EP2331906A1 - Procédé de régulation sans contact de l'épaisseur d'une couche de préparation appliquée sur un fil, et montage pour mettre en oeuvre le procédé - Google Patents

Procédé de régulation sans contact de l'épaisseur d'une couche de préparation appliquée sur un fil, et montage pour mettre en oeuvre le procédé

Info

Publication number
EP2331906A1
EP2331906A1 EP09748215A EP09748215A EP2331906A1 EP 2331906 A1 EP2331906 A1 EP 2331906A1 EP 09748215 A EP09748215 A EP 09748215A EP 09748215 A EP09748215 A EP 09748215A EP 2331906 A1 EP2331906 A1 EP 2331906A1
Authority
EP
European Patent Office
Prior art keywords
yarn
circuit arrangement
electrode
signal
reference electrode
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Withdrawn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
EP09748215A
Other languages
German (de)
English (en)
Inventor
Wolfgang Schäfer
Frank Jenke
Jan Posvic
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.)
Sentex Chemnitz GmbH
Original Assignee
Sentex Chemnitz 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 Sentex Chemnitz GmbH filed Critical Sentex Chemnitz GmbH
Publication of EP2331906A1 publication Critical patent/EP2331906A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/36—Textiles
    • G01N33/365—Filiform textiles, e.g. yarns

Definitions

  • the invention relates to a method for non-contact control of the thickness of a spin finish applied to a yarn and a circuit arrangement for carrying out the method.
  • yarns are needed, which consist of filament yarns with infinitely long fibers that hold together undiluted. Depending on the application, these yarns consist of a different number of filaments, up to yarns of only one filament, the monofilaments.
  • preparation liquid chemical substances
  • Preparations consist of various chemical components, such as lubricants, emulsifiers, antistatic agents, etc. The application is carried out with the aid of preparation fingers or rollers. If the coating quality achieved is insufficient, disruptions of the further processing process, in particular due to thread breaks, for example because of insufficient sliding properties, are the result.
  • the state of the art is to perform a random check of the preparation order outside the technological process in the laboratory as part of quality assurance. Any defects usually affect the entire production batch. Intensity and uniformity of the preparation application are only inadequately determined, the result being only statements on the applied amount on the relevant thread section.
  • the disadvantage of conventional quality control is that it only takes place when the production process is complete and the product is no longer to be changed. In order to reduce the reject rate, an over-preparation could be made. But this is costly and uneconomical and does not avoid production process disturbances.
  • the method is only able to detect long-wave components from the charge progression of the yarn which permit only a low-frequency signal with a narrow-band spectrum.
  • the course of the preparation layer thickness along the thread can only be reflected with a low spatial resolution.
  • the object of the invention is to develop a method for the contactless control of the thickness of a preparation layer applied to a yarn and a circuit arrangement for carrying out the method, which both monitors and optionally controls the preparation application online and continuously in the production process of filament yarn spinning at each spinneret. as well as retrofitting existing textile machines allowed.
  • the advantage of the method according to the invention is that it allows a cost-effective continuous detection of the quality of the applied preparation during the production process and can be installed by its compactness even in difficult and tight machine positions.
  • Fig. 1 shows a circuit arrangement for carrying out the method
  • the electrostatic field effect emanating from the yarn is detected directly, without detours by field compensation, via the effect of influence caused by the field effect, as a shift of charges in an electrode subsequently generates an electrical voltage proportional to the charge in accordance with the influence effect.
  • This electrical voltage is evaluated according to their height and their course. The evaluation can be carried out in such a way that, when it exceeds or falls short of a stored Default value an error signal is generated, but it is also possible to use the voltage generated to control the preparation layer thickness.
  • FIG. 1 shows a circuit arrangement for evaluating the irregularly distributed charge accumulations, which are located on a material to be measured, for example a yarn or a thread. during the production process of yarn production or through friction points in the yarn production process.
  • An electrode arrangement 1 for example a latticed electrode arrangement according to FIG. 2 consisting of two intermeshing combs, is connected with its terminals to a charge amplifier, namely the first terminal 16 to a first charge amplifier 2 and the second terminal 17 to a second charge amplifier 3.
  • the outputs of the first charge amplifier 2 and of the second charge amplifier 3 are connected to the input of a differential amplifier 4.
  • the output of the differential amplifier 4 is connected via a converter 5 both to an AD converter 6 and to an analog signal tap 7.
  • the AD converter 6 is connected via a microcontroller 8 both to a serial interface 9 and to an operating and display unit 10.
  • the converter 5 can be, for example, an RMS converter, another averaging device, optionally with an adjustable averaging time, a peak rectifier with adjustable discharge time or a low-pass filter with adjustable cutoff frequency.
  • the converter 5 into the microcontroller 8 and replace it there by a digital filter, but in particular also by a non-linear calculation rule, such as, for example, the line integral known from mathematics.
  • a non-linear calculation rule such as, for example, the line integral known from mathematics.
  • the RMS converter From the AC voltage signal of the differential amplifier 4, the RMS converter generates a DC voltage signal whose residual ripple and thus the local resolution of the signal on the measurement item are determined inter alia by the averaging time of the RMS converter.
  • the construction of a control loop is possible, which online and autonomously change the order quantity of the preparation and thus contributes to quality assurance.
  • the analog Output signal of the converter 5 digitized by means of the AD converter 6 and supplied to the microcontroller 8.
  • the display of the measured value in the operating and display unit 10 and the output via the serial interface 9 are controlled by this microcontroller 8. This allows logging by reading directly or by a PC.
  • This digital data can also be used as the analog output signal of the converter 5 to build a control loop.
  • the microcontroller 8 also allows the parameterization of the system parameters, for example the averaging time, by the operator.
  • an electrode arrangement 1 comprising a combination of at least one signal electrode 11 interrupted in the yarn movement direction and at least one reference electrode 12 also interrupted in the yarn movement direction.
  • Both electrodes 11 and 12 have grid webs of different widths and spaces of different widths.
  • the signal electrode 11 for example, the different widths webs 14a and 14b and the reference electrode 12, the different widths interruptions 15a and 15b.
  • the longitudinal direction of both the signal electrode 11 and the reference electrode 12 is aligned parallel to the yarn 13.
  • the reference electrode 12 is disposed between the yarn 13 and the signal electrode 11 such that the lands 14a and 14b of the signal electrode 11 are associated with the interruption area 15a and 15b of the reference electrode 12.
  • the signal electrode 11 has at least two webs 14a and 14b and the reference electrode at least two interruptions 15a and 15b.
  • the yarn 13 is moved past the electrode assembly 1 and thus, due to the above-described shape and geometry of the grating, induces signals having a broadband spectrum according to the invention, which reflects the course of the preparation layer thickness along the yarn with high local resolution.
  • the reference electrode 12 When the reference electrode 12 is disposed between the yarn 13 and the signal electrode 11 and in such a manner that the lands 14a and 14b of the signal electrode 11 are associated with the junction area 15a and 15b of the reference electrode 12, the reference electrode 12 can serve also to the target a high SNR to shield interference fields with respect to the signal electrode 11.
  • the reference electrode 12 is connected via its terminal 16 not only to the input of the charge amplifier 2, but, as shown in Figure 2, additionally connected to ground potential.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Medicinal Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Food Science & Technology (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

L'invention a pour objet un procédé de régulation sans contact de l'épaisseur d'une couche de préparation appliquée sur un fil et un montage pour mettre en oeuvre le procédé, permettant à la fois de surveiller et éventuellement de commander l'application de préparation en direct et en continu pendant le processus de production de filage de fil continu au niveau de chaque filière, et de rééquiper des machines textiles pré-existantes. A cet effet, l'effet du champ est déterminé directement, sans détour lié à sa compensation, par l'intermédiaire de son influence électrostatique, une tension électrique proportionnelle à l'influence électrostatique est produite en fonction de ladite influence, et cette tension électrique est évaluée quant à son intensité et ses variations. L'invention concerne également un procédé de régulation sans contact de l'épaisseur d'une couche de préparation appliquée sur un fil et un montage pour mettre en oeuvre le procédé.
EP09748215A 2008-09-15 2009-09-14 Procédé de régulation sans contact de l'épaisseur d'une couche de préparation appliquée sur un fil, et montage pour mettre en oeuvre le procédé Withdrawn EP2331906A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200810047336 DE102008047336B4 (de) 2008-09-15 2008-09-15 Verfahren zur berührungslosen Kontrolle der Dicke einer auf ein Garn aufgebrachten Präparationsschicht und Schaltungsanordnung zur Durchführung des Verfahrens
PCT/DE2009/001302 WO2010028642A1 (fr) 2008-09-15 2009-09-14 Procédé de régulation sans contact de l'épaisseur d'une couche de préparation appliquée sur un fil, et montage pour mettre en oeuvre le procédé

Publications (1)

Publication Number Publication Date
EP2331906A1 true EP2331906A1 (fr) 2011-06-15

Family

ID=41649718

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09748215A Withdrawn EP2331906A1 (fr) 2008-09-15 2009-09-14 Procédé de régulation sans contact de l'épaisseur d'une couche de préparation appliquée sur un fil, et montage pour mettre en oeuvre le procédé

Country Status (3)

Country Link
EP (1) EP2331906A1 (fr)
DE (1) DE102008047336B4 (fr)
WO (1) WO2010028642A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2394944A1 (fr) * 2010-06-10 2011-12-14 Sentex Chemnitz GmbH Dispositif de capteur de poussière pour fils et peluches
BE1026822B1 (nl) * 2018-12-03 2020-07-02 Gilbos Nv Methode en sensor voor rotatiemeting

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH479478A (de) 1968-06-17 1969-10-15 Loepfe Ag Geb Verfahren und Vorrichtung zur Überwachung der Bewegung eines Textilfadens
US3927356A (en) 1973-07-13 1975-12-16 Nat Res Dev Yarn detection devices
DE9216181U1 (de) 1992-11-27 1993-02-18 Otto Stüber GmbH & Co KG, 73266 Bissingen Kapazitiver elektronischer Fadenwächter mit Dual-Elektroden
DE4408312C2 (de) * 1994-03-11 2002-11-28 Frei Gmbh & Co Geb Berührungsloser, elektrostatischer Aufnehmer für sich bewegende, längliche und elektrisch nichtleitende Objekte
DE19535177A1 (de) 1995-09-22 1997-03-27 Temco Textilmaschkomponent Verfahren und Vorrichtung zum Prüfen der Struktur, insbesondere Topografie, von Garnen insbesondere in einer Textilmaschine
WO2006133584A1 (fr) 2005-06-15 2006-12-21 Uster Technologies Ag Procede et dispositif pour detecter des matieres etrangeres dans un echantillon de controle allonge, solide et en deplacement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010028642A1 *

Also Published As

Publication number Publication date
DE102008047336B4 (de) 2010-05-12
WO2010028642A1 (fr) 2010-03-18
DE102008047336A1 (de) 2010-03-25

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