Passive wireless piezoelectric smart tire sensor with reduced size
AssigneeHoneywell International Inc.
InventorJames Z. Liu
Life of this patent
Estimating the term…
Abstract
A surface wave device can be configured to include an interdigital transducer and an acoustic coating formed upon a piezoelectric substrate, wherein the interdigital transducer is selected to introduce negligible electrical coupling to surface waves thereof. Additionally, an antenna can be integrated with the surface wave device, wherein the antenna receives one or mores signals, which excite the acoustic wave device to produce multiple modes frequency outputs in which temperature and pressure effect changes are separated from one another for analysis thereof.
Claims20
A sensor system, comprising:
- a surface wave device comprising an interdigital transducer and an acoustic coating formed upon a piezoelectric substrate, wherein said interdigital transducer is selected to introduce negligible electrical coupling to surface waves thereof;
- and
- an antenna integrated with said surface wave device, wherein said antenna receives at least one signal, which excites said acoustic coating to produce multiple modes frequency outputs in which temperature and pressure effect changes are separated from one another for analysis thereof.
A sensor system, comprising:
- a surface wave device comprising an interdigital transducer and an acoustic coating formed upon a piezoelectric substrate, wherein said interdigital transducer is selected to introduce negligible electrical coupling to surface waves thereof;
- an antenna integrated with said surface wave device, wherein said antenna receives at least one signal, which excites said acoustic coating to produce multiple modes frequency outputs in which temperature and pressure effect changes are separated from one another for analysis thereof;
- and
- a transmitter and receiver unit for transmitting said at least one signal to said antenna integrated with surface wave device.
A sensor method, comprising:
- configuring a surface wave device to comprise an interdigital transducer and an acoustic coating formed upon a piezoelectric substrate, wherein said interdigital transducer is selected to introduce negligible electrical coupling to surface waves thereof;
- and
- integrating an antenna integrated said surface wave device, wherein said antenna receives at least one signal, which excites said acoustic coating to produce multiple modes frequency outputs in which temperature and pressure effect changes are separated from one another for analysis thereof.
Dependencies are inferred from the claim text.