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

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Academic year: 2021

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Ultrasonics

DOI : 10.1016/S0041-624X(99)00082-7

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

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

Welding and NDT Research Center (CSC), BP 64, Cheraga, Algeria

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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