Abstract: A device for receiving acoustic waves, includes an acoustic antenna able to function as a condenser microphone distributed along a line of the acoustic antenna comprising a conductor and a dielectric, the line being a transmission line or being configured to function as a transmission line when the dielectric makes direct physical contact with another conductor, an exciter configured to apply, in a receiving step, an input voltage to a first longitudinal end of the line so as to generate an input electromagnetic wave that moves toward a second longitudinal end of the line and so as to generate an output electromagnetic wave that moves in the opposite direction to the input electromagnetic wave, the input voltage simultaneously comprising a set of sinusoidal voltages comprising a fundamental sinusoidal voltage and a set of harmonics of the fundamental sinusoidal voltage, the frequency of the fundamental sinusoidal voltage being defined so that stationary waves are established in the line such that the output e

Abstract: A method controlling a thruster of a marine vehicle is provided. The marine vehicle is at least partially submerged in a liquid and includes a body and a thruster including two propellers. Each propeller includes blades intended to tum about a rotation axis of said propeller. The method includes a step of low-speed maneuver controlling, during which the thruster is controlled in such a way that each propeller generates a flow directed toward the flow generated by the other propeller and reaching the flow generated by the other propeller.

Abstract: A method for controlling a thruster of a marine vehicle includes a body and a thruster mounted on the body of the vehicle, the vehicle being at least partially immersed in a liquid and moving with respect to the liquid along an axis of displacement in a direction of displacement and rotating about at least one axis of rotation perpendicular to the axis of displacement with a rotational speed, the thruster including an upstream propeller and a downstream propeller along the axis of displacement in the direction of displacement.

Abstract: A method is provided for piloting a set of robots comprising, for each robot, a step of generation of a guidance instruction for the robot at a given instant, the guidance instructions for the set of robots being determined from a single set of constraints comprising a pack constraint comprising at least one set of at least one first relative positioning constraint between a robot and its neighbors of the first order in the pack for the set of robots to form a pack exhibiting a predetermined shape, the method further comprising a step of piloting of the robots so as to observe the guidance instruction.

Abstract: A method controlling a thruster of a marine vehicle at least partially submerged in a liquid includes a body and a thruster including two propellers, each propeller including blades intended to turn about a rotation axis of said propeller, the method including a step of low-speed maneuver controlling, during which the thruster is controlled in such a way that each propeller generates a flow directed toward the flow generated by the other propeller and reaching the flow generated by the other propeller.

Abstract: A method for controlling a thruster of a marine vehicle includes a body and a thruster mounted on the body of the vehicle, the vehicle being at least partially immersed in a liquid and moving with respect to the liquid along an axis of displacement in a direction of displacement and rotating about at least one axis of rotation perpendicular to the axis of displacement with a rotational speed, the thruster including an upstream propeller and a downstream propeller along the axis of displacement in the direction of displacement.

Abstract: An underwater vehicle designed for navigation at the surface or underwater, having a hull, and at least one normal-force generator of force normal to a longitudinal axis of the underwater vehicle, borne by the hull, wherein a forward part of the hull is asymmetric with respect to the longitudinal axis so as to generate lift as the underwater vehicle moves and wherein the lift is in the opposite direction to the resultant of the forces of the normal-force generator or generators is provided.

Abstract: A method is provided for piloting a set of robots comprising, for each robot, a step of generation of a guidance instruction for the robot at a given instant, the guidance instructions for the set of robots being determined from a single set of constraints comprising a pack constraint comprising at least one set of at least one first relative positioning constraint between a robot and its neighbors of the first order in the pack for the set of robots to form a pack exhibiting a predetermined shape, the method further comprising a step of piloting of the robots so as to observe the guidance instruction.

Abstract: The invention relates to a mapping method implementing a radar used in passive mode. It is possible to use such a radar for locating an object likely to reflect an electromagnetic wave transmitted by a transmitter the position of which is known. Movable objects (3) capable of reflecting rays received from transmitters of opportunity (2) are used. The method comprises the following operations: determining, in a distance Doppler matrix of the radar (1), points relative to the deviations between the rays received directly from the transmitters (2) and the rays reflected by the movable object (3), transferring to a map to be established a probable zone of location of singularities of the electromagnetic field transmitted or reflected by the ground, crossing several probable zones during the movement of the movable object (3) in order to obtain the location of the singularities.

Abstract: The present invention relates to the detection of intruders (human beings, vehicles or animals) in a protected zone and the departure of individuals from this zone. One or more embodiment of the invention relates to a device which includes a plurality of individual standalone electromagnetic sensors placed on the perimeter of the guarded zone so as to substantially cover this perimeter, and a central unit placed close to the perimeter surrounding the guarded zone. Each sensor takes a measurement of the angular position and of the speed of an intruder present in the zone that it covers. These measurements are relayed to the central unit from the sensor having detected the intruder, through a communication network formed by all of the sensors. The central unit processes the data transmitted by the various sensors and periodically determines the position and trajectory of the detected intruders.