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DE19908932A1 - System to measure the weight of paper and fabrics etc. - Google Patents

System to measure the weight of paper and fabrics etc.

Info

Publication number
DE19908932A1
DE19908932A1 DE1999108932 DE19908932A DE19908932A1 DE 19908932 A1 DE19908932 A1 DE 19908932A1 DE 1999108932 DE1999108932 DE 1999108932 DE 19908932 A DE19908932 A DE 19908932A DE 19908932 A1 DE19908932 A1 DE 19908932A1
Authority
DE
Germany
Prior art keywords
sound
basis weight
determining
weight
automatic device
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Withdrawn
Application number
DE1999108932
Other languages
German (de)
Inventor
Erich Ludwig
Heiner Beckwilm
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.)
JUEKE MECHANISCHE und ELEKTRON
Original Assignee
JUEKE MECHANISCHE und ELEKTRON
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 JUEKE MECHANISCHE und ELEKTRON filed Critical JUEKE MECHANISCHE und ELEKTRON
Priority to DE1999108932 priority Critical patent/DE19908932A1/en
Publication of DE19908932A1 publication Critical patent/DE19908932A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G17/00—Apparatus for or methods of weighing material of special form or property
    • G01G17/02—Apparatus for or methods of weighing material of special form or property for weighing material of filamentary or sheet form
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G9/00—Methods of, or apparatus for, the determination of weight, not provided for in groups G01G1/00 - G01G7/00
    • G01G9/005—Methods of, or apparatus for, the determination of weight, not provided for in groups G01G1/00 - G01G7/00 using radiations, e.g. radioactive
    • 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
    • G01N33/34—Paper
    • G01N33/346—Paper sheets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/24—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing the transmission of wave or particle radiation through the material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/023—Solids
    • G01N2291/0237—Thin materials, e.g. paper, membranes, thin films
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/02818—Density, viscosity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/10—Number of transducers
    • G01N2291/105—Number of transducers two or more emitters, two or more receivers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Toxicology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The apparatus to give an automatic weighing action, to determine the weight of materials, has a transmitter to deliver acoustic waves. The waves pass through the material under test, and the acoustic power is measured at a receiver, to be taken as a measure of the material weight. The acoustic transmitter (2) and receiver (1) operate through a crystal electric effect. A number of acoustic transmitter and facing receiver pairs are deployed next to each other, to give a number of measurement points. The material (3) to be measured is passed between the transmitters and receivers, so that all or part of the material is measured for its weight.

Description

Bei der Herstellung und Verarbeitung von Materialbahnen aus Papier, Geweben, Vliesstoffen, Folien und dergleichen ist die stichprobenartige und fortlaufende Bestimmung des Flächengewichts von besonderer Bedeutung. Ziel ist hierbei die Vermeidung oder Erkennung von Fertigungstoleranzen vor beziehungsweise nach dem Fertigungsprozeß. Angestrebt wird die Herstellung und Verarbeitung von Bahnen annähernd einheitlichen Flächengewichts. Darüber hinaus ist im Sinne der Qualitätssicherung eine Erkennung örtlicher begrenzter Abweichungen, Löcher oder Verdichtungen, im laufenden Fertigungsprozeß anzustreben.In the manufacture and processing of webs of paper, fabrics, Nonwovens, foils and the like is the random and continuous Determination of the basis weight of particular importance. The goal here is Prevention or detection of manufacturing tolerances before or after the manufacturing process. The aim is to manufacture and process Paths of approximately uniform basis weight. In addition, in the sense of Quality assurance a detection of localized deviations, holes or densifications to strive for in the ongoing manufacturing process.

Zur Steuerung von Maschinen ist daher ist eine Vorrichtung erforderlich, die diese Aufgabe bei einfachem Aufbau sicher und selbsttätig erfüllt.A device is therefore required to control machines fulfills this task safely and automatically with a simple structure.

Diese Aufgaben werden gegenwärtig dadurch gelöst, daß die zu prüfende Materialbahn in Proben bekannter Fläche getrennt und ausgewogen werden. Weiter ist bekannt, daß Infrarotstrahlen, Betastrahlen oder Röntgenstrahlen beim Durchgang durch die Proben in ihrer Strahlleistung in Abhängigkeit vom Flächengewicht abgeschwächt werden.These tasks are currently solved by the fact that the to be examined Material web in samples of known area are separated and balanced. It is also known that infrared rays, beta rays or X-rays when Passage through the samples in their beam power as a function of Basis weight can be weakened.

Darüber hinaus ist bekannt, daß insbesondere bei Vliesstoffen eine Abschätzung des Flächengewichts durch Abtasten mit den Fingern möglich ist.In addition, it is known that, especially in the case of nonwovens, an estimate the basis weight is possible by scanning with the fingers.

Alle Vorrichtungen, die mit Betastrahlen oder Röntgenstrahlen arbeiten, haben den Nachteil, daß bei ihrer Anwendung umfangreiche Sicherheitsvorkehrungen erforderlich sind und derartige Meßeinrichtungen sehr aufwendig und teuer sind. Die Abschwächung von Infrarotlicht bestimmter Wellenlängen beim Durchtrift durch die Probe ist nur dann ein Maß für das Flächengewicht, wenn die Probe farblich eine gleichförmige Zusammensetzung hat. Dies ist oft nicht der Fall, insbesondere, wenn der Rohstoff, aus dem die Materialbahn hergestellt wird, aus Reststoffen gewonnen wurde.All devices that work with beta rays or x-rays have the disadvantage that extensive security precautions when used are required and such measuring devices are very complex and expensive. The attenuation of infrared light of certain wavelengths when passing through through the sample is only a measure of the basis weight if the sample has a uniform color composition. This is often not the case especially if the raw material from which the material web is made is made of Residues was obtained.

Obwohl die Methode, Vliesstoffe mit den Fingern abzutasten, bei der Qualitätssicherung gute Ergebnisse liefert, erfordert sie viel Erfahrung und Fingerspitzengefühl und ist damit auf einen kleinen Personenkreis beschränkt. Die vorgestellte Vorrichtung löst das Problem erfindungsgemäß, indem die von einer in einer Reihe angeordneten Anzahl von Schallsendern (2), vorzugsweise kristallelektrische Schallumsetzer, abgegebenen Schallwellen nach Durchdringung des zu prüfenden Materials (3) durch eine ebenso große Anzahl von jeweils gegenüberliegenden Schallempfängern (1) aufgenommen werden. Die durch den Durchgang eingetretene Leistungsverringerung ist abhängig vom zu ermittelnden Flächengewicht. Die auf den Schallempfänger, vorzugsweise einen kristallelektrischen Schallumsetzer, auftreffenden Schallwellen werden von diesem in elektrische Spannungen umgesetzt, die von einer nachfolgend angeordneten Auswertungsschaltung aufbereitet werden. Although the method of touching nonwovens with your fingers gives good results in quality assurance, it requires a lot of experience and sensitivity and is therefore limited to a small group of people. The device presented solves the problem according to the invention in that the sound waves emitted by a number of sound transmitters ( 2 ), preferably crystal-electric sound converters, arranged in a row after penetration of the material to be tested ( 3 ) by an equally large number of respectively opposite sound receivers ( 1 ) be included. The reduction in performance caused by the passage depends on the basis weight to be determined. The sound waves striking the sound receiver, preferably a crystal-electric sound converter, are converted by the latter into electrical voltages which are processed by an evaluation circuit arranged downstream.

Aus den so aufbereiteten Signalen werden mit Hilfe eines Kleinrechners die entsprechenden Flächengewichte errechnet. Auf diese Weise entsteht durch die Vorbeiführung des Materials an der Aufnehmerreihe ein flächengewichtsabhängiges Muster.With the help of a small computer, the signals processed in this way are converted into corresponding basis weights are calculated. In this way, the Feed the material past the sensor row basis weight-dependent pattern.

Ein solches Muster kann auf einem grafischen Datensichtgerät dargestellt werden, wobei die Darstellung der Flächengewichte beispielsweise durch farbliche Abstufung erfolgen kann (Falschfarbendarstellung).Such a pattern can be displayed on a graphic visual display device, the representation of the basis weights, for example, by color Gradation can take place (false color representation).

Claims (5)

1. Selbsttätige Vorrichtung zur Bestimmung des Flächengewichts von Papier, Geweben, Vliesstoffen, Folien und dergleichen, dadurch gekennzeichnet, daß ein Schallsender Schallwellen aussendet, diese durch die zu prüfende Materialbahn gesendet werden und ihre Schalleistung mit einem Schallempfänger gemessen und als Maß für das Flächengewicht der Materialbahn genommen wird.1. Automatic device for determining the basis weight of paper, fabrics, nonwovens, foils and the like, characterized in that a sound transmitter emits sound waves, these are sent through the material web to be tested and their sound power measured with a sound receiver and as a measure of the basis weight of the Material web is taken. 2. Selbsttätige Vorrichtung zur Bestimmung des Flächengewichts nach dem Anspruch 1, dadurch gekennzeichnet, daß der Schallsender nach dem kristallelektrischen Effekt arbeitet.2. Automatic device for determining the basis weight after Claim 1 characterized, that the sound transmitter works according to the crystal-electric effect. 3. Selbsttätige Vorrichtung zur Bestimmung des Flächengewichts nach dem Anspruch 1, dadurch gekennzeichnet, daß der Schallempfänger nach dem kristallelektrischen Effekt arbeitet.3. Automatic device for determining the basis weight after Claim 1 characterized, that the sound receiver works according to the crystal-electric effect. 4. Selbsttätige Vorrichtung zur Bestimmung des Flächengewichts nach den Ansprüchen 1, 2 und 3, dadurch gekennzeichnet, daß die Schallsender und -empfänger paarweise gegenüberliegend mehrfach nebeneinander angeordnet sind und so gleichzeitig eine Vielzahl von Meßpunkten erfassen.4. Automatic device for determining the basis weight according to the Claims 1, 2 and 3, characterized, that the sound transmitters and receivers in pairs opposite each other several times are arranged side by side and so a variety of Record measuring points. 5. Selbsttätige Vorrichtung zur Bestimmung des Flächengewichts nach den Ansprüchen 1, 2, 3 und 4, dadurch gekennzeichnet, daß die zu prüfende Materialbahn zwischen den Schallsendern und Schallempfängern hindurchbewegt wird und so die gesamte Materialbahn oder ein Anteil von gemessen wird.5. Automatic device for determining the basis weight according to the Claims 1, 2, 3 and 4, characterized, that the material web to be tested between the sound transmitters and Sound receivers is moved through and so the entire web or a portion of is measured.
DE1999108932 1999-03-02 1999-03-02 System to measure the weight of paper and fabrics etc. Withdrawn DE19908932A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1999108932 DE19908932A1 (en) 1999-03-02 1999-03-02 System to measure the weight of paper and fabrics etc.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1999108932 DE19908932A1 (en) 1999-03-02 1999-03-02 System to measure the weight of paper and fabrics etc.

Publications (1)

Publication Number Publication Date
DE19908932A1 true DE19908932A1 (en) 1999-12-09

Family

ID=7899337

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1999108932 Withdrawn DE19908932A1 (en) 1999-03-02 1999-03-02 System to measure the weight of paper and fabrics etc.

Country Status (1)

Country Link
DE (1) DE19908932A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005082179A1 (en) * 2004-02-27 2005-09-09 Hauni Maschinenbau Ag Glue quantity determination
EP1849370A1 (en) 2006-04-25 2007-10-31 Hauni Maschinenbau AG Monitoring the position of a band of tipping paper
JP2012154744A (en) * 2011-01-25 2012-08-16 Toyota Motor Corp Ultrasonic measuring method, and ultrasonic measuring instrument
DE102012006184A1 (en) 2011-03-28 2012-10-04 Helmut Knorr Ultrasonic transmitting and receiving device for thickness and / or basis weight measurement
EP3163539B1 (en) 2014-06-30 2019-02-20 GRG Banking Equipment Co., Ltd. Thickness detection device
DE202023001240U1 (en) * 2023-06-07 2024-09-12 matchpoint - Textilmaschinenbau Deutschland GmbH Elements and devices for an in-situ measuring method for the objective assessment of the surface finishing of textiles

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005082179A1 (en) * 2004-02-27 2005-09-09 Hauni Maschinenbau Ag Glue quantity determination
EP1849370A1 (en) 2006-04-25 2007-10-31 Hauni Maschinenbau AG Monitoring the position of a band of tipping paper
EP1849370B1 (en) * 2006-04-25 2011-06-08 Hauni Maschinenbau AG Monitoring the position of a band of tipping paper
JP2012154744A (en) * 2011-01-25 2012-08-16 Toyota Motor Corp Ultrasonic measuring method, and ultrasonic measuring instrument
DE102012006184A1 (en) 2011-03-28 2012-10-04 Helmut Knorr Ultrasonic transmitting and receiving device for thickness and / or basis weight measurement
US8904874B2 (en) 2011-03-28 2014-12-09 Helmut Knorr Ultrasonic transmitting and receiving device for thickness and/or grammage measurement
DE102012006184B4 (en) * 2011-03-28 2025-05-15 MeSys GmbH Meß- und Regelsysteme für Industrieautomation Ultrasonic transmitting and receiving device for thickness and/or basis weight measurement
EP3163539B1 (en) 2014-06-30 2019-02-20 GRG Banking Equipment Co., Ltd. Thickness detection device
DE202023001240U1 (en) * 2023-06-07 2024-09-12 matchpoint - Textilmaschinenbau Deutschland GmbH Elements and devices for an in-situ measuring method for the objective assessment of the surface finishing of textiles

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Legal Events

Date Code Title Description
OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OP8 Request for examination as to paragraph 44 patent law
8130 Withdrawal