CN113086653A - Cut tobacco real-time monitoring method and device based on elbow dilute phase conveying high-speed imaging - Google Patents
Cut tobacco real-time monitoring method and device based on elbow dilute phase conveying high-speed imaging Download PDFInfo
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- 241000208125 Nicotiana Species 0.000 title claims abstract description 169
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 169
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- 235000019504 cigarettes Nutrition 0.000 description 5
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
- A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
- A24C5/39—Tobacco feeding devices
- A24C5/392—Tobacco feeding devices feeding pneumatically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
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Abstract
A cut tobacco real-time monitoring method and a device based on elbow dilute phase conveying high-speed imaging are realized by the following modes: a transparent bent pipe with an oval cross section is connected to an upper line of a tobacco shred conveying main pipeline, a vacuum dustproof fan is connected to the other end of the transparent bent pipe, so that tobacco shreds are conveyed at a fluidization speed in the bent pipe to form a wall-adhering motion under the action of centrifugal force, tobacco shred images attached to the transparent pipe wall are obtained through a high-speed imaging system arranged on the outer side of the bent pipe, and the size distribution and the speed distribution of the tobacco shreds are finally obtained after image processing. The device comprises an image acquisition system, a high-speed camera system, an image processing system, a tobacco shred recycling system and a PLC control system. The invention has the advantages that: the pneumatic connecting device is suitable for application scenes of the tobacco industry, and can be connected into an actual pneumatic conveying pipeline in a conventional connecting mode; the method can realize rapid image acquisition, size calculation, speed calculation and statistical analysis of the tobacco shreds, and has good real-time performance.
Description
Technical Field
The invention belongs to the field of tobacco processing, and particularly relates to a method and a device for monitoring the size and the speed of cut tobacco in real time based on elbow dilute-phase pneumatic conveying high-speed imaging.
Background
The tobacco shred structure refers to the mass percentage of the tobacco shreds in different length sections in the total tobacco shreds. Different cut tobacco sizes have obvious influence on the cut tobacco quantity of the cigarette end. The size difference of the cut tobacco not only affects the physical quality and the smoking quality of the product, but also can affect the rolling and connecting process. The tobacco industry standard YC/T289-2009 specifies a method for determining the structure of cut tobacco in formula, and 6 screens with different specifications and sizes and a plane rotating eccentric detection screen technology are used in the method to obtain the mass proportion fractions of cut tobacco with different sizes. Chinese patent CN106370546A provides a method and a device for sampling and testing the whole tobacco shred rate and the broken tobacco shred rate, which solves the problem of incomplete sampling in the process of detecting the whole tobacco shred rate and the broken tobacco shred rate and enables the detection result to be more accurate. The traditional method mostly adopts the mass percentage of the cut tobacco on the screen to measure the size of the cut tobacco, and the method consumes manpower, has low efficiency and poor objectivity and can only obtain the discrete expression of the size of the cut tobacco.
In the dilute phase negative pressure pneumatic conveying system, materials move at high speed, and pipelines and the materials are abraded due to friction and impact. Qiaoweibao and the like (publication number: CN 204847397U) invents a tobacco shred speed detection and control device, which obtains the speed information of charged tobacco shreds through a charge detector.
The machine vision detection technology is a non-contact automatic detection technology, has the advantages of safety, reliability, high detection precision, capability of running for a long time in a complex production environment and the like, is an effective method for realizing factory production automation and intellectualization, and has wide application. Ten and four strong et al (publication No. CN 106770303A) invented a method for characterizing the size of cut tobacco of cigarette based on image analysis, which performs image analysis on cut tobacco of cigarette sampled randomly to obtain a refined characterization of the size of cut tobacco, and visualizes the result. However, the method has the defects that the method can not be used for monitoring the continuous production process of the cut tobacco in real time due to the need of manual sampling, and the efficiency is low.
Disclosure of Invention
The invention aims to provide a method and a device for monitoring the size and the speed of cut tobacco based on elbow dilute phase pneumatic conveying high-speed imaging in real time by utilizing a machine vision technology based on the problems of the existing method. The method is suitable for actual industrial scenes, and provides a method for characterizing the size and the speed of the cut tobacco in the pneumatic conveying process of cigarette production.
The purpose of the invention is realized by the following technical scheme:
a cut tobacco size and speed real-time monitoring method based on elbow dilute phase pneumatic conveying high-speed imaging is realized by the following modes: a transparent bent pipe with an oval cross section is connected to an upper line of a tobacco shred conveying main pipeline, a vacuum dustproof fan is connected to the other end of the transparent bent pipe, so that tobacco shreds are conveyed at a fluidization speed in the bent pipe to form a wall-adhering motion under the action of centrifugal force, a tobacco shred image tightly attached to the transparent pipe wall is obtained through a high-speed imaging system arranged on the outer side of the bent pipe, and the size distribution and the speed distribution of the tobacco shreds are finally obtained after image processing.
The method monitors the size and speed of tobacco shreds by accessing branch pipes to perform intermittent sampling。
A cut tobacco size and speed real-time monitoring device based on elbow dilute phase pneumatic conveying high-speed imaging comprises a dilute phase cut tobacco conveying system, an image acquisition system, an image processing system, a cut tobacco recovery system and a PLC control system;
the dilute phase tobacco shred conveying system comprises a transparent bent pipe which is connected with a branch line of a tobacco shred conveying main pipeline and has an elliptical cross section and a vacuum dustproof fan arranged at the tail end of the bent pipe, wherein a check valve is arranged at the inlet end of the transparent bent pipe, and a funnel-shaped settling chamber for collecting tobacco shreds is arranged on a pipeline close to the vacuum dustproof fan; because the check valve is installed at the inlet of the elbow, the cut tobacco is opened when entering the elbow under the action of negative pressure, the vacuum dustproof fan is installed behind the funnel-shaped settling chamber and provides negative pressure for the image acquisition pipeline to enable the cut tobacco dilute phase to flow, and the lift of the vacuum dustproof fan can be adjusted by the frequency converter.
The image acquisition system comprises parallel light filling light source, high-speed camera, image acquisition card, data transmission line, and parallel light filling light source sets up in the return bend inboard and parallel with the camera optical axis, and high-speed camera sets up in the return bend outside and the oval pipe lateral surface center certain distance department of interlude and this oval pipe lateral wall of optical axis perpendicular to.
The PLC control system consists of two pressure sensors, an IO-LINK module, a PLC controller and a frequency converter, wherein the two pressure sensors are respectively arranged at the inlet end and the outlet end of the transparent bent pipe and are connected with the PLC controller through the IO-LINK module, and the PLC controller realizes the rotation speed control of the vacuum dustproof fan through the frequency converter;
the tobacco shred recycling system is arranged below the funnel-shaped settling chamber, is a recycling bin with a rectangular structure, and has the height of 300-800mm and the length and width of 300 x 600 mm.
The image processing system comprises a computer and an image acquisition and analysis program.
In the invention, the wall thickness of the selected elliptical tube is 1-5mm, the ratio of the long axis to the short axis is 2-5, and the length dimension of the long axis is 100-300 mm; the length of the inlet section pipeline is 400-800 mm; the length of the middle section and the outlet section is 200-400 mm; the inlet section pipeline and the outlet section pipeline form a 90-degree included angle; the included angle alpha between the inlet section pipeline and the tobacco shred pneumatic conveying pipeline is 90-150 degrees; the gas velocity in the tube is 30-50 m/s.
The elliptical tube made of transparent materials refers to a glass elliptical tube, an organic glass elliptical tube and a polymer elliptical tube.
The high-speed camera is positioned at the position of 500-1500mm away from the outer side of the elbow and the center of the outer side wall of the middle section oval tube, and the optical axis is vertical to the outer side wall of the oval tube; the image acquisition frame rate of the high-speed camera is more than 500fps, and the resolution is at least 1280 x 960. The high-speed camera can set image acquisition frequency and single acquisition duration, the sampling period interval is 10-30min, and each sampling time is 20-40 s.
The computer is an interactive hardware device which carries an image acquisition and analysis program and outputs an analysis result.
The image acquisition and analysis program has a tobacco shred shape acquisition function and an image analysis function, wherein the tobacco shred shape acquisition function is to acquire the tobacco shred shape in the transparent pipeline in real time through an image acquisition card and transmit the tobacco shred shape to a computer storage address end; the image analysis function can call real-time image data of the tobacco shreds, carry out correction, filtering and enhancement preprocessing on the image, carry out gray segmentation on tobacco shred areas in the image, extract and calculate length parameters of the tobacco shreds, and carry out statistical analysis on the sizes of the tobacco shreds detected in batches. Fig. 2 shows a cut tobacco image and a preprocessed cut tobacco binary image. The tobacco shred velocity vector field shown in figure 3 can be obtained by processing the tobacco shred image in unit time, and the tobacco shred velocity is calculated through the position information of the tobacco shred at different moments.
The specific process of measuring the cut tobacco size by using the device comprises the following steps:
(1) connecting a cut tobacco conveying system by a tee at a position of a main pipeline where the cut tobacco size needs to be measured, checking the operation condition of equipment, and sequentially installing other systems;
(2) turning on a light supplementing light source of the image acquisition system, setting acquisition frequency and single sampling time length in a high-speed camera and an image analysis program, and setting a PLC control period to be consistent with the period of the image acquisition system;
(3) after the main pipeline is stably conveyed, the PLC is opened;
(4) the PLC starts the fan according to the pressure difference of the two pressure sensors and adjusts the lift of the fan;
(5) the check valve is opened under the action of negative pressure, the cut tobacco enters the bent pipe, the cut tobacco is conveyed in the bent pipe in a dilute phase at the time, the speed is 30-50m/s, and the cut tobacco is adhered to the wall by centrifugal force in the camera view field and has no overlap;
(6) the image acquisition system starts image acquisition, and the acquired image is stored in the computer through a data transmission line;
(7) and the image acquisition and analysis program carries out recognition processing statistical analysis on the tobacco shred images in the sampling time length to obtain and output continuous tobacco shred length distribution and tobacco shred speed distribution.
(8) The pipe tobacco falls into the bottom of the funnel after settling and colliding because of the reduction of the pipe diameter increasing speed in the funnel-shaped settling chamber, and the bottom valve is opened at regular time to empty the pipe tobacco into the pipe tobacco recovery bin.
The invention has the advantages that:
(1) the invention considers the application scene of tobacco industry, the device can be connected into the actual pneumatic transmission pipeline in a conventional connection mode;
(2) the invention monitors the cut tobacco size by connecting the branch pipe to the pneumatic conveying pipeline for intermittent sampling, realizes the dilute-phase fluidized conveying of the cut tobacco in the branch pipe by adopting high flow velocity, is convenient for collecting images, and has little influence on the cut tobacco size and the material flow of the main pipeline.
(3) The method can realize rapid image acquisition, size calculation, speed calculation and statistical analysis of the cut tobacco, and has good real-time performance.
Drawings
FIG. 1 is a cut tobacco image and a preprocessed cut tobacco binary image, the left is the cut tobacco image, and the right is the preprocessed image;
FIG. 2 is a tobacco shred velocity vector field;
FIG. 3 is a schematic structural diagram of the device of the present invention,
in the figure: the method comprises the following steps of 1-bending pipe, 2-check valve, 3-funnel-shaped settling chamber, 4-vacuum dustproof fan, 5-high speed camera, 6-data transmission line, 7-computer, 8-image acquisition card, 9-main pipe for tobacco shred conveying, 10-tee joint 11-parallel light supplement light source, 12 a-inlet pressure sensor, 12 b-outlet pressure sensor, 13-IO-LINK module, 14-PLC controller, 15-frequency converter, 16-tobacco shred recovery bin and 17-gate valve.
Detailed Description
The detection device and method of the present invention are further described below with reference to the accompanying drawings:
a cut tobacco size and speed real-time monitoring method based on elbow dilute phase pneumatic conveying high-speed imaging is realized by the following modes: a transparent bent pipe with an oval cross section is connected to an upper line of a tobacco shred conveying main pipeline, a vacuum dustproof fan is connected to the other end of the transparent bent pipe, so that tobacco shreds are conveyed at a fluidization speed in the bent pipe to form a wall-adhering motion under the action of centrifugal force, a tobacco shred image tightly attached to the transparent pipe wall is obtained through a high-speed imaging system arranged on the outer side of the bent pipe, and the size distribution and the speed distribution of the tobacco shreds are finally obtained after image processing (see fig. 1 and 1).
The method monitors the size and the speed of the cut tobacco by accessing the branch pipe to perform an intermittent sampling mode.
The structure of the real-time monitoring device designed based on the method is shown in figure 3, and the real-time monitoring device comprises a dilute phase tobacco shred conveying system, an image acquisition system, an image processing system, a tobacco shred recycling system and a PLC control system;
the dilute phase tobacco shred conveying system comprises a transparent bent pipe 1 which is connected with a branch line of a tobacco shred conveying main pipeline 9 and has an elliptical cross section and a vacuum dustproof fan 4 arranged at the tail end of the bent pipe, wherein a check valve 2 is arranged at the inlet end of the transparent bent pipe, and the corner of the bent pipe can be a straight corner or an arc-shaped corner. A funnel-shaped settling chamber 3 for collecting the cut tobacco is arranged on the pipeline close to the vacuum dustproof fan; because the installation position of the check valve 2 is the inlet of the elbow pipe 1, the tobacco shreds are opened when entering the elbow pipe under the action of negative pressure, the vacuum dustproof fan 4 is installed behind the funnel-shaped settling chamber 3 and provides negative pressure for the image acquisition pipeline to enable the tobacco shreds to flow in dilute phase, and the lift of the vacuum dustproof fan can be adjusted by the frequency converter 15.
The image acquisition system comprises a parallel light supplement light source 11, a high-speed camera 5, an image acquisition card 8 and a data transmission line 6, wherein the parallel light supplement light source 11 is arranged on the inner side of the elbow and is parallel to the optical axis of the camera, the high-speed camera 5 is arranged on the outer side of the elbow and at a certain distance (500 plus 1500 mm) from the center of the outer side surface of the middle section elliptical tube, and the optical axis is perpendicular to the outer side wall of the elliptical tube. The image acquisition frame rate of the high-speed camera is more than 500fps, and the resolution is at least 1280 x 960. The high-speed camera can set image acquisition frequency and single acquisition duration, the sampling period interval is 10-30min, and each sampling time is 20-40 s.
The image processing system comprises a computer 7 and an image acquisition and analysis program.
The tobacco shred recycling system is arranged below the funnel-shaped settling chamber, is a tobacco shred recycling bin 16 with a rectangular structure, and has the height of 300-800mm and the length and the width of 300 x 600 mm.
The PLC control system consists of two pressure sensors (12a and 12b), an IO-LINK module 13, a PLC controller 14 and a frequency converter 15, wherein the two pressure sensors are respectively arranged at the inlet end and the outlet end of the transparent bent pipe and are connected with the PLC controller 14 through the IO-LINK module 13, and the PLC controller 14 realizes the rotation speed control of the vacuum dustproof fan 4 through the frequency converter 15; more specifically: the pressure sensors 12a and 12b are respectively positioned at the inlet end of the elbow pipe and the inlet end of the fan and are connected with the IO-LINK module 13 through signal lines. The IO-LINK module 13 converts the analog signal of the sensor into a digital signal and transmits the digital signal to the PLC controller 14. The PLC controller 14 adjusts the frequency of the frequency converter 13 according to the signal of the pressure sensor, and can realize periodic control. And the frequency converter 13 is controlled by the PLC 14 and is connected with the fan.
In the invention, the wall thickness of the selected elliptical tube is 1-5mm, the ratio of the long axis to the short axis is 2-5, and the length dimension of the long axis is 100-300 mm; the length of the inlet section pipeline is 400-800 mm; the length of the middle section and the outlet section is 200-400 mm; the inlet section pipeline and the outlet section pipeline form a 90-degree included angle; the included angle alpha between the inlet section pipeline and the tobacco shred pneumatic conveying pipeline is 90-150 degrees; the gas velocity in the tube is 30-50 m/s.
The computer is an interactive hardware device which carries an image acquisition and analysis program and outputs an analysis result.
The image acquisition and analysis program has a tobacco shred shape acquisition function and an image analysis function, wherein the tobacco shred shape acquisition function is to acquire the tobacco shred shape in the transparent pipeline in real time through an image acquisition card and transmit the tobacco shred shape to a computer storage address end; the image analysis function can call real-time image data of the tobacco shreds, carry out correction, filtering and enhancement preprocessing on the image, carry out gray segmentation on tobacco shred areas in the image, extract and calculate length parameters of the tobacco shreds, and carry out statistical analysis on the sizes of the tobacco shreds detected in batches. Fig. 2 shows a cut tobacco image and a preprocessed cut tobacco binary image. The tobacco shred velocity vector field shown in figure 3 can be obtained by processing the tobacco shred image in unit time, and the tobacco shred velocity is calculated through the position information of the tobacco shred at different moments.
The detection method using the device comprises the following specific processes:
1) connecting a cut tobacco conveying system by a tee at a position of a main pipeline where the cut tobacco size needs to be measured, checking the running state of equipment, and sequentially installing other systems;
2) turning on a parallel light supplement light source 11 of the image acquisition system, setting acquisition frequency and single sampling duration in the high-speed camera 5 and an image analysis program, setting a PLC control period to be consistent with the period of the image acquisition system, and setting a pressure difference rated value in a PLC control function;
3) after the main pipeline is stably conveyed, the PLC 14 is opened;
4) the PLC 14 starts the vacuum dustproof fan 4 according to the pressure difference of the two pressure sensors, and adjusts the lift of the fan;
5) the check valve 2 is opened under the action of negative pressure, the cut tobacco enters the bent pipe 1, the cut tobacco is conveyed in the bent pipe in a dilute phase at the time, the speed is 30-50m/s, and the cut tobacco is adhered to the wall by centrifugal force in the field of view of the camera and has no overlap;
6) the image acquisition system starts image acquisition, and the acquired image is stored in a computer 7 through a data transmission line 6;
7) the image acquisition and analysis program carries out recognition processing statistical analysis on the tobacco shred images in the sampling duration to obtain and output continuous distribution of tobacco shred length and tobacco shred speed distribution;
8) the speed of the tobacco shreds is reduced in the funnel-shaped settling chamber 3, the tobacco shreds fall into the bottom of the funnel after settling and colliding with the wall, and the bottom gate valve 17 is opened at regular time to empty the tobacco shreds into the tobacco shred recovery bin 16.
Example 1
In order to make those skilled in the art better understand the method and apparatus for detecting the size of the cut tobacco provided by the present invention, the following examples are combined to clearly and completely describe the technical solution of the present invention, and it is obvious that the described examples are only a part of embodiments of the present invention, and not all embodiments of the present invention.
And (3) turning on a light supplement light source of the high-speed camera system, setting the acquisition frequency of the high-speed camera 5 and an image acquisition analysis program to be 30 min/time, setting the single sampling time length to be 20s, and setting the working period of the PLC control system to be the same as the image acquisition frequency of the camera. According to the device and the method, the continuous distribution of the tobacco shred size and the tobacco shred speed distribution are obtained. And obtaining the weight fraction information of the required cut tobacco size by utilizing the continuous distribution of the cut tobacco size so as to guide production.
In conclusion, the invention establishes the device and the method for monitoring the size and the speed of the cut tobacco in real time based on the elbow dilute-phase pneumatic transmission high-speed imaging, and the device and the method can obtain the continuous distribution of the size and the speed information of the cut tobacco. The device is convenient to install, is suitable for actual industrial scenes, and provides an idea for the representation of the size and the speed of the cut tobacco in the pneumatic conveying process of cigarette production.
Claims (10)
1. A cut tobacco real-time monitoring method based on elbow dilute phase conveying high-speed imaging is characterized in that: the method is realized by the following steps: a transparent bent pipe with an oval cross section is connected to an upper line of a tobacco shred conveying main pipeline, a vacuum dustproof fan is connected to the other end of the transparent bent pipe, so that tobacco shreds are conveyed at a fluidization speed in the bent pipe to form a wall-adhering motion under the action of centrifugal force, a tobacco shred image tightly attached to the transparent pipe wall is obtained through a high-speed imaging system arranged on the outer side of the bent pipe, and the size distribution and the speed distribution of the tobacco shreds are finally obtained after image processing.
2. The cut tobacco real-time monitoring method based on elbow dilute-phase conveying high-speed imaging according to claim 1, characterized in that: the method monitors the size and the speed of the cut tobacco by accessing the branch pipe to perform an intermittent sampling mode.
3. The utility model provides a pipe tobacco real-time supervision device based on high-speed formation of image is carried to return bend dilute phase which characterized in that: the device comprises a dilute phase tobacco shred conveying system, an image acquisition system, an image processing system, a tobacco shred recycling system and a PLC control system;
the dilute phase tobacco shred conveying system comprises a transparent bent pipe which is connected with a branch line of a tobacco shred conveying main pipeline and has an elliptical cross section and a vacuum dustproof fan arranged at the tail end of the bent pipe, wherein a check valve is arranged at the inlet end of the transparent bent pipe, and a funnel-shaped settling chamber for collecting tobacco shreds is arranged on a pipeline close to the vacuum dustproof fan;
the image acquisition system consists of a parallel light supplementing light source, a high-speed camera, an image acquisition card and a data transmission line, wherein the parallel light supplementing light source is arranged on the inner side of the elbow and is parallel to the optical axis of the camera, the high-speed camera is arranged on the outer side of the elbow and at a certain distance from the center of the outer side surface of the middle section elliptical tube, and the optical axis is vertical to the outer side wall of the elliptical tube,
the PLC control system consists of two pressure sensors, an IO-LINK module, a PLC controller and a frequency converter, wherein the two pressure sensors are respectively arranged at the inlet end and the outlet end of the transparent bent pipe and are connected with the PLC controller through the IO-LINK module, and the PLC controller realizes the rotation speed control of the vacuum dustproof fan through the frequency converter;
and the cut tobacco recovery system is arranged below the funnel-shaped settling chamber.
4. The cut tobacco real-time monitoring device based on elbow dilute-phase conveying high-speed imaging is characterized in that: the image processing system comprises a computer and an image acquisition and analysis program.
5. The cut tobacco real-time monitoring device based on elbow dilute-phase conveying high-speed imaging is characterized in that: the tobacco shred recycling system is a recycling bin with a rectangular structure, the height of the recycling bin is 300-800mm, and the length and the width of the recycling bin are 300-600 mm.
6. The cut tobacco real-time monitoring device based on elbow dilute-phase conveying high-speed imaging is characterized in that: the wall thickness of the selected elliptical tube is 1-5mm, the ratio of the long axis to the short axis is 2-5, and the length dimension of the long axis is 100-300 mm; the length of the inlet section pipeline is 400-800 mm; the length of the middle section and the outlet section is 200-400 mm; the inlet section pipeline and the outlet section pipeline form a 90-degree included angle; the included angle alpha between the inlet section pipeline and the tobacco shred pneumatic conveying pipeline is 90-150 degrees; the gas velocity in the tube is 30-50 m/s.
7. The cut tobacco real-time monitoring device based on elbow dilute-phase conveying high-speed imaging is characterized in that: the elliptical tube made of transparent materials refers to a glass elliptical tube, an organic glass elliptical tube and a polymer elliptical tube.
8. The cut tobacco real-time monitoring device based on elbow dilute-phase conveying high-speed imaging is characterized in that: the high-speed camera is positioned at the position of 500-1500mm away from the outer side of the elbow and the center of the outer side wall of the middle section elliptical tube, and the optical axis is vertical to the outer side wall of the elliptical tube; the image acquisition frame rate of the high-speed camera is more than 500fps, and the resolution is at least 1280 x 960; the high-speed camera can set image acquisition frequency and single acquisition duration, the sampling period interval is 10-30min, and each sampling time is 20-40 s.
9. The cut tobacco real-time monitoring device based on elbow dilute-phase conveying high-speed imaging is characterized in that: the computer is an interactive hardware device which carries an image acquisition and analysis program and outputs an analysis result.
10. The cut tobacco real-time monitoring device based on elbow dilute-phase conveying high-speed imaging is characterized in that: the image acquisition and analysis program has a tobacco shred shape acquisition function and an image analysis function, wherein the tobacco shred shape acquisition function is to acquire the tobacco shred shape in the transparent pipeline in real time through an image acquisition card and transmit the tobacco shred shape to a computer storage address end; the image analysis function can call real-time image data of the tobacco shreds, carry out correction, filtering and enhancement preprocessing on the image, carry out gray segmentation on tobacco shred areas in the image, extract and calculate length parameters of the tobacco shreds, and carry out statistical analysis on the sizes of the tobacco shreds detected in batches.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116399747A (en) * | 2023-06-07 | 2023-07-07 | 山东科技大学 | Pneumatic conveying system elbow performance detection platform and method |
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| DE10332869A1 (en) * | 2003-07-19 | 2005-02-17 | Riedel Filtertechnik Gmbh | Pneumatic conveyor for e.g. cut tobacco, comprises conveyor tube, to which separator is connected, suction tube being connected on its opposite side which is fitted with throttle valve controlled by pressure sensors |
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| CN214692161U (en) * | 2021-05-19 | 2021-11-12 | 中国烟草总公司郑州烟草研究院 | Cut tobacco real-time monitoring device based on elbow dilute phase conveying high-speed imaging |
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2021
- 2021-05-19 CN CN202110545684.3A patent/CN113086653A/en active Pending
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| DE10332869A1 (en) * | 2003-07-19 | 2005-02-17 | Riedel Filtertechnik Gmbh | Pneumatic conveyor for e.g. cut tobacco, comprises conveyor tube, to which separator is connected, suction tube being connected on its opposite side which is fitted with throttle valve controlled by pressure sensors |
| CN107510094A (en) * | 2017-10-13 | 2017-12-26 | 南京睿都电气技术有限公司 | A kind of tobacco thread by wind force carrying method and device |
| CN110940826A (en) * | 2019-12-20 | 2020-03-31 | 中国烟草总公司郑州烟草研究院 | Method for detecting tobacco shred movement speed in horizontal pipe dense-phase tobacco shred pneumatic conveying process |
| CN111579448A (en) * | 2020-06-19 | 2020-08-25 | 大连理工大学 | Powder particle motion state online detection device and method |
| CN214692161U (en) * | 2021-05-19 | 2021-11-12 | 中国烟草总公司郑州烟草研究院 | Cut tobacco real-time monitoring device based on elbow dilute phase conveying high-speed imaging |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116399747A (en) * | 2023-06-07 | 2023-07-07 | 山东科技大学 | Pneumatic conveying system elbow performance detection platform and method |
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