Improving Ultrasonic C-Scan Resolution Using the Hilbert-Huang Transform
Journal Article
·
· AIP Conference Proceedings
- Department of Mechanical Engineering, Tufts University, Medford, MA 02155 (United States)
The Hilbert Huang Transform (HHT) is applied to ultrasonic mapping of simulated defects in an aluminum plate. C-Scanning tests are conducted using pulse-echo ultrasound on a water-immersed aluminum plate containing a matrix of 16 unevenly-spaced flat-bottomed holes. After decomposing the time-gated echo waveforms into simpler waveforms with HHT, the Hilbert transform is applied and a single RMS parameter derived for every transducer location. HHT provides good capability for sizing and locating defects and excellent defect/non-defect contrast. There are clear implications for improved mapping of more subtle defects.
- OSTI ID:
- 20655395
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 760; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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