Location

La Jolla, CA

Start Date

1979 12:00 AM

Description

This paper is based on a program to investigate the potential of multi-element annular arrays for practical application in ultrasonic testing systems. The annular array is comprised of coaxially-located, ring-shaped piezoelectric elements. By providing excitation pulses in a spherical time relationship, the transmitted beam may be focused at a specific range. By electronic switching, the focal point can be placed at various distances in the material under examination, Of particular interest is the length over which the beam can be held in collimation. Fabrication methods, delayed excitation techniques, and beam patterns in water and steel are described,

Book Title

Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE

Chapter

4. Reduction to Practice New Technology

Pages

55-62

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Annular Array Search Units and Their Potential Application in Conventional Ultrasonic Testing Systems

La Jolla, CA

This paper is based on a program to investigate the potential of multi-element annular arrays for practical application in ultrasonic testing systems. The annular array is comprised of coaxially-located, ring-shaped piezoelectric elements. By providing excitation pulses in a spherical time relationship, the transmitted beam may be focused at a specific range. By electronic switching, the focal point can be placed at various distances in the material under examination, Of particular interest is the length over which the beam can be held in collimation. Fabrication methods, delayed excitation techniques, and beam patterns in water and steel are described,