EMAT (Electromagnetic-Acoustic Transducer) System for Ultrasonic Velocity

Abstract

An EMAT system has been designed and constructed which can be used for wall thickness measurements on steel tubes with surface temperatures up to 650 C and for measurements of residual stress near to the inner surface of a 120 mm gun barrel. The system consists of an EMUS (Electromagnetic-Ultrasonic) transmitter/receiver instrument, a high temperature Electromagnetic-Acoustic Transducer (EMAT) for wall thickness measurements with normally incident shear waves using the pulse-echo-technique and a device consisting of one transmitting EMAT and two receiving EMATs which are collinearly integrated into a mechanical support for the transduction of Rayleigh waves that are travelling along the circumferential direction on the inner surface of a 120 mm gun tube.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1989
Accession Number
ADA212895

Entities

People

  • A. Wilbrand
  • H. J. Salzburger

Tags

Communities of Interest

  • Advanced Electronics
  • Human Systems

DTIC Thesaurus Topics

  • Accuracy
  • Bricks
  • Climate Change
  • Construction
  • Frequency
  • Gun Barrels
  • Heat Transfer
  • High Temperature
  • Magnet Coils
  • Materials
  • Measurement
  • Permanent Magnets
  • Rayleigh Waves
  • Residual Stress
  • Secondary Waves
  • Surface Temperature
  • Transducers

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Aerial Delivery - Logistics and Supply Chain Management.
  • ballistics.