WO2017054097A1 - Procédé et dispositif pour contrôler un échantillon textile allongé - Google Patents

Procédé et dispositif pour contrôler un échantillon textile allongé Download PDF

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Publication number
WO2017054097A1
WO2017054097A1 PCT/CH2016/000118 CH2016000118W WO2017054097A1 WO 2017054097 A1 WO2017054097 A1 WO 2017054097A1 CH 2016000118 W CH2016000118 W CH 2016000118W WO 2017054097 A1 WO2017054097 A1 WO 2017054097A1
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WO
WIPO (PCT)
Prior art keywords
measurement
result
textile
gravimetric
capacitive
Prior art date
Application number
PCT/CH2016/000118
Other languages
German (de)
English (en)
Inventor
Peter Pirani
Original Assignee
Uster Technologies Ag
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 Uster Technologies Ag filed Critical Uster Technologies Ag
Publication of WO2017054097A1 publication Critical patent/WO2017054097A1/fr

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Classifications

    • 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 present invention is in the field of textile quality testing. It relates to a method and a device for testing elongated textile test material such as yarn, roving or sliver, according to the preamble of the corresponding independent claims. Moreover, the invention also relates to a compilation of textile data for a plurality of textile materials or material mixtures, according to the preamble of a further independent patent claim.
  • Devices for the capacitive examination of an elongate textile test material such as a yarn, a roving or sliver, are known. They contain a measuring gap through which the test material is moved in its longitudinal direction. The measuring gap is formed by two surfaces parallel to the test material and arranged on both sides of the test material, to which electrodes of a measuring capacitor are assigned. Due to measurements of the capacitance of the measuring capacitor statements about the in the
  • US-6,072,319 A discloses a capacitive device for measuring properties of a textile product in a measuring nip in which the textile product is introduced.
  • the device comprises a measuring circuit and a compensation circuit.
  • the latter can be used to compensate for disturbing influences such as moisture changes in the air in the measuring gap or unwanted mechanical changes in the measuring gap width.
  • the measuring circuit includes a measuring capacitor whose planar electrodes form the measuring gap for receiving the test material, and leads to the electrodes.
  • the compensation circuit includes an identically constructed one
  • a method and apparatus for determining levels of solids in a sample are disclosed in US 6,346,819 Bl.
  • the test material is exposed to an electric field and dielectric properties of the field with the test material are determined. From the dielectric properties of two electrical variables are determined and combined, creating a characteristic value that is independent of the mass of the test material. The characteristic value is compared with a previously determined characteristic value for the substances concerned and from this the proportion of solid substances is determined.
  • Yarn length per mass is measured a certain length of the yarn to be tested, separated from the rest of the yarn and weighed on a precision balance. The yarn mass is divided by the yarn length or vice versa. In the same way, the band number of a sliver or a roving can be determined.
  • Garnprüf Intel each with a capacitive measuring module and a module for
  • the invention proposes, in addition to the capacitive measurement to make a gravi metric measurement on the textile material to be tested and to link results of the two measurements computationally.
  • capacitive measurement is understood as meaning a measurement of a capacitance of a measuring capacitor influenced by the test material.
  • Grammetric measurement in this document means a measurement of a mass of the test material by determining its weight.
  • the method according to the invention is used to test elongate textile samples such as yarn, roving or sliver. A capacitive measurement and a gravimetric measurement are carried out on the textile test material. A result of the capacitive measurement and a
  • the result of the gravimetric measurement is computationally linked.
  • the result of the capacitive measurement preferably relates to a first one
  • Reference length and the result of the gravimetric measurement to a second reference length do not need to be the same.
  • the computational link includes a
  • the quotient formation preferably consists of the formation of a quotient of the result of the capacitive measurement and the result of
  • a result of the computational link is compared with a reference value. Because of the comparison of the result of the computational
  • Linking with the reference value is concluded on a material composition of the textile test material.
  • the reference value can be formed from at least one previous measurement on at least one textile test object.
  • the reference value is z. B. a
  • the invention also relates to a compilation of textile data for a plurality of textile materials or material mixtures. Any textile material or
  • Material mixture is associated with a reference value, which is a computational linkage of at least one result of a capacitive measurement and at least one result of a gravimetric measurement of the relevant textile material or material mixture.
  • the device according to the invention for testing elongated textile test material such as yarn, roving or sliver contains a capacitive measuring unit for carrying out a capacitive measurement on the textile test material, a gravimetric measuring unit for carrying out a gravimetric measurement on the textile test object and a device connected to the capacitive measuring unit and the gravimetric measuring unit Evaluation unit for the evaluation of measurement results.
  • the evaluation unit is to be calculated
  • the evaluation unit is set up to form a quotient of the result of the capacitive measurement and the result of the gravimetric measurement.
  • Figure 1 shows a Austiungsform an inventive device.
  • FIG. 2 shows in a bar chart results of gravimetric measurements on in each case five samples of three different types of belt.
  • FIG. 3 shows results of capacitive measurements in a bar chart
  • FIG. 4 shows, in a bar chart, quotients from the respective results of the capacitive and gravimetric measurements.
  • FIG. 5 shows in a histogram a frequency distribution of quotients fictitious
  • FIG. 1 shows an embodiment of a device 1 according to the invention. It includes a yarn testing device 2, which is known from US Pat. No. 5,025,660 A, for measuring a yarn 9.
  • the yarn testing device 2 can have various modules for measuring various properties of the yarn 9 include.
  • At least one module 21 is a capacitive module which is adapted to be capacitive
  • an average dielectric constant of the materials in a measurement capacitor is determined, which is a measure of a mass and a material composition of the gambling section located in the measurement capacitor.
  • the device 1 includes a gravimetric measuring device 3, for example a
  • Precision balance for a gravimetric measurement on the yarn 9.
  • a portion of the yarn 9 having a predetermined length in the yarn tester 2 is separated from the remainder of the yarn 9 and pneumatically required by a line 23 to the precision balance 3.
  • the yarn section is placed on a weighing plate 31 of the precision balance 3 and weighed. From the weight and the length of the yarn section, the mass per unit length of the yarn 9, d. H. the yarn count, be calculated.
  • a result mc of the capacitive measurement and a result of never the gravimetric measurement are sent to a computer 4, e.g. B. a workstation, transmitted for evaluation.
  • the evaluation includes a mathematical combination of the result mc of the capacitive measurement with the result mc of the gravimetric measurement.
  • ITIG refers to a specific reference length of the yarn 9; the reference length for the result mc of the capacitive measurement but the reference length for the result mc of the gravimetric measurement can be different.
  • the results mc, mc can be expressed in arbitrary units measured and indicated.
  • the computational link is a formation of the quotient mc / fflo.
  • a result of the computational linkage may be on a connected to the computer 4 output unit, for. B. a screen 41, are issued to an operator.
  • an alarm may be issued, e.g. B. also on the screen 4L
  • the reference value can be specified as a fixed value and / or calculated as an average value from previous measurements.
  • the said fixed value can be determined as an average of several measurements and recorded in a table as described below.
  • the textile test material is a yarn 9
  • the invention also relates to other elongated textile test items such as tape or roving.
  • Corresponding devices for the capacitive measurement of tapes or rovings are known. The evaluation need not be done in a stand-alone computer, but can be performed in a processor of the tester 2 or the gravimetric measuring device 3.
  • FIG. 2 shows, in a bar chart 200, results mo of gravimetric measurements on different bands.
  • five equally long samples of three different types of belt were weighed and from the respective weight of the mass mc; the sample is determined.
  • the mass ratio of polyester to cotton is 25:75 for the first belt type, 52:48 for the second belt type and 65:35 for the third belt type; the
  • Ratios are given below the figure 4 for the figures 2-4 together.
  • the column diagram 300 of Figure 3 shows results mc of capacitive measurements for the same bands as in Figure 2, in the same order. Again, variations in the measurement results within a band type are noted, which in turn are caused by band number variations.
  • FIG. 4 shows a bar chart 400 with the quotients mc / mc; from the respective results of the capacitive measurements and the gravimetric measurements.
  • a comparison with FIG. 3 illustrates two advantages of the mathematical combination of the results mc, mc. First, the variations within a band type are smaller, ie the signal-to-noise ratio is greater. Second, the three different types of bands are more clearly distinguishable.
  • the quotients mc / rnc and / or other mathematical combinations of at least one result mc of a capacitive measurement and at least one result ITIG of a gravimetric measurement can be used for various textile materials and textile
  • Materi al likes i can be held as reference values in a table.
  • a simple, emerged from the measurements according to Figures 2-4 table could, for. B. look like this:
  • Mass ratio of the measured textile 9 to be determined. Although such an absolute determination may not always be clear, reference values of certain materials or mixtures of materials are so close to each other that they are statistically indistinguishable. But even in such cases, the inventive method is of great benefit, because it at least on relative changes of
  • a collection of reference values may also be present in a form other than a table, e.g. B. as plain text or as a graphic.
  • the compilation can be electronic, z. B. as a database.
  • FIG. 5 shows in the form of a histogram 500 a frequency distribution of quotients mc / mG of fictitious results of measurements on a multiplicity of textile test items. Also plotted are calculated from it
  • Probability density functions 501, 502. Obviously, the measured textile samples belong to two different types of samples or samples, which can be confirmed by statistical methods known per se.
  • the material composition of the two samples Probably the first type of sample is a polyester / cotton mixture with a mass ratio of 52:48 and the second type of sample a polyester / cotton Mixture with one
  • Embodiments limited.
  • the formation of the quotient mc / mo is only one preferred example for the mathematical combination of the results of the capacitive measurement and the gravimetric measurement; other computational links are possible.
  • the skilled person will be able to derive further variants, which also belong to the subject of the present invention.

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

Abstract

L'invention concerne un dispositif (1) de contrôle d'un échantillon textile allongé (9), comprenant une unité de mesure capacitive (21) destinée à réaliser une mesure capacitive sur l'échantillon textile (9), une unité de mesure gravimétrique (3) destinée à réaliser une mesure gravimétrique sur l'échantillon textile (9) et une unité d'interprétation (4) reliée à l'unité de mesure capacitive (21) et à l'unité de mesure gravimétrique (3), destinée à interpréter les résultats des mesures. L'unité d'interprétation (4) est conçue pour combiner mathématiquement un résultat de la mesure capacitive et un résultat de la mesure gravimétrique. La combinaison mathématique permet d'obtenir des informations à propos de la composition matérielle de l'échantillon textile (9).
PCT/CH2016/000118 2015-09-28 2016-09-09 Procédé et dispositif pour contrôler un échantillon textile allongé WO2017054097A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1396/15 2015-09-28
CH13962015 2015-09-28

Publications (1)

Publication Number Publication Date
WO2017054097A1 true WO2017054097A1 (fr) 2017-04-06

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3402181A1 (de) 1983-12-14 1985-07-11 Zellweger Uster Ag, Uster Verfahren und vorrichtung zur automatischen bestimmung der mittleren feinheit und des variationskoeffizienten der feinheitsschwankungen von textilen und technischen garnen, vorgarnen und baendern
US5025660A (en) 1987-10-06 1991-06-25 Zellweger Uster Ag Apparatus and method for the automatic determination of the count of a textile test sample
WO1997032209A1 (fr) * 1996-02-26 1997-09-04 Zellweger Luwa Ag Procede et dispositif pour la determination des proprietes de resistance d'echantillons de produits textiles etires longitudinalement
US6072319A (en) 1997-12-19 2000-06-06 Zellweger Luwa Ag Device for measuring properties of a textile product
US6346819B1 (en) 1997-12-18 2002-02-12 Zellweger Luwa Ag Method and device for determining proportions of solid matter in a test material
WO2004063696A2 (fr) 2003-01-08 2004-07-29 Premier Evolvics Pvt. Ltd. Mesurer et tester un materiau textile allonge continu
WO2007140639A1 (fr) * 2006-06-07 2007-12-13 Uster Technologies Ag Procédé et dispositif de détection d'une âme dans un fil à âme

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3402181A1 (de) 1983-12-14 1985-07-11 Zellweger Uster Ag, Uster Verfahren und vorrichtung zur automatischen bestimmung der mittleren feinheit und des variationskoeffizienten der feinheitsschwankungen von textilen und technischen garnen, vorgarnen und baendern
US5025660A (en) 1987-10-06 1991-06-25 Zellweger Uster Ag Apparatus and method for the automatic determination of the count of a textile test sample
WO1997032209A1 (fr) * 1996-02-26 1997-09-04 Zellweger Luwa Ag Procede et dispositif pour la determination des proprietes de resistance d'echantillons de produits textiles etires longitudinalement
US6346819B1 (en) 1997-12-18 2002-02-12 Zellweger Luwa Ag Method and device for determining proportions of solid matter in a test material
US6072319A (en) 1997-12-19 2000-06-06 Zellweger Luwa Ag Device for measuring properties of a textile product
WO2004063696A2 (fr) 2003-01-08 2004-07-29 Premier Evolvics Pvt. Ltd. Mesurer et tester un materiau textile allonge continu
WO2007140639A1 (fr) * 2006-06-07 2007-12-13 Uster Technologies Ag Procédé et dispositif de détection d'une âme dans un fil à âme

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