CN114659994B - Tobacco foreign matter extraction and detection system - Google Patents
Tobacco foreign matter extraction and detection system Download PDFInfo
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- CN114659994B CN114659994B CN202210562274.4A CN202210562274A CN114659994B CN 114659994 B CN114659994 B CN 114659994B CN 202210562274 A CN202210562274 A CN 202210562274A CN 114659994 B CN114659994 B CN 114659994B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N2001/028—Sampling from a surface, swabbing, vaporising
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Abstract
Disclosed is a tobacco foreign matter extraction and detection system, comprising: a closed gas analysis zone (8) comprising: a high spectrum analyzer; and a mucous membrane (11) which moves in the gas analysis region and passes through the irradiation region of the high spectrum analyzer; a gas collecting branch pipe (3) inserted into the tobacco raw material to collect gas; and a centrifuge (12) which provides the kinetic energy of gas flow for the system, enables the gas collecting branch pipe to continuously collect the gas in the tobacco raw material, enables the gas to flow to the mucosa of the gas analysis area, compares the spectral curve image formed by the detection of the high spectrum analyzer with the spectral curve image of the foreign matter marked in the computer, and judges whether the foreign matter exists in the tobacco and the type of the foreign matter according to the comparison result. The invention can comprehensively and accurately detect foreign matters in the tobacco raw materials.
Description
Technical Field
The present invention relates to detection of foreign matter such as tobacco mold.
Background
In the tobacco processing industry, the quality of tobacco raw materials is directly related to the quality of the cigarette product and even to the health of the person smoking the cigarette. During the process of harvesting and transporting, tobacco often mixes with foreign matters such as tobacco broken leaves and hemp threads. If the temperature and humidity of the environment are not well controlled, mould such as aflatoxin, aspergillus niger, aspergillus goruinii, penicillium chrysogenum, rhizopus stolonifer and the like can be generated in the tobacco. The aspergillus toxin is one of the most toxic compounds in nature, is a toxic secondary metabolite produced by some aspergillus fungi, and has strong carcinogenicity (capable of inducing liver cancer), mutagenicity and teratogenicity to human beings. Of the dozens of currently known aflatoxins, aflatoxin B1(AFB1) is the most toxic, and after the raw material of tobacco is polluted, even if the content of the aflatoxin is one part per billion (ppb level), the human beings can die after the aflatoxin is eaten for a long time. The aspergillus flavus has the characteristics of rapid bacterial colony growth, non-compact structure, gray green front surface and colorless or slightly brown back surface, the mycelium is composed of conidiophores, apical sac, phimosis and conidiophores to synthesize spore heads, the mycelium is mainly propagated in the air in a conidiophores mode, and is easy to pollute nearby substances and can be rapidly propagated in a large area. Foreign matters such as tobacco broken leaves and hemp threads mixed in the tobacco raw materials and mould generated are detected in an economical and efficient detection mode, and the detection method is very important for guaranteeing the tobacco quality.
Disclosure of Invention
The invention provides a tobacco foreign matter extraction and detection system, which utilizes a centrifugal machine to provide flowing gas, so that the gas flows from the interior of tobacco to a mucous membrane in a closed space, the mucous membrane adsorbs foreign matters in the gas in the tobacco raw material, and then a high spectrum analyzer is utilized to detect sediments on the mucous membrane, so that the types of the foreign matters in the tobacco raw material are comprehensively and accurately reflected, and the product quality of tobacco products is improved.
According to an aspect of the embodiments of the present invention, there is provided a tobacco foreign matter extraction and detection system, including:
a closed gas analysis zone comprising: a high spectrum analyzer; and a mucous membrane that moves in the gas analysis region and passes through the illuminated area of the high optical spectrum analyzer;
the gas collecting branch pipe is inserted into the interior of the tobacco raw material to collect gas, micropores capable of enabling spores of fungi to enter the pipe and filtering out other large-volume foreign matters are formed in the gas collecting branch pipe, and the gas collecting branch pipe is communicated with the gas analysis area in a fluid mode; and a centrifuge for providing kinetic energy of gas flow to the system to enable the gas collection manifold to continuously collect gas from within the tobacco raw material and to flow the gas to the mucosa of the gas analysis zone,
and comparing the spectral curve image formed by the high spectrum analyzer detection with the foreign matter spectral curve image marked in the computer, and judging whether foreign matters exist in the tobacco or not and the types of the foreign matters according to a comparison result.
In some examples, the adhesive film has an epoxy solid gum thereon that adheres to foreign matter from the gas inside the tobacco raw material.
In some examples, the substrate on the adhesive film bearing the epoxy resin solid glue is black.
In some examples, the inlet and outlet of the mucosa of the gas analysis zone have rollers that move the mucosa, the rollers of the inlet and outlet being maintained at a differential speed to ensure stability and surface flatness of the mucosa.
In some examples, the lower end of the gas collecting branch pipe is of a conical structure.
In some examples, the bottom of the gas collection manifold has a cavity to collect a sample of tobacco raw material.
In some examples, the gas collection manifold is disposed on a lifting device.
In some examples, the lifting device is provided with a flexible cover film which covers the surface of the tobacco raw material near the gas collecting branch pipe as the gas collecting branch pipe descends.
In some examples, the lifting device periodically inserts the gas collection manifold into tobacco on the flow line.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
Fig. 1 is a schematic view of a tobacco foreign matter extraction and detection system according to an embodiment of the present invention.
FIG. 2 is a schematic view of a gas collecting manifold according to an embodiment of the present invention.
Fig. 3 is a schematic view of a working process of a tobacco foreign matter extraction and detection system according to an embodiment of the present invention.
Detailed Description
The invention utilizes Hyperspectral imaging (Hyperspectral Image) technology to carry out fine reflection on foreign matters in tobacco. The hyperspectral imaging is a comprehensive technology integrating a detector technology, a precise optical machine, weak signal detection, a computer technology and an information processing technology. The hyperspectral imaging simultaneously detects two-dimensional geometric space and one-dimensional spectral information of a target and acquires continuous and narrow-band image data with hyperspectral resolution, and is a multidimensional information acquisition technology combining an imaging technology and a spectral technology.
The wavelength range of the electromagnetic wave of the hyperspectral imager is generally 10 2 nm to 10 4 nm belongs to microwave, and has poor penetrating power and weaker imaging capability on the interior of an object. Namely, the hyperspectral imager has not ideal analysis capability on the substances inside the object. In the tobacco raw material processing, the raw materials are generally stacked together and transported on a conveyor belt of an assembly line in a dense block shape, so that the raw materials on the assembly line cannot be directly detected by a hyperspectral imager.
Fig. 1 shows a tobacco foreign matter extraction and detection system which enables a fine reflection of foreign matter by introducing an air flow into tobacco to allow the foreign matter to enter a detection area of a high spectrum analyzer 13. As shown in fig. 1, the system includes a gas collection zone 1 and a gas analysis zone 8. The centrifuge 12 provides the kinetic energy of the gas flow for the whole system, and ensures that the gas collecting branch pipe 1 can continuously collect the gas inside the tobacco raw material and convey the gas to the gas analysis area 8.
In the gas collecting area 1, a plurality of gas collecting branch pipes 3 are inserted into the tobacco raw material under the drive of the lifting device 6, and the conical heads 2 at the lower ends of the gas collecting branch pipes 3 play a role in reducing the friction resistance between the tobacco raw material and the branch pipes 3 and simultaneously reduce the gaps generated in the tobacco raw material near the branch pipes 3. The bottom of the gas collecting manifold 3 has a small cavity which can carry a portion of the inner tobacco while moving inside the tobacco raw material and perform a sampling inspection outside.
As shown in FIG. 2, the surface of the gas collecting manifold 3 used in the present invention is unevenly distributed with micro-pores of micron size, which may have a diameter of 100 microns, but is not limited thereto, so that spores (having a diameter of about 10 to 100 microns) of fungi can enter the gas collecting manifold 3 while filtering out other large-sized foreign substances. Since the texture of the region near the surface of the bulk tobacco raw material is looser, the texture of the inner and bottom regions is tighter, which results in differences in air flow capacity in different regions. Therefore, the distribution pattern of the micropores, including the number of micropores and the distance between the micropores, can be determined based on the optimization module in the COMSOL simulation software, with the variance of the air flow velocity in the collection area between the gas collection manifolds 3 as the optimization target. The smaller the variance, the more uniform the air flow velocity distribution and the more thorough the collection.
The tobacco raw material 1 is also covered with a flexible covering film 4 on the surface. The flexible covering film 4 covers the surface of the tobacco raw material 1 in the vicinity of the gas collecting branch pipe 3 as the gas collecting branch pipe 3 descends. The gas collecting branch pipe 3 in the working state can reduce the internal air pressure of the tobacco raw materials, the flexible covering film 3 is further attached to the tobacco raw materials 1, so that the air tightness of the area near the gas collecting branch pipe 3 is enhanced, the influence of inevitable vibration of the system on the air tightness of the area near the gas collecting branch pipe 3 in the working process is reduced, more collected gas passes through the tobacco raw materials 1 and carries foreign matters in tobacco blocks.
All the devices in the gas collection area 1 are in working state, and all the devices in the gas analysis area 8 are in working state at the same time, so that the real-time detection effect is realized. The gas collecting branch pipes 3 are communicated with a gas collecting main pipe 5, and the collected gas is rapidly conveyed to a gas analysis area 8 through flexible telescopic pipes 7. The inner walls of the pipelines 3, 5 and 7 are required to be flat and smooth, so that foreign matters are prevented from staying or accumulating. The length of the flexible bellows 7 is to be taken into account in combination with the length of the gas collecting branch 3 and the spatial layout of the entire system.
In the gas analysis area 8, a mucous membrane 11 and a high spectrum analyzer 13 are arranged. The side of the adhesive film 11 facing the flexible extension tube 7, i.e. the windward side, is coated with a layer of epoxy resin solid glue, the thickness of which is greater than 0.5 mm, and is generally 1 mm thick. The epoxy resin solid glue is used for adhering foreign matters in gas in the tobacco raw material; one-way valves are arranged at the positions where the mucosa 11 enters and leaves the gas analysis area 8, and are used for ensuring the air tightness of the gas analysis area and avoiding influencing the accuracy of gas analysis. The substrate of the adhesive film 11 bearing the epoxy resin solid glue is selected to be black, so that the influence of ineffective reflected light on a detection result is reduced. The mucosa 11 enters from one end of the gas analysis area 8 and leaves from the other end under the drive of the roller 9, so that the continuity of detection is realized. The mucosa 11 is moving at a very low speed, such as, but not limited to, 5 mm per second. In addition, the rollers 9 at the two ends of the gas analysis zone 8 maintain a certain differential speed, typically 0.5 mm/s, so as to exert a tensile stress on the mucosa 11, ensuring its stability and surface flatness.
The mucosa 11 passes through the illuminated area of the hyperspectral analyzer 13, which receives the reflected optical information and forms an accurate continuous spectral curve image. The range of the collected hyperspectral data wave band is 400-1000 nanometers. In the process of collecting hyperspectral images of foreign matters in air inside tobacco raw materials, mucosa leaving a foreign matter analysis area needs to be subjected to centralized sealing treatment in order to protect the health of workers. The hyperspectral image of the black mucosa is collected as a reference 1, the image collected after the light source is closed and the lens cover is covered is used as a reference 2, and the collected hyperspectral image is corrected by the reference 1 and the reference 2 so as to inhibit random noise caused by the instrument and dark current. The reflectivity of the black substrate does not change much in different wavebands and decreases slightly with increasing wavelength, and then remains substantially stable. Therefore, the foreign matter spectral image can be distinguished easily and compared with the foreign matter spectral curve image marked in the computer system, and the foreign matter with higher similarity is judged as the corresponding foreign matter.
Referring to fig. 3, the working method of the tobacco foreign matter extraction and detection system is as follows: the lifting device 6 drives the gas collecting main pipe 5 to move downwards, the gas collecting branch pipes 3 are inserted into the tobacco raw material, and the flexible covering film 4 covers the surface of the tobacco raw material; starting the centrifuge 12, the mucosa drum 9 and the high spectrum analyzer 13, the gas analysis section 8 starts to receive the gas from the gas collection section 1 and adheres to the mucosa 11; the high spectrum analyzer 13 analyzes the foreign matter in the detection area and compares the spectral curve image with the spectral image curve existing in the computer system to distinguish the specific foreign matter.
Claims (9)
1. A tobacco foreign matter extraction and detection system, comprising:
a closed gas analysis zone comprising: a high spectrum analyzer; and a mucous membrane that moves in the gas analysis region and passes through the illuminated area of the high optical spectrum analyzer;
the gas collecting branch pipe is inserted into the interior of the tobacco raw material to collect gas, micropores capable of enabling spores of fungi to enter the pipe and filtering out other large-volume foreign matters are formed in the gas collecting branch pipe, and the gas collecting branch pipe is communicated with the gas analysis area in a fluid mode; and
a centrifuge providing kinetic energy of gas flow to the system, enabling the gas collection manifold to continuously collect gas from within the tobacco raw material and to flow the gas onto the mucosa of the gas analysis zone,
and comparing the spectral curve image formed by the high spectrum analyzer detection with the foreign matter spectral curve image marked in the computer, and judging whether foreign matters exist in the tobacco or not and the types of the foreign matters according to a comparison result.
2. The tobacco foreign matter extraction and detection system of claim 1, wherein the adhesive film has an epoxy resin solid glue adhering to foreign matter from gas inside the tobacco raw material.
3. The tobacco foreign matter extraction and detection system according to claim 2, wherein the substrate on the adhesive film supporting the epoxy resin solid glue is black.
4. The tobacco foreign matter extraction and detection system according to claim 2 or 3, wherein the inlet and outlet of the mucosa of the gas analysis area have rollers for moving the mucosa, and the rollers of the inlet and outlet are maintained at a differential speed to ensure the stability and surface flatness of the mucosa.
5. The tobacco foreign matter extraction and detection system of claim 1, wherein the lower end of the gas collection manifold is of a tapered configuration.
6. The tobacco foreign matter extraction and detection system of claim 1, wherein the bottom of the gas collection manifold has a cavity to collect a sample of tobacco raw material.
7. A tobacco foreign matter extraction and detection system according to claim 1 or 5 or 6, wherein the gas collecting branch is provided on a lifting device.
8. The tobacco foreign matter extraction and detection system of claim 7, wherein the lifting device is provided with a lifting device
There is a flexible cover film that covers the surface of the tobacco raw material in the vicinity of the gas collecting branch as it descends.
9. The tobacco foreign matter extraction and detection system of claim 7, wherein the lifting device periodically inserts the gas collection manifold into tobacco on a flow line.
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| CN202210562274.4A CN114659994B (en) | 2022-05-23 | 2022-05-23 | Tobacco foreign matter extraction and detection system |
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| CN202210562274.4A CN114659994B (en) | 2022-05-23 | 2022-05-23 | Tobacco foreign matter extraction and detection system |
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| CN114659994B true CN114659994B (en) | 2022-08-05 |
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