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Title: Passive tire pressure sensor and method

Abstract

A surface acoustic wave device includes a micro-machined pressure transducer for monitoring tire pressure. The device is configured having a micro-machined cavity that is sealed with a flexible conductive membrane. When an external tire pressure equivalent to the cavity pressure is detected, the membrane makes contact with ridges on the backside of the surface acoustic wave device. The ridges are electrically connected to conductive fingers of the device. When the detected pressure is correct, selected fingers on the device will be grounded producing patterned acoustic reflections to an impulse RF signal. When the external tire pressure is less than the cavity reference pressure, a reduced reflected signal to the receiver results. The sensor may further be constructed so as to identify itself by a unique reflected identification pulse series.

Inventors:
; ; ;
Issue Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175891
Patent Number(s):
7096736
Application Number:
10/633,774
Assignee:
The Goodyear Tire & Rubber Company (Akron, OH)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B60 - VEHICLES IN GENERAL B60C - VEHICLE TYRES
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Pfeifer, Kent Bryant, Williams, Robert Leslie, Waldschmidt, Robert Lee, and Morgan, Catherine Hook. Passive tire pressure sensor and method. United States: N. p., 2006. Web.
Pfeifer, Kent Bryant, Williams, Robert Leslie, Waldschmidt, Robert Lee, & Morgan, Catherine Hook. Passive tire pressure sensor and method. United States.
Pfeifer, Kent Bryant, Williams, Robert Leslie, Waldschmidt, Robert Lee, and Morgan, Catherine Hook. Tue . "Passive tire pressure sensor and method". United States. https://www.osti.gov/servlets/purl/1175891.
@article{osti_1175891,
title = {Passive tire pressure sensor and method},
author = {Pfeifer, Kent Bryant and Williams, Robert Leslie and Waldschmidt, Robert Lee and Morgan, Catherine Hook},
abstractNote = {A surface acoustic wave device includes a micro-machined pressure transducer for monitoring tire pressure. The device is configured having a micro-machined cavity that is sealed with a flexible conductive membrane. When an external tire pressure equivalent to the cavity pressure is detected, the membrane makes contact with ridges on the backside of the surface acoustic wave device. The ridges are electrically connected to conductive fingers of the device. When the detected pressure is correct, selected fingers on the device will be grounded producing patterned acoustic reflections to an impulse RF signal. When the external tire pressure is less than the cavity reference pressure, a reduced reflected signal to the receiver results. The sensor may further be constructed so as to identify itself by a unique reflected identification pulse series.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {8}
}

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Works referenced in this record:

Impedance loaded SAW sensors offer a wide range of measurement opportunities
journal, January 1999


Wireless passive SAW sensor systems for industrial and domestic applications
conference, January 1998