CN113390884A - Cigarette abnormity monitoring method and device for cigarette conveying channel of cigarette equipment - Google Patents
Cigarette abnormity monitoring method and device for cigarette conveying channel of cigarette equipment Download PDFInfo
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- CN113390884A CN113390884A CN202010171020.0A CN202010171020A CN113390884A CN 113390884 A CN113390884 A CN 113390884A CN 202010171020 A CN202010171020 A CN 202010171020A CN 113390884 A CN113390884 A CN 113390884A
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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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
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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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8883—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges involving the calculation of gauges, generating models
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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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
Abstract
The invention discloses a cigarette abnormity monitoring device of a cigarette conveying channel of cigarette equipment, which comprises a cigarette conveying channel, a transparent surface, a fixed support, a camera, a light source component, an alarm prompting device, a signal acquisition and processing unit and an industrial personal computer, and is characterized in that: the cigarette conveying channel is provided with a transparent surface, and the fixed support is fixedly connected to one side of the transparent surface of the cigarette conveying channel; the camera is fixed on the fixed support and is positioned at one end, far away from the transparent surface, of the fixed support; the light source component is fixed on the fixed bracket, and the alarm prompting device is fixed at the upper end of the fixed bracket; the fixed bracket is arranged outside the cigarette conveying channel and is positioned between the cigarette rolling and connecting machine and the cigarette discharging channel of the packing machine. The invention can accurately and automatically monitor the abnormal cigarette problem in the cigarette conveying channel process, reduce the halt of the equipment and improve the production efficiency of the equipment; the device has the advantages of simple structure, accurate monitoring, superior performance and convenient operation and maintenance.
Description
Technical Field
The invention relates to the technical field of cigarette monitoring from a cigarette making machine to a cigarette conveying channel of a packaging machine in a tobacco processing process, in particular to a method and a device for monitoring cigarette abnormity of the cigarette conveying channel of cigarette equipment.
Background
On the cigarette-connecting production line, in order to meet the requirement of matching the production of the cigarette making machine and the packaging machine, a cigarette storage device is usually additionally arranged between the cigarette making machine and the packaging machine, cigarettes are processed from the cigarette making machine and then enter a cigarette warehouse of the packaging machine through the cigarette storage device, and due to the difference (speed difference) of the operating speeds of the cigarette making machine, the cigarette storage device and the packaging machine, the cigarette conveying process is longer, the cigarette discharging of the cigarette making machine is possible to have defects, and occasionally, the phenomena of transverse cigarettes, disordered cigarettes and broken residual cigarettes enter the cigarette warehouse of the packaging machine occur. Although the packaging machine cigarette warehouse has related detection to cause shutdown, the horizontal cigarettes, the messy cigarettes and the broken residual cigarettes entering the packaging machine cigarette warehouse still need to be manually processed. If the operator takes away before the abnormal conditions such as transverse cigarettes, disordered cigarettes, broken cigarettes and the like enter the cigarette warehouse of the packaging machine, the production is not influenced, but the cigarettes with the abnormal conditions such as the transverse cigarettes, the disordered cigarettes, the broken cigarettes and the like enter the cigarette warehouse of the packaging machine, the shutdown is not only caused, and more cigarettes are consumed.
In view of the above, early warning of abnormal cigarette conveying conditions of cigarettes in a cigarette conveying channel and abnormal cigarettes such as transverse cigarettes, disordered cigarettes, broken cigarettes and the like is an effective means for improving production efficiency and reducing consumption, but a means of single manual monitoring is not reliable enough, and an automatic monitoring and early warning device is needed.
Disclosure of Invention
The invention aims to provide a method for conveniently monitoring cigarette abnormity of a cigarette conveying channel in real time, and by monitoring the method and the device, if abnormity occurs, an alarm can be rapidly given, so that more serious machine halt caused by abnormal cigarettes is reduced.
The cigarette abnormity monitoring method and the device thereof of the cigarette conveying channel of the cigarette equipment are based on digital image processing technology for processing and analysis, and are characterized in that analysis is carried out according to collected normal and abnormal images, and a background difference method, a characteristic matching method and/or an image classification method are carried out to realize the identification of cigarette abnormity. The invention can accurately and automatically monitor the abnormal cigarette problem in the cigarette conveying channel process, reduce the halt of the equipment and improve the production efficiency of the equipment; the device has the advantages of simple structure, accurate monitoring, superior performance and convenient operation and maintenance.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a cigarette equipment cigarette transfer passage cigarette unusual monitoring devices, its includes cigarette transfer passage (1), transparent (11), fixed bolster (2), camera (21), light source part (22), warning suggestion device (23), signal acquisition and processing unit (3), industrial computer (4), its characterized in that: the cigarette conveying channel is provided with a transparent surface, and the fixed support is fixedly connected to one side of the transparent surface of the cigarette conveying channel; the camera is fixed on the fixed support and positioned at one end, far away from the transparent surface, of the fixed support, and the camera images towards the interior of the cigarette conveying channel through the transparent surface; the light source part is fixed on the fixed bracket, the light source generated by the light source part faces the interior of the cigarette conveying channel through the transparent surface, and the alarm prompting device is fixed at the upper end of the fixed bracket; the signal acquisition and processing unit is connected with the camera, the light source component and the alarm prompting device through cables, and the other end of the signal acquisition and processing unit is connected to the industrial personal computer; the fixed bracket is arranged outside the cigarette conveying channel and is positioned between the cigarette rolling and connecting machine and the cigarette discharging channel of the packing machine.
Further, the transparent surface is made of a transparent material, and the transparent material is selected from common glass, organic glass or polyvinyl chloride; the camera is an industrial camera which can image the interior of the cigarette conveying channel through a transparent surface, one or more cameras are used, the camera is a monochrome camera or a color camera, or an intelligent camera, and the acquisition and processing are integrated in the intelligent camera; the up-down, front-back and left-right positions of the camera can be adjusted, and the focal length can be adjusted.
Furthermore, the light source component uses white light or infrared light, the light source component is respectively positioned at the left side or the right side or the upper side and the lower side of the camera, the position of the light source component is adjustable, the angle of the light source component is adjustable, the length of the light source is determined according to the visual field to be monitored, and one or more light source components are provided; the camera, the light source component and the alarm prompting device are connected with the cable and the signal acquisition and processing unit through network cables, the other end of the signal acquisition and processing unit is connected with the industrial personal computer and receives the control of the industrial personal computer, and the industrial personal computer is used for storing and processing images acquired by the camera and controlling light source signals.
A monitoring method of a cigarette abnormity monitoring device of a cigarette conveying channel of cigarette equipment is adopted, the monitoring method carries out detection by a background difference method, a characteristic matching method and/or an image classification method, and is characterized in that,
the background difference method comprises the following steps:
a1, collecting images of cigarettes normally conveyed by a cigarette conveying channel, and after the images are collected, using the images obtained by maximum or minimum filtering of a specific template as template images, wherein the purpose of filtering is to reduce the influence of cigarette paper and gaps in the cigarettes on the images;
a2, when monitoring is needed, acquiring a cigarette image to be monitored, and obtaining the image to be monitored by using the template with the specific size and the filtering method in the step A1;
a3, carrying out difference calculation on the obtained image to be monitored and the template image, and counting the difference result of the two images;
a4, setting a relevant threshold value to judge the difference result in the step A3, if the difference result is larger than or smaller than the set threshold value, the image to be detected is unqualified, namely the cigarette is abnormal;
wherein, B, the characteristic matching method comprises the following steps:
b1, carrying out image acquisition on cigarette abnormal conditions in the conveying channel, and carrying out image feature extraction on various abnormalities;
b2, acquiring the cigarette image to be detected, and comparing the acquired cigarette image with the stored abnormal characteristics according to the characteristics of the image;
b3, setting the compared parameters and threshold values, if the parameters and the threshold values meet the characteristic matching, judging the condition to be abnormal, otherwise, if the parameters and the threshold values do not meet the characteristic matching, judging the condition to be normal;
the image classification method comprises the following steps:
c1, extracting a certain amount of samples from the normal cigarette image and the abnormal cigarette image in the conveying channel respectively, and making normal or abnormal labels for the samples respectively;
c2, respectively calculating the characteristics of the normal sample and the abnormal sample, extracting the mean value and the variance of each color channel of the image, extracting the texture characteristics of the image and the like;
c3, inputting the characteristics of the label image to a classifier for model training to obtain a classification model, and carrying out inheritance learning on the model to continuously optimize model parameters;
c4, monitoring the cigarette to be tested, extracting the corresponding characteristics in the step C2 after obtaining the image, inputting the characteristics into the classification model trained in the step C3 for prediction, and obtaining whether the cigarette to be tested is normal or not.
Further, in actual use, one or more of a background subtraction method, a feature matching method and/or an image classification method are employed in accordance with the detection accuracy and the error rate of the processing result, the cigarette conveying speed and the conveying amount.
Compared with the prior art, the invention has the following advantages:
(1) the invention can dynamically monitor the cigarette running condition in the cigarette conveying channel, makes up the defects of the existing manual monitoring, and monitors the cigarettes in real time through the monitoring device/method.
(2) The cigarette abnormal condition alarm device can alarm cigarette abnormal conditions, operators take away the abnormal conditions such as transverse cigarettes, disordered cigarettes and broken and incomplete cigarettes before the abnormal conditions such as the transverse cigarettes, the disordered cigarettes and the broken and incomplete cigarettes enter the cigarette warehouse of the packing machine, stop machine caused by the abnormal conditions such as the transverse cigarettes, the disordered cigarettes and the broken and incomplete cigarettes is avoided, more cigarettes are consumed, and therefore the working efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a cigarette abnormity monitoring device of a cigarette conveying channel of the cigarette equipment;
FIG. 2 is a schematic structural view (top view) of a cigarette abnormity monitoring device of a cigarette conveying channel of the cigarette equipment;
FIG. 3 is a schematic flow chart of a cigarette abnormity monitoring method of a cigarette conveying channel of the cigarette equipment.
In the figure: the cigarette conveying device comprises a cigarette conveying channel 1, a transparent surface 11, a fixed support 2, a camera 21, a light source part 22, an alarm prompting device 23, a signal acquisition and processing unit 3 and an industrial personal computer 4.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-3, a cigarette abnormity monitoring device of a cigarette conveying channel of cigarette equipment comprises a cigarette conveying channel 1, a transparent surface 11, a fixed support 2, a camera 21, a light source part 22, an alarm prompting device 23, a signal acquisition and processing unit 3 and an industrial personal computer 4; the cigarette conveying channel 1 is provided with a transparent surface 11, and the fixed support 2 is fixedly connected to one side of the transparent surface 11 of the cigarette conveying channel 1; the camera 21 is fixed on the fixed support 2 and is positioned at one side face/end of the fixed support 2 far away from the transparent face 11, and the camera 21 forms images towards the interior of the cigarette conveying channel 1 through the transparent face 11; the light source part 22 is fixed on the fixed bracket 2, the light source generated by the light source part penetrates through the transparent surface 11 and faces to the inside of the cigarette conveying channel 1, and the alarm prompting device 23 is fixed on the upper side/upper end of the fixed bracket 2; the signal acquisition and processing unit 3 is connected with the camera 21, the light source part 22 and the alarm prompting device 23 through cables, and the other end of the signal acquisition and processing unit 3 is connected with the industrial personal computer 4; the fixed support 2 is arranged outside the cigarette conveying channel 1 and is positioned between the cigarette rolling machine and the cigarette discharging channel of the packing machine.
The transparent surface 11 is made of a transparent material, and the transparent material is selected from common glass, organic glass, polyvinyl chloride or the like. Wherein the camera 21 is an industrial camera capable of imaging the inside of the cigarette conveying passage 1 through the transparent surface 11, and the one or more cameras 21 may be a monochrome (black and white) camera or a color camera. The transmission and processing mechanism after image acquisition is an image acquisition card or a network cable and a computer, or the industrial camera is an intelligent camera, the acquisition and processing are integrated in the intelligent camera, the up-down, front-back and left-right positions of the camera are adjustable, and the focal length is adjustable.
The optical component 22 is white light or infrared light, the light source components 22 are respectively located at the left and right sides or upper and lower sides of the camera, the position of the light source components 22 is adjustable, the angle is adjustable, the length of the light source is determined according to the field of view to be monitored, and one or more light source components 22 are provided. The camera 21, the light source part 22 and the alarm prompting device 23 are connected with the signal acquisition and processing unit 3 through network cables, the other end of the signal acquisition and processing unit 3 is connected with the industrial personal computer 4 and controlled by the industrial personal computer, and the industrial personal computer is used for storing and processing images acquired by the camera and controlling light source signals.
A cigarette abnormity monitoring method for a cigarette conveying channel of cigarette equipment identifies whether cigarette conveying is abnormal or not after an image of a cigarette conveying state is acquired, and the monitoring method (image processing method) detects through a background difference method A, a characteristic matching method B and/or an image classification method C; in actual use, one or more monitoring methods/processing methods can be configured/adopted according to detection precision/processing result error rate, cigarette conveying speed and conveying quantity.
The background difference method comprises the following steps:
a1, collecting images of cigarettes normally conveyed by a cigarette conveying channel, and after the images are collected, using the images obtained by maximum value or minimum value filtering of a specific template as template images Iamge _ model, wherein the purpose of filtering is to reduce the influence of cigarette paper and gaps in the cigarettes on the images;
a2, when monitoring is needed, acquiring a cigarette Image to be monitored, and obtaining an Image _ detection of the Image to be monitored by using the template with the specific size and the filtering method in the step A1;
a3, carrying out difference calculation on the obtained Image _ detection to be monitored and the template Image Iamge _ model, and counting the difference result of the two images;
a4, setting a relevant threshold value to judge the difference result in the step A3, if the difference result is larger than or smaller than the set threshold value, the image to be detected is unqualified, namely the cigarette is abnormal.
Wherein, B, the characteristic matching method comprises the following steps:
b1, carrying out image acquisition on cigarette abnormal conditions in the conveying channel, and carrying out image feature extraction on various abnormalities;
b2, acquiring the cigarette image to be detected, and comparing the acquired cigarette image with the stored abnormal characteristics according to the characteristics of the image;
b3, setting the parameters and threshold value of the comparison, if the matching of the features is satisfied, judging the comparison to be abnormal, otherwise, if the comparison is not satisfied, judging the comparison to be normal.
The image classification method comprises the following steps:
c1, extracting a certain amount of samples from the normal cigarette image and the abnormal cigarette image in the conveying channel respectively, and making normal or abnormal labels for the samples respectively;
c2, respectively calculating the characteristics of the normal sample and the abnormal sample, extracting the mean value and the variance of each color channel of the image, extracting the texture characteristics of the image and the like;
c3, inputting the characteristics of the label image to a classifier for model training to obtain a classification model, and carrying out inheritance learning on the model to continuously optimize model parameters;
c4, monitoring the cigarette to be tested, extracting the corresponding characteristics in the step C2 after obtaining the image, inputting the characteristics into the classification model trained in the step C3 for prediction, and obtaining whether the cigarette to be tested is normal or not.
The invention can dynamically monitor the cigarette running condition in the cigarette conveying channel, makes up the defects of the existing manual monitoring, and monitors the cigarettes in real time through the monitoring device/method. The cigarette abnormal condition alarm device can alarm cigarette abnormal conditions, operators take away the abnormal conditions such as transverse cigarettes, disordered cigarettes and broken and incomplete cigarettes before the abnormal conditions such as the transverse cigarettes, the disordered cigarettes and the broken and incomplete cigarettes enter the cigarette warehouse of the packing machine, stop machine caused by the abnormal conditions such as the transverse cigarettes, the disordered cigarettes and the broken and incomplete cigarettes is avoided, more cigarettes are consumed, and therefore the working efficiency is improved.
The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (5)
1. The utility model provides a cigarette equipment cigarette transfer passage cigarette unusual monitoring devices, its includes cigarette transfer passage (1), transparent (11), fixed bolster (2), camera (21), light source part (22), warning suggestion device (23), signal acquisition and processing unit (3), industrial computer (4), its characterized in that: the cigarette conveying channel is provided with a transparent surface, and the fixed support is fixedly connected to one side of the transparent surface of the cigarette conveying channel; the camera is fixed on the fixed support and positioned at one end, far away from the transparent surface, of the fixed support, and the camera images towards the interior of the cigarette conveying channel through the transparent surface; the light source part is fixed on the fixed bracket, the light source generated by the light source part faces the interior of the cigarette conveying channel through the transparent surface, and the alarm prompting device is fixed at the upper end of the fixed bracket; the signal acquisition and processing unit is connected with the camera, the light source component and the alarm prompting device through cables, and the other end of the signal acquisition and processing unit is connected to the industrial personal computer; the fixed bracket is arranged outside the cigarette conveying channel and is positioned between the cigarette rolling and connecting machine and the cigarette discharging channel of the packing machine.
2. The cigarette abnormity monitoring device of the cigarette conveying channel of the cigarette equipment as claimed in claim 1, wherein the transparent surface is made of a transparent material, and the transparent material is selected from common glass, organic glass or polyvinyl chloride; the camera is an industrial camera which can image the interior of the cigarette conveying channel through a transparent surface, one or more cameras are used, the camera is a monochrome camera or a color camera, or an intelligent camera, and the acquisition and processing are integrated in the intelligent camera; the up-down, front-back and left-right positions of the camera can be adjusted, and the focal length can be adjusted.
3. The cigarette abnormity monitoring device of the cigarette conveying channel of the cigarette equipment according to claim 2, wherein the light source component uses white light or infrared light, the light source component is respectively positioned at the left side or the right side or the upper side and the lower side of the camera, the position and the angle of the light source component are adjustable, the length of the light source is determined according to the visual field to be monitored, and one or more light source components are provided; the camera, the light source component and the alarm prompting device are connected with the cable and the signal acquisition and processing unit through network cables, the other end of the signal acquisition and processing unit is connected with the industrial personal computer and receives the control of the industrial personal computer, and the industrial personal computer is used for storing and processing images acquired by the camera and controlling light source signals.
4. A method for monitoring cigarette abnormality in a cigarette conveying path of a cigarette making machine according to any one of claims 1 to 3, which is carried out by detecting by a background subtraction method, a feature matching method and/or an image classification method,
the background difference method comprises the following steps:
a1, collecting images of cigarettes normally conveyed by a cigarette conveying channel, and after the images are collected, using the images obtained by maximum or minimum filtering of a specific template as template images, wherein the purpose of filtering is to reduce the influence of cigarette paper and gaps in the cigarettes on the images;
a2, when monitoring is needed, acquiring a cigarette image to be monitored, and obtaining the image to be monitored by using the template with the specific size and the filtering method in the step A1;
a3, carrying out difference calculation on the obtained image to be monitored and the template image, and counting the difference result of the two images;
a4, setting a relevant threshold value to judge the difference result in the step A3, if the difference result is larger than or smaller than the set threshold value, the image to be detected is unqualified, namely the cigarette is abnormal;
wherein, B, the characteristic matching method comprises the following steps:
b1, carrying out image acquisition on cigarette abnormal conditions in the conveying channel, and carrying out image feature extraction on various abnormalities;
b2, acquiring the cigarette image to be detected, and comparing the acquired cigarette image with the stored abnormal characteristics according to the characteristics of the image;
b3, setting the compared parameters and threshold values, if the parameters and the threshold values meet the characteristic matching, judging the condition to be abnormal, otherwise, if the parameters and the threshold values do not meet the characteristic matching, judging the condition to be normal;
the image classification method comprises the following steps:
c1, extracting a certain amount of samples from the normal cigarette image and the abnormal cigarette image in the conveying channel respectively, and making normal or abnormal labels for the samples respectively;
c2, respectively calculating the characteristics of the normal sample and the abnormal sample, extracting the mean value and the variance of each color channel of the image, extracting the texture characteristics of the image and the like;
c3, inputting the characteristics of the label image to a classifier for model training to obtain a classification model, and carrying out inheritance learning on the model to continuously optimize model parameters;
c4, monitoring the cigarette to be tested, extracting the corresponding characteristics in the step C2 after obtaining the image, inputting the characteristics into the classification model trained in the step C3 for prediction, and obtaining whether the cigarette to be tested is normal or not.
5. The monitoring method according to claim 4, wherein one or more of a background subtraction method, a feature matching method and/or an image classification method are used in actual use according to the detection accuracy and the error rate of the processing result, the cigarette conveying speed and the conveying amount.
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| CN202010171020.0A CN113390884A (en) | 2020-03-12 | 2020-03-12 | Cigarette abnormity monitoring method and device for cigarette conveying channel of cigarette equipment |
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| CN202010171020.0A CN113390884A (en) | 2020-03-12 | 2020-03-12 | Cigarette abnormity monitoring method and device for cigarette conveying channel of cigarette equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114158764A (en) * | 2021-12-13 | 2022-03-11 | 龙岩烟草工业有限责任公司 | Messy smoke detection method, messy smoke detection device, computer equipment and storage medium |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114158764A (en) * | 2021-12-13 | 2022-03-11 | 龙岩烟草工业有限责任公司 | Messy smoke detection method, messy smoke detection device, computer equipment and storage medium |
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