Method and device for filtering information emitted by a pressure sensor mounted on a wheel of a vehicle
US7209855B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2005 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Sep 1, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60C23/0408
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for filtering information emitted, on the basis of pressure measurements taken by a pressure sensor mounted on a wheel of a vehicle equipped with a tire, to a central unit mounted on the vehicle. According to this method, a value representative of the pressure of the air in the tire is measured periodically, with a period θ, and from this any possible variations ΔP in pressure between the values of the pressures successively measured are deduced; in parallel, with the same period θ, a value representative of the temperature of the air in the tire is measured. In addition, when there is a variation ΔP in pressure between two measured pressure values, that is greater in terms of absolute value than a predetermined threshold Sp, the variation ΔT between the two temperature values measured at the same instants as the measured pressures is calculated. The emission of a signal representative of a variation in pressure to the central unit is commanded only if the comparative change in the pressure and in the measured temperature might be representative of a variation of the amount of air in the tire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.