CN112098299A - Online detection system and method for air permeability of tipping paper - Google Patents
Online detection system and method for air permeability of tipping paper Download PDFInfo
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- CN112098299A CN112098299A CN202010988843.2A CN202010988843A CN112098299A CN 112098299 A CN112098299 A CN 112098299A CN 202010988843 A CN202010988843 A CN 202010988843A CN 112098299 A CN112098299 A CN 112098299A
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- 238000000034 method Methods 0.000 title description 17
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- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000005553 drilling Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 235000019504 cigarettes Nutrition 0.000 description 6
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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Abstract
The invention relates to an online detection system for air permeability of tipping paper, wherein the tipping paper is arranged on a driving mechanism, and the driving mechanism drives the tipping paper to advance; the encoder is in contact with the tipping paper and is electrically connected with the computer processing system; the stroboscope is arranged on one side of the upper side and the lower side of the tipping paper, the camera is arranged on the other side of the upper side and the lower side of the tipping paper, and the stroboscope and the camera are arranged oppositely; the stroboscope and the camera are electrically connected with the computer processing system; the exposure frequency of the stroboscope is consistent with the advancing frequency of the tipping paper. The online detection system for the air permeability of the tipping paper, provided by the invention, has the advantages of simple structure, high measurement precision and accuracy, low manufacturing cost and capability of being conveniently installed and completed on laser drilling machines of different manufacturers.
Description
Technical Field
The invention relates to the technical field of cigarette equipment, in particular to a tipping paper air permeability online detection system and method.
Background
Laser drilling is the most extensive way for reducing tar content of cigarettes at present. The air permeability of the tipping paper after laser drilling is one of important indexes of cigarettes and is also an important factor for determining the quality of the cigarettes, and the international ISO2965 specifies a measuring method of the air permeability of cigarette paper: when the air permeability of the cigarette paper penetrates through a sample under a certain pressure difference, the ratio of air flow per unit sample surface area is that all laser-punched tipping paper air permeability online detectors in the market at present have the following two types:
shooting laser holes on the tipping paper by using an image sensor and a background light source, then calculating the total area of the micropores in the micropore arrangement image, and obtaining the air permeability of the tested tipping paper according to the relation between the area and the air permeability, wherein if the air permeability is within an allowable deviation range, the air permeability is normal, and if the air permeability is close to the allowable deviation, the punching process parameters are adjusted to correct the air permeability deviation to make the air permeability normal. The problems with this approach are evident: due to the limitation of the frequency of the image sensor, the real shape of the laser micropore of the tipping paper moving at high speed cannot be captured, so that the image distortion of the pore area is caused; another problem is that the method for calculating the area of the micropores is complicated, and it is to identify the boundaries of the micropores based on the image, approximate a diameter, calculate the area, and then assemble the area of each micropore to be the total area of the n holes to be measured per unit length. Obviously, the method has large error and high cost of the image sensor, and is not beneficial to practical popularization.
The front of the object to be measured is illuminated by utilizing the photosensitive principle, the other side of the object to be measured receives a light intensity signal by utilizing the photosensitive sensor, and the air permeability value is compared by the sensor intensity signal. The method has the advantages that the standard value is difficult to calibrate in the using process, the requirements on the environment and the brightness stability of the instrument are high, the accuracy of the measured value cannot be guaranteed, and therefore, the method has no practical application so far.
Disclosure of Invention
The invention provides an online detection system and method for the air permeability of tipping paper, aiming at the technical problem that the air permeability of tipping paper is difficult to accurately detect online in the prior art.
The technical scheme for solving the technical problems is as follows:
an online detection system for air permeability of tipping paper comprises: tipping paper, a driving mechanism, an encoder, a stroboscope, a camera and a computer processing system;
the tipping paper is arranged on the driving mechanism, and the driving mechanism drives the tipping paper to advance; the encoder is in contact with the tipping paper and is electrically connected with the computer processing system; the stroboscope is arranged on one side of the upper side and the lower side of the tipping paper, the camera is arranged on the other side of the upper side and the lower side of the tipping paper, and the stroboscope and the camera are arranged oppositely; the stroboscope and the camera are electrically connected with the computer processing system; the exposure frequency of the stroboscope is consistent with the advancing frequency of the tipping paper.
Further, the computer processing system comprises:
an image acquisition module for acquiring a photographed image from the camera;
the pixel processing module is used for scanning the exposed micropores from the image, acquiring the pixel value of each micropore and calculating the sum of the pixel values of all micropores in unit length;
the comparison module is used for comparing the sum of the pixel values of n rows of m micropores in each row in the unit length obtained by the pixel processing module with the total pixel value of n rows of m micropores in each row in the unit length of the standard tipping paper, and calculating a difference value; if the difference value is within the set deviation range, judging that the air permeability of the corresponding tipping paper meets the requirement; and if the difference value is not in the set deviation range, judging that the air permeability of the corresponding tipping paper does not meet the requirement.
Further, the computer processing system further comprises:
the image processing module is used for obtaining an image from the image acquisition module and processing a camera black bar image caused by a stroboscope on the image; and sending the processed image to the pixel processing module.
Further, the driving mechanism includes: the device comprises a fixing plate, an unreeling device, a tension and position control system, a plurality of guide wheels and a reeling device;
the fixed plate, the unreeling device, the tension and position control system, the guide wheels and the reeling device are arranged on the fixed plate; one end of the tipping paper is connected to the unwinding device, the other end of the tipping paper is connected to the winding device, and the tipping paper passes through the tension and position control system and the guide wheels.
Further, the method also comprises the following steps: a support;
the stroboscope and the camera are fixed on the bracket; the bracket is fixed on the fixing plate.
Further, the method also comprises the following steps: a display;
the display is electrically connected with the computer processing system and used for displaying pictures taken by the camera and displaying the judgment result of the computer processing system.
The invention also provides an online detection method for the air permeability of the tipping paper, which is realized based on the online detection system for the air permeability of the tipping paper and comprises the following steps:
and acquiring a shot image from a camera of the online detection system for the air permeability of the tipping paper.
After the image is obtained, the camera black bar image due to the stroboscope is processed.
And scanning the exposed micropores from the image, acquiring the pixel value of each micropore, and calculating the sum of the pixel values of all micropores in unit length.
Comparing the sum of the pixel values of n rows of m micropores in each row in the unit length obtained by the pixel processing module with the total pixel value of n rows of m micropores in each row in the unit length of the standard tipping paper, and calculating a difference value; if the difference value is within the set deviation range, judging that the air permeability of the corresponding tipping paper meets the requirement; and if the difference value is not in the set deviation range, judging that the air permeability of the corresponding tipping paper does not meet the requirement.
The tipping paper air permeability online detection system and the method provided by the invention at least have the following beneficial effects or advantages:
compared with the prior online detector for the air permeability of the tipping paper with laser perforation, the online detection system and the online detection method for the air permeability of the tipping paper have the advantages that in the measuring link, the laser perforation of the tipping paper moving at high speed is relatively static by using a stroboscopic technology, and the problem of micropore image deformation caused by the fact that the frequency of an image sensor cannot keep up with the frequency of the laser perforation of the moving tipping paper is solved. In the computer processing link, the number of pixels exposed by the camera is used for replacing an image sensor to capture the micropore boundary calculation area, so that the calculation accuracy is improved, and the processing time of the computer is reduced. The online detection system for the air permeability of the tipping paper, provided by the invention, has the advantages of simple structure, high measurement precision and accuracy, low manufacturing cost and capability of being conveniently installed and completed on laser drilling machines of different manufacturers.
Drawings
FIG. 1 is a schematic structural diagram of an online detection system for air permeability of tipping paper provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a computer processing system according to an embodiment of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
the method comprises the following steps of 1-fixing plate, 2-unreeling device, 3-guide wheel, 4-encoder, 5-reeling device, 6-stroboscope, 7-camera, 8-bracket, 9-tipping paper, 10-computer processing system, 101-image acquisition module, 102-image processing module, 103-pixel processing module, 104-comparison module and 11-tension and control system.
Detailed Description
The invention provides an online detection system and method for the air permeability of tipping paper, aiming at the technical problem that the air permeability of tipping paper is difficult to accurately detect online in the prior art.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, an embodiment of the present invention provides an online detection system for air permeability of tipping paper, which mainly includes: tipping paper 9, a driving mechanism, an encoder 4, a stroboscope 6, a camera 7, a bracket 8 and a computer processing system 10. The tipping paper 9 is arranged on the driving mechanism, and the driving mechanism drives the tipping paper 9 to advance; specifically, the drive mechanism includes: fixed plate 1, unwinding device 2, tension and position control system 11, a plurality of guide pulley 3 and coiling mechanism 5 are installed on fixed plate 1, and the rotational speed of a plurality of guide pulleys 3 is the same, and the both ends setting of china cypress paper 9 is on unwinding device 2 and coiling mechanism 5, and china cypress paper 9 is through tension and position control system 11 and a plurality of guide pulley 5. The encoder 4 is in contact with the tipping paper 9, and the encoder 4 is electrically connected with the computer processing system 10; stroboscope 6 sets up one side in the downside on tipping paper 9, and camera 7 sets up the opposite side in the downside on tipping paper 9, and stroboscope 6 sets up with camera 7 relatively. Stroboscope 6 and camera 7 are fixed on support 8, and support 8 is fixed on fixed plate 1. The stroboscope 6 and the camera 7 are electrically connected with the computer processing system 10; the exposure frequency of the stroboscope 6 coincides with the advancing frequency of the tipping paper 9. The motors of the unwinding device 2 and the winding device 5 are started, the tipping paper 9 moves from the unwinding device 2 to the winding device 5, then under the participation of the tension and position control system 11 and the encoder 4, the tipping paper 9 reaches a certain rated speed in a short time and moves at a constant speed until the tipping paper 9 is completely collected, and the laser head starts to measure the air permeability when the tipping paper 9 reaches the constant speed.
In the embodiment of the present invention, referring to fig. 1 and 2, the computer processing system 10 includes:
a computer processing system 101 for acquiring the captured image from the camera 7.
An image processing module 102, for obtaining an image from the computer processing system 101, and processing the black bar image of the camera 7 caused by the stroboscope 6 on the image; the processed image is sent to the pixel processing module 103.
And the pixel processing module 103 is used for scanning the exposed micropores from the image, acquiring the pixel value of each micropore, and calculating the sum of the pixel values of all micropores in the unit length.
And a comparing module 104, configured to compare the sum of the pixel values of the n rows of m micropores in each row in the unit length obtained by the pixel processing module 103 with the total pixel value of the m micropores in each row in the n rows in the unit length of the standard tipping paper 9, and calculate a difference value. If the difference value is within the set deviation range, the air permeability of the corresponding tipping paper 9 is judged to meet the requirement; if the difference is not within the set deviation range, the corresponding tipping paper 9 is judged to have unsatisfactory air permeability.
In order to facilitate observation of the determination result and the shot image, the online detection system for the air permeability of the tipping paper provided by the invention further comprises: a display. The display is electrically connected with the computer processing system 10 and is used for displaying the pictures taken by the camera 7 and displaying the judgment results of the computer processing system 10.
Example two
Referring to fig. 1 and 2, the invention also provides an online detection method for the air permeability of tipping paper, which is realized based on an online detection system for the air permeability of tipping paper, and comprises the following steps:
step S10, a captured image is acquired from the camera 7 of the online air permeability detection system for the tipping paper 9.
Step S20, the black bar image of the camera 7 due to the strobe 6 is processed off the image.
Step S20, scanning the exposed micro-holes from the image, obtaining the pixel value of each micro-hole, and calculating the sum of the pixel values of all micro-holes in the unit length.
Step S30, comparing the sum of the pixel values of the n rows of m micropores in each row in the unit length obtained by the pixel processing module 103 with the total pixel value of the n rows of m micropores in each row in the unit length of the standard tipping paper 9, and calculating a difference value; if the difference value is within the set deviation range, the air permeability of the corresponding tipping paper 9 is judged to meet the requirement; if the difference is not within the set deviation range, the corresponding tipping paper 9 is judged to have unsatisfactory air permeability.
For example:
the laser micropores on the tipping paper 9 which moves at a constant speed of 400m/min are fixed by using a stroboscopic technology, meanwhile, a stroboscope also provides a light source on the back surface of the tipping paper 9, a common camera 7 is used for capturing an apparent static hole on the tipping paper 9, a plurality of micropores on a unit area are subjected to light sensing on the camera 7, and the light-sensing micropores are filled by pixels of the camera 7, so that the quantity of the pixels subjected to light sensing is the area of the micropores on the unit area of the tipping paper 9.
When the uniform speed of the tipping paper 9 is 400m/min and the micropore distance is 0.8 mm, the micropore movement frequency of the tipping paper 9 is as follows: n 1000X400/0.8 500000 times/min. The strobe frequency f of the monarch BBL stroboscope 6 is adjusted to coincide according to the movement frequency n of the minute hole, at which time the minute hole of the tested tipping paper 9 appears to be stationary. Taking the focal length fixed shooting area of a camera 7 pixel as 500 ten thousand cameras 7 as 32 × 25 mm; therefore, the area of a single pixel point is 32 × 25/5000000 ═ 0.00016mm2. Camera 7 dependent frequencyThe backlight source is flashed to capture an image of the arrangement of m micropores in unit area on the tipping paper 9, the backlight source enables the camera 7 to sense light through the micropores of the tipping paper 9, and the number k of pixels sensed by the camera 7 by the computer is integrated into an area equal to the area of the m micropores in unit area. Namely: the area of the m micropores snapped on the tipping paper unit area is 0.00016kmm2. Since the air permeability index is the flow rate of air passing through the total area of the micropores at a specific pressure (e.g., one atmosphere), the air permeability value can be calculated quickly and accurately by measuring the total area of the micropores.
The system and the method for detecting the air permeability of the tipping paper on line provided by the embodiment of the invention at least have the following beneficial effects or advantages:
compared with the prior online detector for the air permeability of the tipping paper with laser perforation, the online detection system and the online detection method for the air permeability of the tipping paper provided by the embodiment of the invention have the advantages that in the measurement link, the laser perforation of the tipping paper moving at high speed is relatively static by using a stroboscopic technology, so that the problem of micropore image deformation caused by the fact that the frequency of an image sensor (camera) cannot keep up with the frequency of the laser perforation of the moving tipping paper is solved. In the computer processing link, the number of pixels exposed by the camera is used for replacing an image sensor to capture the micropore boundary calculation area, so that the calculation accuracy is improved, and the processing time of the computer is reduced. The online detection system for the air permeability of the tipping paper, provided by the embodiment of the invention, has the advantages of simple structure, high measurement precision and accuracy, low manufacturing cost and capability of being conveniently installed and finished on laser drilling machines of different manufacturers.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a tipping paper air permeability on-line measuring system which characterized in that includes: tipping paper (9), a driving mechanism, an encoder (4), a stroboscope (6), a camera (7) and a computer processing system (10);
the tipping paper (9) is arranged on the driving mechanism, and the driving mechanism drives the tipping paper (9) to advance; the encoder (4) is in contact with the tipping paper (9), and the encoder (4) is electrically connected with the computer processing system (10); the stroboscope (6) is arranged on one side of the upper side and the lower side of the tipping paper (11), the camera (7) is arranged on the other side of the upper side and the lower side of the tipping paper (11), and the stroboscope (6) is arranged opposite to the camera (7); the stroboscope (6) and the camera (7) are electrically connected with the computer processing system (10); the exposure frequency of the stroboscope (6) is consistent with the advancing frequency of the micropores of the tipping paper (9).
2. The tipping paper air permeability on-line detection system according to claim 1, characterized in that the computer processing system (10) comprises:
a computer processing system (101) for acquiring a captured image from the camera (7);
the pixel processing module (103) is used for scanning the exposed micropores from the image, acquiring the pixel value of each micropore, and calculating the sum of the pixel values of all micropores in unit length;
a comparison module (104) for comparing the sum of the pixel values of n rows of m micropores per unit length obtained by the pixel processing module (103) with the total pixel value of n rows of m micropores per unit length of the standard tipping paper (9) and calculating a difference value; if the difference value is within the set deviation range, the air permeability of the corresponding tipping paper (9) is judged to meet the requirement; and if the difference is not in the set deviation range, judging that the air permeability of the corresponding tipping paper (9) does not meet the requirement.
3. The tipping paper air permeability on-line detection system according to claim 2, wherein the computer processing system (10) further comprises:
an image processing module (102) for obtaining images from the computer processing system (101), processing black bar images of the camera (7) due to the stroboscope (6) on the images; sending the processed image to the pixel processing module (103).
4. The on-line detection system for air permeability of tipping paper according to any one of claims 1 to 3, characterized in that the driving mechanism comprises: the device comprises a fixing plate (1), an unreeling device (2), a tension and position control system (11), a plurality of guide wheels (3) and a reeling device (5);
the fixed plate (1), the unreeling device (2), the tension and position control system (11), the guide wheels (3) and the reeling device (5) are arranged on the fixed plate (1); one end of the tipping paper (9) is connected to the unreeling device (2), the other end of the tipping paper (9) is connected to the reeling device (5), and the tipping paper (9) passes through the tension and position control system (11) and is multiple of the guide wheel (5).
5. The on-line detection system for air permeability of tipping paper according to claim 4, characterized by further comprising: a support (8);
the stroboscope (6) and the camera (7) are fixed on the bracket (8); the bracket (8) is fixed on the fixing plate (1).
6. The on-line detection system for air permeability of tipping paper according to any one of claims 1 to 3, characterized by further comprising: a display;
the display is electrically connected with the computer processing system (10) and is used for displaying pictures taken by the camera (7) and displaying the judgment result of the computer processing system (10).
7. The tipping paper air permeability online detection method is realized based on a tipping paper air permeability online detection system, and is characterized by comprising the following steps of:
acquiring a shot image from a camera (7) of the online detection system for the air permeability of the tipping paper;
scanning the exposed micropores from the image, obtaining the pixel value of each micropore, and calculating the sum of the pixel values of all micropores in unit length;
comparing the sum of the pixel values of n rows of m micropores in each row on the unit length obtained by the pixel processing module (103) with the total pixel value of n rows of m micropores in each row on the unit length of the standard tipping paper (9), and calculating a difference value; if the difference value is within the set deviation range, the air permeability of the corresponding tipping paper (9) is judged to meet the requirement; and if the difference is not in the set deviation range, judging that the air permeability of the corresponding tipping paper (9) does not meet the requirement.
8. The online detection method for the air permeability of the tipping paper as claimed in claim 7, further comprising: after the image is obtained, the black bar image of the camera (7) due to the stroboscope (6) on the image is processed.
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| CN202010988843.2A CN112098299A (en) | 2020-09-18 | 2020-09-18 | Online detection system and method for air permeability of tipping paper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924292A (en) * | 2021-03-12 | 2021-06-08 | 河南中烟工业有限责任公司 | Detection device and method for detecting quality of silk suction belt and cloth belt by using detection device |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924292A (en) * | 2021-03-12 | 2021-06-08 | 河南中烟工业有限责任公司 | Detection device and method for detecting quality of silk suction belt and cloth belt by using detection device |
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