4. Dual Straight and Angle Beam Probe Design

  1. Mark V. Brook

Published Online: 2 JUL 2012

DOI: 10.1002/9781118104781.ch4

Ultrasonic Inspection Technology Development and Search Unit Design: Examples of Practical Applications

Ultrasonic Inspection Technology Development and Search Unit Design: Examples of Practical Applications

How to Cite

Brook, M. V. (2011) Dual Straight and Angle Beam Probe Design, in Ultrasonic Inspection Technology Development and Search Unit Design: Examples of Practical Applications, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9781118104781.ch4

Author Information

  1. West Hartford, Connecticut, USA

Publication History

  1. Published Online: 2 JUL 2012
  2. Published Print: 18 NOV 2011

ISBN Information

Print ISBN: 9780470874349

Online ISBN: 9781118104781

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Keywords:

  • angle beam probes;
  • dual straight beam probe;
  • longitudinal waves (L-wave);
  • shear wave (S-wave);
  • straight beam transducers;
  • wedge

Summary

The main purpose of using a dual straight beam probe is to eliminate the dead zone, which is typical for single crystal straight beam transducers. The principles of a wedge design for the dual straight beam probes are almost the same as for the angle beam probes. The only difference is in defining the refracted angle. The two important parameters to consider are the depth t of the central ray’s intersection with the central line of the probe, which approximately determines the point of maximum signal amplitude, and distance c, which will influence the crystal size. The performance of the dual straight beam probes can be characterized by their sensitivity curves. These curves are constructed experimentally and plotted as the signal amplitude versus the depth of a reflector. The dual angle beam probes are used for refracted shear wave (S-wave) or longitudinal waves (L-wave) generation in test objects.

Controlled Vocabulary Terms

elastic waves; probes; ultrasonic transducers