LASCAN – A LASER-BASED LOG-MEASUREMENT SYSTEM
G. Schimmel, G. Krippner, H. Thim
Abstract:
KEBA - Sawmill-Automation and the Microelectronics Institute of the Johannes Kepler University of Linz developed a new low-cost-system for measuring the diameter of a log with mm resolution. The system utilizes two laser beams forming an angle of 90°. Each of them is scanned by a rotating polygon mirror towards a retroreflector located in a distance of about 2 meters. Each retro-reflected laser beam is detected by a large-area photo diode mounted near the polygon mirror. An object (log) hit by the scanning laser beams produces for a certain time a shadow on the two reflectors and, hence, on the photo diodes which in turn generate high/low/high-signals. A signal processor converts these signals into the required geometrical data. The system called LASCAN is capable of measuring diameter and position of a log at high speed. The obtained data enable the sawmill to deliver to the customer the requested log with an opimized cut at a low prize.
Keywords:
sawmill automation, measurement of geometrical quantities, laser
Download:
IMEKO-WC-2000-TC14-P401.pdf
DOI:
-
Event details
Event name:
XVI IMEKO World Congress
Title:

Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future

Place:
Vienna, AUSTRIA
Time:
25 September 2000 - 28 September 2000
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