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Title: Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase

Abstract

A chemical or intrinsic physical property sensor is described comprising: (a) a substrate; (b) an interaction region of said substrate where the presence of a chemical or physical stimulus causes a detectable change in the velocity and/or an attenuation of an acoustic wave traversing said region; and (c) a plurality of paired input and output interdigitated electrodes patterned on the surface of said substrate where each of said paired electrodes has a distinct periodicity, where each of said paired electrodes is comprised of an input and an output electrode; (d) an input signal generation means for transmitting an input signal having a distinct frequency to a specified input interdigitated electrode of said plurality so that each input electrode receives a unique input signal, whereby said electrode responds to said input signal by generating an acoustic wave of a specified frequency, thus, said plurality responds by generating a plurality of acoustic waves of different frequencies; (e) an output signal receiving means for determining an acoustic wave velocity and an amplitude of said acoustic waves at several frequencies after said waves transverses said interaction region and comparing these values to an input acoustic wave velocity and an input acoustic wave amplitude tomore » produce values for perturbations in acoustic wave velocities and for acoustic wave attenuation as a function of frequency, where said output receiving means is individually coupled to each of said output interdigitated electrode; (f) a computer means for analyzing a data stream comprising information from said output receiving means and from said input signal generation means to differentiate a specified response due to a perturbation from a subsequent specified response due to a subsequent perturbation to determine the chemical or intrinsic physical properties desired.« less

Inventors:
;
Publication Date:
OSTI Identifier:
6292409
Patent Number(s):
US 5235235; A
Application Number:
PPN: US 7-705408
Assignee:
Dept. of Energy, Washington, DC (United States) SNL; EDB-93-122107
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Resource Relation:
Patent File Date: 24 May 1991
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 47 OTHER INSTRUMENTATION; MATERIALS; CHEMICAL PROPERTIES; PHYSICAL PROPERTIES; MEASURING INSTRUMENTS; DESIGN; ACOUSTIC MEASUREMENTS; ACOUSTIC TESTING; AMPLITUDES; ATTENUATION; COMPUTER CALCULATIONS; DATA ANALYSIS; ELECTRODES; FREQUENCY DEPENDENCE; GASES; LIQUIDS; MATERIALS TESTING; MODIFICATIONS; OPERATION; SOUND WAVES; WAVE PROPAGATION; FLUIDS; NONDESTRUCTIVE TESTING; TESTING; 420500* - Engineering- Materials Testing; 360000 - Materials; 400201 - Chemical & Physicochemical Properties; 440800 - Miscellaneous Instrumentation- (1990-)

Citation Formats

Martin, S.J., and Ricco, A.J. Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase. United States: N. p., 1993. Web.
Martin, S.J., & Ricco, A.J. Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase. United States.
Martin, S.J., and Ricco, A.J. Tue . "Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase". United States.
@article{osti_6292409,
title = {Multiple-frequency acoustic wave devices for chemical sensing and materials characterization in both gas and liquid phase},
author = {Martin, S.J. and Ricco, A.J.},
abstractNote = {A chemical or intrinsic physical property sensor is described comprising: (a) a substrate; (b) an interaction region of said substrate where the presence of a chemical or physical stimulus causes a detectable change in the velocity and/or an attenuation of an acoustic wave traversing said region; and (c) a plurality of paired input and output interdigitated electrodes patterned on the surface of said substrate where each of said paired electrodes has a distinct periodicity, where each of said paired electrodes is comprised of an input and an output electrode; (d) an input signal generation means for transmitting an input signal having a distinct frequency to a specified input interdigitated electrode of said plurality so that each input electrode receives a unique input signal, whereby said electrode responds to said input signal by generating an acoustic wave of a specified frequency, thus, said plurality responds by generating a plurality of acoustic waves of different frequencies; (e) an output signal receiving means for determining an acoustic wave velocity and an amplitude of said acoustic waves at several frequencies after said waves transverses said interaction region and comparing these values to an input acoustic wave velocity and an input acoustic wave amplitude to produce values for perturbations in acoustic wave velocities and for acoustic wave attenuation as a function of frequency, where said output receiving means is individually coupled to each of said output interdigitated electrode; (f) a computer means for analyzing a data stream comprising information from said output receiving means and from said input signal generation means to differentiate a specified response due to a perturbation from a subsequent specified response due to a subsequent perturbation to determine the chemical or intrinsic physical properties desired.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {8}
}