Estimating accuracy of measuring length of round timber produced in logging by working with harvester

Abstract

Analyzing in forestry prepared round timber, it has been found that the accuracy of the measurement of length is due both to the unbundling of assortment in timber processing plants and the irrational absorption of prepared tree trunks. Researches have been conducted in the need for calibration of the harvester working mechanism, but there is no research on the effect of the length measuring roller on the length of the assortment precision. The aim of the work is to determine the impact of the assortment length measuring roller on the measurement accuracy. These researches are made in the year of 2016 in different seasons,using a harvester working mechanism with interchangeable three-roller shapes.In the research 1696 assortments were gauged. During the processing of the data obtained, a precision roller was determined for measuring the length, which ensures the minimum length inaccuracy throughout the year. It has been found that the tree species, annual seasonality and the planned length of assortments influence the accuracy of measuring the length regardless of the shape of the roller. In each situation it is advisable to use the most appropriate form of the measuring roller.