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Title: Acoustic-velocity measurements in materials using a regenerative method

Abstract

Acoustic energy is propatated through earth material between an electro-acoustic generator and a receiver which converts the received acoustic energy into electrical signals. A closed loop is formed by a variable gain amplifier system connected between the receiver and the generator. The gain of the amplifier system is increased until sustained oscillations are produced in the closed loop. The frequency of the oscillations is measured as an indication of the acoustic propagation velocity through the earth material. The amplifier gain is measured as an indication of the acoustic attenuation through the earth materials. The method is also applicable to the non-destructive testing of structural materials, such as steel, aluminum and concrete.

Inventors:
Issue Date:
OSTI Identifier:
5704254
Application Number:
ON: DE83018037
Assignee:
ERA-08-054775; EDB-83-179035
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 42 ENGINEERING; ACOUSTIC TESTING; GEOLOGY; ACOUSTIC MEASUREMENTS; AMPLIFIERS; TRANSDUCERS; ELECTRONIC EQUIPMENT; EQUIPMENT; MATERIALS TESTING; NONDESTRUCTIVE TESTING; TESTING; 440300* - Miscellaneous Instruments- (-1989); 420500 - Engineering- Materials Testing

Citation Formats

Laine, E F. Acoustic-velocity measurements in materials using a regenerative method. United States: N. p., 1982. Web.
Laine, E F. Acoustic-velocity measurements in materials using a regenerative method. United States.
Laine, E F. Thu . "Acoustic-velocity measurements in materials using a regenerative method". United States.
@article{osti_5704254,
title = {Acoustic-velocity measurements in materials using a regenerative method},
author = {Laine, E F},
abstractNote = {Acoustic energy is propatated through earth material between an electro-acoustic generator and a receiver which converts the received acoustic energy into electrical signals. A closed loop is formed by a variable gain amplifier system connected between the receiver and the generator. The gain of the amplifier system is increased until sustained oscillations are produced in the closed loop. The frequency of the oscillations is measured as an indication of the acoustic propagation velocity through the earth material. The amplifier gain is measured as an indication of the acoustic attenuation through the earth materials. The method is also applicable to the non-destructive testing of structural materials, such as steel, aluminum and concrete.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {9}
}