Patents by Inventor Stéphane Bonnet
Stéphane Bonnet 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: 8301575Abstract: This method uses two sets of sensors to estimate certain characteristics of the movement of a device or a person or states, especially postures, they adopt. A first, abundant, set of sensors (1) is removed after a learning phase where it records with certainty the states obtained by interpreting first decisional rules. The measurements of a second set of sensors (2), much more restricted than the first, are correlated to the states reached during the learning period by second decisional rules automatically obtained by supplying a classifier. They are then interpreted to determine the new states reached by the wearer just by means of the second sensors. The results are good in spite of the low number of second sensors, thanks to the accuracy of the second decisional rules.Type: GrantFiled: July 23, 2008Date of Patent: October 30, 2012Assignee: Commissariat a l'Energie AtomiqueInventors: Stephane Bonnet, Christelle Godin
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Patent number: 8265353Abstract: Measurements of a mobile object and particularly a living being are made using two techniques, normally radiation attenuation and radiation emission, in synchronization to provide images of the object state. Movement displacement fields from one phase to the next are estimated for both techniques, but the final images obtained by the emission technique are improved by the knowledge of the displacement field obtained by the other technique that is more precise.Type: GrantFiled: September 30, 2004Date of Patent: September 11, 2012Assignee: Intellectual Ventures fund 23 LLCInventors: Stéphane Bonnet, Pierre Grangeat
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Publication number: 20120185204Abstract: The invention relates to a method for estimating the orientation in an inertial reference frame of a solid in motion equipped with an accelerometer and a magnetometer which are mounted on said solid. According to this method, an orientation of the solid is measured at a reference instant, said orientation being defined by a rotation matrix for rotating from the mobile reference frame of the solid at the reference instant to the inertial reference frame. A rotation matrix for rotating between the orientation of the solid at a subsequent instant n and said orientation of the solid at the reference instant is thereafter estimated. The orientation of the solid at the instant n is thereafter determined with the aid of the previously estimated rotation matrix and of the known orientation of the solid at the reference instant.Type: ApplicationFiled: July 26, 2010Publication date: July 19, 2012Applicants: Commissariat A L'Energie Atomique et aux Energies Alternatives, MoveaInventors: Pierre Jallon, Stéphane Bonnet
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Publication number: 20120165705Abstract: A system for detecting an epileptic seizure in a prone person, comprising: at least one motion sensor with at least one measurement axis having fastening means for securing said motion sensor to said person; first means for determining a first probability of at least a first state transition diagram of the nocturnal activity of a prone person with respect to data representing the measurement signals of the motion sensor, said first diagram comprising predetermined probabilities of oriented transitions between two different or identical states, the probabilities of the states of said first diagram being predetermined; and second means for determining a second probability of at least a second state transition diagram for an epileptic seizure with respect to data representing the measurement signals of the motion sensor, said second diagram comprising predetermined probabilities of oriented transitions between two different or identical states, the probabilities of the states of said second diagram being predType: ApplicationFiled: August 19, 2009Publication date: June 28, 2012Applicant: MOVEAInventors: Pierre Jallon, Stéphane Bonnet
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Publication number: 20120071780Abstract: A classification method for classifying neural signals, the method comprising the following steps: a) using a plurality of electrodes over a determined period of time to acquire a plurality of neural signal samples; b) estimating a covariance matrix of said neural signals; and c) classifying said neural signals, the classification being performed: either in the Riemann manifold of symmetric positive definite matrices of dimensions equal to the dimensions of said covariance matrix; or else in a tangent space of said Riemann manifold. A method of selecting neural signal acquisition electrodes based on the Riemann geometry of covariance matrices of said signals. An application of said classification method and of said method of selecting electrodes to direct neural control.Type: ApplicationFiled: July 12, 2011Publication date: March 22, 2012Applicant: Commissariat A L'Energie Atomique Et Aux Energies AlternativesInventors: Alexandre Barachant, Stéphane Bonnet
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Publication number: 20120041713Abstract: A system for detecting the walk of a person has a housing (BT) with at least a biaxial movement sensor (CM). The housing is attached to the upper portion of the body of the person, so that a first measurement axis of the sensor (CM) coincides with the anteroposterior axis (AP) or the vertical axis (VT) of the body and so a second measurement axis of said sensor (CM) coincides with the mediolateral axis (ML) of the body. An analysis means (MA) analyzes the measurements delivered by the sensor (CM). The analysis means includes a processing means (MT) for processing over a time window the measurement signals delivered by the sensor (CM), which includes means for searching for a dominant frequency (MRFD) in said signals.Type: ApplicationFiled: February 25, 2010Publication date: February 16, 2012Applicant: Le Pulsar 5eme etageInventor: Stéphane Bonnet
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Publication number: 20120041293Abstract: A method for estimating a level of noise affecting a sampled and digitized pulse signal, such as a neural action potential signal; detecting signal pulses by thresholding, the threshold being determined by estimating a level of noise according to the method; and classifying thus-detected signals. An implantable device can carry out the methods. The method and device are applicable to the field of embedded signal processing for multiple electrode arrays implanted in a neural tissue such as a brain.Type: ApplicationFiled: December 23, 2008Publication date: February 16, 2012Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENE ALTInventors: Timothée Levi, Jean-François Beche, Stéphane Bonnet, Ricardo Escola
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Patent number: 7890291Abstract: A method for detecting a substantially invariant rotation axis of a motion of a mobile body equipped with at least one inertial or magnetic sensor with three sensitive axes that includes acquiring physical measurements with respect to the three sensitive axes of the sensor, the physical measurements including at least three samples at different times, estimating a substantially invariant rotation axis in the physical measurements space, and identifying the estimated axis as the substantially invariant rotation axis of the motion. In one aspect, the method is applicable for estimating the motion of a mobile body rotating about a substantially invariant axis.Type: GrantFiled: April 24, 2008Date of Patent: February 15, 2011Assignees: Commissariat a l'Energie Atomique, Universite Joseph Fourier, Institut National Polytechnique de GrenobleInventors: Christelle Godin, Stèphane Bonnet, Alain Barraud, Suzanne Lesecq
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Publication number: 20100198163Abstract: The invention relates to a protection device (10) for a needle of an assembly or of an injection device having a hub portion provided with a needle, the said protection device (10) comprising: an outer casing (20) formed of a first material; and an inner casing (30) formed of a second material different from the said first material and defining a cavity (32) for receiving in a sealing way at least the hub portion, said cavity (32) having an inner wall (34); attachment means (40) defined in the said cavity (32) to removably engage and secure said protection device (10) at least along a sealing line to the injection device; the protection device being characterized in that it further comprises aspiration limiting means (40, 50) for limiting the deformation of said cavity (32) when said protection device (10) is separated from the assembly or the injection device.Type: ApplicationFiled: March 3, 2008Publication date: August 5, 2010Inventor: Stéphane Bonnet
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Patent number: 7661200Abstract: A sensor worn by a person measures movements of the person. Movements of orientation are not expressed by rotations leading from a stationary reference point to a reference point associated with the sensor, but by angles separating axes or planes of the stationary reference point and axes associated with the wearer, thereby making it possible to better identify his/her movements and his/her activity. The sensor can be applied to the monitoring of patients.Type: GrantFiled: March 30, 2005Date of Patent: February 16, 2010Assignee: Commissariat a l'Energie AtomiqueInventors: Stephane Bonnet, Regis Guillemaud
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Publication number: 20090198155Abstract: A device for analyzing the gait of a person, wherein the device comprises: a magnetometer for fastening to a tibial segment of said person, in order to generate a signal representative of at least one projection onto a sagittal plane of an ambient magnetic field in which it is immersed; and signal processor means for identifying instants and/or phases that are characteristic of the gait of said person from said signal generated by said magnetometer. Advantageously, said signal processor means are adapted to identify characteristic instants of the person's gait by identifying particular points in the expression as a function of time for said signal generated by said magnetometer.Type: ApplicationFiled: February 3, 2009Publication date: August 6, 2009Applicant: COMMISSARIAT A L' ENERGIE ATOMIQUEInventor: Stephane BONNET
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Publication number: 20090042179Abstract: A first light source has a first wavelength corresponding to an excitation wavelength of a fluorophore. The excitation wavelength and an emission wavelength of the fluorophore delineate a predetermined interval. A second light source has a second wavelength offset with respect to the first wavelength so as to be outside said predetermined interval. The offset between the first and second wavelengths is comprised between 30 nm and 100 nm. A camera comprises a filter opaque to the first and second wavelengths and transparent to the emission wavelength and to wavelengths substantially higher than the higher of the first and second wavelengths. The light sources and camera are synchronized to alternately activate one of the light sources and make the camera alternately acquire a fluorescence image and a background noise image.Type: ApplicationFiled: January 20, 2006Publication date: February 12, 2009Applicant: Commissariat A L'Energie AtomiqueInventors: Philippe Peltie, Michel Berger, Roland Sauze, Stephane Bonnet
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Publication number: 20090030345Abstract: This method uses two sets of sensors to estimate certain characteristics of the movement of a device or a person or states, especially postures, they adopt. A first, abundant, set of sensors (1) is removed after a learning phase where it records with certainty the states obtained by interpreting first decisional rules. The measurements of a second set of sensors (2), much more restricted than the first, are correlated to the states reached during the learning period by second decisional rules automatically obtained by supplying a classifier. They are then interpreted to determine the new states reached by the wearer just by means of the second sensors. The results are good in spite of the low number of second sensors, thanks to the accuracy of the second decisional rules.Type: ApplicationFiled: July 23, 2008Publication date: January 29, 2009Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Stephane BONNET, Christelle Godin
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Publication number: 20090012921Abstract: A classification method including first classifying an event of any kind by first rules, and then second classifying events, not identified by the first classification, by a learning base reinforced with all the events identified by the first classification. The method is adaptive if the second classification rules are amended according to new examples that were able to be determined by the first rules.Type: ApplicationFiled: February 2, 2007Publication date: January 8, 2009Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Stephane Bonnet, Christelle Godin
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Publication number: 20080281555Abstract: A method for detecting a substantially invariant rotation axis of a motion of a mobile body equipped with at least one inertial or magnetic sensor with three sensitive axes that includes acquiring physical measurements with respect to the three sensitive axes of the sensor, the physical measurements including at least three samples at different times, estimating a substantially invariant rotation axis in the physical measurements space, and identifying the estimated axis as the substantially invariant rotation axis of the motion. In one aspect, the method is applicable for estimating the motion of a mobile body rotating about a substantially invariant axis.Type: ApplicationFiled: April 24, 2008Publication date: November 13, 2008Inventors: Christelle Godin, Stephane Bonnet, Alain Barraud, Suzanne Lesecq
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Patent number: 7423537Abstract: A person under supervision wears a sensor consisting of at least one accelerometer (31) and a magnetometer (41), oriented in his vertical direction. A fall event is picked up when a significant and rapid oscillation of the acceleration signal coincides with a shift in the ambient magnetic field between two levels (between t=4000 and t=5000). Additional criteria that may also make use of the magnetometer enable the diagnosis to be made, and it is easier and safer to establish this than with accelerometers alone.Type: GrantFiled: June 5, 2006Date of Patent: September 9, 2008Assignee: Commissariat a l'Energie AtomiqueInventors: Stephane Bonnet, Regis Guillemaud
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Publication number: 20070186429Abstract: A sensor worn by a person measures movements of the person. Movements of orientation are not expressed by rotations leading from a stationary reference point to a reference point associated with the sensor, but by angles separating axes or planes of the stationary reference point and axes associated with the wearer, thereby making it possible to better identify his/her movements and his/her activity. The sensor can be applied to the monitoring of patients.Type: ApplicationFiled: March 30, 2005Publication date: August 16, 2007Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Stephane Bonnet, Regis Guillemaud
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Publication number: 20060279426Abstract: A person under supervision wears a sensor consisting of at least one accelerometer (31) and a magnetometer (41), oriented in his vertical direction. A fall event is picked up when a significant and rapid oscillation of the acceleration signal coincides with a shift in the ambient magnetic field between two levels (between t=4000 and t=5000). Additional criteria that may also make use of the magnetometer enable the diagnosis to be made, and it is easier and safer to establish this than with accelerometers alone.Type: ApplicationFiled: June 5, 2006Publication date: December 14, 2006Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUEInventors: Stephane Bonnet, Regis Guillemaud
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Publication number: 20050285857Abstract: Measurements of a mobile object and particularly a living being are made using two techniques, normally radiation attenuation and radiation emission, in synchronisation to provide images of the object state. Movement displacement fields from one phase to the next are estimated for both techniques, but the final images obtained by the emission technique are improved by the knowledge of the displacement field obtained by the other technique that is more precise.Type: ApplicationFiled: September 30, 2004Publication date: December 29, 2005Inventors: Stephane Bonnet, Pierre Grangeat
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Patent number: 6527090Abstract: An axially guiding and radially retaining spring (3) for a friction element (15) of a disk brake. The spring (3) includes a throat section (5) mounted by being snap-locking onto a protrusion (7) of a support member (9).Type: GrantFiled: November 27, 2000Date of Patent: March 4, 2003Assignee: Robert Bosch GmbHInventors: Alain Barillot, Olivier Kubic, Christophe Chauveau, Stéphane Bonnet