Patent ID: 9155253
Filing Date: 2015-10-13
Classification: A01G,B27L,G01B

Abstract:
1. A method for the determination of a thickness of a cross-section (S) of a tree trunk received in a harvesting assembly, the method comprising: engaging the tree trunk with a pair of feed wheels used to feed the tree trunk through the harvesting assembly, with the feed wheels engaging opposite sides of the tree trunk along a first diameter corresponding to a first direction, abutting a delimbing knife against the tree trunk opposite a side of the tree trunk abutting an abutment surface, with the delimbing knife and abutment surface engaging diametrically opposite sides of the tree trunk essentially along a second diameter of the tree trunk corresponding to a second direction perpendicular to the first direction, detecting the positions of the feed wheels relative to one another as a measure of the first diameter of the tree trunk, detecting the position of the delimbing knife in relation to an abutment surface as a measure of second diameter of the tree trunk at right angle to the first diameter, and estimating the thickness of the cross-section of the tree trunk based on the first and second diameters, wherein the thickness is calculated as a diameter value in the form of a mean value of the first and second diameters.