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Related Concept Videos

Ultrasonography01:17

Ultrasonography

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Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
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Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
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Ultrasonic defect characterization using parametric-manifold mapping.

A Velichko1, L Bai1, B W Drinkwater1

  • 1Department of Mechanical Engineering, University of Bristol, Queens Building, University Walk, Bristol BS8 1TR, UK.

Proceedings. Mathematical, Physical, and Engineering Sciences
|July 11, 2017
PubMed
Summary
This summary is machine-generated.

Ultrasonic non-destructive evaluation can characterize defects by analyzing scattering behavior. This method extracts crucial information from measurements, improving structural integrity assessments.

Keywords:
defect characterizationparametric manifoldultrasonic non-destructive testing

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Acoustics

Background:

  • Structural integrity in safety-critical systems relies on accurate defect detection and characterization.
  • Understanding defect nature is crucial for assessing structural integrity.
  • Defect characterization typically involves estimating parameters from measured data.

Purpose of the Study:

  • To explore defect characterization using ultrasonic scattering behavior.
  • To determine the extent of characterization information available from ultrasonic measurements.
  • To understand the nature of this information and its implications for defect characterization performance.

Main Methods:

  • Utilizing ultrasonic scattering behavior for defect characterization.
  • Projecting ultrasonic measurements onto a parametric manifold in principal component space.
  • Analyzing far-field harmonic ultrasound measurements.

Main Results:

  • Characterization information can be extracted by projecting measurements onto a parametric manifold.
  • This manifold encapsulates all available characterization information from far-field harmonic ultrasound.
  • Experiments with surface-breaking cracks and elliptical voids showed good agreement between actual and characterized parameters.

Conclusions:

  • The parametric manifold approach provides definitive statements on defect characterization performance.
  • The nature of the manifold explains why some defects are easier to characterize than others.
  • This method enhances the assessment of structural integrity through improved defect understanding.