Position determination method and system
US10780905B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 2018 |
| Grant date | Sep 22, 2020 |
| Priority date | — |
| Expiry date | Jan 29, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L25/06
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of determining the geographical position of a rail vehicle travelling on a defined route that has a number of known stopping locations separated by known distances. The method comprises steps of: recording a linear speed signal of the vehicle; processing the linear speed signal to identify a plurality of preceding stationary periods when linear speed equals zero, including a last stationary period, and to calculate the distance traveled between the plurality of preceding stationary periods; comparing the calculated distances with the known distances between stopping locations, to match the last identified stationary period to a corresponding one of the known stopping locations and identify the direction of travel of the rail vehicle; and determining the geographical position of the rail vehicle by processing a portion of the speed signal obtained since the last identified stationary period, to calculate the distance traveled from the corresponding stopping location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.