Patents by Inventor David Antoine Christian Marie Roovers

David Antoine Christian Marie Roovers 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: 10617308
    Abstract: The present invention relates to a portable device for determining a heart rate of a person, said portable device comprising: a heart rate measurement unit for measuring the heart rate of the person over time to generate a heart rate signal, a motion measurement unit for measuring the motion of a body part of the person over time to generate a motion signal, and a processing unit which is adapted to measure a signal quality of the heart rate signal, to calculate the heart rate based on the heart rate signal if said signal quality is above a predefined threshold, and to estimate the heart rate based on the motion signal if said signal quality is below said threshold.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: April 14, 2020
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Cristian Nicolae Presura, David Antoine Christian Marie Roovers
  • Publication number: 20190357851
    Abstract: A data processing device (100, 200) is disclosed for extracting a desired vital signal containing a physiological information component from sensor data that includes time-dependent first sensor data (PPG1) comprising the physiological information component and at least one motion artifact component, and that includes time-dependent second sensor data that is indicative of a position, a velocity or an acceleration of the sensed region as a function of time. A decomposition unit (104, 204) decomposes the second sensor data into at least two components of decomposed sensor data and, based on the decomposed second sensor data, provides at least two different sets of motion reference data in at least two different motion reference data channels. An artifact removal unit (106, 206) determines the vital signal formed from a linear combination of the first sensor data and the motion reference data of at least one two of the motion reference data channels.
    Type: Application
    Filed: August 6, 2019
    Publication date: November 28, 2019
    Inventors: Cornelus Hendricus Bertus Arnoldus van Dinther, Gerard de Haan, David Antoine Christian Marie Roovers
  • Publication number: 20190290146
    Abstract: An optical vital signs sensor is provided which comprises a PPG sensor (100), a pre-processing unit (130) which adapts the sampling rate or the number of pulses per sample, a processing unit (140) which executes at least one processing algorithm based on an output signal of the pre-processing unit and a sensor control unit (150). The sensor control unit is configured to control the PPG sensor by adapting the sampling rate and/or the number of pulses per sample.
    Type: Application
    Filed: September 29, 2017
    Publication date: September 26, 2019
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Alphonsus Tarcisius Jozef Maria SCHIPPER, Paulus Henricus Antonius DILLEN, David Antoine Christian Marie ROOVERS
  • Patent number: 10405760
    Abstract: A heart rate monitor system having at least one primary heart rate sensor (110) for measuring or determining a heart rate of a user and for outputting an output signal (HR) is provided. The output signal (HR) is based at least on measured heart beats and/or artifacts. The heart rate monitor system also comprises a model unit (132) for estimating or predicting a heart rate (HRM) of a user based on a model stored in the model unit (132) and the information received from at least one secondary sensor (120) measuring at least one physiological factor influencing heart rate of a user. The heart rate monitor system furthermore comprises a processing unit (131) for correlating the output signal (HR) received from the primary sensor (110) with the estimated or predicted hear rate (HRM) received from the model unit (132) to differentiate the measured heart beats from the artifacts.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: September 10, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Cristian Nicolae Presura, David Antoine Christian Marie Roovers, Ruxandra Valentina Bobiti
  • Patent number: 10398383
    Abstract: A data processing device is disclosed for extracting a desired vital signal containing a physiological information component from sensor data that includes time-dependent first sensor data comprising the physiological information component and at least one motion artifact component, and that includes time-dependent second sensor data that is indicative of a position, a velocity or an acceleration of the sensed region as a function of time. A decomposition unit decomposes the second sensor data into at least two components of decomposed sensor data and, based on the decomposed second sensor data, provides at least two different sets of motion reference data in at least two different motion reference data channels. An artifact removal unit determines the vital signal formed from a linear combination of the first sensor data and the motion reference data of at least one two of the motion reference data channels.
    Type: Grant
    Filed: November 25, 2016
    Date of Patent: September 3, 2019
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Cornelus Hendricus Bertus Arnoldus van Dinther, Gerard de Haan, David Antoine Christian Marie Roovers
  • Publication number: 20190159688
    Abstract: The present invention relates to a device (10) for determining an arterial compliance of a subject (12). The device (10) comprises an inflatable cuff (14), a pressure sensor (18) which is configured to sense a pressure signal (52) that is indicative of a pressure within the cuff (14), a second sensor (20) which is at least partly integrated in the cuff (14) and configured to sense a second signal (56) that is responsive to expansions and contractions of the cuff (14) caused by a pulsating blood flow in an artery (50) of the subject (12), and a processing unit (22). The processing unit is configured to determine based on said part of the pressure signal (52) a pulse pressure of the subject (12), to determine based on said part of the second signal (56) an arterial volume change of the artery (50) of the subject (12) during at least one cardiac cycle, and to determine the arterial compliance of the subject (12) based on pulse pressure and the arterial volume change.
    Type: Application
    Filed: June 14, 2017
    Publication date: May 30, 2019
    Inventors: KOEN THEO JOHAN DE GROOT, TON HERMANUS MARIA AKKERMANS, CORNELUS HENDRICUS BERTUS ARNOLDUS VAN DINTHER, STEFAN PFUNDTNER, DAVID ANTOINE CHRISTIAN MARIE ROOVERS, ALPHONSUS TARCISIUS JOZEF MARIA SCHIPPER, CORNELIS HARM TAAL
  • Patent number: 10034639
    Abstract: An optical vital signs sensor is provided which comprises at least one light source with a primary and a secondary light unit and a photo detector, a motion sensor configured to detect a motion of a user, a periodicity metric unit to analyze an output signal of the at least one motion sensor to detect a periodicity in its output signal and a control unit configured to control an operation of the at least one primary and secondary light unit and to activate the at least one secondary light unit in addition to the at least one primary light unit when the periodicity metric unit does not detect a periodicity in the output signal of the motion sensor.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: July 31, 2018
    Assignee: Koninklijke Philips N.V.
    Inventors: Cornelus Hendricus Bertus Arnoldus van Dinther, David Antoine Christian Marie Roovers
  • Patent number: 9980655
    Abstract: A heart rate monitor system (100) for monitoring a heart rate of a user is provided. The heart rate monitor system (100) comprises at least one primary heart rate sensor (110) for measuring or determining a heart rate of a user. The at least one primary heart rate sensor (110) has a first power consumption. The heart rate monitor system (100) also comprises at least one secondary sensor (120) for measuring at least one physiological factor influencing the heart rate of a user. The at least one secondary sensor (120) has a second power consumption which is lower than the first power consumption of the at least one primary heart rate sensor (110). The heart rate monitor system (100) further comprises a power management unit (160) for managing an operation and/or power consumption of the at least one primary heart rate sensor (110) based on information (126) from the at least one secondary sensor (120).
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: May 29, 2018
    Assignee: Koninklijke Philips N.V.
    Inventors: Cristian Nicolae Presura, David Antoine Christian Marie Roovers, Ruxandra Valentina Bobiti
  • Patent number: 9936912
    Abstract: The present invention relates to a device (100) for measuring a cycling cadence, a method (500) of operating a device (100) for measuring a cycling cadence, and a cycling cadence computer program. The device (100) comprises a motion sensor (such as, e.g., an accelerometer) for detecting a movement of the device (100) and for generating a motion signal (x, y, z) corresponding to the movement; a cadence determination unit (300) for determining cycling cadence based on the motion signal (x, y, z). The device (100) can be worn on the cyclist's wrist or arm (110). The motion sensor in the device is able to pick up the tiny movements of the arm or wrist that correspond to the cadence. Optionally, an algorithm is applied that can derive the cadence from a noisy signal.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: April 10, 2018
    Assignee: Koninklijke Philips N.V.
    Inventors: David Antoine Christian Marie Roovers, Laurentia Johanna Huijbregts, Alphonsus Tarcisius Jozef Maria Schipper, Felipe Maia Masculo
  • Publication number: 20180028075
    Abstract: The present invention relates to a portable device for determining a heart rate of a person, said portable device comprising: a heart rate measurement unit for measuring the heart rate of the person over time to generate a heart rate signal, a motion measurement unit for measuring the motion of a body part of the person over time to generate a motion signal, and a processing unit which is adapted to measure a signal quality of the heart rate signal, to calculate the heart rate based on the heart rate signal if said signal quality is above a predefined threshold, and to estimate the heart rate based on the motion signal if said signal quality is below said threshold.
    Type: Application
    Filed: August 16, 2017
    Publication date: February 1, 2018
    Inventors: CRISTIAN NICOLAE PRESURA, DAVID ANTOINE CHRISTIAN MARIE ROOVERS
  • Patent number: 9770176
    Abstract: The present invention relates to a portable device (10) for determining a heart rate of a person (20), comprising a heart rate measurement unit, a motion measurement unit for measuring the motion of a body part (12), and a processing unit. The processing unit is adapted to measure a signal quality of the heart rate signal and accordingly switch between two calculation modes: If the signal quality is above a predefined threshold, the heart rate is calculated based on the heart rate signal. If the signal quality is so poor that a reliable calculation of the heart rate is technically not possible anymore based on the heart rate signal, the processing unit switches to its second calculation mode, in which the heart rate is estimated based on the motion signal by estimating a heart rate constant, which depends on the frequency of the motion signal, and defining an exponential development of the heart rate, starting at the last reliably measured heart rate and finishing at the estimated heart rate constant.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: September 26, 2017
    Assignee: KONINKLIJKE PHILIPS N.V.
    Inventors: Cristian Nicolae Presura, David Antoine Christian Marie Roovers
  • Publication number: 20170258338
    Abstract: A heart rate monitor system (100) for monitoring a heart rate of a user is provided. The heart rate monitor system (100) comprises at least one primary heart rate sensor (110) for measuring or determining a heart rate of a user. The at least one primary heart rate sensor (110) has a first power consumption. The heart rate monitor system (100) also comprises at least one secondary sensor (120) for measuring at least one physiological factor influencing the heart rate of a user. The at least one secondary sensor (120) has a second power consumption which is lower than the first power consumption of the at least one primary heart rate sensor (110). The heart rate monitor system (100) further comprises a power management unit (160) for managing an operation and/or power consumption of the at least one primary heart rate sensor (110) based on information (126) from the at least one secondary sensor (120).
    Type: Application
    Filed: March 9, 2015
    Publication date: September 14, 2017
    Inventors: Cristian Nicolae Presura, David Antoine Christian Marie Roovers, Ruxandra Valentina Bobiti
  • Publication number: 20170215747
    Abstract: An optical vital signs sensor embodied as a PPG sensor is provided. The optical vital signs sensor comprises a light source to generate light at at least two wavelengths, a photo detector unit configured to detect the light of the at least two wavelengths, a contact surface to be placed against a skin of the user and an off-skin detection unit configured to detect whether the contact surface is in contact with the skin of the user based on output signals of the photo detector at the at least two wavelengths.
    Type: Application
    Filed: January 20, 2017
    Publication date: August 3, 2017
    Inventors: Cornelus Hendricus Bertus Arnoldus van Dinther, David Antoine Christian Marie Roovers
  • Publication number: 20170071489
    Abstract: A heart rate monitor system having at least one primary heart rate sensor (110) for measuring or determining a heart rate of a user and for outputting an output signal (HR) is provided. The output signal (HR) is based at least on measured heart beats and/or artifacts. The heart rate monitor system also comprises a model unit (132) for estimating or predicting a heart rate (HRM) of a user based on a model stored in the model unit (132) and the information received from at least one secondary sensor (120) measuring at least one physiological factor influencing heart rate of a user. The heart rate monitor system furthermore comprises a processing unit (131) for correlating the output signal (HR) received from the primary sensor (110) with the estimated or predicted hear rate (HRM) received from the model unit (132) to differentiate the measured heart beats from the artifacts.
    Type: Application
    Filed: February 27, 2015
    Publication date: March 16, 2017
    Inventors: Cristian Nicolae Presura, David Antoine Christian Marie Roovers, Ruxandra Valentina Bobiti
  • Publication number: 20170071547
    Abstract: A data processing device is disclosed for extracting a desired vital signal containing a physiological information component from sensor data that includes time-dependent first sensor data comprising the physiological information component and at least one motion artifact component, and that includes time-dependent second sensor data that is indicative of a position, a velocity or an acceleration of the sensed region as a function of time. A decomposition unit decomposes the second sensor data into at least two components of decomposed sensor data and, based on the decomposed second sensor data, provides at least two different sets of motion reference data in at least two different motion reference data channels. An artifact removal unit determines the vital signal formed from a linear combination of the first sensor data and the motion reference data of at least one two of the motion reference data channels.
    Type: Application
    Filed: November 25, 2016
    Publication date: March 16, 2017
    Inventors: Cornelus Hendricus Bertus Arnoldus van Dinther, Gerard de Haan, David Antoine Christian Marie Roovers
  • Publication number: 20170035362
    Abstract: An optical vital signs sensor is provided which comprises at least one light source with a primary and a secondary light unit and a photo detector, a motion sensor configured to detect a motion of a user, a periodicity metric unit to analyze an output signal of the at least one motion sensor to detect a periodicity in its output signal and a control unit configured to control an operation of the at least one primary and secondary light unit and to activate the at least one secondary light unit in addition to the at least one primary light unit when the periodicity metric unit does not detect a periodicity in the output signal of the motion sensor.
    Type: Application
    Filed: October 19, 2016
    Publication date: February 9, 2017
    Inventors: Cornelus Hendricus Bertus Arnoldus van Dinther, David Antoine Christian Marie Roovers
  • Publication number: 20170007166
    Abstract: The present invention relates to a device (100) for measuring a cycling cadence, a method (500) of operating a device (100) for measuring a cycling cadence, and a cycling cadence computer program. The device (100) comprises a motion sensor (such as, e.g., an accelerometer) for detecting a movement of the device (100) and for generating a motion signal (x, y, z) corresponding to the movement; a cadence determination unit (300) for determining cycling cadence based on the motion signal (x, y, z). The device (100) can be worn on the cyclist's wrist or arm (110). The motion sensor in the device is able to pick up the tiny movements of the arm or wrist that correspond to the cadence. Optionally, an algorithm is applied that can derive the cadence from a noisy signal.
    Type: Application
    Filed: February 17, 2015
    Publication date: January 12, 2017
    Inventors: David Antoine Christian Marie ROOVERS, Laurentia Johanna HUIJBREGTS, Alphonsus Tarcisius Jozef Maria SCHIPPER, Felipe Maia MASCULO
  • Publication number: 20140213858
    Abstract: The present invention relates to a portable device (10) for determining a heart rate of a person (20), comprising a heart rate measurement unit, a motion measurement unit for measuring the motion of a body part (12), and a processing unit. The processing unit is adapted to measure a signal quality of the heart rate signal and accordingly switch between two calculation modes: If the signal quality is above a predefined threshold, the heart rate is calculated based on the heart rate signal. If the signal quality is so poor that a reliable calculation of the heart rate is technically not possible anymore based on the heart rate signal, the processing unit switches to its second calculation mode, in which the heart rate is estimated based on the motion signal by estimating a heart rate constant, which depends on the frequency of the motion signal, and defining an exponential development of the heart rate, starting at the last reliably measured heart rate and finishing at the estimated heart rate constant.
    Type: Application
    Filed: September 4, 2012
    Publication date: July 31, 2014
    Applicant: KONINKLIJKE PHILIPS N.V.
    Inventors: Cristian Nicolae Presura, David Antoine Christian Marie Roovers
  • Patent number: 8498423
    Abstract: A method is provided which is suitable to cope with non-linear echo paths during acoustic echo cancellation in speakerphones. Non-linear paths occur particularly in hands-free operation of, e.g., a mobile phone, due to driving the amplifier and loudspeaker in the non-linear range. The idea is to combine the commonly known one microphone approach of linear acoustic echo cancellation using an adaptive filter and a post-processor together with a multiple microphone approach using beam forming which separately removes the non-linear part of the echo.
    Type: Grant
    Filed: June 16, 2008
    Date of Patent: July 30, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Rainer Thaden, Cornelis Pieter Janse, David Antoine Christian Marie Roovers
  • Patent number: 8472655
    Abstract: An audio processing arrangement (200) comprises a plurality of audio sources (101, 102) generating input audio signals, a processing circuit (110) for deriving processed audio signals from the input audio signals, a combining circuit (120) for deriving a combined audio signal from the processed audio signals, and a control circuit (130) for controlling the processing circuit in order to maximize a power measure of the combined audio signal and for limiting a function of gains of the processed audio signals to a predetermined value. In accordance with the present invention, the audio processing arrangement (200) comprises a pre-processing circuit (140) for deriving pre-processed audio signals from the input audio signals to minimize a cross-correlation of interferences comprised in the input audio signals. The pre-processed signals are provided to the processing circuit (110) instead of the input audio signals.
    Type: Grant
    Filed: June 17, 2009
    Date of Patent: June 25, 2013
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Sriram Srinivasan, David Antoine Christian Marie Roovers, Cornelis Pieter Janse