Patents by Inventor Shufeng Han

Shufeng Han 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).

  • Publication number: 20180373256
    Abstract: An automatic turning control system for a work vehicle having a ground engaging traction device directed by a manual steering device. The automatic turning control system includes an electronic control unit (ECU), a traction device angle sensor configured to generate an angle signal representative of an angle of the traction device with respect to an axis of the work vehicle, and a vehicle guidance system. The ECU is configured to generate a manual path signal representing an actual path of the work vehicle based on the angle signal. The ECU is operatively connected to a vehicle guidance system and determines a learned path signal based on the manual path signal. The vehicle guidance system automatically directs the work vehicle along the learned path signal when the vehicle moves from a working area, to a non-working area, and back to the working area of a field.
    Type: Application
    Filed: June 27, 2017
    Publication date: December 27, 2018
    Inventors: Jeffrey E. Runde, Qiang R. Liu, Shufeng Han
  • Patent number: 9880560
    Abstract: An automatic control system moves a vehicle so that it can be coupled to an implement. The vehicle has propulsion and steering controls which respond to electronic input signals. A visual target is mounted on the implement. Vehicle mounted cameras generate images of the target. A motion control unit receives and processes the images, and generates vehicle movement commands as a function of the images which are communicated to the propulsion and steering controls. The motion control unit includes a perception engine connected to the cameras, a controller connected to the perception engine, and a vehicle/operator interface which is connected to the controller, and to the propulsion and steering controls. The perception engine captures images from the cameras, un-distorts the images, and searches for the target. If the target is found, the perception engine recovers vehicle posture information and transmits said information to the controller.
    Type: Grant
    Filed: September 16, 2013
    Date of Patent: January 30, 2018
    Assignee: DEERE & COMPANY
    Inventors: Shufeng Han, Christopher D. Turner, Bryan K. Buerkle, Steven A. Duppong
  • Patent number: 9615501
    Abstract: A system for controlling the position of an agricultural implement coupled to an agricultural vehicle comprises a control unit connected to a field topography database containing three-dimensional data of the topography of a field, a location signal generation arrangement providing location data of the position of the vehicle and/or the implement in the field, an implement position sensor arranged to sense the position of the implement with respect to the ground and to a positioning arrangement configured to move the implement in response to position control signals from the control unit. The control unit is operable to provide the control signals based upon a combination of actual position data received from the implement position sensor and expected required position change data that are derived from elevation data recalled from the field topography database based upon the location data.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: April 11, 2017
    Assignee: DEERE & COMPANY
    Inventors: Terence Daniel Pickett, Shufeng Han
  • Publication number: 20150077557
    Abstract: An automatic control system moves a vehicle so that it can be coupled to an implement. The vehicle has propulsion and steering controls which respond to electronic input signals. A visual target is mounted on the implement. Vehicle mounted cameras generate images of the target. A motion control unit receives and processes the images, and generates vehicle movement commands as a function of the images which are communicated to the propulsion and steering controls. The motion control unit includes a perception engine connected to the cameras, a controller connected to the perception engine, and a vehicle/operator interface which is connected to the controller, and to the propulsion and steering controls. The perception engine captures images from the cameras, un-distorts the images, and searches for the target. If the target is found, the perception engine recovers vehicle posture information and transmits said information to the controller.
    Type: Application
    Filed: September 16, 2013
    Publication date: March 19, 2015
    Applicant: DEERE & COMPANY
    Inventors: SHUFENG HAN, Christopher D. Turner, Bryan K. Buerkle, Steven A. Duppong
  • Patent number: 8433483
    Abstract: A discriminator identifies windrow pixels associated with a windrow within a collected image. A definer defines a search space with respect to a vehicle. An evaluator determines respective spatial correlations between the defined search space and the windrow pixels for different angular displacements of the search space. An alignment detector or search engine determining a desired vehicular heading as a preferential angular displacement associated with a generally maximum spatial correlation between the defined search space and the windrow pixels. An offset calculator estimates an offset of the vehicle to a central point of the windrow or a depth axis to achieve the desired vehicle heading and desired position of the vehicle with respect to the windrow.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: April 30, 2013
    Assignee: Deere & Company
    Inventors: Shufeng Han, Jiantao Wei, Francisco Rovira-Mas
  • Patent number: 8185275
    Abstract: A discriminator identifies windrow pixels associated with a windrow within a collected image. A definer defines a search space with respect to a vehicle. An evaluator determines respective spatial correlations between the defined search space and the windrow pixels for different angular displacements of the search space. An alignment detector or search engine determining a desired vehicular heading as a preferential angular displacement associated with a generally maximum spatial correlation between the defined search space and the windrow pixels. An offset calculator estimates an offset of the vehicle to a central point of the windrow or a depth axis to achieve the desired vehicle heading and desired position of the vehicle with respect to the windrow.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: May 22, 2012
    Assignee: Deere & Company
    Inventors: Shufeng Han, Jiantao Wei, Francisco Rovira-Mas
  • Publication number: 20120101695
    Abstract: A discriminator identifies windrow pixels associated with a windrow within a collected image. A definer defines a search space with respect to a vehicle. An evaluator determines respective spatial correlations between the defined search space and the windrow pixels for different angular displacements of the search space. An alignment detector or search engine determining a desired vehicular heading as a preferential angular displacement associated with a generally maximum spatial correlation between the defined search space and the windrow pixels. An offset calculator estimates an offset of the vehicle to a central point of the windrow or a depth axis to achieve the desired vehicle heading and desired position of the vehicle with respect to the windrow.
    Type: Application
    Filed: January 4, 2012
    Publication date: April 26, 2012
    Inventors: Shufeng Han, Jiantao Wei, Francisco Rovira-Mas
  • Patent number: 8150574
    Abstract: Preliminary guidance data is determined for the vehicle during an evaluation time window. A vision module collects vision data from a vision module during the evaluation time window. Vision guidance data is determined from the collected vision data. A vision quality estimator estimates vision quality data for at least one of the vision data and the vision guidance data during the evaluation time window. The vision quality data is based on a regression path and density grid points. An adjuster adjusts the preliminary guidance data to a revised guidance data based on the vision guidance data such that the revised guidance data is registered with or generally coextensive with the vision guidance data, if the vision quality data exceeds a minimum threshold.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: April 3, 2012
    Assignee: Deere & Company
    Inventors: Shufeng Han, Terence Daniel Pickett, John Franklin Reid
  • Patent number: 7876927
    Abstract: A preliminary guidance data is determined for the vehicle during an evaluation time window. A vision module collects vision data from a vision module during the evaluation time window. Vision guidance data is determined from the collected vision data. A vision quality estimator estimates vision quality data for at least one of the vision data and the vision guidance data during the evaluation time window. The vision quality data is based on a cross correlations and an r-squared value. An adjuster adjusts the preliminary guidance data to a revised guidance data based on the vision guidance data such that the revised guidance data is registered with or generally coextensive with the vision guidance data, if the vision quality data exceeds a minimum threshold.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: January 25, 2011
    Assignee: Deere & Company
    Inventors: Shufeng Han, Terence Daniel Pickett, John Franklin Reid
  • Patent number: 7844380
    Abstract: A system and method of guiding a vehicle comprises establishing elevation data and corresponding location data for a work area. A particular location of a vehicle within the work area is determined. Roll data and pitch data are estimated corresponding to the particular location. The vehicle is guided based upon the estimated roll data and the pitch data such that the vehicle follows a desired path.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: November 30, 2010
    Assignee: Deere & Company
    Inventors: Shufeng Han, John Franklin Reid, Terence Daniel Pickett
  • Patent number: 7792622
    Abstract: The method and system for vehicular guidance comprises an imaging device for collecting color image data to facilitate distinguishing crop image data (e.g., crop rows) from background data. A definer defines a series of scan line segments generally perpendicular to a transverse axis of the vehicle or of the imaging device. An intensity evaluator determines scan line intensity data for each of the scan line segments. An alignment detector (e.g., search engine) identifies a preferential heading of the vehicle that is generally aligned with respect to a crop feature, associated with the crop image data, based on the determined scan line intensity meeting or exceeding a maximum value or minimum threshold value.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: September 7, 2010
    Assignees: Deere & Company, Kansas State University Research Foundation
    Inventors: Jiantao Wei, Shufeng Han
  • Patent number: 7792607
    Abstract: A method and system for guiding a vehicle comprises a location determining receiver for collecting location data for the vehicle. A vision module collects vision data for the vehicle. A location quality estimator estimates the location quality data for the location data during an evaluation time window. A vision module estimates vision quality data for the vision data during the evaluation time window. A supervisor module selects a mixing ratio for the vision data and location data (or error signals associated therewith) based on the quality data.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: September 7, 2010
    Assignee: Deere & Company
    Inventors: Shufeng Han, John Franklin Reid, Francisco Rovira-Más
  • Patent number: 7684916
    Abstract: An imaging device collects color image data to facilitate distinguishing crop image data from background data. A definer defines a series of scan line segments generally perpendicular to a transverse axis of the vehicle or of the imaging device. An intensity evaluator determines scan line intensity data for each of the scan line segments. An alignment detector identifies a preferential heading of the vehicle that is generally aligned with respect to a crop feature, associated with the crop image data, based on the determined scan line intensity meeting or exceeding a maximum value or minimum threshold value. A reliability estimator estimates a reliability of the vehicle heading based on compliance with an intensity level criteria associated with one or more crop rows.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: March 23, 2010
    Assignees: Deere & Company, Kansas State University Research Foundation
    Inventors: Jiantao Wei, Shufeng Han
  • Publication number: 20090292412
    Abstract: A system and method of guiding a vehicle comprises establishing elevation data and corresponding location data for a work area. A particular location of a vehicle within the work area is determined. Roll data and pitch data are estimated corresponding to the particular location. The vehicle is guided based upon the estimated roll data and the pitch data such that the vehicle follows a desired path.
    Type: Application
    Filed: August 17, 2009
    Publication date: November 26, 2009
    Inventors: Shufeng Han, John Franklin Reid, Terence Daniel Pickett
  • Patent number: 7610123
    Abstract: A method and system for guiding a vehicle comprises a location determining receiver for collecting location data for the vehicle. A vision module collects vision data for the vehicle. A location quality estimator estimates the location quality data for the location data during an evaluation time window. A vision module estimates vision quality data for the vision data during the evaluation time window. A supervisor module selects at least one of a location data weight and a vision data weight based on the quality data.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: October 27, 2009
    Assignee: Deere & Company
    Inventors: Shufeng Han, John Franklin Reid, Francisco Rovira-Más
  • Patent number: 7593798
    Abstract: A system and method of guiding a vehicle comprises establishing elevation data and corresponding location data for a work area. A particular location of a vehicle within the work area is determined. Roll data and pitch data are estimated corresponding to the particular location. The vehicle is guided based upon the estimated roll data and the pitch data such that the vehicle follows a desired path.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: September 22, 2009
    Assignee: Deere & Company
    Inventors: Shufeng Han, John Franklin Reid, Terence Daniel Pickett
  • Patent number: 7580549
    Abstract: The method and system for vehicular guidance comprises an imaging device for collecting color image data. A definer defines a series of scan line segments generally perpendicular to a transverse axis of the vehicle or of the imaging device. An image parameter evaluator determines scan line image parameter data for each of the scan line segments. An alignment detector (e.g., search engine) identifies a preferential heading of the vehicle that is generally aligned with respect to a crop feature, associated with the image data, based on the determined scan line image parameter meeting or exceeding a maximum value or minimum threshold value.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: August 25, 2009
    Assignees: Deere & Company, Kansas State University Research Foundation
    Inventors: Jiantao Wei, Shufeng Han
  • Patent number: 7570783
    Abstract: The method and system for vehicular guidance comprises an imaging device for collecting color image data to facilitate distinguishing crop image data (e.g., crop rows) from background data. A definer defines a series of scan line segments generally perpendicular to a transverse axis of the vehicle or of the imaging device. An image parameter evaluator determines scan line image parameter data for each of the scan line segments. An alignment detector (e.g., search engine) identifies a preferential heading of the vehicle that is generally aligned with respect to a crop feature, associated with the crop image data, based on the determined scan line image parameter meeting or exceeding a maximum value or minimum threshold value. A reliability estimator estimates a reliability of the vehicle heading based on compliance with a criteria for scan line image parameter data associated with one or more crop rows.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: August 4, 2009
    Assignees: Deere & Company, Kansas State University Research Foundation
    Inventors: Jiantao Wei, Shufeng Han
  • Publication number: 20090157259
    Abstract: The present invention is a method for providing guidance towards a far-point position for a vehicle implementing a satellite-based guidance system. The method 200 includes capturing an image 202. The method 200 further includes providing the image in a digital format to an algorithm 204. The method 200 further includes isolating far-point pixelized data of the provided image 206. The method 200 further includes generating data for causing a steering control system of the vehicle implementing the satellite-based guidance system to maintain the vehicle on a straight-line path towards the far-point position 208.
    Type: Application
    Filed: April 16, 2007
    Publication date: June 18, 2009
    Applicant: DEERE & COMPANY
    Inventors: Shufeng Han, Frederick W. Nelson, Terence D. Pickett, John F. Reid
  • Publication number: 20080177449
    Abstract: A system for controlling the position of an agricultural implement coupled to an agricultural vehicle comprises a control unit connected to a field topography database containing three-dimensional data of the topography of a field, a location signal generation arrangement providing location data of the position of the vehicle and/or the implement in the field, an implement position sensor arranged to sense the position of the implement with respect to the ground and to a positioning arrangement configured to move the implement in response to position control signals from the control unit. The control unit is operable to provide the control signals based upon a combination of actual position data received from the implement position sensor and expected required position change data that are derived from elevation data recalled from the field topography database based upon the location data.
    Type: Application
    Filed: January 18, 2007
    Publication date: July 24, 2008
    Inventors: Terence Daniel Pickett, Shufeng Han