CN115039905A - Method for removing stems in finished cut tobacco based on fusion of flexible winnowing and image recognition - Google Patents
Method for removing stems in finished cut tobacco based on fusion of flexible winnowing and image recognition Download PDFInfo
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- CN115039905A CN115039905A CN202210707596.3A CN202210707596A CN115039905A CN 115039905 A CN115039905 A CN 115039905A CN 202210707596 A CN202210707596 A CN 202210707596A CN 115039905 A CN115039905 A CN 115039905A
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 107
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000004927 fusion Effects 0.000 title claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 16
- 238000003384 imaging method Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 235000019504 cigarettes Nutrition 0.000 description 24
- 239000012535 impurity Substances 0.000 description 18
- 239000000047 product Substances 0.000 description 10
- 238000005096 rolling process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000001953 sensory effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012369 In process control Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000010965 in-process control Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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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
- A24B5/00—Stripping tobacco; Treatment of stems or ribs
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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
- A24B5/00—Stripping tobacco; Treatment of stems or ribs
- A24B5/16—Other treatment of stems or ribs, e.g. bending, chopping, incising
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B11/00—Arrangement of accessories in apparatus for separating solids from solids using gas currents
- B07B11/02—Arrangement of air or material conditioning accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
- B07C5/3422—Sorting according to other particular properties according to optical properties, e.g. colour using video scanning devices, e.g. TV-cameras
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/36—Sorting apparatus characterised by the means used for distribution
- B07C5/361—Processing or control devices therefor, e.g. escort memory
- B07C5/362—Separating or distributor mechanisms
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Manufacture Of Tobacco Products (AREA)
Abstract
The invention discloses a method for removing stems from finished cut tobacco based on fusion of flexible air separation and image recognition. Removing the rough stems with the density attribute greatly different from the cut tobacco in the finished cut tobacco in the primary air separation; in secondary air separation, separating the finished cut tobacco after primary air separation into two parts of pure cut tobacco and a cut tobacco mixture (cut tobacco and thin stem with small density attribute difference); in the step of removing the stems by image recognition, recognizing and removing the fine stems in the tobacco shred mixture subjected to secondary air separation; and finally, combining and outputting the pure cut tobaccos subjected to the secondary air separation and the image recognition to achieve the purpose of removing the stems of the finished cut tobaccos. The method fully utilizes the advantages of flexible air separation and image recognition for removing the stems, is suitable for large-scale production, can effectively remove the stems in the finished cut tobacco, and can reduce the cut tobacco loss in the process of removing the stems as much as possible, thereby improving the use value and the internal quality of the finished cut tobacco.
Description
Technical Field
The invention belongs to the technical field of tobacco processing, and particularly relates to a method for removing stems in finished cut tobacco based on fusion of flexible air separation and image recognition.
Background
The finished cut tobacco is cut tobacco which is formed by a plurality of single material cigarettes according to a certain formula and reaches the rolling requirement through a series of processing processes. The stem sticks refer to strip-shaped tobacco stems with smaller sizes in tobacco shreds, and are formed in the tobacco shred processing process by stems and veins in the tobacco shreds.
The cigarette containing the stem sticks is easy to cause the phenomena of the puncture and the air leakage of the cigarette, even the phenomena of the opening burst of a combustion end and the like, thereby not only influencing the combustibility of the cigarette and the stability of the physical measurement index, but also influencing the sensory quality of the whole cigarette. Therefore, stem control in cigarette products has been a key and difficult point in process control for cigarette enterprises.
At present, cigarette enterprises mainly remove stems in tobacco shreds in a winnowing mode, wherein the content of the stems in the cigarettes is reduced by measures such as adjusting the ventilation quantity of a stem box pore plate in a tobacco shred smoking forming system of a cigarette making unit in a rolling process. However, as the removal amount of the stems is increased, the content of available cut tobacco in the stems is also increased, so that the consumption of the cut tobacco is increased, and the effective utilization rate of the cut tobacco is reduced.
The image recognition impurity removal is a hotspot and focus of the current tobacco foreign matter impurity removal technology research, and has the characteristics of accurate impurity recognition, strong removal capability and the like, but the impurity removal process needs to be spread thin, and the processing capability is limited; meanwhile, when the impurity content is high, the impurity removal effect is not ideal by adopting image recognition.
Therefore, in the large-scale production process of cigarette enterprises, how to effectively remove the stems in the finished cut tobacco and reduce the cut tobacco consumption in the process as much as possible becomes an urgent problem to be solved.
The present invention has been made to solve the above problems.
Disclosure of Invention
The removal of the stems from the finished cut tobacco is a key link for improving the purity of the cut tobacco and ensuring the stable quality of cigarette products. The invention aims to provide a method for removing stems from finished cut tobaccos based on fusion of flexible winnowing and image recognition aiming at the defects of the prior art, which can effectively remove the stems from the finished cut tobaccos, is suitable for large-scale continuous production, does not basically damage and consume the cut tobaccos, further improves the use value and the internal quality of the finished cut tobaccos, and has obvious practical significance for improving the purity of the finished cut tobaccos, improving the processing technology level of cigarettes and ensuring the stable quality of the cigarette products.
The purpose of the invention is realized by the following technical scheme.
The invention discloses a method for removing stems from finished cut tobacco based on fusion of flexible air separation and image recognition. In the primary air separation, removing coarse stems in finished cut tobacco with a density attribute greatly different from that of the cut tobacco; in secondary air separation, separating the finished cut tobacco after primary air separation into two parts of pure cut tobacco and a cut tobacco mixture (cut tobacco and thin stem with small density attribute difference); in the step of removing the stems by image recognition, recognizing and removing the fine stems in the tobacco shred mixture subjected to secondary air separation; and finally, combining and outputting the pure cut tobaccos subjected to the secondary air separation and the image recognition to achieve the purpose of removing the stems of the finished cut tobaccos.
Specifically, the method for removing the stems in the finished cut tobacco based on the fusion of flexible air separation and image recognition mainly comprises three steps of primary air separation, secondary air separation and image recognition removal;
the primary air separation step is removal of primary stems, and the primary stems in finished tobacco shreds are removed by adjusting the air speed of air separation to obtain a primary tobacco shred mixture so as to reduce the pressure of removing the primary stems in the subsequent image identification step;
the second-stage winnowing step is to separate the cut tobacco, and the first-stage cut tobacco mixture obtained after the first-stage winnowing is separated into a first part of cut tobacco and a second-stage cut tobacco mixture by adjusting the winnowing air speed, wherein the second-stage cut tobacco mixture is a mixture of the cut tobacco and a second-stage stem so as to reduce the processing amount of subsequent image identification;
the image identification step is the removal of secondary stems, firstly, the secondary cut tobacco mixture is spread and dispersed in a background, then an image is collected through a color scanning camera, the collected image is analyzed and processed to identify the secondary stems in the image based on the difference of the cut tobacco and the secondary stems in color and shape characteristics, and finally the identified secondary stems are removed to obtain a second part of cut tobacco;
and merging the first part of cut tobacco subjected to the secondary winnowing and the second part of cut tobacco subjected to the image recognition, and entering a subsequent process.
The first-level stem sticks are thick stem sticks with density attributes greatly different from tobacco shreds. The second-level stem sticks are fine stem sticks with density attributes smaller than the difference between the density attributes and the tobacco shreds.
Preferably, the wind speed adjusting range in the primary winnowing step is 5.0-8.5 m/s.
Preferably, the wind speed adjusting range in the secondary winnowing step is 2.5-5.0 m/s;
preferably, the processing capacity for removing the secondary stem slivers in the image identification step is more than or equal to 300kg/h, the high-definition imaging frame rate of the color scanning camera is more than or equal to 250 frames/s, the secondary stem sliver identification rate is more than or equal to 90%, and the tobacco shred error identification rate is less than or equal to 3%.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the flexible air separation and the image recognition to remove the stems in the finished cut tobacco, fully exerts the advantages of two impurity removal technologies, utilizes the characteristics that the air separation impurity removal process is suitable for large-scale processing and can effectively remove the coarse stems, and combines the characteristics that the image recognition can accurately remove the fine stems, overcomes the defect that the current cigarette enterprises only adopt the air separation to remove the coarse stems, and also solves the problem that the image recognition processing capacity is limited, thereby effectively and comprehensively removing the coarse and fine stems in the finished cut tobacco and simultaneously remarkably reducing the cut tobacco consumption in the impurity removal process.
2. The invention adopts the flexible air separation and the image recognition to remove the stems in the finished cut tobacco, and skillfully sets three key processing links of primary air separation, secondary air separation and image recognition impurity removal. The primary air separation aims at removing coarse stems and reducing pressure for subsequent image identification and impurity removal; the secondary air separation aims at separating pure tobacco shreds, so that the processing capacity of subsequent image recognition and impurity removal is greatly reduced; and then the advantages of two impurities are fully exerted, the respective defects are well made up, and the organic combination and perfect fusion of flexible winnowing and image recognition impurity removal are effectively realized.
Drawings
FIG. 1 is a schematic diagram of the present invention in its application to the existing finished cut tobacco processing flow;
fig. 2 is a schematic view of the process flow for removing the cut tobacco stem sticks of the finished product.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, which are not intended to limit the technical scope of the present invention.
Example 1: influence of the invention on the removal effect of the finished cut tobacco stems
Sample preparation: 500kg of finished cut tobacco of certain cigarette specification, wherein the content of stems is 4.48% (detected by a stem content tester in SST-2 type cut tobacco).
Processing 500kg of finished tobacco shreds according to the steps shown in figure 2, wherein the air speed of the primary air separation impurity removal process is designed to be 6 m/s; the air speed of the second-stage air separation process is designed to be 3 m/s; the key part of the image identification impurity removing equipment is a color scanning camera, the background is black, a white light source is selected, the high-definition imaging frame rate is 300 frames/s, and the identification elements are mainly colors and outline areas.
The stem removal effect of the finished cut tobacco is analyzed based on the method, and the result is shown in table 1.
Table 1 influence of the invention on the removal of cut tobacco stems from finished tobacco
As can be seen from table 1, the stem in the finished cut tobacco is removed by the method, the stem removal rate is 40.89% and 54.55% in the primary air separation impurity removal process and the image recognition impurity removal process, respectively, and the total stem removal rate reaches 95.44%, which shows that the method has a significant effect on removing the stems of the finished cut tobacco. Compared with the traditional method that the stem rejection rate of finished cut tobacco on a cigarette making machine set is generally about 65 percent (or on the basis of simultaneously rejecting part of available cut tobacco), the method has obvious advantages and application values in finished cut tobacco stem rejection.
Example 2: the influence of the invention on the consumption of the rolling process and the product quality
The finished cut tobacco from which the stem is removed in example 1 according to the present invention is further rolled by a subsequent cigarette making machine as shown in fig. 1 to be processed into cigarettes, the quality of the rolling process and the quality of the products are evaluated, and comparative analysis is performed with respect to the case where the present invention is not used, and the results are shown in table 2.
TABLE 2 Effect of the invention on the quality of the rolling process and the quality of the product
| Finished cut tobacco | Tobacco shred consumption in rolling process | Rejection rate of unqualified cigarettes in rolling process | Product sensory quality fluctuations |
| Without treatment according to the invention | 33.25 kg/case | 0.37％ | Less than or equal to 0.5 minutes |
| By treatment of the invention | 32.93 kg/box | 0.12％ | Less than or equal to 0.3 min |
As can be seen from Table 2, the tobacco shred consumption in the cigarette making process is reduced, the unqualified cigarette ratio in the cigarette making process is reduced, and the sensory quality stability of the cigarette product is improved. The stem sticks in the finished cut tobacco are effectively removed, so that the processing quality of the subsequent rolling procedure and the quality stability of the final product are improved.
By combining the embodiment 1 and the embodiment 2, the stem sticks in the finished cut tobacco can be effectively and comprehensively removed, the purity of the finished cut tobacco is improved, the use value of the finished cut tobacco is improved, the loss of the cut tobacco in the subsequent rolling process is reduced, the sensory quality stability of the product is improved, the economic benefit of enterprises is enhanced, and the method has good application prospect and practical significance.
Claims (4)
1. A method for removing stems in finished cut tobacco based on fusion of flexible air separation and image recognition is characterized by comprising three steps of primary air separation, secondary air separation and image recognition removal;
the primary air separation step is to remove primary stems, and the primary stems in the finished tobacco shreds are removed by adjusting the air speed of air separation to obtain a primary tobacco shred mixture;
the second-stage winnowing step is to separate the cut tobacco, and the first-stage cut tobacco mixture obtained after the first-stage winnowing is separated into a first part of cut tobacco and a second-stage cut tobacco mixture by adjusting the winnowing air speed, wherein the second-stage cut tobacco mixture is a mixture of cut tobacco and second-stage stem;
the image identification step is the removal of secondary stems, firstly, the secondary cut tobacco mixture is spread and dispersed in a background, then an image is collected through a color scanning camera, the collected image is analyzed and processed to identify the secondary stems in the image based on the difference of the cut tobacco and the secondary stems in color and shape characteristics, and finally the identified secondary stems are removed to obtain a second part of cut tobacco;
and merging the first part of cut tobacco subjected to the secondary winnowing and the second part of cut tobacco subjected to the image recognition, and entering a subsequent process.
2. The method as claimed in claim 1, wherein the wind speed adjustment range in the primary air separation step is 5.0m/s to 8.5 m/s.
3. The method as claimed in claim 1, wherein the wind speed adjustment range in the secondary winnowing step is 2.5m/s to 5.0 m/s.
4. The method according to claim 1, wherein the processing capacity for removing secondary stems in the image recognition step is more than or equal to 300kg/h, the high-definition imaging frame rate of the color scanning camera is more than or equal to 250 frames/s, the secondary stem recognition rate is more than or equal to 90%, and the tobacco shred error recognition rate is less than or equal to 3%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210707596.3A CN115039905A (en) | 2022-06-21 | 2022-06-21 | Method for removing stems in finished cut tobacco based on fusion of flexible winnowing and image recognition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210707596.3A CN115039905A (en) | 2022-06-21 | 2022-06-21 | Method for removing stems in finished cut tobacco based on fusion of flexible winnowing and image recognition |
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| CN115039905A true CN115039905A (en) | 2022-09-13 |
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| CN202210707596.3A Pending CN115039905A (en) | 2022-06-21 | 2022-06-21 | Method for removing stems in finished cut tobacco based on fusion of flexible winnowing and image recognition |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11944116B1 (en) | 2023-02-13 | 2024-04-02 | China Tobacco Yunnan Industrial Co., Ltd. | Device and method for removing unwanted objects from cut tobacco in a cut tobacco production line |
| US12011031B1 (en) | 2023-02-21 | 2024-06-18 | China Tobacco Yunnan Industrial Co., Ltd. | Device for removing stems in a cigarette making process and a method for removing the stems |
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|---|---|---|---|---|
| CN1593264A (en) * | 2004-07-06 | 2005-03-16 | 王训明 | Peduncle eliminating method from shredded tobacco |
| CN205128412U (en) * | 2015-11-04 | 2016-04-06 | 智思控股集团有限公司 | High -efficient pipe tobacco winnowing equipment |
| CN208303239U (en) * | 2018-04-13 | 2019-01-01 | 红云红河烟草(集团)有限责任公司 | Obstruct the multistage pneumatic separation case of label in a kind of tobacco shred |
| CN113533349A (en) * | 2021-07-19 | 2021-10-22 | 吴玉生 | Intelligent automatic tobacco shred impurity detecting and removing system |
-
2022
- 2022-06-21 CN CN202210707596.3A patent/CN115039905A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1593264A (en) * | 2004-07-06 | 2005-03-16 | 王训明 | Peduncle eliminating method from shredded tobacco |
| CN205128412U (en) * | 2015-11-04 | 2016-04-06 | 智思控股集团有限公司 | High -efficient pipe tobacco winnowing equipment |
| CN208303239U (en) * | 2018-04-13 | 2019-01-01 | 红云红河烟草(集团)有限责任公司 | Obstruct the multistage pneumatic separation case of label in a kind of tobacco shred |
| CN113533349A (en) * | 2021-07-19 | 2021-10-22 | 吴玉生 | Intelligent automatic tobacco shred impurity detecting and removing system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11944116B1 (en) | 2023-02-13 | 2024-04-02 | China Tobacco Yunnan Industrial Co., Ltd. | Device and method for removing unwanted objects from cut tobacco in a cut tobacco production line |
| US12011031B1 (en) | 2023-02-21 | 2024-06-18 | China Tobacco Yunnan Industrial Co., Ltd. | Device for removing stems in a cigarette making process and a method for removing the stems |
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Application publication date: 20220913 |