Patents by Inventor Olivier Chetelat

Olivier Chetelat 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).

  • Patent number: 10105072
    Abstract: Measurement device for measuring a bio-impedance and/or a bio-potential of a human or animal body and adapted to be worn on the body, including: at least two electrode sensors. Each of the at least two electrode sensors includes a first electrical contact configured to be in electrical contact with the skin of the body when the system is worn, and a second electrical contact. A single electrical connector electrically connects the at least two electrode sensors with each other via the second electrical contact. An active device is configured to cooperate with a subset of the at least two electrode sensors such that the potential of the electrical connector is substantially equal to a projected potential determined from the potential of the first electrical contact of each electrode sensor of the subset when the measurement device is worn.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: October 23, 2018
    Assignee: CSEM CENTRE SUISSE D'ELECTRONIQUE ET DE MICROTECHNIQUE SA—RECHERCHE ET DÉVELOPPEMENT
    Inventors: Olivier Chetelat, Marc Correvon
  • Patent number: 9839370
    Abstract: Method for bio impedance measurement on a skin surface of a living body, using a bio impedance measurement device having a sensing electrode and a pilot electrode, includes the steps of placing the sensing electrode and pilot electrode on the surface of the body; providing a guard electrode adapted to separate the surface in at least two zones, among which a sensing zone including the sensing electrode and a current injection zone including the pilot electrode; providing a controller, electrically connected to the electrodes, adapted to control the current source; and controlling the potential of the guard electrode, at least at given stopping frequencies, in order to stop current from flowing from one zone to the other.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: December 12, 2017
    Assignee: CSEM CENTRE SUISSE D'ELECTRONIQUE ET DE MICROTECHNIQUE SA—RECHERCHE ET DÉVELOPPEMENT
    Inventor: Olivier Chételat
  • Publication number: 20160256066
    Abstract: Body electrode system including a set of standalone electrodes units for measuring physiological signals of a body part and/or electrically stimulate a body part. A connecting garment provides electrical connection between each standalone unit of the set. Each unit of the set is individually positionable at a specific chosen position onto the body to be sensed and/or stimulated. The garment is electrically connectable to said units, preferably after placement of said set onto the body.
    Type: Application
    Filed: October 21, 2013
    Publication date: September 8, 2016
    Inventors: Olivier Chetelat, Damien Ferrario, Thomas Parkel, David Hasler
  • Publication number: 20150173677
    Abstract: Measurement device for measuring a bio-impedance and/or a bio-potential of a human or animal body and adapted to be worn on the body, including: at least two electrode sensors. Each of the at least two electrode sensors includes a first electrical contact configured to be in electrical contact with the skin of the body when the system is worn, and a second electrical contact. A single electrical connector electrically connects the at least two electrode sensors with each other via the second electrical contact. An active device is configured to cooperate with a subset of the at least two electrode sensors such that the potential of the electrical connector is substantially equal to a projected potential determined from the potential of the first electrical contact of each electrode sensor of the subset when the measurement device is worn.
    Type: Application
    Filed: December 19, 2014
    Publication date: June 25, 2015
    Inventors: Olivier Chetelat, Marc Correvon
  • Publication number: 20140128765
    Abstract: Method for bio impedance measurement on a skin surface of a living body, using a bio impedance measurement device comprising a sensing electrode and a pilot electrode, comprising the following steps: placing said sensing electrode and pilot electrode on the surface of said body; providing a guard electrode adapted to separate the surface in at least two zones, among which a sensing zone including the sensing electrode and a current injection zone including the pilot electrode; providing a controller, electrically connected to said electrodes, adapted to control the current source; controlling the potential of said guard electrode, at least at given stopping frequencies, in order to stop current from flowing from one zone to the other.
    Type: Application
    Filed: November 5, 2013
    Publication date: May 8, 2014
    Inventor: Olivier Chételat
  • Patent number: 8427181
    Abstract: A follower amplifier with power supply biased by a controlled voltage source such that the power supply potentials are, for the frequencies of interest, as close as possible to the potential of the follower output. There is proposed a front-end electronic circuit for biopotential and impedance measurements with outstanding performances (very high input impedance and gain very close to unity). Preferably, the explicit guard electrode and the explicit electronic unit at the belt are no longer necessary; all electronics is embedded in units placed directly at the measurement sites. Moreover, the proposed front-end electronic circuit allows a drastic simplification of the cabling and connectors since all units are connected to only one wire (the theoretical minimum) for potential reference and current return. Preferably, this wire does not even require an electrical isolation and can be easily embedded in the textile of a shirt, in a garment, mesh, belt, etc.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: April 23, 2013
    Assignee: CSEM Centre Suisse d' Electronique et de Microtechnique SA—Recherche et Developpement
    Inventors: Olivier Chetelat, Josep Sola I Caros
  • Patent number: 8164294
    Abstract: In general, one aspect of the subject matter described in this specification features a torquer apparatus that includes a rotor with magnetic poles such that, when radially projected on a concentric octahedron, the same symmetrical pattern is obtained on all faces of the octahedron, the polarity of the poles projected on two adjacent faces of the octahedron being opposite. A stator with at least twenty poles magnetized with coils and such that, when radially projected on a concentric icosahedron, the same symmetrical pattern is obtained on all faces of the icosahedron, the stator being-in nominal position-concentric with the rotor. Real-time measurements, or equivalent information, of the position of the rotor with respect to the stator, and real-time measurements, or equivalent information, of exported torque from the stator, or of the orientation of the rotor with respect to the stator can be obtained.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: April 24, 2012
    Inventor: Olivier Chételat
  • Patent number: 8161795
    Abstract: A physical gas sensor of thermal type capable of determining the concentrations of a gas mixture even in the presence of humidity by measuring the thermal diffusivity and conductivity includes a cell with thermal conductivity whose frequency response to the gases is known, in particular in respect of humidity, delivering a signal Vm representative of the concentration of the gas. This cell is excited by a pulsed signal so that a processing can be carried out at different analysis frequencies: at low frequency and at higher frequency. The output signals from the two processing chains are combined in the circuit (60) so as to provide the levels of concentration of the gas and the concentration of the water vapour. The signals obtained may also be re-combined together with components of the signal Vm of various passbands.
    Type: Grant
    Filed: February 8, 2008
    Date of Patent: April 24, 2012
    Assignee: Neroxis SA
    Inventors: Yves De Coulon, Olivier Chetelat, Marc Brodard, Emmanuel Onillon
  • Publication number: 20110001497
    Abstract: A follower amplifier with power supply biased by a controlled voltage source such that the power supply potentials are, for the frequencies of interest, as close as possible to the potential of the follower output. There is proposed a front-end electronic circuit for biopotential and impedance measurements with outstanding performances (very high input impedance and gain very close to unity). Preferably, the explicit guard electrode and the explicit electronic unit at the belt are no longer necessary; all electronics is embedded in units placed directly at the measurement sites. Moreover, the proposed front-end electronic circuit allows a drastic simplification of the cabling and connectors since all units are connected to only one wire (the theoretical minimum) for potential reference and current return. Preferably, this wire does not even require an electrical isolation and can be easily embedded in the textile of a shirt, in a garment, mesh, belt, etc.
    Type: Application
    Filed: March 10, 2009
    Publication date: January 6, 2011
    Inventors: Olivier CHETELAT, Josep SOLA I CAROS
  • Publication number: 20100116024
    Abstract: A physical gas sensor of thermal type capable of determining the concentrations of a gas mixture even in the presence of humidity by measuring the thermal diffusivity and conductivity includes a cell with thermal conductivity whose frequency response to the gases is known, in particular in respect of humidity, delivering a signal Vm representative of the concentration of the gas. This cell is excited by a pulsed signal so that a processing can be carried out at different analysis frequencies: at low frequency and at higher frequency. The output signals from the two processing chains are combined in the circuit (60) so as to provide the levels of concentration of the gas and the concentration of the water vapour. The signals obtained may also be re-combined together with components of the signal Vm of various passbands.
    Type: Application
    Filed: February 8, 2008
    Publication date: May 13, 2010
    Applicant: NEROXIS SA
    Inventors: Yves De Coulon, Olivier Chetelat, Marc Brodard, Emmanuel Onillon
  • Publication number: 20100007303
    Abstract: A torquer apparatus generally comprises a reaction-gyro sphere consisting of a concentric assembly of a substantially spherical rotor and a substantially spherical stator. This is implemented in the present invention as a rotor with magnetic poles such that, when radially projected on a concentric octahedron, the same symmetrical pattern is obtained on all faces of said octahedron, the polarity of the poles projected on two adjacent faces of said octahedron being opposite and a stator with at least twenty poles magnetized with coils and such that, when radially projected on a concentric icosahedron, the same symmetrical pattern is obtained on all faces of said icosahedron, said stator being-in nominal position-concentric with said rotor. Real-time measurements, or equivalent information, of the position of the rotor with respect to the stator are obtained together with exported torque from the stator, or the orientation of the rotor with respect to the stator.
    Type: Application
    Filed: March 28, 2007
    Publication date: January 14, 2010
    Inventor: Olivier Chételat
  • Publication number: 20080171926
    Abstract: The present invention concerns an optical based pulse oximetry device comprising: first, second and third light emitting means, for placement on the skin surface of a body part to inject light in a tissue of said part, the wavelengths of the light emitted by said second and third means being different from each other light detecting means located at a relatively short distance from said first light emitting means and at relatively long distance from said second light emitting means and said third light emitting means, for collecting at the skin surface light of said emitting means having travelled through said tissue, first computing means for denoising the output signals of said long distance light detecting means from the output signals of said short distance light detecting means, and second computing means for deriving oximetry measurements from the denoised output signals of said long distance light detecting means.
    Type: Application
    Filed: January 7, 2008
    Publication date: July 17, 2008
    Inventors: Josep SOLA I CAROS, Christophe Verjus, Jens Krauss, Olivier Chetelat, Victor Neuman