Communication device for obtaining train position, has marker provided with receiver receiving signal from antenna of reader for providing energy to transmitter that sends signal, at specific frequency, received by another antenna of reader

摘要

The device (D) has an electromagnetic field reader (L) comprising a transmitter provided with an antenna (5) that is turned around a rectilinear ferrite bar, and a receiver with another antenna (6) that is turned around a ferrite bar placed in a box (1), where the box is filled with a polyurethane material. A marker (B) has a receiver receiving a signal from the antenna (5) of the reader for providing energy to a transmitter hat sends a signal, at a frequency comprised between 4 and 12 megahertz, received by the antenna (6) of the reader.