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Title: Locating interfaces in vertically-layered materials and determining concentrations in mixed materials utilizing acoustic impedance measurements

Abstract

Measurement of the relative and actual value of acoustic characteristic impedances of an unknown substance, location of the interfaces of vertically-layered materials, and the determination of the concentration of a first material mixed in a second material are disclosed. A highly damped ultrasonic pulse is transmitted into one side of a reference plate, such as a tank wall, where the other side of the reference plate is in physical contact with the medium to be measured. The amplitude of a return signal, which is the reflection of the transmitted pulse from the interface between the other side of the reference plate and the medium, is measured. The amplitude value indicates the acoustic characteristic impedance of the substance relative to that of the reference plate or relative to that of other tested materials. Discontinuities in amplitude with repeated measurements for various heights indicate the location of interfaces in vertically-layered materials. Standardization techniques permit the relative acoustic characteristic impedance of a substance to be converted to an actual value. Calibration techniques for mixtures permit the amplitude to be converted to the concentration of a first material mixed in a second material. 6 figs.

Inventors:
Issue Date:
OSTI Identifier:
7246017
Patent Number(s):
4403508 A
Application Number:
PPN: US 6-272227
Assignee:
PTO; EDB-94-125131
DOE Contract Number:  
AC06-77RL01030
Resource Type:
Patent
Resource Relation:
Patent File Date: 10 Jun 1981
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; COMPOSITE MATERIALS; INTERFACES; ULTRASONIC TESTING; TANKS; CALIBRATION; MEASURING METHODS; ACOUSTIC TESTING; CONTAINERS; MATERIALS; MATERIALS TESTING; NONDESTRUCTIVE TESTING; TESTING; 420500* - Engineering- Materials Testing

Citation Formats

Langlois, G.N. Locating interfaces in vertically-layered materials and determining concentrations in mixed materials utilizing acoustic impedance measurements. United States: N. p., 1983. Web.
Langlois, G.N. Locating interfaces in vertically-layered materials and determining concentrations in mixed materials utilizing acoustic impedance measurements. United States.
Langlois, G.N. Tue . "Locating interfaces in vertically-layered materials and determining concentrations in mixed materials utilizing acoustic impedance measurements". United States.
@article{osti_7246017,
title = {Locating interfaces in vertically-layered materials and determining concentrations in mixed materials utilizing acoustic impedance measurements},
author = {Langlois, G.N.},
abstractNote = {Measurement of the relative and actual value of acoustic characteristic impedances of an unknown substance, location of the interfaces of vertically-layered materials, and the determination of the concentration of a first material mixed in a second material are disclosed. A highly damped ultrasonic pulse is transmitted into one side of a reference plate, such as a tank wall, where the other side of the reference plate is in physical contact with the medium to be measured. The amplitude of a return signal, which is the reflection of the transmitted pulse from the interface between the other side of the reference plate and the medium, is measured. The amplitude value indicates the acoustic characteristic impedance of the substance relative to that of the reference plate or relative to that of other tested materials. Discontinuities in amplitude with repeated measurements for various heights indicate the location of interfaces in vertically-layered materials. Standardization techniques permit the relative acoustic characteristic impedance of a substance to be converted to an actual value. Calibration techniques for mixtures permit the amplitude to be converted to the concentration of a first material mixed in a second material. 6 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {9}
}