EP0201576B2 - Verfahren zur positionserfassung der bandkante einer materialbahn - Google Patents

Verfahren zur positionserfassung der bandkante einer materialbahn Download PDF

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Publication number
EP0201576B2
EP0201576B2 EP85905810A EP85905810A EP0201576B2 EP 0201576 B2 EP0201576 B2 EP 0201576B2 EP 85905810 A EP85905810 A EP 85905810A EP 85905810 A EP85905810 A EP 85905810A EP 0201576 B2 EP0201576 B2 EP 0201576B2
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EP
European Patent Office
Prior art keywords
receiver
transmitter
instant
packet
time span
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.)
Expired - Lifetime
Application number
EP85905810A
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German (de)
English (en)
French (fr)
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EP0201576B1 (de
EP0201576A1 (de
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
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Publication date
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Application filed by ELMEG Elektro Mechanik GmbH filed Critical ELMEG Elektro Mechanik GmbH
Publication of EP0201576A1 publication Critical patent/EP0201576A1/de
Publication of EP0201576B1 publication Critical patent/EP0201576B1/de
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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 ultrasound detector arranged in the strip edge region and consisting of a transmitter and a receiver, the transmitter emitting individual pulses or wave packets consisting of individual pulses at a predetermined first time and the receiver emitting the individual pulse or that Wave packet receives and converted into an electrical signal or vibration packet.
  • the object of the invention is to further develop the above-mentioned and initially defined method for position detection of a strip edge in such a way that undesired reflecting waves certainly do not have any influence on the measurement result.
  • the object is achieved in that a predetermined sampling time period for the individual pulses received or the oscillation packet begins at a second point in time, which is after the first point in time by a period of time that is approximately equal to the transit time of the sound waves between the transmitter and the receiver individual pulses received in the sampling period or the oscillation packet are stored at a later point in time, the period between the end of the sampling period and the first point in time being shorter than a period which requires a reflection signal which originates from a signal which is emitted by the transmitter at the first point in time was emitted and reached the receiver via a detour, and that the pause time until the next individual pulse or wave packet was emitted is so long that the reflection interference signals of the previous individual pulse or wave packet have decayed.
  • the peak value that is determined in the sampling period of the oscillation range can be used particularly advantageously as the sample value.
  • the method thus works in such a way that a wave packet is first emitted by the ultrasound transmitter and received by the receiver, and converted into an electrical oscillation packet signal, and this when the scanning is not activated. Instead of a wave packet, individual pulses can also be used. Since the undesired 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 band 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 continuous monitoring or monitoring of the material web.
  • 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 be used alternately 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, with sound waves of different energy reaching the receiver depending on the degree of coverage of the beam by the web.
  • 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 band 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 ultrasound transmitter 2 is fed by a pulse sequence generator 4, which emits a specific pulse sequence of a predetermined sequence frequency.
  • a pulse generator is used instead of the pulse train generator 4.
  • This electrical pulse sequence is converted in the transmitter into a sound wave packet, emitted and received as a sound wave packet by 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, possibly 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 value rectifier 8 consists, for example, of the interconnection of a diode with a capacitor, as is shown symbolically. After the end of the sampling period, the switch 7 is opened and the value held in the peak value rectifier is fed to a memory by means of a transmission circuit 9.
  • the transition circuit 9 can consist, for example, of a switch 11 and a capacitor 10. By closing the switch 11, the charge is transferred from the peak value rectifier to the capacitor 10 and then fed via line 15 to a memory, not shown, for further processing.
  • the sequence control is acted upon by a pulse generator 13, which simultaneously delivers pulses to the pulse train generator 4.
  • the sequence control closes the switch 14 and activates the pulse train generator, which for example emits a pulse train with three pulses.
  • the transmitter 2 emits a wave packet with the same period.
  • the switch 14 is opened and the switch 7 is closed via the sequence control 12.
  • the time difference T2-T1 corresponds approximately to the transit 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 11 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. This ensures that only the measurement signal is recorded during the sampling period and that no disturbing reflections that 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)
EP85905810A 1984-11-17 1985-11-09 Verfahren zur positionserfassung der bandkante einer materialbahn Expired - Lifetime EP0201576B2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19843442154 DE3442154A1 (de) 1984-11-17 1984-11-17 Verfahren zur positionserfassung der bandkante einer materialbahn
DE3442154 1984-11-17
PCT/EP1985/000598 WO1986002913A1 (en) 1984-11-17 1985-11-09 Method for detecting the position of the band edge of a material sheet

Publications (3)

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

Family

ID=6250608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85905810A Expired - Lifetime EP0201576B2 (de) 1984-11-17 1985-11-09 Verfahren zur positionserfassung der bandkante einer materialbahn

Country Status (5)

Country Link
US (1) US4901292A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
EP (1) EP0201576B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPH06105172B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (2) DE3442154A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
WO (1) WO1986002913A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102471949A (zh) * 2009-08-14 2012-05-23 里特机械公司 在卷绕装置中监测和控制皮带导向机构

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3913601A1 (de) * 1989-04-25 1990-10-31 Dornier Gmbh Lindauer Bandsteuerung fuer einen siebbandtrockner
US5274573A (en) * 1989-07-31 1993-12-28 Accuweb, Inc. Ultrasonic web edge detection method and apparatus
US5072414A (en) * 1989-07-31 1991-12-10 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
DE19839286B4 (de) 1998-08-28 2004-12-02 Siemens Ag Verfahren und Einrichtung zur Messung der Zugspannungsverteilung in einem Metallband
DE19839287C5 (de) * 1998-08-28 2008-02-14 Siemens Ag Verfahren und Einrichtung zur Bestimmung der Position der Kante eines Metallbandes
US6289729B1 (en) 1998-12-28 2001-09-18 Fife Corporation Ultrasonic sensor for web-guiding apparatus
DE19905331A1 (de) * 1999-02-09 2000-04-20 Siemens Ag Verfahren und Einrichtung zur Überwachung der seitlichen Position laufender Bänder
US6175419B1 (en) 1999-03-24 2001-01-16 Fife Corporation Light sensor for web-guiding apparatus
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 (en) * 2008-11-18 2015-08-26 Tetra Laval Holdings & Finance S.A. Apparatus and method for detecting the position of application of a sealing strip onto a web of packaging material for food products
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
US3929006A (en) * 1973-11-26 1975-12-30 Western Electric Co Measuring article thickness ultrasonically
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102471949A (zh) * 2009-08-14 2012-05-23 里特机械公司 在卷绕装置中监测和控制皮带导向机构

Also Published As

Publication number Publication date
US4901292A (en) 1990-02-13
DE3442154C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-08-31
EP0201576B1 (de) 1989-01-18
JPS62501520A (ja) 1987-06-18
DE3442154A1 (de) 1986-05-28
EP0201576A1 (de) 1986-11-20
DE3567618D1 (en) 1989-02-23
WO1986002913A1 (en) 1986-05-22
JPH06105172B2 (ja) 1994-12-21

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