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US 5,684,489 AGranted
Position-finding apparatus for locating a vehicle travelling along means for propagating electromagnetic waves
AssigneeGEC Alsthom Transport SA
InventorDenis Fournier
Life of this patent
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Abstract
The present invention relates to apparatus for locating a vehicle V travelling along propagation means P. An object of the apparatus of the invention is to determine the position of the vehicle V, i.e. to determine the distance D between the vehicle V and a given point along the propagation means P. Application in particular to rail transport.
Claims11
A position-finding apparatus for locating a vehicle travelling along propagation means for propagating electromagnetic waves, said position-finding apparatus including:
- transmit means for transmitting transmitted electromagnetic waves;
- reflection means for reflecting said transmitted electromagnetic waves;
- receive means for receiving the reflected electromagnetic waves reflected by said reflection means;
- comparator means for comparing said transmitted electromagnetic wave with said reflected electromagnetic waves;
- and
- processing means for processing the result obtained by said comparator means, so as to make it possible to determine the distance between said vehicle and said reflection means;
- said propagation means for propagating said transmitted electromagnetic wave and said reflected electromagnetic waves being radiating propagation means.
4 more elements
Dependencies are inferred from the claim text.