Abstract: A system for verifying the integrity of a train having a predetermined length is provided. The system includes a device for communicating and synchronizing with a detector of a circuit. The detector detects the presence/absence of a train. The device also includes an odometer providing an odometric reference at the start of occupation of the circuit and when the circuit is left by the train, a first processor calculating the distance traveled by the train on the basis of the difference between the two odometric references, a second processor calculating a minimum estimate of the length of the train that is equal to the calculated distance traveled less the algebraic length of the detection circuit and an information mechanism indicating that the train is integral when the calculated length of the train is greater than the predetermined length of the train less the length of a wagon. A method and a computer program product are also provided.

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.

Abstract: A system for verifying the integrity of a train having a predetermined length is provided. The system includes a device for communicating and synchronizing with a detector of a circuit. The detector detects the presence/absence of a train. The device also includes an odometer providing an odometric reference at the start of occupation of the circuit and when the circuit is left by the train, a first processor calculating the distance traveled by the train on the basis of the difference between the two odometric references, a second processor calculating a minimum estimate of the length of the train that is equal to the calculated distance traveled less the algebraic length of the detection circuit and an information mechanism indicating that the train is integral when the calculated length of the train is greater than the predetermined length of the train less the length of a wagon. A method and a computer program product are also provided.

Abstract: A system for verifying the integrity of a train having a predetermined length including: a device for communicating and synchronising with a detector of a circuit, detecting the presence/absence of a train, an odometer providing an odometric reference at the start of occupation of the circuit and when the circuit is left by the train, a first processor calculating the distance travelled by the train on the basis of the difference between the two odometric references, a second processor calculating a minimum estimate of the length of the train that is equal to the calculated distance travelled less the algebraic length of the detection circuit, information mechanism indicating that the train is integral when the calculated length of the train is greater than the predetermined length of the train less the length of a wagon.

Abstract: A system for establishing the speed, in a safe manner, of an object (1) which is travelling along a known trajectory, including a device (3, 7) for locating the object and direction of its movement, a receiver (6) for receiving a signal from a plurality of satellites (4, 5) and processing units. For each satellite, a processing unit (8) includes a frequency meter for measuring the frequency shift of the signal received relative to the frequency of the signal transmitted, a device for establishing the vectorial difference of the speeds of the object and the satellite by calculating the Doppler effect and, a calculator of the speed in the movement direction of the object. The measurements of the frequency shift are repeated independently on signals from a plurality of satellites, and the results obtained are combined in order to obtain a speed with the desired level of safety.

Abstract: A system for verifying the integrity of a train having a predetermined length including: a device for communicating and synchronising with a detector of a circuit, detecting the presence/absence of a train, an odometer providing an odometric reference at the start of occupation of the circuit and when the circuit is left by the train, a first processor calculating the distance travelled by the train on the basis of the difference between the two odometric references, a second processor calculating a minimum estimate of the length of the train that is equal to the calculated distance travelled less the algebraic length of the detection circuit, information mechanism indicating that the train is integral when the calculated length of the train is greater than the predetermined length of the train less the length of a wagon.

Abstract: The invention relates to a system for establishing the speed, in a reliable manner, of an object (1) which is travelling along a known trajectory, comprising: means (3, 7) for locating the object and direction of its movement, means (6) for receiving a signal from a satellite (4, 5) and calculation means (8) comprising: means for measuring the frequency shift of the signal received relative to the frequency of the signal transmitted, means for establishing the vectorial difference of the speeds of the object and the satellite by calculating the Doppler effect and, means for calculating the speed in the movement direction of the object, and, the measurements of the frequency shift being repeated independently on signals from a plurality of satellites, means for combining the results obtained in order to obtain a speed with the desired level of reliability.

Abstract: A device for determining the location or the position of an object moving along a known course includes equipment associated with the object. The equipment includes at least one central computer, at least one receiver/decoder of signals originating from one or more satellites, a radio interface and a database having a mapping of the course of the object. The device includes further central equipment including a central computer, one or more radio interfaces, a bus system, a database including the mapping of the course, an application for managing modifications of the mapping and at least one console, and moving-object/central-equipment and man/moving-object interface elements.

Abstract: A device for determining the location or the position of an object moving along a known course includes equipment associated with the object. The equipment includes at least one central computer, at least one receiver/decoder of signals originating from one or more satellites, a radio interface and a database having a mapping of the course of the object. The device includes further central equipment including a central computer, one or more radio interfaces, a bus system, a database including the mapping of the course, an application for managing modifications of the mapping and at least one console, and moving-object/central-equipment and man/moving-object interface elements.

Abstract: The present invention relates to an AC input cell for data acquisition circuits, comprising at least one circuit for detecting a voltage greater than the reference for the positive half-cycle at the input voltage, and a device for detecting a voltage greater than the reference for the negative half-cycle of the input voltage. Each detection circuit comprises a Zener diode, an optocoupler including an emission LED, a diode and a resistor arranged in series. Each detection circuit is arranged on a branch, and the two branches are in parallel with the devices arranged in opposite directions so that the two circuits conduct on alternate half cycles of the input AC signal.

Abstract: A continuous input cell for data acquisition circuits, particularly in railway applications. The cell consists of at least two parallel lines of identical elements, and each line includes at least one Zener diode (DZ1 or DZ2), a switch (SW1 or SW2) preferably consisting of an optocoupler (U1 or U2), and an optocoupler (U3 or U4) including an LED.