Patents by Inventor Wenyao Xu

Wenyao Xu 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: 10918312
    Abstract: This disclosure relates to systems and methods to analyze gait, balance or posture information extracted from data collected by one or more wearable and connected sensor devices with sensors embedded therewithin. The embedded sensors include a three-axis accelerometer, a three-axis gyroscope and an array of pressure sensors. Sensor data detected by the sensors can be received by a mobile computing device, which can analyze the sensor data to identify a pattern related to gait, balance or posture within the sensor data; and apply a statistical/machine learning-based classification to the pattern related to gait, balance or posture to assign a clinical parameter to the pattern characterizing a risk of a slip, trip and fall event.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: February 16, 2021
    Assignees: CASE WESTERN RESERVE UNIVERSITY, THE RESEARCH FOUNDATION FOR STATE UNIVERSITY OF NEW YORK
    Inventors: Ming-Chun Huang, Wenyao Xu
  • Publication number: 20200236545
    Abstract: Methods and systems are provided for authenticating an individual using a motion of a physiological structure. For example, an individual may be authenticated using their cardiac motion. A first radiofrequency (“RF”) signal is transmitted towards the physiological structure of the individual. A first RF return signal is received, where the first RF return signal corresponds to the transmitted first RF signal. The first RF signal and first RF return signal are processed to obtain a motion signal. One or more values are determined for each fiducial point of a set of pre-determined fiducial points in the motion signal. The set of pre-determined fiducial points corresponds to physical movements of the physiological structure. The individual is authenticated based on the values of one or more fiducial points.
    Type: Application
    Filed: September 16, 2019
    Publication date: July 23, 2020
    Inventors: Wenyao Xu, Changzhi Li
  • Publication number: 20180279915
    Abstract: This disclosure relates to systems and methods to analyze gait, balance or posture information extracted from data collected by one or more wearable and connected sensor devices with sensors embedded therewithin. The embedded sensors include a three-axis accelerometer, a three-axis gyroscope and an array of pressure sensors. Sensor data detected by the sensors can be received by a mobile computing device, which can analyze the sensor data to identify a pattern related to gait, balance or posture within the sensor data; and apply a statistical/machine learning-based classification to the pattern related to gait, balance or posture to as sign a clinical parameter to the pattern characterizing a risk of a slip, trip and fall event.
    Type: Application
    Filed: September 28, 2016
    Publication date: October 4, 2018
    Inventors: Ming-Chun Huang, Wenyao Xu
  • Publication number: 20160135744
    Abstract: A fabric-based pressure sensor array includes: (1) a first layer including M elongated conductive strips coated thereon; (2) a second layer including N elongated conductive strips coated thereon, the M elongated conductive strips extending crosswise relative to the N elongated conductive strips to define M×N intersections; and (3) a unitary textile sheet extending between the first layer and the second layer so as to overlap the M×N intersections, the textile sheet having a variable resistivity in response to applied pressure so as to define M×N pressure sensors at locations corresponding to the M×N intersections.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 19, 2016
    Inventors: Majid Sarrafzadeh, Wenyao Xu, Ming-Chun Huang, Nitin Raut, Behrooz Yadegar
  • Patent number: 9330342
    Abstract: A system includes a pressure sensitive material that provides an indication of applied pressure for multiple locations on the material, and an analysis device in communication with the pressure sensitive material. The analysis device receives the indication of applied pressure, determines, for each of multiple measurement periods, a pressure image from the indication of applied pressure such that a sequence of pressure images is determined, and constructs a manifold representing the sequence of pressure images.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: May 3, 2016
    Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
    Inventors: Majid Sarrafzadeh, Wenyao Xu, Ming-Chun Huang, Jason J. Liu
  • Patent number: 9271665
    Abstract: A fabric-based pressure sensor array includes: (1) a first layer including M elongated conductive strips coated thereon; (2) a second layer including N elongated conductive strips coated thereon, the M elongated conductive strips extending crosswise relative to the N elongated conductive strips to define M×N intersections; and (3) a unitary textile sheet extending between the first layer and the second layer so as to overlap the M×N intersections, the textile sheet having a variable resistivity in response to applied pressure so as to define M×N pressure sensors at locations corresponding to the M×N intersections.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: March 1, 2016
    Assignees: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, MEDISENS WIRELESS, INC.
    Inventors: Majid Sarrafzadeh, Wenyao Xu, Ming-Chun Huang, Nitin Raut, Behrooz Yadegar
  • Patent number: 8823526
    Abstract: A method for determining the motive instability of an individual using foot pressure, foot speed and foot direction data collected from sensors on shoes. The sensed data is used to determine the minimum number and the placement of pressure sensors in the shoe. The data from the sensors is processed to extract spatial and temporal parameters as desired. The data is grouped into segments based on a segmentation rule. The trend in each segment is determined. The variability of the trend in each segment is determined. The risk of fall is computed on the basis of the trend and variance. The computation is adjustable by emphasizing certain parameters in order to tailor the instability assessment to a specific individual.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: September 2, 2014
    Assignee: The Regents of the University of California
    Inventors: William J. Kaiser, Majid Sarrafzadeh, Hyduke Noshadi, Shaun S. Ahmadian, Hagop Hagopian, Navid Amini, Mars Lan, Jonathan S. Woodbridge, Wenyao Xu
  • Publication number: 20140157911
    Abstract: A system includes a pressure sensitive material that provides an indication of applied pressure for multiple locations on the material, and an analysis device in communication with the pressure sensitive material. The analysis device receives the indication of applied pressure, determines, for each of multiple measurement periods, a pressure image from the indication of applied pressure such that a sequence of pressure images is determined, and constructs a manifold representing the sequence of pressure images.
    Type: Application
    Filed: December 10, 2013
    Publication date: June 12, 2014
    Inventors: Majid Sarrafzadeh, Wenyao Xu, Ming-Chun Huang, Jason J. Liu
  • Publication number: 20120323501
    Abstract: A fabric-based pressure sensor array includes: (1) a first layer including M elongated conductive strips coated thereon; (2) a second layer including N elongated conductive strips coated thereon, the M elongated conductive strips extending crosswise relative to the N elongated conductive strips to define M×N intersections; and (3) a unitary textile sheet extending between the first layer and the second layer so as to overlap the M×N intersections, the textile sheet having a variable resistivity in response to applied pressure so as to define M×N pressure sensors at locations corresponding to the M×N intersections.
    Type: Application
    Filed: May 18, 2012
    Publication date: December 20, 2012
    Inventors: Majid Sarrafzadeh, Wenyao Xu, Ming-Chun Huang, Nitin Raut, Behrooz Yadegar
  • Publication number: 20120092169
    Abstract: A method for determining the motive instability of an individual using foot pressure, foot speed and foot direction data collected from sensors on shoes. The sensed data is used to determine the minimum number and the placement of pressure sensors in the shoe. The data from the sensors is processed to extract spatial and temporal parameters as desired. The data is grouped into segments based on a segmentation rule. The trend in each segment is determined. The variability of the trend in each segment is determined. The risk of fall is computed on the basis of the trend and variance. The computation is adjustable by emphasizing certain parameters in order to tailor the instability assessment to a specific individual.
    Type: Application
    Filed: June 29, 2010
    Publication date: April 19, 2012
    Applicant: The Regents of the University of California
    Inventors: William J. Kaiser, Majid Sarrafzadeh, Hyduke Noshadi, Shaun S. Ahmadian, Hagop Hagopian, Navid Amini, Mars Lan, Jonathan S. Woodbridge, Wenyao Xu
  • Patent number: 6345094
    Abstract: An inbound/outbound call record processing system and method processes outbound call records for use with inbound telephone calls. The call record processing system includes a call record finder that finds outbound call records that match an inbound telephone call, for example, by searching a call record index table including a plurality of indexed call records corresponding to a plurality of outbound call records in one or more outbound call lists. One way of finding matching outbound call records is by receiving and automatically identifying a telephone number associated with the inbound telephone call and searching for an indexed call record having a searchable key field that matches the telephone number. If no records are found by searching for the telephone number, a search can be made based upon requested information provided by the calling party.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: February 5, 2002
    Assignee: Davox Corporation
    Inventors: Saima Khan, Wenyao Xu