EP3914101B1 - Contrôle de qualité de produits en forme de tige de l'industrie de transformation du tabac - Google Patents

Contrôle de qualité de produits en forme de tige de l'industrie de transformation du tabac

Info

Publication number
EP3914101B1
EP3914101B1 EP19702050.6A EP19702050A EP3914101B1 EP 3914101 B1 EP3914101 B1 EP 3914101B1 EP 19702050 A EP19702050 A EP 19702050A EP 3914101 B1 EP3914101 B1 EP 3914101B1
Authority
EP
European Patent Office
Prior art keywords
rod
shaped
receiving
shaped product
products
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19702050.6A
Other languages
German (de)
English (en)
Other versions
EP3914101A1 (fr
Inventor
Denis Baron
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
Original Assignee
Koerber Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koerber Technologies GmbH filed Critical Koerber Technologies GmbH
Publication of EP3914101A1 publication Critical patent/EP3914101A1/fr
Application granted granted Critical
Publication of EP3914101B1 publication Critical patent/EP3914101B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Definitions

  • the invention relates to a method for measuring at least one quality parameter of rod-shaped products from the tobacco processing industry, in particular heat-not-burn products, wherein the rod-shaped products are conveyed transversely to their longitudinal axis.
  • the invention further relates to a measuring device for the tobacco processing industry, comprising a conveying device for conveying rod-shaped products from the tobacco processing industry, in particular heat-not-burn products, wherein the conveying device has receiving troughs for receiving the rod-shaped products, wherein the conveying device is designed to convey the rod-shaped products in a direction transverse to the longitudinal axis of the receiving troughs.
  • rod-shaped products produced such as filter cigarettes or filter rods or multi-segment filter rods as well as heat-not-burn products with regard to their quality in order to exclude rod-shaped products that do not meet the quality requirements from the further production process.
  • WO 2015/138440 A1 or DE 10 2014 213 244 A1 Both patent applications show measuring devices by means of which rod-shaped products of the tobacco processing industry can be examined with regard to their properties.
  • DE 10 2014 209 721 A1 shows a method for determining a property of a rod-shaped article in the tobacco processing industry.
  • the rod-shaped article is placed on a rotating sample holder and irradiated with X-rays.
  • a quality parameter is understood to mean a diameter, roundness, the position of segments, the shape of segments, the inner diameter of a tube, the presence and/or location of additional elements, such as liquid-filled capsules, the length of the rod-shaped product, and similar parameters.
  • products for which conventional measurement methods fail because materials are used that are not suitable for conventional measurement methods.
  • heat-not-burn products have an aluminum foil wrapped around the rod-shaped products or are provided as the outermost layer or one of the outer layers of such rod-shaped products. It is not possible to produce a transmission image in the optical or infrared range with these products.
  • the use of X-rays per se is also hardly suitable for such products. suitable because, even when X-rays are used, sufficient contrast in the transmission images cannot be expected during the rapid conveyance of such products in machines in the tobacco processing industry.
  • the object of the present invention is to enable a reliable and highly accurate measurement of quality parameters even in rod-shaped products of the tobacco processing industry which have components that make conventional transmission measurement difficult.
  • This object is achieved by a method for measuring at least one quality parameter, in particular the length of one or more segments or a type of at least one segment, of rod-shaped products of the tobacco processing industry, in particular heat-not-burn products, wherein the rod-shaped products are conveyed transversely to their longitudinal axis and during conveyance X-rays pass through the rod-shaped products, wherein the transmitted X-rays are recorded by means of an area detector and a transmission image of the respective rod-shaped product is generated by means of a time delay integration.
  • the method according to the invention and the resulting longer exposure time result in significantly higher contrast and thus higher image quality.
  • the evaluation of the transmission image, particularly by means of digital image processing, is thus simplified and has greater accuracy.
  • the time delay integration is or is synchronized with the conveying speed of the rod-shaped products.
  • a speed signal is preferably provided to a control device that controls the recording of the transmission image by the area detector, so that the time delay integration is preferably synchronized depending on the conveying speed of the rod-shaped products.
  • the transmission image of the respective rod-shaped product is integrated synchronously with the conveying movement of the rod-shaped product. This enables very precise transmission images and also significantly increases the contrast.
  • the rod-shaped products are completely arranged in a receiving trough of a conveyor device during the measurement.
  • the rod-shaped products are placed in the Suction cup to fix the rod-shaped products in place in the receiving cup.
  • the receiving recess is radiation-permeable to the X-rays.
  • radiation-permeable means an absorption of less than 50%, particularly preferably less than 40%, particularly preferably less than 30%, particularly preferably less than 20%, particularly preferably less than 10%. It can also preferably be provided that at least a portion of the receiving recess provides no absorption of the X-rays, for example, if a recess or a slot is provided in the receiving recess through which the X-rays can pass, specifically directly into the rod-shaped product.
  • the conveying device has at least one section, transverse to the longitudinal axis of the rod-shaped products or the receiving trough, adjacent to the receiving trough, that is substantially opaque or completely opaque to X-rays.
  • a material is preferably used that has a high absorption coefficient for the X-rays used, and/or a sufficient thickness of the material is provided.
  • a transmission image of the rod-shaped product is formed by successively considering different lines or line groups of the area detector for the integration of the signal as the X-rays passing through the rod-shaped product pass over the area detector, synchronized with the speed of the conveyance of the rod-shaped products in the conveying direction.
  • the image is very precise throughout the entire time the image of the rod-shaped product falls on the area detector.
  • the area detector In the event that interfering radiation from neighboring areas of the receiving cavity or the respective rod-shaped product also falls on the area detector, preferably only one area should contribute to the integration, which represents the transmission image of the rod-shaped product at a given time.
  • the background radiation can be eliminated by measuring the intensity outside the area in which the image of the rod-shaped product falls on the area detector and subtracting it. This can be achieved with appropriate control and image processing.
  • time-delay integration can be performed in such a way that the exact location of the image of the rod-shaped product on the area detector is determined at any given time, for example, by detecting the contour of the image. Only those pixels within the image can then be considered for integration.
  • a pixel matrix is assigned to the image, so to speak, with the respective pixels moving relative to the location of the image as the image moves.
  • the rod-shaped product is measured over its entire length.
  • the rod-shaped product is measured over its entire diameter.
  • image processing can take into account the fact that the edge areas of the recording wells may contribute somewhat more to X-ray absorption, since there is slightly more material there in the direction of the X-ray beam. This can be taken into account during image processing.
  • a suitable area detector can be a CCD image sensor, For example, a CCD 5061 from BAE Systems Imaging Solutions can be selected. This is a CCD sensor with 6,144 pixels by 128 lines. This can be read at 80 MHz with a line rate of up to 12 kHz.
  • CCDs instead of a CCD as an area detector, line CCDs arranged in an array or an array of line detectors can also be used.
  • sampling frequency for example, 10 KHz
  • sampling between 50 ⁇ m and 500 ⁇ m can be achieved depending on the size of the pixels and the size of the rod-shaped products to be measured and the conveying speed.
  • a measuring device of the tobacco processing industry comprising a conveyor device for conveying rod-shaped products of the tobacco processing industry, in particular heat-not-burn products, wherein the conveyor device has receiving troughs for receiving the rod-shaped products, wherein the conveyor device is designed to convey the rod-shaped products in a direction that is transverse to the longitudinal axis of the receiving troughs, wherein an X-ray source is provided and an area detector is provided that is arranged such that the area detector detects the X-ray radiation passing through a receiving trough and a rod-shaped product received in the receiving trough, wherein a control device is provided that is designed to generate a transmission image of the rod-shaped product by means of time-delay integration when the rod-shaped product is conveyed.
  • the area detector has an extension in the conveying direction that is greater than the diameter of the rod-shaped product or greater than the diameter of the receiving trough.
  • the rows of pixels or lines of the area detector are perpendicular to the conveying direction or parallel to the longitudinal axes of the receiving troughs.
  • the extension of the area detector in the conveying direction is preferably between two and five times the diameter of the rod-shaped product or the diameter of the receiving trough.
  • the complete rod-shaped product can preferably be measured if the extension of the area detector transverse to the conveying direction corresponds at least to the length of the rod-shaped product or the length of the receiving trough.
  • the receiving troughs are at least partially X-ray transparent in an area intended for receiving the rod-shaped products.
  • the entire receiving trough is X-ray transparent.
  • X-ray-permeable means that the thickness of the material and/or the material selection is such that less than 50%, in particular less than 40%, in particular less than 30%, in particular less than 20%, in particular less than 10% of the X-ray radiation is absorbed by the material upon passing through the receiving recess.
  • the receiving recess is provided with a slot in sections so that no X-ray absorption occurs there at all. The receiving recess is thus free of material in the region of the slot.
  • the material thickness of the receiving trough is at least partially less than or equal to 1 mm.
  • the material of the receiving trough is at least partially made of aluminum or comprises aluminum.
  • the front side of the receiving trough A ring-shaped frame is provided to stabilize the receiving troughs.
  • the use of X-rays is proposed for measuring quality parameters of rod-shaped products in the tobacco processing industry, especially heat-not-burn products. Since heat-not-burn products are often completely wrapped in aluminum foil, conventional sensor methods cannot be applied or can only be applied to a limited extent.
  • the quality parameters measured include, among others, the position of segments, the length of segments, the spacing between segments, and the material of the segments.
  • the products to be inspected are guided through an X-ray beam on a cross-axial conveyor device, such as a conveyor drum, a cantilever spider, or a conveyor belt.
  • a cross-axial conveyor device such as a conveyor drum, a cantilever spider, or a conveyor belt.
  • Line detectors with so-called time-delay integration (TDI) technology are particularly suitable for dynamic processes.
  • the image is integrated, particularly analogically, synchronously with the linear object movement within the TDI sensor or area detector in the scanning direction.
  • the resulting longer exposure time results in significantly higher image quality.
  • evaluations are simplified and more accurate using digital image processing.
  • Thin-walled conveyor elements which only slightly attenuate the X-ray signal, are particularly preferred for the measuring method and device.
  • the invention makes it possible to precisely determine, even in complex products from the tobacco processing industry, whether the segments used are in the correct position, whether the correct segments are inserted, or even whether segments are missing, and whether these segments are the correct length. Furthermore, statements can be made about the correct positioning of inserted materials, such as threads, capsules, strips, and the like.
  • the X-rays are preferably generated using a standard X-ray tube with a suitable focus.
  • the tube voltage of a commonly used X-ray tube should be between 5 keV and 450 keV.
  • the X-ray beam is preferably collimated to the area to be examined or the X-ray beam is appropriately shaded to avoid or reduce parasitic scattering effects and thus artifacts in the imaging.
  • the transmitted radiation is directed to a receiver.
  • the receiver is preferably an area detector, preferably with a scintillation layer and can preferably be a CMOS or CCD.
  • a line detector or area detector with TDI technology is preferably used.
  • the image is integrated analogously synchronously with the linear object movement within the TDI sensor in the scanning direction. The resulting longer exposure time enables significantly higher image quality.
  • the resulting high-resolution images can be very easily evaluated using digital image processing algorithms.
  • solid rings are provided on the front end, enclosing the walls of the receiving troughs.
  • the control flange must be adjusted so that no material is in the beam path between the X-ray tube and the area detector.
  • the walls of the receiving troughs can also be made of other materials such as plastic, composite materials, or other materials with low X-ray absorption.
  • a conveyor belt can also be provided, which is conveyed via appropriate conveyor belt drums.
  • Fig. 1 shows a schematic sectional view of part of a measuring device according to the invention.
  • Receiving troughs 15 are provided on a conveyor drum 16, in which rod-shaped products 10 are held.
  • the conveyor drum 16 is rotated or moved in the conveying direction 14.
  • X-ray radiation 12 is generated by an X-ray source 20 and sent toward the area detector 13.
  • the transmission image of the rod-shaped product is recorded by the area detector 13.
  • the transmission image is moved during the movement of the rod-shaped product 10 in the conveying direction 14.
  • Fig. 1 The transmission image moves from right to left on the area detector 13.
  • the transmission image is integrated accordingly, so that a very high-contrast transmission image is generated by means of a time-delay integration.
  • the areas between the receiving recesses 15 have a relatively thick wall, so that relatively little X-ray radiation passes through them.
  • the material here can be, for example, stainless steel.
  • the receiving recess 15 can be made of aluminum, at least in part, or entirely of aluminum and relatively thin-walled, allowing X-rays to pass through it easily, thus enabling the best possible image of the material of the rod-shaped product 10.
  • Fig. 2 shows a schematic sectional view of a section of a conveyor drum 16 in another embodiment.
  • the receiving trough 15 has a portion made of a material and an otherwise material-free area 18 or a slot 18 to prevent any absorption of X-rays in this area by additional material that is not part of the rod-shaped product.
  • FIG. 3 schematically shows another embodiment of a measuring device according to the invention.
  • a conveyor belt 17 is deflected over two drums 25.
  • the conveyor belt 17 is conveyed in the conveying direction 14.
  • Receiving troughs 15, into which rod-shaped products 10 are inserted, are mounted on the conveyor belt 17. For clarity, only some of the receiving troughs 15 and the rod-shaped products 10 are shown.
  • an X-ray source 20 is provided, which emits X-ray radiation 12 in the direction of the area detector 13.
  • a precise image of the respective rod-shaped products 10 is enabled by time-delay integration.
  • a control device 21 is provided both in the embodiment according to Fig. 1 as well as in the embodiment according to Fig. 3 which controls the recording or reading of the area detector 13 via a control line 24.
  • the control device 21 receives a speed signal from the machine control and processes this signal in such a way that, based on the geometric conditions, the speed signal is converted into a signal which represents a speed of the image of the rod-shaped product 10 on the area detector 13 in order to enable a synchronized integration of the signal.
  • Fig. 4 shows, in a further embodiment, a section of a conveyor drum 16.
  • Three receiving troughs 15 are shown, wherein rod-shaped products 10 are introduced into two receiving troughs and one receiving trough has been left open in order to illustrate properties of this receiving trough 15.
  • the receiving trough 15 is essentially thin-walled and has a slot 18 in the central region, i.e. an area in which no material is arranged.
  • a border 23 is provided which is also connected to the material provided between the receiving troughs 15 of the conveyor drum 16.
  • the rod-shaped products indicate several segments. Typically, however, an aluminum foil, for example, is wrapped around these segments, so that the various segments themselves would not be visible in a plan view.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Claims (16)

  1. Procédé pour mesurer au moins un paramètre de qualité, en particulier la longueur, d'un ou plusieurs segments ou d'un type d'au moins un segment, de produits en forme de bâtonnets (10) de l'industrie de transformation du tabac, en particulier de produits Heat-not-burn (à chauffage sans combustion), dans lequel les produits en forme de bâtonnets (10) sont transportés transversalement à leur axe longitudinal (11) et sont traversés par un rayonnement X (12) pendant le transport, le rayonnement X transmis (12) étant enregistré au moyen d'un détecteur de surface (13) et une image de transmission du produit en forme de bâtonnet (10) correspondant étant générée au moyen d'une intégration temporelle.
  2. Procédé selon la revendication 1, caractérisé en ce que l'intégration temporelle est synchronisée avec la vitesse de transport des produits en forme de bâtonnet (10), l'image de transmission du produit en forme de bâtonnet (10) correspondant étant en particulier intégrée de manière synchrone avec le mouvement de transport du produit en forme de bâtonnet (10).
  3. Procédé selon la revendication 1 ou la revendication 2, caractérisé en ce que chacun des produits en forme de bâtonnet (10) est entièrement agencé dans un auget de réception (15) d'un dispositif de transport (16, 17) pendant la mesure.
  4. Procédé selon la revendication 3, caractérisé en ce qu'au moins une partie de l'auget de réception (15) est transparent aux rayons X (12).
  5. Procédé selon la revendication 3 ou la revendication 4, caractérisé en ce que le dispositif de transport (16, 17) comprend, transversalement à l'axe longitudinal (11) des produits en forme de bâtonnet (10) ou de l'auget de réception (15), à côté de l'auget de réception (15), au moins une partie qui est essentiellement imperméable aux rayons X ou qui est complètement imperméable.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le produit en forme de bâtonnet (10) est mesuré sur toute la longueur du produit en forme de bâtonnet (10).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que le produit en forme de bâtonnet (10) est mesuré surtout le diamètre du produit en forme de bâtonnet (10).
  8. Dispositif de mesure pour l'industrie de transformation du tabac, comprenant un dispositif de transport (16, 17) pour transporter des produits en forme de bâtonnets (10) de l'industrie de transformation du tabac, en particulier des produits Heat-not-burn (à chauffage sans combustion), le dispositif de transport (16, 17) comprenant des augets de réception (15) destinés à recevoir les produits en forme de bâtonnets (10), le dispositif de transport (16, 17) étant conçu pour transporter les produits en forme de bâtonnets (10) dans une direction transversale à l'axe longitudinal (11) des augets de réception (15), une source de rayons X (20) et un détecteur de surface (13) étant prévus, qui sont agencés de telle sorte que le détecteur de surface (13) détecte un rayonnement X (12) passant à travers un auget de réception (15) et un produit en forme de bâtonnet (10) reçu dans l'auget de réception (15), un dispositif de commande (21) étant prévu, qui est agencé de manière à générer, au moyen d'une intégration temporelle, une image de transmission du produit en forme de bâtonnet (10) lors du transport du produit en forme de bâtonnet (10).
  9. Dispositif de mesure selon la revendication 8, caractérisé en ce que le détecteur de surface (13) présente, dans la direction de transport (14) une extension supérieure au diamètre du produit en forme de bâtonnet (10) ou plus grandes que le diamètre de l'auget de réception (15).
  10. Dispositif de mesure selon la revendication 9, caractérisé en ce que l'extension du détecteur de surface (13) dans la direction de transport (14) est comprise entre deux et cinq fois le diamètre du produit en forme de bâtonnet (10) ou le diamètre de l'auget de réception (15).
  11. Dispositif de mesure selon l'une des revendications 8 à 10, caractérisé en ce que l'extension du détecteur de surface (13) transversalement à la direction de transport (14) correspond au moins à la longueur du produit en forme de bâtonnet (10).
  12. Dispositif de mesure selon l'une des revendications 8 à 11, caractérisé en ce que les augets de réception (15) sont au moins partiellement perméables aux rayons X dans une zone prévue pour recevoir les produits en forme de bâtonnets (10).
  13. Dispositif de mesure selon la revendication 12, caractérisé en ce que les augets de réception (15) sont au moins partiellement pourvus d'une fente (18).
  14. Dispositif de mesure selon l'une des revendications 8 à 13, caractérisé en ce que l'épaisseur du matériau de l'auget de réception (15) est au moins partiellement inférieure ou égale à 1mm.
  15. Dispositif de mesure selon l'une des revendications 8 à 14, caractérisé en ce que le matériau de l'auget de réception (15) est au moins partiellement en aluminium.
  16. Dispositif de mesure selon la revendication 14 ou la revendication 15, caractérisé en ce qu'une bordure annulaire (23) est prévue sur le côté frontal (22) de l'auget de réception (15) pour stabiliser l'auget de réception (15).
EP19702050.6A 2019-01-24 2019-01-24 Contrôle de qualité de produits en forme de tige de l'industrie de transformation du tabac Active EP3914101B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2019/051717 WO2020151823A1 (fr) 2019-01-24 2019-01-24 Contrôle de qualité de produits en forme de tige de l'industrie de transformation du tabac

Publications (2)

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EP3914101A1 EP3914101A1 (fr) 2021-12-01
EP3914101B1 true EP3914101B1 (fr) 2025-10-15

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EP (1) EP3914101B1 (fr)
CN (1) CN113316397B (fr)
WO (1) WO2020151823A1 (fr)

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CN113393460B (zh) * 2021-08-16 2021-11-30 湖南磐钴传动科技有限公司 基于图像处理的烟丝质量参数检测方法及系统

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GB745153A (en) * 1953-04-07 1956-02-22 Ind Machinery Co Ltd Improvements relating to radiation gauges such as beta gauges
JP2000094425A (ja) * 1998-09-17 2000-04-04 Noritake Co Ltd 押出成形機に装着される素材定寸切断装置
JP4723752B2 (ja) * 2001-05-01 2011-07-13 株式会社イシダ Ｘ線検査装置
JP4094910B2 (ja) * 2002-08-23 2008-06-04 川崎重工業株式会社 Ｘ線画像撮像装置
GB0802478D0 (en) 2008-02-11 2008-03-19 Cmosis Nv Tiem delay integration in imaging device
DE102011006449A1 (de) * 2011-03-30 2012-10-04 Hauni Maschinenbau Ag Verfahren und Vorrichtung zum Messen einer physikalischen Eigenschaft eines längsaxial geförderten stabförmigen Artikels der Tabak verarbeitenden Industrie
DE102012102338A1 (de) * 2012-03-20 2013-09-26 Hauni Maschinenbau Ag Messanordnung zum Messen von in Strangmaschinen der Tabak verarbeitenden Industrie hergestellten und geförderten Strängen
US9844232B2 (en) 2014-03-11 2017-12-19 R.J. Reynolds Tobacco Company Smoking article inspection system and associated method
DE102014209721A1 (de) * 2014-05-22 2015-11-26 Hauni Maschinenbau Ag Verfahren zur Bestimmung einer Eigenschaft eines stabförmigen Artikels der Tabak verarbeitenden Industrie mittels Röntgenstrahlung, und Probenhalter
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JP6397690B2 (ja) * 2014-08-11 2018-09-26 株式会社日立ハイテクノロジーズ Ｘ線透過検査装置及び異物検出方法
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CN113316397A (zh) 2021-08-27
CN113316397B (zh) 2023-06-20
EP3914101A1 (fr) 2021-12-01

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