Index Catalog // ScholarsArchive@OSU

Dielectric properties of defects on wood surfaces

Creator:: Forrer, Johannes B.
Abstract:: Raw material costs and limited material availability and quality have created significant interest in and opportunities for the application of nondestructive evaluation techniques to improve wood processing technologies. The incentives come from the desire to 1) manufacture the highest valued product, 2) conserve the amount of raw material used, 3)...
Resource Type:: Dissertation
Full Text:: much-needed future applications in this field. My gratitude goes to Dr. James W. Funck, major

Green-end veneer recovery and losses : a detailed study in types and volumes

Creator:: Sheffield, Thomas H.
Abstract:: Previous studies have indicated that the largest loss associated with green veneer production occurs at the green veneer clipper. It has been reported that up to 26 percent of the block volume is lost during clipping. However, because of today's processing sophistication, this value is no longer considered current nor...
Resource Type:: Masters Thesis
Full Text:: Recovery and Losses: A Detailed Study in Types and Volumes Abstract approved: Dr. James W. Funck

Growth ring pattern consideration in computer sawing simulation

Creator:: Bricka, Vincent
Abstract:: The Best Opening Face (BOF) log breakdown model was modified to keep track of growth ring angle and growth ring density in boards. The model was used to determine the effects of producing rectangular rather than square pencil stock. While an increase in volume did result, there was also a...
Resource Type:: Masters Thesis

Image segmentation for defect detection on veneer surfaces

Creator:: Zhong, Yuan, 1956-
Abstract:: Machine vision is widely used in scientific areas and non-wood using industries, but the extreme variability of wood has limited its adoption by forest products industries. However, it is now becoming a key factor in further automation of the forest products industry. As a very important part of machine vision,...
Resource Type:: Dissertation

Influence of veneer roughness, lathe check, and annual ring characteristics on glue-bond performance of Douglas-fir plywood

Creator:: DeVallance, David B.
Abstract:: Current lathe technology, smaller diameter logs, smaller core diameters, and the sale of higher grade veneer for use in engineered wood products are all factors contributing to plywood manufacturers using rougher veneer with different lathe check characteristics. When rough veneer is encountered, plywood manufacturers typically increase the adhesive spread rate...
Resource Type:: Masters Thesis
Full Text:: aiñes W. Funek Ja es E. ' eeb Current lathe technology, smaller diameter logs, smaller core diameters

Integration of an expert system and dynamic programming approach to optimize log breakdown using 3-dimensional log and internal defect shape information

Creator:: Zeng, Yimin
Abstract:: A computer program, SAW3DG, was developed to optimize log breakdown using 3-dimensional log and internal defect shapes. The program was based on SAW3D, a log breakdown optimization program considering only 3-dimensional log shape. SAW3D was modified to include internal log defects in 3-dimensional representation and integrated with SLGRADER, an expert...
Resource Type:: Dissertation

Log breakdown using dynamic programming and 3-D log shape

Creator:: Zeng, Yimin
Abstract:: A log breakdown model, SAW3D, was developed to optimize lumber recovery from logs of any shape in 3- dimensional space. The program uses a polygonal cross section representation of logs; three nested dynamic programming (DP) algorithms to optimize log breakdown, flitch and cant edging, and trimming operations; and a simple...
Resource Type:: Masters Thesis

Non-destructive evaluation of veneer using optical scanning and ultrasonic stress wave analysis systems

Creator:: DeVallance, David B.
Abstract:: Non-destructive commercial ultrasonic grading provides laminated veneer lumber (LVL) manufacturers a means for sorting veneer based on average ultrasonic propagation time (UPT) and/or average dynamic modulus of elasticity (MOEd). While this may provide reliable estimations of modulus of elasticity (MOE), little is known about the influence of veneer defects on...
Resource Type:: Dissertation
Full Text:: : James W. Funck Non-destructive commercial ultrasonic grading provides laminated veneer

On-line lumber quality control technique using image processing

Creator:: Aslam, Fatima
Abstract:: Product quality control is the back bone for an efficient process control system. By monitoring the size of the board cut in a sawmill, performance of the production system can be controlled. Feedback from the quality control system is used to evaluate the status of the production system and also...
Resource Type:: Masters Thesis

Performance analysis of the hardware and software components of an optical scanning system for monitoring lumber sizes

Creator:: Leavengood, Scott A.
Abstract:: In recent years, the forest products industry has been forced to cope with a supply of raw material that is declining in both quality and quantity. In addition, log prices are escalating rapidly. Because log costs may represent as much as 90 percent of the overall production costs of lumber...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Dielectric properties of defects on wood surfaces

Green-end veneer recovery and losses : a detailed study in types and volumes

Growth ring pattern consideration in computer sawing simulation

Image segmentation for defect detection on veneer surfaces

Influence of veneer roughness, lathe check, and annual ring characteristics on glue-bond performance of Douglas-fir plywood

Integration of an expert system and dynamic programming approach to optimize log breakdown using 3-dimensional log and internal defect shape information

Log breakdown using dynamic programming and 3-D log shape

Non-destructive evaluation of veneer using optical scanning and ultrasonic stress wave analysis systems

On-line lumber quality control technique using image processing

Performance analysis of the hardware and software components of an optical scanning system for monitoring lumber sizes

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