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Piezoelectric Powered (Batteryless) Radio Frequency Identification Tag for Tires

IP.com Disclosure Number: IPCOM000118057D
Original Publication Date: 1996-Aug-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Cato, RT: AUTHOR

Abstract

This article describes a means for using a piezoelectric transducer to power a Radio Frequency Identification (RFID) tag and some tire status sensors. It would then be possible to track a tire's temperature history, pressure history, and tire Identification (ID) number. Other parameters could also be tracked: the tire's mileage, the history of how heavily the tire had been loaded, and how fast the tire has been driven during its life. The RFID tag would store the tire data and transmit it to a reader when queried.

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Piezoelectric Powered (Batteryless) Radio Frequency Identification
Tag for Tires

      This article describes a means for using a piezoelectric
transducer to power a Radio Frequency Identification (RFID) tag and
some tire status sensors.  It would then be possible to track a
tire's temperature history, pressure history, and tire Identification
(ID) number.  Other parameters could also be tracked:  the tire's
mileage, the history of how heavily the tire had been loaded, and how
fast the tire has been driven during its life.  The RFID tag would
store the tire data and transmit it to a reader when queried.

      Combine IBM's RFID tag technology with one or more tire
parameter transducers.  Connect Piezoelectric strips to the tag.  The
strips will be oriented radially on the tire's side wall.  As the
side wall flexes when the tire rotates, the piezoelectric material
will generate electric power and information for the tag.

      The piezoelectric strips' output waveform's frequency will be
the tire's rate of rotation.  The amount of flexing of the side wall
will determine the waveform's amplitude and is dependent on the
tire's air pressure and the load the tire is carrying.

      In addition to the data collected and stored by the tag (ID
number, air pressure, and temperature), the frequency and amplitude
of waveform from the piezoelectric material will yield information on
how fast the tire has been driven, the miles the tire has traveled,
and the load it has carried.

      A tire's sidewall flexes outward on the lower part of the tire
that is in contact with the road.  There is less outward flexing of
the sidewall when it is away from the road.  Consequently, a tire's
sidewall flexes in and out as it rotates.  This flexing would bend a
piezoelectric strip...