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Linear Receiving Array for Acoustic Imaging and Holography

  • G. C. Knollman
  • J. L. Weaver
  • J. J. Hartog

Abstract

A hydroacoustic receiver intended for use in ultrasonic imaging and holography is described. An experimental model contains a 16-element rectilinear array of PZT transducers. Voltage output of each element at 2.1 MHz is amplified separately to a level at which acoustic sensitivity is limited by amplifier noise rather than by switching transients of the multiplex circuit. Amplifier outputs are sampled sequentially by the multiplexer at a rate of 8000 elements/second to produce one line of video information. Acoustic images in nondestructive test and medical applications are obtained by translating or rotating either the array or the test specimen. Utilization of such array for ultrasonic visualization in nondestructive testing is discussed, and methods for receiver miniaturization by use of hybrid-circuit techniques are proposed.

Keywords

Nondestructive Test Linear Array Automatic Gain Control Acoustic Imaging Acceptance Angle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer Science+Business Media New York 1974

Authors and Affiliations

  • G. C. Knollman
    • 1
  • J. L. Weaver
    • 1
  • J. J. Hartog
    • 1
  1. 1.Lockheed Research LaboratoryPalo AltoUSA

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