System for monitoring pressure and temperature of pneumatic tire

Details System for monitoring pressure and temperature of pneumatic tire System for monitoring pressure and temperature of pneumatic tire

1992-02-05

1993-12-28

Peng, John K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340444, 340449, 340557, 340442, 731465, 73705, 116 34R, B60C 2300

Patent

active

052743551

ABSTRACT:
A tire pressure and temperature monitoring system for measuring tire inflation pressure and anomalous temperature of rotating tires in a moving vehicle by means of optoelectronic devices located in the stationary structure of the vehicle and an elastic diaphragm that rotates with the wheel and tire. The combined use of optoelectronic components and elastic diaphragms, provides a marked improvement in performance, reliability and cost over previously disclosed magnetic or radio frequency pressure measurement systems. The optoelectronic detector elements are also used to identify those tires whose side wall temperature is significantly higher than the side wall temperature of the other tires. In addition, the system can also be used as a measurement of individual wheel rotational speed and related wheel motion. Alternatively, fiber optic cables can be used to transmit light from a single light source to lenses mounted adjacent each tire and to transmit the reflected energy to remotely located optoelectronic devices.

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