You are here: Home
/ Publication Information
Title: Detection of defects in red oak deckboards by ultrasonic scanning
Author: Kabir, Mohammed F.; Schmoldt, Daniel L.; Schafer, Mark E.;
Source: Proceedings, 4th International Conference on Image Processing and Scanning of Wood. 89-96.
Publication Series: Miscellaneous Publication
Description: Experiments were conducted to detect defects in red oak (Quercus rubra, L.) deckboards by ultrasonic scanning. Scanning of the deckboards was carried out with two rolling transducers in a pitch-catch arrangement with pallet parts moving between the transducers at 70 ft/m and 220 ft/m. Data were collected, stored and processed using LabViewTM software. The defects examined were sound and unsound knots, bark pockets, holes, decay, and wane. Three deckboard samples (fresh cut and unplaned condition) were scanned for each defect type. Defects were characterized on the basis of time of flight, pulse energy, and pulse duration of the received signals. Results demonstrated that defected wood can be distinguished from clear wood by observing the variation in received signals. Ultrasonic signal parameters are more sensitive to unsound knots, decay, bark pockets, holes, and wane, compared to sound knots. This study demonstrates the feasibility of on-line inspection of green (high moisture content) and rough (unplaned) red oak deckboards.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
XML: View XML
Kabir, Mohammed F.; Schmoldt, Daniel L.; Schafer, Mark E. 2000. Detection of defects in red oak deckboards by ultrasonic scanning. Proceedings, 4th International Conference on Image Processing and Scanning of Wood. 89-96.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility