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http://dx.doi.org/10.9726/kspse.2016.20.4.026

Detection of Axial Defects in Pipes Using Chirplet Transform  

Kim, Young-Wann (Department of Mechanical Design Engineering, Chonnam National University)
Park, Kyung-Jo (Department of Mechanical Design Engineering, Chonnam National University)
Publication Information
Journal of Power System Engineering / v.20, no.4, 2016 , pp. 26-31 More about this Journal
Abstract
The implementation of chirplet transform to locate axially aligned defects in pipes has been investigated. The results are obtained from experiments performed on a carbon steel pipe using magnetostrictive sensors. Chirplet transform is applied to the reflected signal to separate the individual modes from dispersive and multimodal waveform. The separated modes are used to calculate reflection coefficients which would be used to characterize defects. It is found that the reflection from a defect consists of the wave pulses with gradually decaying amplitudes. Also the results show that the reflection coefficient initially increases with the crack length but finally reaches an oscillating regime.
Keywords
Axial Defect; Chirplet Transform; Mode Separation; Reflection Coefficient; Magnetostrictive Sensor;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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