Wood peeling process monitoring: a comparison of signal processing methods to estimate veneer average lathe check frequency
TypeArticles dans des revues avec comité de lecture
Experienced peeling operators are able to adjust the settings of their device by hearing the sound coming from the process. Based on this idea, a research program was undertaken to evaluate the possibility of using acoustic or vibration measurements supplying a support decision system to assist untrained operators. The present paper deals with lathe check phenomenon which is one of the most critical defects of veneer (leading to handling difficulties, excess of glue consumption, poor veneer surface quality, etc.). Several signal processing techniques giving a spectral representation of sensors measurements are compared. Finally, an original procedure based on Power Spectral Density ratio is proposed to measure the average lathe check frequency of the veneer during the process.
Showing items related by title, author, creator and subject.
Online control of wood peeling process: acoustical and vibratory measurements of lathe checks frequency DENAUD, Louis; BLERON, Laurent; RATLE, Alain; MARCHAL, Rémy (EDP Sciences, 2007)In the course of most wood machining processes, operators are usually able to detect various problems simply by hearing the sound emitted by the process. This is especially true for wood peeling. Lathe checks formation has ...
The effect of log heating temperature on the peeling process and veneer quality: beech, birch, and spruce case studies DUPLEIX, Anna; DENAUD, Louis; BLERON, Laurent; MARCHAL, Rémy; HUGHES, Mark (Springer, 2013)Heating green-wood prior to peeling is necessary to improve both peeling process and quality of veneer. This study investigates optimum heating temperatures by soaking of beech, birch and spruce. Experiments have studied ...
BLERON, Laurent; DENAUD, Louis; COLLET, Robert; MARCHAL, Rémy (Lavoisier, 2011)Since the test method for compression strength perpendicular to the grain was changed from a partial area to a full area loading test, strength values for softwood in EN 338 were significantly reduced. Consequently, a ...
PAŁUBICKI, Bartosz; MARCHAL, Rémy; BUTAUD, Jean-Claude; DENAUD, Louis; BLERON, Laurent; COLLET, Robert; KOWALUK, Grzegorz (Springer-Verlag, 2010)In the present paper, a novel method for veneer checks measurement and description based on digital image analysis is evaluated. According to this method, the camera is located sideways to the veneer allowing for viewing ...
Cutting Forces in basic and real life wood machining processes review, COST Action E35 2004-2008: Wood machining - Micromechanics and fracture MARCHAL, Rémy; MOTHE, Frédéric; DENAUD, Louis; THIBAUT, Bernard; BLERON, Laurent (De Gruyter, 2009)The data available in the literature concerning wood cutting forces permit to build models or to simulate the main wood machining processes (milling, sawing, peeling etc.). This approach contributes to a better understanding ...