Multiple-mode acoustic wave sensor
AssigneeHoneywell International Inc.
InventorsJames Liu, Michael Rhodes, Aziz Rahman
Life of this patent
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Abstract
A multiple-mode acoustic wave sensor apparatus includes an acoustic wave device comprising a piezoelectric substrate and at least one electrode on the substrate. When such sensor is used in a wireless configuration, a plurality of antennas can be configured on the substrate in association with the acoustic wave device, wherein each antenna among the plurality of antennas is responsive to varying interrogation signals transmitted wirelessly to the plurality of antennas in order to excite multiple frequency modes via at least one interdigital transducer on the substrate and thereby passively detect multiple and varying parameters of a sensed material utilizing the acoustic wave device.
Claims21
A multiple-mode acoustic wave sensor apparatus, comprising:
- a wireless interrogation unit comprising a transmitter and a receiver;
- an acoustic wave device comprising a piezoelectric substrate and at least one electrode on said piezoelectric substrate;
- and
- a plurality of antennas configured on said piezoelectric substrate in association with said acoustic wave device, wherein each antenna among said plurality of antennas is responsive to varying interrogation signals transmitted wirelessly to said plurality of antennas from said wireless interrogation unit in order to excite multiple frequency modes via at least one interdigital transducer on said piezoelectric substrate and thereby passively detect multiple and varying parameters of a sensed material utilizing said acoustic wave device.
A multiple-mode acoustic wave sensor apparatus, comprising:
- an acoustic wave device comprising a piezoelectric substrate and at least one electrode on said piezoelectric substrate;
- and
- a plurality of oscillators associated with said acoustic wave sensor, wherein each oscillator among said plurality of oscillators is responsive at least one signal in order to excite multiple frequency modes via said acoustic wave device, such that each of said oscillators transmits an excitation signal through a wired connections to said acoustic wave device and wherein said acoustic wave device is configured to suppress at least some predetermined frequency modes among said multiple frequency modes while permitting the excitation of other frequency modes thereof via said acoustic wave sensor device.
A multiple-mode acoustic wave sensor method, comprising the steps of:
- providing a wireless interrogation unit comprising a transmitter and a receiver;
- forming an acoustic wave device comprising a piezoelectric substrate and at least one interdigital transducer formed as an electrode on said piezoelectric substrate;
- and
- configuring a plurality of antennas on said piezoelectric substrate in association with said acoustic wave device, wherein each antenna among said plurality of antennas is responsive to varying interrogation signals transmitted wirelessly to said plurality of antennas from said wireless interrogation unit in order to excite multiple frequency modes via at least one interdigital transducer on said piezoelectric substrate and thereby passively detect multiple and varying parameters of a sensed material utilizing said acoustic wave device.
Dependencies are inferred from the claim text.