Ultrasonic Guided-Wave Mode Identification in Pipe by Using Air-Coupled Transducer and Time-Frequency Analysis
2006 ◽
Vol 321-323
◽
pp. 804-807
◽
Keyword(s):
For efficient NDE of pipes, essential components of power plant facilities, ultrasonic guided waves were generated and received applying an air-coupled transducer and comb one as non-contact technology. Mode generation and selection were predicted based on theoretical dispersive curve and the element space of a comb transducer. In addition, a receiving angle of the air-coupled transducer was determined to acquire the predicted modes by theoretical phase velocity of each mode. Theoretical dispersive curve was compared with the results of the time-frequency spectroscopes based on the wavelet transform and 2D-FFT to identify the characteristics of the received mode. The received modes show a good agreement with the predicted ones.
2006 ◽
pp. 804-807
Keyword(s):
Warped Wigner-Hough Transform for Defect Reflection Enhancement in Ultrasonic Guided Wave Monitoring
2012 ◽
Vol 2012
◽
pp. 1-15
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2005 ◽
Vol 297-300
◽
pp. 2182-2186
2005 ◽
Vol 297-300
◽
pp. 2077-2082
Keyword(s):
Frequency-sweep examination for wave mode identification in multimodal ultrasonic guided wave signal
2014 ◽
Vol 61
(9)
◽
pp. 1515-1524
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Keyword(s):
2021 ◽
pp. 1-15
Keyword(s):