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Title: Monolithic piezoelectric sensor (MPS) for sensing chemical, biochemical and physical measurands

Abstract

A piezoelectric sensor and assembly for measuring chemical, biochemical and physical measurands is disclosed. The piezoelectric sensor comprises a piezoelectric material, preferably a crystal, a common metal layer attached to the top surface of the piezoelectric crystal, and a pair of independent resonators placed in close proximity on the piezoelectric crystal such that an efficacious portion of acoustic energy couples between the resonators. The first independent resonator serves as an input port through which an input signal is converted into mechanical energy within the sensor and the second independent resonator serves an output port through which a filtered replica of the input signal is detected as an electrical signal. Both a time delay and an attenuation at a given frequency between the input signal and the filtered replica may be measured as a sensor output. The sensor may be integrated into an assembly with a series feedback oscillator and a radio frequency amplifier to process the desired sensor output. In the preferred embodiment of the invention, a selective film is disposed upon the grounded metal layer of the sensor and the resonators are encapsulated to isolate them from the measuring environment. In an alternative embodiment of the invention, more thanmore » two resonators are used in order to increase the resolution of the sensor.« less

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE; US Department of the Army
OSTI Identifier:
20015724
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 7 Mar 2000
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; PIEZOELECTRICITY; MEASURING INSTRUMENTS; DESIGN; OPERATION; CHEMICAL PROPERTIES; PHYSICAL PROPERTIES; BIOCHEMISTRY

Citation Formats

Andle, J C, and Lec, R M. Monolithic piezoelectric sensor (MPS) for sensing chemical, biochemical and physical measurands. United States: N. p., 2000. Web.
Andle, J C, & Lec, R M. Monolithic piezoelectric sensor (MPS) for sensing chemical, biochemical and physical measurands. United States.
Andle, J C, and Lec, R M. Tue . "Monolithic piezoelectric sensor (MPS) for sensing chemical, biochemical and physical measurands". United States.
@article{osti_20015724,
title = {Monolithic piezoelectric sensor (MPS) for sensing chemical, biochemical and physical measurands},
author = {Andle, J C and Lec, R M},
abstractNote = {A piezoelectric sensor and assembly for measuring chemical, biochemical and physical measurands is disclosed. The piezoelectric sensor comprises a piezoelectric material, preferably a crystal, a common metal layer attached to the top surface of the piezoelectric crystal, and a pair of independent resonators placed in close proximity on the piezoelectric crystal such that an efficacious portion of acoustic energy couples between the resonators. The first independent resonator serves as an input port through which an input signal is converted into mechanical energy within the sensor and the second independent resonator serves an output port through which a filtered replica of the input signal is detected as an electrical signal. Both a time delay and an attenuation at a given frequency between the input signal and the filtered replica may be measured as a sensor output. The sensor may be integrated into an assembly with a series feedback oscillator and a radio frequency amplifier to process the desired sensor output. In the preferred embodiment of the invention, a selective film is disposed upon the grounded metal layer of the sensor and the resonators are encapsulated to isolate them from the measuring environment. In an alternative embodiment of the invention, more than two resonators are used in order to increase the resolution of the sensor.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {3}
}