Abstract: The invention relates to a method of graphical entry for the mapping of signal processing applications, intended for a machine comprising passive resources and active resources. It comprises at least the following steps: a) presenting in a first screen zone an “Archi View” portraying in the form of icons the available active or passive resources of the architecture of the machine in respect of a given level Li and the relationships between the resources, in a global model and/or in a local model, b) constructing the signal processing application in a second screen zone forming an “Appli View”, by borrowing one or more icons representative of the resources of the “Archi View”, the 2 steps a) and b) are implemented in a hierarchical manner by using ever finer successive views of the architecture of the machine.

Abstract: The invention relates to the methods for automatic placing of the tasks of an application in a signal-processing machine. It consists in determining a Table Distribution Operator (201), called TDO, by forming it with a chain of Elementary Operators (301), called EOs, which are separated by linking spaces (302). These elementary operators are 8 in number, 4 of which are direct and 4 of which are mirrors of the direct ones. It makes it possible to automate the hierarchization in the processing chain of a signal-processing machine operating with the method known by the name of “ARRAY-OL”.

Abstract: A device that allows control of the navigation of a towed underwater device, such as a linear acoustic antenna. The device is equipped with a pair of horizontal wings and a pair of vertical wings. These wings are kept horizontal and vertical by pendular movement of the device about the antenna on which the device is fixed. The action of the horizontal wings, which influence only immersion, and of the vertical wings, which influence only the lateral offset, are thus decoupled. The power consumption of the device is reduced, thus allowing the device to be powered by internal batteries and allowing the device to be mounted on existing antennas.

Abstract: A connection for an underwater acoustics system connecting elements of an antenna embedded in a leaktight first block of the system and an electro-optical transmitter embedded in a separate leaktight second block of the system. The antenna is electrically connected to a first part of a divisible transformer, which is also arranged in the leaktight first block. The electro-optical transmitter (e.g., vertical cavity surface emitting laser) is electrically connected to a second part of the divisible transformer, which is also arranged in the leaktight second block. The first part and the second part are anatomically separated, as are the first and second blocks within which they are contained, but have cores that can magnetically communicate with one another. By this configuration, the divisible transformer can communicate signals from the antenna to the electro-optical transmitter without compromising the leaktightness of the first or second blocks, thereby protecting the components.

Abstract: An underwater acoustic transducer configured to emit a low-frequency broadband acoustic signal. The underwater acoustic transducer includes a cap in the form of a cylinder closed on one side and open on the other side. A piezoelectric plate operating in flexion is fixed on the base of the cylinder outside the cylinder. The inside cavity defined by the cylinder is open freely toward the outside medium in which the acoustic waves are to be emitted. For identical dimensions, the underwater acoustic transducer makes it possible to decrease a central frequency of emission and to increase bandwidth.

Abstract: Towed low-noise linear acoustic antennas configured for seismic exploration. The jacket of this antenna is pierced with holes that allow seawater to enter the inside of the antenna. The hydrophones are isolated by enclosing them in polyurethane envelopes filled with oil or gel. Buoyancy is ensured by lightening the jacket with hollow inclusions formed from microspheres. Such a structure allows the output noise level of the hydrophones to be reduced by 15 dB.