A Counter Gating Circuit for Acoustic Emission Monitoring of Structures Cracking under Repetitive Alternating Loads

Abstract

A circuit for gating the input to an electronic counter used in the acoustic emission monitoring of cyclically loaded propagating cracks is described. The circuit ensures that acoustic emission signals registered by the counter arise principally from propagating cracks and that the counting of extraneous signals such as those occurring as a result of rubbing and fretting of contracting surfaces are minimised. Keywords: Crack propagation; Acoustic emissions; Gating(synchronizing); Cyclic loads, Australia. (edc)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1989
Accession Number
ADA215764

Entities

People

  • M. R. Kindermann

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Air Force
  • Aircraft Maintenance
  • Aircrafts
  • Airframes
  • Chemical Engineering
  • Emission
  • Engineering
  • Frequency
  • Frequency Bands
  • Materials
  • Materials Engineering
  • Mechanical Engineering
  • New England
  • Resonant Frequency
  • Transducers
  • United States

Readers

  • Integrated Circuit Design and Technology.
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems