An unknown college student, known as Caigou by Jiang Hu
original author: jacky Li
Email : [email protected]
Time of completion：2023.1.26
Last edited: 2023.2.1
Table of contents
Application of Machine Vision in Tobacco Field
Tobacco Leaf Appearance Inspection
Detection of foreign matter in tobacco powder raw materials
Leaf stem cut tobacco defect detection
Cigarette filter appearance detection
Cigarette Appearance Defect Inspection
Cigarette package OCR character detection
Cigarette package defect detection
Seal misplacement and missing detection
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Application of Machine Vision in Tobacco Field
The tobacco field is a big field in China, which can create a lot of tax revenue and employment opportunities for the government every year.
Tobacco industry has complex workflow, troublesome operation and fast production speed, and many substandard products are produced during the production process.
The entire process of tobacco leaves from entering the production line of the cigarette factory to the production of finished cigarettes has been gradually separated from manual assistance, especially after the leaves are changed into single leaves, there is no longer a manual leaf laying process, so the sundries mixed in the tobacco leaves and moldy and rotten tobacco leaves cannot be removed, which has a great impact on the quality of cigarette products.
It is very important to find and remove unqualified products in time, otherwise the unqualified products will flow to the next process and be packaged and boxed. Although it does not affect the use, it will reduce user satisfaction and at the same time Weaken brand value and product credibility.
Today, visual inspection systems are widely used in many industries. CCD industrial cameras are used to capture images to be inspected, and then converted into digital information. By processing and judging image digital signals, the on-site equipment actions are controlled.
Today, with the rapid development of automation, machine vision systems are widely used in many industries with the advantages of high speed, high efficiency, and non-contact. Among them, the visual inspection applications in cigarette and tobacco product packaging mainly include the following:
Tobacco Leaf Appearance Inspection
When removing and detecting impurities in tobacco leaves on the threshing and redrying and silk-making production lines, it is necessary to accurately identify impurities such as carton boards and hemp ropes in the identification of impurities, color, shape, and texture in the leaves.
Detection of foreign matter in tobacco powder raw materials
Since the whole process of tobacco leaves from entering the production line of the cigarette factory to producing finished cigarettes has been gradually separated from manual assistance, especially after changing the tobacco leaves into single leaves, there is no longer the manual leaf laying process, so the impurities mixed in the tobacco leaves and moldy and rotten tobacco leaves cannot be removed. It is necessary to immediately remove sundries and detect and identify moldy and rotten tobacco leaves on the silk production line for primary processing of tobacco leaves.
Leaf stem cut tobacco defect detection
Stem shredded tobacco is shredded tobacco that is processed from the stems of tobacco leaves. Due to its special physical properties and processing technology factors during the shred making process, it is easy to have stem sticks and stem pieces with a large width and area, and stem sticks and stem pieces. It has the disadvantages of high tar content, high hardness, poor combustion performance, poor filling performance, etc., and it is very easy to cause the phenomenon of cigarette tip drop and cause fire and other major safety hazards. Identifying cut stems and judging whether they are stem sticks or stems with too large width is a key link in the quality control of shredded tobacco in the tobacco industry.
Cigarette filter appearance detection
If the filter tip is too long, it can only be cut off, resulting in an extra process, and if it is too short, it can only be scrapped, resulting in an increase in cost. Ensure filters are present, in the correct shape and free from defects to avoid unnecessary returns and customer complaints.
Cigarette Filter Counts
Accurately count cigarette filters contained in large packing cartons, regardless of filter size, color or shape.
Cigarette Appearance Defect Inspection
The production speed of the high-speed cigarette making machine is very fast. The cigarette inspection system is an indispensable packaging quality control component in the cigarette packaging machine. It detects the lack of cigarettes, lack of mouth, empty ends, reversed cigarettes, etc. in the cigarette packaging to ensure the quality of cigarettes.
Cigarette package OCR character detection
Accurately read OCR characters and confirm printed information, verifying the quality of essential printed elements such as logos, date/batch information and other graphics helps tobacco manufacturers comply with stringent tobacco regulations.
Cigarette package defect detection
There are three types of cigarette packaging: soft pack, hard pack, and carton.
Since the outer packaging of the soft bag is relatively soft and easily deformed, the inspection of the soft bag is the most difficult of all inspections.
The main inspection content includes trademark, top floret, missing printing, correct direction and position; top and bottom internal packaging quality and related position inspection, etc.
Cigarette packing inspection
For cigarette sticks (boxes) in the packing process, there are often missing sticks, missing layers, empty boxes, inverted stacks, and upside-down cigarette boxes, as well as mixed and mispacked small packages in the cartons, etc. Mixed with other waste paper tape sundries, etc.
Seal misplacement and missing detection
The top seal of the soft-pack cigarette is used as an identification of the relevant information of the cigarette. During the packaging process of the cigarette, it should be ensured that the position of the seal is correct and cannot be missing. A detection device is needed for real-time monitoring to ensure that each pack is Cigarette seal quality. The machine vision technology has the advantages of simple setting, powerful image grayscale analysis function, and a wide range of grayscale recognition. It can realize the seal recognition of cigarettes from different manufacturers and improve the stability of the packaging machine.
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