EP0876599A1 - Procede d'enregistrement de donnees pour identifier des corps etrangers - Google Patents

Procede d'enregistrement de donnees pour identifier des corps etrangers

Info

Publication number
EP0876599A1
EP0876599A1 EP96934708A EP96934708A EP0876599A1 EP 0876599 A1 EP0876599 A1 EP 0876599A1 EP 96934708 A EP96934708 A EP 96934708A EP 96934708 A EP96934708 A EP 96934708A EP 0876599 A1 EP0876599 A1 EP 0876599A1
Authority
EP
European Patent Office
Prior art keywords
cotton
lighting
stream
flake stream
illuminated
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.)
Withdrawn
Application number
EP96934708A
Other languages
German (de)
English (en)
Inventor
Michael Cieslinski
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.)
CIS Graphik und Bildverarbeitung GmbH
Original Assignee
CIS Graphik und Bildverarbeitung 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 CIS Graphik und Bildverarbeitung GmbH filed Critical CIS Graphik und Bildverarbeitung GmbH
Publication of EP0876599A1 publication Critical patent/EP0876599A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
    • B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
    • B07C5/34—Sorting according to other particular properties
    • B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
    • D01G31/003—Detection and removal of impurities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/188—Capturing isolated or intermittent images triggered by the occurrence of a predetermined event, e.g. an object reaching a predetermined position

Definitions

  • the invention relates to a data acquisition method for recognizing foreign parts.
  • an image is or are made of an object by means of a camera or a corresponding image recording device or three images, namely images in the colors red, green and blue, are generated by means of a color image (RGB) camera taken with the same lighting.
  • RGB color image
  • Hergeth GmbH markets a system under the name "Optiscan", in which the cotton fibers are transported through a condenser to a cleaning system.
  • the cotton fibers were previously opened by a box feeder or mixer, so that large clumps of fibers, such as may come from a milling machine, are already open.
  • the fibers are transported to a narrow observation zone by means of a conveyor belt with a specially designed rough surface and at the same time aligned.
  • the fibers are observed using optical elements in the form of sensors with glass fiber optics. respect.
  • the individual glass fibers are combined to form a glass fiber bundle, which ends at a pane on which a camera is directed.
  • the recorded optical signals are then transmitted to an evaluation unit.
  • the individual fibers are checked by color sensors that work with the three primary colors.
  • the known system Since only colored parts can be recognized with the sensors, the known system is fundamentally not suitable at all for recognizing white parts, since these have the same color as cotton, and is also not suitable for adding transparent plastic or film parts detect. In this known system, the detection reliability compared to cotton is therefore not particularly high. Because of the glass fiber optics used, there is also no closed image that can be evaluated, but only individual color channels are recorded with the camera.
  • the air flow must be separated from the cotton fiber flow, since only in this way can the cotton fibers be conveyed past the detection zone and thus past the sensors provided there. Due to the separation of the air flow from the cotton flake flow, the latter can only be conveyed at a relatively low speed.
  • the line decelerated by means of a line camera in particular a color line camera Cotton flake monitored.
  • the stream of cotton flakes is continuously illuminated from all sides and is transported past the line camera against a bright background.
  • a major disadvantage of this method is that no white or transparent parts can be recognized.
  • the object of the invention is therefore to specify a method with which foreign parts, in particular in the form of white and / or transparent plastic or plastic parts, can be reliably detected in a stream of cotton flakes with high reliability.
  • the data recording method according to the invention for recognizing foreign parts several images are taken of a cotton flake stream with one and the same recording device, preferably with a CCD area camera, which are illuminated in different ways.
  • the images of the cotton flake stream, which is illuminated in different ways, are then electronically combined in order to increase the recognition reliability so that they are brought into register with one another.
  • a stream of cotton flakes to be recorded can take place, for example, from different sides or also from different directions.
  • a stream of cotton flakes to be monitored with transmitted light and incident light are illuminated. It is also possible to illuminate the cotton flake stream to be recorded with light in various colors or with light in the ultraviolet or infrared range.
  • the types of lighting described above or parts of a respective type of lighting can then also be linked or combined with one another.
  • a stream of cotton flakes can be illuminated from one side with incident light of a certain color and then, for example, with transmitted light.
  • a combination is also possible in which a cotton flake stream is illuminated with transmitted light and, for example, two or three times with incident light, or vice versa. Or there is illumination from one side with light of a certain color and illumination from another direction with light of a color different from the first color.
  • a large number of light-emitting diodes are provided, for example, in order to achieve homogeneous transmitted light and incident light illumination.
  • the phosphor diodes are briefly actuated one after the other.
  • the characteristic feature of the data recording method according to the invention is therefore that several pictures with different ones Illuminations are recorded with the same camera in quick succession.
  • the thickness of the cotton flakes can be concluded at this point, since the transmitted light illumination is darkened more and more with increasing thickness of the flakes.
  • a certain flock density a certain brightness in the incident light to be expected.
  • the various illuminations are advantageously realized as flash illuminations, and the various images are recorded with a suitable camera so quickly that the known images moved objects only moved a few millimeters during the image acquisition.
  • two identically constructed recording and exposure modules are along of the cotton flake stream, which is guided in a channel with a preferably rectangular cross section, is arranged in such a way that it is counter to one another by a certain angle, preferably by 180 °. others are twisted; the two modules arranged rotated relative to one another are preferably provided directly next to one another.
  • Each of the two modules each has a recording device, preferably in the form of two CCD area cameras and exposure devices assigned to this or these for illuminating the stream of cotton flakes from different sides and from different directions.
  • the cotton flake stream is viewed from different sides, with an arrangement rotated relative to one another by 180 °, from two diametrically opposite sides. Because of this arrangement of the two receiving devices, a cotton flake is also recognized which has some kind of error.
  • the drawing schematically shows in section a Z-shaped channel 1, preferably rectangular in cross section, in which a cotton flock stream 2 is indicated is carried in the direction indicated by arrows.
  • a Z-shaped channel 1 preferably rectangular in cross section, in which a cotton flock stream 2 is indicated is carried in the direction indicated by arrows.
  • the cameras 30 and 30 'in the two modules 3 and 3' are each preferably CCD area cameras. Furthermore, a plurality of lighting devices 32 and 32 'for incident light are arranged in the two modules 3 and 3', which illuminate the flock current uniformly. On the side of each module 3 and 3 'opposite the incident light illumination devices 32 and 32', illumination devices 31 and 31 'are provided for transmitted light.
  • the light cones emanating from the various lighting devices 31, 31 'and 32, 32' are indicated by thin dashed lines.
  • a glass pane 10 indicated by dashed lines, is provided on both sides of the channel.
  • a flap 4 is provided in the lower horizontal arm of the Z-shaped conveying channel 1, under which a collecting container 5 is provided. As soon as one or both of the receptacles and lighting modules 2 and 3 detect a foreign part, for example in the form of a plastic or film part, the flap 4 is brought into the vertical position shown in dashed lines by a control unit (not shown in the drawing).
  • the switching time of the flap is of the order of 50 ms and the processing of the recorded images is also of the order of 50 to 60 ms.
  • the flap 4 and thus the collecting container 5 are arranged at a distance of approximately 2 m from the receiving and lighting module 3 '.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

Afin d'identifier des corps étrangers dans un flux de flocons de coton, plusieurs prises de vue sont effectuées avec un seul appareil approprié, avec différents éclairages tels que lumière transmise et/ou lumière incidente, de différents côtés et/ou à partir de différentes directions. Les prises de vue réalisées sont combinées pour rendre le processus d'identification encore plus fiable. Afin de réaliser des prises de vue de corps étrangers, il est prévu au moins un module muni d'un dispositif de prise de vues et de dispositifs d'éclairage associés audit dispositif et servant à éclairer le flux de flocons de coton passant par un canal de préférence de section rectangulaire. Il est en outre prévu une unité d'évaluation électronique montée en aval du module de prise de vues et d'éclairage.
EP96934708A 1995-10-16 1996-10-16 Procede d'enregistrement de donnees pour identifier des corps etrangers Withdrawn EP0876599A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19538481 1995-10-16
DE19538481 1995-10-16
PCT/EP1996/004496 WO1997014955A1 (fr) 1995-10-16 1996-10-16 Procede d'enregistrement de donnees pour identifier des corps etrangers

Publications (1)

Publication Number Publication Date
EP0876599A1 true EP0876599A1 (fr) 1998-11-11

Family

ID=7774981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96934708A Withdrawn EP0876599A1 (fr) 1995-10-16 1996-10-16 Procede d'enregistrement de donnees pour identifier des corps etrangers

Country Status (3)

Country Link
EP (1) EP0876599A1 (fr)
DE (1) DE19642736C2 (fr)
WO (1) WO1997014955A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004015463B4 (de) * 2004-03-26 2006-07-06 Hauni Primary Gmbh Verfahren und Vorrichtung zur Fremdkörperabscheidung
DE102004020776B4 (de) * 2004-04-27 2007-03-08 Hauni Primary Gmbh Verfahren und Einrichtung zur Fremdkörperabscheidung aus einem Materialstrom
EP2942114B1 (fr) * 2014-05-09 2019-02-27 Baumer Inspection GmbH Procédé de reconnaissance de corps étrangers
DE102017121359A1 (de) * 2017-09-14 2019-03-14 TRüTZSCHLER GMBH & CO. KG Vorrichtung zum Erkennen und Ausscheiden von Fremdteilen in oder zwischen Fasermaterial

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146135A (en) * 1977-10-11 1979-03-27 Fmc Corporation Spot defect detection apparatus and method
DE3545960C1 (de) * 1985-12-23 1987-07-09 Messerschmitt Boelkow Blohm Verfahren und Anordnung zur Erkennung von Teilen
DE3644535A1 (de) * 1986-12-24 1988-07-14 Truetzschler & Co Verfahren und vorrichtung zum erkennen von fremdkoerpern wie fremdfasern, bindfaeden, kunststoffbaendchen, draehten o. dgl. innerhalb von bzw. zwischen textilfaserflocken
EP0364786B1 (fr) * 1988-10-11 1994-03-16 Maschinenfabrik Rieter Ag Identification de matière étrangère dans les fibres textiles
JPH0382828A (ja) * 1989-08-28 1991-04-08 Tatsumi Eyaa Eng:Kk 原綿中の異物の検出装置
EP0604875B1 (fr) * 1992-12-31 1999-04-21 Zellweger Uster, Inc. Monitorage continu bidimensionnel de tissu textile mince
DE4340165A1 (de) * 1993-11-25 1995-06-01 Hergeth Hubert A Verfahren zum schnellen Erkennen und Ausschleusen von andersfarbigen Fremdteilen in Faserverarbeitungslinien
JPH07155702A (ja) * 1993-12-01 1995-06-20 Satake Eng Co Ltd 穀粒色彩選別装置
WO1995021375A1 (fr) * 1994-02-01 1995-08-10 Tulip International A/S Systeme, appareil et procede de determination en direct des caracteristiques qualitatives de morceaux de viande, et dispositif d'eclairage de morceaux de viande

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9714955A1 *

Also Published As

Publication number Publication date
WO1997014955A1 (fr) 1997-04-24
DE19642736C2 (de) 2000-03-16
DE19642736A1 (de) 1997-04-17

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