Scientific Reports (Jul 2021)

Defect localization by an extended laser source on a hemisphere

  • Daniel Veira Canle,
  • Joni Mäkinen,
  • Richard Blomqvist,
  • Maria Gritsevich,
  • Ari Salmi,
  • Edward Hæggström

DOI
https://doi.org/10.1038/s41598-021-94084-w
Journal volume & issue
Vol. 11, no. 1
pp. 1 – 7

Abstract

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Abstract The primary goal of this study is to localize a defect (cavity) in a curved geometry. Curved topologies exhibit multiple resonances and the presence of hotspots for acoustic waves. Launching acoustic waves along a specific direction e.g. by means of an extended laser source reduces the complexity of the scattering problem. We performed experiments to demonstrate the use of a laser line source and verified the experimental results in FEM simulations. In both cases, we could locate and determine the size of a pit in a steel hemisphere which allowed us to visualize the defect on a 3D model of the sample. Such an approach could benefit patients by enabling contactless inspection of acetabular cups.