Acoustic emission analysis techniques for wireless sensor networks used for structural health monitoring

M. Krüger*, C. U. Grosse, J. H. Kurz

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Continuous structural health monitoring provides data from inside a structure and will help engineers to better understand the structural performance and to predict the durability and remaining life time of civil engineering structures. Failure of steel tendons and concrete cracking are important aspects of structural health and maintenance that could be determined by acoustic emission analysis techniques. Wired systems for acoustic emission analysis are still used to monitor structures today, but their installation is relatively expensive, vulnerable and time consuming. In this paper, acoustic emission techniques are presented that could be implemented into competitive wireless sensor networks. The acoustic emission analysis based on onset detection of the acoustic wave is one of the most common techniques for the localization of acoustic events. However, the onset detection requires high accuracy in time synchronization as well as high sampling rates of 100 kHz or even more. Both, high sampling rates and the high time accuracy require a lot of power. However, if wireless sensors will be used, power efficiency is very important. For that reason the array beamforming technique is presented in this paper. Array beamforming for acoustic emissions means that the direction of the approaching elastic wave is determined with an array of sensors. The theoretical background of this technique as well as first results obtained from tests with test specimens are shown and discussed in this paper.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Bridge Maintenance, Safety and Management - Bridge Maintenance, Safety, Management, Life-Cycle Performane and Cost
Pages873-874
Number of pages2
Publication statusPublished - 1 Dec 2006
Externally publishedYes
Event3rd International Conference on Bridge Maintenance, Safety and Management - Bridge Maintenance, Safety, Management, Life-Cycle Performance and Cost - Porto, Portugal
Duration: 16 Jul 200619 Jul 2006

Conference

Conference3rd International Conference on Bridge Maintenance, Safety and Management - Bridge Maintenance, Safety, Management, Life-Cycle Performance and Cost
CountryPortugal
CityPorto
Period16/07/0619/07/06

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality

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  • Cite this

    Krüger, M., Grosse, C. U., & Kurz, J. H. (2006). Acoustic emission analysis techniques for wireless sensor networks used for structural health monitoring. In Proceedings of the 3rd International Conference on Bridge Maintenance, Safety and Management - Bridge Maintenance, Safety, Management, Life-Cycle Performane and Cost (pp. 873-874)