Skip header and navigation

31 records – page 1 of 4.

Author
Orbay, L.
Date
January 2002
Material Type
Research report
Field
Wood Manufacturing & Digitalization
optimization could be implemented using currently available scanning technologies and optimization software
Author
Orbay, L.
Date
January 2002
Material Type
Research report
Physical Description
47 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Scanning electron microscopy
Scanners
Series Number
1983
W-1826
Location
Vancouver, British Columbia
Language
English
Abstract
Thirty full-length sample trees from the B.C. Interior were selected for a study to determine whether external log characteristics can predict internal log quality. The sample trees were also used to create 3-dimensional log images for sawmill simulation purposes. "LogSaw", a simulation tool with internal log defect detection capabilities, was used to explore the extent to which internal and external log quality information can improve log breakdown optimization. A model of a hypothetical sawmill producing lumber for the standard North American dimension market was created to study how lumber value recovery depends on different sawing optimization scenarios. Three sawing optimization scenarios using different levels of knowledge of internal log defects were compared to currently used sawing optimization technique:
Ideal sawing optimization - all defects within log interior are known.
Sawing optimization using only the knowledge of surface knots.
Sawing optimization using log rotation instructions based on zones of least external knot density. Simulation results have shown that it is worthwhile to “look into the log”. When compared with the current optimization technique, the sawing optimization, including the full knowledge of log interior, has increased the value recovery by 6.2%. When only the surface knots were projected into the log interior and included in the optimization, the value recovery had increased by 4.3%. Even this 4.3% increase is still a big improvement because this sawing optimization could be implemented using currently available scanning technologies and optimization software enhanced to include log surface knots. The scenario of using log rotation instructions based on predicted zones of least internal knot density did not show value recovery improvement. Including surface knots in the log breakdown optimization has considerably increased sawmill revenue; the hypothetical sawmill considered in this study, processing 400,000 m3 of log per year, has increased its revenue by $2.2 million.
Scanners, Electronic
Defects - Detection
Documents
Less detail

Accounting for bark when scanner scaling: methods and technologies

https://library.fpinnovations.ca/en/permalink/fpipub3385
Author
Dyson, Peter
Date
October 2015
Edition
40056
Material Type
Research report
Field
Fibre Supply
Author
Dyson, Peter
Date
October 2015
Edition
40056
Material Type
Research report
Physical Description
11 p.
Sector
Forest Operations
Field
Fibre Supply
Research Area
Forestry
Subject
Bark
Scaling
Scanning
Thickness
FOP Technical Report
FPI TR
Series Number
Technical Report ; TR 2015 n.37
Language
English
Abstract
Forest companies across Canada are interested in using laser scanners for scaling logs because it has potential for reducing scaling costs. Scanning logs over bark requires a method to obtain the under-bark diameter in order to calculate the solid wood volume. This report evaluates the methods of applying a bark factor to determine under-bark diameter. It also identifies new scanner scaling technologies for measuring bark thickness.
Documents
Less detail

An evaluation of the detection capacity of automated defect detection systems

https://library.fpinnovations.ca/en/permalink/fpipub42349
Author
Rancourt, V.
Date
March 2005
Material Type
Pamphlet
Field
Sustainable Construction
Author
Rancourt, V.
Date
March 2005
Material Type
Pamphlet
Physical Description
4 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Scanning
Series Number
Technology Profile ; TP-04-05E
E-4005
Location
Sainte-Foy, Québec
Language
English
Abstract
Using automation to maximise yield from increasingly rare and costly raw materials is a solution that can help secondary wood producers improve their profitability. By integrating an automated defect detection system, lumber producers can potentially increase production output and grade recovery, helping them to strengthen their strategic business advantage. To develop a reference tool to assist in the choice of an appropriate defect detection system, Forintek conducted a detection capacity evaluation of commercially available equipment. Nineteen (19) manufacturers who work in the area of defect detection in lumber were contacted; of these, four agreed to participate in the study. The project objectives were based on requests from the producers: the evaluation focussed on the detection capacity of specific defects and not on the performance of the overall system. Defects were identified and an experimental evaluation was conducted to determine if the equipment recognised the defects or not. A decision tool based on a multi-criteria analysis has been proposed in the completed project report, to help producers identify the most appropriate defect detection system. However, no evaluation can be offered for the overall performance of the systems assessed, as production needs differ from producer to producer.
Defects - Detection
Documents
Less detail

A computer visualization and analysis of wet-wood distribution and related processing alternatives for subalpine fir trees

https://library.fpinnovations.ca/en/permalink/fpipub37634
Author
Alkan, S.
Date
October 2002
Material Type
Research report
Field
Sustainable Construction
would be the use of more accurate non-destructive scanning techniques, such as CT- scanning, to verify
Author
Alkan, S.
Date
October 2002
Material Type
Research report
Physical Description
36 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Wetwoods
Simulation
Scanning electron microscopy
Scanners
Grading
Balsam
Automatic control
Fir
Series Number
1020
W-1911
Location
Vancouver, British Columbia
Language
English
Abstract
A software, by which virtual 3-D subalpine fir (Abies lasiocarpa [Hook] Nutt) logs can be re-created, visualized, and theoretically sawn an infinite number of times, was developed. The software also facilitates obtaining data for determining quantitative variation of clear wood, wet-wood, and knot patterns within the tree stems. Results based on the quantitative calculations showed that there are two general patterns of wet-wood within the sub-alpine fir stems. The first pattern is called wet-pocket and the second pattern is called wet-streak. Wet-streak patterns are generally confined to the medullary-inner heartwood regions in the outer heartwood and heartwood-sapwood transition zones of the tree stems, mostly associated with dead knots. Wet-pocket patterns consist of portions occurring in mid regions in close proximity to the base and regions mostly around partially dead knots of the tree stems. Both wet-wood patterns usually converge at the nodes and extend along the branch axes, forming a connection with the exterior boundary only around branches. Numerical analysis of the results showed that the volume of both types is more prevalent in the lower-stem regions, becoming less prevalent towards the living crown. The radial extension of wet-wood types with radial distance from the tree centre was variable, with a maximum diameter of 22 cm. Both wet-wood volumes increased with increasing tree age and diameter class independent of age. However, the percentage of total wet-wood volume decreased with increasing DBH, increased stem height and showed no clear trend with age class. Total amounts of wet-wood ranged up to 27 per cent in individual stems. A weak relationship was found between dead knot-pattern and wet-streak pattern volumes, while a moderate high relationship was found between partially dead knot and wet-pocket volumes. A weak relationship was found between external tree characteristics and both wet-wood distributions. As a result, some promising trends emerged for a better understanding of wet-wood and knot pattern variations as influenced by tree stem locations, DBH, and age. The developed software may offer a compelling technique for assisting subalpine fir log processing decisions. However, the destructive data collection method used in this study is “error-prone”. Therefore, an interesting alternative would be the use of more accurate non-destructive scanning techniques, such as CT-scanning, to verify the trends identified here through more deliberate sampling at other forest sites. A new study is already underway to meet this need.
Moisture content
Computer simulation
Abies lasiocarpa
Scanners, Electronic
Defects - Detection
Grading - Automation
Wetwood
Documents
Less detail

Demonstration of potential improvements in log bucking systems

https://library.fpinnovations.ca/en/permalink/fpipub5500
Author
Giles, D.R.
Wang, S.J.
Munro, B.D.
Date
March 1989
Edition
37286
Material Type
Research report
Field
Wood Manufacturing & Digitalization
e s have been completed t o gather data t o determine the accuracy of ceunera scanning technology f
Author
Giles, D.R.
Wang, S.J.
Munro, B.D.
Date
March 1989
Edition
37286
Material Type
Research report
Physical Description
18 p..
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Advanced Wood Manufacturing
Subject
Scanning electron microscopy
Scanners
Saw mills
Efficiency
Logs
Series Number
W-946
Location
Vancouver, British Columbia
Language
English
Abstract
Logging - Bucking
Sawmilling - Efficiency
Scanners, Electronic
Documents
Less detail

Development of SEM energy dispersive X-ray analytical capabilities

https://library.fpinnovations.ca/en/permalink/fpipub36944
Author
Keith, C.T.
Chauret, Gilles
Date
March 1988
Material Type
Research report
Field
Sustainable Construction
of an energy d i s p e r s i v e X-ray microanalyser (EDXA) to our scanning e l e c t r o n microscope (SEM) f
Author
Keith, C.T.
Chauret, Gilles
Date
March 1988
Material Type
Research report
Physical Description
29 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Scanning
Series Number
CFS No. 34
contract no.5512A101
W-616
Location
Ottawa, Ontario
Language
English
Abstract
Microscopy, Electron, Scanning
Documents
Less detail

Development of SEM energy dispersive X-ray analytical capabilities

https://library.fpinnovations.ca/en/permalink/fpipub37176
Author
Keith, C.T.
Date
March 1987
Material Type
Research report
Field
Sustainable Construction
Author
Keith, C.T.
Date
March 1987
Material Type
Research report
Physical Description
1 v.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Scanning
Series Number
CFS No. 39a;02-55-12-101
W-445
Location
Ottawa, Ontario
Language
English
Abstract
Microscopy, Electron, Scanning
Documents
Less detail

Development of sem energy dispersive X-ray analytical capabilities

https://library.fpinnovations.ca/en/permalink/fpipub38227
Author
Keith, C.T.
Chauret, Gilles
Date
March 1988
Material Type
Research report
Field
Sustainable Construction
Author
Keith, C.T.
Chauret, Gilles
Date
March 1988
Material Type
Research report
Physical Description
29 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Wood
Scanning
Scanning electron microscopy
Analysis
Series Number
CFS project no.34
Project no.5512A101
E-779
Location
Ottawa, Ontario
Language
English
Abstract
Scanning electron microscopy
SEM
Wood - Anatomy - Analysis
Documents
Less detail

Development of SEM energy dispersive x-ray analytical capabilities

https://library.fpinnovations.ca/en/permalink/fpipub38176
Author
Keith, C.T.
Date
March 1987
Material Type
Research report
Field
Sustainable Construction
Author
Keith, C.T.
Date
March 1987
Material Type
Research report
Physical Description
37 p.
Sector
Wood Products
Field
Sustainable Construction
Research Area
Advanced Wood Materials
Subject
Wood
Testing
Scanning
Scanning electron microscopy
Analysis
Series Number
CFS project no.39a
Project no.5512101
E-581
Location
Ottawa, Ontario
Language
English
Abstract
Scanning electron microscopy
Wood - Chemistry - Testing
Wood - Analysis
Documents
Less detail

Effect of internal defect information on bucking optimization

https://library.fpinnovations.ca/en/permalink/fpipub37929
Author
Orbay, L.
Date
October 2008
Material Type
Research report
Field
Wood Manufacturing & Digitalization
to evaluate the performance of three scenarios of sawmill operation: 1) External Scanning at the bucking
Author
Orbay, L.
Date
October 2008
Material Type
Research report
Physical Description
23 p.
Sector
Wood Products
Field
Wood Manufacturing & Digitalization
Research Area
Digitalization
Subject
Studs
Scanning electron microscopy
Scanners
Saw mills
Efficiency
Series Number
5409
W-2611
Location
Vancouver, British Columbia
Language
English
Abstract
Computer simulation was used to evaluate the performance of three scenarios of sawmill operation: 1) External Scanning at the bucking station, 2) X-ray Scanning with external plus partial internal knot scanning at the bucking station and 3) Perfect Scanning with external plus full internal knot scanning throughout the mill. Forty sample stems were scanned and stem models developed to provide input for Forintek’s sawing simulation program, OPTITEK®. Input files of both sawmill machinery and their products were developed based upon the operation of a typical sawmill in the Interior of B.C. Optimized bucking solutions were generated, and sample stems were sawn accordingly. Lumber value and volume recovery data were obtained and enabled a comparison of the performance of the three operational scenarios. The X-ray Scanner Scenario provided a 2% value recovery increase compared to that of External Scanner Scenario. The Perfect Scanner Scenario added an additional 5.5% to that of X-ray Scanner Scenario. This was due partly to improved scanning at the bucking station but more so to the internal defect detection at all machine centers in the mill. Conclusions of the study should help sawmillers in their investment decisions regarding sawing optimization improvements.
Sawmilling - Efficiency
Sawmilling studies
Scanners, Electronic
Documents
Less detail

31 records – page 1 of 4.