Ultrasonic Pulse Signal Diffraction from Different Flaws in Elastic Media
作者单位：Institute of Metal Physics Ural Division of Russian Academy of Sciences
会议名称：《17th World Conference on Non-Destructive Testing》
会议日期：2008年
学科分类：08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 081102[工学-检测技术与自动化装置] 0811[工学-控制科学与工程]
关 键 词：Acoustic waves Reflectors Diffraction Instantaneous frequency Wavelets
摘 要：正The analysis of the processes of acoustic wave interaction with the reflectors of different shape located in an isotropic elastic medium has been carried *** analyze the changes of instantaneous frequency of reflected signals in time,the algorithm based on the use of the continuous wavelet transform was *** has been demonstrated that reflected signals can have the frequency modulation different from that in the probe ***,under certain conditions, the central frequency of the spectrum of reflected signal can differ noticeably from the value corresponding to the probe signal.