LASCAN – A LASER-BASED LOG-MEASUREMENT SYSTEM

• 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:

  _unreg_wc-2000.401

Event details:

• IMEKO TC:
• 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