Commissariat à l'énergie atomique et aux énergies alternatives Patent applications |
Patent application number | Title | Published |
20130315547 | OPTICAL WAVEGUIDE HAVING A VARYING INDEX GRADIENT - A photoacoustic detection device including a nanophotonic circuit including a first chip on which is formed at least one optical waveguide and in which is formed a set of cavities defining a Helmholtz resonator; at least one optical source capable of emitting an optical signal in a given wavelength range, capable of being modulated at an acoustic modulation frequency, this source being attached to the first chip; a second chip forming a cap for said cavities and including acoustic sensors; and electronic circuits for processing the output of the acoustic sensors formed in the first or the second chip. Further, an optical waveguide comprising, on a silicon substrate, a silicon germanium core with a variable germanium concentration along a direction perpendicular to the substrate, said core being covered with a cladding silicon layer. | 11-28-2013 |
20130241346 | DEVICE FOR CONVERTING MECHANICAL ENERGY INTO ELECTRICAL ENERGY - An apparatus for converting mechanical vibrational energy into electrical power includes first and second collecting electrodes configured for connection to terminals of an electrical load, and an electret placed facing the first electrode. The electret is mounted so as to move relative to the first electrode in one degree-of-freedom in a plane. Relative movement between the electret and the first electrode induces a potential difference across the electrodes. The electret has a continuous layer and a series of protrusions, each of which extends perpendicular to the plane. These protrusions are distributed in the degree-of-freedom with a first pitch, which is smaller than the travel between the first electrode and the electret. The first electrode has faces facing the electret. These faces are distributed in the degree-of-freedom with a second pitch identical to the first pitch. | 09-19-2013 |
20130112974 | METHOD FOR DETERMINING THE LOCAL STRESS INDUCED IN A SEMICONDUCTOR MATERIAL WAFER BY THROUGH VIAS - A method for determining, in a first semiconductor material wafer having at least one through via, mechanical stress induced by the at least one through via, this method including the steps of: manufacturing a test structure from a second wafer of the same nature as the first wafer, in which the at least one through via is formed by a substantially identical method, a rear surface layer being further arranged on this second wafer so that the via emerges on the layer; measuring the mechanical stress in the rear surface layer; and deducing therefrom the mechanical stress induced in the first semiconductor material wafer. | 05-09-2013 |
20120313626 | METHOD AND DEVICE FOR IDENTIFYING A SUBSET OF MEASUREMENTS, METHOD AND SYSTEM FOR LOCATING AN OBJECT, RECORDING MEDIUM FOR THESE METHODS - Identifying measurement subset comprising a disturbed measurement disturbed by a magnetic disturber includes emitting and measuring magnetic fields using mono-axial source/mono-axial transducer pairs to obtain real measurements distinguished by position of a source used to emit the field, position of transducer used to measure the field, and field frequency, a source being tied to a mobile object and the transducer tied to a frame of reference in which a position of the mobile object is to be expressed (or vice versa), estimating position of the object in the reference frame based on an observer and involving only a first subset of the measurements, estimating the measurements based at least in part on the estimated position Pi and on a direct model linking the object's position to the measurements, and determining whether or not the first measurement subset comprises a disturbed measurement by comparing the estimated and real measurements. | 12-13-2012 |
20120268172 | OSCILLATION DETECTOR - An oscillation detector having an RF oscillator configured to be synchronized with a first frequency and a comparator for distinguishing the synchronized state from the non-synchronized state of the radiofrequency oscillator on the basis of an oscillating signal produced by the radiofrequency oscillator and indicating the presence of oscillations in a frequency band around the first frequency in response to identifying the synchronized state and, in alternation, indicating the absence of oscillations in this frequency band otherwise. | 10-25-2012 |
20120264373 | METHOD FOR DETECTION OF A CONTACTLESS RECEIVER - A method for detecting a contactless receiver in a field of an antenna of a contactless reader includes during a first ramp interval, exciting the antenna by applying a potential difference comprising a ramp between first and second values of the potential difference, and during a first plateau interval following the first ramp interval, maintaining the potential difference at the second value of the potential difference, while maintaining the potential difference at the plateau, measuring a response of the antenna, comparing the measured response and a reference response, and determining presence of a contactless receiver in the field of the antenna based at least in part on a result of the comparison. | 10-18-2012 |
20120186976 | METAL-SUPPORTED ELECTROCHEMICAL CELL AND METHOD FOR FABRICATING SAME - A metal-supported electrochemical cell is provided. The cell may contain a porous metal support comprising a first- and a second-main surfaces, a porous thermomechanical adaptive layer on the second main surface, a porous layer that is a barrier against the diffusion of chromium on the porous thermomechanical adaptive layer, this porous barrier layer being in stabilised zirconia and/or substituted ceria, and in a mixed oxide of spinel structure, a porous hydrogen electrode layer on the porous barrier layer, a dense electrolyte layer on the porous hydrogen electrode layer; a dense or porous reaction barrier layer on the dense electrolyte layer, and a porous oxygen or air electrode layer on the reaction barrier layer. A method for fabricating a metal-supported electrochemical cell is also provided. The method may comprise a step for the simultaneous sintering of the green support and of all the previously deposited layers in the green state. | 07-26-2012 |
20120128555 | METHOD FOR TREATING SPENT NUCLEAR FUEL - A method for treating spent nuclear fuel, which includes first decontaminating the uranium, plutonium and neptunium found in a nitric aqueous phase resulting from dissolving the nuclear fuel in HNO | 05-24-2012 |
20120041719 | METHOD FOR ELECTROMAGNETICALLY CHARACTERIZING A TARGET - A method for electromechanically characterizing an object placed in a chamber, at least some walls of which have low absorbance at said frequency, one of the chamber walls being provided with an antenna array. In a first step, the parameters S of a first system consisting of the chamber and the antenna array are measured and in a second step, the same parameters S of a second system consisting of the chamber, the object and the antenna array are measured. The parameters S of the first system are subtracted from the parameters S of the second system to obtain a matrix of corrected parameters that is then diagonalized. The eigenvalues of the matrix constitute a characteristic electromagnetic signature of said object. | 02-16-2012 |
20110298441 | Converter Circuit and Electronic System Comprising Such a Circuit - A converter circuit to be connected to an electrical energy source capable of showing major fluctuations in delivered power includes a chopper circuit with a variable duty cycle and connectable to the electrical energy source, an output circuit adapted for connection to the chopper circuit, a control loop for tracking an MPP of the energy source connected to an output of the energy source, and a control unit configured to command, at predefined intervals, changes in the chopper circuit's duty cycle as a function of the control loop's set-value signal. The control loop includes means for analog storage of pieces of information corresponding to output voltages from the energy source for at least three successive duty cycles, and an analog comparison unit delivering an output, as a function of the stored pieces of information, and a set-value signal for increasing or reducing of the duty cycle by the control unit. | 12-08-2011 |
20110262313 | DEVICE FOR PRODUCING HYDROGEN BY MEANS OF AN ELECTRON CYCLOTRON RESONANCE PLASMA - A device includes a chamber to contain plasma, a water vapor injector to inject water vapor into the chamber, a high-frequency wave injector to inject a high-frequency wave inside the chamber, a magnetic structure to generate a magnetic field in the chamber and to generate plasma along the magnetic field lines, a module of the magnetic field presenting a magnetic mirror configuration with at least one electron cyclotron resonance zone to at least partially dissociate the water molecules introduced in vapor phase and to at least partially ionize the products of dissociation. The magnetic mirror configuration is such that the module of the magnetic field presents a nonpoint-shaped minimum, substantially constant, and substantially equal to the magnetic field corresponding to electron cyclotron resonance and at least partially extending along the chamber, such that the plasma has the form of a plasma surface; the water vapor injector injecting the vapor in the form of a supersonic jet and including a planar nozzle and a divertor. The device also includes a selective cryogenic condenser to freeze the oxygen coming from the dissociation without freezing the hydrogen coming from the dissociation and a hydrogen recovery unit configured to recover the hydrogen coming from the dissociation, the oxygen being trapped by the cryogenic condenser. | 10-27-2011 |
20110210668 | ELECTRON CYCLOTRON RESONANCE ION GENERATOR - An electron cyclotron resonance ion generator includes a vacuum-tight chamber configured to contain a plasma, a magnetic field generator configured to generate a magnetic field in the chamber, a waveguide configured to propagate a high-frequency wave inside the chamber, a first ionisation stage located at one end of the chamber, the first stage including an ionisation zone in which ions are generated, the magnetic field being approximately parallel to a longitudinal axis in the ionisation zone, a second magnetic confinement stage for the ions generated in the ionisation zone, the second stage using a first high-frequency wave being propagated in the chamber from the waveguide, the magnetic field being approximately parallel to the longitudinal axis between the ionisation zone and the second confinement stage, such that the ions generated in the ionisation zone migrate towards the second confinement stage and the first and second stages contain the same continuous plasma. | 09-01-2011 |
20110136527 | METHOD FOR CONTROLLING POWER IN A CELLULAR NETWORK WITH A SURPLUS OF TRANSMISSION RESOURCES - A method for controlling the transmission power of a terminal in a cellular telecommunications network, in which the number of transmission resources is greater than the number of users is disclosed. In one aspect, the number of additional transmission resources necessary for the communication of the user if a modulation and coding scheme with minimal spectral efficiency is used, and whether these resources are available, are determined, they are allocated to the user, and the transmission power of the terminal is set to the transmission power enabling the required quality of service to be obtained by using the predetermined modulation and coding scheme. | 06-09-2011 |