Use of Homomorphic Filtering for Upgrading Flaw Imaging in the Expert Examination of Welded Joints of Atomic Power Plant Pipelines
Source abstract
Abstract
The possibility of using homomorphic filtration of ultrasonic echo signals, as a preliminary data processing method, for upgrading the flaw images obtained during coherent echo-signal processing is considered. Homomorphic filtration makes it possible to attenuate the effect of multiplicative noises appearing in the data recording, such as variation of the acoustic contact or the rough surface of the tested object. Obtaining of the images consists of the following stages: calculation of holograms on the basis of measured echo signals, taking the logarithm of the calculated holograms, determination of the hologram spectrum, projection operation in the spectral space, and the Fourier transform. The results of the practical use of homomorphic filtration for expertise of flaw dimensions in austenite welded joints of 325 × 15-mm stainless-steel pipelines are given.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Engineering Diagnostics and Reliability · Material Properties and Failure Mechanisms · Ultrasonics and Acoustic Wave Propagation
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References (12)
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