Abstract: This system (210) comprises an antenna (20) comprising a first loop (22) and a second loop (24) having different radiation patterns, the first and second loops being designed to generate first and second currents (I1, I2) when the antenna passes over a beacon situated on the line and an electronic processing subsystem designed to generate a location signal from said first and second currents. It is characterized by said subsystem being a first subsystem (230) for generating a first location signal (SL1), the system comprises a second subsystem (240) for generating a second location signal (SL2) from said first and second currents, and by said subsystem comprising an arbitration means (250) designed to generate a safety location signal (SLS) according to said first and second location signals.

Abstract: The invention relates to a method for controlling the operation of a positioning system (10) of a train, the system (10) including: a toothed tone wheel (12), three sensors (18, 20, 22) for detecting the presence of a tooth, arranged spatially so that six possible and different positions of the wheel (12) may be represented by six possible logic states of the three sensors (18, 20, 22), the six states being different, the method including a step for: detecting states corresponding to the signals delivered by the three sensors (18, 20, 22), comparing the detected states with the values of the six logic states, determining the operating state of the system (10) according to the comparison.

Abstract: This system for coupling between a wire communication link exhibits a characteristic line impedance suitable for transporting a single signal simultaneously comprising an electrical power supply and data, and a control unit comprising an electrical power supply terminal and a data terminal, said system exhibiting an input impedance. This system comprises means for adapting the input impedance so as to match the characteristic line impedance.

Abstract: The invention relates to a method for controlling the operation of a positioning system (10) of a train, the system (10) including: a toothed tone wheel (12), three sensors (18, 20, 22) for detecting the presence of a tooth, arranged spatially so that six possible and different positions of the wheel (12) may be represented by six possible logic states of the three sensors (18, 20, 22), the six states being different, the method including a step for: detecting states corresponding to the signals delivered by the three sensors (18, 20, 22), comparing the detected states with the values of the six logic states, determining the operating state of the system (10) according to the comparison.

Abstract: This system (210) comprises an antenna (20) comprising a first loop (22) and a second loop (24) having different radiation patterns, the first and second loops being designed to generate first and second currents (I1, I2) when the antenna passes over a beacon situated on the line and an electronic processing subsystem designed to generate a location signal from said first and second currents. It is characterized by said subsystem being a first subsystem (230) for generating a first location signal (SL1), the system comprises a second subsystem (240) for generating a second location signal (SL2) from said first and second currents, and by said subsystem comprising an arbitration means (250) designed to generate a safety location signal (SLS) according to said first and second location signals.

Abstract: This system (8) for coupling between a wire communication link (16) exhibits a characteristic line impedance suitable for transporting a single signal simultaneously comprising an electrical power supply and data, and a control unit (6) comprising an electrical power supply terminal (12) and a data terminal (14), said system (8) exhibiting an input impedance. This system (8) comprises means (34, 36, 42) for adapting the input impedance so as so match the characteristic line impedance.