Apparatus and method for measuring a tire pressure from the tire footprint
US8833152B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 2011 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Sep 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M17/027
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for measuring the pressure of a tire on a moving vehicle, comprising measuring device (14, 18, 24) which is provided on or inside a floor or ground so as to interact with the tire and which generates an electronically analyzable measurement signal in reaction to the tire driving over the measuring device, and analysis unit (22, 40) which output a tire pressure signal corresponding to the tire pressure in reaction to the measurement signal. The measuring device includes an optical unit (18) for acquiring a tire width as the width of a tire footprint forming when the tire drives over the floor/ground. The analysis unit is designed to determine a footprint length from a series of tire width data generated by the optical unit and/or from a pattern of a pressure measurement signal generated by the measuring device and to determine the tire pressure from a footprint area calculated as a function of the length and width of the footprint and from a force applied to the footprint area by the tire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.