Experimental Mechanics

, Volume 16, Issue 3, pp 111–115 | Cite as

Application of a microprocessor for acquisition of load, strain and acoustic-emission data

A dedicated microprocessor is used to store data on digital tape and then transmit it to a large computer for plotting. Data-processing time is reduced by a factor of 15–20
  • G. H. Wilson
  • C. T. Herakovich


This paper describes an automatic system for acquisition, logging and analysis of stress, strain and acoustic-emission data. The complete system is a combination of several standard items of equipment and a newly developed intelligent data logger which has the capability to send data directly to a large-scale computer for reduction and plotting. The data logging and all interfacing with peripheral equipment are accomplished using digital electronics. The heart of the system is a four-bit microprocessor and digital cassette-tape unit. The system, which is controlled by instructions from a cathode-ray-tube terminal, has the capability to transmit data from the cassette unit to a large computer via a time-sharing aption.

Typical results are presented for acoustic-emission count rate and total-count curves superimposed on stress-strain diagrams for boron/epoxy advanced composites.


Mechanical Engineer Fluid Dynamics Count Rate Data Logger Automatic System 
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  1. 1.
    Wilson, III, G. H., “A Microprocessor-Based System for Laboratory Data Acquisition,”M. S. Thesis, Virginia Polytechnic Institute and State University, Blacksburg, VA (June, 1975).Google Scholar
  2. 2.
    Henneke, II, E. G., Herakovich, C. T., Jones, G. L., andRenieri, M. P., “Acoustic Emission from Composite-reinforced Metals,”Experimental Mechanics,15 (1),10–16 (January 1965).Google Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 1976

Authors and Affiliations

  • G. H. Wilson
    • 1
  • C. T. Herakovich
    • 1
  1. 1.Department of Engineering Science and Mechanics of Virginia Polutechnic Institute and State UniversityBlacksburg

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