External mount tire pressure sensor system
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United States of America Patent
Stats
-
Nov 1, 2005
Grant Date -
Apr 7, 2005
app pub date -
Jan 21, 2003
filing date -
Jan 21, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An external mount tire pressure sensor system with a stretch sensor having a variable resistance longitudinal displacement characteristic. The stretch sensor is coupled to a processor which samples the resistance of the stretch sensor periodically. The sensor body is attached to the external side wall of a pneumatic tire so that the body is displaced by the tire side wall and the resistance is a function of internal tire pressure. When the processor determines that the pressure is below a threshold value, an r.f. generator is activated by the processor to generate a low tire pressure signal. This signal is converted by a receiver to a warning for the driver.
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