EP3510877B1 - Dispositif et procédé de vérification des articles en forme de boudin de l'industrie de traitement du tabac - Google Patents

Dispositif et procédé de vérification des articles en forme de boudin de l'industrie de traitement du tabac Download PDF

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Publication number
EP3510877B1
EP3510877B1 EP19150463.8A EP19150463A EP3510877B1 EP 3510877 B1 EP3510877 B1 EP 3510877B1 EP 19150463 A EP19150463 A EP 19150463A EP 3510877 B1 EP3510877 B1 EP 3510877B1
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EP
European Patent Office
Prior art keywords
rod
cameras
shaped items
image
conveying
Prior art date
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EP19150463.8A
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German (de)
English (en)
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EP3510877A3 (fr
EP3510877A2 (fr
Inventor
Akram El Jarad
Piotr KOLESNIKOFF
Manfred Folger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koerber Technologies GmbH
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Koerber Technologies GmbH
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Publication of EP3510877A3 publication Critical patent/EP3510877A3/fr
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Classifications

    • 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
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
    • A24C5/3412—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes by means of light, radiation or electrostatic fields
    • 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
    • A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
    • A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
    • 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
    • A24C5/47—Attaching filters or mouthpieces to cigars or cigarettes, e.g. inserting filters into cigarettes or their mouthpieces
    • A24C5/478—Transport means for filter- or cigarette-rods in view of their assembling
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/02—Manufacture of tobacco smoke filters
    • A24D3/0295—Process control means

Definitions

  • the invention relates to a device in the tobacco processing industry for optically inspecting rod-shaped articles in the tobacco processing industry, the rod-shaped articles each being a combination of a plurality of segments, and the device comprising a conveying element for transversely axial conveying of the rod-shaped articles and the conveying element comprising a plurality of receiving troughs, in which the rod-shaped articles can be received or are received, the device further comprising an image detection device with which the rod-shaped articles arranged in the receiving troughs can be detected or are detected during the transverse-axial conveyance.
  • the invention also relates to a method for optically inspecting rod-shaped articles in the tobacco processing industry, with the rod-shaped articles each being an assembly of several segments and being conveyed transversely axially by a conveying element in a receiving trough of the conveying element.
  • Rod-shaped articles of the tobacco processing industry which are a compilation are made up of several segments are known, for example, as multi-segment filters.
  • errors can occur, for example swapping filter segments, a missing filter segment, an incorrect position or inserting a filter segment with the wrong length.
  • gaps can occur between filter segments or the filter segments can be tilted relative to one another.
  • the EP 1 769 689 A1 a device for measuring properties of multi-segment filters or combinations of filter segments in the tobacco processing industry.
  • the multi-segment filter arrangement is illuminated with a line laser.
  • the light reflected on the surface of the filter segments is received using a line camera, and the data recorded by the line camera is evaluated accordingly.
  • Another device in which multi-segment filters are tested during cross-axial promotion on a conveyor drum is, for example, from DE 10 2009 041 320 A1 famous.
  • the conveyor drum is provided with a lighting device.
  • the multi-segment filters are accommodated in a slotted receptacle, for example a receptacle trough, of this conveying element.
  • a sensor device that is also provided picks up the radiation shining through the multi-segment filter or through the arrangement of a plurality of segments present in the receiving trough. Observation takes place via a mirror, the emitted radiation is collimated using a lens and directed to a CCD camera. In this transmitted light method, filter segments filled with activated carbon are particularly easy to detect.
  • a device for optically checking articles in the tobacco processing industry which comprises an image acquisition device with at least one image sensor and at least one light source for illuminating the article to be checked.
  • the image capturing device comprises a plurality of image sensors arranged next to one another, for example in one or more rows.
  • Each of the image sensors is assigned a cylindrical lens with a rectangular cross-sectional area, which is designed, for example, as a plano-concave cylindrical lens or as a combination of plano-convex and concave cylindrical lenses.
  • DE-A1-10 2016 107 247 discloses the preamble of claim 1.
  • a line camera with a very high resolution would be required in the conventional solutions mentioned above.
  • the segment arrangement would have to be imaged on the line scan camera without distortion or distortion, which requires telecentric optics.
  • telecentric optics With telecentric optics, the light bundles from the observed object area enter the front lens of the objective parallel to the optical axis. For this reason, a telecentric lens is required to have a front lens that is as large as or larger than a maximum size of the object to be viewed. This requirement means, among other things, that telecentric optics are very expensive.
  • telecentric optics are quite large and heavy, so that the design effort to implement the measurement arrangement is correspondingly complex and expensive.
  • a large installation space is required, which in practice often leads to problems in the implementation.
  • the object of the present invention is to provide a device in the tobacco processing industry for optically inspecting rod-shaped articles in the tobacco processing industry and a method for optically inspecting rod-shaped articles in the tobacco processing industry, with which an exact examination of the rod-shaped articles can be carried out with high Resolution can be made, but the design effort should be kept low.
  • the object is achieved by a device in the tobacco processing industry for optically inspecting rod-shaped articles in the tobacco processing industry, the rod-shaped articles each being a combination of several segments, and the device comprising a conveying element for transversely axial conveying of the rod-shaped articles and the conveying element comprises a plurality of receiving troughs in which the rod-shaped articles can be received or are received, the device further comprising an image capturing device with which the rod-shaped articles arranged in the receiving troughs can be detected or are captured during the transverse axial conveyance, the image capturing device having a camera arrangement comprises a plurality of cameras for image acquisition, and wherein the cameras are synchronized in particular for simultaneous image acquisition and these cameras are arranged next to one another in a direction of longitudinal extension of the receiving troughs each camera of the camera arrangement comprises an entocentric lens and uses this to image an object field, which the rod-shaped articles arranged in the receiving recesses pass through during the transverse axial conveyance, onto an image field, with the image field compris
  • the device according to aspects of the invention is based on the technical consideration that the conventional effort, especially the use of telecentric optics and the use of a large line camera with a high resolution, can be avoided by using a camera arrangement that has a plurality of individual cameras arranged side by side. The individual images captured by these individual cameras are offset against each other after capture.
  • the cameras are synchronized, i.e. the individual images of the cameras are captured at the same point in time.
  • a camera arrangement is less expensive than a correspondingly large line scan camera, since the individual cameras can be standard products that are available at a manageable price.
  • no special optics such as telecentric optics, but rather conventional entocentric optics can be used.
  • the fundamentally disadvantageous property of entocentric optics for the measurement task namely distortion, for example pincushion-shaped or barrel-shaped distortion, only plays a subordinate role in the camera arrangement according to aspects of the invention. It does not have a negative effect on the measurement. This is achieved by excluding those edge areas of the image area in which the distortion is high from the measurement task. In other words, only those imaging areas of the cameras are used for the measurement task which lie in a central area in which the entocentric optics also image almost without distortion.
  • the device according to aspects the invention does not take up much space.
  • the entocentric optics are not overly large and can be purchased in good quality at a reasonable price.
  • the object distance can be selected to be relatively small, for example less than 100 mm, 200 mm, 300 mm or less than 500 mm.
  • the camera arrangement is preferably arranged in such a way that the rod-shaped articles are imaged directly with the entocentric lenses of the individual cameras without further optical elements, such as for example one or more prisms or the like.
  • the cameras of the camera arrangements are those with a surface sensor (2D image sensor). In particular, no line scan cameras are used. In particular, the cameras of the camera device are synchronized. In other words, in particular, an image is captured simultaneously with all the cameras in the camera arrangement.
  • the camera arrangement comprises such a large number of individual cameras that it is possible, viewed as a whole, to image the rod-shaped article completely in the central areas of the cameras. After the captured image data have been combined to form a common image, a complete image of the rod-shaped article is available for subsequent analysis.
  • the device is developed in particular in that the processing unit is also set up to quantitatively measure at least one gap between two adjacent segments and/or at least one length of a segment of the rod-shaped article.
  • a qualitative evaluation can also be carried out. For example, it is possible to assess the quality of the cut edge of the individual segments. This is advantageously possible because with the camera arrangement of the device according to aspects of the invention a visual inspection is carried out under supervision, i.e. directly from above. The viewing direction is at least approximately perpendicular to a direction of longitudinal extent of the rod-shaped article. In comparison, if an optical test were to take place with a single entocentric lens, the end faces of the individual segments would be visible at least in the outer segments due to the viewing angle becoming flatter in the edge areas. Such a perspective makes a qualitative assessment of the cut edges difficult or imprecise.
  • the device is further developed in particular in that the image acquisition device and the processing unit are also set up to measure at least one distance between two adjacent segments oriented in the direction of longitudinal extent of the receiving troughs and/or a length of a segment oriented in this direction of longitudinal extent, in particular with an accuracy of better than 0.1 mm.
  • the resolution of the cameras of the camera arrangement is selected such that the resolution of the camera is large enough to achieve the desired resolution given the selected object distance and the optics used.
  • the object distance is 200 mm and a maximum object length is also 200 mm.
  • a resolution of the camera is between 8 and 10 thousand pixels, for example.
  • more than 4 cameras are used in the camera arrangement.
  • the camera arrangement comprises 4, 6, 8 or 10 cameras.
  • the device advantageously allows a very precise measurement the width of the individual gaps between the segments and a very precise measurement of the length of the segments of the rod-shaped article.
  • the device is further developed in particular in that the processing unit is also set up to calibrate the cameras of the camera arrangement by evaluating the image data of adjacent cameras recorded in the overlapping central image areas and determining a displacement vector between the image areas of adjacent cameras.
  • the displacement vector determined as part of the calibration is applied to the subsequent recordings in order to align them with one another, so that overall, i.e. in the joint image, there is an objectively and realistically correct representation of the rod-shaped article.
  • this calibration takes place especially for all cameras. It is also possible to repeat the calibration during the measurement operation, for example at regular intervals.
  • the cameras of the camera arrangement are sensitive in the visible spectral range.
  • the rod-shaped articles are illuminated in overhead light or in transmitted light.
  • a corresponding flash light is actuated simultaneously with a trigger of the individual cameras of the camera arrangement. The image acquisition therefore takes place at the moment when the rod-shaped article, which is received in the receiving trough, is illuminated by the flashlight.
  • the flash device is therefore synchronized with the cameras of the camera device.
  • the image acquisition takes place when the rod-shaped article, which is in the Receiving trough is included, is transported through the field of view of the camera assembly.
  • the conveying element is a conveying drum on which the rod-shaped articles are conveyed transversely and axially.
  • the object is also achieved by an arrangement in the tobacco processing industry, comprising a device according to one or more of the aforementioned embodiments, the arrangement also comprising a rolling device and the device for optically inspecting rod-shaped articles in relation to a conveying direction of the rod-shaped articles upstream the rolling device is arranged.
  • the rolling device comprises, for example, a conveyor drum on which the rod-shaped articles are conveyed transversely and with which the rod-shaped articles are fed to a roller block.
  • the device for optically inspecting the rod-shaped articles is arranged, for example, in such a way that the assembly of the segments is detected directly on the conveyor drum, just before the assembly is rolled into a sheet. In other words, the device for optical testing is therefore arranged immediately before the rolling process.
  • the arrangement is set up to perform process control and/or regulation on the basis of this parameter set. To this end, it is set up, for example, to make an association between a rod-shaped article and a set of parameters. If a rod-shaped article does not meet a predefined quality criterion due to a deviation in one or more parameters from a specified target value, the arrangement is also set up, for example, to eject this rod-shaped article after the rolling process and exclude it from further processing. It is further provided in particular that the parameter set or individual values/parameters are used to readjust and/or regulate the process of assembling the segments. If, for example, the gap between segments is found to be too small, this information can be used to readjust the composition in such a way that the desired target value is maintained in the subsequent compositions.
  • the set of parameters is used within the framework of quality control for the detection of error sources. For example, defective base materials can be identified.
  • the object is also achieved by a method for optically inspecting rod-shaped articles in the tobacco processing industry, in which the rod-shaped articles are each composed of a plurality of segments and are conveyed transversely by a conveying element in a receiving trough of the conveying element, the rod-shaped articles being conveyed during the transverse axial Promotion with a plurality of Cameras are recorded, these cameras being arranged next to one another in a longitudinal extension direction of the receiving trough, characterized in that the cameras are in particular synchronized and the rod-shaped articles are recorded in particular simultaneously and each camera captures an object field partially encompassing the rod-shaped articles entocentrically or at least approximately entocentrically Image field, the image field comprising a central imaging area in which a lens of the camera images without distortion or at least with a distortion below a specified or specifiable limit value, which is surrounded by an imaging edge area with greater distortion, and the rod-shaped article is imaged in this way is that the central imaging areas of adjacent cameras overlap one another, with the image
  • the image capture takes place with the aid of cameras which include a two-dimensional image sensor. Provision is also made in particular for the images of the rod-shaped articles to be recorded without another optical element being located in the beam path, such as for example one or more prisms or a mirror. In other words, the cameras capture the rod-shaped article directly through their entocentric lenses.
  • At least one intermediate space between two adjacent segments and/or at least one length of a segment of the rod-shaped article is/is quantitatively measured.
  • the method is also used to examine the rod-shaped articles or the segments qualitatively, for example with regard to the quality of the cut edges.
  • a width of one of the intermediate spaces oriented in the direction of longitudinal extension of the receiving trough and/or a length of a segment is/are measured, in particular with an accuracy of better than 0.1 mm.
  • the method advantageously allows a very precise measurement of the width of the gaps between the individual segments.
  • the method is further developed in particular in that the rod-shaped articles are transported on a conveyor drum during the transverse axial conveyance are recorded.
  • the object is also achieved by a method for controlling and/or regulating a rolling device in an arrangement in the tobacco processing industry.
  • the arrangement comprises a device for optically inspecting rod-shaped articles according to one or more of the aforementioned embodiments and a rolling device.
  • the assembly of segments is covered with a leaflet.
  • the rod-shaped articles of the tobacco processing industry are inspected according to a method for optically inspecting rod-shaped articles of the tobacco processing industry according to one or more of the aforementioned embodiments. This check takes place upstream of the rolling device, based on a conveying direction of the rod-shaped articles.
  • the rolling device comprises, for example, a conveyor drum on which the rod-shaped articles are conveyed transversely and with which the rod-shaped articles are fed to a roller block.
  • the inspection occurs while the assembly of segments is directly on the conveyor drum, just before the assembly is rolled into a sheet.
  • Process control and/or regulation is carried out, for example, on the basis of this parameter set. For example, an association between a rod-shaped article and a parameter set can be made. If a rod-shaped article does not meet a predefined quality criterion due to a deviation in one or more parameters from a specified target value, this rod-shaped article can be ejected after the rolling process and excluded from further processing. Provision is also made in particular for the parameter set or individual values/parameters to be used in order to readjust and/or regulate the process of assembling the segments. If, for example, the gap between segments is found to be too small, this information can be used to readjust the composition in such a way that the desired target value is maintained in the subsequent compositions. Furthermore, it is provided in particular that the set of parameters is used within the framework of quality control for the detection of error sources. For example, defective base materials can be identified.
  • Fig. 12 shows schematically and simplified a prior art optical setup for imaging a rod-shaped article 2 with an entocentric or near entocentric lens 4.
  • the entocentric lens 4 is represented by a single lens.
  • the rod-shaped article 2 is an assembly of several segments 6a, 6b, 6c, 6d and 6e.
  • the entocentric lens 4 captures the objects in the object space at an aperture angle ⁇ .
  • the outer light beams in this angular range fall obliquely into the entrance lens of objective 4 .
  • This means that the outer segments 6a, 6b and 6d and 6e, especially the two outer segments 6a and 6e, are not viewed directly from above, i.e. from a viewing direction perpendicular to a longitudinal axial direction L (shown in a dot-dash line).
  • the device includes a conveying element, which later in connection with 7 is explained in more detail. Furthermore, the device comprises an image capturing device with which the rod-shaped articles 2 can be captured or are captured during the transverse axial conveyance on the conveying member.
  • the image capturing device comprises a camera arrangement 14, as is shown schematically and in simplified form in 3 is shown.
  • the camera assembly 14 includes a plurality of cameras 16a, 16b, 16c, 16d and 16e. Each of the cameras 16a..16e is provided with an entocentric lens 4a..4e.
  • the image capturing device 18 also includes means, for example a suitable control or regulation, which ensures that the cameras 16a..16e of the Camera arrangement 14 are synchronized. In other words, the cameras 16a . . . 16e are triggered at the same time, ie they capture image data at the same time.
  • the image capturing device 18 is set up to capture rod-shaped articles 2, which are arranged in receiving troughs of a conveying element, for example a conveying drum, while they are being conveyed transversely.
  • the individual cameras 16a This longitudinal direction A is in 3 indicated with a dotted line (cf. also 7 ).
  • the lenses 4a..4e of the cameras 16a..16e of the camera arrangement 14 are entocentric optics or approximately entocentric optics.
  • the lenses are entocentric 4a..4e each represented by a single lens.
  • Each lens 4a..4e captures an object field and maps this onto the sensor of the associated camera 16a..16e.
  • the viewing angles of the cameras 16a..16e are shown with their respective opening angles ⁇ 1, ⁇ 2, ⁇ 3, ⁇ 4 and ⁇ 5.
  • the opening angles ⁇ 1.. ⁇ 5 are at least approximately the same size.
  • Light incident on the lenses 4a..4e from the opening angles ⁇ 1.. ⁇ 5 is imaged onto a central imaging area of the sensors of the cameras 16a..16e.
  • the opening angles ⁇ 1.. ⁇ 5 of the entocentric lenses 4a..4e of the camera arrangement 14 are all small compared to the opening angle ⁇ of in 1 shown entocentric lens 4 according to the prior art.
  • the opening angles ⁇ 1.. ⁇ 5 of the entocentric lenses 4a..4e overlap in the object space.
  • This overlapping area in object space shall be denoted by reference numeral 26'.
  • Light incident from the overlapping area 26′ is recorded by two cameras 16a .
  • the rod-shaped article 2 passes through the object field during the cross-axial conveyance and is recorded by the cameras 16a..16e.
  • FIG. 1 shows an example of an image field 20a of the first camera 16a, as it is imaged on a surface sensor, for example a CMOS sensor, of this camera by the associated lens 4a.
  • the image field 20b of the second camera 16b of the camera arrangement 14 is also shown.
  • Each of the image fields 20a, 20b includes a central imaging area 22a, 22b.
  • Light incident from the object space at the angle ⁇ 1 in the lens 4a of the first camera 16a is imaged in the central imaging area 22a.
  • the respective central imaging areas in the object space shall be denoted by the reference symbols 22a' to 22e'. In these areas, the associated lenses 4a, 4b image without distortion or almost without distortion.
  • At least the distortion of the associated lens 4a, 4b is below a predetermined limit value. This is given, for example, as a percentage of the ideal image.
  • This limit value is, for example, less than 1%, in particular less than 2%, moreover in particular less than 2.5% and moreover in particular less than 5%, moreover in particular the imaging error is less than 7.5%, moreover in particular less than 10% and more particularly less than 15%.
  • the central imaging area 22a, 22b is surrounded by an imaging edge area 24a, 24b, in which the distortion is greater than in the central imaging area 22a, 22b.
  • the distortion in the imaging edge area 24a, 24b is above one of the aforementioned limit values.
  • the cameras 16a..16e of the camera arrangement 14 are arranged such that the central imaging areas 22a, 22b of adjacent cameras 16a..16e overlap one another.
  • the overlapping area 26 is the interface between the adjacent central imaging areas 22a, 22b of adjacent cameras 16a..16e.
  • a processing unit in the image capturing device 18 which is set up to calibrate the cameras 16a..16e of the camera arrangement 14 by evaluating the image data of neighboring cameras 16a..16e captured in the overlapping central image areas 22a, 22b. For example, a cross-correlation between the image data of the images from neighboring cameras in the overlapping area 26 is calculated. Such a comparison allows a displacement vector 28 to be calculated, by which the image fields 20a, 20b of the adjacent cameras 16a, 16b are displaced relative to one another. in the in 4 illustrated embodiment, the displacement vector 28 is directed exclusively vertically. If the overlapping area 26 turns out to be wider than desired or narrower than desired, the displacement vector 28 would also include a corresponding horizontal component. A displacement vector 28 for all neighboring cameras 16a..16e of the camera arrangement 14 is calculated.
  • the processing unit is now set up to process the cameras 16a..16e of the camera arrangement 14 in the central imaging areas 22a, 22b to calculate a common image of the camera arrangement 14.
  • figure 5 shows the two image fields 20a, 20b corrected by the displacement vector 28, for example of the cameras 16a and 16, the image field 20b of the second camera 16b being shown with a dashed line for clarification.
  • the two central recording areas 22a, 22b are combined, with the image data of one or the other camera being able to be used in the overlapping area 26 as desired.
  • the individual image fields 20a to 20e as shown in 3 are shown schematically and in simplified form, gain a complete picture of the rod-shaped article 2. Deviating from the actual execution are in 3 the image fields 20a..20e, and this only for reasons of clarity, not shown overlapping.
  • an image of the rod-shaped article 2 can be provided, as shown in FIG. 6a by way of example and schematically simplified. This is already off directly below in FIG. 6b 2 known image of the rod-shaped article 2, as can be obtained with a single entocentric lens 4.
  • apparatus in accordance with aspects of the invention provides an image of the rod-shaped article 2 in which both the edges 12, only some of which are numbered for the sake of clarity only, are clearly visible.
  • the distances D1..D4 between the individual segments 6a..6e can be determined very precisely by knowing the imaging scale of the lenses 4a..4e from the distances D1'..D4' between the images 8a..8e of the corresponding segments 6a..6e are calculated.
  • the device is set up in such a way that gaps 30 (cf. 3 , only some of which are provided with reference symbols for reasons of clarity) between adjacent ones Segments 6a..6e of the rod-shaped article 2 can be measured quantitatively. The same applies to a length of the segments 6a..6e.
  • the image capturing device 18 is also set up in particular to measure the distances D1..D4 between the segments 6a..6e with an accuracy which is better than 0.1 mm.
  • a resolution of the lenses 4a..4e and a resolution of the sensors used in the cameras 16a..16e are selected such that the desired resolution is achieved.
  • the device 32 comprises a conveying drum 34 as a conveying element, which is shown in sections.
  • the conveying direction R corresponds to a direction of rotation of the conveying drum.
  • Above the receiving troughs 36 is the previously described image capturing device 18, of which only a few camera units, each comprising a camera and an entocentric lens, are shown schematically in an exemplary representation.
  • the receiving troughs 36 have a longitudinal extension direction A, which is already in connection with 3 was mentioned and in 7 is also indicated with a dotted line.
  • the direction of longitudinal extension A is oriented at least approximately perpendicular to the conveying direction R.
  • the individual cameras 16a It is thus possible to check the rod-shaped articles 2 optically during the cross-axial conveyance on the conveying element 34 .
  • the device 32 also includes a processing unit 38, for example a computer, a workstation or the like, which is set up, among other things, to control and read out the image capturing device 18, to carry out the aforementioned calibration and to calculate the joint image of the camera arrangement 14.
  • a processing unit 38 for example a computer, a workstation or the like, which is set up, among other things, to control and read out the image capturing device 18, to carry out the aforementioned calibration and to calculate the joint image of the camera arrangement 14.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Manufacturing Of Cigar And Cigarette Tobacco (AREA)

Claims (11)

  1. Dispositif (32) de l'industrie de transformation du tabac pour le contrôle optique d'articles (2) en forme de tige de l'industrie de transformation du tabac, les articles (2) en forme de tige étant chacun un assemblage de plusieurs segments (6a..6e). 6e), le dispositif (32) comprenant un organe de transport (34) pour le transport des articles (2) en forme de tige transversalement à leur axe, et l'organe de transport (34) comprenant une pluralité de cavités de réception (36) dans lesquelles les articles (2) en forme de tige sont aptes à être reçus ou sont reçus, le dispositif (32) comprenant en outre un dispositif (18) d'acquisition d'images avec lequel les articles (2) en forme de tige disposés dans les cavités de réception (36) sont aptes à être enregistrés ou sont enregistrés pendant le transport transversal à l'axe, le dispositif (18) d'acquisition d'images comprenant un agencement de caméras (14) avec une pluralité de caméras (16a.. 16e) pour l'acquisition d'images, et les caméras (16a.. 16e) étant synchronisées, en particulier pour l'acquisition simultanée d'images, et chaque caméra (16a.. 16e) de l'ensemble de caméras (14) comprenant un objectif entocentrique (4a.. 4e). 4e) et imageant avec celui-ci, sur un champ d'image (20a, 20b), un champ d'objet que les articles (2) en forme de tige disposés dans les cavités de réception (36) traversent pendant le transport transversal, le champ d'image (20a, 20b) comprenant une zone d'imagerie centrale (22a, 22b) dans laquelle l'objectif (4a.. 4e) produit une image sans distorsion ou au moins avec une distorsion inférieure à une valeur limite prédéfinie ou apte à être prédéfinie, qui est entourée d'une zone de bordure d'image (24a, 24b) ayant une distorsion plus importante, caractérisée en ce que ces caméras (16a.. 16e) sont agencées les unes à côté des autres dans une direction d'extension longitudinale (A) des cavités de réception (36) et les caméras (16a.. 16e) sont disposées dans l'ensemble de caméras (14) de telle sorte que les zones d'imagerie centrales (22a, 22b) de caméras adjacentes (16a.. 16e) se chevauchent, le dispositif (18) d'acquisition d'images comprenant en outre une unité de traitement (38) qui est conçue de façon à calculer les données d'image acquises par au moins deux caméras (16a.. 16e) de l'ensemble de caméras (14), en particulier par toutes les caméras, dans les zones d'imagerie centrales (22a, 22b) pour former une image commune de l'ensemble de caméras (14).
  2. Dispositif (32) de l'industrie du tabac selon la revendication 1, caractérisé en ce que l'unité de traitement (38) est en outre conçue de façon à mesurer quantitativement au moins un espace intermédiaire (30) entre deux segments (6a.. 6e) adjacents et/ou au moins une longueur d'un segment (6a.. 6e) des articles (2) en forme de tige.
  3. Dispositif (32) de l'industrie de transformation du tabac selon la revendication 2, caractérisé en ce que le dispositif (18) d'acquisition d'images et l'unité de traitement (38) sont en outre adaptés pour mesurer au moins une distance (D1.. D4) orientée dans la direction d'extension longitudinale (A) des cavités de réception (36) entre deux segments (6a.. 6e) adjacents et/ou une longueur d'un segment (6a.. 6e) orientée dans cette direction d'extension longitudinale (A), notamment avec une précision meilleure que 0,1 mm.
  4. Dispositif (32) de l'industrie de transformation du tabac selon l'une des revendications 1 à 3, caractérisé en ce que l'unité de traitement (38) est en outre conçue de façon à calibrer les caméras (16a.. 16e) de l'ensemble de caméras (14) en évaluant les données d'image de caméras adjacentes (16a.. 16b) acquises dans les zones d'image centrales (22a, 22b) qui se chevauchent et en déterminant un vecteur de décalage (28) entre les champs d'image (20a, 20b) de caméras adjacentes (16a.. 16e).
  5. Dispositif (32) de l'industrie de transformation du tabac selon l'une des revendications 1 à 4, caractérisé en ce que l'organe de transport (34) est un tambour de transport.
  6. Agencement de l'industrie de transformation du tabac, comprenant un dispositif selon l'une des revendications 1 à 5 et un dispositif de roulage, le dispositif de contrôle optique d'articles (2) en forme de tige étant disposé en amont du dispositif de roulage par rapport à une direction de transport des articles (2) en forme de tige.
  7. Procédé de contrôle optique d'articles (2) en forme de tige de l'industrie de transformation du tabac, les articles (2) en forme de tige étant respectivement un assemblage de plusieurs segments (6a.. 6e) et étant transportés par un organe de transport transversalement à leur axe dans une cavité de réception (36) de l'organe de transport, les articles (2) en forme de tige étant enregistrés pendant le transport transversal à l'axe par une pluralité de caméras (16a.. 16e), ces caméras (16a.. 16e) étant disposées les unes à côté des autres dans une direction d'extension longitudinale (A) de la cavité de réception (36), caractérisé en ce que les caméras (16a.. 16e) sont en particulier synchronisées et les articles (2) en forme de tige sont en particulier enregistrés simultanément et chaque caméra (16a.. 16e) crée une image entocentrique d'un champ d'objet englobant partiellement les articles en forme de tige (2) sur un champ d'image (20a, 20b), le champ d'image (20a, 20b) comprenant une zone d'imagerie centrale (22a, 22b) dans laquelle un objectif (4) de la caméra (16a.. 16e) produit une image sans distorsion ou au moins avec une distorsion inférieure à une valeur limite prédéfinie ou apte à être prédéfinie, qui est entourée d'une zone de bordure d'image (24a, 24b), ayant une distorsion plus importante, et l'article (2) en forme de tige étant représenté de telle sorte que les zones d'image centrales (22a, 22b) de caméras adjacentes (16a..16e) se chevauchent, les données d'image acquises par au moins deux caméras (16a.. 16e), en particulier par toutes les caméras, dans les zones d'imagerie centrales (22a, 22b) étant calculées pour former une image commune.
  8. Procédé selon la revendication 7, caractérisé en ce qu'au moins un espace intermédiaire (30) entre deux segments (6a.. 6e) adjacents et/ou au moins une longueur d'un segment (6a.. 6e) des articles (2) en forme de tige sont mesurés quantitativement ou aptes à l'être.
  9. Procédé selon la revendication 8, caractérisé en ce que l'on mesure une largeur d'un espace intermédiaire (30) orientée dans la direction d'extension longitudinale (A) de la cavité de réception (36) et/ou une longueur d'un segment (6a.. 6e) orientée dans la direction d'extension longitudinale (A), notamment avec une précision meilleure que 0,1 mm.
  10. Procédé selon l'une des revendications 7 à 9, caractérisé en ce que les caméras (16a.. 16e) sont calibrées en évaluant les données d'image de caméras adjacentes (16a.. 16e) acquises dans les zones d'imagerie centrales (22a, 22b) qui se chevauchent et en déterminant un vecteur de déplacement (28) entre les zones d'image (22a, 22b) de caméras adjacentes (16).
  11. Procédé selon l'une des revendications 7 à 10, caractérisé en ce que les articles (2) en forme de tige sont enregistrés pendant le transport transversal à l'axe sur un tambour de transport.
EP19150463.8A 2018-01-11 2019-01-07 Dispositif et procédé de vérification des articles en forme de boudin de l'industrie de traitement du tabac Active EP3510877B1 (fr)

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KR20190085867A (ko) 2019-07-19
EP3510877A3 (fr) 2019-09-25
EP3510877A2 (fr) 2019-07-17
CN110025039A (zh) 2019-07-19
DE102018100500A1 (de) 2019-07-11
PL3510877T3 (pl) 2023-04-24
CN110025039B (zh) 2022-11-01

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