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Essai d'un humidimètre NIR pour mesurer la teneur en humidité de bois feuillu

https://library.fpinnovations.ca/en/permalink/fpipub5777
Author
Lavoie, Vincent
Lejeune, Claude
Tanguay, F.
Dupont, Danick
Ding, Feng
Date
March 2013
Edition
39752
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Lavoie, Vincent
Lejeune, Claude
Tanguay, F.
Dupont, Danick
Ding, Feng
Contributor
CRIQ
Date
March 2013
Edition
39752
Material Type
Research report
Physical Description
27 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Drying
Moisture content
Hardwoods
Location
Québec, Québec
Language
French
Abstract
Le mandat du projet consiste en la réalisation d’essais avec un équipement d’acquisition générique NIR (Near Infrared) dans le but de développer des modèles mathématiques pouvant être utilisés pour déterminer le taux d’humidité des planches de bois franc pour quatre essences : le chêne rouge, l’érable à sucre, le merisier et l’érable argenté. Une fois les modèles développés les objectifs plus spécifiques sont d’évaluer le niveau de précision de mesure de la teneur en humidité sur du bois parfaitement équilibré ainsi que déterminer les impacts sur les lectures provenant des facteurs suivants : l’essence, la densité, la qualité de surface, la température du bois, le gradient de teneur en humidité ainsi que la vitesse de passage des planches. Finalement, des essais doivent être réalisés sur du bois provenant directement de l’industrie et n’ayant subi aucun traitement d’équilibrage en laboratoire pour connaître le niveau de précision de lecture dans ces conditions.
MOISTURE METERS
HARDWOODS
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Facteurs influant sur la precision de la lecture du degre d'humidite d'un hygrometre a usage continu (Mars 1989)

https://library.fpinnovations.ca/en/permalink/fpipub5647
Author
Garrahan, Peter A.
Pfaff, Frank
Morin, M.
Date
March 1991
Edition
38439
Material Type
Research report
Field
Wood Manufacturing & Digitalization
- applications to moisture content measurement. Compte rendu du séminaire sur la technologie du balayage
Author
Garrahan, Peter A.
Pfaff, Frank
Morin, M.
Date
March 1991
Edition
38439
Material Type
Research report
Physical Description
30 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Moisture content
Series Number
E-1273
Location
Ottawa, Ontario
Language
French
Abstract
Moisture Determination, Electrical - Accuracy
Moisture Meters (In-line)
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Factors influencing accuracy of MC estimates from an in-line moisture meter

https://library.fpinnovations.ca/en/permalink/fpipub38333
Author
Garrahan, Peter A.
Pfaff, Frank
Date
March 1989
Material Type
Research report
Field
Wood Manufacturing & Digitalization
Author
Garrahan, Peter A.
Pfaff, Frank
Date
March 1989
Material Type
Research report
Physical Description
33 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Moisture content
Series Number
3743K404
E-1069
Location
Ottawa, Ontario
Language
English
Abstract
Moisture Determination, Electrical - Accuracy
Moisture Meters, In-line
Documents
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Moisture content correction tables for the resistance-type moisture meter : eastern species

https://library.fpinnovations.ca/en/permalink/fpipub38195
Author
Pfaff, Frank
Garrahan, Peter A.
Date
August 1984
Material Type
Research report
Field
Wood Manufacturing & Digitalization
humidit pour hygrom&res 51 r&sistance Moisture Content Correction Tables for the Resistance-Type
Author
Pfaff, Frank
Garrahan, Peter A.
Date
August 1984
Material Type
Research report
Physical Description
42 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Moisture content
Measurement
Series Number
Special Publication SP-511E
E-629
Location
Ottawa, Ontario
Language
English
ISBN
ISBN-0-86488-511-1
Abstract
Correction factors are provided for the Delmhorst resistance-type moisture meters equipped with 2-pin insulated electrodes. These factors allow the operator to adjust the meter reading for a wood temperature range of -40 degree centigrade to 50 degree centigrade. Factors are provided for 12 softwood species and 14 hardwood species.
Moisture Meter
Eastern Species
Moisture Content Correction Tables
Forintek Canada Corp. - Publications
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Review of moisture measuring technologies used in the solid wood products industry

https://library.fpinnovations.ca/en/permalink/fpipub39749
Author
Garrahan, Peter A.
McRae, David
Date
2000
Material Type
Research report
Field
Wood Manufacturing & Digitalization
of commonly employed equipment and procedures for evaluation of moisture content in solid-wood products
Author
Garrahan, Peter A.
McRae, David
Contributor
Sundance Forest Industries Ltd. Alberta Government. Department of Alberta Innovation and Science
Date
2000
Material Type
Research report
Physical Description
35 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Drying
Moisture content
Series Number
W-3047
Location
Edmonton, Alberta
Language
English
Abstract
This study involved the on-site evaluation of commonly employed equipment and procedures for evaluation of moisture content in solid-wood products. Specifically, a DC-resistance and two RF-based moisture meters were evaluated. The main overall objective was to identify procedures or develop information to allow more accurate final MC estimates to be determined. Lodgepole pine lumber of 25 and 40 mm thicknesses was employed for the test Material was tested at three time intervals spanning from the completion of drying to approximately 30 hours after drying. Meter readings were compared against oven-dry moisture contents. In most situations the moisture meters employed tended to underestimate final moisture content with the error varying from close to zero up to about 3 percent. The errors observed seemed to be consistent for a given test. This opens the possibility of employing site-specific correction factors to obtain better estimates of oven-dry moisture content. Problems may still arise when comparing mill results of moisture tests against those performed elsewhere by customers and end users.
SEASONING
Moisture measurement
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