CN103084339B - Free falling type tobacco leaf sorting device and tobacco leaf sorting method - Google Patents
Free falling type tobacco leaf sorting device and tobacco leaf sorting method Download PDFInfo
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- CN103084339B CN103084339B CN201210581693.9A CN201210581693A CN103084339B CN 103084339 B CN103084339 B CN 103084339B CN 201210581693 A CN201210581693 A CN 201210581693A CN 103084339 B CN103084339 B CN 103084339B
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Abstract
The invention discloses a free falling type tobacco leaf sorting device and a tobacco leaf sorting method. The method comprises the following steps: enabling a tobacco leaf to fall down to a slide groove (4) from a conveying device and slide to a detection region in an accelerated manner through the slide groove; photographing an image of a tobacco leaf passing through the detection region by utilizing a CCD (Charge Coupled Device) photographing device; processing and identifying the image of the tobacco leaf through an image identification module; if identifying that the current tobacco leaf is unqualified, starting a solenoid valve in an air blowing eliminating device and blowing the current tobacco leaf to a rejection material groove (2) through a blowing nozzle (14); and otherwise, when the blowing nozzle (14) does not blow the air, enabling the tobacco leaf to freely fall down to an allowed material receiving groove (8) so as to realize the sorting of the tobacco leaf. The free falling type tobacco leaf sorting device and the tobacco leaf sorting method disclosed by the invention have the advantages of high sorting efficiency and high automation degree.
Description
Technical field
The present invention relates to a kind of free-falling formula tobacco leaf sorting device and tobacco leaf sorting method.
Background technology
At present in cigarette is produced, mainly adopt manually selected mode to ensure product quality.The artificial dressing process of sheet cigarette utilizes manually to carry out manual rejecting to the underproof tobacco leaves such as " blue or green, mould, assorted " in sheet cigarette and foreign material.Underproof tobacco leaf and the content of foreign material in sheet cigarette very low, cause exactly and existingly select the main cause that pattern labo r usage is large, operating efficiency is low.This manual pattern rejected causes that personnel depaly is huge, difficult management on the one hand, on the other hand huge the and personnel's stable problem of the cost of labor chief threat that also become restriction high-quality cigarette to develop.
Therefore, need a kind of that efficiently, reduce artificial input amount, stable tobacco leaf sorting device and mode badly to replace existing artificial screening pattern, this also becomes the key that production capacity increases.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of free-falling formula tobacco leaf sorting device and tobacco leaf sorting method, this free-falling formula tobacco leaf sorting device and the tobacco leaf sorting method efficiency of separation is high, automaticity is high.
The technical solution of invention is as follows:
A kind of tobacco leaf sorting device of free-falling formula, it is characterized in that, comprise conveying device, framework (1), chute (4), reject hopper (2), permit receiving vat (8), camera head, background roller (6), picture recognition module and air blowing device for eliminating; Chute (4), rejection hopper (2), fair receiving vat (8) and camera head are installed on framework (1);
Conveying device is connected with the entrance of chute (4), and background roller (6) is arranged on below the outlet of chute (4); Camera head is positioned at the sidepiece of background roller (6), and the light inlet of camera head is just to background roller (6); Permit receiving vat (8) to be arranged on background roller (6) below, reject the sidepiece both sides that hopper (2) is arranged on background roller (6) below;
Device for eliminating comprises blow gun (14) and the magnetic valve (13) controlling this blow gun (14) gas path on-off, and magnetic valve (13) communicates with source of the gas; Blow gun (14) be arranged on background roller (6) and reject hopper (2) suitable for reading between sidepiece; When blow gun (14) is blown, tobacco leaf is blown in rejection hopper (2); When blow gun (14) is not blown, tobacco leaf free falling is to permitting in receiving vat (8);
Camera head exports the tobacco leaf image information of catching to picture recognition module, and magnetic valve (13) is controlled by the output signal of picture recognition module.
Background roller (6) is two and is laterally arranged side by side; Camera head is two covers and divides the both sides being located at 2 background rollers (6), the light inlet of 2 cover camera heads is respectively just to 2 background rollers (6), and every suit camera head all contains digital camera (9) and is positioned at the LED light source (11) of camera head front end.
Two cover camera heads are the first camera head (3) and the second camera head (5), and the first camera head (3) entirety is L shape, and is provided with reflective mirror in turning point; Second camera head (5) entirety is linear.
Camera head is provided with the admission line interface for introducing air-flow from outside.[entering from light entrance for stoping dust, tobacco leaf and foreign material]
When the tobacco leaf sorting device of free-falling formula works, background roller (6) rotates under the driving of motor.
A kind of tobacco leaf sorting method of the tobacco leaf sorting device based on aforesaid free-falling formula, tobacco leaf is made to drop on chute (4) from conveying device, under chute accelerates, slide to surveyed area, adopt the shooting of CCD camera head through the tobacco leaf image of surveyed area; By picture recognition module tobacco leaf image processed and identify, if identifying current tobacco leaf is not defective tobacco leaf, then starting the magnetic valve in air blowing device for eliminating, by blow gun (14), current tobacco leaf being blown in rejection hopper (2); Otherwise when blow gun (14) is not blown, tobacco leaf free falling to permitting in receiving vat (8), thus realizes the sorting of tobacco leaf;
Camera head is provided with admission line interface, introduces air-flow, form outside air-flow in camera head porch from outside, stops foreign material to enter from camera head entrance, to avoid when machine operation foreign material to the interference of camera head.
Beneficial effect:
Free-falling formula tobacco leaf sorting device of the present invention and tobacco leaf sorting method, be applied in tobacco leaf refining process, for by the smoked sheet automatic rejection containing " blue or green, mould, stem, mix " in tobacco leaf to be selected, is a kind of solution of Intelligent Recognition.
The present invention utilizes the principle of tobacco leaf free-falling in certain initial velocity situation, in the process of tobacco leaf free-falling, arranges a free-falling track (i.e. passage).When tobacco leaf disorbit falls to certain distance, the intelligent detection device being distributed in track both sides will work, the tobacco leaf of this position is detected, the tobacco leaf of " blue or green, mould, stem, assorted " is wherein marked, and by signal transmission to air blowing device for eliminating, when underproof tobacco leaf and impurity fall to valve height, the magnetic valve of air blowing device for eliminating will work.Underproof tobacco leaf and impurity enter along the airflow direction parabola of blow gun to be rejected in hopper, along the landing of rejection hopper on defective work belt conveyer.Qualified tobacco leaf then enters in fair receiving vat along the track of whereabouts track, along fair receiving vat landing on certified products belt conveyer.
In described intelligent detection device, for ensureing the sealing that detecting portion is strict, adopting the mode of supercharging dedusting, ensureing the clean of the Lights section, the dust in minimizing environment is to the interference of checkout gear.In described rejection hopper, the mode of negative pressure is adopted to remove impurity in defective tobacco leaf and dust.
In sum, the present invention be a kind of utilize free-falling to be principle intelligent detection device and method, efficiency improves a lot than manual method, can reject the defective work in tobacco leaf and impurity effectively, at high speed; Reject precisely, the qualified tobacco leaf amount of taking out of is few; Reduce labour intensity and the time of workman, decrease the configuration of personnel; Gases at high pressure are utilized to reject defective work and impurity, on material without impact; Adopt high-pressure dust-cleaning and strict sealing, ensure that the judgement of vision system, disposal ability; Adopt vision imaging principle to carry out detection and Identification, be applicable to tobacco business.After adopting tobacco leaf sorting device and method of the present invention, effectively can solve the problem that defective work and foreign material in tobacco leaf are too much, thus improve productivity ratio, realize the processing to efficient tobacco, principle is simple, easily manufactured, dependable performance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Fig. 2 is nozzle in device for eliminating of the present invention, the distribution of magnetic valve, Pareto diagram;
Fig. 3 is A-A sectional view in Fig. 2
Fig. 4 is the structure chart of the first camera head 3 in the present invention
Fig. 5 is that tobacco leaf is by the schematic diagram in the tobacco leaf sorting device of this free-falling formula.
Detailed description of the invention
Below with reference to the drawings and specific embodiments, the present invention is described in further details:
Embodiment 1:
As Fig. 1-5, a kind of tobacco leaf sorting device of free-falling formula, is characterized in that, comprises conveying device, framework 1, chute 4, rejects hopper 2, permits receiving vat 8, camera head, background roller 6, picture recognition module and air blowing device for eliminating; Chute 4, rejection hopper 2, fair receiving vat 8 and camera head are installed on framework 1;
Conveying device is connected with the entrance of chute 4, and background roller 6 is arranged on below the outlet of chute 4; Camera head is positioned at the sidepiece of background roller 6, and the light inlet of camera head is just to background roller 6; Permit receiving vat 8 to be arranged on below background roller 6, rejection hopper 2 is arranged on the sidepiece both sides below background roller 6;
Device for eliminating comprises blow gun 14 and the magnetic valve 13 controlling this blow gun 14 gas path on-off, and magnetic valve 13 communicates with source of the gas; Blow gun 14 be arranged on background roller 6 and reject hopper 2 suitable for reading between sidepiece; When blow gun 14 is blown, tobacco leaf is blown in rejection hopper 2; When blow gun 14 is not blown, tobacco leaf free falling is to permitting in receiving vat 8;
Camera head exports the tobacco leaf image information of catching to picture recognition module, and magnetic valve 13 is controlled by the output signal of picture recognition module.
Background roller 6 is two and is laterally arranged side by side; Camera head is two covers and divides the both sides being located at 2 background rollers 6, and the light inlet of 2 cover camera heads is respectively just to 2 background rollers 6, and every suit camera head all contains digital camera 9 and is positioned at the LED light source 11 of camera head front end.
Camera head is provided with the admission line interface for introducing air-flow from outside.[entering from light entrance for stoping dust, tobacco leaf and foreign material]
Based on a tobacco leaf sorting method for the tobacco leaf sorting device of aforesaid free-falling formula, make tobacco leaf drop on chute 4 from conveying device, under chute accelerates, slide to surveyed area, adopt the shooting of CCD camera head through the tobacco leaf image of surveyed area; By picture recognition module tobacco leaf image processed and identify, if identifying current tobacco leaf is not defective tobacco leaf, then starting the magnetic valve in air blowing device for eliminating, by blow gun 14, current tobacco leaf being blown in rejection hopper 2; Otherwise when blow gun 14 is not blown, tobacco leaf free falling to permitting in receiving vat 8, thus realizes the sorting of tobacco leaf;
Camera head is provided with admission line interface, introduces air-flow, form outside air-flow in camera head porch from outside, stops foreign material to enter from camera head entrance, to avoid when machine operation foreign material to the interference of camera head.
As shown in Figure 1, the tobacco leaf sorting device of a kind of free-falling formula of the present invention comprises conveying device (meaning not shown in the figures out), framework 1, rejection hopper 2, first camera head 3, chute 4, second camera head 5, background roller 6, gas bag 7, permits receiving vat 8 and picture recognition module.Detected tobacco leaf is transported to the top of chute 4 entrance by belt conveyor, tobacco leaf is under certain initial velocity, and on chute 4, specific track does the movement of falling object.When tobacco leaf leaves the outlet of chute 4, free-falling certain altitude, arrive test point position, be distributed in the image detection device of test point both sides, namely the first camera head 3 and the second camera head 5 are started working.By the tobacco leaf after test point detection and Identification, be divided into two parts, a part is certified products, and another part is defective work and foreign material.Qualified tobacco leaf falls in fair receiving vat 8 along the track on chute 4, then slips into belt conveyer along fair receiving vat 8, sends into subsequent processing.Underproof tobacco leaf and foreign material, after being detected and identifying, when free-falling is to gas bag 7 position, magnetic valve 13 on gas bag 7 is started working, defective work and foreign material enter into along the airflow direction parabola of blow gun 14 to be rejected in hopper 2, slide on belt conveyer along rejection hopper 2 again, send into subsequent processing.
The gas bag that whole rejecting mechanism is made up of magnetic valve, blow gun, aluminium section bar forms, gas bag or be air cavity, form compressed-air actuated storage container, magnetic valve is controlled device, open when needed and can discharge compressed air, blow gun determine compressed air blowout time air flow stream shape and angle)
There is the leg of rubber bottom framework 1, can cushioning effect be played, and certain height can be regulated, thus ensure that on framework 1, corresponding installation site is at registration.
Rejecting hopper 2 and be provided with air-flow evacuation mesh and air entry, namely after the air-flow of gas bag 7 nozzle ejection enters rejection hopper, is the gas outlet preventing it from arranging the impact of dedusting; Air entry is the principle using negative pressure, the dust in defective tobacco leaf and partial impurities is removed.Reject hopper can on the hopper pillar of both sides Level tune position.
As shown in Figure 4, the first camera head 3 is placed on to be rejected directly over hopper 2, and this device inside is provided with digital camera 9, reflective mirror 10 and lighting source 11; Transparent glass (transparent glass mainly prevents foreign matter and dust from entering, the camera lens in protection camera head and sensitive chip) mounting plate of bottom of camera is equipped with; Reflective mirror 10 and LED illumination light source 11 all aim at the tobacco leaf of free-falling; Reflection ray and incident ray angle in 90 °; The reflected light path of reflective mirror 10 is provided with digital camera 9; The signal output part of digital camera 9 is connected with the signals collecting end of image recognition processing module 16; Lighting source 11 comprises I LED and II LED, and they are placed on the both sides of reflective mirror 10 to whereabouts tobacco leaf incident ray respectively, and namely lighting source 11 provides illumination for reflective mirror 10, and the tobacco leaf caused to fall and break is high-visible; Two groups of light sources are arranged symmetrically with about incident ray, make the tobacco leaf of illuminating ray to test point become most suitable angle; The tobacco leaf situation that lighting source is irradiated to by reflective mirror 10 reflexes in the camera lens of digital camera 9, digital camera 9 completes the shooting of tobacco leaf picture, and be transferred to image recognition processing module 16 and carry out analyzing, process, calculate, show that whether tobacco leaf is qualified, have the information such as the particular location of no-sundries and underproof tobacco leaf and foreign material.
First camera head 3 and the second camera head 5 there is admission line interface, air-flow is introduced from outside, outside air-flow is formed in the porch of light source, dust, tobacco leaf and foreign material are stoped to enter from light entrance, when machine operation, the impact on transparent glass of the factor such as dust and tobacco leaf can be reduced, reduce external interference, thus ensure that the judgment of vision.
Chute 4 is arranged on directly over the first camera head 3, second camera head 5 and background roller 6, and the biside plate of chute 4 is provided with notch, is used for placing stainless steel chute track supporting plate; Whole chute 4 is a modular entirety, can level and vertically regulating on framework 1 again, easy for installation, safeguards simple.
Background roller be used for when detection zone do not have tobacco leaf by time or tobacco leaf between have a space time, the background background of background roller reverberation formation that what camera head photographed is.Background roller is designed to cylindrical, can roll, and falls dust on background roller so once in a while and tobacco leaf would not rest on background roller.
Background roller 6, is made up of I background roller and II background roller, is arranged on immediately below chute 4; The center of I background roller is arranged on the extended line of the reflection ray of digital camera 9 to test point tobacco leaf in the second camera head 5; The center of II background roller is arranged on the extended line of the reflection ray of reflective mirror 10 to test point tobacco leaf in the first camera head 3; Two background rollers are separate, provide power, keep identical speed to do uniform rotation, background roller has the coating of special pigment by two identical motors, ensure the clearly visible of tobacco leaf and foreign material.Use 2 cover video cameras to take tobacco leaf positive and negative, can obtain the positive and negative image of tobacco leaf, one side has underproof flaw also can detect arbitrarily.
As shown in Figure 2,3, immediately below side camera head 5, device for eliminating is installed.Device for eliminating is made up of air cavity, magnetic valve, nozzle.Magnetic valve 13 and nozzle 14 are fixed on magnetic valve installing plate, magnetic valve 13 arrangement in yi word pattern on a mounting board, equal and the one_to_one corresponding of pore quantity on magnetic valve 13 and nozzle 14, nozzle 14 is communicated with the air cavity of storing compressed air by magnetic valve 14, nozzle 14 aims at tobacco leaf and the foreign material of free-falling, the controlled end of magnetic valve 13 is connected with the solenoid valve driving module of image recognition processing module, nozzle 14 horizontal positioned, the length of nozzle 14 is slightly larger than the effective width of chute 4, ensure have the hole on nozzle 14 corresponding with it by the tobacco leaf after chute and foreign material.The air-flow blow-off direction of nozzle 14 is vertical with the direction of foreign material free-falling with tobacco leaf, i.e. horizontal direction, this obtains according to the parabolical landing trajectory calculation of the air-flow blow-off direction of nozzle 14, can ensure that underproof tobacco leaf and foreign material are blown on the slideway in rejection hopper by nozzle 14, being slipped to substandard products along slideway reclaims on belt feeder, and substandard products reclaim belt feeder and do not illustrate out in the drawings.After magnetic valve 13 obtains the opening information of solenoid valve driving module, then started immediately by underproof tobacco leaf and magnetic valve 13 corresponding to foreign material, blow away underproof tobacco leaf and foreign material.
Described image recognition processing module comprises digital camera 9 and image processing module, and image processing module is connected with solenoid valve driving module respectively at human-computer exchange system, and solenoid valve driving module is connected with each magnetic valve 13.Described digital video camera 9 is digital linear array CCD camera; Image processing module is FPGA+DSP image processing hardware platform.
Human-computer exchange system comprises display screen and input keyboard, and the information of tobacco leaf to be detected, by input through keyboard, display screen then shows the information of the various tobacco leaves of input, as color, shape, size etc.First the parameter value of the qualified tobacco leaf demand fulfillment of input through keyboard is passed through, again by the information transmission of qualified for part tobacco leaf to intelligent image processing module, image processing module analyzes the characteristic parameter of these qualified tobacco leaves, is then transferred in human-computer exchange system by these characteristic parameters.Constantly revised by the characteristic ginseng value of the qualified tobacco leaf of reality, adjust the intrasystem qualified tobacco leaf parameter value of human-computer exchange, until obtain the parameter value of desirable qualified tobacco leaf, then be fixed in human-computer exchange system.Meanwhile, the parameter value of the desirable qualified tobacco leaf finally obtained also is stored in intelligent image processing module.
The tobacco leaf image collected is passed to image processing module by described digital video camera 9, image processing module is according to characteristic parameters such as color, shape, sizes, make comparisons with the parameter value of the desirable certified products be stored in before in image processing module, identify underproof tobacco leaf and foreign material exactly, and drive solenoid valve driving module, solenoid valve driving module is after receiving the signal of image processing module, and the accurate magnetic valve 13 of correspondence that drives works automatically, rejects it.Image processing part belongs to prior art.
Fig. 5 is that tobacco leaf is by the schematic diagram in the tobacco leaf sorting device of this free-falling formula, background roller is rotatable, motor is fixed with in a side end face, Fig. 1 is the view looked in from outward, the cylinder background parts of background roller has been covered by motor, and Fig. 5 is the sectional view of equipment, the cylinder end face of background roller can be seen.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from this device operation principle; can also make some improvement and optimization, these improve and optimize and also should be considered as within protection scope of the present invention.
Claims (5)
1. the tobacco leaf sorting device of a free-falling formula, it is characterized in that, comprise conveying device, framework (1), chute (4), reject hopper (2), permit receiving vat (8), camera head, background roller (6), picture recognition module and air blowing device for eliminating; Chute (4), rejection hopper (2), fair receiving vat (8) and camera head are installed on framework (1);
Conveying device is connected with the entrance of chute (4), and background roller (6) is arranged on below the outlet of chute (4); Camera head is positioned at the sidepiece of background roller (6), and the light inlet of camera head is just to background roller (6); Permit receiving vat (8) to be arranged on background roller (6) below, reject the sidepiece both sides that hopper (2) is arranged on background roller (6) below; When the tobacco leaf sorting device of free-falling formula works, background roller (6) rotates under the driving of motor;
Device for eliminating comprises blow gun (14) and the magnetic valve (13) controlling this blow gun (14) gas path on-off, and magnetic valve (13) communicates with source of the gas; Blow gun (14) be arranged on background roller (6) and reject hopper (2) suitable for reading between sidepiece; When blow gun (14) is blown, tobacco leaf is blown in rejection hopper (2); When blow gun (14) is not blown, tobacco leaf free falling is to permitting in receiving vat (8); Camera head exports the tobacco leaf image information of catching to picture recognition module, and magnetic valve (13) is controlled by the output signal of picture recognition module.
2. the tobacco leaf sorting device of free-falling formula according to claim 1, is characterized in that, background roller (6) is two and is laterally arranged side by side; Camera head is two covers and divides the both sides being located at 2 background rollers (6), the light inlet of 2 cover camera heads is respectively just to 2 background rollers (6), and every suit camera head all contains digital camera (9) and is positioned at the LED light source (11) of camera head front end.
3. the tobacco leaf sorting device of free-falling formula according to claim 2, it is characterized in that, two cover camera heads are the first camera head (3) and the second camera head (5), and the first camera head (3) entirety is L shape, and is provided with reflective mirror in turning point; Second camera head (5) entirety is linear.
4. the tobacco leaf sorting device of the free-falling formula according to any one of claim 1-3, is characterized in that, camera head is provided with the admission line interface for introducing air-flow from outside.
5. the tobacco leaf sorting method based on the tobacco leaf sorting device of free-falling formula according to claim 4, it is characterized in that, tobacco leaf is made to drop on chute (4) from conveying device, under chute accelerates, slide to surveyed area, adopt the shooting of CCD camera head through the tobacco leaf image of surveyed area; By picture recognition module tobacco leaf image processed and identify, if identifying current tobacco leaf is not defective tobacco leaf, then starting the magnetic valve in air blowing device for eliminating, by blow gun (14), current tobacco leaf being blown in rejection hopper (2); Otherwise when blow gun (14) is not blown, tobacco leaf free falling to permitting in receiving vat (8), thus realizes the sorting of tobacco leaf;
Camera head is provided with admission line interface, introduces air-flow, form outside air-flow in camera head porch from outside, stops foreign material to enter from camera head entrance, to avoid when machine operation foreign material to the interference of camera head.
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| CN201210581693.9A CN103084339B (en) | 2012-12-28 | 2012-12-28 | Free falling type tobacco leaf sorting device and tobacco leaf sorting method |
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| CN201210581693.9A CN103084339B (en) | 2012-12-28 | 2012-12-28 | Free falling type tobacco leaf sorting device and tobacco leaf sorting method |
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| CN103084339B true CN103084339B (en) | 2014-12-17 |
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| CN105242568B (en) * | 2015-10-09 | 2018-02-13 | 东南大学 | Tobacco leaf based on Digital Image Processing accurately rejects control method |
| CN110090818B (en) * | 2019-04-19 | 2020-09-01 | 浙江大学 | High-precision airflow self-adaptive control method for intelligent color sorting equipment |
| CN113554588A (en) * | 2021-06-02 | 2021-10-26 | 深圳市科视创科技有限公司 | Product flaw detection device and method |
| CN113317548B (en) * | 2021-06-10 | 2022-09-13 | 广东中烟工业有限责任公司 | Threshing and redrying impurity removal device, method, equipment and medium |
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| DE3620735A1 (en) * | 1986-06-20 | 1987-12-23 | Focke & Co | METHOD AND DEVICE FOR DISCONNECTING DEFECTIVE CIGARETTES IN CONNECTION WITH A CIGARETTE PACKING MACHINE |
| ITRM20040297A1 (en) * | 2004-06-17 | 2004-09-17 | Sorain Cecchini Ambiente Sca Spa | METHOD FOR THE REALIZATION OF INTEGRAL RECYCLING WITH LOW ENVIRONMENTAL IMPACT OF SOLID URBAN WASTE AND IMPLEMENTATION DEVICES. |
| CN2728648Y (en) * | 2004-09-06 | 2005-09-28 | 贵阳普天万向物流技术股份有限公司 | Belt type sorting mechanism |
| FR2892189B1 (en) * | 2005-10-18 | 2007-12-21 | Cogema | SAMPLE SIZING BY DIAMETER MEASUREMENT |
| CN201370092Y (en) * | 2009-03-09 | 2009-12-30 | 南京文采科技有限责任公司 | Detection and elimination device for cigarette paper |
| CN101862733A (en) * | 2010-03-18 | 2010-10-20 | 苏州工业园区高登威科技有限公司 | Automatic separation device |
| CN102029263A (en) * | 2010-11-19 | 2011-04-27 | 南京文采科技有限责任公司 | Device for detecting stems in leaves and removing stems from leaves |
| CN203124289U (en) * | 2012-12-28 | 2013-08-14 | 湖南中烟工业有限责任公司 | Free falling type tobacco sorting unit |
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