| Autor: |
Muravev, V V, Muraveva, O V, Strizhak, V A, Myshkin, Y V |
| Zdroj: |
IOP Conference Series: Materials Science and Engineering; October 2017, Vol. 253 Issue: 1 p012001-012001, 1p |
| Abstrakt: |
Acoustic path is analyzed and main parameters of guided wave testing are substanti- ated applied to pipes of small diameters. The method is implemented using longitudinal L(0,1) and torsional T(0,1) waves based on electromagnetic-acoustic (EMA) transducers. The method of multiple reflections (MMR) combines echo-through, amplitude-shadow and time-shadow methods. Due to the effect of coherent amplification of echo-pulses from defects the sensitivity to the defects of small sizes at the signal analysis on the far reflections is increased. An oppor- tunity of detection of both local defects (dents, corrosion damages, rolling features, pitting, cracks) and defects extended along the pipe is shown. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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