Trw Limited

Trw Automotive U.S. LLC

Kenneth L Brown

George W McIver

Barry Dunbridge

Kiran Ramanlal Magiawala

Kelley D Chilcott

Thomas J Kolze

Eric L Upton

Martin P Smith

A tire and suspension monitoring and warning system consisting of a set of multi-function sensors that monitor and warn of a failure mode. The system monitors and warns for tire imbalance, tire tread wear, and shock absorbers for a tire attached to a vehicle. The monitoring and warning system includes one axial, radial, and lateral acceleration measurement of the wheel to provide acceleration signal sample power. For tire imbalance, signal sample power in the second harmonic of the tire rotational frequency is compared to that of the first harmonic. For tire tread wear, average signal sample power within a second frequency range is compared to a previously stored baseline value. For shock absorber performance, a sum of all frequency components in a second predetermined frequency range is compared to a baseline value.

Tire and suspension warning and monitoring system

A method of acquiring a communications signal is provided. The method includes the steps of storing a forward chirp sync segment ( ) of an auto-correlating forward chirp sync ( ) and storing a reverse chirp sync segment ( ) of a symmetric auto-correlating reverse chirp sync ( ). A header comprising of either a forward chirp sync FCS ( ) or a reverse chirp sync RCS ( ), a predetermined number of data blocks comprising a data frame ( ), and the symmetric auto-correlating trailer is received. The header, the data blocks, and the symmetric trailer are susceptible to frequency error. The method correlates the FCS segment ( ) with the auto-correlating FCS ( ) to provide a FCS correlation signal ( ) and correlates the RCS segment ( ) with the auto-correlating RCS ( ) to provide a RCS correlation signal ( ). The method determines the frequency error, symbol timing, and frame timing based upon the FCS correlation signal ( ) and the RCS correlation signal ( ).

Symmetric chirp communications acquisition method and apparatus

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Manhattan Beach, CA, United States of America

Kenneth L Brown