CN213933496U

CN213933496U - Tipping paper air permeability on-line detection system

Info

Publication number: CN213933496U
Application number: CN202022058608.3U
Authority: CN
Inventors: 张向明
Original assignee: Wuhan Guanyou Technology Co ltd
Current assignee: Wuhan Guanyou Technology Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-08-10
Anticipated expiration: 2030-09-18

Abstract

The utility model relates to an on-line detection system for the air permeability of tipping paper, the tipping paper is arranged on a driving mechanism, and the driving mechanism drives the tipping paper to move forward; 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 utility model provides a china cypress paper air permeability on-line measuring system, simple structure, measurement accuracy and its accuracy, low in manufacturing cost are honest and clean, can be convenient install the completion on the laser-beam drilling machine of current different manufacturers.

Description

Tipping paper air permeability on-line detection system

Technical Field

The utility model relates to a cigarette equipment technical field, in particular to tipping paper air permeability on-line measuring system.

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.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem who is difficult to accurate on-line measuring china cypress paper air permeability that exists among the prior art, provide a china cypress paper air permeability on-line measuring system.

The utility model provides an above-mentioned technical problem's technical scheme 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 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 utility model provides a china cypress paper air permeability on-line measuring system possesses following beneficial effect or advantage at least:

the utility model provides a china cypress paper air permeability on-line measuring system compares with the china cypress paper air permeability on-line measuring appearance of present all laser beam drilling, at the measurement link, utilizes stroboscopic technique to let the china cypress paper laser hole of high-speed motion static relatively, has solved the image sensor frequency and can not keep up with the problem that the micropore image that motion china cypress paper laser hole frequency caused warp. 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 utility model provides a china cypress paper air permeability on-line measuring system, simple structure, measurement accuracy and its accuracy, low in manufacturing cost are honest and clean, can be convenient install the completion on the laser-beam drilling machine of current different manufacturers.

Drawings

Fig. 1 is a schematic structural view of an online detection system for air permeability of tipping paper provided by an embodiment of the present 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 position control system.

Detailed Description

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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and 2, the embodiment of the utility model provides an online detection system for the air permeability of tipping paper, it 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 3. 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 fig. 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 observe the judged result and the shot image conveniently, the utility model provides a china cypress paper air permeability on-line measuring system still includes: 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 utility model also provides a tipping paper air permeability on-line measuring method, realize based on tipping paper air permeability on-line measuring system, include:

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 S30, 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 S40, 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 m micropores in each row in the n rows 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 is 32 × 25/5000000 ═ 0.00016mm 2. The camera 7 captures an image of the arrangement of m micropores in the unit area on the tipping paper 9 by means of a stroboscopic backlight light source, the backlight light source enables the camera 7 to sense light through the micropores of the tipping paper 9, and the computer collects the number k of pixels sensed by the camera 7 to be equal to the area of the m micropores in the unit area. Namely: the area of the m micropores snapped on the tipping paper unit area is 0.00016k mm 2. 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 embodiment of the utility model provides a china cypress paper air permeability on-line measuring system and method possess following beneficial effect or advantage at least:

the embodiment of the utility model provides a china cypress paper air permeability on-line measuring system and method compares with the china cypress paper air permeability on-line measuring instrument of present all laser beam drilling, and at the measuring link, the china cypress paper laser hole that utilizes stroboscopic technique to let high-speed motion is static relatively, has solved image sensor (camera) frequency and can not keep up with the problem that the micropore image that motion china cypress paper laser hole frequency caused warp. 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 embodiment of the utility model provides a china cypress paper air permeability on-line measuring system, simple structure, measurement accuracy and its accuracy, low in manufacturing cost are honest and clean, and the installation completion on the laser-beam drilling machine of current different manufacturers that can be convenient.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

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 (9), the camera (7) is arranged on the other side of the upper side and the lower side of the tipping paper (9), 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 on-line detection system for air permeability of tipping paper according to claim 1, wherein 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 (3).

3. The online detection system for air permeability of tipping paper according to claim 2, 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).

4. 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).