Download or read book Locating Lumber Defects by Ultrasonics written by Kent A. McDonald and published by . This book was released on 1969 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lumber Defect Detection by Ultrasonics written by Kent A. McDonald and published by . This book was released on 1978 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultrasonic detection of lumber defects written by Kent A. McDonald and published by . This book was released on 1972 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method of locating, by ultrasonic inspection, internal defects in wood. The transit time of ultrasonic pulses through the wood, in a direction substantially perpendicular to the grain, is measured at approximately one-half inch intervals along the length and across the width of the board. The inspection is made under water. Comparison of the transit times between adjacent measurement locations provides an indication of a defect such as a knot or steep grain area between the measurement points.

Download or read book Detection of Defects in Wood by Ultrasonics written by Ramon Gonzalez Gimenez and published by . This book was released on 2001 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Lumber Defect Detection by Ultrasonics written by Kent A. MacDonald and published by . This book was released on 1978 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultrasonics, the technology of high-frequency sound, has been developed as a viable means for locating most defects in lumber for use in digital form in decision-making computers. Ultrasonics has the potential for locating surface and internal defects in lumber of all species, green or dry, and rough sawn or surfaced. (Author).

Download or read book ULTRASONIC DETECTION OF DEFECTS IN WOOD written by D. M. MAKOW and published by . This book was released on 1969 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: PULSED ULTRASOUND WITH WATER COUPLING HAS BEEN USED TO DETECT KNOTS, ROT, SHAKES AND PITCH IN SAMPLES OF WOOD. THIS PAPER DISCUSSES THE CHARACTERISTIC ECHO PATTERNS WHICH ARE OBTAINED. THE TECHNIQUE MAY FIND USE IN THE LUMBER AND WOOD INDUSTRIES.

Download or read book High Resolution Ultrasonic Images for Defect Detection in Wood written by Elena Biagi and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Detection of Defects in Wood Chip Board by Means of Ultrasonic shadow Scanning Methods written by A. A. Pizhurin and published by . This book was released on 1979* with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Defect Detection in Wood Using an Ultrasonic Pulse Echo Method written by John Gerard Okyere and published by . This book was released on 1978 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Locating Lumber Defects by Ultrasonics written by Kent A. McDonald and published by . This book was released on 1969 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Honeycomb and Surface Check Dectection Using Ultrasonic Nondestructive Evaluation written by James J. Fuller and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Locating Lumber Defects by Ultrasonics written by and published by . This book was released on 1969 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Locating Defects in Softwood Lumber written by Kent Allen McDonald and published by . This book was released on 1971 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultrasonic Evaluation of Defects and Moisture Content of Lumber written by Hermanus H. van Dyk and published by . This book was released on 2004 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nondestructive Methods for Detecting Defects in Softwood Logs written by Kristin C. Schad and published by . This book was released on 1996 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wood degradation and defects, such as voids and knots, affect the quality and processing time of lumber. The ability to detect internal defects in the log can save mills time and processing costs. In this study, we investigated three nondestructive evaluation techniques for detecting internal wood defects. Sound wave transmission, x-ray computed tomography, and impulse radar were used to examine white spruce and balsam fir logs. Computed tomography resulted in the highest resolution for voids, knots, and high moisture content areas, but at a very high price. Both sound wave transmission and impulse radar were able to detect large voids and areas of degradation, and these techniques showed some sensitivity to very knotty logs. None of the methods was able to detect small pockets of decay. The use of radar requires an experienced operator because of the difficulty of interpreting the data.

Download or read book Lumber Defect Detection System written by and published by . This book was released on 2000 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a fact sheet on lumber defect detection system written for the NICE3 Program.

Download or read book Non Destructive Testing And Evaluation For Manufacturing And Construction written by H. Dos Reis and published by CRC Press. This book was released on 1989-12-01 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploring advances and strengthening communications among researchers in manufacturing and construction technologies, this book covers nondestructive testing and evaluation methods. Drawing on a wide range of experts, it provides insights from every sector of the field. Based on a three-day conference titled "Nondestructive Testing and Evaluation for Manufacturing and Construction" held on the campus of the University of Illinois at Urbana-Champaign, the papers presented in the book foster development of new and innovative methods.