Spectral Redundancy in Characterizing Scatterer Structures from Ultrasonic Echoes

نویسندگان

  • Kevin D. Donohue
  • Tomy Varghese
  • Nihat M. Bilgutay
چکیده

Broadband ultrasonic back-scattered energy contains information regarding material structures from which it was scattered. Signal processing techniques use characteristic changes in the back-scattered signals to detect scatterers or reflectors that represent flaws and impurities within a manufactured part. A-scans from materials such as stainless steel, titanium, and composites comprised of dense layers or fibers, exhibit significant scattered energy at positions throughout the material. Consequently, signal processing methods are needed to filter out signals characteristic of normal material echoes and enhance echoes from defective structures.

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تاریخ انتشار 2008