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The effect of ultra...
The effect of ultrasound wave path estimation to defect characterization capability in half-skip total focusing method
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- Lei, Xiangyu (author)
- Chalmers university of technology, Gothenburg, Sweden,Department of Industrial and materials science; Chalmers University of Technology, Gothenburg (SWE)
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- Wirdelius, Håkan (author)
- Högskolan Väst,Avdelningen för avverkande och additativa tillverkningsprocesser (AAT),KAMPT
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- Carlson, Johan E., 1973- (author)
- Luleå tekniska universitet,Signaler och system,Division of Signals and systems; Lulea University of technology, Luleå (SWE)
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(creator_code:org_t)
- NDT.net, 2023
- 2023
- English.
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In: Research and Review Journal of Nondestructive Testing (ReJNDT). - : NDT.net. - 2941-4989. ; 1:1
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Abstract
Subject headings
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- The total focusing method (TFM) is a post-processing imaging technique applied on full matrix capture (FMC) ultrasonic inspection (UT) dataset. In TFM the ultrasonic wave energy is synthetically focused on every pixel in the image region of interest (ROI). In terms of half-skip TFM (HSTFM), wave mode conversion happens when the wave rebounds at interface, such as specimen backwall. This paper aims to propose and evaluate a method that involves Snell’s law to address accurate estimation of distanceof-flight (DOF) of wave propagation when wave mode conversion appears in HSTFM. This HSTFM algorithm is applied to both experimental and simulated FMC dataset that inspects a surface-breaking notch for notch image reconstruction. Comparisons between images with and without considering Snell’s law in wave mode conversion show visible difference that could lead to misinterpretations in characterizing the defect. The sensitivity of TFM to varying defect features such as defect tilt angle is also studied using simulated FMC datasets.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Bearbetnings-, yt- och fogningsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Manufacturing, Surface and Joining Technology (hsv//eng)
Keyword
- Signalbehandling
- Signal Processing
- Ultrasonic array; Total focusing method (TFM); Defect characterization
- Production Technology
Publication and Content Type
- ref (subject category)
- art (subject category)
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