DE102010010323A1 - Method for contactless detection of defects in current thread in textile machine, involves applying operating point displacement of trigger light barriers to shading light barrier such that point of shading barrier is adjusted - Google Patents

Method for contactless detection of defects in current thread in textile machine, involves applying operating point displacement of trigger light barriers to shading light barrier such that point of shading barrier is adjusted Download PDF

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DE102010010323A1
DE102010010323A1 DE102010010323A DE102010010323A DE102010010323A1 DE 102010010323 A1 DE102010010323 A1 DE 102010010323A1 DE 102010010323 A DE102010010323 A DE 102010010323A DE 102010010323 A DE102010010323 A DE 102010010323A DE 102010010323 A1 DE102010010323 A1 DE 102010010323A1
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Prior art keywords
shading
operating point
trigger
barrier
light barriers
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DE102010010323A
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German (de)
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Prof. Dr. Hermanns Ferdinand Josef
Rolf Haasen
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VIENCO GmbH
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VIENCO GmbH
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Priority to DE102010010323A priority Critical patent/DE102010010323A1/en
Priority to PCT/EP2011/053333 priority patent/WO2011107600A1/en
Priority to CN201180012271.3A priority patent/CN102906560B/en
Publication of DE102010010323A1 publication Critical patent/DE102010010323A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
    • G01N21/8914—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined
    • G01N21/8915—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the material examined non-woven textile material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
    • B65H63/062—Electronic slub detector
    • B65H63/065—Electronic slub detector using photo-electric sensing means, i.e. the defect signal is a variation of light energy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

The method involves utilizing a radiate-optical sensor device (1) at a winding-up location or at a winder of a textile machine. An operating point of trigger light barriers (2) is adjusted to given points of time. Operating point displacement of the trigger light barriers is applied to a shading light barrier (3) such that an operating point of the shading light barrier is adjusted in a predeterminable dependence of the operating point displacement of the trigger light barriers. The operating point of the shading light barrier is adjusted proportionally to the operating point displacement.

Description

Die vorliegende Erfindung betrifft ein Verfahren zum berührungslosen Erfassen von Fehlstellen in einem laufenden Faden mit einer strahlenoptischen Sensoreinrichtung nach dem Oberbegriff von Anspruch 1. Unter Fehlstellen werden dabei vor allem abstehende Filamente oder Filamentbrüche, aber auch vom laufenden Faden mitgerissene Teilchen wie Flusen oder Schmutzpartikel verstanden.The present invention relates to a method for the non-contact detection of defects in a running thread with a beam-optical sensor device according to the preamble of claim 1. Under defects are understood in particular protruding filaments or filament breaks, but also entrained by the current thread particles such as lint or dirt particles.

Zur Durchführung derartiger Verfahren sind Filamentbruchsensoren bekannt, die zur Qualitätssicherung im Bereich der technischen Garnherstellung eingesetzt werden. In die Serie eingeführt sind dabei zwei Produkte. Zum einen das sogenannte „Fraytec System” der Firma Enka Tecnica, und zum anderen das „FibreTQS System” der Firma Fibrevision. Beide Systeme erfassen Filamentbrüche und sonstige Fehler auf unterschiedliche Weisen. Während das „Fraytec System” über in verschiedenen Positionen angeordnete Lichtschranken die Filamentbrüche detektiert, misst das „FibreTQS System” die Filamentbrüche über eine Abschattungsoptik im Wege einer Rauschsignalanalyse. Beide Systeme werden auch in der EP 1 288 612 A2 beschrieben.To carry out such processes, filament breakage sensors are known which are used for quality assurance in the field of technical yarn production. Introduced into the series are two products. On the one hand the so-called "Fraytec System" of the company Enka Tecnica, and on the other hand the "FibreTQS System" of the company Fibrevision. Both systems detect filament breaks and other errors in different ways. While the "Fraytec system" detects filament breaks via light barriers arranged in various positions, the "FibreTQS system" measures the filament breaks via a shading optics by means of a noise signal analysis. Both systems are also used in the EP 1 288 612 A2 described.

Eine Kombination der beiden Technologien wurde von der Firma Fibrevision im Jahr 2008 als Dual-Capture-System unter dem Namen „FraytecTQS” vorgestellt. Hierbei werden zum einen die Triggersignale der Filament-Lichtschrankenüberwachung und zum anderen die Fadenstruktur über eine Abschattungsoptik überwacht. Es handelt sich hierbei jedoch immer noch um zwei unterschiedliche Messmethoden, die zwar in einem Sensorgehäuse vereint sind, aber dennoch über separate Auswertungstechnologien verfügen. So werden beispielsweise die Triggerlichtschranken dazu genutzt, um sehr kurze bzw. feine Filamentbrüche zu erfassen, währen die Abschattungsoptik dazu benutzt wird, größere Fehler zu detektieren.A combination of the two technologies was presented by Fibrevision in 2008 as a dual-capture system called "FraytecTQS". Here, on the one hand, the trigger signals of the filament light barrier monitoring and, on the other hand, the thread structure are monitored via a shading optics. However, these are still two different measurement methods, which are combined in a sensor housing, but still have separate evaluation technologies. For example, the trigger light barriers are used to detect very short or fine filament breaks, while the shading optics are used to detect larger errors.

Das kombinierte System hat mindestens drei Lichtschranken, von denen eine als sogenannte Abschattungslichtschranke eine vom laufenden Faden durchquerte Abschattungsoptik bildet, welche die Struktur des laufenden Fadens erfasst, und von denen mindestens zwei weitere Triggerlichtschranken in unterschiedlichem Abstand zum Faden und/oder auf verschiedenen Seiten des Fadens derart angeordnet sind, dass nur Fehlstellen des laufenden Fadens zu einer Abschattung der Triggerlichtschranken führen.The combined system has at least three light barriers, one of which forms a shading optics traversed by the current thread as a so-called shading light barrier, which detects the structure of the running thread, and of which at least two further trigger light barriers at different distances to the thread and / or on different sides of the thread are arranged so that only defects of the current thread lead to shading of the trigger photocells.

Da das Messsystem grundsätzlich aus mehreren, flächig angeordneten Lichtschranken besteht, kann eine Verschmutzung der Abschattungslichtschranke 3 erkannt und kompensiert werden. So wird der Arbeitspunkt der Triggerlichtschranken 2, die im normalen Arbeitsmodus nicht durch das Messgut 5 abgeschattet werden, ständig oder zu vorgegebenen Zeiten nachgeführt, um somit eine Verschmutzung zu kompensieren.Since the measuring system basically consists of several, surface-mounted light barriers, contamination of the shading light barrier can 3 be recognized and compensated. This is how the operating point of the trigger light barriers becomes 2 in the normal working mode, not through the material to be measured 5 be shadowed, continuously or at predetermined times tracked, so as to compensate for pollution.

Eine derartig einfache Nachführung der Abschattungslichtschranke 3 kann dagegen nicht realisiert werden, da dann auch eine Abschattung aufgrund des Messgutes 5 kompensiert werden würde. Nutz man aber die durch die Triggerlichtschranken 2 vorgegebenen Arbeitspunktverschiebungen, so können diese Informationen genutzt werden, um eine ähnliche bzw. gleiche Verschmutzung die im Bereich der Abschattungslichtschranke 3 auftritt, zu kompensieren (eine durch die Triggerlichtschranken 2 geführte Schmutzkompensation).Such a simple tracking of the Abschattungslichtschranke 3 on the other hand can not be realized, as then also shading due to the material to be measured 5 would be compensated. But you can use the through the trigger light barriers 2 given operating point shifts, this information can be used to a similar or same pollution in the field of Abschattungslichtschranke 3 occurs, to compensate (one through the trigger photocells 2 guided dirt compensation).

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • EP 1288612 A2 [0002] EP 1288612 A2 [0002]

Claims (2)

Verfahren zum berührungslosen Erfassen von Fehlstellen in einem laufenden Faden (5), wobei Fehlstellen insbesondere durch abstehende Filamente (7) oder durch Filamentbrüchen oder durch mitgerissene Schmutzpartikel oder Flusen gebildet sind, wobei an einer Textilmaschine, vorzugsweise an einer Aufspulstelle oder an einem Wickler einer Textilmaschine, eine strahlenoptische Sensoreinrichtung (1) mit mindestens drei Lichtschranken (2, 3) eingesetzt wird, von denen eine als Abschattungslichtschranke bezeichnete erste Lichtschranke (3) eine vom laufenden Faden (5) durchquerte Abschattungsoptik bildet, welche die Struktur des laufenden Fadens (5) erfasst, und von denen mindestens zwei weitere Triggerlichtschranken (2) in unterschiedlichem Abstand zum Faden (5) und/oder auf verschiedenen Seiten des Fadens (5) derart angeordnet sind, dass nur Fehlstellen des laufenden Fadens (5) zu einer Abschattung der Triggerlichtschranken führen, wobei der Arbeitspunkt der Triggerlichtschranken ständig oder zu vorgegebenen Zeitpunkten zur Kompensation von möglichen Verschmutzungen der Triggerlichtschranken oder zur Unterdrückung von Alterserscheinungen der Bauelemente der strahlenoptischen Sensoreinrichtung eingestellt oder nachgeführt wird, dadurch gekennzeichnet, dass eine bei den Triggerlichtschranken (2) eingetretene Arbeitspunktverschiebung derart auf die Abschattungslichtschranke (3) angewandt wird, dass der Arbeitspunkt der Abschattungslichtschranke (3) in einer vorgebbaren Abhängigkeit von der Arbeitspunktverschiebung der Triggerlichtschranken (2) eingestellt oder nachgeführt wird.Method for the contactless detection of defects in a running thread ( 5 ), whereby defects in particular by protruding filaments ( 7 ) or by filament breaks or by entrained dirt particles or lint, wherein on a textile machine, preferably at a winding station or on a winder of a textile machine, a radiation-optical sensor device ( 1 ) with at least three light barriers ( 2 . 3 ) is used, of which a first photoelectric barrier designated as a shading light barrier ( 3 ) one of the running thread ( 5 ) crossed shading optics forming the structure of the running thread ( 5 ), and of which at least two further trigger light barriers ( 2 ) at different distances to the thread ( 5 ) and / or on different sides of the thread ( 5 ) are arranged such that only defects of the running thread ( 5 ) lead to a shading of the trigger photocells, wherein the operating point of the trigger photocells is set or tracked continuously or at predetermined times to compensate for possible contamination of the trigger light barriers or to suppress signs of aging of the components of the optical radiation sensor device, characterized in that a in the trigger light barriers ( 2 ) occurred operating point shift in such a way on the Abschattungslichtschranke ( 3 ) that the operating point of the shading light barrier ( 3 ) in a predefinable dependence on the operating point shift of the trigger light barriers ( 2 ) is set or tracked. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass der Arbeitspunkt der Abschattungslichtschranke (3) proportional zur Arbeitspunktverschiebung der Triggerlichtschranken (2) eingestellt wird.A method according to claim 1, characterized in that the operating point of the Abschattungslichtschranke ( 3 ) proportional to the operating point shift of the trigger light barriers ( 2 ) is set.
DE102010010323A 2010-03-04 2010-03-04 Method for contactless detection of defects in current thread in textile machine, involves applying operating point displacement of trigger light barriers to shading light barrier such that point of shading barrier is adjusted Withdrawn DE102010010323A1 (en)

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Application Number Priority Date Filing Date Title
DE102010010323A DE102010010323A1 (en) 2010-03-04 2010-03-04 Method for contactless detection of defects in current thread in textile machine, involves applying operating point displacement of trigger light barriers to shading light barrier such that point of shading barrier is adjusted
PCT/EP2011/053333 WO2011107600A1 (en) 2010-03-04 2011-03-04 Method for detecting imperfections in a running thread having improved working point adjustment
CN201180012271.3A CN102906560B (en) 2010-03-04 2011-03-04 Method for detecting imperfections in a running thread having improved working point adjustment

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DE102010010323A DE102010010323A1 (en) 2010-03-04 2010-03-04 Method for contactless detection of defects in current thread in textile machine, involves applying operating point displacement of trigger light barriers to shading light barrier such that point of shading barrier is adjusted

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1798035A1 (en) * 1968-08-09 1971-11-25 Visomat Geraete Gmbh Thread monitoring device (lint guard)
EP0444433B1 (en) * 1990-03-02 1997-06-25 TEMIC TELEFUNKEN microelectronic GmbH Circuit arrangement for opto-electronic Schmitt trigger
EP0584321B1 (en) * 1992-03-17 2001-09-26 Zellweger Luwa Ag Process and device for detecting impurities in a textile test sample
EP1288612A2 (en) 2001-08-25 2003-03-05 Fibrevision Limited Yarn monitoring
DE10161502A1 (en) * 2001-12-14 2003-06-26 Arteva Tech Sarl Method and device for the continuous determination and localization of thread defects of a thread sheet running in one plane
DE10353892A1 (en) * 2003-11-18 2005-06-16 Ulrich Hellak Tree trunk measurement unit is digitally controlled and calibrated by stepwise increases of optical transmit power to create individual corrections relative to reference receiver

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1798035A1 (en) * 1968-08-09 1971-11-25 Visomat Geraete Gmbh Thread monitoring device (lint guard)
EP0444433B1 (en) * 1990-03-02 1997-06-25 TEMIC TELEFUNKEN microelectronic GmbH Circuit arrangement for opto-electronic Schmitt trigger
EP0584321B1 (en) * 1992-03-17 2001-09-26 Zellweger Luwa Ag Process and device for detecting impurities in a textile test sample
EP1288612A2 (en) 2001-08-25 2003-03-05 Fibrevision Limited Yarn monitoring
DE10161502A1 (en) * 2001-12-14 2003-06-26 Arteva Tech Sarl Method and device for the continuous determination and localization of thread defects of a thread sheet running in one plane
DE10353892A1 (en) * 2003-11-18 2005-06-16 Ulrich Hellak Tree trunk measurement unit is digitally controlled and calibrated by stepwise increases of optical transmit power to create individual corrections relative to reference receiver

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Oerlikon Fibrevision: Fraytec-On Line Monitoring Technical and Industrial Yarn, 01/08 Fraytec MV System *

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