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Ultrasonic frequency analysisTechnique is used for evaluation and characterization of materials, fluids, and biological tissue. Method eliminates problem of electrical drive pulse shape by slaving tracking generator to local oscillator of spectrum analyzer. Logic/timing generator is used to control pulse transmission and receiving sequence, pulse width, and pulse repetition rate.
Document ID
19800000377
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Cantrell, J. H.
Heyman, J. S.
Date Acquired
August 10, 2013
Publication Date
January 1, 1981
Publication Information
Publication: NASA Tech Briefs
Volume: 5
Issue: 3
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
ISSN: 0145-319X
Report Number: LAR-12697
LAR-12697
Accession Number
80B10377
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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