Wood peeling process monitoring: a comparison of signal processing methods to estimate veneer average lathe check frequency
Article dans une revue avec comité de lecture
Auteur
BLERON, LaurentEYMA, FlorentMARCHAL, Rémy 
DENAUD, LouisRésumé
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.
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Article dans une revue avec comité de lecture; ; ; ;DENAUD, Louis (Springer Verlag, 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 ...
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Article dans une revue avec comité de lecture; ;DENAUD, Louis; COLLET, Robert (Taylor & Francis, 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 ...
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Article dans une revue avec comité de lecture; ; ; ; ;DENAUD, Louis; COLLET, Robert (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 ...
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Article dans une revue avec comité de lecture; ; ; ;DENAUD, Louis (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 ...
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Article dans une revue avec comité de lecture; ; ;DENAUD, Louis (Springer Nature (since 2011)/EDP Science (until 2010), 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 ...