Cigarette compacting end constant increment control method and device of cigarette making machine and cigarette making machine

Abstract

The invention relates to a constant increment control method and device for a cigarette compacting end of a cigarette making machine and the cigarette making machine. The method comprises the following steps: acquiring a compaction end increment of the cigarette making machine in real time, and calculating a statistical value of the compaction end increment of the cigarette making machine; judging whether the statistical value of the compaction end increment in the current observation period exceeds a preset range or not; if the statistical value of the compaction end increment exceeds the preset range, the position of a leveler is obtained, and the statistical value of the position of the leveler is calculated; judging whether the statistical value of the position of the leveler in the current observation period is abnormal or not; and according to whether the statistical value of the position of the leveler is abnormal or not and based on the statistical value of the compaction end increment, adjusting parameters of a cigarette making machine control system, so that the statistical value of the compaction end increment is within a preset range. By means of the method, the consistency of the end density of the cigarette and the product quality stability can be remarkably improved.

Description

Technical Field

[0001] The present application relates to the field of tobacco processing technology, and in particular to a method, device, and computer equipment for controlling a constant increment of the cigarette compacting end of a cigarette making machine. Background Art

[0002] During cigarette production, the compacted end increment is a key physical indicator of cigarette quality. This increment is the additional increment at the lit end of a cigarette, ensuring a higher density than the rest of the cigarette. This increment is intended to prevent empty cigarettes caused by tobacco falling from the end during cutting, transport, and consumption. The stability of the compacted end increment significantly impacts the stability of physical indicators such as weight and circumference, as well as the stability of mainstream smoke and sensory quality. The quality of the compacted end depends not only on the size of the increment but also on its stability, uniformity of distribution, and smoothness of transition.

[0003] However, existing research on compaction end quality focuses on optimizing the size of the flattener or adjusting the offset of the compaction end to improve product stability. However, during cigarette production, due to numerous factors, such as variations in the incoming tobacco mix between batches, intra-group fluctuations, changes in tobacco filling properties, intra-shift wear of the suction ribbon, and variations in the center of mass, the incremental increment of the compaction end of cigarettes inevitably fluctuates within and between batches. However, there is no research on how to control the incremental increment of the compaction end in real time during production. Therefore, effective and real-time control of the incremental increment of the compaction end of cigarettes is crucial for ensuring cigarette product quality. Summary of the Invention

[0004] Based on this, it is necessary to provide a method, device and cigarette making machine for controlling the constant increment of the compacting end of cigarettes, which can realize timely and effective control of the increment of the compacting end of cigarettes, in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a method for controlling a constant increment at the cigarette compacting end of a cigarette making machine, comprising:

[0006] Obtaining the compaction end increment of the cigarette making machine in real time and calculating the statistical value of the compaction end increment of the cigarette making machine;

[0007] Determine whether the statistical value of the compaction end increment in the current observation period exceeds a preset range;

[0008] If the statistical value of the compaction end increment exceeds the preset range, obtaining the leveler position and calculating the statistical value of the leveler position;

[0009] Determine whether the statistical value of the leveler position in the current observation period is abnormal;

[0010] According to whether the statistical value of the leveler position is abnormal and based on the statistical value of the compaction end increment, the cigarette making machine control system parameters are adjusted so that the statistical value of the compaction end increment is within a preset range.

[0011] In some embodiments, the cigarette making machine control system parameters include: spring reel speed, air chamber negative pressure, and needle roller speed.

[0012] In some embodiments, the proportional adjustment of cigarette making machine control system parameters based on the statistical value of the leveler position and the deviation value of the compaction end increment includes:

[0013] If the statistical value of the leveler position is abnormal, it is determined whether the speed of the spring reel has reached the limit of the adjustable range;

[0014] If the speed of the wire reel does not reach the limit of the adjustable range, the speed of the wire reel is adjusted proportionally based on the deviation value of the compaction end increment;

[0015] If the statistical value of the leveler position is normal, or if the speed of the spring reel has reached the limit of the adjustable range, the negative pressure of the air chamber or the speed of the needle roller is proportionally adjusted based on the deviation value of the compaction end increment.

[0016] In some embodiments, the proportional adjustment of the air chamber negative pressure or the needle roller speed based on the deviation value of the compaction end increment includes:

[0017] If the negative pressure in the air chamber does not reach the limit of the adjustable range, adjusting the negative pressure in the air chamber;

[0018] If the negative pressure in the air chamber reaches the limit of the adjustable range, the rotational speed of the needle roller is adjusted.

[0019] In some embodiments, the statistical value of the compaction end increment includes the arithmetic mean or standard deviation of the compaction end increment during the observation period; the statistical value of the leveler position includes at least one of the arithmetic mean, maximum value or minimum value.

[0020] In some embodiments, adjusting the speed of the reel includes:

[0021] Presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment;

[0022] Setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases;

[0023] According to the adjustment range to which the deviation value of the compaction end increment in the current observation period belongs, the speed of the wire reel is adjusted in a corresponding proportion; wherein the increase in the speed of the wire reel is positively correlated with the increase in the compaction end increment.

[0024] In some embodiments, adjusting the negative pressure in the air chamber includes:

[0025] Presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment;

[0026] Setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases;

[0027] The negative pressure of the wind chamber is adjusted in a corresponding proportion according to the adjustment interval to which the deviation value of the compaction end increment in the current observation period belongs; wherein the increase in the negative pressure of the wind chamber is positively correlated with the increase in the compaction end increment.

[0028] In some examples, adjusting the rotation speed of the needle roller includes:

[0029] Presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment;

[0030] Setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases;

[0031] According to the adjustment range to which the deviation value of the compaction end increment in the current observation period belongs, the needle roller speed is adjusted in a corresponding proportion; wherein the increase in the needle roller speed is positively correlated with the increase in the compaction end increment.

[0032] In a second aspect, the present application further provides a constant increment control device for the cigarette compacting end of a cigarette making machine, comprising:

[0033] The first acquisition module is used to obtain the compaction end increment of the cigarette making machine in real time and calculate the statistical value of the compaction end increment of the cigarette making machine;

[0034] A first judgment module is used to judge whether the statistical value of the compaction end increment in the current observation period exceeds a preset range;

[0035] A second acquisition module is configured to acquire a leveler position and calculate a statistical value of the leveler position if the statistical value of the compaction end increment exceeds the preset range;

[0036] A second judgment module is used to judge whether the statistical value of the leveler position in the current observation period is abnormal;

[0037] The adjustment module is used to adjust the cigarette making machine control system parameters in proportion according to the statistical value of the leveler position and the deviation value of the compaction end increment.

[0038] In a third aspect, the present application further provides a cigarette-making machine, comprising the constant increment control device at the cigarette compacting end of the cigarette-making machine in the second aspect.

[0039] The above-mentioned method, device and cigarette making machine for controlling the constant increment of the compacted end of cigarettes achieves real-time adjustment of the increment of the compacted end of cigarettes through real-time detection of multiple parameters, including the increment of the compacted end of cigarettes, the position of the leveler, the negative pressure in the air chamber, the speed of the spring reel and the speed of the needle roller, hierarchical execution and proportional adjustment rules based on deviation values. This method is simple to implement and does not require the installation of additional detection devices. It can significantly improve the control level of the increment of the compacted end of cigarettes, solve the problem of the center value of the compacted end increment offset caused by various random fluctuations in the existing cigarette production process, avoid the differences and control lag caused by reliance on human experience during manual adjustment, and can significantly improve the consistency of the density of the end of cigarettes and the stability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 Schematic diagram of the structure of a cigarette-making machine's tobacco supply system in one embodiment;

[0042] Figure 2 1. A schematic flow chart of a method for controlling a constant increment of cigarettes at the cigarette compacting end of a cigarette making machine according to an embodiment of the present invention;

[0043] Figure 3 A schematic flow chart of the steps for adjusting parameters of a cigarette making machine according to an embodiment;

[0044] Figure 4 Schematic diagram showing a comparison of the compacting end increments before and after the application of the constant increment control method for the compacting end of cigarettes in a cigarette making machine according to an embodiment;

[0045] Figure 5 1. A structural block diagram of a constant increment control device at the cigarette compacting end of a cigarette making machine according to an embodiment of the present invention;

[0046] Figure 6 2 is a flow chart of a method for controlling a constant increment at the cigarette compacting end of a cigarette making machine in another embodiment. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0048] The embodiment of the present application provides a method for controlling the constant increment of cigarette compacting end of a cigarette making machine, which can be applied to Figure 1 In the cigarette making machine shown. Figure 1 The figure shows the tobacco supply system structure of the cigarette making machine, which includes a needle roller 1, a tobacco spring reel 2, a tobacco conveyor belt 3, a tobacco throwing roller 4, an air chamber 5, and a tobacco suction belt 6. During operation, tobacco is conveyed to the tobacco conveyor belt 3 through the channel between the needle roller 1 and the tobacco spring reel 2. A tobacco wind chamber 5 is installed in the tobacco chamber above the tobacco conveyor belt 3. The wind chamber 5 and the tobacco throwing roller 4 act to throw the tobacco into the hopper and be sucked up by the tobacco suction belt 6. The needle roller 1 is a rotating roller with fine needles. The needles penetrate the tobacco layer, loosening agglomerated tobacco and transporting it to the next process. Its rotation speed affects the uniformity of the internal structure of the cigarette. The tobacco spring reel 2 is a high-speed rotating metal roller. The raised structures on its surface collide and rub against the tobacco, loosening, homogenizing, and directionalizing the tobacco. The air chamber 5 is a cavity structure that uses airflow to control the tobacco, forming a uniform tobacco layer through negative pressure adsorption. The value of the negative pressure affects the packing density of the tobacco. After the above processing, the tobacco enters the leveler, a component that adjusts the distribution of the tobacco at the compacting end. The leveler, through its grooved structure, creates a localized high-density area in the cigarette, preventing the end from falling off. Furthermore, the cigarette-making machine includes integrated sensors for real-time acquisition of key parameters such as compacting end density, leveler position, reel speed, air chamber negative pressure, and needle roller speed. It also includes a control system with integrated data acquisition, logic operation, and command output modules, including but not limited to industrial control equipment such as industrial computers, PLCs, and embedded controllers.

[0049] In an exemplary embodiment, Figure 2 As shown, a method for controlling the constant increment of cigarette compacting end of a cigarette making machine is provided. Figure 1 The cigarette making machine control system in the embodiment of the present invention is described as an example, which includes the following steps S201 to S206.

[0050] Step S201: obtaining the increment of the compacting end of the cigarette making machine in real time and calculating the statistical value of the increment of the compacting end of the cigarette making machine.

[0051] The compaction end increment refers to the additional fill density of the tobacco at the lit end of a cigarette relative to the rest of the cigarette. It prevents "hollow ends" caused by tobacco falling off the end of the cigarette during cutting, transporting, or smoking. Adjusting the position of the leveler directly affects the uniformity of tobacco distribution at the compaction end, and thus the stability of the compaction end increment.

[0052] Statistical analysis is performed on the collected compaction end increment data according to a pre-set observation cycle. The observation cycle refers to the minimum data unit used for statistical analysis and process adjustment. Specifically, N consecutive cigarettes or M groups of N consecutive cigarettes can be divided into one observation cycle. The calculation of the statistical values of the compaction end increment of the cigarette making machine includes, but is not limited to, the arithmetic mean and standard deviation, which are used to characterize the central trend and fluctuation range of the compaction end increment within the current cycle. The calculation of the compaction end increment statistical values can provide a quantitative basis for subsequent control.

[0053] Step S202: determine whether the statistical value of the compaction end increment in the current observation period exceeds a preset range.

[0054] The preset range refers to the design value of the compaction end increment and its allowable fluctuation range, pre-set based on the quality requirements of cigarette products. If the statistical value of the compaction end increment calculated during the current cycle exceeds the tolerance range, it is determined to be an abnormal compaction end increment. Specifically, the design value can be set as a target percentage, and the preset range is the upper and lower limits of this target value. Exceeding this range indicates fluctuations in the production process that require intervention.

[0055] Step S203: If the statistical value of the compaction end increment exceeds the preset range, the leveler position is obtained and the statistical value of the leveler position is calculated.

[0056] Among them, the smoother position refers to the voltage signal feedback value of the smoothing plate used to adjust the distribution of tobacco in the cigarette making machine relative to the reference position. Its numerical range is related to the equipment model, and the signal can be collected in real time by the sensor.

[0057] When the statistical value of the compaction end increment exceeds a preset range, the original data of the leveler position corresponding to the abnormal compaction end increment is synchronously obtained from the cigarette making machine control system. Statistical analysis is performed on the leveler position data to calculate its statistical value, which can be a parameter that characterizes the stability of the leveler operation, such as the position average value, extreme value, or fluctuation range within a cycle.

[0058] Step S204: determine whether the statistical value of the leveler position in the current observation period is abnormal.

[0059] The normal range of the leveler position is pre-set according to the equipment model and process requirements. Based on the calculation result of step S203, if the statistical value of the leveler position exceeds the normal range, it is determined to be abnormal.

[0060] Step S205 , according to whether the statistical value of the leveler position is abnormal and based on the statistical value of the compaction end increment, adjust the cigarette making machine control system parameters so that the statistical value of the compaction end increment is within a preset range.

[0061] Specifically, the control system parameters of the cigarette making machine may include any one of the speed of the spring reel, the negative pressure in the air chamber, or the speed of the needle roller. After determining whether the statistical value of the leveler position is abnormal, the above key process parameters are dynamically adjusted. Through the above adjustment strategy, a closed-loop control system with a constant increment at the compacting end of the cigarette making machine is formed. This loop mechanism can quickly respond to random fluctuations in the production process, such as changes in incoming tobacco and equipment wear, ensuring that the increment at the compacting end remains stable within the designed value range, thereby improving the uniformity and consistency of cigarette quality.

[0062] In this embodiment, by acquiring key parameters such as the compaction end increment and the leveler position in real time, a feedback control strategy is established. There is no need to install additional detection or control devices on the equipment. This can solve the problem of the compaction end increment center value offset caused by various random fluctuations in the existing cigarette production process, and avoid the differences and control lags caused by reliance on human experience during manual adjustment.

[0063] In an exemplary embodiment, the statistical value of the compaction end increment and the statistical value of the leveler position are calculated as follows:

[0064] For the compaction end increment, the statistical value within a certain observation period can be in the form of arithmetic mean or standard deviation. Specifically, the calculation formula for the arithmetic mean is:

[0065]

[0066] in, is the incremental test value of the compacted end of a single compressed cigarette, in percentage (%). is the total number of cigarettes in the current observation period. The arithmetic mean reflects the central trend of the compaction end increments within the period and is used to determine whether there is deviation from the design center.

[0067] The formula for calculating standard deviation is:

[0068]

[0069] in, This is the arithmetic mean of the increments at the compacted end of the cigarettes during the control period. The standard deviation quantifies the degree of fluctuation within the group. When the mean is normal but the standard deviation exceeds the standard, it indicates a problem with the uniformity of the tobacco distribution.

[0070] For the leveler position, a method for calculating the statistical value within a certain observation period includes at least one of an arithmetic mean, a maximum value, or a minimum value.

[0071] Among them, the arithmetic mean can be used to reflect the average working position of the leveler within a period, and the minimum and maximum values refer to the extreme position offsets of the leveler captured within an observation period. The specific formula will not be repeated here.

[0072] In some exemplary embodiments, Figure 3 As shown, the process of proportionally adjusting the cigarette making machine control system parameters according to the statistical value of the leveler position and the deviation value of the compaction end increment includes steps S301 to S303.

[0073] Step S301: If the statistical value of the leveler position is abnormal, it is determined whether the speed of the springing reel reaches the limit of the adjustable range.

[0074] It's understood that the tobacco-feeding reel in a cigarette-making machine is responsible for conveying cut tobacco, directly altering its structure and affecting its supply and uniformity. The higher the reel speed, the more "broken" the tobacco becomes, reducing its filling properties. This weakens the tobacco's structural support, increasing the amount of tobacco within the same volume and, consequently, increasing the density at the compacted end. In this embodiment, the reel speed is preferably used to prioritize the adjustment of the compacted end increment.

[0075] Based on the calculation results of the above-mentioned leveler position statistics, if the leveler position statistics are abnormal, the speed of the reel is obtained. Since the reel in the cigarette making machine system has a speed limit, if the speed has reached the limit of the adjustable range, it is necessary to consider adjusting other control elements to achieve the control purpose.

[0076] Step S302: If the speed of the wire reel has not reached the limit of the adjustable range, the speed of the wire reel is proportionally adjusted based on the deviation value of the compaction end increment.

[0077] Based on step S301, if the reel speed has not reached the limit, the deviation value of the compaction increment is calculated and divided into multiple levels, each corresponding to a different adjustment intensity level. A correspondence between the deviation level and the adjustment amplitude is established, and the reel speed is adjusted accordingly. The higher the reel speed, the greater the increment of the compaction end of the cigarette.

[0078] Step S303: If the statistical value of the leveler position is normal, or if the speed of the springing reel has reached the limit of the adjustable range, the negative pressure of the air chamber or the speed of the needle roller is proportionally adjusted based on the deviation value of the compaction end increment.

[0079] It can be understood that based on step S301, if there is no abnormality in the calculation result of the leveler position, or the result of step S302 is that the speed of the wire reel has reached the limit range, this step is entered to adjust the air chamber negative pressure or the needle roller speed based on the deviation value of the compaction end increment.

[0080] In this embodiment, the layered adjustment strategy and multi-parameter coordinated control are used to solve the problem of uneven compaction of cigarettes caused by abnormal position of the smoother during operation of the cigarette making machine, which can effectively overcome the defect that traditional single parameter adjustment is prone to cause equipment overload or adjustment lag.

[0081] In an exemplary embodiment, proportionally adjusting the negative pressure of the air chamber or the speed of the needle roller based on the deviation value of the compaction end increment includes the following steps:

[0082] Step S401: If the negative pressure in the air chamber has not reached the limit of the adjustable range, the negative pressure in the air chamber is adjusted.

[0083] Normally, the negative pressure in the air chamber does not adjust the total amount and structure of the input tobacco, but only adjusts the size of the suction. The incremental adjustment effect is achieved by adjusting the amount of tobacco in the same volume. The advantage is the fastest adjustment speed, and the disadvantage is that the adjustable range is small, so it can be understood as "fine adjustment". In this embodiment, when there is no abnormality in the statistical value of the leveler position, or the speed of the silk reel can no longer be adjusted, the negative pressure in the air chamber is adjusted first. The negative pressure in the air chamber is proportional to the increment at the compaction end. The higher the negative pressure in the air chamber, the stronger the adsorption force of the tobacco, and therefore the higher the density at the compaction end. In this embodiment, the control of the negative pressure in the air chamber is achieved by a butterfly valve. Specifically, the negative pressure in the air chamber is obtained in real time by a pressure sensor. . According to the different equipment, determine the adjustable range limit range of the current equipment's air chamber negative pressure [ ],contrast and the preset adjustable range. [ ], it has not reached the limit and enters the wind chamber negative pressure adjustment; if ,or , indicating that the limit has been reached, then proceed to the needle roller adjustment step.

[0084] Step S402: If the negative pressure in the air chamber reaches the limit of the adjustable range, the speed of the needle roller is adjusted.

[0085] In this embodiment, when both the speed of the reel and the negative pressure in the air chamber cannot be adjusted further, the compaction end increment is adjusted by adjusting the speed of the needle roller. The needle roller is used to adjust the supply of tobacco, and its speed has a certain influence on the structure of the tobacco, but the influence is limited. The faster the needle roller speed, the greater the supply of tobacco per unit time, and the greater the compression ratio of the tobacco under the suction pressure per unit time.

[0086] It should be noted that, in the above embodiments, the method of adjusting the speed of the spring reel based on the deviation value of the compaction end increment is not unique. For example, in some embodiments, Figure 4 As shown, adjusting the speed of the reel includes the following steps:

[0087] Step S501, presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment;

[0088] Among them, the deviation value of the compaction end increment is is the difference between the statistical value of the compaction end increment and the preset value during the current observation period. For example, The value after taking the absolute value , which is divided into three situations: small deviation interval, medium deviation interval, and large deviation interval. Belongs to the small deviation range, Belongs to the medium deviation range, It belongs to the large deviation range.

[0089] Step S502: setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases;

[0090] It is understandable that the proportionality coefficient Is a dynamically adjusted weight factor, in each adjustment interval Different values can represent different adjustment strategies. Specifically, the hierarchical setting based on the range of the absolute value of the deviation can be as shown in Table 1:

[0091] Table 1

[0092]

[0093] Step S503, adjusting the speed of the wire reel in a corresponding proportion according to the adjustment interval to which the deviation value of the compaction end increment in the current observation period belongs; wherein the increase in the speed of the wire reel is positively correlated with the increase in the compaction end increment.

[0094] Specifically, the adjustment formula for the speed of the wire reel is:

[0095] 100

[0096] In this embodiment, by The segmented interval can realize small adjustment for small deviation and large adjustment for large deviation, which can take into account both the response speed and stability of the control.

[0097] Similarly, there is no unique way to adjust the negative pressure of the air chamber in proportion to the deviation value of the compaction end increment. In some exemplary embodiments, adjusting the negative pressure of the air chamber includes:

[0098] Deviation value for the compaction end increment in advance Set a plurality of continuous adjustment intervals; set a corresponding proportional coefficient for each of the adjustment intervals, and the proportional coefficient is adjusted accordingly. The absolute value of The negative pressure of the air chamber is adjusted according to the corresponding proportion within the adjustment range; wherein the increase in the negative pressure of the air chamber is positively correlated with the increase in the increment of the compaction end.

[0099] Specifically, the deviation between the actual measured value of the compaction end increment and the set value is calculated as follows: , then the adjustment formula for the air chamber negative pressure is:

[0100] 100

[0101] in, is the current negative pressure in the air chamber, The proportional coefficient for adjusting the negative pressure in the air chamber can be set in layers according to the range of the absolute value of the deviation in a similar manner to that in Table 1, and will not be described in detail here.

[0102] Similarly, in other embodiments, the method for adjusting the rotation speed of the needle roller includes:

[0103] Deviation value for the compaction end increment in advance Set multiple continuous adjustment intervals; set corresponding proportional coefficients for each adjustment interval, and the proportional coefficients change with the The absolute value of The speed of the needle roller is adjusted according to the corresponding proportion within the adjustment range; among which, the increase in the speed of the needle roller is positively correlated with the increase in the increment of the compaction end.

[0104] Specifically, the deviation between the actual measured value of the compaction end increment and the set value is calculated as follows: , then the adjustment formula of the needle roller speed is:

[0105] 100

[0106] in, is the current needle roller speed, The proportional coefficient for the needle roller is adjusted, and the layered setting strategy according to the range of the absolute value of the deviation can be similar to that in Table 1, which will not be repeated here.

[0107] For ease of understanding, this solution is described and illustrated in detail below through a preferred embodiment.

[0108] In a preferred embodiment, based on a ZJ116 cigarette making machine, a certain brand of cut tobacco is used, and the cigarette specification is (30+54)×17.0mm. The same specification of cigarette products is produced using the constant increment control method of the cigarette compacting end. The flow chart is as follows: Figure 6 The specific steps are as follows:

[0109] Step S601: obtaining the increment of the compacted end of the cigarette making machine in real time and calculating the statistical value of the increment of the compacted end of the cigarette.

[0110] The compaction end increment data of a single cigarette of the cigarette making machine is obtained in real time. In this preferred embodiment, the control period is set to 256 consecutive single long cigarettes, and the arithmetic mean of the compaction end increment is calculated to be 9.055%.

[0111] Step S602: Determine whether the increment of the compacted end of the cigarettes is abnormal during the observation period.

[0112] The control requirements are set as follows: the compaction end increment setting value is: 10%; the preset arithmetic mean value of the 256 compaction end increments is allowed to have a range of ±0.7%, that is, the preset range is [9.3,10.7].

[0113] According to the calculation in step S601, the arithmetic mean of the increments at the compacted ends of the 256 cigarettes is 9.055%, which exceeds the preset range of [9.3, 10.7] and is abnormal.

[0114] Step S603: If the statistical value of the compaction end increment is abnormal, the leveler position within the abnormal period of the compaction end increment is calculated.

[0115] The smoother position data synchronized with the incremental data of the compacted end of the cigarettes during the observation period were obtained, and the arithmetic mean of the smoother position was obtained to be -0.53V.

[0116] Step S604: determine whether the position of the leveler is abnormal during this observation period.

[0117] Since the normal range of the leveler position of this specification and this model is set to [-4V, +3V], the arithmetic mean of the leveler position -0.53V is within the normal range of the leveler position, and it is determined that there is no abnormality in the leveler position.

[0118] Step S605: If there is no abnormality in the statistical value of the leveler position, it is determined whether the current value of the air chamber negative pressure has reached an extreme value.

[0119] First, the trigger obtains the current value of the air chamber negative pressure, which is -105 mbar. The air chamber negative pressure extreme value range of this machine is set to [-105, -90] mbar. The current value of the air chamber negative pressure has reached the set extreme negative pressure of -105 mbar.

[0120] Step S606: If the current negative pressure in the air chamber reaches an extreme value, the needle roller speed is adjusted.

[0121] Deviation according to compaction end increment =10.0%-9.055%=0.945%, needle roller speed Perform graded adjustment, the needle roller speed is currently =37r / min, the target value of needle roller speed adjustment is In this embodiment, the following adjustment formula is used:

[0122] 100

[0123] in, is the proportional coefficient, and the result is rounded off. [0.7, 1.5]%, =1.1; when hour, =1.3. Therefore, the target value of the needle roller speed adjustment in this embodiment is =37r / min+1.1×0.945%×100≈38r / min.

[0124] In this example, to better eliminate other external influences, the same batch of cut tobacco was used to produce cigarettes of the same specifications. The constant increment control method for the compaction end was enabled for 5 minutes and disabled for 5 minutes, respectively, in 10-minute groups. The long-term deviation of the constant increment of the compaction end before and after application is shown in Table 2.

[0125] Table 2

[0126]

[0127] It can be seen that after applying this method, the absolute value of the long-term standard deviation mean of the compaction end increment is reduced by 0.87%. Figure 4 As shown in the figure, the overall fluctuation of the compaction end increment after application is significantly better than that before application.

[0128] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0129] Based on the same inventive concept, the present application also provides an apparatus for implementing the aforementioned method for controlling the constant increment of cigarettes at the compacting end of a cigarette making machine. The solution provided by this apparatus is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more apparatus embodiments provided below can be found in the aforementioned definition of the method for controlling the constant increment of cigarettes at the compacting end of a cigarette making machine, and will not be further elaborated here.

[0130] In an exemplary embodiment, Figure 5 As shown, a constant increment control device 1000 of a cigarette compacting end of a cigarette making machine is provided, comprising a first acquisition module 1001, a first judgment module 1002, a second acquisition module 1003, a second judgment module 1004, and an adjustment module 1005, wherein:

[0131] The first acquisition module 1001 is used to obtain the compaction end increment of the cigarette making machine in real time and calculate the statistical value of the compaction end increment of the cigarette making machine;

[0132] The first judgment module 1002 is used to judge whether the statistical value of the compaction end increment in the current observation period exceeds a preset range;

[0133] The second acquisition module 1003 is configured to acquire the position of the leveler and calculate the statistical value of the position of the leveler when the statistical value of the compaction end increment exceeds the preset range.

[0134] The second judgment module 1004 is used to judge whether the statistical value of the leveler position in the current observation period is abnormal;

[0135] The adjustment module 1005 is used to adjust the cigarette making machine control system parameters in proportion according to the statistical value of the leveler position and the deviation value of the compaction end increment.

[0136] In one embodiment, the first acquisition module 1001 further implements the following steps:

[0137] Calculate the arithmetic mean or standard deviation of the compaction end increments during the observation period.

[0138] In one embodiment, the second acquisition module 1003 further implements the following steps:

[0139] Calculate at least one of the arithmetic mean, maximum value, or minimum value of the leveler position during the observation period.

[0140] In one embodiment, the adjustment module 1005 further implements the following steps:

[0141] If the statistical value of the leveler position is abnormal, it is determined whether the speed of the spring reel has reached the limit of the adjustable range;

[0142] If the speed of the wire reel does not reach the limit of the adjustable range, the speed of the wire reel is adjusted proportionally based on the deviation value of the compaction end increment;

[0143] If the statistical value of the leveler position is normal, or if the speed of the spring reel has reached the limit of the adjustable range, the negative pressure of the air chamber or the speed of the needle roller is proportionally adjusted based on the deviation value of the compaction end increment.

[0144] In one embodiment, the adjustment module 1005 further implements the following steps:

[0145] If the negative pressure in the air chamber does not reach the limit of the adjustable range, adjusting the negative pressure in the air chamber;

[0146] If the negative pressure in the air chamber reaches the limit of the adjustable range, the rotational speed of the needle roller is adjusted.

[0147] In one embodiment, the adjustment module 1005 further implements the following steps:

[0148] Presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment;

[0149] Setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases;

[0150] According to the adjustment range to which the deviation value of the compaction end increment in the current observation period belongs, the speed of the wire reel is adjusted in a corresponding proportion; wherein the increase in the speed of the wire reel is positively correlated with the increase in the compaction end increment.

[0151] In one embodiment, the adjustment module 1005 further implements the following steps:

[0152] Presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment;

[0153] Setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases;

[0154] The negative pressure of the wind chamber is adjusted in a corresponding proportion according to the adjustment interval to which the deviation value of the compaction end increment in the current observation period belongs; wherein the increase in the negative pressure of the wind chamber is positively correlated with the increase in the compaction end increment.

[0155] In one embodiment, the adjustment module 1005 further implements the following steps:

[0156] Presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment;

[0157] Setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases;

[0158] According to the adjustment range to which the deviation value of the compaction end increment in the current observation period belongs, the needle roller speed is adjusted in a corresponding proportion; wherein the increase in the needle roller speed is positively correlated with the increase in the compaction end increment.

[0159] Each module in the aforementioned constant increment control device for the cigarette compacting end of a cigarette making machine can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in the computer device's memory in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0160] In an exemplary embodiment, a cigarette making machine is provided, including a device for controlling a constant increment of the compacted end of cigarettes. When the cigarette making machine executes a method for controlling a constant increment of the compacted end of cigarettes, the following steps are implemented:

[0161] Obtaining the compaction end increment of the cigarette making machine in real time and calculating the statistical value of the compaction end increment of the cigarette making machine;

[0162] Determine whether the statistical value of the compaction end increment in the current observation period exceeds a preset range;

[0163] If the statistical value of the compaction end increment exceeds the preset range, obtaining the leveler position and calculating the statistical value of the leveler position;

[0164] Determine whether the statistical value of the leveler position in the current observation period is abnormal;

[0165] According to whether the statistical value of the leveler position is abnormal and based on the statistical value of the compaction end increment, the cigarette making machine control system parameters are adjusted so that the statistical value of the compaction end increment is within a preset range.

[0166] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0167] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for controlling the constant increment of cigarette compacting end of a cigarette making machine, characterized in that: The method comprises: Obtaining the compaction end increment of the cigarette making machine in real time and calculating the statistical value of the compaction end increment of the cigarette making machine; Determine whether the statistical value of the compaction end increment in the current observation period exceeds a preset range; If the statistical value of the compaction end increment exceeds the preset range, obtaining the leveler position and calculating the statistical value of the leveler position; Determine whether the statistical value of the leveler position in the current observation period is abnormal; According to whether the statistical value of the leveler position is abnormal and based on the statistical value of the compaction end increment, the cigarette making machine control system parameters are adjusted so that the statistical value of the compaction end increment is within a preset range.

2. The method according to claim 1, characterized in that The cigarette making machine control system parameters include: the speed of the spring reel, the negative pressure of the air chamber, and the speed of the needle roller.

3. The method according to any one of claims 1-2, characterized in that The method of proportionally adjusting the cigarette making machine control system parameters according to the statistical value of the leveler position and the deviation value of the compaction end increment includes: If the statistical value of the leveler position is abnormal, it is determined whether the speed of the wire reel has reached the limit of the adjustable range; If the speed of the wire reel does not reach the limit of the adjustable range, the speed of the wire reel is adjusted proportionally based on the deviation value of the compaction end increment; If the statistical value of the leveler position is normal, or if the speed of the spring reel has reached the limit of the adjustable range, the air chamber negative pressure or the needle roller speed is proportionally adjusted based on the deviation value of the compaction end increment.

4. The method according to claim 3, characterized in that The proportional adjustment of the air chamber negative pressure or the needle roller speed based on the deviation value of the compaction end increment includes: If the negative pressure in the air chamber does not reach the limit of the adjustable range, adjusting the negative pressure in the air chamber; If the negative pressure in the air chamber reaches the limit of the adjustable range, the rotational speed of the needle roller is adjusted.

5. The method according to claim 1, wherein The statistical value of the compaction end increment includes the arithmetic mean or standard deviation of the compaction end increment within the observation period; the statistical value of the leveler position includes at least one of the arithmetic mean, maximum value or minimum value.

6. The method according to claim 3, characterized in that The adjusting of the speed of the thread reel comprises: Presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment; Setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases; According to the adjustment range to which the deviation value of the compaction end increment in the current observation period belongs, the speed of the wire reel is adjusted in a corresponding proportion; wherein the increase in the speed of the wire reel is positively correlated with the increase in the compaction end increment.

7. The method according to claim 3, characterized in that The adjusting of the negative pressure of the air chamber comprises: Presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment; Setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases; The negative pressure of the wind chamber is adjusted in a corresponding proportion according to the adjustment interval to which the deviation value of the compaction end increment in the current observation period belongs; wherein the increase in the negative pressure of the wind chamber is positively correlated with the increase in the compaction end increment.

8. The method according to claim 3, characterized in that The adjusting of the needle roller speed comprises: Presetting a plurality of continuous adjustment intervals for the deviation value of the compaction end increment; Setting a corresponding proportional coefficient for each adjustment interval, and the proportional coefficient increases as the absolute value of the deviation value of the compaction end increment increases; According to the adjustment range to which the deviation value of the compaction end increment in the current observation period belongs, the needle roller speed is adjusted in a corresponding proportion; wherein the increase in the needle roller speed is positively correlated with the increase in the compaction end increment.

9. A constant increment control device for the cigarette compacting end of a cigarette making machine, characterized in that: The device comprises: The first acquisition module is used to obtain the compaction end increment of the cigarette making machine in real time and calculate the statistical value of the compaction end increment of the cigarette making machine; A first judgment module is used to judge whether the statistical value of the compaction end increment in the current observation period exceeds a preset range; A second acquisition module is configured to acquire a leveler position and calculate a statistical value of the leveler position if the statistical value of the compaction end increment exceeds the preset range; A second judgment module is used to judge whether the statistical value of the leveler position in the current observation period is abnormal; The adjustment module is used to adjust the cigarette making machine control system parameters in proportion according to the statistical value of the leveler position and the deviation value of the compaction end increment.

10. A cigarette making machine, characterized in that: It includes the constant increment control device for the compacted end of the cigarette as described in claim 9.

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