displacement sensors are arranged on the fixed base functional section 42 to detect the distance between a single horizontal section 51 of the moving bracket and its corresponding displacement sensor. The detection result can be equivalent to the displacement and velocity of the horizontal section 51 of the moving bracket in the vertical direction. Figure 3 and Figure 4 As shown, the first displacement sensor 111 and the second displacement sensor 112 are symmetrically distributed on the surface of the fixed base functional part 42.

[0041] The movable support 5 is slidably connected to the test base 9. Specifically, the test base 9 is provided with a test base groove 91, and the vertical part 52 of the movable support 5 is arranged in the test base groove 91 and can move vertically along the groove trajectory. When the linear actuator is running, its end moves vertically, and the tension / compression sensor can drive the movable support 5 to move vertically along the groove trajectory.

[0042] To achieve the spreading action, two linear actuators are used and arranged symmetrically, namely the first linear actuator 71 and the second linear actuator 72 shown in the figure. Correspondingly, two tension / compression sensors connected to them are also configured, namely the first tension / compression sensor 61 and the second tension / compression sensor 62 shown in the figure.

[0043] Based on this embodiment and in conjunction with the accompanying drawings, the above configuration will be further described in detail below (only one side will be briefly described, and the other side will not be elaborated upon): The horizontal part 51 of the movable bracket is connected to the end of the first linear actuator 71 through the threads at both ends of the first tension / compression sensor 61. The first linear actuator 71 is fixed to the functional part 42 of the fixed base by screws, and the tension and compression on both sides can be tested by the first tension / compression sensor 61. Similarly, when the first linear actuator 71 is running, that is, when its end performs vertical translational movement, the first tension / compression sensor 61 can drive the movable bracket 5 to perform vertical translational movement along the slide track.

[0044] Continuing from the previous text, each of the vertical portions 52 of the movable support is connected to the expansion measuring plate 10 via a tension / compression sensor. Specifically, the expansion measuring plate 10 includes two horizontal portions 101 and two vertical portions 102. A single horizontal portion 101 and a single vertical portion 102 are connected as a whole. Preferably, the vertical portion 102 is a flat plate and is arranged in the slide groove 91 of the test base. The horizontal portion 101 is half of a long needle and half of its tip is needle-shaped. When combined, they form a complete needle shape to facilitate the insertion of a cigarette.

[0045] Here, we will still describe one side only, and will not elaborate on the symmetrical other side: One vertical part 52 of the movable support 5 is connected to one vertical part 102 of the expansion force measuring plate 10 via threads at both ends of a third tension / compression sensor 63 (the symmetrical other side is the fourth tension / compression sensor 64 shown in the figure). The third tension / compression sensor 63 can then test the tension and compression on both sides. Therefore, the vertical translational motion at the end of the first linear actuator 71 is ultimately converted into the vertical translational motion of the expansion force measuring plate 10, more specifically, into the vertical translational motion of the horizontal part 101 of the expansion force measuring plate. Furthermore, as mentioned earlier, the displacement sensor measures the displacement and velocity of the horizontal part 51 of the movable support in the vertical direction. Therefore, it can be understood that this displacement and velocity also characterize the displacement and velocity of the horizontal part 101 of the expansion force measuring plate in the vertical translational motion.

[0046] Understandably, Figure 3 A schematic diagram illustrating the closed state of the expansion force measuring plate is provided. Figure 5 The different operating states of this device are demonstrated, specifically the separation state of the expansion force measuring plates. Briefly, based on the preceding explanation, it is described as follows: When the linear actuator drives the moving bracket 5 to perform a vertical translational movement, the horizontal part and working part of the moving bracket 5 slide in the fixed base groove 421 and the test base groove 91, respectively, thereby driving the expansion force measuring plate 10 to perform a vertical translational movement. Therefore, the two symmetrically distributed horizontal parts 101 of the expansion force measuring plates move relative to each other, that is, gradually move away (or conversely, move towards each other, i.e., close). Based on... Figure 5 Additionally, in some other preferred embodiments, the two horizontal portions 101 of the expansion force measuring plates are connected by an expansion force measuring plate connecting film 103, which is a stretchable and flexible material.

[0047] Continuing from the previous text, such as Figure 2 and Figure 6As shown, the base 121 of the cigarette holder 12 is screwed to the upper surface of the test bench 1. The top of the vertical slide rod 122 on the base 121 is connected to the horizontal slide rod 125 via a locking block 123. Vertical locking knobs 124 and horizontal locking knobs 126 are arranged on both sides of the locking block 123. One side of the horizontal slide rod 125 is connected to the clamp receiving cavity 127 via a receiving cavity locking knob 128. Thus, by adjusting the vertical position of the locking block 123 and fixing it with the vertical locking knob 124, and by adjusting the horizontal slide rod through the locking block 123 and fixing it with the horizontal locking knob 126, the physical position of the clamp receiving cavity 127 can be adjusted and fixed. A cigarette holder 14 is placed inside the clamp receiving cavity. The exposed outer surface of the cigarette holder 14 is flush with the outer surface of the clamp receiving cavity 127. The test cigarette 13 can be arranged inside the cigarette holder 14 with both end faces flush. The two contact each other through the circumferential surface of the cigarette and provide support. Thus, the position of the test cigarette 13 can be adjusted by adjusting the position of the clamp receiving cavity 127, so that the test cigarette 13 is aligned with the axis of the horizontal part 101 of the expansion force measuring plate.

[0048] Based on the above embodiments, and combined with Figure 2 and Figure 4 As shown, a third displacement sensor 113 can be arranged on the surface of the test base 9 to measure the distance between the test base 9 and the exposed surface of the cigarette holder 14. Furthermore, a marker point is set at a preset position on the exposed outer surface of the cigarette holder 14. Thus, by observing whether the position of the laser emitted by the third displacement sensor 113 onto the outer surface of the cigarette holder 14 coincides with the marker point, it can be determined whether the horizontal part 101 of the expansion force measuring plate and the test cigarette 13 are aligned (aligned). If they are not aligned, alignment can be achieved by adjusting the cigarette fixing platform 12. In addition, those skilled in the art will understand that the measurement signal from the third displacement sensor 113 can also be used to calculate the speed of the horizontal part 101 of the expansion force measuring plate relative to the test cigarette 13.

[0049] Based on the above embodiments, the testing steps and principles of this system are explained below:

[0050] 1. Before testing, adjust the leveling knob to make the test platform level and calibrate it using a level.

[0051] 2. Connect the power supply. The controller and drive control module control the reset of the linear displacement stage and linear actuator (the linear actuator resets to a position where the two horizontal expansion force measuring plates are tightly fitted). It also enables the tension / compression sensors, displacement sensors, and display, and samples, filters, and stores the electrical signals from the linear displacement stage, linear actuator, tension / compression sensors, and displacement sensors. The reset of the linear actuator is determined by the displacement sensors arranged on the surface of the fixed base functional section. Specifically, it is determined by measuring the vertical distance between the displacement sensor and the horizontal part of the moving bracket to a specified design value (where the two horizontal expansion force measuring plates are tightly fitted).

[0052] 3. Adjust the cigarette holder to align the needle-shaped structure formed by the horizontal sections of the two expansion force measuring plates with the test cigarette. Specifically, by observing whether the position of the laser emitted by the displacement sensor to the outer surface of the cigarette holder coincides with the preset mark point, it can be determined whether the needle-shaped structure formed by the closing of the horizontal sections of the two expansion force measuring plates is aligned (aligned with the axis) with the test cigarette.

[0053] 4. The controller and drive control module control the linear displacement stage to move towards the test cigarette according to predetermined commands until the needle-shaped structure formed by the horizontal parts of the two expansion force measuring plates penetrates the test cigarette to a specified depth at a predetermined speed. During this process, the resultant force recorded by the tension and compression sensors located at the expansion force measuring plates is the frictional force of the system penetrating the cigarette;

[0054] 5. The controller and drive control module control the end of the linear actuator to perform vertical translational movement through predetermined commands, causing the needle-shaped structure formed by the horizontal parts of the two expansion force measuring plates to separate relative to each other, and the connecting membrane of the expansion force measuring plates to expand (e.g., Figure 5 (As shown in the enlarged view at point B). At this point, the resultant force recorded by the two tension and compression sensors located at the linear actuator is the cigarette clamping force.

[0055] Furthermore, the control and detection logic involved in the separation process in step 5 can be divided into two categories:

[0056] 5a. The controller and drive control module control the end of the linear actuator to perform vertical translational movement at a predetermined speed and maximum cumulative displacement until it reaches the maximum cumulative displacement. During this process, the resultant force recorded by the two tension and compression sensors is used as a reference for calculating the cigarette's clamping force. In a specific embodiment, the electrical signal output by the motor control module built into the linear actuator is processed by the controller and drive control module and calculated into the real-time speed and cumulative displacement of the end of the linear actuator; in a preferred embodiment, the electrical signal of the vertical distance between the displacement sensor at the fixed base and the horizontal part of the moving bracket is processed and converted into the real-time displacement and movement speed values ​​of the end of the linear actuator.

[0057] 5b. The controller and drive control module control the end of the linear actuator to perform vertical translational movement according to a predetermined tension lifting rate and the maximum tension design value, until the resultant force recorded by the two tension and pressure sensors reaches the maximum tension design value for a certain period of time. After the system forces are balanced, the displacement of the horizontal parts of the two expansion force measuring plates relative to each other in the vertical direction is used as a reference for calculating the cigarette's tightness. Specifically, the displacement of the horizontal parts of the two expansion force measuring plates relative to each other is equal to twice the distance moved vertically by the horizontal part of a single moving bracket, or the average of the two. The distance moved vertically by the horizontal part of a single moving bracket can be calculated from the electrical signal fed back by the displacement sensor at the fixed base. In a specific embodiment, the electrical signal output by the motor control module built into the linear actuator is processed and calculated by the controller and drive control module to obtain the real-time tension provided by the end of the linear actuator; in a preferred embodiment, the electrical signal output by the motor control module built into the linear actuator is compared and calculated with the electrical signals of the two tension and pressure sensors, and then processed to obtain the real-time tension provided by the end of the linear actuator.

[0058] 6. Finally, after the test is completed, the controller and drive module sequentially reset the linear actuator and linear displacement stage according to predetermined instructions. Specifically, the horizontal parts of the two moving supports gradually move closer together until they are tightly fitted, and then the resulting needle-shaped structure moves away from the test cigarette.

[0059] In summary, the main design concept of this invention is as follows: it is mainly composed of a test platform, a linear displacement stage, a fixed base, a movable support driven by a linear actuator to perform separation and closing actions, multiple tension / compression sensors, multiple displacement sensors, a test base, an expansion force measuring plate, a cigarette fixing platform, a cigarette clamp, a signal acquisition unit, a controller, and a drive control module. The fixed base moves horizontally on the linear displacement stage. The two sides of the movable support are slidably connected to the fixed base and the test base, respectively. The linear actuator is connected to the movable support through corresponding tension / compression sensors. The displacement sensors are installed at the fixed base to detect the action parameters of the movable support. One side of the movable support is connected to a separable and closable expansion force measuring plate through a corresponding tension / compression sensor, and the insertion end of the expansion force measuring plate faces the center of the cigarette clamp arranged in the cigarette fixing platform. This invention provides an effective solution for detecting the tightness index of cigarette tobacco segments, filling the industry gap for this detection scenario and this specific index.

[0060] In this invention, when directional terms are mentioned, they are relative concepts based on the embodiments. Furthermore, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0061] The above description of the structure, features, and effects of the present invention is based on the embodiments shown in the figures. However, the above are only preferred embodiments of the present invention. It should be noted that the technical features involved in the above embodiments and their preferred methods can be reasonably combined and matched by those skilled in the art to form a variety of equivalent solutions without departing from or changing the design concept and technical effects of the present invention. Therefore, the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A system for detecting the compactness of tobacco segments in a cigarette stick, characterized in that, include: Test bench, linear displacement stage, fixed base, movable bracket driven by linear actuator to perform separation and closing actions, multiple tension and compression sensors, multiple displacement sensors, test base, expansion force measuring plate, cigarette fixing table, cigarette clamp, signal acquisition unit, controller and drive control module; The test bench is equipped with the linear displacement stage, the cigarette holder, the signal acquisition unit, the controller, and the drive module. The controller and the drive module are electrically connected to the linear displacement stage, the linear actuator, the tension / compression sensor, and the displacement sensor, respectively, through the signal acquisition unit. The fixed base is connected to the linear displacement platform and can move horizontally on the linear displacement platform. The test base is fixedly connected to the fixed base, and the two sides of the movable bracket are slidably connected to the fixed base and the test base, respectively. The linear actuator is mounted on the fixed base and connected to the movable support via the corresponding tension / compression sensor; the displacement sensor is mounted on the fixed base to detect the motion parameters of the movable support. The movable bracket is connected to a separable and collapsible expansion force measuring plate on the side near the test base via the corresponding tension and compression sensor, and the insertion end of the collapsible expansion force measuring plate faces the center of the cigarette clamp arranged in the cigarette fixing platform.

2. The cigarette tobacco segment compactness detection system according to claim 1, characterized in that, The fixed base includes a fixed base base and a fixed base functional part. The fixed base base moves horizontally via the linear displacement table. The fixed base functional part is provided with a fixed base sliding groove, and one side of the movable bracket passes through the fixed base sliding groove.

3. The cigarette tobacco segment compactness detection system according to claim 2, characterized in that, The fixed base is fixedly connected to the horizontal displacement stage of the linear displacement stage, and the functional part of the fixed base is fixedly connected to the test base through several horizontal connecting columns.

4. The cigarette tobacco segment compactness detection system according to claim 2, characterized in that, Two linear actuators are symmetrically fixed on the functional part of the fixed base. The movable bracket includes two sets of interconnected horizontal bracket parts and vertical bracket parts. Each horizontal bracket part is connected to the end of the corresponding linear actuator through a tension / compression sensor. The expansion force measuring plate includes two sets of interconnected horizontal and vertical force measuring plate parts; and the test base is provided with a test base groove, the vertical part of the bracket passes through the test base groove and is connected to the corresponding vertical part of the force measuring plate through a tension or compression sensor.

5. The cigarette tobacco segment compactness detection system according to claim 4, characterized in that, The vertical part of the force measuring plate has a flat plate structure, and the horizontal part of the force measuring plate has a semi-needle structure.

6. The cigarette tobacco segment compactness detection system according to claim 4, characterized in that, The two force measuring plates are connected by a connecting membrane made of a stretchable and flexible material.

7. The cigarette tobacco segment compactness detection system according to claim 1, characterized in that, The base of the cigarette holder has a vertical slide rod. The top of the vertical slide rod is connected to the horizontal slide rod by a locking block. Vertical locking knobs and horizontal locking knobs are arranged on both sides of the locking block. One side of the horizontal slide rod is connected to the clamp receiving cavity by a receiving cavity locking knob. The cigarette clamp is placed inside the clamp receiving cavity. The outer surface of the cigarette clamp is flush with the outer surface of the clamp receiving cavity.

8. The cigarette tobacco segment compactness detection system according to claim 7, characterized in that, A laser displacement sensor is arranged on the surface of the test base to measure the distance between the test base and the outer surface of the cigarette holder, and a mark point is provided at a preset position on the outer surface of the cigarette holder.

9. The cigarette tobacco segment compactness detection system according to any one of claims 1 to 8, characterized in that, The detection system also includes a leveling mechanism connected to the test bench; The bottom surface of the test platform is connected to the connecting sleeve at the top of the leveling mechanism, and the connecting sleeve is connected to a screw. The screw passes through the rotating sleeve around the fixed platform located in the middle of the leveling mechanism and is fixedly connected to the leveling knob at the bottom.

10. The cigarette tobacco segment compactness detection system according to any one of claims 1 to 8, characterized in that, The detection system also includes a display that is electrically connected to the controller and drive control module.

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