Ultrasonic Guided Wave Inspection with Array Sensors and its Applications
Ultrasonic guided wave becomes one of promising tool for monitoring various types of structures such as large steel plates, vessels, and pipes in oil, chemical or nuclear industry, because guided waves have ability to travel wide range of the target structure in a single position. However, analysis of guided wave signals acquired from structure is difficult on account of low S/N ratio and its dispersive nature. To improve S/N ratio and overcome dispersion effect, focusing techniques and imaging technique for array guided waves are needed. Thus, in this study, focusing techniques for array guided waves were developed in order to improve long range inspectability, and performance of the developed techniques was verified by experiments. Also, computed tomography has been applied for generating two dimensional images of plate-like structures in order to interpret guided wave signals easily using spatially distributed ultrasonic transducers. The results show the potentialities of computed tomography algorithm in practical fields.
Ultrasonic guided waves Wide-range inspection Focusing technique Computed tomography Pipes Plate-like structures
To Kang Hak-Joon Kim Sung-Jin Song
School of mechanical Engineering, Sungkyunkwan University, Suwon, Korea
国际会议
2nd China-Korea Ioint Workshop on Ultrasonic Nondestructive Evaluation(第二届中韩双边超声无损评估学术会议)
上海
英文
36-47
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）