Abstract:
The present invention relates to a method of synchronization between communication networks exchanging information by frame of informations, each communication network having clock and the number of clock pulses is monitored by a counter the synchronization is made by reading information representing the counted clock pulses of the clock of the first network at the appearance of a reference event, inserting at least said information or calculated information on the basis of said information into the frame of information as the synchronization information, transferring said frame of information from the first to the second network, reading information representing the number of counted clock pulse of the clock of the second network at the appearance of reference event, reading synchronization information inserted in received frame of information from the first network, calculating a difference between information and synchronizing the second network.
Abstract:
The present invention relates to a method of synchronization between communication networks exchanging information by frame of informations, each communication network having clock and the number of clock pulses is monitored by a counter the synchronization is made by reading information representing the counted clock pulses of the clock of the first network at the appearance of a reference event, inserting at least said information or calculated information on the basis of said information into the frame of information as the synchronization information, transferring said frame of information from the first to the second network, reading information representing the number of counted clock pulse of the clock of the second network at the appearance of reference event, reading synchronization information inserted in received frame of information from the first network, calculating a difference between information and synchronizing the second network.
Abstract:
An information packet transmission device for a communication system has a transmission part and a reception part, at least one of the transmission or reception parts having a turbocoder, and an external interleaver upstream of the turbocoder. The turbocoder preferentially has an interleaver, and a deinterleaver of the “x to xe” type. The external interleavers are of the row column or column row type.
Abstract:
A range finder includes a device for transmitting a laser beam and a device for receiving the laser echoes backscattered by a target, comprising a frontal optical system focusing the echoes on a detection zone which comprises at least one elementary detection zone associated with an individual detector with a large bandwidth, referred to as a temporal detector, and means for transporting the detection zone to the individual detector. An elementary zone is furthermore associated with a low-noise individual detector, referred to as a spatial detector, and the receive device furthermore comprises, connected to the transporting means, a switch suitable for associating said elementary detection zone with the temporal detector and with the spatial detector, alternately or in a static manner.
Abstract:
A laser device suitable for emitting pulses with a variable period and with stabilized energy includes: a resonant cavity including an amplifying medium presenting a stabilized gain G and suitable for emitting laser pulses at a wavelength λ, and a Q-switch, and a source of continuous pumping of the amplifying medium. It furthermore includes an injector positioned outside the resonant cavity, suitable for emitting a beam of wavelength λ into the amplifying material for the duration of the pumping, and which includes means for adjusting the power of this beam in order to reduce the gain of the amplifying medium to G/k, where k is a real number greater than 1.
Abstract:
The present invention relates to a range-finder comprising a laser pulse emission device and a device for detecting the pulses reflected by a distant object.The emission device is capable of emitting pulses of N distinct wavelengths, N being an integer greater than 1, with, for each wavelength, a pulse repetition frequency less than a predetermined threshold frequency.Thus, no given wavelength emission will be faced with the problem of distance ambiguity.
Abstract:
A digital communication converter includes: a connection unit with a communication unit from which it receives or to which it delivers data frames; and a unit for sending/receiving over a transmission medium in order to transmit, by means of the medium, data frames which are delivered to it and/or to deliver information frames which it receives by means of the medium. A transmission control unit delivers, respectively to the connection unit and the sending/receiving unit, frames which have been delivered to it respectively by the sending/receiving unit and by means of the connection unit. A memory stores an address relating to the communication unit, this address being used for operating a protocol for controlling access to the transmission medium.
Abstract:
An optical pumping structure for lasers includes: an active medium in the form of a cylindrical rod with a circular cross-section, said rod being inserted at its ends into two rings made of a thermally conductive material; at least three stacks of pumping diode strips arranged in the form of a star around the rod; and a support temperature-regulated by a Peltier-effect module. The rings are in contact with the support, and a stack of diodes, called bottom stack, being situated between the rod and the support, and the structure comprises, for each other stack, a thermal conduction block forming a support for said stack, these blocks being mounted on the cooled support and not being in contact with one another or with the rings.
Abstract:
A laser device suitable for emitting pulses with a variable period and with stabilized energy includes: a resonant cavity including an amplifying medium presenting a stabilized gain G and suitable for emitting laser pulses at a wavelength λ, and a Q-switch, and a source of continuous pumping of the amplifying medium. It furthermore includes an injector positioned outside the resonant cavity, suitable for emitting a beam of wavelength λ into the amplifying material for the duration of the pumping, and which includes means for adjusting the power of this beam in order to reduce the gain of the amplifying medium to G/k, where k is a real number greater than 1.
Abstract:
The invention relates to a method for treating fumes generated during the production, conversion and/or handling of oil-based products and a device for carrying out said method. The invention further relates to the use of the method or device in which the trapping device comprises at least one fluidized bed of granular material in the preparation of a granular material for use in production of road materials.