Generation of the Ultrasonic Guided Waves in a Seamless Stainless Steel Pipe Using an Array Transducer
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, 440-746 (Korea, Republic of)
- Korea Atomic Energy Research Institute, Daejon (Korea, Republic of)
- Department of Automotive Engineering, Woosuk University, Wanju (Korea, Republic of)
Ultrasonic guided waves have been widely employed for the long range inspection of structures such as plates, rods and pipes. In ultrasonic guided waves, however, there are numerous modes with different wave velocities, so that the generation and detection of the appropriate wave mode of the guided wave is one of key techniques in the application of guided waves. In the present work, mode tuning using an array transducer was investigated with the hardware implements to generate ultrasonic guided waves in a seamless stainless steel pipe. For this purpose, 8-channel ultrasonic pulser/receiver and their controller which enables sequential activation of each channels with given time delay were developed. A series of experiments was carried out in order to demonstrate the feasibility of dynamic tuning of modes by hardware: tuning the mode of the generated guided wave, group velocity measurement, tuned receiving and mode identification. As a result, the selective tuning of wave mode can be achieved by changing the time interval between adjacent elements of an array transducer.
- OSTI ID:
- 20655367
- 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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