CA2360778C - Procedes de coupe de billes - Google Patents

Procedes de coupe de billes Download PDF

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Publication number
CA2360778C
CA2360778C CA002360778A CA2360778A CA2360778C CA 2360778 C CA2360778 C CA 2360778C CA 002360778 A CA002360778 A CA 002360778A CA 2360778 A CA2360778 A CA 2360778A CA 2360778 C CA2360778 C CA 2360778C
Authority
CA
Canada
Prior art keywords
stem
tree
moe
log
stiffness
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.)
Expired - Fee Related
Application number
CA002360778A
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English (en)
Other versions
CA2360778A1 (fr
Inventor
Michael Kenneth Andrews
Paul David Harris
Peter Charles Stratton Carter
Brian Andrew Rawley
Marcus Jean Francois Lausberg
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.)
FIBRE-GEN INSTRUMENTS Ltd
Original Assignee
FIBRE-GEN INSTRUMENTS 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=CA2360778(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by FIBRE-GEN INSTRUMENTS Ltd filed Critical FIBRE-GEN INSTRUMENTS Ltd
Publication of CA2360778A1 publication Critical patent/CA2360778A1/fr
Application granted granted Critical
Publication of CA2360778C publication Critical patent/CA2360778C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (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)

Abstract

La présente invention concerne un procédé d'essai qui se pratique sur une seule extrémité d'un tronc d'arbre gisant. La longueur du tronc étant connue, la rigidité et/ou les caractéristiques de résistance du tronc ou des billes à débiter de ce tronc peuvent être calculées par génération d'une onde sonore résultant d'un choc et par référence à des réflexions détectées. Un procédé préféré consiste à déterminer la fréquence fondamentale f0 rapportée à la vitesse V (vitesse des mouvements de compression longitudinaux le long du tronc) et à L (longueur du tronc), selon la formule V=2Lf0. De cette valeur V ou d'une fonction de V, un indicateur de rigidité et/ou de résistance peut être dérivé. Par exemple, le module d'élasticité (MOE) peut représenter cet indicateur et se déterminer par l'équation MOE= rho V<2>, rho étant la densité. Pour le bois vert gisant, rho peut être estimé à environ 1000 kg/m<3>.
CA002360778A 1998-12-17 1999-08-17 Procedes de coupe de billes Expired - Fee Related CA2360778C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ333434 1998-12-17
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 (fr) 1998-12-17 1999-08-17 Procedes de coupe de billes

Publications (2)

Publication Number Publication Date
CA2360778A1 CA2360778A1 (fr) 2000-06-22
CA2360778C true CA2360778C (fr) 2008-07-08

Family

ID=19927077

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002360778A Expired - Fee Related CA2360778C (fr) 1998-12-17 1999-08-17 Procedes de coupe de billes

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2855450C1 (ru) * 2025-03-19 2026-02-02 Федеральное государственное бюджетное образовательное учреждение высшего образования "Поволжский государственный технологический университет" Способ изготовления конструкционных пиломатериалов

Families Citing this family (8)

* 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
CA2380988C (fr) * 1999-07-30 2009-01-06 Carter Holt Harvey Limited Appareil servant a verifier des rondins de bois
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
CA2436492A1 (fr) * 2001-01-31 2002-08-08 Board Of Control Of Michigan Technological University Systeme et procede de realisation de techniques d'evaluation sur de billes ou bois d'oeuvre
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 (fr) * 2004-02-13 2005-08-25 Institute Of Geological & Nuclear Sciences Limited Procede et systeme de determination du module d'elasticite du bois vert
US7017413B2 (en) * 2004-03-31 2006-03-28 Weyerhaeuser Company Methods for quantitatively determining lengthwise shrinkage in wood products
NZ545247A (en) 2005-02-11 2007-05-31 Waratah Nz Ltd Method and apparatus for assessing or predicting the characteristics of wood

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 (ru) * 1987-02-20 1989-12-23 Н,Л,Егин Устройство дл контрол механической прочности конструкций из древесины
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 (ja) * 1992-02-26 2000-07-04 宮崎県 製材品の簡易等級区分方法
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 (ja) * 1992-07-03 1998-08-20 株式会社 一条工務店 木材の等級判別装置
DE9315506U1 (de) * 1993-10-13 1993-12-02 Fagus-Grecon Greten Gmbh & Co Kg, 31061 Alfeld Vorrichtung zur maschinellen Festigkeitssortierung von Schnittholz
JPH07128307A (ja) * 1993-10-29 1995-05-19 Shiro Aratake 製材含水率の簡易測定方法
JPH09251006A (ja) * 1996-03-15 1997-09-22 Shizuoka Seiki Co Ltd 携帯型強度判定装置
SE511602C2 (sv) * 1996-06-17 1999-10-25 Dynalyse Ab Förfarande jämte anordning för oförstörande klassificering av företrädesvis långsträckta och/eller skivformade objekt
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
RU2855450C1 (ru) * 2025-03-19 2026-02-02 Федеральное государственное бюджетное образовательное учреждение высшего образования "Поволжский государственный технологический университет" Способ изготовления конструкционных пиломатериалов

Also Published As

Publication number Publication date
EP1159610A4 (fr) 2003-01-15
WO2000036413A1 (fr) 2000-06-22
AU5453999A (en) 2000-07-03
NZ333434A (en) 1999-10-28
CA2360778A1 (fr) 2000-06-22
AU751539B2 (en) 2002-08-22
EP1159610A1 (fr) 2001-12-05

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MKLA Lapsed

Effective date: 20190819