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SE9700138D0 - Ways of using radio wave technology to map inhomogeneities in wood - Google Patents

Ways of using radio wave technology to map inhomogeneities in wood

Info

Publication number
SE9700138D0
SE9700138D0 SE9700138A SE9700138A SE9700138D0 SE 9700138 D0 SE9700138 D0 SE 9700138D0 SE 9700138 A SE9700138 A SE 9700138A SE 9700138 A SE9700138 A SE 9700138A SE 9700138 D0 SE9700138 D0 SE 9700138D0
Authority
SE
Sweden
Prior art keywords
wood
radio wave
polarised
inhomogeneities
map
Prior art date
Application number
SE9700138A
Other languages
Swedish (sv)
Other versions
SE512315C2 (en
SE9700138L (en
Inventor
Lars Baaaath
Anders Kaestner
Original Assignee
Lars Baaaath
Anders Kaestner
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 Lars Baaaath, Anders Kaestner filed Critical Lars Baaaath
Priority to SE9700138A priority Critical patent/SE512315C2/en
Publication of SE9700138D0 publication Critical patent/SE9700138D0/en
Publication of SE9700138L publication Critical patent/SE9700138L/en
Publication of SE512315C2 publication Critical patent/SE512315C2/en

Links

Classifications

    • 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

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (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)

Abstract

The method involves polarising one radio wave longitudinally in the direction of the fibres of the wood and polarising the other wave at right-angles to it. With a transmitter, two linear polarised radio waves are transmitted, the one polarised longitudinally with the wood fibre direction and the other polarised at right-angles to the first, and this in the direction of the object or structure of wood. With a receiver, the two reflected or transmitted waves are received. The time delay spectrum is measured for each of the polarisations and the relationship between them is determined in each measured delay point. The measurements are made in a number of directions through the same cross-section of wood and the measured relative delay spectra are brought together to form a cross-sectional picture of the object or structure. With the method, branches and twigs in the wood are charted.
SE9700138A 1997-01-17 1997-01-17 Method for charting lack of homogenities in wood SE512315C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9700138A SE512315C2 (en) 1997-01-17 1997-01-17 Method for charting lack of homogenities in wood

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9700138A SE512315C2 (en) 1997-01-17 1997-01-17 Method for charting lack of homogenities in wood

Publications (3)

Publication Number Publication Date
SE9700138D0 true SE9700138D0 (en) 1997-01-17
SE9700138L SE9700138L (en) 1998-07-18
SE512315C2 SE512315C2 (en) 2000-02-28

Family

ID=20405457

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9700138A SE512315C2 (en) 1997-01-17 1997-01-17 Method for charting lack of homogenities in wood

Country Status (1)

Country Link
SE (1) SE512315C2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001020311A1 (en) * 1999-09-17 2001-03-22 Sik - Institut För Livsmedel Och Bioteknik Ab Apparatus and method for detection of foreign bodies in products
SE517315C2 (en) 1999-09-17 2002-05-21 Sik Inst Foer Livsmedel Och Bi Apparatus and method for detecting foreign bodies in products
US7520667B2 (en) 2006-05-11 2009-04-21 John Bean Technologies Ab Method and system for determining process parameters
AT521092B1 (en) * 2018-03-27 2019-12-15 Springer Maschf Gmbh Method of measuring a tree trunk

Also Published As

Publication number Publication date
SE512315C2 (en) 2000-02-28
SE9700138L (en) 1998-07-18

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