DE4332347A1 - Device for monitoring thread, especially in textile technology - Google Patents

Device for monitoring thread, especially in textile technology

Info

Publication number
DE4332347A1
DE4332347A1 DE19934332347 DE4332347A DE4332347A1 DE 4332347 A1 DE4332347 A1 DE 4332347A1 DE 19934332347 DE19934332347 DE 19934332347 DE 4332347 A DE4332347 A DE 4332347A DE 4332347 A1 DE4332347 A1 DE 4332347A1
Authority
DE
Germany
Prior art keywords
thread
radar
radar sensor
textile technology
monitoring
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.)
Ceased
Application number
DE19934332347
Other languages
German (de)
Inventor
Siegfried Hillenbrand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19934332347 priority Critical patent/DE4332347A1/en
Priority to CH261994A priority patent/CH687756A5/en
Publication of DE4332347A1 publication Critical patent/DE4332347A1/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • 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
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
    • B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
    • B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00—Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

A device is described for monitoring thread, especially in textile technology, which is characterised by the use of a radar sensor. This is preferably a coherent continuous wave radar (1) which operates in the microwave range from about 1 to 100 GHz. A common transmitting/receiving antenna (2) is connected to the radar, and irradiates the threads (3). By comparing the transmitted and reflected radiation, an output signal (Ua) is formed which can be used for controlling the corresponding installation or machine. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Fadenüberwachung, insbesondere in der Textiltechnik. Auf diesem Gebiet sind optische und kapazitive Vorrichtungen zur Einzelüberwachung von Fäden bekannt. Diese können jedoch nur feststellen, ob ein Faden vorhanden ist, bzw. ob er bewegt wird oder nicht. Die optischen Einrichtungen haben vor allem den Nachteil, daß sie infolge von Verschmutzung sehr störanfällig sind, wobei die Verschmutzung oder Flaumbildung stark von dem verwendeten Fadenmaterial abhängt. Bei kapazitiven Überwachungseinrichtungen ist es zudem nachteilig, daß nicht alle zur Anwendung kommenden Fadenmaterialien für dieses Maßprinzip gleichermaßen geeignet sind. Die kapazitiven Überwachungsvorrichtungen reagieren auch sehr stark auf sich verändernde Umweltbedingungen, wie z. B. Luftfeuchtigkeit und Staub. Daraus ergibt sich ebenfalls eine große Störanfälligkeit.The invention relates to a device for thread monitoring, especially in textile technology. Are in this area optical and capacitive devices for individual monitoring known by threads. However, these can only determine whether a thread is present or whether it is moved or not. The main disadvantage of the optical devices is that they are very prone to failure due to pollution, whereby the pollution or fluff formation greatly from that used Thread material depends. With capacitive Monitoring devices, it is also disadvantageous that not all thread materials used for this Dimensional principle are equally suitable. The capacitive Monitoring devices also react very strongly to themselves changing environmental conditions, such as B. humidity and Dust. This also results in a large one Susceptibility to failure.

Der Erfindung liegt die Aufgabe zugrunde, eine vielfältig einsetzbare, gegenüber Umgebungseinflüssen störfeste und in der Handhabung einfache Fadenüberwachungsvorrichtung vorzuschlagen.The invention has for its object a diverse usable, resistant to environmental influences and in  handling simple thread monitoring device to propose.

Diese Aufgabe wird erfindungsgemäß durch einen Radarsensor gelöst. Ein solcher läßt sich mit Hilfe moderner elektronischer Bauelemente sehr klein und mit einem in Anbetracht der überragenden Vorteile tragbaren Kostenaufwand realisieren.This object is achieved by a radar sensor solved. Such can be done with the help of modern electronic components very small and with an in Considering the outstanding benefits, portable cost realize.

In der beigefügten Zeichnung stellen darIn the accompanying drawing

Fig. 1 eine schematische Darstellung eines Radarsensorsystems und Fig. 1 is a schematic representation of a radar sensor system and

Fig. 2 eine räumliche Darstellung eines Radarsensors für einen Faden oder anderen Strang. Fig. 2 is a spatial representation of a radar sensor for a thread or other strand.

Mit Bezug auf Fig. 1 wird die Wirkungsweise wie folgt erläutert. Ein Dauerstrich-Radar 1 ist mit einer gemeinsamen Sende/Empfangsantenne 2 verbunden. Das Radar sendet über diese Antenne kontinuierlich Hochfrequenzenergie zu einem Faden 3, der das Ziel bildet. Es handelt sich um kohärente Wellen im Mikrowellenbereich von etwa 1 bis 100 GHz. Durch die Bewegung des Zieles entsteht eine Dopplerverschiebung, welche im Empfänger durch Vergleich mit dem Sender als Ausgangsspannung Ua meßbar wird. Diese Ausgangs Spannung ist cosinusförmig und direkt proportional zur Trägerfrequenz des Radars und zur Bewegungsgeschwindigkeit des Fadens. Die Amplitude der Ausgangsspannung hängt vom Querschnitt des Fadens 3 und von seinem Abstand zur Antenne 2 ab.The mode of operation is explained as follows with reference to FIG. 1. A continuous wave radar 1 is connected to a common transmit / receive antenna 2 . The radar continuously transmits high-frequency energy via this antenna to a thread 3 , which forms the target. These are coherent waves in the microwave range from approximately 1 to 100 GHz. The movement of the target creates a Doppler shift, which can be measured in the receiver by comparison with the transmitter as the output voltage Ua. This output voltage is cosine-shaped and directly proportional to the carrier frequency of the radar and the speed of movement of the thread. The amplitude of the output voltage depends on the cross section of the thread 3 and its distance from the antenna 2 .

Fig. 2 gibt ein Ausführungsbeispiel der äußerlichen Form eines Radarsensors für textile Anwendungen. Das Sensorgehäuse 4 ist ein Quader von etwa 20×20×50 mm. Es hat einen sehr tiefen Längsschlitz 5 von etwa 5 mm Breite, wobei ein über eine Rolle 6 laufender gespannter Faden 7 den Schlitz 5 durchsetzt. In einer der beiden durch den Längsschlitz 5 voneinander getrennten Gehäusehälften ist die erwähnte Sende/Empfangsantenne untergebracht. Das Gehäuse 4 kann außerdem eine elektronische Auswerteeinheit umfassen, welche die rückgestreute Leistung an ihrem Zeitverlauf erkennt und daraus ein Signal gewinnt, das über eine je nach dem Anwendungszweck gestaltete Schnittstelle an nachgeordnete Schalteinrichtungen, z. B. an eine selbstprogrammierbare Steuerung (SPS) weitergegeben wird. Dieses elektrische Signal wird über ein Kabel 8 weitergegeben, das an dem Sensorgehäuse 4 angesteckt ist und dem Radar die Betriebsspannung zuführt. Fig. 2 gives an embodiment of the external shape of a radar sensor for textile applications. The sensor housing 4 is a cuboid of approximately 20 × 20 × 50 mm. It has a very deep longitudinal slot 5 of approximately 5 mm in width, a tensioned thread 7 running over a roller 6 passing through the slot 5 . The aforementioned transmission / reception antenna is accommodated in one of the two housing halves separated from one another by the longitudinal slot 5 . The housing 4 can also include an electronic evaluation unit, which recognizes the backscattered power by its timing and obtains a signal therefrom, which is sent to downstream switching devices, e.g. B. is passed on to a self-programmable controller (PLC). This electrical signal is passed on via a cable 8 which is connected to the sensor housing 4 and supplies the operating voltage to the radar.

Allgemeine Vorteile eines Radarsensors, die auf dem Textilgebiet besonders zum Tragen kommen, sindGeneral advantages of a radar sensor based on the Textile area are particularly important

  • - Unempfindlichkeit gegen Verschmutzung. Es kann Flaum auf dem Sensor liegen.- Insensitivity to pollution. It can There is fluff on the sensor.
  • - großer Anwendungs-Temperaturbereich von -20° bis +60°C.- Wide application temperature range from -20 ° to + 60 ° C.
  • - hohe Abtastrate, d. h. kurze Reaktionszeit im Millisekunden-Bereich.- high sampling rate, i. H. short response time in Millisecond range.
  • - Einbaufähigkeit an Stellen, die infolge der Verwendung antistatischer niederohmiger Gleitmittel insbesondere bei kapazitiven Sensoren zu Betriebsstörungen führen würden.- Can be installed in places resulting from Use of antistatic, low-resistance lubricants especially with capacitive sensors Would cause malfunctions.

Radarsensoren eignen sich z. B. beim Spinnprozeß als sogenannte Luntenwächter, auch beim Chemiefaserspinnprozeß. Die Überwachung erfolgt vorteilhafterweise berührungslos. Durch die Erfassung der Changierbewegung kann ein Radarsensor einen Fadenspannungs-Sensor bekannter Technik ersetzen und dabei noch kostengünstiger sein. Ein besonderes Leistungsmerkmal ist die Möglichkeit, Dickstellen, d. h. Knoten oder längere Verdickungen sowie entsprechende Dünnstellen am laufenden Faden zu erkennen. Radar sensors are suitable for. B. in the spinning process as so-called match guard, also in the chemical fiber spinning process. The monitoring is advantageously carried out without contact. A radar sensor can detect the traversing movement replace a thread tension sensor known technology and be even cheaper. A special The feature is the possibility of thickening, i.e. H. Knots or longer thickening as well as corresponding To recognize thin spots on the running thread.  

Vorteilhafte Anwendungen für Radarsensoren ergeben sich aber auch im Drahtbereich bei der Herstellung und bei Aufwickelvorgängen jeder Art. Der "Faden" kann also auch aus Metall bestehen.However, there are advantageous applications for radar sensors also in the wire sector in the manufacture and at Winding processes of any kind. The "thread" can also be out Metal.

Ähnliche Verhältnisse wie bei der Überwachung eines dünnen Fadens ergeben sich bei der Überwachung eines Seiles aus größerem Abstand, was somit ebenfalls möglich ist. Als Beispiel mag die Überwachung eines Seiles von 1 cm Durchmesser aus einem Abstand von 5 m dienen.Similar conditions as when monitoring a thin Thread arises when monitoring a rope larger distance, which is also possible. When Example like monitoring a rope of 1 cm Serve diameter from a distance of 5 m.

Die Einstellung des Radarsensors auf die richtige Empfindlichkeit, ist außerordentlich einfach. Es wird keine Absolutmessung durchgeführt, sondern immer eine Lernphase am zu überwachenden Objekt unter Normalbedingungen. Erfaßt wird sowohl eine Schwingung des Fadens, d. h eine Bewegung in Abstrahlungsrichtung, als auch eine Längsbewegung des Fadens in seiner Erstreckungsrichtung. In letzterem Fall ändert der Faden seine Reflexionseigenschaften, wenn er dicker oder dünner wird oder Knoten aufweist. Durch das flexible Teach-in-Verfahren "programmiert" der Sensor sich selbst und danach kann die Überwachung sofort beginnen.The setting of the radar sensor to the correct one Sensitivity is extremely simple. It won't Absolute measurement carried out, but always a learning phase on object to be monitored under normal conditions. Is detected both a vibration of the thread, i.e. h a movement in Direction of radiation, as well as a longitudinal movement of the thread in its direction of extension. In the latter case, the Thread its reflective properties when it is thicker or becomes thinner or has knots. Because of the flexible Teach-in procedure, the sensor "programs" itself and monitoring can then begin immediately.

Claims (4)

1. Vorrichtung zur Fadenüberwachung, insbesondere in der Textiltechnik, gekennzeichnet durch die Verwendung eines Radarsensors.1. Device for thread monitoring, in particular in textile technology, characterized by the use of a radar sensor. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Radarsensor ein im Mikrowellenbereich von etwa 1 bis 100 GHz arbeitendes kohärentes Dauerstrich-Radar (1) und eine gemeinsame Sende/Empfangsantenne (2) umfaßt.2. Device according to claim 1, characterized in that the radar sensor comprises a coherent continuous wave radar ( 1 ) operating in the microwave range of approximately 1 to 100 GHz and a common transmitting / receiving antenna ( 2 ). 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Radarsensor eine Auswerteeinheit umfaßt, welche die rückgestreute Leistung mittels geeigneter Verarbeitungsalgorithmen analysiert und daraus ein in nachgeordneten Schaltanordnungen verwendbares Steuersignal bildet.3. Device according to claim 2, characterized in that the radar sensor comprises an evaluation unit, which the backscattered performance using appropriate Processing algorithms analyzed and an in Subsequent switching arrangements usable control signal forms. 4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Radarsensor in einem Gehäuse (4) angeordnet ist, das einen Schlitz (5) aufweist, wobei der zu überwachende Faden (7) den Schlitz durchsetzt.4. The device according to claim 1, characterized in that the radar sensor is arranged in a housing ( 4 ) which has a slot ( 5 ), wherein the thread to be monitored ( 7 ) passes through the slot.
DE19934332347 1993-09-23 1993-09-23 Device for monitoring thread, especially in textile technology Ceased DE4332347A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19934332347 DE4332347A1 (en) 1993-09-23 1993-09-23 Device for monitoring thread, especially in textile technology
CH261994A CH687756A5 (en) 1993-09-23 1994-08-26 Device for Fadenueberwachung, in particular in the textile art.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19934332347 DE4332347A1 (en) 1993-09-23 1993-09-23 Device for monitoring thread, especially in textile technology

Publications (1)

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DE4332347A1 true DE4332347A1 (en) 1995-03-30

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DE19934332347 Ceased DE4332347A1 (en) 1993-09-23 1993-09-23 Device for monitoring thread, especially in textile technology

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DE (1) DE4332347A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10214955A1 (en) * 2002-04-04 2003-10-16 Rieter Ingolstadt Spinnerei Spinning preparation machine
US7103440B2 (en) 2001-12-11 2006-09-05 Rieter Ingolstadt Spinnereimaschinenbau Ag Use of microwaves for sensors in the spinning industry

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2454828B1 (en) * 1974-11-19 1975-11-06 Siemens Ag Method and device for contactless wire crack monitoring
DE2539438B2 (en) * 1975-09-04 1978-06-01 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Radiation barrier
CH624646A5 (en) * 1976-11-05 1981-08-14 Polygraph Leipzig Arrangement for contactless scanning of moving textile threads
DE3620012A1 (en) * 1986-06-13 1987-12-17 Layh Hans Dieter PHOTOCELL ARRANGEMENT
DE4034333A1 (en) * 1990-05-29 1991-12-05 Grossenhainer Textilmaschinen Contactless monitor for yarn, etc. - has ultrasonic transmitter and receiver flanking material at gap from it for monitoring without being affected by local environment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2454828B1 (en) * 1974-11-19 1975-11-06 Siemens Ag Method and device for contactless wire crack monitoring
DE2539438B2 (en) * 1975-09-04 1978-06-01 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Radiation barrier
CH624646A5 (en) * 1976-11-05 1981-08-14 Polygraph Leipzig Arrangement for contactless scanning of moving textile threads
DE3620012A1 (en) * 1986-06-13 1987-12-17 Layh Hans Dieter PHOTOCELL ARRANGEMENT
DE4034333A1 (en) * 1990-05-29 1991-12-05 Grossenhainer Textilmaschinen Contactless monitor for yarn, etc. - has ultrasonic transmitter and receiver flanking material at gap from it for monitoring without being affected by local environment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7103440B2 (en) 2001-12-11 2006-09-05 Rieter Ingolstadt Spinnereimaschinenbau Ag Use of microwaves for sensors in the spinning industry
DE10214955A1 (en) * 2002-04-04 2003-10-16 Rieter Ingolstadt Spinnerei Spinning preparation machine
US6983516B2 (en) 2002-04-04 2006-01-10 Rieter Ingolstadt Spinnereimaschinenbau Ag Spinning preparation machine
DE10214955B4 (en) * 2002-04-04 2017-04-20 Rieter Ingolstadt Gmbh Spinning preparation machine
DE10214955B9 (en) * 2002-04-04 2017-06-29 Rieter Ingolstadt Gmbh Spinning preparation machine

Also Published As

Publication number Publication date
CH687756A5 (en) 1997-02-14

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