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Elaboration of some signal processing algorithmsin ultrasonic techniques: application to materialsNDT

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Ultrasonics

Volume 38, Issue 1-8, 2000, Pages 503-507

Elaboration of some signal processing algorithms in ultrasonic techniques: application to materials

NDT

Redouane DRAI, F. SELLIDJ, Mohamed KHELIL, Amar BENCHAALA

Abstract: In ultrasonic techniques, information on defect characterization possibilities has required more evolved technique development than classical methods. To obtain a high probability of defect detection, these methods use signal-processing algorithms in order to enhance the signal-to-noise ratio. These methods are also used to discriminate between planar and volumetric defects. In this paper, some signal-processing algorithms are developed and implemented on a computer to allow their utilization in real-time processing of ultrasonics NDT results.

Keywords : Cross-correlation function, Hilbert transform, NDT, Split spectrum techniques, Ultrasonics

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