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Detection of defects in wood by ultrasonics

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dc.contributor.advisor Milota, Michael
dc.creator Gimenez, Ramon Gonzalez
dc.date.accessioned 2010-09-17T16:20:08Z
dc.date.available 2010-09-17T16:20:08Z
dc.date.copyright 2001-09-21
dc.date.issued 2001-09-21
dc.identifier.uri http://hdl.handle.net/1957/18420
dc.description Graduation date: 2002 en
dc.description.abstract Ultrasonic wave attenuation and velocity in the transverse direction were used to detect defects in ponderosa pine (Pinus Ponderosa) lumber previously dried from green to 9% moisture content. After ultrasonic testing the boards were visually inspected for defects and classified according to the defects present. An ANOVA with Bonferroni pairwise comparison were used to establish differences between clear and defective wood. There are differences in the parameter means between clear wood and wood containing defects; however, variability in the measured parameters is great, preventing an accurate separation of defective wood from clear wood. Because of this application in industry is limited. en
dc.language.iso en_US en
dc.subject.lcsh Ultrasonic testing en
dc.subject.lcsh Ultrasonic waves -- Attenuation en
dc.subject.lcsh Ultrasonic waves -- Industrial applications en
dc.subject.lcsh Ponderosa pine en
dc.subject.lcsh Wood -- Defects en
dc.title Detection of defects in wood by ultrasonics en
dc.type Thesis/Dissertation en
dc.degree.name Master of Science (M.S.) in Forest Products en
dc.degree.level Master's en
dc.degree.discipline Forestry en
dc.degree.grantor Oregon State University en
dc.description.digitization File scanned at 300 ppi (Monochrome, 24-bit Color) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR. en

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