Method for measuring the speed of a rail vehicle and installation therefor
US7938370B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2000 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Apr 20, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L3/121
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In order to measure a speed of a vehicle having an antenna and travelling on a track formed by two rails, first and second discontinuities are detected. The first discontinuity is detected in a current or voltage of a signal generated by an antenna when the vehicle passes a first tuning block of an electric joint. The second discontinuity is detected in a current or voltage of a signal generated by the antenna when the vehicle passes a second tuning block of the electric joint. The detected discontinuities are used to measure the speed of the vehicle travelling on a track divided in track sections separated by electric joints. Each electric joint includes two tuning blocks and a predetermined length of a track section, wherein each of the tuning blocks allows power coupling between adjacent track sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.