Decreasing the structural-noise level when performing ultrasonic testing using antenna arrays
Source abstract
Abstract
To reduce the structural-noise level during ultrasonic testing using antenna arrays, an attempt was undertaken to implement a method for whitening echo signals with the further reconstruction of reflector images using the correlation or C-SAFT method. It is proposed to use the maximum-entropy (ME) method for reconstructing reflector images from measured echo signals. When performing numerical experiments for calculating the ultrasonic field in a medium with regions that were formed according to the principle of Voronoi diagrams, the finite-difference method in the time domain (FDTD) was used to numerically solve the vector wave equation. The attempt to use the echosignal whitening algorithm failed because of the poor conditionality of the system of linear algebraic equations, whereas the application of the ME method allowed the structural-noise level to be reduced by more than 6 dB.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Geophysical Methods and Applications · Ultrasonics and Acoustic Wave Propagation · Geotechnical and Geomechanical Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (23)
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