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Title: Combining Complementary Scanning Methods to Improve Log Defect Detection

Source: USDA Forest Service, Forest Products Laboratory, Madison, Wisconsin, Research In Progress FPL-RIP-4719-025

Author(s): Forest Products Laboratory

Publication Year: 2014  View PDF »

Related Publications: view

Category: Research In Progress

Abstract: High-resolution laser surface scanning of hardwood logs provides detailed imagery from which log surface defects can be located, classified, and measured. These data can be used to generate internal defect maps of logs and predict quality and value of lumber and other products. However, a system based entirely on log surface inspection may incorrectly predict internal quality. Some defects give the appearance of being solid or sound and effectively hide an unsound or rotten area, thereby reducing the accuracy of predicted internal product quality and value. On the other hand, acoustic wave propagation methods are very accurate at determining the soundness of a log but provide no data about defect locations. Combining the two approaches could yield a system that can accurately determine exterior defects and interior soundness.

Keywords: Hardwood; logs; laser scanning; acoustic wave; NDT

File size: 588 kb(s)

Date posted: 10/15/2014

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