Centre National De La Recherche Scientifique

Ecole Superieure De Physique Et De Chimie Industrielles De La Ville De Paris

Supersonic Imagine

Aml Systems

Greenerwave

Safran

Electricite De France

Centre National De La Recherche Scientifique-cnrs

Alexandre Aubry

Mathias Fink

William Lambert

Thomas Frappart

Arnaud Derode

Geoffroy Lerosey

Hassan Koulouh

Cyril Rivier

Victor Barolle

Claude Boccara

Amaury Badon

Laura Cobus

Fabrice Lemoult

Claire Prada

Philipp Del Hougne

Claudio Chiattelli

Timmy Floume

Flavien Bureau

Benoit Gerardin

Cecile Brutt

Michel Rinzler

Camille Trottier

Daniel Lopez

Cécile Brutt

Stéphane Widiez

Device for dehumidifying a closed casing. The device for dehumidifying comprises a box comprising an inlet communicating with the interior of the closed casing and an outlet, a heating module able to be controlled to generate heat, a desiccant configured to adsorb moisture when it is not heated by the heating module and to return adsorbed moisture by desorption when it is heated by the heating module, a mobile plug able to be moved to alternately open and close the inlet and the outlet, a bias spring configured to move the mobile plug when the heating module does not heat the desiccant and a shape memory alloy spring configured to move the mobile plug when the heating module heats the desiccant, said shape memory alloy spring being able to be heated by the heating module at the same time as the desiccant. The device for dehumidifying is suited for dehumidifying any type of closed casing, it is cost efficient both in design and in power consumption, and it is easy to implement thanks to its small size and its simple design.

Device for dehumidifying a closed casing

A device, for non-destructive testing of a mechanical part made of a polycrystalline material, includes: an ultrasonic probe including a two-dimensional array of transducers capable of emitting and receiving signals at different excitation angles; and a processing module suitable for controlling the emission and the reception of the transducers, for processing the signals received by the transducers so as to express the signals received by the ultrasonic probe in two planar wave planes constructed from the emission and reception wave vectors of the probe, and for deducing therefrom information representative of the three-dimensional orientation of the fiber structure of the mechanical part.

Non-destructive testing of a mechanical part made of a polycrystalline material

Method for non-invasively characterizing a heterogeneous medium using ultrasound, comprising a step of generating a series of incident ultrasonic waves, a step of recording an experimental reflection matrix R(t) defined between the input emission basis (i) and an output reception basis (u), a step of determining a response REP(r,Δr) of the medium between an input virtual transducer (TV) calculated based on an input focusing of the experimental reflection matrix that creates an input focal spot around a first point (P), and an output virtual transducer (TV) calculated based on an output focusing of the experimental reflection matrix that creates an output focal spot around a second point (P), said response being expressed as a function of a central point (PC) of spatial position (r) in the medium located midway between the first and second points (P, P).

Method and system for non-invasively characterizing a heterogeneous medium using ultrasound

Method for ultrasonic characterization of a medium, including generating a series of incident ultrasonic waves, generating an experimental reflection matrix R(t) defined between the emission basis (i) as input and a reception basis (u) as output, and determining a focused reflection matrix RFoc(r, r, δt) of the medium between an input virtual transducer (TV) calculated based on a focusing as input to the experimental reflection matrix and an output virtual transducer (TV) calculated based on a focusing as output from the experimental reflection matrix, the responses of the output virtual transducer (TV) being obtained at a time instant that is shifted by an additional delay δt relative to a time instant of the responses of the input virtual transducer (TV).

Method and system for ultrasonic characterization of a medium

Method and system for ultrasonic characterization of a medium Method for ultrasonic characterization of a medium, comprising generating a series of incident ultrasonic waves, generating an experimental reflection matrix Rui(t) defined between the emission basis (i) as input and a reception basis (u) as output, determining a focused reflection matrix RFoc(rin, r, at) of the medium between an input virtual transducer (Win) calculated based on a focusing as input to the experimental reflection matrix and an output virtual transducer (TVout) calculated based on a focusing as output from the experimental reflection matrix, the responses of the output virtual transducer (TVout) being obtained at a time instant that is shifted by an additional delay 6t relative to a time instant of the responses of the input virtual transducer (TVin).

Method for ultrasonic characterization of a medium, comprising generating a series of incident ultrasonic waves, generating an experimental reflection matrix R(t) defined between the emission basis (i) as input and a reception basis (u) as output, and determining a focused reflection matrix RFoc(r, r, &#x3b4;t) of the medium between an input virtual transducer (TV) calculated based on a focusing as input to the experimental reflection matrix and an output virtual transducer (TV) calculated based on a focusing as output from the experimental reflection matrix, the responses of the output virtual transducer (TV) being obtained at a time instant that is shifted by an additional delay &#x3b4;t relative to a time instant of the responses of the input virtual transducer (TV).

The present invention relates to a method for the non-invasive optical characterization of a heterogeneous medium, comprising: a step of illuminating, by means of a series of incident light waves, a given field of view of the heterogeneous medium, positioned in a focal plane of a microscope objective (); a step of determining a first distortion matrix (D, D) in an observation basis defined between a conjugate plane of the focal plane (FP) and an observation plane, said first distortion matrix corresponding, in a correction basis defined between a conjugate plane of the focal plane and an aberration correction plane, to the term-by-term matrix product of a first reflection matrix (R) of the field of view, determined in the correction basis, with the phase conjugate matrix of a reference reflection matrix, defined for a model medium, in said correction basis; and a step of determining, from the first distortion matrix, at least one mapping of a physical parameter of the heterogeneous medium.

Method and systems for the non-invasive optical characterization of a heterogeneous medium

Method for determining a characteristic of detection and/or identity information and/or location information of a receiver, wherein: a) a primary wave is emitted by an antenna, b) adjustable elements are controlled with a plurality of sets of parameters, to modify the propagation of a primary wave and/or of a secondary wave coming from the receiver, and c) signals received by the antenna are saved, and d) the characteristic of the receiver in the medium is determined based on the signals received for each set of parameters.

Method for determining a characteristic of a receiver in a medium, and system implementing this method

In a first aspect, the present description relates to a system for non-invasively characterizing a heterogeneous medium using ultrasound, comprising at least one first array () of transducers configured to generate a series of incident ultrasound waves in a region of said heterogeneous medium and record the ultrasound waves which are backscattered by said region as a function of time, as well as a computing unit () which is coupled to said at least one first array of transducers and configured to: record an experimental reflection matrix defined between an emission basis at the input and the basis of the transducers at the output; determine, from said experimental reflection matrix, at least one first wideband reflection matrix defined in a focused base at the input and output; determine a first distortion matrix defined between said focused basis and an observation basis, said first distortion matrix resulting, directly or after a change of basis, from the term-by-term matrix product of said first wideband reflection matrix defined between said focused basis and an aberration correction basis, with the phase-conjugated matrix of a reference reflection matrix defined for a model medium, between the same bases; determine, from said first distortion matrix, at least one mapping of a physical parameter of said heterogeneous medium.

Methods and systems for non-invasively characterizing a heterogeneous medium using ultrasound

A communication network includes an access point, a control unit in communication with the access point, a wave shaping device in communication with the control unit, and a wireless communication device. The control unit determines parameters of the wave shaping device, the parameters being search parameters if the control unit does not receive a pilot signal, and optimization parameters if the control unit receives a pilot signal.

Communication network access point, communication network, and method of wireless communication

An incident wave is emitted into a medium comprising diffusers that can reflect the wave. Signals representing a reflected wave reverberated by the medium from the incident wave are captured, said captured signals being the sum of a simple diffusion component and a multiple diffusion component. The captured signals are treated by separating the multiple diffusion component from the simple diffusion component.

Method and device for probing by wave propagation

The invention relates to a spotlight () for a motor vehicle that has a light source () producing a beam of light which is directed along a first axis (X) intended to be oriented towards the front of the vehicle and a lens (), wherein the light source () projects all of the beam directly onto the lens () without reflection nor obturation, and the lens () is arranged to move in rotation about a second axis (Z) intended to be oriented towards the top of the vehicle.

Spotlight for a motor vehicle

The invention relates to a wave-propagation-based sounding method, in which: an incident wave is emitted through a medium including diffusers capable of reflecting the wave; and, subsequently, signals representing a reflected wave reverberated by the medium from the incident wave are captured, said captured signals being the sum of a single scattering component and a multiple scattering component. The captured signals are processed by separating the multiple scattering component from the single scattering component by filtering at least one frequency transfer matrix representing responses between transducers from the transducer assembly.

Growing community of inventors

Ivry-sur-Seine, France

Alexandre Aubry