NZ333434A - Determining log length by passing ultrasonic signal through log, and using length information to determining cut positions - Google Patents

Determining log length by passing ultrasonic signal through log, and using length information to determining cut positions

Info

Publication number
NZ333434A
NZ333434A NZ33343498A NZ33343498A NZ333434A NZ 333434 A NZ333434 A NZ 333434A NZ 33343498 A NZ33343498 A NZ 33343498A NZ 33343498 A NZ33343498 A NZ 33343498A NZ 333434 A NZ333434 A NZ 333434A
Authority
NZ
New Zealand
Prior art keywords
log
determining
length
ultrasonic signal
cut positions
Prior art date
Application number
NZ33343498A
Inventor
Michael Kenneth Andrews
Paul David Harris
Peter Charles Stratton Carter
Brian Andrew Rawley
Marcus Jean Francois Lausberg
Original Assignee
Carter Holt Harvey Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19927077&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NZ333434(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Carter Holt Harvey Ltd filed Critical Carter Holt Harvey Ltd
Priority to NZ33343498A priority Critical patent/NZ333434A/en
Priority to PCT/NZ1999/000134 priority patent/WO2000036413A1/en
Priority to AU54539/99A priority patent/AU751539B2/en
Priority to EP99940745A priority patent/EP1159610A4/en
Priority to CA002360778A priority patent/CA2360778C/en
Publication of NZ333434A publication Critical patent/NZ333434A/en
Priority to US10/361,015 priority patent/US6769306B2/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
    • G01N2203/0623—Electrical or magnetic indicating, recording or sensing means using piezoelectric gauges
    • 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
    • G01N2291/0238—Wood
    • 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
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0421—Longitudinal waves

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
NZ33343498A 1998-12-17 1998-12-17 Determining log length by passing ultrasonic signal through log, and using length information to determining cut positions NZ333434A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NZ33343498A NZ333434A (en) 1998-12-17 1998-12-17 Determining log length by passing ultrasonic signal through log, and using length information to determining cut positions
PCT/NZ1999/000134 WO2000036413A1 (en) 1998-12-17 1999-08-17 Log cutting procedures
AU54539/99A AU751539B2 (en) 1998-12-17 1999-08-17 Log cutting procedures
EP99940745A EP1159610A4 (en) 1998-12-17 1999-08-17 Log cutting procedures
CA002360778A CA2360778C (en) 1998-12-17 1999-08-17 Log cutting procedures
US10/361,015 US6769306B2 (en) 1998-12-17 2003-02-10 Log cutting procedures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NZ33343498A NZ333434A (en) 1998-12-17 1998-12-17 Determining log length by passing ultrasonic signal through log, and using length information to determining cut positions

Publications (1)

Publication Number Publication Date
NZ333434A true NZ333434A (en) 1999-10-28

Family

ID=19927077

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ33343498A NZ333434A (en) 1998-12-17 1998-12-17 Determining log length by passing ultrasonic signal through log, and using length information to determining cut positions

Country Status (5)

Country Link
EP (1) EP1159610A4 (en)
AU (1) AU751539B2 (en)
CA (1) CA2360778C (en)
NZ (1) NZ333434A (en)
WO (1) WO2000036413A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7603904B2 (en) 2005-02-11 2009-10-20 Waratah Nz Limited Method and apparatus for assessing or predicting the characteristics of wood

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU780469B2 (en) * 1998-02-25 2005-03-24 Weyerhaeuser Company Unfinished wood product cutting optimization system
EP1208375A4 (en) * 1999-07-30 2007-04-18 Fibre Gen Instr Ltd Log testing apparatus
NZ503953A (en) * 2000-04-12 2002-12-20 Carter Holt Harvey Ltd Apparatus and method for estimating timber stiffness profiles of a log by determining the density profile of a cant
AU2002242023B2 (en) 2001-01-31 2008-01-03 Board Of Control Of Michigan Technological University System for and method of performing evaluation techniques on a log or round timber
US6598477B2 (en) 2001-10-31 2003-07-29 Weyerhaeuser Company Method of evaluating logs to predict warp propensity of lumber sawn from the logs
WO2005078435A1 (en) * 2004-02-13 2005-08-25 Institute Of Geological & Nuclear Sciences Limited Method and system for determining the modulus of elasticity of green lumber
US7017413B2 (en) * 2004-03-31 2006-03-28 Weyerhaeuser Company Methods for quantitatively determining lengthwise shrinkage in wood products

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA918286A (en) * 1968-09-13 1973-01-02 Washington State University Research Foundation Non-destructive method of grading wood materials
US5024091A (en) * 1986-03-25 1991-06-18 Washington State University Research Foundation, Inc. Non-destructive evaluation of structural members
SU1530986A1 (en) * 1987-02-20 1989-12-23 Н,Л,Егин Device for inspecting mechanical strength of wooden structures
US4852029A (en) * 1987-06-17 1989-07-25 Accu-Tech Incorporated Automated material classification apparatus and method
US5097881A (en) * 1991-04-25 1992-03-24 Blount, Inc. Ultrasonic log grading
JP3060053B2 (en) * 1992-02-26 2000-07-04 宮崎県 Simplified grading method for lumber products
US5307679A (en) * 1992-03-25 1994-05-03 The United States Of America As Represented By The Secretary Of Agriculture Method and apparatus for evaluating the drying properties of un-dried wood
JP2787526B2 (en) * 1992-07-03 1998-08-20 株式会社 一条工務店 Wood grade discriminator
DE9315506U1 (en) * 1993-10-13 1993-12-02 Fagus-Grecon Greten Gmbh & Co Kg, 31061 Alfeld Device for mechanical strength sorting of sawn timber
JPH07128307A (en) * 1993-10-29 1995-05-19 Shiro Aratake Convenient method for measuring moisture content of sawn lumber
JPH09251006A (en) * 1996-03-15 1997-09-22 Shizuoka Seiki Co Ltd Portable strength judging apparatus
SE511602C2 (en) * 1996-06-17 1999-10-25 Dynalyse Ab Method and apparatus for destructive classification of preferably elongated and / or disc-shaped objects
US6026689A (en) * 1998-02-25 2000-02-22 Weyerhaeuser Company Log cutting optimization system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7603904B2 (en) 2005-02-11 2009-10-20 Waratah Nz Limited Method and apparatus for assessing or predicting the characteristics of wood

Also Published As

Publication number Publication date
AU751539B2 (en) 2002-08-22
EP1159610A4 (en) 2003-01-15
EP1159610A1 (en) 2001-12-05
CA2360778C (en) 2008-07-08
WO2000036413A1 (en) 2000-06-22
CA2360778A1 (en) 2000-06-22
AU5453999A (en) 2000-07-03

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Legal Events

Date Code Title Description
PSEA Patent sealed
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ASS Change of ownership

Owner name: FIBRE-GEN INSTRUMENTS LIMITED, NZ

Free format text: OLD OWNER(S): CARTER HOLT HARVEY LIMITED

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EXPY Patent expired