TASK 4.5Evaluation of cutting process (CP) for the

determination of log/biomass “CP quality index”

Work Package 4: Multi-sensor model-based quality control of mountain forest production

Task 4.5: Cutting Process (CP) for the determination of

log/biomass “CP quality index”

Task Leader: CNRTask Partecipants: Kesla

Starting : October 2014Ending: November2015Estimated person-month = 4.00 (CNR) + 2.00 (Kesla)

CNR : will coordinate the research necessary, develop the knowledge base linking process and wood properties, recommend the proper sensor, develop software tools for computation of the CP quality index

Kesla : will provide expertise in regard to sensor selection and integration with the processor head + extensive testing of the prototype

Task 4.5: cutting process quality index

Deliverables

D.4.06 Establishing cutting power measurement protocolReport: This deliverable will contain a report and recommended protocol for collection of data chainsaw and delimbing cutting process.

Delivery Date: July 2015 (M.19)

D.4.11 Estimation of log quality by cutting power analysisPrototype: Numerical procedure for determination of “CP quality index” on the base of cutting processes monitoring

Delivery Date: November 2015 (M.23)

Task 4.5: cutting process quality index

Timing

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 3611.11.21.31.41.522.12.22.32.42.533.13.23.33.43.53.6

4

4.1

4.2

4.3

4.4

4.5

4.655.15.25.35.45.566.16.26.36.477.17.27.37.488.18.28.38.48.58.68.78.899.19.29.3

Task 4.5: cutting process quality index

Objectives

The goals of this task are:• to develop a novel automatic system for estimation of the cutting resistance of wood processed during harvesting• to use this information for the determination of log/biomass quality index

Task 4.5: cutting process quality index

Theory

The value of cutting forces is related to:

• wood density• cutting conditions• selected mechanical properties of wood (i.e. fracture toughness and shear modulus).

all regions in Poland

Task 4.5: cutting process quality index

Principles

The indicators of cutting forces:• energy demand• hydraulic pressure in the saw feed piston • power consumption

will be collected on-line and regressed to the known log characteristics.

http://www.youtube.com/watch?v=bZoq7PkyO-c

http://www.youtube.com/watch?v=XzaPvftspg0

Task 4.5: cutting process quality index

Chainsaw

Task 4.5: cutting process quality index

Delimbing systems

Task 4.5: cutting process quality index

Comments

The average density and mechanical resistance will be a result of the analysis of the chainsaw cutting process.

Estimation of the “CP-branch indicator” will be computed only in the case of delimbing on the processor head. In this case, it will be correlated to the “3D-branch indicator” determined from the 3D stem model of the original standing tree (T4.1).

The information will be forwarded to the server in real-time and will support final grading of logs.

Task 4.5: cutting process quality index

Challenges

What sensors are appropriate for measuring cutting forces in processor head?

load cell? tensometer? oil pressure? electrical current?

How to install sensors on the processor?

How reliable will be measurement of cutting forces in forest?

What is an effect of tool wear?

How to link cutting force (wood density) with recent quality sorting rules?

Delimbing or debarkining?

Thank you very much