CN115088858B - Perfuming control and instantaneous precision evaluation method for cigarette production line production and application - Google Patents
Perfuming control and instantaneous precision evaluation method for cigarette production line production and application Download PDFInfo
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- CN115088858B CN115088858B CN202210862504.9A CN202210862504A CN115088858B CN 115088858 B CN115088858 B CN 115088858B CN 202210862504 A CN202210862504 A CN 202210862504A CN 115088858 B CN115088858 B CN 115088858B
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/12—Steaming, curing, or flavouring tobacco
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a flavoring control and instantaneous precision evaluation method for cigarette production line production and application, wherein the method comprises the following steps: 1. instantaneous weight cumulant in the buffer of the upper computer, 2, calculate the proportion of perfuming in the historical time interval through the data in the buffer, 3, revise the instantaneous flowrate set point of perfuming according to proportion of perfuming, proportion of perfuming craft standard value, theoretical cumulant of perfuming and actual cumulant of perfuming in the historical time interval, 4, adopt the proportion of perfuming in the historical time interval to calculate the instantaneous precision of the perfuming process. The invention can improve the instantaneous precision of the perfuming process, reduce the instantaneous precision fluctuation problem caused by an instantaneous precision calculation method, and is beneficial to monitoring and evaluating quality indexes.
Description
Technical Field
The invention relates to a flavoring control and instantaneous precision evaluation method for cigarette production, which can be widely applied to the control and instantaneous precision evaluation of the flavoring process in the production of various brand cigarette production lines in the tobacco industry.
Background
At present, the industry mostly adopts an instantaneous precision calculation method taking instantaneous flow as a calculation reference, taking a silk-processing thread flavoring process as an example, the calculation principle is shown in fig. 1, and the formula is instantaneous precision = ((instantaneous flow of a flavoring flowmeter/instantaneous flow of main scale leaf threads) -set proportion)/set proportion. In a specific production control, the time (t) from the main scale to the feeding port of the perfuming roller is needed for the cut tobacco 1 ) And after the measurement is delayed to the same timing point, writing in the control program so as to enable the delayed cut tobacco flow signal to correspond to the output signal of the essence flowmeter.
However, any link in pipeline conveying, essence injection and material conveying can affect the consistency of the corresponding signals, and the delay time is mostly timed by an artificial stopwatch and cannot correspond to the millisecond-level acquisition time of data acquired by the bottom PLC. If the delay time deviation is large, the calculation result of the instantaneous precision is greatly deviated, and the uniformity of essence application and the internal quality of the cigarette are further influenced.
In order to solve the problems, a method for calculating the variation coefficient of the proportion of the feeding materials (aroma) is provided in 2016 type cigarette process specification: counting the material accumulation W of the electronic scale before feeding (perfuming) within 30 seconds every interval 1 And the cumulative amount W of the charging (incense) in the corresponding time delay x By using
To calculate the proportion C of the instant charge (fragrance) i The coefficient of variation of the proportion of the charge (fragrance) is as follows
Is calculated, wherein, CV δ The coefficient of variation (%) of the feed (flavor) ratio is expressed; c i The proportion (%) of the ith feeding (fragrance) is shown, i is 1,2, \ 8230;, the natural number of n;
the average (%) of the proportion of n charges (aroma) is expressed and the specification requires that each batch be taken continuously for the calculated C i Not less than 30 times.
It can be seen from the method for calculating the variation coefficient of the feeding (fragrance) ratio that an instantaneous value can be obtained every 30s after the production operation is stable, when the cigarettes are subjected to small-batch test sample feeding, the number of continuous collection points can be less than 30, and the reliability of statistical results is low under the condition that the accuracy requirement of instantaneous accuracy calculation results is very high. Meanwhile, the proportional variation coefficient of the feeding (fragrance) can be calculated after each batch of production is finished, and real-time online monitoring evaluation and process control of indexes cannot be realized.
Meanwhile, in the production control process, most of the flow meters or electronic belt weighers adopt PID controllers to track the instantaneous flow or the overall precision, and the charging (fragrance) pump is adjusted according to the tracking result. When the overall precision tracking adjustment of batches is adopted, the problem that the actual instantaneous fluctuation condition cannot be accurately reflected and the precision is not high exists. When instantaneous flow tracking is adopted, the PID-based regulation mode determines that oscillation can be generated in the correction process, and when a flowmeter or a proportioning scale and an electronic scale signal are calculated and tracked and regulated, the corresponding relation on the processing time needs to be ensured all the time, so that the overshoot phenomenon and the perfuming precision deviation can also be caused in the actual control process.
Disclosure of Invention
The invention aims to solve the defects of the prior art, provides a flavoring control and instantaneous precision evaluation method for producing a cigarette primary processing line and application thereof, so as to improve the instantaneous precision of the flavoring process and reduce the instantaneous precision fluctuation caused by an instantaneous precision calculation method, thereby being beneficial to monitoring and evaluating quality indexes.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a flavoring control and instantaneous precision evaluation method for cigarette production line production, which is characterized by comprising the following steps:
step 1: obtaining a flavoring proportion process standard value S of the cut tobacco of the current batch from a relational database of an upper computer;
and 2, step: recording the initial moment when the cut tobacco of the current batch passes through the main scale as t 0 (ii) a And obtaining an initial time t from the field PLC 0 Main scale instantaneous flow rate R (t) 0 )；
And 3, step 3: will be at an initial time t 0 The time from the start to the entry of the current batch of shredded tobacco into the perfuming drum is recorded as t 1 ；
And 4, step 4: perfuming pump from T 0 ＝t 0 +t 1 Starting at any moment, and conveying essence to the cut tobacco of the current batch;
and 5: regulating and controlling the flavoring flow by a flow meter, and calculating the initial time t of the current batch of cut tobacco in a field PLC 0 Set value T (T) = R (T + T) of perfuming instantaneous flow from start to any time T 1 )×S；
Step 6: transmitting a flavoring instantaneous flow set value T (T) of the current batch of cut tobacco at the current time T to a flavoring flow meter in a field PLC (programmable logic controller), so as to perform flavoring by utilizing a flavoring pump;
and 7: the instantaneous weight cumulant H (T-T) of the current batch of cut tobacco on the main scale in a historical time period is cached in a buffer of the upper computer; T-T represents the previous T period of the current T moment;
and 8: the perfuming cumulant J (T-T) of the current batch of cut tobacco in the historical time period, which is obtained from a perfuming flow meter by a field PLC, is cached in a buffer of the upper computer;
and step 9: calculating a perfuming ratio K (T-T) = J (T-T)/H (T-T) of the historical period;
step 10: acquiring the actual perfuming cumulative quantity W (t) of the cut tobacco of the current batch at the current time t from a field PLC;
step 11: acquiring the actual accumulated quantity V (t) of the main scale of the current batch of cut tobacco on the main scale at the current time t from a field PLC;
step 12: calculating the theoretical cumulative quantity U (t) = V (t) × S of perfuming of the cut tobacco of the current batch at the current time t;
step 13: in the perfuming process, different conditions are judged according to the instantaneous quantity and the cumulant, and the site PLC adjusts the instantaneous perfuming flow set value T (T) at the current T moment so as to keep the perfuming process stable:
if K (T-T) > S, W (T) > U (T), T (T) = R (T) × α × S;
if K (T-T) > S, W (T) < U (T), T (T) = R (T) × β × S;
if K (T-T) < S, W (T) < U (T), T (T) = R (T) × β × S;
if K (T-T) < S, W (T) > U (T), T (T) = R (T) × α × S;
wherein α and β represent two coefficients, respectively, and 1- | σ | < α <1;1< beta <1+ | sigma | with a standard tolerance of perfuming proportion process of 10 times;
step 14: calculating the instantaneous precision of the cut tobacco of the current batch at the current t moment in the flavoring process
For evaluation of the stability of the perfuming process control.
The invention relates to an electronic device comprising a memory and a processor, characterized in that the memory is used for storing a program for supporting the processor to execute the perfuming control and instantaneous accuracy evaluation method, and the processor is configured to execute the program stored in the memory.
The present invention relates to a computer-readable storage medium having a computer program stored thereon, wherein the computer program is adapted to perform the steps of the perfuming control and instantaneous accuracy assessment method when executed by a processor.
Compared with the prior art, the invention has the beneficial effects that:
1. the 4 judgment conditions based on the instantaneous quantity and the cumulant established by the invention can effectively control the fluctuation and the overshoot phenomenon generated in the adjusting process, and have important significance for improving the control precision of the flavoring process and the stability of the product quality.
2. The invention establishes a perfuming and charging instantaneous precision calculation method taking continuous short history period cumulant as a calculation reference, and replaces instantaneous flow of each time point with the continuous short history period cumulant, and designs a new instantaneous precision calculation method, thereby well solving the strict corresponding relation between flow signals required to be kept during the traditional instantaneous precision calculation and effectively avoiding the problem of inaccurate instantaneous precision caused by the corresponding deviation of the instantaneous flow signals. The instantaneous precision obtained by the method can be subjected to statistical analysis in real time in production, the mean value of all data points of a batch is not required to be calculated first, and the defect that a related statistical method in the cigarette process specification can only be used for post analysis is effectively overcome.
Drawings
FIG. 1 is a flow chart of the control of the perfuming process according to the prior art;
figure 2 is a flow chart of the present invention perfuming and flavoring data processing.
Detailed Description
In the embodiment, an perfuming control and instantaneous precision evaluation method for cigarette production line production is implemented by acquiring online real-time data and set values of formula parameters from a relational database of a lower computer PLC and an upper computer as shown in FIG. 2, and the method comprises the following steps:
step 1: obtaining a flavoring proportion process standard value S of the cut tobacco of the current batch from a relational database of an upper computer;
step 2: recording the initial moment when the current batch of cut tobacco passes through the main scale as t 0 (ii) a And obtaining an initial time t from the field PLC 0 Main scale instantaneous flow rate R (t) 0 )；
And step 3: will be at an initial time t 0 The time from the start to the entry of the current batch of shredded tobacco into the perfuming drum is recorded as t 1 ；
And 4, step 4: perfuming pump from T 0 ＝t 0 +t 1 Starting at any moment, and conveying essence to the cut tobacco of the current batch;
and 5: regulating and controlling the flavoring flow by a flow meter, and calculating the initial time t of the current batch of cut tobacco in a field PLC 0 Set value T (T) = R (T + T) of perfuming instantaneous flow from start to any time T 1 )×S；
Step 6: and transmitting the perfuming instantaneous flow set value T (T) of the cut tobacco of the current batch at the current time T to a perfuming flow meter in a field PLC (programmable logic controller), so as to perfume by using a perfuming pump. The refreshing time of T (T) is determined by the signal refreshing time of the main scale in the PLC;
and 7: the instantaneous weight cumulant H (T-T) of the current batch of cut tobacco on the main scale in the historical time period is cached in a buffer of the upper computer; T-T represents the previous T period at the current time T. In the actual production control, the time interval length of T is preferably set to 10-20 seconds;
and step 8: the perfuming cumulant J (T-T) of the current batch of cut tobacco in the historical time period, which is obtained from a perfuming flow meter by a field PLC, is cached in a Buffer (Buffer) of the upper computer;
and step 9: calculating the perfuming proportion K (T-T) = J (T-T)/H (T-T) in the historical period;
step 10: acquiring the actual perfuming cumulative quantity W (t) of the cut tobacco of the current batch at the current time t from a field PLC;
step 11: acquiring the actual accumulated quantity V (t) of the main scale of the current batch of cut tobacco on the main scale at the current time t from a field PLC;
step 12: calculating the theoretical cumulant U (t) = V (t) × S of the perfuming of the cut tobacco of the current batch at the current time t;
step 13: in the perfuming process, different conditions are judged according to the instantaneous quantity and the cumulant, and the site PLC adjusts the instantaneous perfuming flow set value T (T) at the current T moment so as to keep the perfuming process stable:
if K (T-T) > S, W (T) > U (T), T (T) = R (T) × α × S;
if K (T-T) > S, W (T) < U (T), T (T) = R (T) × β × S;
if K (T-T) < S, W (T) < U (T), T (T) = R (T) × β × S;
if K (T-T) < S, W (T) > U (T), T (T) = R (T) × α × S;
wherein α and β represent two coefficients, respectively, and 1- | σ | < α <1;1< beta <1+ | sigma | with a standard tolerance of perfuming proportion process of 10 times. In the specific implementation, under the condition that the standard tolerance of the flavoring proportion process is +/-0.5%, the suggested value range of alpha is 0.95-0.97, and the suggested value range of beta is 1.03-1.05;
step 14: calculating the instantaneous precision of the cut tobacco of the current batch at the current t moment in the flavoring process
For evaluation of the stability of the perfuming process control. When c (t) is used for quality index evaluation in actual production, the acquisition time interval can be set arbitrarily according to needs, and the acquisition time interval is generally recommended to be set to 10-20 seconds.
In this embodiment, an electronic device comprises a memory for storing a program that enables a processor to execute the perfuming control and transient accuracy assessment method, and a processor configured for executing the program stored in the memory.
In this embodiment, a computer-readable storage medium stores a computer program, and the computer program is executed by a processor to execute the steps of the perfuming control and instantaneous precision evaluation method.
Claims (3)
1. A perfuming control and instantaneous accuracy evaluation method for cigarette production line production is characterized by comprising the following steps:
step 1: obtaining a flavoring proportion process standard value S of the cut tobacco of the current batch from a relational database of an upper computer;
step 2: recording the initial moment when the cut tobacco of the current batch passes through the main scale as t 0 (ii) a And obtaining an initial time t from the field PLC 0 Main scale instantaneous flow rate R (t) 0 )；
And step 3: will be at an initial time t 0 The time from the beginning to the time when the current batch of cut tobacco enters the flavoring roller is recorded as t 1 ；
And 4, step 4: perfuming pump from T 0 ＝t 0 +t 1 Starting at any moment, and conveying essence to the cut tobacco of the current batch;
and 5: regulating and controlling the flavoring flow by a flow meter, and calculating the initial time t of the current batch of cut tobacco in a field PLC 0 Set value T (T) = R (T + T) of perfuming instantaneous flow from start to any time T 1 )×S；
Step 6: transmitting a flavoring instantaneous flow set value T (T) of the current batch of cut tobacco at the current time T to a flavoring flow meter in a field PLC (programmable logic controller), so as to perform flavoring by utilizing a flavoring pump;
and 7: the instantaneous weight cumulant H (T-T) of the current batch of cut tobacco on the main scale in a historical time period is cached in a buffer of the upper computer; T-T represents the previous T period of the current time T;
and 8: the perfuming cumulant J (T-T) of the current batch of cut tobacco in the historical time period, which is obtained from a perfuming flow meter by a field PLC, is cached in a buffer of the upper computer;
and step 9: calculating a perfuming ratio K (T-T) = J (T-T)/H (T-T) of the historical period;
step 10: acquiring the actual perfuming cumulative quantity W (t) of the cut tobacco of the current batch at the current time t from a field PLC;
step 11: acquiring the actual accumulated quantity V (t) of the main scale of the current batch of cut tobacco on the main scale at the current time t from a field PLC;
step 12: calculating the theoretical cumulative quantity U (t) = V (t) × S of perfuming of the cut tobacco of the current batch at the current time t;
step 13: in the perfuming process, different conditions are judged according to the instantaneous quantity and the cumulant, and the site PLC adjusts a perfuming instantaneous flow set value T (T) at the current time T so as to keep the perfuming process stable:
if K (T-T) > S, W (T) > U (T), T (T) = R (T) × α × S;
if K (T-T) > S, W (T) < U (T), T (T) = R (T) × β × S;
if K (T-T) < S, W (T) < U (T), T (T) = R (T) × β × S;
if K (T-T) < S, W (T) > U (T), T (T) = R (T) × α × S;
wherein α and β represent two coefficients, respectively, and 1- | σ | < α <1;1< beta <1+ | sigma | with a standard tolerance of perfuming proportion process of 10 times;
step 14: calculating the instantaneous precision of the cut tobacco of the current batch at the current t moment in the flavoring process
For evaluation of the stability of the perfuming process control.
2. An electronic device comprising a memory and a processor, wherein the memory is used for storing a program that enables the processor to execute the perfuming control and instant precision assessment method according to claim 1, and the processor is configured for executing the program stored in the memory.
3. A computer-readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, performs the steps of the perfuming control and instantaneous accuracy assessment method according to claim 1.
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1414545A (en) * | 1973-12-31 | 1975-11-19 | Brown & Williamson Tobacco | Deposition of flavourant on tobacco |
| CN102008121B (en) * | 2010-12-13 | 2012-09-19 | 山东中烟工业有限责任公司 | Linear correction control method of perfuming precision error in tobacco processing |
| CN102578693B (en) * | 2012-02-16 | 2014-01-08 | 河南中烟工业有限责任公司 | Method for controlling tobacco flavoring/feeding proportion precision |
| CN102626255B (en) * | 2012-04-19 | 2014-01-15 | 四川烟草工业有限责任公司成都分厂 | Control method for synthesizing tobacco primary processing flavoring accuracy calculated value |
| CN107510089B (en) * | 2017-08-24 | 2019-08-13 | 河北中烟工业有限责任公司 | The method of accuracy of leaf feeding is improved in a kind of production of tobacco cutting |
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