An acousto-ultrasonics pattern recognition approach for damage detection under variable temperature conditions

Miguel Ángel Torres-Arredondo, Diego Alexander Tibaduiza-Burgos, Julian Sierra Perez

Resultado de la investigación: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

Resumen

Structural health monitoring (SHM) has emerged in the last few decades as an essential technology in order to improve the safety and maintainability of critical structures. Among the multiple techniques available for health monitoring, acoustoultrasonics (AU) offers the possibility of inspecting large areas of structures from a piezoelectric active sensor network with a relatively small number of sensors. Nevertheless, several points have to be taken into consideration before a robust method for damage detection can be developed. On the one hand, one of the major tasks for configuring an acousto-ultrasonics system is the selection of appropriate and robust signal processing and pattern recognition algorithms. On the other hand, the increase in complexity of the structures and variability in environmental and operational conditions makes damage detection an extremely challenging problem and points out the necessity for compensating these effects. This paper describes a health monitoring methodology combining the advantages of guided ultrasonic waves together with the compensation for temperature effects, the extraction of defect-sensitive features and sensor data-fusion for the purpose of carrying out a non-linear multivariate diagnosis of damage. Two-well known methods to compensate the temperature effects, namely Optimal Baseline Selection (OBS) and Optimal Signal Stretch (OSS), are investigated within the proposed methodology where the performance is assessed using Receiver Operating Characteristic (ROC) curves. Experimental results in a pipework demonstrate that the proposed methodology is a robust practical solution to compensate for temperature effects and improve the damage detection capabilities within the presented SHM system.

Idioma originalInglés
Título de la publicación alojadaStructural Health Monitoring 2015
Subtítulo de la publicación alojadaSystem Reliability for Verification and Implementation - Proceedings of the 10th International Workshop on Structural Health Monitoring, IWSHM 2015
EditoresFu-Kuo Chang, Fotis Kopsaftopoulos
EditorialDEStech Publications
Páginas767-774
Número de páginas8
ISBN (versión digital)9781605951119
DOI
EstadoPublicada - 2015
Evento10th International Workshop on Structural Health Monitoring: System Reliability for Verification and Implementation, IWSHM 2015 - Stanford, Estados Unidos
Duración: 1 sept. 20153 sept. 2015

Serie de la publicación

NombreStructural Health Monitoring 2015: System Reliability for Verification and Implementation - Proceedings of the 10th International Workshop on Structural Health Monitoring, IWSHM 2015
Volumen2

Conferencia

Conferencia10th International Workshop on Structural Health Monitoring: System Reliability for Verification and Implementation, IWSHM 2015
País/TerritorioEstados Unidos
CiudadStanford
Período1/09/153/09/15

Nota bibliográfica

Publisher Copyright:
Copyright © 2015 by DEStech Publica tions, Inc.

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