Jakub Sandak
Anna Sandak
Stefano Marrazza
Gianni Picchi
2019-03-06
<p>Forest operations are in constant development to provide increasingly higher standards of<br>
economic and environmental sustainability. The latest innovation trends are concentrated in<br>
the generation, storage and management of data related to the harvesting process, timber<br>
products and logistics operations. Current technologies provide productivity and position, but<br>
only physical parameters are made available for timber products. The possibility of providing<br>
a comprehensive quality evaluation of roundwood early in the supply chain and linking the<br>
information to each log provides a new tool for optimization of the whole forest-timber supply<br>
chain. Current in-field methods for grading logs are based on visual rating scales, which are<br>
subjective, operator-dependent and time-consuming. As an alternative, a sensorized processor<br>
head was developed, featuring the following sensors: near infrared (NIR) spectrometer and<br>
hyperspectral cameras to identify surface defects, stress wave and time of flight sensors to<br>
estimate timber density, hydraulic flow sensor to estimate cross-cutting resistance and delimbing<br>
sensors to estimate branches number and approximate position. The prototype also deployed<br>
an RFID UHF system, which allowed the identification of the incoming tree and individually<br>
marked each log, relating the quality parameters recorded to the physical item and<br>
tracing it along the supply chain. The tested sensors were installed and designed to be independent,<br>
nevertheless, their integrated use provides a comprehensive evaluation of timber<br>
quality. This paper presents the technical solutions adopted, the main hindrances found and<br>
some preliminary results of the operative prototype as tested in laboratory and in forest operational<br>
conditions.</p>
https://doi.org/10.5281/zenodo.2585761
oai:zenodo.org:2585761
issn:1845-5719
Zenodo
https://zenodo.org/communities/innorenew
https://zenodo.org/communities/eu
https://doi.org/10.5281/zenodo.2585760
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Croatian journal of forest engineering, 40(1), 25-37, (2019-03-06)
timber quality
processor head
sensors
NIR
cutting forces
Development of a Sensorized Timber Processor Head Prototype – Part 1: Sensors Description and Hardware Integration
info:eu-repo/semantics/article