Extraction of crack indications from ECT signals using signal phase characteristics of a multi-coil probe

Toshihiro Yamamoto, Toshiyuki Takagi, Tetsuya Uchimoto

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

This paper proposes a method to reduce noise and extract crack indications from detection signals of a 48-channel ECT system based on its signal phase characteristics. Because this 48-channel ECT system performs two kinds of scanning patterns: U-scan and T-scan, and obtains two sets of signal distributions for one scanning area simultaneously, the proposed method uses a two-stage process that includes so-called main filter and sub filter. Using these two filters imposes more strict conditions on extracting crack indications so as to reduce more noise. The experimental results show that the proposed filtering method is effective to extract only crack indications from detection signals including complicated noises.

Original languageEnglish
Pages (from-to)1179-1184
Number of pages6
JournalInternational Journal of Applied Electromagnetics and Mechanics
Volume33
Issue number3-4
DOIs
Publication statusPublished - 2010

Keywords

  • Nondestructive inspection
  • crack detection
  • eddy current testing
  • noise reduction
  • phase characteristics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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