Robust radio frequency signals
US7924148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2008 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Feb 8, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/0464
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A tire pressure monitoring system includes a receiver for processing signals and alerting an operator of the vehicle should conditions within any of the tires fall outside a desired range. The transmitters within the tires emit shorter transmission signals during operation by eliminating transmission of the identification code. The receiver stores the identifier for each transmitter for comparison to subsequent transmissions. Subsequent transmissions do not include the identifier. The receiver combines the saved identifier with the value provided in the check portion of the incoming transmission. If the combination of the saved identifier with the value provided in the check portion meets a defined criteria, than the signal is recognized as originating from one of the transmitters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.