Development of Real Time Ultrasonic Imaging

Abstract

The paper investigates the real time imaging of corrosion and cracks on both the front and back surfaces of thin plate. A real time imaging system utilizing an innovative CCD camera to render sound waves visible is used in conjunction with ultrasonic transducers as illuminators to generate video pictures of discontinuities. Longitudinal and shear waves are investigated as means to detect corrosion of various severities. Samples were fabricated in a salt fog environment to simulate corrosion under painted surfaces. Fatigue cracks were grown using reversed bending apparatus. Experimental results and video results of inspection are presented.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1999
Accession Number
ADA375912

Entities

People

  • Bob Lasser
  • William R. Davis

Organizations

  • Naval Air Warfare Center

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Aerial Warfare
  • Aircraft Industry
  • Aircrafts
  • Aluminum
  • Cameras
  • Charge Coupled Devices
  • Corrosion
  • Discontinuities
  • Inspection
  • Materials
  • Mechanical Waves
  • Sound Waves
  • Transducers
  • Waves

Fields of Study

  • Physics

Readers

  • Image Processing and Computer Vision.
  • Structural Health Monitoring of Composite Structures.
  • Surface Coatings Technology.