FI65673B - Foerfarande och anordning foer detektering av kvistar eller dyikt i saogat virke - Google Patents

Foerfarande och anordning foer detektering av kvistar eller dyikt i saogat virke

Info

Publication number
FI65673B
FI65673B FI823151A FI823151A FI65673B FI 65673 B FI65673 B FI 65673B FI 823151 A FI823151 A FI 823151A FI 823151 A FI823151 A FI 823151A FI 65673 B FI65673 B FI 65673B
Authority
FI
Finland
Prior art keywords
saogat
kvistar
dyikt
virke
eller
Prior art date
Application number
FI823151A
Other languages
English (en)
Other versions
FI823151A0 (fi
FI65673C (fi
Inventor
Pekka Jakkula
Original Assignee
Ahlstroem 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 Ahlstroem Oy filed Critical Ahlstroem Oy
Priority to FI823151A priority Critical patent/FI65673C/fi
Publication of FI823151A0 publication Critical patent/FI823151A0/fi
Priority to US06/529,619 priority patent/US4607212A/en
Priority to SE8304820A priority patent/SE460504B/sv
Priority to SU833652182A priority patent/SU1322992A3/ru
Application granted granted Critical
Publication of FI65673B publication Critical patent/FI65673B/fi
Publication of FI65673C publication Critical patent/FI65673C/fi

Links

Classifications

    • 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
    • G01R27/04—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant in circuits having distributed constants, e.g. having very long conductors or involving high frequencies
    • G01R27/06—Measuring reflection coefficients; Measuring standing-wave ratio
    • 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
    • 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
    • G01N33/46—Wood

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Wood Science & Technology (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
FI823151A 1982-09-10 1982-09-10 Foerfarande och anordning foer detektering av kvistar eller dyikt i saogat virke FI65673C (fi)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FI823151A FI65673C (fi) 1982-09-10 1982-09-10 Foerfarande och anordning foer detektering av kvistar eller dyikt i saogat virke
US06/529,619 US4607212A (en) 1982-09-10 1983-09-06 Method and apparatus for detection of knots or the like in sawn lumber
SE8304820A SE460504B (sv) 1982-09-10 1983-09-08 Foerfarande och anordning foer iakttagande av kvistar eller motsvarande i saagat virke
SU833652182A SU1322992A3 (ru) 1982-09-10 1983-09-09 Способ обнаружени дефектов в диэлектрических материалах

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI823151A FI65673C (fi) 1982-09-10 1982-09-10 Foerfarande och anordning foer detektering av kvistar eller dyikt i saogat virke
FI823151 1982-09-10

Publications (3)

Publication Number Publication Date
FI823151A0 FI823151A0 (fi) 1982-09-10
FI65673B true FI65673B (fi) 1984-02-29
FI65673C FI65673C (fi) 1984-06-11

Family

ID=8516025

Family Applications (1)

Application Number Title Priority Date Filing Date
FI823151A FI65673C (fi) 1982-09-10 1982-09-10 Foerfarande och anordning foer detektering av kvistar eller dyikt i saogat virke

Country Status (4)

Country Link
US (1) US4607212A (fi)
FI (1) FI65673C (fi)
SE (1) SE460504B (fi)
SU (1) SU1322992A3 (fi)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4831545A (en) * 1987-06-26 1989-05-16 Weyerhaeuser Company Method for determination of pith location relative to lumber surfaces
US4916629A (en) * 1987-06-26 1990-04-10 Weyerhaeuser Company Method for determination of pith location relative to lumber surfaces
US4926350A (en) * 1987-09-14 1990-05-15 Metriguard, Inc. Non-destructive testing methods for lumber
FR2635187B1 (fr) * 1988-08-03 1990-11-09 Centre Nat Rech Scient Dispositif d'emission et de reception d'un rayonnement micro-onde, pour imagerie d'objets enfouis
JP3262606B2 (ja) * 1992-03-27 2002-03-04 旭硝子株式会社 溶融鋳造耐火物の内部品質評価方法
US5393557A (en) * 1992-12-17 1995-02-28 Northrop Grumman Corporation Method for measuring electromagnetic properties
US5960104A (en) * 1996-08-16 1999-09-28 Virginia Polytechnic & State University Defect detection system for lumber
AU4959400A (en) * 1999-05-27 2000-12-18 New Zealand Forest Research Institute Limited Method for imaging logs or stems and apparatus
US6480141B1 (en) 2001-03-13 2002-11-12 Sandia Corporation Detection of contraband using microwave radiation
RU2003112482A (ru) * 2003-04-29 2004-10-20 Юрий Михайлович Ермолаев (RU) Способ и устройство для просвечивания объектов и сред на продольных электрических волнах (пэв)
US8400166B2 (en) * 2009-04-29 2013-03-19 The Boeing Company Non-destructive determination of electromagnetic properties

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123702A (en) * 1976-02-13 1978-10-31 Ilmari Kinanen Method for classifying and measuring of timbers
US4123703A (en) * 1977-09-02 1978-10-31 Sri International Microwave method of and apparatus for flaw detection
FI57490C (fi) * 1978-06-01 1980-08-11 Innotec Oy Foerfarande foer bestaemning av snedfibrigheten i virke i synnerhet i saogat virke
DD139028A1 (de) * 1978-10-26 1979-12-05 Ludwig Weisser Streifenleiter zur feuchtigkeitsmessung bahnenfoermiger fester stoffe mittels mikrowellen
DE3107675C2 (de) * 1981-02-28 1985-06-20 Elektro-Physik Hans Nix & Dr.-Ing. E. Steingroever KG, 5000 Köln Verfahren und Vorrichtung zur elektronischen Messung der Dicke sehr dünner elektrisch leitfähiger Schichten auf nichtleitendem Trägermaterial

Also Published As

Publication number Publication date
SE8304820D0 (sv) 1983-09-08
SE460504B (sv) 1989-10-16
SE8304820L (sv) 1984-03-11
FI823151A0 (fi) 1982-09-10
US4607212A (en) 1986-08-19
FI65673C (fi) 1984-06-11
SU1322992A3 (ru) 1987-07-07

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Legal Events

Date Code Title Description
MM Patent lapsed
MM Patent lapsed

Owner name: A. AHLSTROEM OSAKEYHTIOE