EP0201576A1 - Procede de detection du bord d'une bande de materiau. - Google Patents

Procede de detection du bord d'une bande de materiau.

Info

Publication number
EP0201576A1
EP0201576A1 EP85905810A EP85905810A EP0201576A1 EP 0201576 A1 EP0201576 A1 EP 0201576A1 EP 85905810 A EP85905810 A EP 85905810A EP 85905810 A EP85905810 A EP 85905810A EP 0201576 A1 EP0201576 A1 EP 0201576A1
Authority
EP
European Patent Office
Prior art keywords
receiver
transmitter
peak value
material web
packet
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
Application number
EP85905810A
Other languages
German (de)
English (en)
Other versions
EP0201576B1 (fr
EP0201576B2 (fr
Inventor
Hans-Joachim Schrauwen
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.)
ELMEG Elektro Mechanik GmbH
Original Assignee
ELMEG Elektro Mechanik GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6250608&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0201576(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ELMEG Elektro Mechanik GmbH filed Critical ELMEG Elektro Mechanik GmbH
Publication of EP0201576A1 publication Critical patent/EP0201576A1/fr
Publication of EP0201576B1 publication Critical patent/EP0201576B1/fr
Application granted granted Critical
Publication of EP0201576B2 publication Critical patent/EP0201576B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/0204—Sensing transverse register of web
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S367/00—Communications, electrical: acoustic wave systems and devices
    • Y10S367/902—Speed of sound compensation

Definitions

  • the invention relates to a method for detecting the position of the strip edge of a material web by means of an ultrasonic detector which is arranged in the strip edge region and consists of a transmitter and a receiver, the received sound waves being converted into an electrical signal.
  • a pneumatic web edge sensor is used, which essentially consists of two nozzles arranged one above the other, namely the transmitter nozzle and the receiver nozzle, which are arranged in the area of the material web near the edge .
  • the receiver pressure changes depending on the position of the material web and acts on a membrane drive, which in turn directs a liquid flow proportional to the receiver pressure to an actuator, which is usually designed as a control roller or an adjustable reel.
  • the hydraulic amplification is often not sufficient to be able to adjust the response sensitivity of the control device in accordance with the technical requirements.
  • the response sensitivity can only be increased by increasing the receiver pressure by increasing the transmitter pressure.
  • the invention is based on the object of developing the method defined at the outset for detecting the position of a sand edge in such a way that undesired reflected waves certainly do not have any influence on the measurement result.
  • the transmitter emits individual pulses or wave packets offset in time with respect to one another, in that the wave packet or individual pulse received by the receiver is converted into a corresponding electrical oscillation packet, in that a limited area of the vibration packet is scanned and the Sample is stored for further processing.
  • the peak value that is determined in the sampling period of the oscillation packet area can be used particularly advantageously as the sample value.
  • the method thus works in such a way that a wave packet from the ultrasound transmitter emitted and received by the receiver and converted into an electrical oscillation packet signal. Instead of a wave packet, individual pulses can also be used. Since the unwanted reflection rays only reach the receiver at a later point in time, by evaluating or scanning the first area of the oscillation packet, in which no undesired superimpositions yet occur, a measured value can be obtained that represents the position of the strip edge with great accuracy. If you limit the scanning range to a maximum of three to five periods, calculated from the beginning of the oscillation packet, the interference reflections will certainly be eliminated. The whole process is repeated cyclically and thus enables the material web to be continuously checked or monitored.
  • One arrangement for carrying out the method is that the transmitter is fed by a pulse train generator, that an activatable peak rectifier is connected to the receiver that emits an electrical signal, and that an activatable transmission circuit is connected downstream for transmitting the peak value to a memory.
  • a sequence control is provided which is acted upon by a pulse generator.
  • the same pulses are also fed to the pulse train generator.
  • the sequence control then ensures that a predetermined pulse sequence is sent out by the generator and the peak value rectifier is activated at a specific point in time for a specific sampling period, the peak value determined subsequently being fed to a memory via a transmission circuit.
  • the measurement can take place both in reflection and in the direct transmission method.
  • the transmitter and receiver are arranged on the same side of the material web at a certain angle, the beam reflected on the material web forming the measuring beam.
  • an ultrasonic transducer can alternately be used as a transmitter and receiver in a known manner.
  • the transmitter is on one side and the receiver on the other side of the material web, sound waves of different energy reaching the receiver depending on the degree of coverage of the beam by the web.
  • Fig. 3 is a flow chart to explain the Verfa ensa run.
  • Fig. 1, 1 schematically indicates the material web which is guided over rollers, not shown.
  • the transmitter 2 is located above the material web, while the receiver 3 is arranged below the material web.
  • the transmitter and receiver are arranged in the edge area of the material web, so that the sound beam is partially covered by the material web. Depending on the degree of coverage, more or less sound energy reaches the receiver, which represents a measure of the position of the strip edge or the material web.
  • the reflection method not shown, can also be used.
  • the transmitter and receiver are arranged at a suitable angle on one side of the material web.
  • the sound beam emitted by the transmitter is reflected on the material web and then reaches the receiver.
  • rays reflected at other points also enter the receiver, which amplify or weaken the measuring beam and thus lead to a falsification of the measurement result.
  • the material web 1, the transmitter 2 and the receiver 3 are again shown schematically.
  • the ultrasonic transmitter 2 is fed by an impulse sequence generator 4, which emits a specific impulse sequence of a predetermined repetition frequency.
  • an impulse sequence generator 4 which emits a specific impulse sequence of a predetermined repetition frequency.
  • the method can also be carried out with individual pulses.
  • a pulse generator is used instead of the pulse train generator 4.
  • This electrical pulse sequence is converted in the transmitter into a wave packet, emitted and received as a wave packet from the receiver, the energy received being determined by the degree of coverage of the beam by the material web.
  • the sound waves are converted directly into electrical signals in the receiver, if necessary amplified in an amplifier 5 and then fed to an activatable scanning device 6.
  • the scanning device 6 has a switch 7 which supplies the signals emitted by the amplifier 5 to the peak value rectifier 8.
  • the peak rectifier 8 consists, for example, of the interconnection of a diode with a capacitor, as is symbolically shown.
  • the switch 7 is opened and the value held in the peak value rectifier is fed to a memory circuit 9 by means of a transmission circuit 9.
  • the transmission circuit 9 can consist, for example, of a switch 1 and a capacitor 10.
  • the switch 1 When the switch 1 is closed, the charge is transferred from the peak value rectifier to the capacitor 10 and then fed to a memory (not shown) for further processing.
  • Fig. 3 used.
  • the discharge control is acted upon by a pulse generator 13, which simultaneously delivers pulses to the pulse train generator 4 l.
  • the sequence control closes switch 14 and activates the pulse train generator, which for example emits a pulse train with three pulses. Accordingly, the transmitter 2 emits a wel lencou with the same period.
  • the switch 14 is opened via the sequence control 12 and the switch 7 is closed.
  • the time difference T2 - T1 corresponds approximately to the running time of the sound waves from the transmitter to the receiver.
  • the switch 7 remains closed so long that approximately three periods are detected by the scanning circuit 6.
  • switch 7 opens and the peak value rectifier maintains the peak value that occurs in the time range T3-T2.
  • switch 1 1 is closed and the peak value is transferred to a memory 10.
  • the peak rectifier is then reset to zero and the cycle begins again. In this way it is ensured that only the measurement signal is detected during the scanning period and that no disturbing reflections which would occur at a later point in time influence the measurement value.

Landscapes

  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

Dans un procédé de détection du bord d'une bande de matériau (1) à l'aide d'un détecteur d'ultra-sons composé d'un émetteur (2) et d'un récepteur (3) et agencé dans la région du bord de la bande de matériau, les ondes sonores reçues sont converties en un signal électrique. Afin d'éliminer de manière fiable l'influence d'ondes réfléchies sur le résultat des mesures, l'émetteur (2) envoie des impulsions isolées ou des séries d'impulsions décalées dans le temps. Les séries d'impulsions (ou impulsions isolées) reçues par le récepteur (3) sont converties en une série correspondante de vibrations électriques, une partie limitée de la série de vibrations est analysée et la valeur d'analyse est enregistrée pour être ultérieurement traitée. Un dispositif servant à appliquer le procédé comprend un émetteur (2) alimenté par un générateur d'impulsions (4), un redresseur (6) de valeur de crête connecté à la suite du récepteur (3), qui fournit un signal électrique, et un circuit de transmission (9) susceptible d'être activé, connecté à la suite du redresseur de valeur de crête (6) pour transmettre la valeur de crête à une mémoire (10).
EP85905810A 1984-11-17 1985-11-09 Procede de detection du bord d'une bande de materiau Expired - Lifetime EP0201576B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3442154 1984-11-17
DE19843442154 DE3442154A1 (de) 1984-11-17 1984-11-17 Verfahren zur positionserfassung der bandkante einer materialbahn
PCT/EP1985/000598 WO1986002913A1 (fr) 1984-11-17 1985-11-09 Procede de detection du bord d'une bande de materiau

Publications (3)

Publication Number Publication Date
EP0201576A1 true EP0201576A1 (fr) 1986-11-20
EP0201576B1 EP0201576B1 (fr) 1989-01-18
EP0201576B2 EP0201576B2 (fr) 1994-05-04

Family

ID=6250608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85905810A Expired - Lifetime EP0201576B2 (fr) 1984-11-17 1985-11-09 Procede de detection du bord d'une bande de materiau

Country Status (5)

Country Link
US (1) US4901292A (fr)
EP (1) EP0201576B2 (fr)
JP (1) JPH06105172B2 (fr)
DE (2) DE3442154A1 (fr)
WO (1) WO1986002913A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6175419B1 (en) 1999-03-24 2001-01-16 Fife Corporation Light sensor for web-guiding apparatus
US6289729B1 (en) 1998-12-28 2001-09-18 Fife Corporation Ultrasonic sensor for web-guiding apparatus
WO2011017816A3 (fr) * 2009-08-14 2011-04-07 Maschinenfabrik Rieter Ag Surveillance et commande du guidage d'une courroie sur un dispositif d'enroulement

Families Citing this family (23)

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Publication number Priority date Publication date Assignee Title
DE3913601A1 (de) * 1989-04-25 1990-10-31 Dornier Gmbh Lindauer Bandsteuerung fuer einen siebbandtrockner
US5072414A (en) * 1989-07-31 1991-12-10 Accuweb, Inc. Ultrasonic web edge detection method and apparatus
US5274573A (en) * 1989-07-31 1993-12-28 Accuweb, Inc. Ultrasonic web edge detection method and apparatus
DE9000783U1 (de) * 1990-01-24 1990-03-29 Schwark, Hans-Friedrich, Dr. Ing., 8000 München Abtastvorrichtung zum Abtasten der Kante einer Materialbahn
US4963807A (en) * 1990-02-06 1990-10-16 Zip-Pak Incorporated Ultrasonic web edge guide circuit
FR2684362A1 (fr) * 1991-12-02 1993-06-04 Siderurgie Fse Inst Rech Procede de controle et de reglage du centrage d'une bande en defilement continu dans une installation et dispositif et rouleau de controle de centrage.
DE4208294C2 (de) * 1992-03-16 1995-01-26 Honeywell Regelsysteme Gmbh Verfahren zur Ultraschall-Detektion
US5583828A (en) * 1994-04-05 1996-12-10 Nireco Corporation Method and apparatus for detection of edge position thickness or splice position of a material web
US5565627A (en) * 1994-10-11 1996-10-15 Xecutek Corporation Ultrasonic edge detector and control system
DE19500822C1 (de) * 1995-01-13 1996-03-21 Erhardt & Leimer Gmbh Ultraschall-Kantenfühler zur Erfassung der Bahnkante einer Warenbahn
DE19839287C5 (de) * 1998-08-28 2008-02-14 Siemens Ag Verfahren und Einrichtung zur Bestimmung der Position der Kante eines Metallbandes
DE19839286B4 (de) 1998-08-28 2004-12-02 Siemens Ag Verfahren und Einrichtung zur Messung der Zugspannungsverteilung in einem Metallband
DE19905331A1 (de) * 1999-02-09 2000-04-20 Siemens Ag Verfahren und Einrichtung zur Überwachung der seitlichen Position laufender Bänder
DE10337673B3 (de) * 2003-08-16 2005-04-28 Erhardt & Leimer Gmbh Verfahren und Vorrichtung zum Erfassen der Lage einer Kante einer laufenden Warenbahn
FI118274B (fi) * 2004-02-05 2007-09-14 Metso Paper Inc Menetelmä ja laitteisto rainan tai kudoksen reunan sivuttaissuuntaisen sijainnin määrittämiseksi rainanmuodostuskoneessa
US7415881B2 (en) * 2004-08-19 2008-08-26 Fife Corporation Ultrasonic sensor system for web-guiding apparatus
DE102006029139A1 (de) 2006-06-22 2007-12-27 Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH Meßvorrichtung zur Bestimmung der Bandkantenlage, der Bandbreite und/oder der Zugspannungsverteilung über die Bandbreite eines Bandes
EP2186624B1 (fr) * 2008-11-18 2015-08-26 Tetra Laval Holdings & Finance S.A. Appareil et procédé de détection de la position d'application d'une bande d'étanchéité sur une bande de matériau d'emballage pour produits alimentaires
JP5119496B2 (ja) * 2008-12-12 2013-01-16 竹中電子工業株式会社 超音波エッジセンサ
DE202011002054U1 (de) 2011-01-28 2011-05-26 Texmag Gmbh Vertriebsgesellschaft Ultraschall-Kantensensor
DE202012004305U1 (de) * 2012-04-27 2012-05-25 Texmag Gmbh Vertriebsgesellschaft Vorrichtung zum Detektieren einer Kante einer Materialbahn
CN103264919A (zh) * 2013-05-10 2013-08-28 奇瑞汽车股份有限公司 一种卷材纠偏控制系统
DE202016008273U1 (de) 2016-02-08 2017-06-09 Asinco GmbH Einrichtung zum Messen der Breite eines durch Bandwalzen erzeugten Metallbandes

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US3225988A (en) * 1963-08-07 1965-12-28 Koppers Co Inc Ultrasonic web position detector and aligning means
US3570624A (en) * 1966-06-27 1971-03-16 Lummus Co Web tracking and control
US3739177A (en) * 1970-12-15 1973-06-12 North American Mfg Co Light sensitive control
US3792613A (en) * 1972-05-19 1974-02-19 Krautkramer Branson Pulse-echo ultrasonic test apparatus with cathode ray tube digital display
CH589277A5 (fr) * 1973-11-26 1977-06-30 Western Electric Co
JPS5373161A (en) * 1976-12-13 1978-06-29 Toshiba Corp Ultrasonic type position detector
DE2726981C2 (de) * 1977-06-15 1984-11-22 Fried. Krupp Gmbh, 4300 Essen Vorrichtung zur Zeitmessung zwischen Impulsen
DE2730733C2 (de) * 1977-07-07 1985-01-03 Elektro-Mechanik Gmbh, 5963 Wenden Anordnung zur Bahnkanten- oder Bahnmittenregelung
FR2430020A1 (fr) * 1978-06-28 1980-01-25 Petroles Cie Francaise Procede de mesure automatique d'une distance dans l'eau par emissions et receptions controlees d'ultra-sons
US4221004A (en) * 1978-08-03 1980-09-02 Robertshaw Controls Company Adjustable ultrasonic level measurement device
US4247922A (en) * 1978-10-12 1981-01-27 Harris Corporation Object position and condition detection system
JPS55143475A (en) * 1979-04-27 1980-11-08 Oki Electric Ind Co Ltd Ultrasonic distance measuring instrument
DE3029444A1 (de) * 1980-08-02 1982-02-25 Heribert Dipl.-Ing. 7517 Waldbronn Ballhaus Oberflaechenabtastgeraet
US4470307A (en) * 1982-06-24 1984-09-11 Aluminum Company Of America Sonic system inspection control
DE3242284A1 (de) * 1982-11-16 1984-05-17 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und anordnung zur laufzeitbestimmung eines ultraschallimpulses

Non-Patent Citations (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6289729B1 (en) 1998-12-28 2001-09-18 Fife Corporation Ultrasonic sensor for web-guiding apparatus
US6175419B1 (en) 1999-03-24 2001-01-16 Fife Corporation Light sensor for web-guiding apparatus
US6323948B2 (en) 1999-03-24 2001-11-27 Fife Corporation Light sensor for web-guiding apparatus
WO2011017816A3 (fr) * 2009-08-14 2011-04-07 Maschinenfabrik Rieter Ag Surveillance et commande du guidage d'une courroie sur un dispositif d'enroulement

Also Published As

Publication number Publication date
DE3442154A1 (de) 1986-05-28
JPS62501520A (ja) 1987-06-18
US4901292A (en) 1990-02-13
JPH06105172B2 (ja) 1994-12-21
EP0201576B1 (fr) 1989-01-18
DE3567618D1 (en) 1989-02-23
WO1986002913A1 (fr) 1986-05-22
EP0201576B2 (fr) 1994-05-04
DE3442154C2 (fr) 1989-08-31

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