Patents by Inventor Dominique Placko
Dominique Placko has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11615220Abstract: A method implemented by a computer for the real-time simulation of a force and/or of a moment applied to a wing in a fluid flow, wherein the body is previously modelled by at least two scalar and vector point sources of a velocity field, the method including at least one of the steps: assessing at least one element selected among a force and a moment, through a linear function dependent on the main velocity vector, V, of the flow; at least one flow rate, referred to as the scalar mass flow rate, As; and at least one flow rate, referred to as the vector mass flow rate, AR, associated with the sources, on at least one point corresponding to one of the sources.Type: GrantFiled: January 4, 2018Date of Patent: March 28, 2023Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE NORMALE SUPERIEURE PARIS-SACLAY, FLIGHT TRAINING SOLUTIONS CONSULTINGInventors: Dominique Placko, Alain Rivollet, Serge Gourlaouen
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Publication number: 20210312112Abstract: A method for simulating a flow in which a structure is submerged, the method being implemented by computer, and the behavior of the structure in the flow being modeled by radial and rotational sources generating a velocity field representing the flow around the structure.Type: ApplicationFiled: August 8, 2019Publication date: October 7, 2021Inventors: Dominique PLACKO, Jean-Pierre BARBOT, Serge GOURLAOUEN, Alain RIVOLLET
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Patent number: 10684190Abstract: A device measures at least a first physical quantity of fluid flow in a three-dimensional space having at least one predetermined interface, between at least two media. The device comprises a computer prescribing first and second conditions at the different boundaries concerning the first physical quantity, associated respectively with a first source and a second source, different to one another, the first and second sources being point sources of mass flow of fluid and/or of force. The computer calculates, by distributed point source calculation, a first value of the first physical quantity from the first condition and from the first source and a second value of the first physical quantity from the second condition and from the second source, at at least one second point, different from the first test point, then combines the values to calculate for the first physical quantity respectively from the different boundary conditions and sources.Type: GrantFiled: May 22, 2015Date of Patent: June 16, 2020Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, ECOLE NORMALE SUPERIEURE DE CACHANInventors: Dominique Placko, Alain Rivollet, Thierry Bore
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Publication number: 20190354657Abstract: A method implemented by a computer for the real-time simulation of a force and/or of a moment applied to a wing in a fluid flow, wherein the body is previously modelled by at least two scalar and vector point sources of a velocity field, the method including at least one of the steps: assessing at least one element selected among a force and a moment, through a linear function dependent on the main velocity vector, V, of the flow; at least one flow rate, referred to as the scalar mass flow rate, As; and at least one flow rate, referred to as the vector mass flow rate, AR, associated with the sources, on at least one point corresponding to one of the sources.Type: ApplicationFiled: January 4, 2018Publication date: November 21, 2019Inventors: Dominique PLACKO, Alain RIVOLLET, Serge GOURLAOUEN
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Publication number: 20170199097Abstract: A device measures at least a first physical quantity of fluid flow in a three-dimensional space having at least one predetermined interface, between at least two media. The device comprises a computer prescribing first and second conditions at the different boundaries concerning the first physical quantity, associated respectively with a first source and a second source, different to one another, the first and second sources being point sources of mass flow of fluid and/or of force. The computer calculates, by distributed point source calculation, a first value of the first physical quantity from the first condition and from the first source and a second value of the first physical quantity from the second condition and from the second source, at at least one second point, different from the first test point, then combines the values to calculate for the first physical quantity respectively from the different boundary conditions and sources.Type: ApplicationFiled: May 22, 2015Publication date: July 13, 2017Inventors: Dominique PLACKO, Alain RIVOLLET, Thierry BORE
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Patent number: 8818075Abstract: The invention relates to a device and method for estimating defects potentially present in an object comprising an outer surface, wherein the method comprises the steps of: a) illuminating the outer surface of the object with an inductive wave field at a predetermined frequency; b) measuring an induced wave field ({right arrow over (H)}) at the outer surface of the object; c) developing from the properties of the object's material a coupling matrix T associated with a depth Z of the object from the outer surface; d) solving the matrix system ( [ H ? 0 ? 0 ? ] = T · J ? ) to determine a vector ({right arrow over (J)}) at depth Z; e) extracting a sub-vector ({right arrow over (J)}S) from the vector ({right arrow over (J)}) corresponding to a potential defect on the object at depth Z; and f) quantitatively estimating the potential defect from the sub-vector ({right arrow over (J)}S) at depth Z, wherein the method is performed using a computer or processor.Type: GrantFiled: December 28, 2010Date of Patent: August 26, 2014Assignee: Centre National de la Recherche Scientifique (CNRS)Inventors: Dominique Placko, Pierre-Yves Joubert, Alain Rivollet
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Publication number: 20130166257Abstract: The invention relates to a method for modelling the interactions of a wave, generated by a source emitting an impulsive signal of arbitrary shape, with a medium, including steps involving: a) elaboration of a generic model by the method called “DPSM”; b) Fourier series decomposition of the impulsive signal c) For each of the harmonics arising from the foregoing decomposition, calculation of a model specifically for the harmonic in question from the generic model previously elaborated; and d) superposition of a set of specific models thus calculated in order to assemble a final model.Type: ApplicationFiled: January 26, 2011Publication date: June 27, 2013Inventors: Dominique Placko, Pierre-Yves Joubert, Thierry Bore
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Publication number: 20120308120Abstract: The invention relates to a device and method for estimating defects potentially present in an object comprising an outer surface, wherein the method comprises the steps of: a) illuminating the outer surface of the object with an inductive wave field at a predetermined frequency; b) measuring an induced wave field ({right arrow over (H)}) at the outer surface of the object; c) developing from the properties of the object's material a coupling matrix T associated with a depth Z of the object from the outer surface; d) solving the matrix system ? ? ? ( [ H ? 0 ? ? ] = T · J ? ) ? ? indicates text missing or illegible when filed in order to determine a vector ({right arrow over (J)}) at depth Z; e) extracting a sub-vector ({right arrow over (J)}S) from the vector ({right arrow over (J)}) corresponding to a potential defect on the object at depth Z; and f) quantitatively estimating the potential defect from the sub-vector ({right arrow over (J)}S) at depth Z.Type: ApplicationFiled: December 28, 2010Publication date: December 6, 2012Applicant: Centre National de la Recherche Scientifique (CNRS)Inventors: Dominique Placko, Pierre-Yves Joubert, Alain Rivollet
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Patent number: 8126686Abstract: A method for modeling the interactions between objects. The surface the objects define an interface between media. A set of elementary characteristic functions are chosen that correspond to the field of application. The physical properties the media are defined. Each object is modelled as a mesh and elementary point sources are associated with either side of each mesh element. The type of boundary conditions are determined for each interface. The global matrix for the interactions between the various objects is constructed, depending on the type of boundary conditions, the properties of the media and the configuration of the system. The global matrix is inverted. The inverted matrix is multiplied by a column matrix of the excitation boundary conditions. A column matrix is obtained containing the elementary point sources. At every point, the physical quantities representative of the interactions are calculated and an analytical model of the interactions is obtained.Type: GrantFiled: December 20, 2006Date of Patent: February 28, 2012Assignees: Centre National de la Recherche Scientifique, University of ArizonaInventors: Dominique Placko, Tribikram Kundu, Aurélie Cruau, Nicolas Liebeaux
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Publication number: 20100010781Abstract: The present invention relates to a method for modeling the interactions within a system between at least one object. The surface of each object defines an interface between at least two media. The set of elementary characteristic functions are chosen that correspond to the field of application in question. The physical properties of each medium considered composing the system are defined. Each object of the system is created by modeling it as a mesh and at least one elementary point source is associated with either side of each mesh element. The type of boundary conditions are determined for each interface. The global matrix for the interactions between the various objects is constructed, depending on the type of boundary conditions, the properties of the media and on the configuration of the system. The global matrix is inverted. The inverted matrix is multiplied by a column matrix containing the values of the excitation boundary conditions.Type: ApplicationFiled: December 20, 2006Publication date: January 14, 2010Applicants: Centre National De La Recherche Scientifique, University of ArizonaInventors: Dominique Placko, Tribikram Kundu, Aurélie Cruau, Nicolas Liebeaux
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Patent number: 7271900Abstract: A quantitative magneto-optical imaging method is used to form an image of a target material. An active material is placed close to the target material and produces a Faraday rotation in a polarized light beam. The Faraday rotation of the active material is essentially proportional to the magnetization of the target material when this latter is subjected to an exciting magnetic field. Photodetector means detect the beam reflected after passing through the active material. The light from the reflected beam can then be analyzed for obtaining the amplitude and phase of an interfering magnetic field generated by a defect in the target material.Type: GrantFiled: June 24, 2004Date of Patent: September 18, 2007Assignee: Centre National De La Recherche Scientifique (CNRS)Inventors: Jean-Marc Decitre, Michel Lemistre, Jamal Ben Youssef, Francois Lepoutre, Dominique Placko, Pierre-Yves Joubert
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Publication number: 20060146328Abstract: A quantitative magneto-optical imaging method is used to form an image of a target material. An active material is placed close to the target material and produces a Faraday rotation in a polarized light beam. The Faraday rotation of the active material is essentially proportional to the magnetization of the target material when this latter is subjected to an exciting magnetic field. Photodetector means detect the beam reflected after passing through the active material. The light from the reflected beam can then be analyzed for obtaining the amplitude and phase of an interfering magnetic field generated by a defect in the target material.Type: ApplicationFiled: June 24, 2004Publication date: July 6, 2006Applicant: Centre National De La Recherche Sceintifique (CNRS)Inventors: Jean-Marc Decitre, Michel Lemistre, Jamal Ben Youssef, Francois Lepoutre, Dominique Placko, Pierre-Yves Joubert
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Publication number: 20060129342Abstract: The invention relates to the modelling of the interactions between an incident wave and an obstacle, in particular in the area of nondestructive testing. According to the invention, the surface of the obstacle is meshed and at least one source (Si) is allocated to each surface element (dSi). Boundary conditions are then calculated at each mesh cell of the obstacle and source values are deduced therefrom. On the basis of an interaction matrix and of these source values, a physical quantity representative of the interaction between the wave and the obstacle is estimated at any point of space.Type: ApplicationFiled: November 6, 2003Publication date: June 15, 2006Applicants: CENTRE NATIONAL DE LE RE RECHERCHE SCIENTIFIQUE-CNRS, UNIVERSITY OF ARIZONA, UNIVERSITE PARIS SUD (PARIS 11)Inventors: Dominique Placko, Nicolas Liebeaux
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Publication number: 20050228208Abstract: Device for health monitoring of a structure comprising a dielectric material of permittivity ?r, comprising a source of electromagnetic radiation, generating an electric field in the structure a detector measuring a component of the electric field, calculation means giving the value of ?r on the basis of the said component.Type: ApplicationFiled: March 30, 2004Publication date: October 13, 2005Inventors: Michel Lemistre, Dominique Placko
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Patent number: 5117181Abstract: The invention makes it possible to detect and measure the movement of a moving member (50) through an amagnetic or low permeability metal wall. The installation requires ferromagnetic material targets placed at regular intervals over the moving member. The transducer is positioned facing the moving member by its detection face (16). It comprises two ferromagnetic cores (2, 8) surrounded both by an exciting coil (4) and a measuring coil (10), at whose terminals the measuring signal is taken. The latter is proportional to the variable reluctance of the magnetic circuit, which varies as a function of the position of the ferromagnetic targets (48). The transducer is completed by a balancing core (34). Application to the measurement of the displacement of control rods in the vessel of a pressurized water reactor.Type: GrantFiled: December 12, 1990Date of Patent: May 26, 1992Assignee: Commissariat a l'Energie AtomiqueInventors: Henri Clergeot, Dominique Placko, Michel Plantevin