Energy conservation in battery powered tag

Details Energy conservation in battery powered tag Energy conservation in battery powered tag

2005-05-17

2005-05-17

Zimmerman, Brian (Department: 2635)

Communications: electrical

Selective

Interrogation response

C340S442000, C340S447000, C324S423000, C324S434000, C073S146000, C073S146500

Reexamination Certificate

active

06894600

ABSTRACT:
Method and apparatus for conserving energy in a battery powered tag which comprises a battery, one or more sensors, and a transmitter. The tag may be used in a pneumatic tire monitoring system which senses and transmits tire pressure and temperature readings. The method fundamentally comprises: hibernating between transmissions by the transmitter; and reading at least one of the sensors after each of a plurality of sleep periods while hibernating. A hibernation period may be ended if one of the sensor readings, preferably tire temperature, is very low, and at least one of a plurality of qualification criteria is met.

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