Passive wireless piezoelectric smart tire sensor with reduced size

a wireless piezoelectric and smart tire technology, applied in the field of sensing devices and techniques, can solve the problems of losing the memory of previously learned odors, and achieve the effect of negligible electrical coupling
US20050225200A1Inactive Publication Date: 2005-10-13HONEYWELL INT INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
HONEYWELL INT INC
Publication Date
2005-10-13
Estimated Expiration
Not applicable · inactive patent

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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.
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Description

TECHNICAL FIELD

[0001] Embodiments are generally related to sensing devices and techniques. Embodiments are also related to interdigital surface wave sensor devices, such as, for example, surface acoustic wave (SAW) and bulk acoustic wave (BAW) devices and sensors. Embodiments also relate to tire pressure and temperature sensors utilized for monitoring vehicle tires. BACKGROUND OF THE INVENTION

[0002] Acoustic wave sensors are utilized in a number of sensing applications, such as, for example, temperature, pressure and / or gas sensing devices and systems. Examples of surface wave sensors include devices such as acoustic wave sensors, which can be utilized to detect the presence of substances, such as chemicals. An acoustic wave (e.g., SAW / BAW) device acting as a sensor can provide a highly sensitive detection mechanism due to the high sensitivity to surface loading and the low noise, which results from their intrinsic high Q factor.

[0003] Surface acoustic wave devices are typically ...

Claims

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