EP1242659A1 - Verfahren und vorrichtung zum erkennen und ausschleusen von fremdmaterial in einem faserstrom aus verdichteten textilen fasern - Google Patents
Verfahren und vorrichtung zum erkennen und ausschleusen von fremdmaterial in einem faserstrom aus verdichteten textilen fasernInfo
- Publication number
- EP1242659A1 EP1242659A1 EP00979313A EP00979313A EP1242659A1 EP 1242659 A1 EP1242659 A1 EP 1242659A1 EP 00979313 A EP00979313 A EP 00979313A EP 00979313 A EP00979313 A EP 00979313A EP 1242659 A1 EP1242659 A1 EP 1242659A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller
- fiber stream
- light
- foreign material
- stream
- 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.)
- Granted
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
- D01G31/003—Detection and removal of impurities
Definitions
- the invention relates to a method and a device for recognizing and discharging foreign material in a fiber stream made of compressed textile fibers.
- a machine for detecting foreign parts in fiber streams in which the fibers are compressed in a shaft and guided past a number of color sensors.
- the background is kept in a color that is similar to the fibers to be examined.
- the background is formed by a roller or a conveyor belt, the surface of which has a clear structure that favors the movement of the fibers.
- a disadvantage of this machine is that the surface of the conveyor belt or the roller, which has a surface made of rubber, has to change color over time due to the action of light and dirt and has to be replaced periodically. This is also because the structure of the surface changes over time, in particular soiling.
- this construction with the moving background is complex and means that the fibers can only be observed and measured from one side.
- the machine must be able to distinguish three color levels, namely one for the background, one for flakes made of good fibers and one for foreign material, which places high demands on the optical elements.
- WO 95/16909 a device for the “on-line” detection of impurities in white fiber mass is also known, in which the fiber mass is passed between two rollers lying opposite one another, one roller consisting of transparent material. Behind the roller consists of Transparent material has optics with a detector that receives light from the fiber mass that passes through the transparent roller, which is driven by two drafting cylinders on both sides of the roller made of transparent material.
- a disadvantage of this device is that it detects a strip of the previously rolled fiber material that is at most four millimeters wide in order to be able to use a photodiode array as a detector. This means that this device only is suitable for very thin fiber masses and low speeds. It cannot be enlarged arbitrarily to examine thicker fiber masses, because in this case the combination of the transparent roller and the evaluation unit arranged next to the roller would no longer make it possible to work satisfactorily. This device is therefore not suitable for industrial use for testing raw materials for the manufacture of textiles.
- the invention as characterized in the claims, therefore solves the problem of creating a method and a device which avoid the disadvantages mentioned and allow the fiber stream to be tested continuously at high speeds in industrial use, the test conditions overlapping do not change for a long time.
- the object is achieved in that the fiber stream is compressed in sections, driven in a form-fitting manner, optically recorded and examined for the presence of foreign material.
- the fiber stream is preferably driven in a form-fitting manner via offset sections where the optical detection also takes place.
- the optically detected sections have a limited and adjustable thickness.
- the light from a light source reflected by the fiber stream is broken down into several colors and a signal is obtained from each color, which is evaluated separately in order to detect foreign material that responds particularly strongly to a color.
- the device has at least one roller-shaped element which has elements for interlocking engagement in the fiber stream and for driving the fiber stream, between which light-conducting elements are arranged.
- the roller-shaped element can, however, also be made transparent as a whole.
- Two roller-shaped elements are preferably arranged opposite one another, the elements of which are designed as teeth for positive engagement, intermesh without contact and form a continuous measuring channel with offset sections for the fiber stream.
- Light-conducting elements are arranged side by side in columns and rows on the roller-shaped element.
- a common evaluation unit is connected to several optical evaluation modules, which is connected to an optical conductor in one position of the roller-shaped element.
- the evaluation module has filters in order to split the reflected light into several defined colors.
- the evaluation unit with the evaluation modules is preferably arranged in a roller-shaped element.
- the fiber stream is preferably optically recorded from both sides.
- the advantages achieved by the invention are to be seen in particular in that a homogenized section is formed in the fiber stream for the detection of the foreign material, in which section only fibers and any foreign substances present appear.
- the device also serves for the positive delivery of the fiber stream in the measuring channel. It is possible to detect the fiber stream from two sides, which allows detection of the foreign material with increased certainty without the device taking up a lot of space.
- the security mentioned is also increased in that the fiber stream for the measurement has only a small and adjustable thickness.
- the fiber material is guided and compressed in front of the sensors so that it appears as a surface, which makes the fiber stream appear homogeneous, thus reducing the formation of shadows and increasing the contrast to different colors, since the background in front of which is captured does not appear at all.
- the use of photodiodes for the detection of light further increases the accuracy of the detection.
- the proposed solution also makes it possible to use light-emitting diodes with white light as the light source, which, in contrast to halogen light, results in less heating and more uniform light over a longer period of time.
- Figure 1 is a schematic view of the device according to the invention
- FIGS. 2, 3 and 6 each show a schematic view of part of the device according to FIG. 1,
- FIGS. 4 and 5 each show a further embodiment of the device
- Figure 7 is a block diagram of part of the device.
- FIG. 8 and 9 is a schematic representation of processes in the device.
- FIG. 1 shows a device which consists of the following processing stages: condenser 1, opener 2, congestion channel 3, foreign matter detection device 4, foreign matter separation device 5 and output channel 6 for cleaned fiber material.
- other parts can be seen such as: foreign matter collecting container 7, separating device 8, control unit 9, measuring connection 10, control connection 11, input and output unit 12, and a compressed air line 13 for the separating device 8.
- the stage for the foreign substance detection device 4 is shown in more detail in FIG. 2.
- This shows two roller-shaped elements 14 and 15, which are driven separately but synchronously and move in the direction of arrows 16 and 17.
- the elements 14 and 15 delimit a measurement channel 18 into which the accumulation channel 3 opens, but the cross section of the measurement channel 18 is considerably smaller than that of the accumulation channel 3.
- optical evaluation units 19 and 20 for signal processing arranged fixed.
- FIG. 3 shows part of the foreign matter detection device 4 according to FIG. 2, the measuring channel 18, parts of the roller-shaped elements 14 and 15 and the evaluation units 19 and 20 for signal processing being recognized.
- Teeth 21 and 22 are arranged on the circumference of the roller-shaped elements 14 and 15, which mesh with one another without touching one another, so that a measuring channel 18 between the teeth 21, 22 always remains open.
- transparent light guides such as preferably lenses 23, 24, are arranged on the roller-shaped elements, which produce a light-conducting connection between the measuring channel 18 and the interior 25, 26 of the roller-shaped elements 14, 15.
- Each evaluation unit 19, 20 for signal processing consists of several optical evaluation modules, which are equipped with a lens or lens 27, several color filters and light guides 28, and optical converters 29 for signal processing.
- FIG. 4 shows a device with only one roller-shaped element 14, which is arranged in front of a wall 30, so that a channel 31 for the fiber stream is formed between the element 14 and the wall 30.
- a simple but driven roller 32 can also be provided, as shown in FIG. 5.
- FIG. 6 shows a simplified illustration of part of the structure of the roller-shaped elements 14, 15 on which transparent light guides 23, 24 are arranged in rows 33, 34 and columns 35, 36.
- FIG. 7 is a schematic representation of the evaluation units 19, 20 with the lenses or objectives 27 and the light guides 28. These are connected via color filters 38 to measuring elements 37 for the intensity of the filtered light.
- a current-voltage converter 39, an amplifier 40 and an A / D converter 41 are connected in series. This is connected to an element 42 for linearization and standardization.
- This is again on the one hand connected to a circuit for evaluating the light intensity 43 and on the other hand directly to a memory 44 for the individual filtered color values and the entire color intensity.
- This memory 44 is in turn connected on the one hand to a unit 46 for determining nominal color values and to a delay circuit 45.
- a unit 47 for defining and storing tolerance values is connected to the unit 46 and is connected again to a comparator 48.
- the comparator 48 is also connected to the delay circuit 45 and determines the state of an output 49.
- a light guide 28 is also connected to a light source 50.
- a position sensor 51 constantly measures the position of the roller-shaped elements 14, 15. The position sensor 51 controls the A / D converter 41 and the delay circuit 45 via a line 52. The connection of the nominal color values can be triggered via a connection 53. Tolerance values are defined via a connection 54.
- Fig. 8 is a schematic representation of the evaluation units 19, 20 in the two roller-shaped elements 14, 15. Therefore, here are several lenses or lenses 27a ⁇ - 27 ⁇ and 27a - 27n 2 and several evaluation circuits 29a ⁇ - 29n ⁇ and 29a 2 - 29a n side by side arranged.
- Each column 35, 36 (FIG. 6) is assigned a lens or an objective 27 with an evaluation circuit 29.
- the evaluation circuits 29 can also be combined into groups and a single common output 55 to
- the mode of operation of the invention is as follows:
- a fiber stream in the form of flakes 60 strikes, for example
- the condenser 1 separates the flakes 60 from the air flow 61 and feeds the flakes to the opener 2, which at least the flakes then divides or opens when they exceed a certain level.
- the flakes 60 then enter the accumulation channel 3, where they collect and are drawn into the measurement channel 18 from below. This is done by the roller-shaped elements 14, 15, the teeth 21, 22 of which grip, compress and guide the fiber material, so that stepped or offset sections 62, 63 are formed, where the fiber mass is optically detected as described later.
- the fiber stream is then expelled downward and sucked off by a further air stream, passing through the separating device 8.
- the fibers caught in section 62 which lies just in front of the light guide 24 and completely cover the background, are illuminated by the light source 50 via the light guide 24.
- the light reflected by the fibers passes via the objective 27 (FIG. 3) and the light guides 28 into the color filter 38 (FIG. 7), where portions of the red (R), the green (G) and the blue are formed from the reflected light (B)
- Light is filtered out and released separately to the measuring elements 37. These components are converted to voltage values in the current-voltage converter 39.
- the voltages thus generated for each color are transmitted via the amplifier 40 to the analog / digital converter 41, which is clocked via a signal from the position sensor 51 from the line 52 and thus through the position of the light guides 24 on the roller-shaped elements 14, 15 ,
- the voltages reached separately for each color are fed to the element 42 for linearization and normalization in accordance with the respective color (red, green, blue) and then output to the memory 44 and, summed up to a total intensity, to the intensity meter 43.
- the normalized values of the voltages for the individual colors are fed to the circuit for evaluating the light intensity 43 for determining the color intensity. Nominal values for each color and each intensity are defined in the unit 46, for which purpose an input for calibration via the connection 53 is used.
- Each nominal value is also assigned tolerance values in the unit 47, which are determined via the connection 54.
- the signals from the memory 44 are fed to the delay circuit 45, which delays them as long as a flake needs to get from the section 63 in the measuring channel 18, where it is detected, to the separating device 8.
- the device shown in FIG. 7 is part of the control unit 9 (FIG.
- each color can be understood as a vector R, G, B, wherein the vectors R, G, B can be combined into a resulting vector H if the vectors R, G and B represent the same unit size.
- the measured intensity values for each color result in a correspondingly dimensioned vector (R, G and B), which collectively result in a vector RGBH.
- a tolerance range is defined by the set tolerances in the unit 47, which is represented here by the cube 65. If the end point of the vector RGBH lies in this tolerance range 65, there is no reason to remove flakes. However, if the vector lies, for example, in an area 66 next to the tolerance area, there is a reason to do so.
- Algorithms can also be specified which, for example, cause a plurality of separating devices 8 lying next to one another to be activated together. Then, as shown in FIG. 8, a plurality of evaluation circuits 29 are combined into groups with in each case common outputs. So signals for the excretion of foreign substances are output via the outputs 55, 56, 57, 58, and / or 59. For this purpose, further tolerances could be specified, for example, which, if exceeded, trigger such common excretions, although the tolerances for a single output have not yet been exceeded.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH230899 | 1999-12-16 | ||
CH230899 | 1999-12-16 | ||
PCT/CH2000/000657 WO2001044545A1 (de) | 1999-12-16 | 2000-12-11 | Verfahren und vorrichtung zum erkennen und ausschleusen von fremdmaterial in einem faserstrom aus verdichteten textilen fasern |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1242659A1 true EP1242659A1 (de) | 2002-09-25 |
EP1242659B1 EP1242659B1 (de) | 2004-03-17 |
Family
ID=4230772
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00979313A Expired - Lifetime EP1242659B1 (de) | 1999-12-16 | 2000-12-11 | Verfahren und vorrichtung zum erkennen und ausschleusen von fremdmaterial in einem faserstrom aus verdichteten textilen fasern |
Country Status (6)
Country | Link |
---|---|
US (1) | US6848149B1 (de) |
EP (1) | EP1242659B1 (de) |
JP (1) | JP2003517108A (de) |
CN (1) | CN1245546C (de) |
DE (1) | DE50005738D1 (de) |
WO (1) | WO2001044545A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10233011B4 (de) * | 2002-07-20 | 2020-03-19 | Trützschler GmbH & Co Kommanditgesellschaft | Vorrichtung an einer Spinnereimaschine zur Erfassung und Beurteilung von Textilfasermaterial |
JP4654086B2 (ja) * | 2005-07-29 | 2011-03-16 | 本田技研工業株式会社 | 弾性部材の品質評価方法及び装置 |
CN113957544B (zh) * | 2021-10-21 | 2022-08-16 | 高梵(浙江)信息技术有限公司 | 一种纳米抗菌羽绒的加工处理装置 |
SE545701C2 (en) * | 2022-03-18 | 2023-12-12 | Respin Ab | Arrangement for separating a woven textile into recovered fibers and textile residual |
Family Cites Families (23)
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US3157915A (en) * | 1959-07-09 | 1964-11-24 | Geo W Bollman & Co Inc | Control device |
JPS6221047A (ja) * | 1985-07-19 | 1987-01-29 | Nippon Mengiyou Gijutsu Keizai Kenkyusho | 繊維材料中の着色異物検出方法とその装置 |
JPS63274863A (ja) * | 1987-05-01 | 1988-11-11 | Tsuzuki Boseki Kk | 原綿中の異物検出方法及び装置 |
DE3734145A1 (de) * | 1987-10-09 | 1989-04-27 | Hollingsworth Gmbh | Verfahren und vorrichtung zum reinigen und oeffnen von in flockenform befindlichem fasergut, z. b. baumwolle |
US5130559A (en) * | 1989-08-26 | 1992-07-14 | Trutzschler Gmbh & Co. Kg | Method and apparatus for recognizing particle impurities in textile fiber |
US5321496A (en) * | 1990-03-14 | 1994-06-14 | Zellweger Uster, Inc. | Apparatus for monitoring trash in a fiber sample |
US5539515A (en) * | 1990-03-14 | 1996-07-23 | Zellweger Uster, Inc. | Apparatus and methods for measurement and classification of trash 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 |
US5058444A (en) * | 1990-04-25 | 1991-10-22 | The United States Of America As Represented By The Secretary Of Agriculture | System for analyzing entrained solids such as cotton or seed |
CH680536A5 (de) * | 1990-04-26 | 1992-09-15 | Peyer Ag Siegfried | |
DE4129882C2 (de) * | 1990-09-17 | 2002-02-07 | Truetzschler Gmbh & Co Kg | Vorrichtung zum Abscheiden metallischer Verunreinigungen aus einer Fasertransportstrecke in der Spinnereivorbereitung |
DE59108679D1 (de) * | 1990-11-02 | 1997-05-28 | Rieter Ag Maschf | Verfahren zum Feststellen einer Eigenschaft eines Faserverbandes |
US5274243A (en) * | 1992-05-29 | 1993-12-28 | Eastman Kodak Company | Cylindrical allumination system for inspection of sheet material |
JPH06242021A (ja) * | 1992-07-22 | 1994-09-02 | Ohtori Kiko Co Ltd | 原綿の色物異物検出方法及び装置 |
US5383135A (en) * | 1992-12-31 | 1995-01-17 | Zellweger Uster, Inc. | Acquisition, measurement and control of thin webs on in-process textile materials |
DE4340173A1 (de) * | 1993-11-25 | 1995-06-01 | Hergeth Hubert A | Verfahren zum Erkennen und Ausschleusen von andersfarbigen Fremdteilen in Faserverarbeitungslinien |
AUPM300993A0 (en) * | 1993-12-16 | 1994-01-20 | Commonwealth Scientific And Industrial Research Organisation | Instrument |
DE4415907A1 (de) * | 1994-05-06 | 1995-11-09 | Hergeth Hubert A | Hintergrund beim Erkennen von Fremdteilen in Faserströmen |
GR960100084A (el) * | 1995-04-13 | 1996-12-31 | Trutzschler Gmbh & Co Kg | Μηχανισμος για ενα λαναρι για τον εντοπισμο οχλουντων σωματιδιων, ιδιαιτερως σωματιδιων προς απορριψη, κομβων, θυλακωτων κομβων, θηλειων και παρομοιων. |
DE19516568A1 (de) * | 1995-05-05 | 1996-11-07 | Truetzschler Gmbh & Co Kg | Vorrichtung in einer Spinnereivorbereitungseinrichtung (Putzerei) zum Erkennen und Ausscheiden von Fremdstoffen, z. B. Gewebestücke, Bänder, Schnüre, Folienstücke, in bzw. aus Fasergut |
EP0879905A1 (de) * | 1997-05-20 | 1998-11-25 | Jossi Holding AG | Verfahren und Vorrichtung zum Erkennen und Ausscheiden von Fremdstoffen in Fasermaterial |
IT1306941B1 (it) * | 1998-02-19 | 2001-10-11 | Truetzschler & Co | Dispositivo nella preparazione alla filatura,per la separazione dicorpi estranei su un cilindro in rapida rotazione per l'apertura di |
DE19806892A1 (de) * | 1998-02-19 | 1999-08-26 | Truetzschler Gmbh & Co Kg | Vorrichtung in der Spinnereivorbereitung zum Abscheiden von Fremdstoffen an einer schnellaufenden Walze zum Öffnen von Fasermaterial, z. B. Baumwolle u. dgl. |
-
2000
- 2000-12-11 EP EP00979313A patent/EP1242659B1/de not_active Expired - Lifetime
- 2000-12-11 DE DE50005738T patent/DE50005738D1/de not_active Expired - Fee Related
- 2000-12-11 JP JP2001545622A patent/JP2003517108A/ja active Pending
- 2000-12-11 CN CNB008172714A patent/CN1245546C/zh not_active Expired - Fee Related
- 2000-12-11 WO PCT/CH2000/000657 patent/WO2001044545A1/de active IP Right Grant
- 2000-12-11 US US10/168,110 patent/US6848149B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0144545A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1242659B1 (de) | 2004-03-17 |
DE50005738D1 (de) | 2004-04-22 |
CN1411518A (zh) | 2003-04-16 |
US6848149B1 (en) | 2005-02-01 |
JP2003517108A (ja) | 2003-05-20 |
WO2001044545A1 (de) | 2001-06-21 |
CN1245546C (zh) | 2006-03-15 |
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