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 language | English |
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Pages (from-to) | 1179-1184 |
Number of pages | 6 |
Journal | International Journal of Applied Electromagnetics and Mechanics |
Volume | 33 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 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