Filter rod draw resistance stability online control method, system, terminal and medium

Abstract

The filter rod suction resistance stability online control method, system, terminal and medium of the application, in the production process, combining with the existing online detection SPCD system, based on the V1 / VKDF adjustment amount calculated by the SPCD filter rod suction resistance mean control chart corresponding to the change of the mean value trend, the filter rod suction resistance mean value is adjusted accurately, which reduces the adjustment times, prevents over-adjustment and adjustment not in place, improves the stability of the filter rod suction resistance mean value, and reduces the difference between the filter rod suction resistance mean values in the single silk package, which is beneficial to the stability of the whole filter rod; and for the filter rod suction resistance standard deviation in the group, the standardized adjustment of the process parameters and the combination of the equipment maintenance provide a new method for the operators in the actual production, reduce invalid adjustment, and the filter rod suction resistance standard deviation is obviously reduced.

Description

Technical Field

[0001] This invention relates to the field of filter rod suction resistance control, and in particular to an online control method, system, terminal, and medium for filter rod suction resistance stability. Background Technology

[0002] The stability of filter rod suction resistance is affected by factors such as the incoming fiber bundle, the process parameters of the KDF4 forming machine, the circumference change during filter rod production, and equipment maintenance. In actual production, the KDF4 forming machine is equipped with a comprehensive testing platform to detect the average value and standard deviation of filter rod suction resistance online, so as to make timely adjustments when suction resistance fluctuates. However, this method relies on the operator's experience and lacks data support.

[0003] Existing methods for controlling filter rod stability mainly rely on operators adjusting the filter rods based on the average and standard deviation data of the suction resistance measured on the QMU integrated testing bench. However, this often results in issues such as inadequate adjustment, over-adjustment, untimely adjustment, and poor adjustment effectiveness. These issues are mainly due to the following reasons:

[0004] (1) Average suction resistance: After communicating with the operators of each machine on site, it was believed that the average suction resistance of the filter rod should be controlled within the range required by the product. When adjusting, the V1 / VKDF value is usually adjusted based on the test results of a single filter rod and experience. However, over-adjustment or under-adjustment often occurs, and the average suction resistance still deviates from the center value after adjustment.

[0005] (2) Standard deviation of suction resistance: When adjusting the standard deviation of filter rod suction resistance, on-site operators usually observe the opening and closing state of the filament bundle, and then try to adjust parameters such as roller speed ratio V2 / V1, V3 / V2 based on their own experience, and observe the standard deviation data of filter rod suction resistance. However, the effect is poor because there are few parameters to be adjusted and they are not key parameters. The techniques of each operator are also different, making it difficult to judge the cause of the fluctuation of suction resistance stability in a short period of time and make corresponding adjustments in a timely manner.

[0006] Therefore, considering the existing equipment and information technology conditions, there is an urgent need to find a new online control method for the suction resistance stability of filter rods. Summary of the Invention

[0007] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a method, system, terminal and medium for online control of filter rod suction resistance stability, so as to solve the problems mentioned above in the prior art.

[0008] To achieve the above and other related objectives, the present invention provides an online control method for filter rod suction resistance stability. The method includes: online control of the filter rod suction resistance average value based on the V1 / VKDF adjustment amount calculated from the SPCD filter rod suction resistance average value control chart which shows a change in the corresponding suction resistance average value trend; and online control of the filter rod suction resistance standard deviation based on the suction resistance stability fluctuation, using a process parameter standardization adjustment method and an equipment maintenance method.

[0009] In one embodiment of the present invention, the method of calculating the V1 / VKDF adjustment amount based on the SPCD filter rod suction resistance average control chart that changes according to the corresponding suction resistance average trend includes: based on the constructed relationship model between V1 / VKDF and the filter rod suction resistance average, outputting the corresponding V1 / VKDF adjustment amount according to the SPCD filter rod suction resistance average control chart that changes according to the corresponding suction resistance average trend, and adjusting V1 / VKDF based on the V1 / VKDF adjustment amount to perform online control of the filter rod suction resistance average; wherein, the relationship model between V1 / VKDF and the filter rod suction resistance average is constructed based on the SPC discrepancy criterion.

[0010] In one embodiment of the present invention, the relationship model between V1 / VKDF and the average suction resistance of the filter rod is constructed by two discrimination criteria in the SPC discrimination criteria, so that the average suction resistance of the filter rod after adjusting V1 / VKDF according to the output V1 / VKDF adjustment amount conforms to the two discrimination criteria; wherein, the two discrimination criteria include: the sub-point falls outside 3σ and 9 consecutive points fall on the center line.

[0011] In one embodiment of the present invention, the online control of the filter rod's average suction resistance based on the V1 / VKDF adjustment amount calculated from the SPCD filter rod's average suction resistance control chart, which shows a change in the corresponding average suction resistance trend, includes: when the SPCD system's filter rod's average suction resistance control chart showing a change in the corresponding average suction resistance trend is obtained, determining whether the circumference of the filter rod has a significant reverse deviation; if there is no significant reverse deviation, then based on the relationship model between V1 / VKDF and the filter rod's average suction resistance, calculating the corresponding V1 / VKDF adjustment amount according to the filter rod's average suction resistance control chart, and adjusting V1 / VKDF based on the V1 / VKDF adjustment amount to perform online control of the filter rod's average suction resistance; if there is a significant reverse deviation, performing a circumference change adjustment operation.

[0012] In one embodiment of the present invention, the process parameter standardization adjustment method includes: based on the DOE standardized key process parameter calculation model, calculating the corresponding filter rod suction resistance stability key parameters according to the average suction resistance fluctuation data and the filter rod suction resistance standard deviation fluctuation data, and adjusting according to the filter rod suction resistance stability key parameters; wherein, the filter rod suction resistance stability key parameters include: delivery air pressure and opening / closing air pressure.

[0013] In one embodiment of the present invention, the equipment maintenance method includes one or more of the following: performing a three-stage opening channel herringbone air duct cleaning operation, a V2 roller and V3 roller and the area between them cleaning operation for fly shavings residue, a conveying nozzle cleaning operation, and a fan filter cleaning operation.

[0014] In one embodiment of the present invention, the online control method for filter rod suction resistance stability further includes: when production reaches the end of the material production, it is necessary to wait until the fiber bundle is completely produced before controlling the splicing of the fiber bundle with the waiting area to continue production.

[0015] To achieve the above and other related objectives, the present invention provides an online control system for filter rod suction resistance stability. The system includes: a filter rod suction resistance average value control module, used to control the filter rod suction resistance average value online based on the V1 / VKDF adjustment amount calculated from the SPCD filter rod suction resistance average value control chart which shows changes in the corresponding suction resistance average value trend; and a filter rod suction resistance standard deviation control module, used to control the filter rod suction resistance standard deviation online based on the suction resistance stability fluctuations, using standardized process parameter adjustment and equipment maintenance methods.

[0016] To achieve the above and other related objectives, the present invention provides an online control terminal for filter rod suction resistance stability, comprising: a memory for storing computer programs; and a processor for executing the online control method for filter rod suction resistance stability.

[0017] To achieve the above and other related objectives, the present invention provides a computer-readable storage medium storing a computer program that is executed by one or more processors to perform the method.

[0018] As described above, this invention provides an online control method, system, terminal, and medium for filter rod suction resistance stability, offering the following advantages: In the production process, this invention integrates with existing online SPCD (Special Purpose Controlled Filter Coil) systems. Based on the V1 / VKDF adjustment amount calculated from the SPCD filter rod suction resistance average control chart, which reflects the changing trend of the corresponding suction resistance average, the invention precisely adjusts the filter rod suction resistance average. This reduces the number of adjustments and prevents over-adjustment and under-adjustment, thus improving the stability of the filter rod suction resistance average. Furthermore, it reduces the difference in suction resistance averages between groups within a single yarn bundle, significantly benefiting the overall stability of the filter rod. Moreover, for the standard deviation of filter rod suction resistance within a group, a combination of standardized process parameter adjustments and equipment maintenance is used, providing operators with a new method in actual production, reducing ineffective adjustments, and significantly lowering the standard deviation of filter rod suction resistance. Attached Figure Description

[0019] Figure 1 The diagram shown is a flowchart illustrating the online control method for filter rod suction resistance stability according to an embodiment of the present invention.

[0020] Figure 2 The diagram shown is a flowchart illustrating the online control method for the average suction resistance of a filter rod according to an embodiment of the present invention.

[0021] Figure 3 The diagram shown is a schematic representation of the online control system for filter rod suction resistance stability in one embodiment of the present invention.

[0022] Figure 4 The diagram shown is a structural schematic of an online control terminal for filter rod suction resistance stability according to an embodiment of the present invention. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0024] It should be noted that in the following description, reference is made to the accompanying drawings, which illustrate several embodiments of the invention. It should be understood that other embodiments may also be used, and changes in mechanical composition, structure, electrical system, and operation may be made without departing from the spirit and scope of the invention. The following detailed description should not be considered limiting, and the scope of the embodiments of the invention is defined only by the claims of the published patents. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. Spatially related terms, such as “upper,” “lower,” “left,” “right,” “below,” “below,” “lower part,” “above,” “upper part,” etc., may be used herein to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0025] Throughout this specification, when it is said that a part is "connected" to another part, this includes not only "direct connection" but also "indirect connection" by placing other elements in between. Furthermore, when it is said that a part "includes" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather means that other constituent elements may also be included.

[0026] The terms "first," "second," and "third," etc., used herein are for the purpose of describing various parts, components, regions, layers, and / or segments, but are not limiting. These terms are used only to distinguish one part, component, region, layer, or segment from others. Therefore, the "first part," "component," "region," "layer," or "segment" described below may refer to a "second part," "component," "region," "layer," or "segment" without departing from the scope of this invention.

[0027] Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of the stated feature, operation, element, component, item, kind, and / or group, but do not preclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition arise only when combinations of elements, functions, or operations are inherently mutually exclusive in some manner.

[0028] This invention provides an online control method for filter rod suction resistance stability. During production, it integrates with an existing online SPCD (Special Purpose Controlled Filter Disc) system. Based on the V1 / VKDF adjustment calculated from the SPCD filter rod suction resistance average control chart showing changes in the corresponding suction resistance average trend, the method precisely adjusts the filter rod suction resistance average. This reduces the number of adjustments and prevents over-adjustment and under-adjustment, improving the stability of the filter rod suction resistance average. Furthermore, it reduces the difference in suction resistance averages between groups within a single yarn bundle, significantly benefiting the overall stability of the filter rod. Moreover, for the standard deviation of filter rod suction resistance within a group, a combination of standardized process parameter adjustments and equipment maintenance is used, providing operators with a new method in actual production, reducing ineffective adjustments, and significantly lowering the standard deviation of filter rod suction resistance.

[0029] The present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can readily implement it. The present invention can be embodied in many different forms and is not limited to the embodiments described herein.

[0030] like Figure 1 This is a flowchart illustrating an online control method for the suction resistance stability of a filter rod according to an embodiment of the present invention.

[0031] The method includes:

[0032] Step S1: The average suction resistance of the filter rod is controlled online based on the V1 / VKDF adjustment amount calculated from the SPCD filter rod suction resistance average value control chart which shows the change in the corresponding suction resistance average value trend.

[0033] In one embodiment, the method for calculating the V1 / VKDF adjustment based on the SPCD filter rod suction resistance mean control chart, which shows changes due to the corresponding suction resistance mean trend, includes:

[0034] Based on the constructed relationship model between V1 / VKDF and the average suction resistance of the filter rod, the corresponding V1 / VKDF adjustment amount is output according to the SPCD filter rod suction resistance average control chart which changes according to the trend of the corresponding suction resistance average value. Based on this V1 / VKDF adjustment amount, V1 / VKDF is adjusted to control the average suction resistance of the filter rod online.

[0035] The relationship model between V1 / VKDF and the average suction resistance of the filter rod is constructed based on the SPC discrepancy criterion.

[0036] It should be noted that the SPCD filter rod suction resistance mean control chart consists of multiple filter rod suction resistance mean points, and the preferred control chart is a set of data control charts for 5 filters in the SPCD system.

[0037] In one embodiment, the relationship model between V1 / VKDF and the average suction resistance of the filter rod is constructed by two discrimination criteria in the SPC discrimination criteria, so that the average suction resistance of the filter rod after adjusting V1 / VKDF according to the output V1 / VKDF adjustment amount conforms to the two discrimination criteria; wherein, the two discrimination criteria include: the sub-point falls outside 3σ and 9 consecutive points fall on the center line.

[0038] It should be noted that the relationship model between V1 / VKDF and the average suction resistance of the filter rod is trained using a historical data training set. This historical data training set is obtained by training data containing the average suction resistance change data of SPCD filter rods that meet two discrepancy criteria and the corresponding V1 / VKDF values.

[0039] In one embodiment, as the complete filament bundle is put into the production of filter rods, the height gradually decreases, the extraction distance of the filament bundle gradually increases, the weight of the suspended filament bundle gradually increases, the weight of the filter rod gradually decreases, and the suction resistance of the filter rod gradually decreases. In addition, the average suction resistance of the filter rod is also affected by the change in circumference during the production process, and is negatively correlated with the suction resistance.

[0040] Therefore, the online control of the filter rod's average suction resistance based on the V1 / VKDF adjustment amount calculated from the SPCD filter rod's average suction resistance control chart, which shows changes due to the corresponding average suction resistance trend, includes:

[0041] like Figure 2 As shown,

[0042] When obtaining the control chart of the average suction resistance of the filter rod of the SPCD system, which shows a change in the trend of the average suction resistance, determine whether there is a significant reverse deviation in the circumference of the filter rod. Specifically, when the suction resistance is observed to rise or fall in the control chart, first observe whether there is a significant reverse deviation in the circumference. If there is a deviation, check the circumference first.

[0043] If there is a significant reverse deviation, perform a circumferential adjustment operation; if the circumference shows a trend change, it is generally due to wear of the cloth belt, paper dust, or glue buildup on the cooling strip, in which case measures such as replacing the cloth belt and cleaning the smoke gun are required.

[0044] If there is no obvious reverse deviation, the corresponding V1 / VKDF adjustment amount is calculated based on the relationship model between V1 / VKDF and the average suction resistance of the filter rod, according to the control chart of the average suction resistance of the filter rod. V1 / VKDF is then adjusted based on this adjustment amount to control the average suction resistance of the filter rod online. Specifically, if the circumference is normal, V1 / VKDF adjustment is considered. The adjustment is made according to the control chart of 5 branches in the SPCD system, combined with the two discrepancy criteria of SPC (one sub-point falls outside 3σ, and 9 consecutive points fall on the same side of the center line). The adjustment rule is based on the relationship model between V1 / VKDF and the average suction resistance of the filter rod to calculate the adjustment amount, and to accurately control the average suction resistance of the filter rod online.

[0045] In one embodiment, the online control method for filter rod suction resistance stability further includes: when production reaches the end of the material production, it is necessary to wait until the fiber bundle is completely produced before controlling the splicing of the fiber bundle with the waiting area to continue production, so as to avoid moving the position before the end of production, which would cause fluctuations in the average suction resistance.

[0046] Step S2: Based on the fluctuation of suction resistance stability, online control of the standard deviation of filter rod suction resistance is carried out by standardizing process parameters and equipment maintenance.

[0047] In one embodiment, the standard deviation of the suction resistance is affected by key process parameters of the molding machine and equipment maintenance. During production, it is necessary to comprehensively determine the causes of fluctuations in suction resistance stability and take control measures. Therefore, a combination of standardized process parameter adjustment and equipment maintenance methods is used to control the standard deviation of the filter rod's suction resistance online.

[0048] In one specific embodiment, according to DOE, the key parameters for filter rod suction resistance stability are delivery air pressure and opening / closing air pressure. There is an interaction between the two. When the opening / closing air pressure is high, the setting of delivery air pressure has a significant impact on the filter rod suction resistance stability. During production, the key parameters need to be adjusted according to the fluctuation of filter rod suction resistance stability.

[0049] The standardized adjustment methods for the process parameters include:

[0050] Based on the DOE standardized key process parameter calculation model, the corresponding key parameters for filter rod suction resistance stability are calculated according to the mean fluctuation data of suction resistance and the standard deviation fluctuation data of filter rod suction resistance, so as to make adjustments according to the key parameters for filter rod suction resistance stability; wherein, the key parameters for filter rod suction resistance stability include: delivery air pressure and opening air pressure.

[0051] In one embodiment, the equipment maintenance method includes one or more of the following: performing a three-stage opening channel herringbone air duct inlet cleaning operation, a V2 roller and V3 roller and the area between them cleaning fly residue cleaning operation, a conveying nozzle cleaning operation, and a fan filter screen cleaning operation.

[0052] Specifically, the cleaning operation for the three-stage opening channel herringbone air duct inlet is as follows: If any opening abnormalities are observed (more than 3 vertical lines, large vertical lines, edge shaking), clean during shift change maintenance. The cleaning operation for fly residue residue in the area between the V2 and V3 rollers is as follows: clean every hour during shutdown and during shift change maintenance. The cleaning operation for the conveying nozzles is as follows: clean at least twice per shift. The cleaning operation for the blower filter is as follows: The opening air pressure is provided by the internal blower, and its pressure will gradually decrease and then suddenly drop over time due to dust accumulation or blockage of the filter. Regular cleaning is required, and it should be checked once per shift. If the opening air pressure exceeds the process range while the blower speed remains constant, stop the machine and clean the blower filter.

[0053] To better describe the online control method for filter rod suction resistance stability, specific embodiments are provided;

[0054] Example 1: Online control method for filter rod suction resistance stability.

[0055] The method includes:

[0056] Online control of average suction resistance: When the KDF4 molding machine produces 25#B filter rods, the model of average suction resistance and V1 / VKDF is that if V1 / VKDF increases or decreases by 0.001, the suction resistance increases or decreases by 7 Pa. According to this rule, the control chart of the average suction resistance of filter rods (5 rods per group) in the SPCD system is used. Combined with the two discrepancy criteria of SPC, when the average suction resistance is observed to rise or fall in the control chart, first observe whether there is a significant reverse deviation in the circumference. If there is a deviation, check the circumference first. If the circumference is normal, calculate the adjustment amount of the average suction resistance and adjust V1 / VKDF in time. Through the application of this method, the range of average suction resistance of filter rods is less than 50 Pa, and the stability is significantly improved.

[0057] Online control of suction resistance standard deviation: Based on DOE and SPC theory, combined with actual production operation and equipment maintenance, the KDF4 molding machine, when producing 25#B filter rods, reduces the standard deviation of filter rod suction resistance by 6% by adjusting key process parameters (when the opening air pressure = 120, the suction resistance standard deviation difference is small when the conveying jet is set to 23 or 25; when the opening air pressure = 150, the suction resistance standard deviation reaches the lowest value when the conveying jet is set to 23, and the difference from the setting of 25 is large) and combined with equipment cleaning and maintenance (herringbone-shaped air duct in the three-stage opening channel, fly shavings residue in the area between the V2 and V3 rollers, cleaning of the conveying nozzles, and cleaning of the fan filter screen), thus improving the stability of filter rod suction resistance.

[0058] This embodiment improves the stability of cigarette draw resistance by implementing this new online control method for filter rod draw resistance stability, thereby reducing the fluctuation of the average draw resistance of the filter rod and lowering the standard deviation of the draw resistance. This enhances the quality of the filter rod and provides a guarantee for the stability of cigarette draw resistance from the source.

[0059] Similar to the principles of the above embodiments, the present invention provides an online control system for the stability of filter rod suction resistance.

[0060] The following specific embodiments are provided in conjunction with the accompanying drawings:

[0061] like Figure 3 A schematic diagram of an online control system for filter rod suction resistance stability is shown in an embodiment of the present invention.

[0062] The system includes:

[0063] The filter rod suction resistance average value control module 31 is used to control the filter rod suction resistance average value online based on the V1 / VKDF adjustment amount calculated by the SPCD filter rod suction resistance average value control chart which changes according to the corresponding suction resistance average value trend.

[0064] The filter rod suction resistance standard deviation control module 32 is used to control the filter rod suction resistance standard deviation online based on the fluctuation of suction resistance stability, using standardized adjustment of process parameters and equipment maintenance methods.

[0065] Since the implementation principle of the filter rod suction resistance stability online control system has been described in the previous embodiments, it will not be repeated here.

[0066] In one embodiment, the method of calculating the V1 / VKDF adjustment amount based on the SPCD filter rod suction resistance average control chart that changes according to the corresponding suction resistance average trend includes: based on the constructed relationship model between V1 / VKDF and the filter rod suction resistance average, outputting the corresponding V1 / VKDF adjustment amount according to the SPCD filter rod suction resistance average control chart that changes according to the corresponding suction resistance average trend, and adjusting V1 / VKDF based on the V1 / VKDF adjustment amount to perform online control of the filter rod suction resistance average; wherein, the relationship model between V1 / VKDF and the filter rod suction resistance average is constructed based on the SPC discrepancy criterion.

[0067] In one embodiment, the relationship model between V1 / VKDF and the average suction resistance of the filter rod is constructed by two discrimination criteria in the SPC discrimination criteria, so that the average suction resistance of the filter rod after adjusting V1 / VKDF according to the output V1 / VKDF adjustment amount conforms to the two discrimination criteria; wherein, the two discrimination criteria include: the sub-point falls outside 3σ and 9 consecutive points fall on the center line.

[0068] In one embodiment, the online control of the filter rod's average suction resistance based on the V1 / VKDF adjustment amount calculated from the SPCD filter rod's average suction resistance control chart, which shows a change in the corresponding average suction resistance trend, includes: when the SPCD system's filter rod's average suction resistance control chart showing a change in the corresponding average suction resistance trend is obtained, determining whether the circumference of the filter rod has a significant reverse deviation; if there is no significant reverse deviation, then based on the relationship model between V1 / VKDF and the filter rod's average suction resistance, calculating the corresponding V1 / VKDF adjustment amount according to the filter rod's average suction resistance control chart, and adjusting V1 / VKDF based on the V1 / VKDF adjustment amount to perform online control of the filter rod's average suction resistance; if there is a significant reverse deviation, performing a circumference change adjustment operation.

[0069] In one embodiment, the equipment maintenance method includes one or more of the following: performing a three-stage opening channel herringbone air duct inlet cleaning operation, a V2 roller and V3 roller and the area between them cleaning fly residue cleaning operation, a conveying nozzle cleaning operation, and a fan filter screen cleaning operation.

[0070] In one embodiment, the online control method for filter rod suction resistance stability further includes: when production reaches the end of the material production, it is necessary to wait until the fiber bundle is completely produced before controlling the splicing of the fiber bundle with the waiting area to continue production.

[0071] like Figure 4 A schematic diagram of the structure of the filter rod suction resistance stability online control terminal 40 in an embodiment of the present invention is shown.

[0072] The filter rod suction resistance stability online control terminal 40 includes: a memory 41 and a processor 42. The memory 41 is used to store computer programs; the processor 42 runs the computer programs to implement, for example, Figure 1The method for online control of filter rod suction resistance stability.

[0073] Optionally, the number of memories 41 can be one or more, and the number of processors 42 can be one or more. Figure 4 Each example is taken as an instance.

[0074] Optionally, the processor 42 in the filter rod suction resistance stability online control terminal 40 will perform the following according to... Figure 1 The steps described involve loading one or more instructions corresponding to the process of an application into memory 41, and having the processor 42 run the application stored in the first memory 41, thereby achieving the following: Figure 1 The various functions in the online control method for filter rod suction resistance stability.

[0075] Optionally, the memory 41 may include, but is not limited to, high-speed random access memory and non-volatile memory. For example, one or more disk storage devices, flash memory devices, or other non-volatile solid-state storage devices; the processor 42 may include, but is not limited to, a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0076] Optionally, the processor 42 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0077] The present invention also provides a computer-readable storage medium storing a computer program, wherein the computer program, when executed, implements as follows: Figure 1 The illustrated method describes an online control method for the stability of filter rod suction resistance. The computer-readable storage medium may include, but is not limited to, floppy disks, optical disks, CD-ROMs (Read-Only Optical Disk Memory), magneto-optical disks, ROMs (Read-Only Memory), RAMs (Random Access Memory), EPROMs (Erasable Programmable Read-Only Memory), EEPROMs (Electrically Erasable Programmable Read-Only Memory), magnetic cards or optical cards, flash memory, or other types of media / machine-readable media suitable for storing machine-executable instructions. The computer-readable storage medium may be a product not connected to a computer device or a component used in a computer device.

[0078] In summary, the filter rod suction resistance stability online control method, system, terminal, and medium of this invention, combined with the existing online detection SPCD system during the production process, precisely adjusts the filter rod suction resistance average value based on the V1 / VKDF adjustment amount calculated from the SPCD filter rod suction resistance average value control chart that shows the change in the corresponding suction resistance average value trend. This reduces the number of adjustments and prevents over-adjustment and under-adjustment, improving the stability of the filter rod suction resistance average value. Furthermore, it reduces the difference in the average suction resistance values ​​between groups within a single yarn bundle, greatly benefiting the overall stability of the filter rod. Moreover, for the standard deviation of filter rod suction resistance within a group, a combination of standardized adjustment of process parameters and equipment maintenance is used, providing operators with a new method in actual production, reducing ineffective adjustments, and significantly lowering the standard deviation of filter rod suction resistance. Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0079] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for online control of filter rod suction resistance stability, characterized in that, The method includes: Based on the constructed relationship model between V1 / VKDF and the average suction resistance of the filter rod, the corresponding V1 / VKDF adjustment amount is output according to the SPCD filter rod suction resistance average control chart that changes due to the trend of the corresponding suction resistance average. Based on this V1 / VKDF adjustment amount, V1 / VKDF is adjusted to control the average suction resistance of the filter rod online. The relationship model between V1 / VKDF and the average suction resistance of the filter rod is obtained by training a historical data training set. The historical data training set includes SPCD filter rod suction resistance average change data that meet two SPC discrepancy criteria and the corresponding V1 / VKDF values. The two SPC discrepancy criteria include a sub-point falling outside 3σ and nine consecutive points falling on the same side of the center line. Based on the fluctuation of suction resistance stability, the standard deviation of filter rod suction resistance is controlled online by adopting standardized adjustment of process parameters and equipment maintenance methods; The standardized adjustment method of the process parameters includes: based on the DOE standardized key process parameter calculation model, calculating the corresponding key parameters of filter rod suction resistance stability according to the average fluctuation data of suction resistance and the standard deviation fluctuation data of filter rod suction resistance, and adjusting based on the key parameters of filter rod suction resistance stability, which include the delivery air jet and the opening and closing air pressure. The equipment maintenance method includes: when the fan speed remains constant and the opening and closing air pressure exceeds the process range, the fan filter screen is cleaned after shutdown.

2. The online control method for filter rod suction resistance stability according to claim 1, characterized in that, The relationship model between V1 / VKDF and the average suction resistance of the filter rod is constructed by two discrimination criteria in the SPC discrimination criteria, so that the average suction resistance of the filter rod after adjusting V1 / VKDF according to the output V1 / VKDF adjustment amount meets the two discrimination criteria. The two discrepancy criteria include: the sub-point falling outside 3σ and nine consecutive points falling on the center line.

3. The online control method for filter rod suction resistance stability according to claim 1, characterized in that, The online control of the filter rod's average suction resistance based on the V1 / VKDF adjustment amount calculated from the SPCD filter rod average suction resistance control chart, which is generated by the change in the corresponding average suction resistance trend, includes: When the average suction resistance control chart of the filter rod of the SPCD system changes with the corresponding trend of the average suction resistance, determine whether there is a significant reverse deviation in the circumference of the filter rod. If there is no obvious reverse deviation, the corresponding V1 / VKDF adjustment amount is calculated based on the relationship model between V1 / VKDF and the average value of filter rod suction resistance, according to the control chart of the average value of filter rod suction resistance. V1 / VKDF is then adjusted based on the adjustment amount to control the average value of filter rod suction resistance online. If there is a significant deviation in the opposite direction, perform a circumferential adjustment operation.

4. The online control method for filter rod suction resistance stability according to claim 1, characterized in that, The equipment maintenance methods include one or more of the following: cleaning the herringbone air duct opening of the three-stage opening channel, cleaning the fly shavings residue in the area between the V2 and V3 rollers, cleaning the conveying nozzles, and cleaning the fan filter.

5. The online control method for filter rod suction resistance stability according to claim 1, characterized in that, The online control method for filter rod suction resistance stability also includes: When production reaches the end of the material stage, it is necessary to wait until the entire tow package is produced before controlling the splicing of the tow packages in the waiting area to continue production.

6. An online control system for filter rod suction resistance stability, characterized in that, The system includes: The filter rod suction resistance mean control module is used to output the corresponding V1 / VKDF adjustment amount based on the constructed relationship model between V1 / VKDF and the filter rod suction resistance mean, and according to the SPCD filter rod suction resistance mean control chart that changes due to the trend of the corresponding suction resistance mean. Based on the V1 / VKDF adjustment amount, V1 / VKDF is adjusted to control the filter rod suction resistance mean online. The relationship model between V1 / VKDF and the filter rod suction resistance mean is obtained by training a historical data training set. The historical data training set includes SPCD filter rod suction resistance mean change data that meet two SPC discrepancy criteria and the corresponding V1 / VKDF values. The two SPC discrepancy criteria include a sub-point falling outside 3σ and nine consecutive points falling on the same side of the center line. The filter rod suction resistance standard deviation control module is used to control the filter rod suction resistance standard deviation online based on the suction resistance stability fluctuation, using process parameter standardization adjustment and equipment maintenance methods. The process parameter standardization adjustment method includes: calculating the corresponding filter rod suction resistance stability key parameters based on the DOE standardized key process parameter calculation model, according to the suction resistance mean fluctuation data and the filter rod suction resistance standard deviation fluctuation data, and adjusting based on the filter rod suction resistance stability key parameters, including the delivery air pressure and the opening and closing air pressure. The equipment maintenance method includes: when the fan speed remains constant and the opening and closing air pressure exceeds the process range, the fan filter screen is cleaned after shutdown.

7. An online control terminal for filter rod suction resistance stability, characterized in that, include: Memory, used to store computer programs; A processor for executing the online control method for filter rod suction resistance stability as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The device contains a computer program that is executed by one or more processors to perform the method as described in any one of claims 1 to 5.

Images