EP0816554B1 - Draft correcting method - Google Patents

Draft correcting method Download PDF

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Publication number
EP0816554B1
EP0816554B1 EP19970110531 EP97110531A EP0816554B1 EP 0816554 B1 EP0816554 B1 EP 0816554B1 EP 19970110531 EP19970110531 EP 19970110531 EP 97110531 A EP97110531 A EP 97110531A EP 0816554 B1 EP0816554 B1 EP 0816554B1
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EP
European Patent Office
Prior art keywords
pattern
product web
image
web
distortion
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Revoked
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EP19970110531
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German (de)
French (fr)
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EP0816554A1 (en
Inventor
Michel Bruni
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Mahlo GmbH and Co KG
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Mahlo GmbH and Co KG
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Priority claimed from DE19640023A external-priority patent/DE19640023B4/en
Application filed by Mahlo GmbH and Co KG filed Critical Mahlo GmbH and Co KG
Priority to DE29723696U priority Critical patent/DE29723696U1/en
Publication of EP0816554A1 publication Critical patent/EP0816554A1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F33/00Indicating, counting, warning, control or safety devices
    • B41F33/0036Devices for scanning or checking the printed matter for quality control
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06HMARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H3/00Inspecting textile materials
    • D06H3/08Inspecting textile materials by photo-electric or television means
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06HMARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H3/00Inspecting textile materials
    • D06H3/12Detecting or automatically correcting errors in the position of weft threads in woven fabrics
    • D06H3/125Detecting errors in the position of weft threads

Definitions

  • the invention relates to a method for correcting distortion according to the preamble of claim 1 or 2.
  • Warp correction device and a corresponding method known in which the location of the warp and Weft threads are detected optically and in a subsequent one Correction device, in particular a straightening machine, this delay due to the optically detected misalignment of Warp and weft threads are corrected.
  • a delay correction is purely based on the position of the Warp and weft threads not possible or not sensible, rather is that of printed or otherwise on the web recognizable patterns outgoing visual impression consider.
  • the web can be, for example, the printing press with a perfectly printed pattern. Nevertheless, the weft is often in such cases under the printed pattern not straight but more or less warped. If such goods with a conventional Distortion correction device is treated, originally perfectly applied patterns are warped and the overall visual impression suffer.
  • FR-A-2 659 8 99 a method for the automatic recognition and for the transfer of labels or images onto textiles is known, which concerns the control of a thermal transfer unit.
  • the position of the labels or images to be printed or transferred is recorded with a camera device in order to then activate a thermal printing press, if necessary, after the position has been corrected, so that the motif is fixed accordingly on the textile base.
  • EP 0 450 259 A1 discloses a device for controlling warpage using an optoelectronic reading device. This reading device is in the immediate vicinity of the led moving path. Such sensors are for industrial conditions not suitable because there is a strong Pollution is expected, so downtime and Production interruptions are the result.
  • DE 36 39 636 A1 shows a method for automatic inspection of textile webs.
  • Goods surface with an arrangement of several similar Color area cameras are captured in sections, the Signals of the primary colors obtained are digitized and used Color error detection can be processed further.
  • the color evaluation signals are then compared to values obtained from a free of charge sample and obtained in one Memory are stored.
  • the object of the present invention is a faster, more reliable and less expensive distortion correction a patterned web enable.
  • a key concept of the present invention is through an image capturing device recognizable on the web Record patterns and in an image processing facility to process with the generation of control signals, taking into account the subsequent processing of the web that generated in the image processing device Control signals occur.
  • the pattern be a color sample or based on differences in brightness.
  • the web can be used in many different ways Pattern.
  • a pattern can be created by printing his.
  • the pattern can also be woven or as with curtains and peaks come about.
  • the method works without previously entered sample data (scanned original or Comparison reference).
  • the pattern as such is due to the criteria examined for each individual exposure and the parameters formed therefrom recognized.
  • Examined criteria can be, for example: line elements, edges and / or Color boundaries.
  • Patterns are recorded in a recording and the deviation is recognized. This works even if there is less in the shot can be seen as a model unit.
  • the individual Image signals with those provided in a previous step Comparing information about the pattern to be recognized.
  • This information is expediently, for example a scanned template of the sample unit or the length information entered in a suitable scaling the repeat of the image processing device, stored there and taken into account in the image processing.
  • a comparison signal with previously stored information which is the size of the pattern in Includes transverse and / or longitudinal direction of the web.
  • the correction device can use this comparison signal be adjusted or regulated so that the Web, in particular the corresponding sample unit in Longitudinal and / or transverse direction stretched or shrunk accordingly becomes.
  • the image processing advantageously recognizes its device from the recorded image signals length or repeat or Lead time of a sample unit on the web, where this by comparing several image signals from different ones Sample units or by comparison with one in a previous one Step stored length information, for example the length of the sample unit on the printing form, can happen.
  • the image capture device Illuminates a section of the picture that covers only one Fraction of the width of the web extends.
  • the length information obtained is advantageously even used in the following pictures.
  • Through the Length information obtained can be, for example, the Image detail that is useful for measuring the warpage, to adjust.
  • the length information obtained passed on to the processing control device so that a processing of the web under consideration the length information is carried out according to the report can be.
  • the length information obtained also stretching or shrinking of the web, in particular can be controlled or regulated in a correction device.
  • Such one Speed signal can be on the conveyor of the Tapping off the web without further ado.
  • the image signals are used for Distortion and repeat measurement independently, for example by at least two separate image capture devices or recorded sequentially in two time windows.
  • the Image signals when the web is running, preferably in the running direction after the processing device, in particular correction device added.
  • FIG. 1 shows an embodiment of the device according to the invention schematically illustrated.
  • a web 11 is shown in dash-dotted lines running from left to right.
  • the web 11 passes through a processing device or correction device 19, in particular one Clamping frame and then another processing device 20.
  • the correction device 19 has one Inlet 31 and an outlet 32, the inlet 31 in Direction of travel of the web 11 considered before and the outlet 32 is arranged after the correction device 19.
  • image capture devices 13 and 13 'are There are two separate image capture devices on the inlet side 13 and 13 'are provided. There are also two on the outlet side Image capture devices 24 and 24 'are provided.
  • the image capture devices 13, 13 ', 24, 24' provide image signals 14 (see FIG. 3) to the image processing device 15. You are useful as CCD cameras, especially CCD color cameras educated.
  • FIG. 1 represents the full expansion in which two image capture devices 13, 24 for the Print pattern straightening (inlet / outlet) and two image capture devices 13 ', 24' for repeat measurement (Inlet / outlet) are provided.
  • the image capture devices are intended 13 and 24 for pattern straightening and Image capture devices 13 'and 24' for repeat measurement be provided.
  • the image acquisition devices provided for the repeat measurement 13 'and 24' have an image section 30 which from an image section 33 of the for pattern alignment provided image capture device 13 or 24 different is.
  • the image section 33 for repeat measurement a narrow strip in the longitudinal direction of the web illuminated, the strip in the longitudinal direction of the web preferably longer than an assumed repeat should.
  • a commercially available camera there is of course a certain rectangular recording area specified so that the strips of material web 11 not illuminated by the camera can be made arbitrarily narrow.
  • the image section 33 of the distortion measurement Image capture device 13 can be any illuminate appropriate section of the pattern, this Cutout but cover the entire width of the web should. It goes without saying that when Image signals through the image capture devices 13, 13 ', 24, 24 'the web must run smoothly. When it comes to that alone Delay correction goes, the inventive method also applicable to webs with an endless pattern are provided.
  • the image processing device stands 15 with a machining control device 18 in connection.
  • the machining control device 18 controls both the processing device or correction device 19 and the further processing device 20.
  • Die Machining control device 18 can of course also be used the image processing device 15 a common data processing device form.
  • FIG. 2 is a sketch of a plan view of a section the web 11 already mentioned.
  • the web 11 is printed with a pattern, the pattern from a plurality arranged in the longitudinal direction of the web Pattern units 23 is formed.
  • the length (repeat) of a sample unit is marked - further are the dashed lines of the image sections already mentioned 30 and 33. It can be seen that the image section 30 recorded during the distortion measurement via the entire width of the web 11 extends, whereas the image section 33 for repeat measurement over the length of a Rapportes extends.
  • the image capture devices 13, 13 ', 24, 24' provide image signals 14 which are in the image processing device 15 are processed.
  • the Image processing device 15 can in addition to the image signals information 21 about the pattern can still be supplied. Also can the image processing device a conveyor speed signal 26 of the web are fed. In the image processing facility 15 can take the pictures taken or image signals with previous images and / or information about the pattern, possibly including the conveyor speed signal 26 are compared.
  • the image processing device 15 is also able to without the sample layer capture previous information directly from a recording.
  • the image processing device 15 generates control signals 29, which are forwarded to the processing control device 18 become.
  • the processing control device 18 controls the subsequent processing procedure, especially one Straightening 16 in the correction device 19 and / or a processing procedure 17 in the further processing device 20th
  • the method according to the invention and the device according to the invention avoids rejects by crooked pressure or by Waste increases quality and saves complaints. In addition to relieving the staff, there is also an increase the production speed.
  • the procedure is basically suitable for all goods in web form, which have a regularly repeated pattern. typical Applications can be found in fabric printing, lace, curtains and carpets.

Description

Die Erfindung betrifft ein Verfahren zur Verzugskorrektur gemäß Oberbegriff des Patentanspruchs 1 bzw. 2.The invention relates to a method for correcting distortion according to the preamble of claim 1 or 2.

Derartige Verfahren und Vorrichtungen sind bereits bekannt. Beispielsweise ist eine Verzugskorrekturvorrichtung und ein entsprechendes Verfahren bekannt, bei dem die Lage der Kettund Schußfäden optisch erfaßt wird und in einer anschließenden Korrektureinrichtung, insbesondere einer Richtmaschine, dieser Verzug aufgrund der optisch erfaßten Fehllage von Kett- und Schußfäden korrigiert wird.Such methods and devices are already known. For example, a warp correction device and a corresponding method known in which the location of the warp and Weft threads are detected optically and in a subsequent one Correction device, in particular a straightening machine, this delay due to the optically detected misalignment of Warp and weft threads are corrected.

Oftmals ist aber eine Verzugskorrektur rein nach der Lage der Kett- und Schußfäden nicht möglich bzw. nicht sinnvoll, vielmehr ist der von aufgedruckten oder anderweitig auf der Warenbahn erkennbaren Mustern ausgehende optische Eindruck zu berücksichtigen. Die Warenbahn kann beispielsweise die Druckmaschine mit perfekt aufgedrucktem Muster verlassen haben. Trotzdem ist in solchen Fällen oftmals der Schußfadenverlauf unter dem aufgedruckten Muster nicht gerade sondern mehr oder weniger verzogen. Wenn eine solche Ware mit einer herkömmlichen Verzugskorrektureinrichtung behandelt wird, kann das ursprünglich perfekt aufgebrachte Muster verzogen werden und der optische Gesamteindruck leiden.Often, however, a delay correction is purely based on the position of the Warp and weft threads not possible or not sensible, rather is that of printed or otherwise on the web recognizable patterns outgoing visual impression consider. The web can be, for example, the printing press with a perfectly printed pattern. Nevertheless, the weft is often in such cases under the printed pattern not straight but more or less warped. If such goods with a conventional Distortion correction device is treated, originally perfectly applied patterns are warped and the overall visual impression suffer.

Weiterhin wird oftmals bedruckte Rohware über weite Strecken in Form von Warenbahnen transportiert bevor sie in irgendeiner Form weiterverarbeitet wird. Auch beim Transport oder innerhalb der Weiterverarbeitung kann die Warenbahn bzw. das Muster verzogen werden, so daß ein mustergerechtes Richten notwendig wird. Das Richten verzogener, mit Mustern bedruckter oder anderweitig mit Mustern versehener Warenbahnen, war bislang nur manuell möglich. Dies erfordert aber einen hohen personellen Aufwand. Die Produktionsgeschwindigkeit ist aufgrund des manuellen Richtens zwangsläufig gering.Furthermore, printed raw goods are often used over long distances in the form of webs before being transported in any Form is processed. Even during transport or within the web or the Patterns are warped so that a pattern-oriented judging becomes necessary. Straightening warped, printed with patterns or otherwise patterned webs previously only possible manually. But this requires a high one personnel expenditure. The production speed is due of manual judging inevitably low.

Aus der FR-A-2 659 8 99 ist ein Verfahren zur automatischen Erkennung und zum Übertragen von Etiketten oder Bildern auf Textilien bekannt, wobei es dort um die Steuerung einer Thermotransfer-Einheit geht.
Im einzelnen wird mit einer Kameravorrichtung die Position zu druckender bzw. zu übertragender Etiketten oder Bilder erfaßt, um dann gegebenenfalls nach Lagekorrektur eine Thermodruckpresse zu aktivieren, so daß das Motiv auf der textilen Unterlage entsprechend fixiert ist.
From FR-A-2 659 8 99 a method for the automatic recognition and for the transfer of labels or images onto textiles is known, which concerns the control of a thermal transfer unit.
In particular, the position of the labels or images to be printed or transferred is recorded with a camera device in order to then activate a thermal printing press, if necessary, after the position has been corrected, so that the motif is fixed accordingly on the textile base.

Die EP 0 450 259 A1 offenbart eine Vorrichtung zur Verzugssteuerung unter Nutzung einer optoelektronischen Leseeinrichtung. Diese Leseeinrichtung wird in unmittelbarer Nähe der bewegten Bahn geführt. Eine solche Sensorik ist für Industriebedingungen nicht geeignet, da dort mit einer starken Verschmutzung zu rechnen ist, so daß Ausfallzeiten und Produktionsunterbrechungen die Folge sind.EP 0 450 259 A1 discloses a device for controlling warpage using an optoelectronic reading device. This reading device is in the immediate vicinity of the led moving path. Such sensors are for industrial conditions not suitable because there is a strong Pollution is expected, so downtime and Production interruptions are the result.

Aus der US-PS 3,193, 688 ist eine Richtmaschine mit einem fotosensitiven Detektor vorbekannt, wobei dort eine Schlitzblende vorhanden ist und von einer Strahlungsmodulation ausgegangen wird. Diese Modulation wird durch die bewegte Warenbahn, d.h. durch die Struktur des Gewebes oder Gewirkes selbst erreicht.From US-PS 3,193, 688 is a straightening machine with a Previously known photosensitive detector, where there is a slit diaphragm is present and from a radiation modulation is assumed. This modulation is moved by the Web, i.e. through the structure of the woven or knitted fabric achieved itself.

Letztendlich zeigt die DE 36 39 636 A1 ein Verfahren zur automatischen Inspektion von Textilbahnen. Dort soll die Warenoberfläche mit einer Anordnung mehrerer gleichartiger Farbflächenkameras ausschnittsweise erfaßt werden, wobei die Signale der erhaltenen Primärfarben digitalisiert und zur Farbfehler-Erkennung weiter verarbeitet werden. Die Farbauswertesignale werden dann mit Werten verglichen, die von einer felerfreien Warenprobe vorab gewonnen und in einem Speicher abgelegt sind. Ultimately, DE 36 39 636 A1 shows a method for automatic inspection of textile webs. There is said Goods surface with an arrangement of several similar Color area cameras are captured in sections, the Signals of the primary colors obtained are digitized and used Color error detection can be processed further. The color evaluation signals are then compared to values obtained from a free of charge sample and obtained in one Memory are stored.

Die Aufgabe der vorliegenden Erfindung liegt darin, eine schnellere, zuverlässigere und kostengünstigere Verzugskorrektur einer mit einem Muster versehenen Warenbahn zu ermöglichen.The object of the present invention is a faster, more reliable and less expensive distortion correction a patterned web enable.

Diese Aufgabe wird durch die Mer kmale der Patentansprüche 1 oder 2 gelöst.This object is achieved by the mer kmale of patent claims 1 or 2 solved.

Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.Advantageous further developments are specified in the subclaims.

Ein Kerngedanke der vorliegenden Erfindung liegt darin, durch eine Bilderfassungsvorrichtung das auf der Warenbahn erkennbare Muster aufzunehmen und in einer Bildverarbeitungseinrichtung unter Erzeugung von Steuersignalen zu verarbeiten, wobei die anschließende Bearbeitung der Warenbahn unter Berücksichtigung der in der Bildverarbeitungseinrichtung erzeugten Steuersignale erfolgt. Das Muster kann beispielsweise ein Farbmuster sein oder auf Helligkeitsunterschieden beruhen. Die Warenbahn kann auf unterschiedlichste Weise mit dem Muster versehen sein. Ein Muster kann durch Bedrucken erzeugt sein. Das Muster kann auch eingewebt sein oder wie bei Gardinen und Spitzen zustandekommen.A key concept of the present invention is through an image capturing device recognizable on the web Record patterns and in an image processing facility to process with the generation of control signals, taking into account the subsequent processing of the web that generated in the image processing device Control signals occur. For example, the pattern be a color sample or based on differences in brightness. The web can be used in many different ways Pattern. A pattern can be created by printing his. The pattern can also be woven or as with curtains and peaks come about.

In einer bevorzugten Ausbildung arbeitet das Verfahren ohne vorher eingegebene Musterdaten (eingescannte Vorlage, bzw. Vergleichsreferenz). Das Muster wird als solches aufgrund der bei jeder einzelnen Aufnahme untersuchten Kriterien und der daraus gebildeten Parameter erkannt. Untersuchte Kriterien können beispielsweise sein: Linienelemente, Kanten und/oder Farbgrenzen.In a preferred embodiment, the method works without previously entered sample data (scanned original or Comparison reference). The pattern as such is due to the criteria examined for each individual exposure and the parameters formed therefrom recognized. Examined criteria can be, for example: line elements, edges and / or Color boundaries.

Es muß nicht zwischen zwei aufeinanderfolgenden Aufnahmen verglichen werden. Bei dem bevorzugten Verfahren wird das Muster in einer Aufnahme erfaßt und die Abweichung erkannt. Dies funktioniert selbst dann, wenn in der Aufnahme weniger als eine Mustereinheit zu sehen ist. It doesn't have to be between two consecutive shots be compared. In the preferred method, this is Patterns are recorded in a recording and the deviation is recognized. This works even if there is less in the shot can be seen as a model unit.

In einer alternativen Ausgestaltung werden die einzelnen Bildsignale mit in einem vorhergehenden Schritt bereitgestellten Informationen über das zu erkennende Muster verglichen. Zweckmäßigerweise werden diese Informationen, beispielsweise eine eingescannte Vorlage der Mustereinheit oder die in geeigneter Skalierung eingegebene Längeninformation des Rapportes der Bildverarbeitungseinrichtung zugeführt, dort abgespeichert und bei der Bildverarbeitung berücksichtigt.In an alternative embodiment, the individual Image signals with those provided in a previous step Comparing information about the pattern to be recognized. This information is expediently, for example a scanned template of the sample unit or the length information entered in a suitable scaling the repeat of the image processing device, stored there and taken into account in the image processing.

In einer Weiterbildung dieser alternativen Ausgestaltung werden die im vorhergehenden Schritt gespeicherten Informationen mit den aufgenommenen Bildsignalen verglichen. Aus dem Vergleich wird ein Vergleichssignal gewonnen, das in Form des bereits erwähnten Steuersignals der Bearbeitungssteuereinrichtung zugeführt wird. Die Bearbeitungsprozedur, insbesondere das Richten erfolgt dann unter Berücksichtigung des Vergleichssignals.In a further development of this alternative embodiment the information stored in the previous step compared with the recorded image signals. From the comparison a comparison signal is obtained, which is in the form of the already mentioned control signal of the processing control device is fed. The processing procedure, in particular the straightening then takes into account the comparison signal.

Bei beiden alternativen Ausgestaltungen ist aber auch prinzipiell ein Vergleich aus einer fortlaufenden Bilderfassung der in Längsrichtung der Warenbahn angeordneten Mustereinheiten denkbar. Dabei wird die Information eines aufgenommenen Bildes mit den Informationen eines oder einer Vielzahl vorher aufgenommener Bilder verglichen. Das Vergleichssignal umfaßt dabei beispielsweise eine über die Breite der Warenbahn sich verändernde Größe oder Abweichung, insbesondere ein Schräg-, Bogen- oder Wellenverzug. Die Korrektureinrichtung wird dann unter Berücksichtigung des Vergleichssignals zur Korrektur des Schräg-, Bogen- oder Wellenverzuges eingestellt oder geregelt .In both alternative configurations, however, is also a principle a comparison from a continuous image acquisition of the pattern units arranged in the longitudinal direction of the web conceivable. This is the information of a captured image with the information of one or a lot beforehand compared recorded images. The comparison signal includes for example, one across the width of the web changing size or deviation, especially an oblique, Bow or wave distortion. The correction device is then taking into account the comparison signal for correction of inclined, curved or wave distortion set or controlled ,

Es läßt sich durch fortlaufende Bilderfassung und/oder durch Vergleich mit zuvor abgespeicherter Information ein Vergleichssignal gewinnen, welches die Größe des Musters in Quer- und/oder Längsrichtung der Warenbahn umfaßt. Unter Berücksichtigung dieses Vergleichssignals kann die Korrektureinrichtung derart eingestellt oder geregelt werden, daß die Warenbahn, insbesondere die entsprechende Mustereinheit in Längs- und/oder Querrichtung entsprechend gedehnt oder gekrumpft wird.It can be done by continuous image acquisition and / or A comparison signal with previously stored information which is the size of the pattern in Includes transverse and / or longitudinal direction of the web. Considering the correction device can use this comparison signal be adjusted or regulated so that the Web, in particular the corresponding sample unit in Longitudinal and / or transverse direction stretched or shrunk accordingly becomes.

Vorteilhafterweise erkennt die Bildverarbeitung seinrichtung aus den aufgenommenen Bildsignalen Länge oder Rapport bzw. Durchlaufzeit einer Mustereinheit auf der Warenbahn, wobei dies durch Vergleich von mehreren Bildsignalen verschiedener Mustereinheiten oder durch Vergleich mit einer in einem vorhergehenden Schritt gespeicherten Längeninformation, beispielsweise der Länge der Mustereinheit auf der Druckform, geschehen kann.The image processing advantageously recognizes its device from the recorded image signals length or repeat or Lead time of a sample unit on the web, where this by comparing several image signals from different ones Sample units or by comparison with one in a previous one Step stored length information, for example the length of the sample unit on the printing form, can happen.

Vorzugsweise ist zur Erkennung des Rapportes jedoch eine weitere Bilderfassungsvorrichtung vorgesehen. Zu Zwecken der Rapporterkennung genügt es, daß die Bilderfassungsvorrichtung einen Bildausschnitt beleuchtet, der sich nur über einen Bruchteil der Breite der Warenbahn erstreckt.However, another is preferred for recognizing the repeat Image capture device provided. For the purposes of Repeat detection is sufficient for the image capture device Illuminates a section of the picture that covers only one Fraction of the width of the web extends.

Vorteilhafterweise wird die gewonnene Längeninformation selbst bei der nachfolgenden Bilder Fassung genutzt. Durch die gewonnene Längeninformation läßt sich beispielsweise der Bildausschnitt, der zum Messen des Verzuges zweckmäßig ist, einstellen.The length information obtained is advantageously even used in the following pictures. Through the Length information obtained can be, for example, the Image detail that is useful for measuring the warpage, to adjust.

In einer vorteilhaften Ausgestaltung wird die gewonnene Längeninformation an die Bearbeitungssteuereinrichtung weitergegeben, so daß ein Bearbeiten der Warenbahn unter Berücksichtigung der Längeninformation rapportgetreu durchgeführt werden kann.In an advantageous embodiment, the length information obtained passed on to the processing control device, so that a processing of the web under consideration the length information is carried out according to the report can be.

Insbesondere kann mittels der gewonnenen Längeninformation auch eine Dehnung oder Krumpfung der Warenbahn, insbesondere in einer Korrektureinrichtung gesteuert oder geregelt werden. Ebenso läßt sich über die gewonnene Längeninformation die Voreilung automatisch einstellen oder regeln. Dies entlastet das Bedienpersonal und steigert die Geschwindigkeit.In particular, by means of the length information obtained also stretching or shrinking of the web, in particular can be controlled or regulated in a correction device. You can also use the length information obtained Set or regulate advance automatically. This relieves the operating personnel and increases the speed.

Zweckmäßig ist es weiterhin, der Bildverarbeitungseinrichtung ein Geschwindigkeitssignal der Warenbahn zuzuführen und dieses bei der Bildverarbeitung zu berücksichtigen. Ein solches Geschwindigkeitssignal läßt sich an der Fördereinrichtung der Warenbahn ohne weiteres abgreifen.It is also expedient to use the image processing device to supply a speed signal to the web and this to be taken into account in image processing. Such one Speed signal can be on the conveyor of the Tapping off the web without further ado.

In einer bevorzugten Ausgestaltung werden die Bildsignale zur Verzugs- und Rapportmessung unabhängig voneinander beispielsweise durch mindestens zwei separate Bilderfassungsvorrichtungen oder zeitlich nacheinander in zwei Zeitfenstern aufgenommen.In a preferred embodiment, the image signals are used for Distortion and repeat measurement independently, for example by at least two separate image capture devices or recorded sequentially in two time windows.

In einer besonders vorteilhaften Ausgestaltung werden die Bildsignale bei laufender Warenbahn vorzugsweise in Laufrichtung nach der Bearbeitungseinrichtung, insbesondere Korrektureinrichtung aufgenommen.In a particularly advantageous embodiment, the Image signals when the web is running, preferably in the running direction after the processing device, in particular correction device added.

Da jedoch erst mit Verzögerung auf einen Musterverzug reagiert werden kann, sollte die Entfernung zwischen Korrektureinrichtung und Bilderfassungsvorrichtung möglichst gering sein.However, since there is a delay in responding to a pattern delay the distance between correction device and image capture device as low as possible his.

Durch zwei Bilderfassungsvorrichtungen sowohl am Ein- als auch am Auslauf der Bearbeitungseinrichtung bzw. Korrektureinrichtung sowie durch eine geeignete Verknüpfung der jeweils von ihnen gelieferten Bildsignale läßt sich eine ausgewogene Regelung erreichen.With two image capture devices both on and also at the outlet of the processing device or correction device as well as by a suitable link between each image signals supplied by them can be balanced Achieve regulation.

Die Erfindung wird nachstehend auch hinsichtlich weiterer Merkmale und Vorteile anhand der Beschreibung von Ausführungsbeispielen und unter Bezugnahme auf die beiliegenden Zeichnungen näher erläutert. Hierbei zeigen:

Fig. 1
ein Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung in schematischer Darstellung;
Fig. 2
eine skizzenhafte Darstellung eines mehrere Mustereinheiten umfassenden Ausschnitts aus einer Warenbahn;
Fig. 3
eine Prinzipskizze zur Veranschaulichung des erfindungsgemäßen Verfahrens.
The invention is also explained in more detail below with regard to further features and advantages based on the description of exemplary embodiments and with reference to the accompanying drawings. Here show:
Fig. 1
an embodiment of a device according to the invention in a schematic representation;
Fig. 2
a sketch of a detail comprising a plurality of sample units from a web;
Fig. 3
a schematic diagram to illustrate the method according to the invention.

In Fig. 1 ist eine Ausführungsform der erfindungsgemäßen Vorrichtung schematisch veranschaulicht. Eine Warenbahn 11 ist in strichpunktierter Linie von links nach rechts laufend dargestellt. Die Warenbahn 11 durchläuft eine Bearbeitungseinrichtung bzw. Korrektureinrichtung 19, insbesondere einen Spannrahmen sowie daran anschließend eine weitere Bearbeitungseinrichtung 20. Die Korrektureinrichtung 19 weist einen Einlauf 31 und einen Auslauf 32 auf, wobei der Einlauf 31 in Laufrichtung der Warenbahn 11 betrachtet vor und der Auslauf 32 nach der Korrektureinrichtung 19 angeordnet ist.1 shows an embodiment of the device according to the invention schematically illustrated. A web 11 is shown in dash-dotted lines running from left to right. The web 11 passes through a processing device or correction device 19, in particular one Clamping frame and then another processing device 20. The correction device 19 has one Inlet 31 and an outlet 32, the inlet 31 in Direction of travel of the web 11 considered before and the outlet 32 is arranged after the correction device 19.

Einlaufseitig sind zwei separate Bilderfassungsvorrichtungen 13 und 13' vorgesehen. Auslaufseitig sind ebenfalls zwei Bilderfassungsvorrichtungen 24 und 24' vorgesehen. Die Bilderfassungsvorrichtungen 13, 13', 24, 24' liefern Bildsignale 14 (vgl. Fig. 3) an die Bildverarbeitungseinrichtung 15. Sie sind zweckmäßigerweise als CCD-Kameras, insbesondere CCD-Farbkameras ausgebildet.There are two separate image capture devices on the inlet side 13 and 13 'are provided. There are also two on the outlet side Image capture devices 24 and 24 'are provided. The image capture devices 13, 13 ', 24, 24' provide image signals 14 (see FIG. 3) to the image processing device 15. You are useful as CCD cameras, especially CCD color cameras educated.

Obwohl es theoretisch möglich ist, Musterverzug und Rapport mit nur einer CCD-Kamera zu erkennen, sind die folgenden Kombinationsmöglichkeiten zweckmäßig:

  • Druckmuster-Richten mit einer Kamera wahlweise am Einoder Aus lauf der Korrektureinrichtung, insbesondere des Spannrahmens;
  • Druckmuster-Richten mit zwei CCD-Kameras, wobei die beiden CCD-Kameras am Ein- und Auslauf angeordnet sind;
  • Rapportmessen mit einer CCD-Kamera wahlweise am Ein - oder Auslauf;
  • Rapportmessen mit zwei Kameras, wobei die beiden Kameras am Ein- und Auslauf angeordnet sind.
Although it is theoretically possible to detect pattern distortion and repeat with only one CCD camera, the following combination options are useful:
  • Print pattern straightening with a camera either at the entry or exit of the correction device, in particular the tenter frame;
  • Print pattern straightening with two CCD cameras, the two CCD cameras being arranged at the inlet and outlet;
  • Repeat measurement with a CCD camera either at the inlet or outlet;
  • Repeat measurement with two cameras, the two cameras being arranged at the inlet and outlet.

Die in Fig. 1 gezeigte Ausführungsform stellt den Vollausbau dar, bei dem zwei Bilderfassungsvorrichtungen 13, 24 für das Druckmuster-Richten (Einlauf/Auslauf) und zwei Bilderfassungsvorrichtungen 13', 24' für die Rapportmessung (Einlauf/Auslauf) vorgesehen sind.The embodiment shown in Fig. 1 represents the full expansion in which two image capture devices 13, 24 for the Print pattern straightening (inlet / outlet) and two image capture devices 13 ', 24' for repeat measurement (Inlet / outlet) are provided.

In der nachfolgenden Betrachtung sollen die Bilderfassungsvorrichtungen 13 und 24 für das Druckmuster-Richten und die Bilderfassungsvorrichtungen 13' und 24' für die Rapportmessung vorgesehen sein. Wie bereits in Fig. 1 angedeutet können die für die Rapportmessung vorgesehenen Bilderfassungsvorrichtungen 13' und 24' einen Bildausschnitt 30 aufweisen, der von einem Bildausschnitt 33 der für das Druckmuster-Richten vorgesehenen Bilderfassungsvorrichtung 13 oder 24 verschieden ist.In the following consideration, the image capture devices are intended 13 and 24 for pattern straightening and Image capture devices 13 'and 24' for repeat measurement be provided. As already indicated in Fig. 1 the image acquisition devices provided for the repeat measurement 13 'and 24' have an image section 30 which from an image section 33 of the for pattern alignment provided image capture device 13 or 24 different is.

Es ist zweckmäßig, daß der Bildausschnitt 33 zur Rapportmessung einen schmalen Streifen in Längsrichtung der Warenbahn beleuchtet, wobei der Streifen in Längsrichtung der Warenbahn vorzugsweise länger als ein angenommener Rapport sein sollte. Bei einer handelsüblichen Kamera ist natürlich ein gewisser rechteckiger Aufnahmebereich vorgegeben, so daß der von der Kamera beleuchtete Streifen der Warenbahn 11 nicht beliebig schmal gemacht werden kann.It is expedient that the image section 33 for repeat measurement a narrow strip in the longitudinal direction of the web illuminated, the strip in the longitudinal direction of the web preferably longer than an assumed repeat should. With a commercially available camera there is of course a certain rectangular recording area specified so that the strips of material web 11 not illuminated by the camera can be made arbitrarily narrow.

Der Bildausschnitt 33 der zur Verzugsmessung vorgesehenen Bilderfassungsvorrichtung 13 dagegen kann einen beliebigen zweckmäßigen Ausschnitt des Musters beleuchten, wobei dieser Ausschnitt aber die gesamte Breite der Warenbahn überdecken sollte. Es versteht sich von selbst, daß bei Aufnahme von Bildsignalen durch die Bilderfassungsvorrichtungen 13, 13', 24, 24' die Warenbahn glatt laufen muß. Wenn es allein um die Verzugs korrektur geht, ist das erfindungsgemäße Verfahren auch bei Warenbahnen anwendbar, welche mit einem endlosen Muster vorsehen sind.The image section 33 of the distortion measurement Image capture device 13, however, can be any illuminate appropriate section of the pattern, this Cutout but cover the entire width of the web should. It goes without saying that when Image signals through the image capture devices 13, 13 ', 24, 24 'the web must run smoothly. When it comes to that alone Delay correction goes, the inventive method also applicable to webs with an endless pattern are provided.

Wie bereits aus Fig. 1 erkennbar, steht die Bildverarbeitungseinrichtung 15 mit einer Bearbeitungssteuereinrichtung 18 in Verbindung. Die Bearbeitungssteuereinrichtung 18 steuert sowohl die Bearbeitungseinrichtung bzw. Korrektureinrichtung 19 als auch die weitere Bearbeitungseinrichtung 20. Die Bearbeitungssteuereinrichtung 18 kann selbstverständlich mit der Bildverarbeitungseinrichtung 15 eine gemeinsame Datenverarbeitungseinrichtung bilden.As can already be seen from FIG. 1, the image processing device stands 15 with a machining control device 18 in connection. The machining control device 18 controls both the processing device or correction device 19 and the further processing device 20. Die Machining control device 18 can of course also be used the image processing device 15 a common data processing device form.

In Fig. 2 ist skizzenhaft eine Draufsicht auf einen Ausschnitt der bereits erwähnten Warenbahn 11 gezeigt. Die Warenbahn 11 ist mit einem Muster bedruckt, wobei das Muster aus einer Vielzahl in Längsrichtung der Warenbahn angeordneter Mustereinheiten 23 gebildet wird. Mit Bezugszeichen 25 ist die Länge (Rapport) einer Mustereinheit gekennzeichnet-Weiterhin sind strichliert die bereits genannten Bildausschnitte 30 und 33 veranschaulicht. Zu erkennen ist, daß sich der bei der Verzugsmessung erfaßte Bildausschnitt 30 über die gesamte Breite der Warenbahn 11 erstreckt, wohingegen sich der Bildausschnitt 33 zur Rapportmessung über die Länge eines Rapportes erstreckt.2 is a sketch of a plan view of a section the web 11 already mentioned. The web 11 is printed with a pattern, the pattern from a plurality arranged in the longitudinal direction of the web Pattern units 23 is formed. With reference number 25 the length (repeat) of a sample unit is marked - further are the dashed lines of the image sections already mentioned 30 and 33. It can be seen that the image section 30 recorded during the distortion measurement via the entire width of the web 11 extends, whereas the image section 33 for repeat measurement over the length of a Rapportes extends.

In Fig. 3 ist der Ablauf des erfindungsgemäßen Verfahrens noch einmal skizzenhaft veranschaulicht. Die Bilderfassungsvorrichtungen 13, 13', 24, 24' liefern Bildsignale 14, die in der Bildverarbeitungseinrichtung 15 verarbeitet werden. Der Bildverarbeitungseinrichtung 15 können neben den Bildsignalen noch Informationen 21 über das Muster zugeführt werden. Auch kann der Bildverarbeitungseinrichtung ein Fördergeschwindigkeitssignal 26 der Warenbahn zugeführt werden. In der Bildverarbeitungseinrichtung 15 können die aufgenommenen Bilder bzw. Bildsignale mit früheren Bildern und/oder Informationen über das Muster ggf. unter Einbeziehung des Förderergeschwindigkeitssignals 26 verglichen werden. Die Bildverarbeitungseinrichtung 15 ist aber auch in der Lage, die Musterlage ohne vorherige Information direkt aus einer Aufnahme heraus zu erfassen.3 is the sequence of the method according to the invention once again sketchily illustrated. The image capture devices 13, 13 ', 24, 24' provide image signals 14 which are in the image processing device 15 are processed. The Image processing device 15 can in addition to the image signals information 21 about the pattern can still be supplied. Also can the image processing device a conveyor speed signal 26 of the web are fed. In the image processing facility 15 can take the pictures taken or image signals with previous images and / or information about the pattern, possibly including the conveyor speed signal 26 are compared. The image processing device 15 is also able to without the sample layer capture previous information directly from a recording.

Die Bildverarbeitungseinrichtung 15 erzeugt Steuersignale 29, die an die Bearbeitungssteuereinrichtung 18 weitergeleitet werden. Die Bearbeitungssteuereinrichtung 18 steuert daraufhin die nachfolgende Bearbeitungsprozedur, insbesondere ein Richten 16 in der Korrektureinrichtung 19 und/oder eine Bearbeitungsprozedur 17 in der weiteren Bearbeitungseinrichtung 20. The image processing device 15 generates control signals 29, which are forwarded to the processing control device 18 become. The processing control device 18 then controls the subsequent processing procedure, especially one Straightening 16 in the correction device 19 and / or a processing procedure 17 in the further processing device 20th

Das erfindungsgemäße Verfahren bzw. die erfindungsgemäße Vorrichtung vermeidet Ausschuß durch schiefen Druck oder durch Verschnitt, steigert die Qualität und erspart Reklamationen. Neben der Entlastung des Personals ergibt sich auch eine Erhöhung der Produktionsgeschwindigkeit. Das Verfahren ist grundsätzlich für alle bahnförmig vorliegenden Waren geeignet, die ein regelmäßig wiederholtes Muster aufweisen. Typische Anwendungen finden sich bei Stoffdruck, Spitze, Gardinen und Teppichen.The method according to the invention and the device according to the invention avoids rejects by crooked pressure or by Waste increases quality and saves complaints. In addition to relieving the staff, there is also an increase the production speed. The procedure is basically suitable for all goods in web form, which have a regularly repeated pattern. typical Applications can be found in fabric printing, lace, curtains and carpets.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11)11)
Warenbahnweb
13, 13')13, 13 ')
BilderfassungsvorrichtungImage capture device
14)14)
Bildsignaleimage signals
15)15)
BildverarbeitungseinrichtungImage processing means
16)16)
Bearbeitungsprozedur, RichtenMachining procedure, straightening
17)17)
Bearbeitungsprozedurprocessing procedure
18)18)
BearbeitungssteuereinrichtungProcessing control device
19)19)
Bearbeitungseinrichtung, KorrektureinrichtungProcessing device, correction device
20)20)
Bearbeitungseinrichtungprocessing device
21)21)
Information (über Muster)Information (about samples)
23)23)
Mustereinheitpattern unit
24, 24')24, 24 ')
weitere Bilderfassungsvorrichtungenfurther image capture devices
25)25)
Längeninformation, RapportLength information, repeat
26)26)
Fördere rgeschwindigke itssignalPromote speed signal
29)29)
Steuersignalcontrol signal
30)30)
Bildausschnittimage section
31)31)
Einlaufenema
32)32)
Auslaufoutlet
33)33)
Bildausschnittimage section

Claims (15)

  1. A method for the correction of distortion in a product web (11) printed with a pattern or otherwise provided with optically detectable patterns, with the product web (11) consisting of textile materials, i.e. fabrics, knit fabrics, or knits, and with the pattern being formed by a plurality of pattern units (23) arranged in a longitudinal direction to the product web in a successive repetitive manner by utilising an image detection means,
    characterised in that
    the pattern which is detectable on the product web (11) is taken at least in the transverse direction by a CCD colour camera image detection device (13, 13') and image signals (14) are generated;
    the image signals (14) are supplied to an image processing means (15) and processed therein generating control signals (29); and
    that the subsequent distortion correction of the product web (11) is adjusted or controlled subject to the control signals (29).
  2. The method for the correction of distortion in a product web (11) printed with a pattern or otherwise provided with optically detectable patterns, with the product web (11) consisting of textile materials, i.e. fabrics, knit fabrics, or knits, and with the pattern being formed by a plurality of pattern units (23) arranged in a longitudinal direction to the product web in a successive repetitive manner by utilising an image detection means,
    characterised in that
    the pattern which is detectable on the product web (11) is taken at least in the longitudinal direction by a CCD colour camera image detection device (13, 13') and image signals (14) are generated;
    the image signals (14) are supplied to an image processing means (15) and processed therein generating control signals (29); and
    that subsequently the distortion correction of the product web is adjusted or controlled subject to the control signals (29).
  3. The method according to Claim 1 or 2,
    characterised in that
    information (21) about the pattern to be detected is obtained without previously entering pattern data, solely from the image signals (14) of one or several takings of the product web (11), e.g. by the evaluation of line elements, edges, and/or colour boundaries.
  4. The method according to Claim 1 or 2,
    characterised in that
    said information is obtained with an image sector (30, 33) which exactly covers one pattern unit (23), several pattern units (23), or a fraction of a pattern unit (23).
  5. The method according to Claim 1 or 2,
    characterised in that
    in a previous step information (21) about the pattern to be detected is supplied to the image processing means (15), stored therein, and taken into consideration in the image processing.
  6. The method according to Claim 5,
    characterised in that
    the information (21) stored in the previous step is compared with the image signals (14);
    a reference signal (22) is obtained from the comparison; and
    the respective processing procedure (16, 17) is effected under consideration of the reference signal (22).
  7. The method according to any one of Claims 1 to 6,
    characterised in that
    the processing procedure adjusted or controlled subject to the control signals (29) comprises an alignment (16) of the printed product web (11) in compliance with the taken pattern, with the alignment (16) being carried out in a correction means (16), such as a stenter frame or a straightening machine.
  8. The method according to any one of Claims 1 to 7,
    characterised in that
    a signal, in particular a reference signal, is obtained from a continuous image detection by the image processing means (15) and/or by comparison with previously stored information (21), which comprises a parameter or deviation varying over the width of the product web, i.e. skewed weft, fabric distortion, or wave distortion; and
    the correction means (19) is adjusted or controlled under consideration of the skewed weft, fabric distortion, or wave distortion.
  9. The method according to any one of the previous claims,
    characterised in that
    a signal, in particular a reference signal, is obtained from a continuous image detection by the image processing means (15) and/or by comparison with previously stored information (21), which comprises the size of the pattern in the transverse and longitudinal direction of the product web; and
    the correction means (19) for stentering the product web in the longitudinal and transverse direction for the adjustment and/or control of the transverse and/or longitudinal tension of the product web (11) is adjusted or controlled.
  10. The method according to any one of Claims 1 to 9,
    characterised in that
    the image processing means (15) detects the length or the repeat of the pattern, or the passing time of a pattern unit (23) on the product web (11) automatically, in particular in a continuous image detection, and obtains a length information (25) therefrom;
    with an additional image detection means (24) being provided for this purpose.
  11. The method according to Claim 10,
    characterised in that
    the length information (25) itself is utilised again in the subsequent image detection for establishing a new image sector (30).
  12. The method according to Claim 9,
    characterised in that
    the length information (25) is transferred to a processing control means (18), with the processing control means (18) adjusting or controlling a repeat of the pattern-related processing of the product web (11), in particular the advance or the cutting of the product web.
  13. The method according to any one of Claims 9 to 11,
    characterised in that
    a repeat of the pattern can be determined from the length information (25), and a stretching or shrinkage of the product web (11) is controlled on the basis of the repeat of the pattern.
  14. The method according to any one of the previous claims,
    characterised in that
    from a product conveyor means a conveying velocity signal (26) is obtained with is supplied to the image processing means (15) and taken into consideration in the image processing.
  15. The method according to any one of the previous claims,
    characterised in that
    with the product web (11) passing, the image signals (14) are recorded in the passing direction downstream of the correction means (19), in particular of the straightening machine.
EP19970110531 1996-06-26 1997-06-26 Draft correcting method Revoked EP0816554B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE29723696U DE29723696U1 (en) 1996-06-26 1997-06-26 Distortion correction device

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19625663 1996-06-26
DE19625663 1996-06-26
DE19635320 1996-08-30
DE19635320 1996-08-30
DE19640023 1996-09-27
DE19640023A DE19640023B4 (en) 1996-06-26 1996-09-27 Fast, cost=effective adjustment of travelling patterned textile web - has row of optical units sensing pattern to yield signals fed to video processor for output signals used for distortion correction

Publications (2)

Publication Number Publication Date
EP0816554A1 EP0816554A1 (en) 1998-01-07
EP0816554B1 true EP0816554B1 (en) 2003-04-02

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DE19628319C2 (en) * 1996-07-13 2000-11-23 Monforts Textilmaschinen Gmbh Device for measuring the repeat length of a plastic sample
US6557590B2 (en) 1998-12-29 2003-05-06 Glen Raven, Inc. Decorative outdoor fabrics
DE19939165A1 (en) * 1999-08-20 2001-03-01 Koenig & Bauer Ag Method and device for processing sheets
WO2004086013A1 (en) * 2003-03-27 2004-10-07 Mahlo Gmbh & Co. Kg Method for inspecting the quality criteria of flat textile structures embodied in a multilayer form according to a contour
DE102005018855B4 (en) 2005-04-22 2010-01-28 Theta System Elektronik Gmbh Apparatus for inspecting printed products
DE102007035285B4 (en) * 2007-07-27 2014-11-20 Mahlo Gmbh & Co Kg Device for delay correction of a conveyed, in particular textile web
DE102015114940A1 (en) * 2015-09-07 2017-03-09 A. Monforts Textilmaschinen Gmbh & Co. Kg Apparatus and method for applying liquor to a web
DE102016112405B3 (en) * 2016-07-06 2017-08-17 Gts Gmbh Zählscheibenvorrichtung

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US3193688A (en) * 1960-12-22 1965-07-06 American Cloth Strait Company Photosensitive weft straightener and alignment detector
DE3639636C2 (en) * 1986-11-20 1996-04-18 Robert Prof Dr Ing Massen Automatic inspection of textile webs
JP2539856B2 (en) * 1987-10-15 1996-10-02 株式会社ヒューテック Detecting deviation of print pattern cycle length
FR2659899B1 (en) * 1990-03-23 1992-07-24 Gravurex METHOD FOR AUTOMATICALLY PERFORMING OPERATION ON PATTERNS MADE OF THE SAME STRIP OF FLEXIBLE MATERIAL, AND DEVICE FOR CARRYING OUT SAID METHOD.
US5035030A (en) * 1990-04-05 1991-07-30 Riccardo Pellari Apparatus for controlling and straightening weft and/or warp fabric patterns
CH687138A5 (en) * 1992-02-07 1996-09-30 Bobst Sa A print error detection in a rotary printing machine.

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DE202008007283U1 (en) 2008-02-28 2008-08-14 Mahlo Gmbh & Co. Kg Device for structural, pattern and / or weft detection of a conveyed web

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