DE102007040224A1 - Method for optical monitoring of thread quality with correction for temperature and for ageing of detectors - Google Patents
Method for optical monitoring of thread quality with correction for temperature and for ageing of detectors Download PDFInfo
- Publication number
- DE102007040224A1 DE102007040224A1 DE102007040224A DE102007040224A DE102007040224A1 DE 102007040224 A1 DE102007040224 A1 DE 102007040224A1 DE 102007040224 A DE102007040224 A DE 102007040224A DE 102007040224 A DE102007040224 A DE 102007040224A DE 102007040224 A1 DE102007040224 A1 DE 102007040224A1
- Authority
- DE
- Germany
- Prior art keywords
- temperature
- sensor
- yarn
- measured
- light intensity
- 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- Withdrawn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
Classifications
-
- 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
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
- D01H13/22—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to presence of irregularities in running material
-
- 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
- D01H13/26—Arrangements facilitating the inspection or testing of yarns or the like in connection with spinning or twisting
-
- 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—Textiles 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
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/40—Temperature; Thermal conductivity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
- B65H2515/60—Optical characteristics, e.g. colour, light
-
- 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
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Betrieb einer Vorrichtung und eine Vorrichtung zur optischen Detektion der Qualität eines Garns mit einer Lichtquelle und einem Sensor zur Messung des vom Garn transmittierten oder remittierten Lichtes.The The invention relates to a method for operating a device and a device for the optical detection of the quality of Yarn with a light source and a sensor for measuring the yarn transmitted or remitted light.
Die
Es ist daher die Aufgabe der vorliegenden Erfindung die Temperaturabhängigkeit der Messsignale zu beseitigen oder zumindest zu verringern.It Therefore, the object of the present invention is the temperature dependence eliminate or at least reduce the measurement signals.
Die Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Verfahrensanspruches 1 sowie des Vorrichtungsanspruches 4 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.The The object is achieved by the characterizing Features of the method claim 1 and the device claim 4 solved. Advantageous developments of the invention are the subject the dependent claims.
Zur Lösung der Aufgabe wird die vom Sensor gemessene Lichtstärke in Abhängigkeit von einer gemessenen Temperatur korrigiert. Dadurch wird theoretisch die Temperaturabhängigkeit der Messsignale in einfacher Weise vollständig eliminiert. Das Verfahren ist nur durch die Messgenauigkeit der Temperatur und die Genauigkeit der zuvor bestimmten Korrekturwerte begrenzt. Die Korrekturwerte können dabei durch eine Versuchsreihe in einem Temperaturschrank gewonnen werden. Dabei wird in dem Temperaturschrank der relevante Temperaturbereich durchfahren und zu jedem Temperaturwert eine Leermessung des transmittierten beziehungsweise remittierten Lichtes durchgeführt und so die Korrekturfaktoren bestimmt, die zu einem konstanten Messwert führen.to The solution to the problem becomes the light intensity measured by the sensor corrected as a function of a measured temperature. As a result, the temperature dependence of the Measurement signals completely eliminated in a simple manner. The procedure is only by the measuring accuracy of the temperature and limits the accuracy of the previously determined correction values. The Correction values can be determined by a series of tests in be obtained from a temperature cabinet. It is in the temperature cabinet go through the relevant temperature range and to each temperature value an empty measurement of the transmitted or remitted Performed light and so determines the correction factors, which lead to a constant reading.
Vorteilhafterweise werden die zu einer bestimmten Temperatur gehörenden Korrekturwerte in einer Tabelle abgelegt. Während des regulären Betriebes des Garnsensors kann dann ein der gemessenen Temperatur zugeordneter Korrekturwert aus der Tabelle entnommen werden.advantageously, become the correction values belonging to a certain temperature stored in a table. During the regular Operation of the yarn sensor may then be one of the measured temperature assigned correction value can be taken from the table.
Gemäß einer bevorzugten Ausführungsform des erfindungsgemäßen Verfahrens wird durch Multiplikation der gemessenen Lichtstärke und des Korrekturwertes ein korrigierter temperaturunabhängiger Lichtstärkewert ermittelt.According to one preferred embodiment of the invention Procedure is by multiplying the measured light intensity and the correction value is a corrected temperature-independent luminous intensity value determined.
Zur Lösung der Aufgabe wird ferner eine Vorrichtung zur optischen Detektion der Qualität eines Garns mit einer Steuervorrichtung vorgeschlagen, die dazu ausgebildet ist, die vom Sensor gemessene Lichtstärke in Abhängigkeit von einer mittels eines Temperatursensors gemessenen Temperatur zu korrigieren.to Solution of the problem is also a device for optical Detecting the quality of a yarn with a control device proposed, which is designed to measure the light intensity measured by the sensor as a function of one by means of a temperature sensor corrected measured temperature.
Gemäß einer bevorzugten Ausführungsform ist der Steuervorrichtung ein nichtflüchtiger Speicher zugeordnet, in dem eine Tabelle hinterlegt ist, die dem gemessenen Temperaturwert einen Korrekturwert zuweist. Ein solcher nichtflüchtiger Speicher kann zum Beispiel ein EEPROM sein. Beim Initialisieren der Garnsensorsteuerung kann dann die Tabelle in einen Arbeitsspeicher geladen werden.According to one preferred embodiment, the control device is a nonvolatile memory associated with a table is deposited, the measured temperature value, a correction value assigns. Such a non-volatile memory can for Example be an EEPROM. When initializing the yarn sensor control then the table can be loaded into a working memory.
Gemäß einer Weiterbildung des erfindungsgemäßen Garnsensors ist mittels der Steuereinrichtung das Produkt der gemessenen Lichtstärke und des Korrekturwertes bestimmbar, und das Produkt repräsentiert einen korrigierten temperaturunabhängigen Lichtstärkewert.According to one Further development of the yarn sensor according to the invention is the product of the measured light intensity by means of the control device and the correction value, and the product represents a corrected temperature-independent luminous intensity value.
Gemäß einer weiteren Ausführungsform ist der Temperatursensor auf einer Platine mit einer Lichtquelle, einem Sensor zur Messung des vom Garn transmittierten oder remittierten Lichtes und einem Prozessor angeordnet. Dadurch ist zum einen die direkte Nähe des Temperatursensors zu den temperaturempfindlichen Bauteilen gegeben, zum anderen ist eine leichte Signalübertragung an den Prozessor möglich, der Bestandteil der Steuervorrichtung ist.According to one In another embodiment, the temperature sensor is on a Board with a light source, a sensor for measuring the yarn transmitted or remitted light and a processor arranged. As a result, on the one hand, the direct proximity of the temperature sensor given to the temperature-sensitive components, on the other hand is a slight signal transmission to the processor possible, which is part of the control device.
Es kann ein Temperatursensor verwendet werden, der ein temperaturproportionales Impuls-Pausen-Verhältnis liefert. Durch die Bereitstellung eines digitalen Signals wird die Kommunikation mit dem digital arbeitenden Prozessor erleichtert. Der Temperatursensor kann natürlich auch analoge Signale liefern, die dann für den Prozessor in digitale Signale umgewandelt werden.It a temperature sensor can be used which is a temperature proportional Pulse-to-pause ratio delivers. By providing a digital signal is communicating with the digital worker Processor relieved. The temperature sensor can of course also provide analog signals, which then for the processor be converted into digital signals.
Die Erfindung wird nachfolgend anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert.The Invention is described below with reference to an illustrated in the drawings Embodiment explained in more detail.
Es zeigen:It demonstrate:
Die
Bauelemente des Garnsensors
Das
von der Linse
Auf
der Platine ist weiterhin ein Speicherbaustein
Der dargestellte Verlauf ergibt sich nach dem Einschalten beziehungsweise Anschließen des Sensors an die Versorgungsspannung. Die Temperatur T steigt von der Umgebungstemperatur auf eine durch die Verlustwärme hervorgerufene Temperatur. Wie man sieht, nimmt der unkorrigierte Messwert ab. Aus einer solchen Kurve lässt sich nun zu jedem auftretendem Temperaturwert ein Korrekturfaktor bestimmen. Bei einer Leermessung muss sich dann für den korrigierten Wert eine Gerade parallel zur Zeitachse ergeben.Of the Course shown results after switching or Connecting the sensor to the supply voltage. The Temperature T rises from the ambient temperature to one through the Heat loss caused by temperature. As you can see, the uncorrected reading decreases. Out of such a curve Now a correction factor for each occurring temperature value determine. At a blank measurement must then for the corrected Value a straight line parallel to the time axis.
Die Korrekturwerte lassen sich noch genauer bestimmen, wenn man in einem Temperaturschrank die relevanten Temperaturwerte gezielt einstellt und den zugehörigen Korrekturwert aus einer Leermessung bestimmt. Um reproduzierbare Korrekturwerte zu erhalten, sollte der Garnsensor vor der Messung getempert werden. Das heißt der Garnsensor wird zuvor einmal erhitzt, um mechanische Verspannungen zu beseitigen. Dadurch wird erreicht, dass eine einmalige mechanische Entspannung nicht zu einem falschen Korrekturwert führt. Wie oben erwähnt, können temperaturbedingte mechanische Längenänderungen, zum Beispiel des Lichtkanals zu Fehlern im Messsignal der Empfangsdiode führen.The Correction values can be determined even more accurately if you are in one Temperature cabinet specifically sets the relevant temperature values and the associated correction value from a blank measurement certainly. In order to obtain reproducible correction values, should the yarn sensor should be tempered before the measurement. This means The yarn sensor is previously heated once to avoid mechanical tension to eliminate. This ensures that a one-time mechanical Relaxation does not lead to a wrong correction value. As mentioned above, temperature-induced mechanical Length changes, for example the light channel lead to errors in the measuring signal of the receiving diode.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - DE 10009131 [0002] - DE 10009131 [0002]
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007040224A DE102007040224A1 (en) | 2007-08-25 | 2007-08-25 | Method for optical monitoring of thread quality with correction for temperature and for ageing of detectors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007040224A DE102007040224A1 (en) | 2007-08-25 | 2007-08-25 | Method for optical monitoring of thread quality with correction for temperature and for ageing of detectors |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007040224A1 true DE102007040224A1 (en) | 2009-02-26 |
Family
ID=40280267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102007040224A Withdrawn DE102007040224A1 (en) | 2007-08-25 | 2007-08-25 | Method for optical monitoring of thread quality with correction for temperature and for ageing of detectors |
Country Status (1)
Country | Link |
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DE (1) | DE102007040224A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH703266A1 (en) * | 2010-06-09 | 2011-12-15 | Uster Technologies Ag | Device for optoelectronic determination of characteristics of yarn. |
DE102013110814B4 (en) | 2012-10-02 | 2021-07-29 | Rieter Cz S.R.O. | Device for tracking the quality of a moving linear textile material, particularly a yarn |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2933297A1 (en) * | 1979-08-17 | 1981-03-26 | Hoechst Ag, 65929 Frankfurt | Monitoring variations in dia. of moving fibres - carried out optically using control loop regulating light emitting diode emission |
DE3510521A1 (en) * | 1985-03-22 | 1986-10-02 | Fritz 7347 Bad Überkingen Stahlecker | Process for adjusting the operating parameters of a spinning machine |
DE3834478A1 (en) * | 1988-10-11 | 1990-04-12 | Amann & Soehne | Method for measuring the number of irregularities in linear density and device for carrying out the method |
DE10009131A1 (en) | 2000-02-26 | 2001-08-30 | Schlafhorst & Co W | Method and device for the optical detection of impurities, in particular foreign fibers, in longitudinally moving yarn |
US6842250B2 (en) * | 1999-12-23 | 2005-01-11 | Byk-Gardner Gmbh | Device for a quantified determination of the quality of surfaces |
DE102004013776A1 (en) * | 2004-03-20 | 2005-10-06 | Rieter Ingolstadt Spinnereimaschinenbau Ag | To clean a yarn of spinning faults, especially at an open-end spinner, on detection of a deviation from nominal values the spinning is interrupted and the spinner stopped for a yarn length to be calculated for removal |
-
2007
- 2007-08-25 DE DE102007040224A patent/DE102007040224A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2933297A1 (en) * | 1979-08-17 | 1981-03-26 | Hoechst Ag, 65929 Frankfurt | Monitoring variations in dia. of moving fibres - carried out optically using control loop regulating light emitting diode emission |
DE3510521A1 (en) * | 1985-03-22 | 1986-10-02 | Fritz 7347 Bad Überkingen Stahlecker | Process for adjusting the operating parameters of a spinning machine |
DE3834478A1 (en) * | 1988-10-11 | 1990-04-12 | Amann & Soehne | Method for measuring the number of irregularities in linear density and device for carrying out the method |
US6842250B2 (en) * | 1999-12-23 | 2005-01-11 | Byk-Gardner Gmbh | Device for a quantified determination of the quality of surfaces |
DE10009131A1 (en) | 2000-02-26 | 2001-08-30 | Schlafhorst & Co W | Method and device for the optical detection of impurities, in particular foreign fibers, in longitudinally moving yarn |
DE102004013776A1 (en) * | 2004-03-20 | 2005-10-06 | Rieter Ingolstadt Spinnereimaschinenbau Ag | To clean a yarn of spinning faults, especially at an open-end spinner, on detection of a deviation from nominal values the spinning is interrupted and the spinner stopped for a yarn length to be calculated for removal |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH703266A1 (en) * | 2010-06-09 | 2011-12-15 | Uster Technologies Ag | Device for optoelectronic determination of characteristics of yarn. |
DE102013110814B4 (en) | 2012-10-02 | 2021-07-29 | Rieter Cz S.R.O. | Device for tracking the quality of a moving linear textile material, particularly a yarn |
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OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8139 | Disposal/non-payment of the annual fee |