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Data Acquisition System for Computer Aided Coherent Acoustic Imaging

  • John P. Powers
  • Major Reid Carlock
  • USMC and LT Rod Colton, USN
Part of the Acoustical Imaging book series (ACIM, volume 9)

Abstract

A coherent acoustical imaging is under design and test. This system utilizes precisely spaced samples of the amplitude and phase of an ultrasonic field as data input for the computer processing and display sub-system. Two designs of the data acquisition system are described: one a raster scan and the other a single sweep of a linear array. Design goals are to achieve a 256 × 256 array of amplitude and phase data recorded on a digital cassette recorder. Both techniques use microprocessor control of the data flow and sampling. The relatively slow motion of the raster scan presents few problems in achieving results and control was easily implemented with an 8748 microprocessor. The speed requirement in sampling, measuring and converting the data in the linear array case however present a more difficult challenge requiring a more complex microprocessor system described in detail in the paper.

Keywords

Linear Array Phase Detector Ultrasonic Field Naval Postgraduate School Microprocessor System 
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

  1. 1.
    J. P. Powers, J. R. Y. De Biois, R. T. O’Bryon and J. W. Patton, “A Computer Aided Ultrasonic Imaging System” Acoustical Holography Vol. 8, A. F. Metherell, Ed, pp. 233–248, Plenum Press, New York, 1979.Google Scholar
  2. 2.
    R. A. Colton, “A Microprocessor-based Digital Data Acquisition Controller for a Computer Aided Acoustic Imaging System”, Master’s Thesis, Naval Postgraduate School, Monterey, California, 1979 (Available from Defense Documentation Center, Alexandria, VA 22314).Google Scholar
  3. 3.
    R. O. Carlock, “Analog and Digital Hardware Development for a Microcomputer Controlled Data Acquisition System for Acoustical Imaging” Master’s Thesis, Naval Postgraduate School, Monterey, California, 1979. (Available from the Defence Documentation Center, Alexandria, VA 22314).Google Scholar
  4. 4.
    Electronic Circuit Designer’s Casebook, p 38, Electronics, McGraw Hill.Google Scholar

Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • John P. Powers
    • 1
  • Major Reid Carlock
    • 1
  • USMC and LT Rod Colton, USN
    • 1
  1. 1.Department of Electrical EngineeringNaval Postgraduate SchoolMontereyUSA

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