METHOD AND DEVICE FOR SELECTING AND AMPLIFYING WEAR-INDICATING SIGNALS BY ACOUSTIC EMISSION, AND USES THEREOF

The present invention relates to a method and a device for selecting and amplifying wear-indicating signals, and to the use thereof for monitoring the service life of a machining tool. This method utilises acoustic emission signals by an envelope detection technique and the auto-covariance function....

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Hauptverfasser:	VASCONCELOS, Wanderley Luiz, ANDRADE MAIA, Luís Henrique, MENDES ABRÃO, Alexandre, LANDRE JÚNIOR, Jánes
Format:	Patent
Sprache:	eng ; fre ; por
Schlagworte:	CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING
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creator	VASCONCELOS, Wanderley Luiz ANDRADE MAIA, Luís Henrique MENDES ABRÃO, Alexandre LANDRE JÚNIOR, Jánes
description	The present invention relates to a method and a device for selecting and amplifying wear-indicating signals, and to the use thereof for monitoring the service life of a machining tool. This method utilises acoustic emission signals by an envelope detection technique and the auto-covariance function. Maximising events by envelope detection and reducing noise by auto-covariance, this invention renders the signals more sensitive to tool wear, making it possible to detect the service life of tools, monitor materials subject to wear and follow faults. La présente invention concerne un procédé et un dispositif de sélection et d'amplification de signaux d'usure et son utilisation pour surveiller la durée de vie d'un outil d'usinage. Ce procédé utilise des signaux d'émission acoustique à l'aide d'une technique d'enveloppement et d'une fonction d'auto-covariance. En maximisant les événements par enveloppement et en réduisant les bruits par auto-covariance, l'invention rend les signaux plus sensibles à l'usure de l'outil, permettant ainsi de détecter la vie utile d'outils, de surveiller des matériaux sujets à une usure et de suivre les défaillances. A presente invenção se refere a um método e um dispositivo para selecionar e amplificar sinais de desgaste e seu uso no monitoramento do tempo de vida de uma ferramenta de usinagem. Tal método utiliza sinais de emissão acústica através da técnica de envelopamento e a função de autocovariância. Maximizando eventos por envelopamento e reduzindo ruídos por autocovariância, essa invenção torna os sinais mais sensíveis ao desgaste da ferramenta, permitindo detectar a vida útil de ferramentas, monitorar materiais sujeitos a desgaste e acompanhar falhas.
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subjects	CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS REGULATING
title	METHOD AND DEVICE FOR SELECTING AND AMPLIFYING WEAR-INDICATING SIGNALS BY ACOUSTIC EMISSION, AND USES THEREOF
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