2. Introduction to Search Unit Design

  1. Mark V. Brook

Published Online: 2 JUL 2012

DOI: 10.1002/9781118104781.ch2

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) Introduction to Search Unit 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.ch2

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:

  • piezoelectric crystals;
  • probe;
  • ultrasonic waves

Summary

The success of any ultrasonic inspection depends very much on the right selection of the search units or transducers, which generate, transmit, and receive ultrasonic waves and thus provide a considerable amount of information about existing reflectors in the test object. A search unit (or the more popular term probe ), consists not only of a transducer but also of other components, for example, a wedge, lens, or mirror, to redirect and shape the ultrasonic beam according to the inspection requirements. The main objective of the wedge is to transmit ultrasonic energy from the transducer through the interface with a test object to create in it an acoustic field suitable for a given inspection application. This chapter presents guidelines for selecting a transducer or a crystal assembly for a given inspection, or for writing specifications for their fabrication. It summarizes the main characteristics of currently used piezoelectric crystals.

Controlled Vocabulary Terms

piezoelectric materials; probes; ultrasonic transducers