Method and a system for locating a vehicle on a track
US6498969B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2001 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Oct 25, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/183
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of locating a rail vehicle on a rail track includes the following steps:measuring the speed of the vehicle at different times using means providing an approximate value of the actual speed of the vehicle;measuring an inertial magnitude at different times using a single inertial sensor disposed on board the vehicle, the inertial magnitude being chosen to depend only on the speed of the vehicle and a geometrical characteristic specific to the track;calculating the abscissa of the vehicle on the track by means of a convergent algorithm based on a non-linear observer, from the known values of the measured approximate speed of the vehicle at different times preceding the time at which the vehicle is to be located, the measurements of the inertial magnitude and a database in which the geometrical characteristics specific to the track and its spatial derivative are stored for different curvilinear abscissae, the database being obtained by a learning process conducted beforehand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.