Objective The aim of the project is to investigate and develop new techniques for the quality assessment of wood based composite products and solid wood. In particular, the tasks of the project will be: The development and implementation of a modern concept for an interactive production system based on in line measurements of density profiles in wood composite boards. The first step will be to establish the relationship between board quality and density profile across the thickness of the board, which will include a control strategy and an internal information exchange concept in order to automate and document the complete process. In parallel, two nondestructive measuring methods, based on the ultrasound technique and the radio frequency technique respectively will be developed in order to determine density profiles across the thickness of panel boards. The results will be used to provide an in-line measuring technique which can be integrated into a feedback system based on the process control system developed. On-line measurement of the vibrational behaviour of particleboard for material characterization. The goal is to establish a relationship between the natural frequencies measured in the manufactured boards under restricted oscillation conditions and the minimum quality required for these boards in terms of elasticity, which would allow the quality control of particleboards in the production chain. Previous research in this field has proved the possibility of achieving a dynamic plate identification of free boundary conditions on the basis of resonance frequency measurements. However, a direct method will be a vibration measurement in a clamped part of a just pressed particleboard. With this technique it will be possible to measure immediately after the board has left the press without the need to have clear sawn edges. Therefore the research will be focused on the interpretation of the dynamic behaviour of the vibrating part of the plate by developing an efficient technique for clamping in one or two edges, this being done in combination with the developed dynamic plate characterisation system and in respect of the evaluation of the four-clamped edges. Improvement of a visual inspection system for wood surfaces in order to detect defects altering the aspect and/or the machinability. Firstly, the research will be focused on the characterization and modelling of the following defects: image recording and digitization; preprocessing and detection of suspicious image regions; clustering of these image regions; evaluation of geometrical features and/or features related to grey values; classification of characteristics. For step 5, specific image processing algorithms must be developed. After this characterization, the project will investigate the correlation between data obtained from other sensors such as ultrasound and microwave devices. For each defect an analysis of the overlapping field will determine the contribution of the two techniques to increase or decrease their characterization. The exploitation of the two pieces of information needs the definition of fusion rules. Therefore notions of priority, additivity, logical operations will be established and carried out on a set of predefined samples. Finally, the research will be focused on the development of a prototype vision system. The criteria for an appropriate image processing system that will be considered are modular design and architecture of hardware and software, real time ability, flexible image format and reprocessing capacity. Application of ultrasonic measurements for defect detection and structural timber grading. The research will be focused on two wood materials highly concerned with detection of internal fractures: solid wood as it has to be evaluated before it can be processed, and glued laminates whose resistance is intimately linked to the integrity of the glue lines and to the presence of cracks. Fields of science engineering and technologyelectrical engineering, electronic engineering, information engineeringinformation engineeringtelecommunicationsradio technologyradio frequencyengineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringcontrol systemsengineering and technologyelectrical engineering, electronic engineering, information engineeringelectronic engineeringsensorsagricultural sciencesagriculture, forestry, and fisheriesforestrynatural sciencesphysical sciencesacousticsultrasound Programme(s) FP2-FOREST - Specific research and technological development programme (EEC) in the fields of raw materials and recycling - Renewable raw materials: Forestry and wood products (including cork) -, 1990-1992 Topic(s) Data not available Call for proposal Data not available Funding Scheme CSC - Cost-sharing contracts Coordinator Dansk Teknologisk Institut EU contribution No data Address Gregersensvej 2630 Taastrup Denmark See on map Total cost No data Participants (8) Sort alphabetically Sort by EU Contribution Expand all Collapse all CENTRE TECHNIQUE DE L'INDUSTRIE DU BOIS Belgium EU contribution No data Address 830,Allee Hof ter Vleest 1070 BRUXELLES See on map Total cost No data Centre Regional de l'Innovation et du Transfert des Technologies pour les Industries du Bois France EU contribution No data Address Allée des Hêtres 88000 Epinal See on map Total cost No data Centre Technique du Bois et de l'Ameublement France EU contribution No data Address Rue de Blenod Maidières 54700 Pont-à-Mousson See on map Total cost No data Consiglio Nazionale delle Ricerche (CNR) Italy EU contribution No data Address Via F. Biasi 75 38010 Trento - San Michele all'Adige See on map Total cost No data Enterprise Ireland - Trading as Bioresearch Ireland Ireland EU contribution No data Address Ballymun Road - Glasnevin 9 Dublin See on map Total cost No data FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. Germany EU contribution No data Address Bienroder Weg 54 E 38108 BRAUNSCHWEIG See on map Total cost No data Fachhochschule Hildesheim - Holzminden Germany EU contribution No data Address Hohnsen 1 31134 Hildesheim See on map Total cost No data Universität Hamburg Germany EU contribution No data Address Leuschnerstraße 91 21031 Hamburg See on map Total cost No data
