GB2064106A - Determining the diameter or cross section of threads - Google Patents
Determining the diameter or cross section of threads Download PDFInfo
- Publication number
- GB2064106A GB2064106A GB8032472A GB8032472A GB2064106A GB 2064106 A GB2064106 A GB 2064106A GB 8032472 A GB8032472 A GB 8032472A GB 8032472 A GB8032472 A GB 8032472A GB 2064106 A GB2064106 A GB 2064106A
- Authority
- GB
- United Kingdom
- Prior art keywords
- recording device
- thread
- filamentary
- light source
- cross
- 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.)
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- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 claims abstract description 11
- 238000005286 illumination Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 21
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 description 35
- 238000012360 testing method Methods 0.000 description 32
- 230000003287 optical effect Effects 0.000 description 10
- 238000005259 measurement Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 241000826860 Trapezium Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/30—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces
- G01B11/303—Measuring arrangements characterised by the use of optical techniques for measuring roughness or irregularity of surfaces using photoelectric detection means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/08—Measuring arrangements characterised by the use of optical techniques for measuring diameters
- G01B11/10—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving
- G01B11/105—Measuring arrangements characterised by the use of optical techniques for measuring diameters of objects while moving using photoelectric detection means
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Textile Engineering (AREA)
- General 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)
- Immunology (AREA)
- Pathology (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
To determine its diameter or cross-section, a thread 11 is caused to travel between a light source 10 and a receiving device 13. The illumination of the device 13 is measured by the shadow (as shown) or reflection of the thread 11. The device 13 has a series of individual photo sensors which are scanned to produce a representation of the diameter or cross-sectional image in the form of a pulse sequence, avoiding the need for an analog digital converter. For non-circular cross- sections a two-beam system is used (Fig. 4 not shown). By use of suitable pulse thresholds the roughness of the surface is measured. Also the thread position or the presence of protruding bristles may be detected. <IMAGE>
Description
SPECIFICATION
A method of, and apparatus for, determining the diameter or cross section of thread-like or filamentary bodies
This invention relates to the determination of the diameter or cross-section of thread-like or filamentary bodies. The invention is for example, applicable to measuring devices of yarn cleaners, to measuring devices for the metrological recording of the surface characteristics of all kinds of materials or as sensors for thread run stop motions.
It is known to examine the diameter or cross section of a yarn by moving the yarn through a transducer which continuously scans the diameter or cross sectional values and forms from them an electrical signal which is suitable for further evaluation. Various transducer systems are used, for example, optical, capacitive or pneumatic systems. Each of these systems has specific advantages and disadvantages and the particular system used is selected according to the object which is desired.
The optical systems are generally based on the shadow or reflex formation of the material being tested which is illuminated by a light source. An analog signal which is proportional to the diameter of the test material is generally obtained and is subjected to further evaluation. It is even possible to measure with adequate precision nonround (oval, small band-shaped) cross sections if particular measures are taken, for example, by projecting the yarn contours on a light-sensitive member from more than one direction.
A major disadvantage of the known technology of optical cross-section scanning is that the signal which is proportional to the diameter or cross section is represented as the difference of the illumination strength between the undisturbed optical arrangement and the optical path of the light which is influenced by the test material.
While the fluctuations in the signal caused by a change in the light strength of the light source (fluctuations in the supply voltage, ageing, blurring etc) may, for example, be compensated by connection means, the measured signal is also influenced when the light-sensitive element is covered with grime and dust. The development of dust is extremely heavy, particularly when textile materials are measured, and if no particular precautions are taken to keep the exposed measuring field clear of impurities the optical measuring system will, after a short time, produce false analog measured values. It is, therefore, necessary to clean the optical system periodically but this impedes its use particularly where it is either not easily accessible or when it has to have a determined serviceable life in operational measuring technology, during which time maintenance is impossible.
Colour sensitivity is also a disturbing factor in the traditional optical measuring methods. A black yarn produces a darker shadow and a lighter reflection than a white yarn. This leads to false measurements in the traditional methods. In contrast, the method of this invention reacts to the exposed individual elements. Thus, the exposure strength is not essential since the determination of the measured values may merely be geared to the contrast between exposed and unexposed individual elements. The method of this invention is also insensitive to changes in the surrounding light.
Recent progress in micro-electronics has led to the introduction of components which make it possible for a person skilled in measuring and control technology to overcome problems which could previously only be solved with great difficulty to be solved in a simple and stylish manner. One such component is a recording device, for example, produced by Philips entitled
P2CCD 500 B (= profiled peristaltic CCD). This device contains a hundred photo sensors with relevant connection and storage means in a width of only 7.5 mm. With this device an exposure path over the recording surface may be scanned sequentially and may be read into a shift register.
Recording devices of this were type were originally designed for line-shaped image analysis, for example, for scanning films, facsimile devices and the like.
The present invention uses such recording devices to determine the diameter or cross section of thread-like or filamentary bodies which are exposed to at least one light source, the exposure condition caused by these bodies being received by means of at least one recording device.
The essential difference between the method of the present invention and known practice is that the exposure condition produced by the test material, for example its shadow figure thrown on a light-sensitive plane, no longer produces an analog measured signal as an entirety, but that this shadow figure is scanned point-wise over the width of the recording device, i.e. that each of the previously mentioned five hundred photo sensors is sequentially examined as to which exposure condition it is exposed. Consequently, this produces a pulse sequence for each scanning cycle.The diameter or cross section of the test material is therefore continuously transformed into a larger number of pulses arranged in a series, whereby the number, and optionally also the height of the individual, pulses is a representation of the diameter whereas by the conventional methods, only the total of all shadow-forming components of the test material can be recorded as an analog signal.This transformation of the cross section of the test material now permits a substantially sophisticated analysis, in that for example:
(a) the number of darkened elements represents an absolute measurement for the diameter of the test material which vary as a result of ageing, temperature and other influences;
(b) distances of the individual elements of the recording device may be exactly reproduced in fractions of a micrometer and thus a constant absolute measuring precision is achieved from one unit to another;
(c) both the core zone as well as the peripheral zones of the test material may be measured. This enables a statement to be made concerning the surface structure (nappiness, roughness) of the thread-like or filamentary body.However, it is also possible, when measuring polyfilaments, to establish whether there are any bristling fibrils which indicate damage in the filament;
(d) a possible soiling of the recording device, particularly in its peripheral zones, may easily be recognised in the pulse sequence since it remains constant for each scanning cycle and thus may be eliminated according to the nature of a fixed sign suppression;
(e) possible transverse movements of the test material to the running direction may be recognised as such.
The arrangement of the light sources and recording devices, and also the type of illumination of the testing material may be effected according to known principles. The light source may have a punctiform design and throw the shadows of the test material on the recording device. However, it may also throw an at least approximately parallel beam on to the test material by means of a lens, and the shadow of the test material on the recording device. Thus, it is an advantage to achieve a delimination which is as sharp as possible between the light and shadow to particularly be able to sharply portray the peripheral zones of the test material.
Another arrangement makes use of the reflection characteristics of the test material. In this arrangement, the light source and recording device are positioned on the same side of the test material. The illuminated object is portrayed on the recording device by means of a lens.
The optical diameter or cross-sectional measurement must naturally be restricted to scanning the contours of the test material since the light and shadow distribution on the reception member does not give rise to any depth action.
Thus, a non-round (oval, band-shaped) crosssection will produce different values depending on whether the short or long axis of the test material is projected. It is, therefore, also advantageous to portray the test material from different directions at the same time or in an alternating manner, as a result of which at least both axial directions contribute to the cross section measurement.
The image of the test material on the recording device, whether produced by a shadow formation or by reflection, will constantly have a slightly unclear peripheral zone since neither is that any ideally punctiform light source available, nor can a certain diffraction of the light beams in the test material be avoided. Thus, the pulse sequence which is delivered by the recording device will not have an ideal rectangular path, but a trapezoidal path with more or less steep sides. By choosing a threshold value above which a pulse is considered as a contribution belonging to the image of the test material this vagueness of the optical system may be overcome.
Some embodiments of the invention will now be described with reference to the accompanying drawings in which;
Figure 1 schematically illustrates the principle of a punctiform light source with a recording device,
Figure 2 schematically illustrates the principle of a flat light source with a recording device,
Figure 3 schematically illustrates an arrangement for using the reflection of the test material,
Figure 4 schematically illustrates the determination of cross-section from more than one direction,
Figure 5 illustrates the principle of the test material image with a smooth body and
Figure 6 illustrates the resulting pulse image,
Figure 7 illustrates the principle of the test material image with a rough body and
Figure 8 illustrates the corresponding pulse image,
Figure 9 illustrates the principle of the test material image with a recording device which is partially covered with grime, and
Figure 10 shows the corresponding pulse image,
Figure 11 shows the pulse image with a threshold.
In the arrangement illustrated in Figure 1, a point light source 10 throws beams on a threadlike or filamentary body 11. A recording device 13, (for example a Philips P2 CCD 500 B) is positioned behind the body 1 The output signal of the recording device 13 are supplied to an evaluating device 14 where the pulse sequence is further processed digitally in a known manner, and is particularly transformed into values representing the diameter or cross section of the body 11.
Figure 2 illustrates a similar arrangement, whereby however an at least approximately parallel beam is thrown on the body 11 by the lens 1 2a. The recording device 13 and evaluating device 14 correspond to those in Figure 1.
Figure 3 illustrates an arrangement to determine the diameter by means of reflected light. In this arrangement, the light source 10 and the recording device 1 3 are positioned on the same side of the body 1 The lens 12 portrays the illuminated test material on the recording device 13.
Figure 4 illustrates the known principle of multiple exposure from different directions. In this case, two point light sources 10, 20 are positioned at an angle 22 and the recording device 13 is opposite the body 11. Instead of using two light sources 10, 20 an individual point light source 10 and a beam-dividing lens may also be provided which produces the light beams crossing in the body 11. The evaluating device 1 5 which is used in this case is to be performed according to the multiple signal sequence.
The beams are deflected by a mirror 23 such that they impinge on a recording device.
Arrangements comprising several recording devices are also possible.
Figure 5 shows a light source 10, the body 11 and the recording device 13 with the shadow 1 6 thrown by the body 11. It is assumed that the body 11 has a smooth surface. The pulse sequence produced by the recording device 13 is portrayed in Figure 6 as an approximately rectangular curve trait 31.
If, as illustrated in Figure 7, a rough or napped body 11 is brought into the measuring field, which body optionally also has bristling individual fibres 18, blurred shadows 1 7 or 1 9 are produced. The corresponding pulse sequence illustrated in Figure 8 shows a trapezoidal path 32, and the individual fibre 1 8 may be recognized as an isolated pulse 33.
Figure 9 shows a condition of the recording device 1 3 in which peripheral zones 21 of the light-sensitive part are covered with dust or other impurities. It is assumed that the body 11 moves approximately in the centre of the light-sensitive part and thereby causes a lasting cleaning of the surface which, as a result of the unavoidable vibration of the body 11, is constantly wider than the body itself or its shadow 1 6. According to
Figure 10, the resulting pulse image shows two zones 34, 35 which are produced by the reduced exposure of the dusted-over parts of the recording device 13 and shows the actual trapezium 31 produced by the shadow 1 6 of the body.As the zones 34, 35 are continuously exposed to the same slight extent or their exposure only changes slowly, means may be provided in the evaluating device 14 which eliminate such constant pulse sequences as not belonging to the measuring sequence.
Finally, Figure 11 shows a pulse trait 31 as is produced by one of the recording devices 13, having individual pulse values 36, 37. The decision whether a pulse value 36, 37 or the pulse trait 31 forms a measured value for the diameter or cross section measurement, is made by choosing a threshold value 40. This must be reached or exceeded by each pulse value if it is to be considered as a contributory factor to the total measured value.
It is also possible to design the threshold 40 in a variable manner, that is, either by positioning it as a whole higher or lower, or by providing another threshold for each pulse. In this way, an adaptation to possibly differing illumination strengths of the individual elements or the intensity of the light source is possible.
The present method and the apparatus of the present invention may be used in many ways, both for determining the diameter or cross section of thread-like or filamentary bodies, as well as in other uses where the cross section itself is not only the determining magnitude. While this is the case in, for example, yarn cleaners, the above mentioned characteristic, that namely the peripheral zones of the testing material may be recognised, may be used to provide measuring apparatus in which the surface structure of the test material is expressed. These are for example devices to measure the roughness or nappiness of a thread-like body, or devices which respond to the presence of bristling fibrils which may be particularly significant when processing polyfilaments.
Another evaluation possibility of the present method is that it is unimportant which part of the recording device is shadowed by the test material or exposed. The test material may therefore also be moved in front of the surface of the recording device transversely to its longitudinal direction.
The pulse traits will therefore be portrayed respectively at another point of the transducer surface, but will always have substantially the same path. Accordingly, devices may be provided which respond to such transverse movements of the test material, i.e. for example thread run stopmotions.
Claims (20)
1. A method of determining the diameter or cross-section of thread-like or filamentary bodies, in which the bodies are illuminated by at least one light source and the condition of exposure caused by the bodies is received by at least one recording device having photo sensors of the recording device which are individually scanned wherein the local illumination condition established by each photosensor is examined to ascertain whether it has reached or exceeded a given threshold value and signals produced by the photo sensors, in which such a threshold value is reached or exceeded, are transformed in an evaluating device into measured values for the diameter or cross section of the body.
2. A method according to claim 1, wherein the thread-like or filamentary body travels in a beam path between the light source and recording device and the shadow of the body is thrown on the recording device, a part of the photo sensors remaining unexposed.
3. A method according to claim 1, wherein the light source illuminates the thread-like or filamentary body and this is portrayed on the recording device.
4. A method according to claims 1 and 2 or 1 and 3, wherein the light source is a punctiform source.
5. A method according to claims 1 and 2 or 1 and 3, wherein the light source is an at least approximately parallel beam.
6. A method according to claim 1, wherein the thread-like or filamentary body travels directly in front of the recording device such that the surface of the recording device is at least partly kept clear of impurities.
7. A method according to claim 1, wherein a pulse sequence is obtained from sequential scanning of the photo sensors, from which pulse sequence the core zone and the peripheral zone of the thread-like or filamentary body may be recognised.
8. A method according to claim 1, wherein the evaluating device for the signals of the photo sensors respond to the fact that the illumination conditions between consecutive scanning cycles influence respectively different but substantially neighbouring photo sensors.
9. A method according to claims 1 to 8, wherein the thread-like or filamentary body is exposed from at least two directions and the changes in the exposure conditions which it causes are received by at least one recording device.
10. A method according to claim 9, wherein the pulse sequences produced by at least two images are recorded as a result of which a measured value is obtained which corresponds to the actual cross section of the thread-like or filamentary body.
11. A method according to claims 1 to 10, wherein the number of all the photo sensors whose signals reach or exceed a given threshold value, are considered when determining the diameter or cross section of the thread-like or filamentary body.
12. An apparatus for carrying out the method claimed in claim 1, comprising a light source and a recording device, means for causing a threadlike or filamentary body positioned to travel in the region of the recording device thereby to control the quantity of light falling on the recording device.
13. An apparatus according to claim 12, arranged so that the thread-like or filamentary body can travel in the beam path between the light source and the recording device.
14. An apparatus according to claim 12, arranged so that the thread-like or filamentary body reflects light falling in from the light source in the direction of a lens.
1 5. An apparatus according to claims 12 to 14, arranged so that the thread-like or filamentary body travel in front of the recording device in such a manner that it at least partly contacts the surface of the recording device.
1 6. An apparatus according to claim 12, comprising a lens arranged to portray the threadlike or filamentary body on the recording device.
17. An apparatus according to claim 12, comprising a lens arranged to an at least substantially parallel beam on the thread-like or filamentary body.
18. An apparatus according to claims 12 to 17, comprising a pair of light sources arranged at an angle to each other.
19. An apparatus for determining the diameter of cross-section of thread-like or filamentary bodies substantially as described with reference to the accompanying drawings.
20. A method of determining the diameter or cross-section of thread-like filamentary bodies substantially as described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1032679A CH643060A5 (en) | 1979-11-20 | 1979-11-20 | METHOD FOR DETERMINING THE DIAMETER OR THE SECTION OF A THREAD OR WIRE-SHAPED BODY, DEVICE FOR IMPLEMENTING THE METHOD, AND APPLICATION OF THE METHOD. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2064106A true GB2064106A (en) | 1981-06-10 |
Family
ID=4362002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8032472A Withdrawn GB2064106A (en) | 1979-11-20 | 1980-10-08 | Determining the diameter or cross section of threads |
Country Status (2)
| Country | Link |
|---|---|
| CH (1) | CH643060A5 (en) |
| GB (1) | GB2064106A (en) |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0073879A2 (en) * | 1981-08-26 | 1983-03-16 | Zellweger Uster Ag | Titercontrol device on spin cables from chemical fibres |
| EP0100412A2 (en) * | 1982-07-02 | 1984-02-15 | American Cyanamid Company | Suture inspection and gauging system |
| GB2144536A (en) * | 1983-08-04 | 1985-03-06 | Nanometrics Inc | Optical dimension measuring system |
| EP0182660A2 (en) * | 1984-11-21 | 1986-05-28 | E.I. Du Pont De Nemours And Company | Light-scattering method for measuring average cross-sectional shape parameters of a yarn |
| GB2215835B (en) * | 1988-02-05 | 1992-01-29 | Truetzschler Gmbh & Co Kg | Sliver thickness measurement. |
| US5167150A (en) * | 1989-01-04 | 1992-12-01 | Zellweger Uster, Inc. | Apparatus and methods for testing tension-elongation or cross-sectional properties of single fibers and multiple fiber bundles |
| US5203206A (en) * | 1989-01-04 | 1993-04-20 | Zellweger Uster, Inc. | Apparatus and methods for testing tension-elongation or cross-sectional properties of single fibers and multiple fiber bundles |
| WO1993019359A1 (en) * | 1992-03-17 | 1993-09-30 | Zellweger Uster Ag | Process and device for detecting impurities in a textile test sample |
| US5270787A (en) * | 1990-03-14 | 1993-12-14 | Zellweger Uster Inc. | Electro-optical methods and apparatus for high speed, multivariate measurement of individual entities in fiber or other samples |
| US5291024A (en) * | 1991-06-17 | 1994-03-01 | International Trading S.R.L. | Method for determining the position and shape of a yarn fed to a textile machine |
| US5430301A (en) * | 1990-03-14 | 1995-07-04 | Zellweger Uster, Inc. | Apparatus and methods for measurement and classification of generalized neplike entities in fiber samples |
| US5469253A (en) * | 1990-03-14 | 1995-11-21 | Zellweger Uster, Inc. | Apparatus and method for testing multiple characteristics of single textile sample with automatic feed |
| EP0627623A3 (en) * | 1993-03-31 | 1997-03-05 | Luwa Ag Zellweger | Method and apparatus for determining the surface structure of yarns. |
| WO1999036746A1 (en) * | 1998-01-14 | 1999-07-22 | Rieter Elitex A.S. | A method of determining the thickness and/or the homogeneity of a moving linear textile formation and a device for carrying out the method |
| EP1028305A2 (en) * | 1999-02-12 | 2000-08-16 | W. SCHLAFHORST AG & CO. | Procedure and device to determine at least one parameter of a wirelike object |
| WO2002037054A1 (en) * | 2000-11-02 | 2002-05-10 | Rieter Cz, A.S. | Method and device for contactless measurement of a linear textile formation such as yarn etc. |
| EP1265051A2 (en) * | 2001-06-07 | 2002-12-11 | Rieter CZ a.s. | A method of monitoring a moving linear textile formation and a device for carrying out the method |
| US6659386B1 (en) | 1998-12-17 | 2003-12-09 | W. Schlafhorst Ag & Co. | Method and apparatus for contactless yarn monitoring in a spinning or bobbin winding machine |
| EP1408332A1 (en) * | 2002-10-08 | 2004-04-14 | Rieter CZ a.s. | A device for monitoring a moving linear textile formation, in particular a yarn |
| US7333202B2 (en) | 2004-11-06 | 2008-02-19 | Oerlikon Textile Gmbh & Co. Kg | Yarn sensor |
| US20150022813A1 (en) * | 2013-07-16 | 2015-01-22 | Rieter Cz S.R.O. | CMOS Optical Detector Comprising Plurality of Optical Elements for Device for Monitoring Parameters of Moving Yarn on Textile Machines |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3718780A1 (en) * | 1987-06-04 | 1988-12-22 | Karl F Zimmer Kg | Optoelectronic measuring device for measuring the exterior edges of a device under test |
| WO1998008079A1 (en) * | 1996-08-20 | 1998-02-26 | Zellweger Luwa Ag | Device for optical capture of a parameter of a longitudinally moving thread-shaped body |
| DE19830395A1 (en) * | 1998-07-08 | 2000-01-13 | Schlafhorst & Co W | Process for the contactless measurement of strand-like fiber material |
| DE10060227A1 (en) * | 2000-12-04 | 2002-06-13 | Truetzschler Gmbh & Co Kg | Device at the exit of a line for the detection of the fiber material |
| FR2866950B1 (en) * | 2004-03-01 | 2006-07-07 | Fil Control | METHOD FOR NON-CONTACT MEASUREMENT OF THE DIAMETER OF A WIRE AND DEVICE FOR IMPLEMENTING SAID METHOD |
| CZ304758B6 (en) * | 2013-07-16 | 2014-09-24 | Rieter Cz S.R.O. | Method of monitoring quality of yarn by yarn cleaner and sensor for making the same |
| CZ2013567A3 (en) * | 2013-07-16 | 2014-08-27 | Rieter Cz S.R.O. | Monitoring method of at least one quality parameter of yarn and/or sensor parameters by a yarn electronic cleaner n l |
| US10605798B2 (en) | 2017-12-26 | 2020-03-31 | Petr PERNER | Method and device for optical yarn quality monitoring |
| CN115516146A (en) * | 2020-05-06 | 2022-12-23 | 立达Cz有限公司 | Method for detecting structural defects of a wrapped yarn comprising cores from parallel fibres bound together by wrapping fibres and wild fibres, a device for performing the method, a computer program for the device and a computer readable medium with the computer program |
-
1979
- 1979-11-20 CH CH1032679A patent/CH643060A5/en not_active IP Right Cessation
-
1980
- 1980-10-08 GB GB8032472A patent/GB2064106A/en not_active Withdrawn
Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0073879A2 (en) * | 1981-08-26 | 1983-03-16 | Zellweger Uster Ag | Titercontrol device on spin cables from chemical fibres |
| EP0073879A3 (en) * | 1981-08-26 | 1985-09-18 | Zellweger Uster Ag | Titercontrol device on spin cables from chemical fibres |
| EP0100412A2 (en) * | 1982-07-02 | 1984-02-15 | American Cyanamid Company | Suture inspection and gauging system |
| EP0100412A3 (en) * | 1982-07-02 | 1985-12-11 | American Cyanamid Company | Suture inspection and gauging method and system |
| GB2144536A (en) * | 1983-08-04 | 1985-03-06 | Nanometrics Inc | Optical dimension measuring system |
| EP0182660A2 (en) * | 1984-11-21 | 1986-05-28 | E.I. Du Pont De Nemours And Company | Light-scattering method for measuring average cross-sectional shape parameters of a yarn |
| US4634280A (en) * | 1984-11-21 | 1987-01-06 | E. I. Dupont De Nemours And Company | Method for measuring shape parameters of yarn |
| EP0182660A3 (en) * | 1984-11-21 | 1987-08-19 | E.I. Du Pont De Nemours And Company | Light-scattering method for measuring average cross-sectional shape parameters of a yarn |
| GB2215835B (en) * | 1988-02-05 | 1992-01-29 | Truetzschler Gmbh & Co Kg | Sliver thickness measurement. |
| US5167150A (en) * | 1989-01-04 | 1992-12-01 | Zellweger Uster, Inc. | Apparatus and methods for testing tension-elongation or cross-sectional properties of single fibers and multiple fiber bundles |
| US5203206A (en) * | 1989-01-04 | 1993-04-20 | Zellweger Uster, Inc. | Apparatus and methods for testing tension-elongation or cross-sectional properties of single fibers and multiple fiber bundles |
| US5469253A (en) * | 1990-03-14 | 1995-11-21 | Zellweger Uster, Inc. | Apparatus and method for testing multiple characteristics of single textile sample with automatic feed |
| US5430301A (en) * | 1990-03-14 | 1995-07-04 | Zellweger Uster, Inc. | Apparatus and methods for measurement and classification of generalized neplike entities in fiber samples |
| US5270787A (en) * | 1990-03-14 | 1993-12-14 | Zellweger Uster Inc. | Electro-optical methods and apparatus for high speed, multivariate measurement of individual entities in fiber or other samples |
| US5291024A (en) * | 1991-06-17 | 1994-03-01 | International Trading S.R.L. | Method for determining the position and shape of a yarn fed to a textile machine |
| US5414520A (en) * | 1992-03-17 | 1995-05-09 | Zellweger Uster Ag | Process and device for detecting impurities in a textile test material |
| WO1993019359A1 (en) * | 1992-03-17 | 1993-09-30 | Zellweger Uster Ag | Process and device for detecting impurities in a textile test sample |
| CN1057387C (en) * | 1992-03-17 | 2000-10-11 | 泽韦格路瓦有限公司 | Process and device for detecting impurities in a textile test material |
| EP0627623A3 (en) * | 1993-03-31 | 1997-03-05 | Luwa Ag Zellweger | Method and apparatus for determining the surface structure of yarns. |
| WO1999036746A1 (en) * | 1998-01-14 | 1999-07-22 | Rieter Elitex A.S. | A method of determining the thickness and/or the homogeneity of a moving linear textile formation and a device for carrying out the method |
| US6659386B1 (en) | 1998-12-17 | 2003-12-09 | W. Schlafhorst Ag & Co. | Method and apparatus for contactless yarn monitoring in a spinning or bobbin winding machine |
| EP1028305A2 (en) * | 1999-02-12 | 2000-08-16 | W. SCHLAFHORST AG & CO. | Procedure and device to determine at least one parameter of a wirelike object |
| EP1028305A3 (en) * | 1999-02-12 | 2001-11-14 | W. SCHLAFHORST AG & CO. | Procedure and device to determine at least one parameter of a wirelike object |
| WO2002037054A1 (en) * | 2000-11-02 | 2002-05-10 | Rieter Cz, A.S. | Method and device for contactless measurement of a linear textile formation such as yarn etc. |
| US7057197B2 (en) | 2000-11-02 | 2006-06-06 | Rieter Cz A.S. | Method and device for contactless measurement of a linear textile formation such as yarn etc |
| CZ298929B6 (en) * | 2000-11-02 | 2008-03-12 | Rieter Cz A. S. | Device for contactless measurement of a linear textile formation |
| EP1265051A2 (en) * | 2001-06-07 | 2002-12-11 | Rieter CZ a.s. | A method of monitoring a moving linear textile formation and a device for carrying out the method |
| EP1265051A3 (en) * | 2001-06-07 | 2003-12-10 | Rieter CZ a.s. | A method of monitoring a moving linear textile formation and a device for carrying out the method |
| CZ299274B6 (en) * | 2001-06-07 | 2008-06-04 | Rieter Cz A. S. | Method of monitoring movement of a linear textile formation, and device for making the same |
| EP1408332A1 (en) * | 2002-10-08 | 2004-04-14 | Rieter CZ a.s. | A device for monitoring a moving linear textile formation, in particular a yarn |
| CZ299747B6 (en) * | 2002-10-08 | 2008-11-12 | Rieter Cz A.S. | Device for monitoring moving linear textile formation, preferably yarn |
| US7333202B2 (en) | 2004-11-06 | 2008-02-19 | Oerlikon Textile Gmbh & Co. Kg | Yarn sensor |
| US20150022813A1 (en) * | 2013-07-16 | 2015-01-22 | Rieter Cz S.R.O. | CMOS Optical Detector Comprising Plurality of Optical Elements for Device for Monitoring Parameters of Moving Yarn on Textile Machines |
| US9347889B2 (en) * | 2013-07-16 | 2016-05-24 | Rieter Cz S.R.O. | CMOS optical detector with a plurality of optical elements for device for monitoring parameters of a moving yarn on textile machines |
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|---|---|
| CH643060A5 (en) | 1984-05-15 |
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