NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Application of a dedicated micro-processor for automatic data acquisition of load strain and acoustic-emission dataThis 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 option. Typical results are presented for acoustic emission count rate and total count curves superimposed on stress-strain diagrams for boron/epoxy advanced composites.
Document ID
19760028286
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wilson, G. H.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Herakovich, C. T.
(Virginia Polytechnic Institute and State University Blacksburg, Va., United States)
Date Acquired
August 8, 2013
Publication Date
May 1, 1975
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Spring Meeting
Location: Chicago, IL
Start Date: May 11, 1975
End Date: May 16, 1975
Sponsors: Society for Experimental Stress Analysis
Accession Number
76A11252
Funding Number(s)
CONTRACT_GRANT: NGR-47-004-129
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available