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US 7,453,350 B2Granted
Tire pressure monitoring system transmission protocol
AssigneeContinental Automotive Systems US, Inc.
InventorsPatricia Kachouh, Tejas B. Desai, Kurt VanDrus
Life of this patent
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Abstract
A system for monitoring conditions within a tire includes a sensor assemblies (14). The sensor assemblies (14) emit a transmission (26) containing information indicative of conditions within a tire to a receiver (16). The transmission (26) from the sensor assemblies (14) includes an amplitude shift key wake up portion and various data packet portions. The data packet portions are separated by a variable interval to prevent collisions of transmissions at the receiver.
Claims6
A method of transmitting information indicative of conditions within a tire comprising the steps of:
- a. transmitting a signal including an amplitude shift keyed transmission preamble to a receiver;
- b. transmitting a frequency shift keyed (FSK) identification code from a first transmitter;
- c. transmitting a fsk signal indicative of pressure within the tire from the first transmitter;
- d. transmitting a fsk signal indicative of temperature within the tire from the first transmitter,
- e. varying a time interval between portions of said identification code, said signal indicative of pressure within the tire, and said signal indicative of temperature within the tire;
- and
- f. receiving one of a frequency shift keyed (FSK) identification code, an FSK signal indicative of pressure within a tire, and an FSK signal indicative of a temperature within a tire from a second transmitter within the time interval between portions of any of the FSK signals from the first transmitter.
4 more elements
Dependencies are inferred from the claim text.