An Automatic Mode Separation Technique for Multimodal Guided Wave Analysis
Publish Year: 1392
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
INCWI14_015
تاریخ نمایه سازی: 13 بهمن 1398
Abstract:
Ultrasonic Guided Wave inspection is one of the most recent approaches of Non-Destructive Testing. The greatest challenge for any guided wave system is the plethora of wave modes arising from the complex geometry of the structural element which propagate with a range of frequency dependent velocities. As a result, multiple wave modes reflected by discontinuities in the structural element are combined to confuse the inspection. In this paper an automatic, novel signal processing technique is presented using a dispersion simulation and two dimensional subtractive search. The technique is applied to modeling data in order to separate superposed guided wave signals in time domain and derive the exact time of flight for individual wave modes
Keywords:
Structural Health Monitoring (SHM) , Guided Waves , Long Range Ultrasonic Testing (LRUT) , Non-Destructive Testing (NDT) , Wave Mode Separation.
Authors
Sina Fateri
Centre for Electronic Systems Research (CESR), Brunel University, Kingston Lane, London, United Kingdom,