SE7906518L - PROCEDURE TO MEET THE CONTENT OF A SUBSTANCE IN A MIXTURE OF A MULTIPLE SUBJECT (MATERIAL) WHICH MIX IS THE FORM OF A THIN MOVIE, EXAMPLE OF MEASURING THE WATER CONTENT OF PAPER - Google Patents

PROCEDURE TO MEET THE CONTENT OF A SUBSTANCE IN A MIXTURE OF A MULTIPLE SUBJECT (MATERIAL) WHICH MIX IS THE FORM OF A THIN MOVIE, EXAMPLE OF MEASURING THE WATER CONTENT OF PAPER

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Publication number
SE7906518L
SE7906518L SE7906518A SE7906518A SE7906518L SE 7906518 L SE7906518 L SE 7906518L SE 7906518 A SE7906518 A SE 7906518A SE 7906518 A SE7906518 A SE 7906518A SE 7906518 L SE7906518 L SE 7906518L
Authority
SE
Sweden
Prior art keywords
paper
lambda
water
measuring
content
Prior art date
Application number
SE7906518A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE441217B (en
Inventor
P G Mercer
Original Assignee
Lippke Gmbh Co Kg Paul
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 Lippke Gmbh Co Kg Paul filed Critical Lippke Gmbh Co Kg Paul
Publication of SE7906518L publication Critical patent/SE7906518L/en
Publication of SE441217B publication Critical patent/SE441217B/en

Links

Classifications

    • 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
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Paper (AREA)

Abstract

A method using infrared radiation at different wavelengths for the measurement of the content of a first substance (water) in a film 9 (paper web) comprising at least one other substance (wood fibre) is disclosed. A first measuring signal I lambda 1 is obtained at a measuring wavelength lambda 1 absorbed by chemically uncombined water of the paper and a second measuring signal I lambda 2 is obtained at a comparison wavelength lambda 2 substantially not absorbed by water nor by the other substances of the paper. A third measuring signal I lambda 3 is obtained at a second measuring wavelength lambda 3 absorbed by the wood fibre of the paper. Light of the required wavelengths is obtained by a filter wheel 3 in combination with a radiation transmitter 1. The measurement signals I lambda 1, I lambda 2, I lambda 3 are obtained from a detector 8. The weight per unit area Mc of the paper is measured. The water content of the paper is then calculated according to the formula <IMAGE> wherein Mw is the weight per unit area of the water contained in the paper, and aw and ac are respectively the absorption coefficient of water and wood fibre, according to Lambert's Law. A further embodiment using an additional wavelength 4 and a different formula. <IMAGE>
SE7906518A 1979-03-19 1979-08-01 PROCEDURE FOR SOIL-FREE Saturation of the ABSOLUTE CONTENT OF A SUBSTANCE IN A MULTIPLE SUBSTANCE SE441217B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2910673A DE2910673C2 (en) 1979-03-19 1979-03-19 Method for contactless measurement of the absolute content of a substance (secondary substance) in a mixture (main substance and secondary substance) of several substances in the form of a thin film, in particular for measuring the absolute content of water in paper

Publications (2)

Publication Number Publication Date
SE7906518L true SE7906518L (en) 1980-09-20
SE441217B SE441217B (en) 1985-09-16

Family

ID=6065761

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7906518A SE441217B (en) 1979-03-19 1979-08-01 PROCEDURE FOR SOIL-FREE Saturation of the ABSOLUTE CONTENT OF A SUBSTANCE IN A MULTIPLE SUBSTANCE

Country Status (7)

Country Link
BR (1) BR7903020A (en)
DE (1) DE2910673C2 (en)
DK (1) DK114080A (en)
FR (1) FR2452099A1 (en)
GB (1) GB2044443B (en)
NO (1) NO156105C (en)
SE (1) SE441217B (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60620B2 (en) * 1979-05-21 1985-01-09 横河電機株式会社 Method and device for measuring moisture content of paper
FI824185L (en) * 1981-12-07 1983-06-08 Valmet Oy OPTICAL REQUIREMENTS FOR OPTICAL ORGANIZATION FOR MAINTENANCE AV CONSISTENCY AV MASSASUSPENSION
GB8325691D0 (en) * 1983-09-26 1983-10-26 Wiggins Teape Group Ltd Measuring water content
US5778041A (en) * 1983-10-13 1998-07-07 Honeywell-Measurex Corporation System and process for measuring ash in paper
US4577104A (en) * 1984-01-20 1986-03-18 Accuray Corporation Measuring the percentage or fractional moisture content of paper having a variable infrared radiation scattering characteristic and containing a variable amount of a broadband infrared radiation absorber
US4769544A (en) * 1984-06-01 1988-09-06 Measurex Corporation System and process for measuring fiberglass
WO1987002772A1 (en) * 1985-10-22 1987-05-07 Deutsche Forschungs- Und Versuchsanstalt Für Luft- Process and device for measuring concentration
DE3643764A1 (en) * 1986-12-20 1988-06-30 Lippke Gmbh Co Kg Paul METHOD FOR SELECTIVE FILLER MEASUREMENT ON RUNNING MATERIAL SHEETS, IN PARTICULAR PAPER SHEETS
US4928013A (en) * 1987-02-17 1990-05-22 Measurex Corporation Temperature insensitive moisture sensor
US4805623A (en) * 1987-09-04 1989-02-21 Vander Corporation Spectrophotometric method for quantitatively determining the concentration of a dilute component in a light- or other radiation-scattering environment
JPH0648244B2 (en) * 1988-10-25 1994-06-22 横河電機株式会社 Infrared moisture meter that reduces the effect of basis weight
US5014288A (en) * 1989-04-20 1991-05-07 Measurex Corporation X-ray coating weight controller and sensor
CA2038704C (en) * 1990-04-26 1996-01-30 Ryuji Chiba Infrared ray moisture meter
EP0483607B1 (en) * 1990-11-02 1997-04-23 Maschinenfabrik Rieter Ag Method for identifying the quality of a fiber material
US5124552A (en) * 1991-01-28 1992-06-23 Measurex Corporation Sensor and method for measuring web moisture with optimal temperature insensitivity over a wide basis weight range
GB9107815D0 (en) * 1991-04-12 1991-05-29 Servomex Uk Ltd Apparatus and method for improving the performance of a single beam photometer
US5338361A (en) * 1991-11-04 1994-08-16 Measurex Corporation Multiple coat measurement and control apparatus and method
US5276327A (en) * 1991-12-09 1994-01-04 Measurex Corporation Sensor and method for mesaurement of select components of a material
US5399859A (en) * 1993-05-24 1995-03-21 Courtaulds Fibres (Holdings) Limited Flow meter
US5457319A (en) * 1993-06-02 1995-10-10 Alliedsignal Inc. Process for measurement of the degree of cure and percent resin of glass-fiber reinforced epoxy resin prepreg
ATE204989T1 (en) * 1993-06-02 2001-09-15 Isola Laminate Systems Corp METHOD FOR MEASURING THE DEGREE OF CURING AND THE RESIN CONTENT OF A GLASS FIBER REINFORCED EPOXY RESIN PREPREGT
US6229612B1 (en) * 1998-10-12 2001-05-08 The Regents Of The University Of California Paper area density measurement from forward transmitted scattered light
FI115856B (en) * 2000-02-10 2005-07-29 Metso Automation Oy Method and apparatus for measuring coating
GB2365964B (en) * 2000-03-24 2002-07-10 Innogy Ltd Membrane moisture measurement
US7088456B2 (en) * 2004-04-24 2006-08-08 Honeywell International Inc. Thin film thickness measurement using multichannel infrared sensor
FI125721B (en) * 2012-05-25 2016-01-29 Valmet Automation Oy Apparatus and method for measuring an object comprising cellulosic material and at least one dye including printing ink
FI125514B (en) * 2012-05-25 2015-11-13 Valmet Automation Oy Apparatus and method for measuring a web containing cellulose and optionally lignin
CN104390880A (en) * 2014-11-02 2015-03-04 中南林业科技大学 Method for rapidly detecting moisture content of wood

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3405268A (en) * 1965-03-12 1968-10-08 Brun Sensor Systems Inc Radiant energy absorption gage for measuring the weight of a base material and the content of a material sorbed by the base material
US3551678A (en) * 1967-02-13 1970-12-29 Sybron Corp Paper parameter measurement using infrared radiation
DE1934919B2 (en) * 1969-07-10 1971-02-25 Fneseke & Hoepfner GmbH 852OEr langen METHOD AND DEVICE FOR THE CONTACTLESS MEASUREMENT OF THE PERCENTAGE CONCENTRATION OF WATER OR ANY OTHER SUBSTANCE IN MOVING MEASUREMENT TRACKS
US3790796A (en) * 1972-06-05 1974-02-05 Infra Systems Inc Method and apparatus for measurement of sheet opacity
DE2724919C3 (en) * 1977-06-02 1979-12-06 Paul Lippke Gmbh & Co Kg, 5450 Neuwied Method for measuring physical properties of thin bodies with the aid of ultrared radiation, e.g. for thickness measurement or moisture measurement

Also Published As

Publication number Publication date
BR7903020A (en) 1980-11-18
SE441217B (en) 1985-09-16
FR2452099A1 (en) 1980-10-17
GB2044443A (en) 1980-10-15
DE2910673C2 (en) 1985-08-08
NO156105B (en) 1987-04-13
NO800638L (en) 1980-09-22
DK114080A (en) 1980-09-20
NO156105C (en) 1987-08-05
GB2044443B (en) 1983-04-20
FR2452099B1 (en) 1983-07-08
DE2910673A1 (en) 1980-09-25

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