Guided vehicle control process and apparatus
US4713663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 1985 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Nov 27, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61L3/125
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The apparatus according to the invention relates to a guided vehicle control process and apparatus which comprises passive beacons, as well as radars permitting the detection thereof. The presence or absence of a beacon permits the automatic control of a train, e.g. with a view to automating the driving thereof. The apparatus according to the invention uses retrodirectional beacons and/or beacons inducing a polarization rotation of the radiation received. The use of retrodirectional beacons induces a change of frequency by Doppler effect of the reflected radiation. The change of the Doppler frequency and/or the polarization rotation of the radiation improves the signal-clutter ratio and/or the separation of the transmission and reception channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.