EP2035814A4 - Measuring of water content - Google Patents

Measuring of water content

Info

Publication number
EP2035814A4
EP2035814A4 EP07788757A EP07788757A EP2035814A4 EP 2035814 A4 EP2035814 A4 EP 2035814A4 EP 07788757 A EP07788757 A EP 07788757A EP 07788757 A EP07788757 A EP 07788757A EP 2035814 A4 EP2035814 A4 EP 2035814A4
Authority
EP
European Patent Office
Prior art keywords
measuring
water content
content
water
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Withdrawn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
EP07788757A
Other languages
German (de)
French (fr)
Other versions
EP2035814A1 (en
Inventor
Pekka Jakkula
Mikko Vuolteenaho
Kari Luostarinen
Taavi Hirvonen
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.)
SENFIT Oy
Valmet Technologies Oy
Original Assignee
Metso Paper Oy
SENFIT Oy
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 Metso Paper Oy, SENFIT Oy filed Critical Metso Paper Oy
Publication of EP2035814A1 publication Critical patent/EP2035814A1/en
Publication of EP2035814A4 publication Critical patent/EP2035814A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G01N22/04—Investigating moisture content
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/003—Indicating or regulating the moisture content of the layer
    • 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
    • G01N33/343—Paper pulp
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
EP07788757A 2006-06-22 2007-06-21 Measuring of water content Withdrawn EP2035814A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20065440A FI121556B (en) 2006-06-22 2006-06-22 Water content measurement
PCT/FI2007/050382 WO2007147950A1 (en) 2006-06-22 2007-06-21 Measuring of water content

Publications (2)

Publication Number Publication Date
EP2035814A1 EP2035814A1 (en) 2009-03-18
EP2035814A4 true EP2035814A4 (en) 2009-07-01

Family

ID=36651535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07788757A Withdrawn EP2035814A4 (en) 2006-06-22 2007-06-21 Measuring of water content

Country Status (3)

Country Link
EP (1) EP2035814A4 (en)
FI (1) FI121556B (en)
WO (1) WO2007147950A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000028615A1 (en) * 1998-11-11 2000-05-18 Kildal Antenn Consulting Ab Dielectric waveguide microwave sensor
EP1331476A1 (en) * 2002-01-29 2003-07-30 AMS- Advanced Microwave Systems GmbH Microwave apparatus for moisture measurement, with temperature compensation
EP1437588A1 (en) * 2003-01-10 2004-07-14 AMS- Advanced Microwave Systems GmbH Microwave stray field sensor
DE202005001756U1 (en) * 2004-02-12 2005-05-04 Trützschler GmbH & Co KG Microwave sensor for measuring a dielectric property of a product

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2552954C3 (en) * 1975-11-26 1979-08-16 Bayer Ag, 5090 Leverkusen Device for moisture measurement of spatially extended samples
JPS5639447A (en) * 1979-09-08 1981-04-15 Shinichi Sasaki Device for measuring water content in sheet material
JPH02272349A (en) * 1989-04-14 1990-11-07 Nippon Tokushu Keisokki Seisakusho:Kk Instrument for measuring basis weight and water by microwave
GB9121678D0 (en) * 1991-10-12 1991-11-27 Unaform Ltd Microwave drainage meter
GB2294326A (en) * 1994-10-06 1996-04-24 Scapa Group Plc Moisture detection meter
DE29716639U1 (en) * 1997-09-16 1999-01-21 Tews Elektronik Microwave stray field sensor for moisture and / or density measurement
US7151380B2 (en) * 2004-08-06 2006-12-19 Voith Paper Patent Gmbh Microwave water weight sensor and process
FI119526B (en) * 2005-05-17 2008-12-15 Senfit Oy Method and measuring device for measuring water content

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000028615A1 (en) * 1998-11-11 2000-05-18 Kildal Antenn Consulting Ab Dielectric waveguide microwave sensor
EP1331476A1 (en) * 2002-01-29 2003-07-30 AMS- Advanced Microwave Systems GmbH Microwave apparatus for moisture measurement, with temperature compensation
EP1437588A1 (en) * 2003-01-10 2004-07-14 AMS- Advanced Microwave Systems GmbH Microwave stray field sensor
DE202005001756U1 (en) * 2004-02-12 2005-05-04 Trützschler GmbH & Co KG Microwave sensor for measuring a dielectric property of a product

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FREITAG D W ET AL: "Chapter 4 Forest Industry", INTERNET CITATION, 1998, XP002390327, Retrieved from the Internet <URL:http://www.ms.ornl.gov/programs/energyeff/cfcc/iof/chap4.pdf> [retrieved on 20060713] *
See also references of WO2007147950A1 *

Also Published As

Publication number Publication date
FI20065440A (en) 2007-12-23
FI121556B (en) 2010-12-31
WO2007147950A1 (en) 2007-12-27
FI20065440A0 (en) 2006-06-22
EP2035814A1 (en) 2009-03-18

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20090108

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

A4 Supplementary search report drawn up and despatched

Effective date: 20090604

RIC1 Information provided on ipc code assigned before grant

Ipc: D21F 7/00 20060101ALI20090528BHEP

Ipc: G01N 33/34 20060101ALI20090528BHEP

Ipc: G01N 22/04 20060101AFI20080303BHEP

17Q First examination report despatched

Effective date: 20090911

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100323