A heuristic method for detecting and locating faults employing electromagnetic acoustic transducers

Carlos Quiterio Gómez Muñoz, Fausto Pedro García Márquez, Alfredo Arcos Jimenez, Liang Cheng, Maria Kogia, Abbas Mohimi, Mayorkinos Papaelias

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The objective of this paper is to demonstrate a novel signal processing for detection, identification and flaw sizing of structural damage using ultrasonic testing with Electromagnetic Acoustic Transducers (EMATs). Damage detection involves the recognition of a defect that exists within a structure. Damage location is the identification of the geometric position of the defect. Defect classification is the cluster of the damage type into multiple damage scenarios. In the absence of external interferences, a good measure of detectability of a flaw is its signal-to-noise ratio (SNR). Although the SNR depends on various parameters such as electronics used, material properties, e.g. homogeneity and damping, and flaw size, it can be improved using advanced signal processing. The main scientific novelties presented in this paper focus on filtering signal noise through advanced digital signal processing; incorporating wavelet transforms for image and signal representation enhancements; investigating multi-parametric analysis for noise identification and defect classification; studying attenuation curves properties for defect localisation improvement and flaw sizing and location algorithm development.
Original languageEnglish
Pages (from-to)493-500
JournalEksploatacja i Niezawodnosc
Volume19
Issue number4
Publication statusPublished - 18 Sep 2017

Keywords

  • fault detection and diagnosis
  • electromagnetic acoustic transducers (EMAT)
  • wavelet transforms
  • non destructive tests
  • guided waves

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