EP0322430A1 - Verfahren und vorrichtung zur messung der drehung eines laufenden, langgestreckten prüfkörpers - Google Patents
Verfahren und vorrichtung zur messung der drehung eines laufenden, langgestreckten prüfkörpersInfo
- Publication number
- EP0322430A1 EP0322430A1 EP88905347A EP88905347A EP0322430A1 EP 0322430 A1 EP0322430 A1 EP 0322430A1 EP 88905347 A EP88905347 A EP 88905347A EP 88905347 A EP88905347 A EP 88905347A EP 0322430 A1 EP0322430 A1 EP 0322430A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- test specimen
- light
- photo receiver
- reflected
- test
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 17
- 238000011156 evaluation Methods 0.000 claims abstract description 5
- 108091008695 photoreceptors Proteins 0.000 claims abstract description 4
- 238000003384 imaging method Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000000737 periodic effect Effects 0.000 description 3
- 206010020112 Hirsutism Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
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
-
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/32—Counting, measuring, recording or registering devices
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/02—Machine details; Auxiliary devices
- D07B7/022—Measuring or adjusting the lay or torque in the rope
-
- 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
Definitions
- the invention relates to a method for measuring the rotation of a running, elongate test specimen, such as a yarn or a wire rope, by optical scanning of its surface and analysis of the scanning signal obtained in the process.
- the invention is now to provide a method of the type mentioned at the outset for measuring the twist of yarns.
- This object is achieved according to the invention in that the test specimen is illuminated by at least one light source and the light reflected by the test specimen is imaged on a diaphragm and measured by at least one photo receiver, the output signal of which is examined for periodicities caused by irregularities contained in the test specimen, and that the rotation is derived from the wavelength or the frequency of these periodicities.
- the invention is therefore based on the new finding that the rotation of yarns and the like leads to the integration of irregularities which occur periodically because of the rotation. If the surface of a running test specimen is examined for such periodicities, then the rotation can be determined from these, which would not be possible with a simple scanning of the yarn profile.
- the invention further relates to a device for carrying out the method according to the invention.
- This is characterized by at least one light source for illuminating the test specimen, an aperture, optics for imaging the light reflected by the specimen onto this aperture, at least one photo receiver arranged in the beam path after the aperture and an evaluation unit assigned to it.
- FIGS. 2, 3 show diagrams for the explanation of the function.
- 1 shows a piece of a yarn G, which is conveyed in the direction of arrow P by a device for measuring the yarn twist by means of guide and transport means (not shown).
- this measuring device contains two light sources 1, 1 'for illuminating the yarn G, each with a bundle of rays L, L', an aperture 2, on which the ray bundle R reflected by the yarn is imaged, one arranged in the beam path after the aperture Photo-receiver 3 and an evaluation unit 4 assigned to it.
- a corresponding optical system 5, 5 r or 6 is provided in each of the beam paths of the two beam bundles L, L 'and the reflected beam bundle R.
- Another lens 7 is located between the aperture 2 and the photoreceiver 3.
- the light sources 1, 1 ' are preferably formed by light-emitting diodes, so-called LEDs.
- each twine G or each wire rope or each rope and the like and because of the twist has certain irregularities with respect to its cross section, and in particular deviations from the cross-sectional shape. These characteristic deviations occur periodically, the distance between two successive such irregularities, or in other words the length of their period, being a direct measure of the rotation. Because over such a period, the yarn is just rotated through 360 °.
- the yarn G is illuminated at a flat angle to its longitudinal axis, then the irregularities mentioned become light or dark Places clearly visible, as indicated by the hatched areas B in FIG. 2.
- the length of the period, or in other words, the wavelength of the irregularities, is denoted by d.
- Typical values for T are, for example, between 300 and T500 turns per meter.
- the brightness of the incident light beam R then periodically increases on the photoreceptor 3 (FIG. 1), and when the output signal of the photoreceptor 3 is evaluated in the evaluation unit 4 by Fourier transformation (FFT) or autocorrelation, a clearly recognizable maximum is obtained mum at the period of irregularities.
- FFT Fourier transformation
- autocorrelation autocorrelation
- the angle of incidence a of the beam L is relatively flat and lies between 5 ° and 40 °, preferably 5 °, and the angle of incidence a 'of the beam L' is steeper and lies between 60 ° and 85 °, preferably 85 °.
- a single common photo receiver 3 can be used, in which the signal component originating from the light source 1 divides by that originating from the light source 1 1 becomes. But you can also use two light sources 1, 1 'that emit light of different wavelengths. In this case, the reflected beam R must be divided on the receiver side and the individual components originating from the two light sources 1, 1 'must be distributed to two different photo receivers using appropriate filters.
- a further lighting variant consists in using two light sources 1 with a flat and one light source with a very steep angle of incidence of up to about 90 °, the two light sources 1 being arranged symmetrically on both sides of the reflected beam R and referring to FIG. 1 third light source lies between the other two.
- this arrangement leads to an even better emphasis on periodic Structures and on the other hand for eliminating interfering influences, for example from nits and the like.
- the aperture 2 If the yarn T has twists per unit length and is mapped onto the aperture 2 on the imaging scale K: 1, the aperture 2 must be narrower in the longitudinal direction of the yarn than K / T so that periodic portions of the Can still capture rotation well.
- the diaphragm 2 In the transverse dimension, in the case of yarns, the diaphragm 2 is advantageously limited to the approximate detection of the yarn body, so that the hairiness does not have a disruptive effect.
- the yarn G can be singed to further reduce the interferences of hairiness. If the yarn G is singed very strongly, one can get an insight into the twist in the yarn body, which on the one hand can be very desirable for rotor yarns, but on the other hand is destructive and should therefore be limited to random samples.
- test specimen G should be guided as free of vibrations as possible, since vibrations have a disruptive effect when the light falls flat. For this reason, it is advantageous to guide the test specimen G directly at the measuring point via a deflection element.
- the measuring device described can be made very compact and is therefore extremely suitable for use as a measuring module in a device for the automatic determination of nominal sizes of textile test specimens, as described, for example, in Swiss Patent Application No. 02823 / 86-2 and is known under the name USTER TESTER (USTER - registered trademark of Zellweger Uster AG).
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Food Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Quality & Reliability (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Treatment Of Fiber Materials (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2565/87 | 1987-07-06 | ||
CH2565/87A CH675133A5 (ja) | 1987-07-06 | 1987-07-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0322430A1 true EP0322430A1 (de) | 1989-07-05 |
Family
ID=4236666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88905347A Withdrawn EP0322430A1 (de) | 1987-07-06 | 1988-06-29 | Verfahren und vorrichtung zur messung der drehung eines laufenden, langgestreckten prüfkörpers |
Country Status (5)
Country | Link |
---|---|
US (1) | US5030841A (ja) |
EP (1) | EP0322430A1 (ja) |
JP (1) | JPH02500117A (ja) |
CH (1) | CH675133A5 (ja) |
WO (1) | WO1989000215A1 (ja) |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH678230A5 (ja) * | 1989-06-06 | 1991-08-15 | Peyer Ag Siegfried | |
FR2657959B1 (fr) * | 1990-02-06 | 1992-04-30 | Superba Sa | Procede et dispositif pour mesurer la torsion d'un fil textile. |
JPH05256612A (ja) * | 1991-04-05 | 1993-10-05 | Bridgestone Corp | コード入り帯状部材のコード角度及びピッチの検出方法および装置 |
DE4212467C2 (de) * | 1992-04-14 | 1996-01-25 | Palitex Project Co Gmbh | Verfahren und Vorrichtung zum Erfassen von Längenungleichmäßigkeiten der einzelnen Garnkomponenten eines Zwirns |
US5671061A (en) * | 1992-06-18 | 1997-09-23 | Zellweger Luwa Ag | Method and apparatus for assessing the effect of yarn faults on woven or knitted fabrics |
DE59409818D1 (de) | 1993-03-31 | 2001-09-13 | Zellweger Luwa Ag Uster | Verfahren und Vorrichtung zur Bestimmung der Struktur von Garnen im Bereich ihrer Oberfläche |
CH685071A5 (de) * | 1993-04-02 | 1995-03-15 | Zellweger Uster Ag | Verfahren und Vorrichtung zur Bestimmung der Struktur von Garnen im Bereich ihrer Oberfläche. |
FR2713246B1 (fr) * | 1993-11-29 | 1996-03-29 | Yves Michnik | Dispositif de contrôle auto-réactif pour effectuer un tressage, rubannage ou autre en très haute précision. |
JPH08254504A (ja) * | 1994-11-29 | 1996-10-01 | Zellweger Luwa Ag | 伸長された物体の特性を記録するための方法と装置 |
DE29505300U1 (de) * | 1995-03-29 | 1996-08-01 | Saurer-Allma Gmbh, 87437 Kempten | Einrichtung zur Ermittlung von Zwirnparametern an einer Zwirnmaschine, insbesondere einer Kabliermaschine |
DE19525260A1 (de) * | 1995-07-11 | 1997-01-16 | Iro Ab | Optoelektronische Steuervorrichtung und Schußfaden-Meßspeichergerät |
JP3546914B2 (ja) * | 1996-10-18 | 2004-07-28 | 富士ゼロックス株式会社 | 光学測定方法、光学測定装置および画像形成装置 |
DE59805401D1 (de) * | 1997-12-17 | 2002-10-10 | Zellweger Luwa Ag Uster | Vorrichtung zur Ueberwachung von Garnen an Ringspinnmaschinen |
EP0927887A1 (de) * | 1997-12-17 | 1999-07-07 | Zellweger Luwa Ag | Verfahren zur Erkennung periodischer Fehler in einem längsbewegten Prüfgut |
JP2002540380A (ja) * | 1998-02-21 | 2002-11-26 | ウィッシス・テクノロジー・ファウンデーション・インコーポレイテッド | 一次元の化学化合物アレイ及びそれらのアセイ方法 |
FI110340B (fi) * | 1999-02-04 | 2002-12-31 | Metso Paper Automation Oy | Menetelmä ja laite liikkuvan rainan muodonmuutoksen identifioimiseksi |
GB2353857B (en) * | 1999-09-01 | 2004-02-04 | Beta Lasermike Ltd | Apparatus and methods of detecting and controlling twists in multicore cables |
US7244572B1 (en) | 2000-03-24 | 2007-07-17 | Wisys Technology Foundation, Inc. | One-dimensional arrays on optical fibers |
US6879759B2 (en) * | 2001-01-08 | 2005-04-12 | Alcatel | Apparatus and method for on-line binder laylength measurement and adjustment |
US6728453B2 (en) * | 2001-06-27 | 2004-04-27 | Pirelli Communications Cables And Systems Usa, Llc | Method of determining lay length of S-Z stranded buffer tubes in optical fiber cable during manufacturing |
US7634372B2 (en) * | 2001-09-11 | 2009-12-15 | Prysmian Cavi E Sistemi Energia S.R.L. | Method and apparatus for monitoring cable stranding |
US7433535B2 (en) * | 2003-09-30 | 2008-10-07 | Hewlett-Packard Development Company, L.P. | Enhancing text-like edges in digital images |
WO2006122722A1 (de) * | 2005-05-14 | 2006-11-23 | Oerlikon Textile Gmbh & Co. Kg | Verfahren und vorrichtung zur simulation eines visuellen flächenmusters eines faserproduktes sowie verfahren und vorrichtung zur herstellung eines bcf-garnes |
US20070115460A1 (en) * | 2005-11-21 | 2007-05-24 | Capaldo Kevin P | Method for examining molds and apparatus for accomplishing the same |
US20080151261A1 (en) * | 2006-12-20 | 2008-06-26 | Jon Jacob Kaminer | Process and apparatus for online detection of surface irregularity in threadlines |
CN101806749B (zh) * | 2010-04-09 | 2011-11-23 | 东华大学 | 一种用于纺织品中纤维组成含量分析的装置及方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1560540A1 (de) * | 1963-07-04 | 1970-06-25 | Reiners Walter Dr Ing | Vorrichtung zur UEberwachung laufender Faeden |
ES360019A1 (es) * | 1968-01-20 | 1970-06-16 | Reiners | Dispositivo para el control fotoelectrico de material fili-forme. |
IT1003622B (it) * | 1973-03-30 | 1976-06-10 | Ludwigsburger Masch Bau | Attrezzo per lavorare su pezzi mec canici superfici cilindriche di forma trocoidale |
DE3628654A1 (de) * | 1986-08-23 | 1988-03-03 | Palitex Project Co Gmbh | Verfahren zur bestimmung der drehung eines zwirns |
JP2910336B2 (ja) * | 1991-07-24 | 1999-06-23 | 株式会社日立製作所 | 加入者回線管理方式 |
-
1987
- 1987-07-06 CH CH2565/87A patent/CH675133A5/de not_active IP Right Cessation
-
1988
- 1988-06-29 JP JP63505035A patent/JPH02500117A/ja active Pending
- 1988-06-29 EP EP88905347A patent/EP0322430A1/de not_active Withdrawn
- 1988-06-29 WO PCT/CH1988/000116 patent/WO1989000215A1/de not_active Application Discontinuation
- 1988-06-29 US US07/337,521 patent/US5030841A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8900215A1 * |
Also Published As
Publication number | Publication date |
---|---|
US5030841A (en) | 1991-07-09 |
JPH02500117A (ja) | 1990-01-18 |
CH675133A5 (ja) | 1990-08-31 |
WO1989000215A1 (en) | 1989-01-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
|
17P | Request for examination filed |
Effective date: 19890202 |
|
17Q | First examination report despatched |
Effective date: 19910213 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19911217 |