Patents by Inventor James Z. Liu

James Z. Liu 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: 12127497
    Abstract: A row unit for a seeding machine includes a ground view sensor coupled to the frame. The ground view sensor is operable to sense the furrow and generate depth signals corresponding to actual sensed depth of the furrow. The row unit also includes a controller configured to receive the signals, and a downforce adjustment mechanism coupled to the frame and to the controller. The controller is configured to activate the downforce adjustment mechanism to adjust a downforce on the frame based on the signals received by the controller.
    Type: Grant
    Filed: December 14, 2021
    Date of Patent: October 29, 2024
    Assignee: DEERE & COMPANY
    Inventors: Jason D. Walter, Michael E. Frasier, Lawrence D. Green, James Z. Liu, Donald K. Landphair
  • Patent number: 12004284
    Abstract: Various methods and systems are provided for medical imaging systems. In one example, an imaging system comprises: a C-shaped gantry; an x-ray tube coupled to a first end of the C-shaped gantry; an x-ray detector coupled to a second end of the C-shaped gantry, opposite to the x-ray tube; and a controller with computer readable instructions stored on non-transitory memory that when executed, cause the controller to: identify a reference image; determine a target electrical current based on the reference image; determine a corrected electrical current based on the target electrical current; and transition an electrical current provided to the x-ray tube to the target electrical current by commanding the electrical current to the corrected electrical current while maintaining a constant voltage provided to the x-ray tube.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: June 4, 2024
    Assignee: GE Precision Healthcare LLC
    Inventors: James Z. Liu, Russell Dibb, Naveen S. Chandra
  • Publication number: 20230126216
    Abstract: Various methods and systems are provided for medical imaging systems. In one example, an imaging system comprises: a C-shaped gantry; an x-ray tube coupled to a first end of the C-shaped gantry; an x-ray detector coupled to a second end of the C-shaped gantry, opposite to the x-ray tube; and a controller with computer readable instructions stored on non-transitory memory that when executed, cause the controller to: identify a reference image; determine a target electrical current based on the reference image; determine a corrected electrical current based on the target electrical current; and transition an electrical current provided to the x-ray tube to the target electrical current by commanding the electrical current to the corrected electrical current while maintaining a constant voltage provided to the x-ray tube.
    Type: Application
    Filed: October 21, 2021
    Publication date: April 27, 2023
    Inventors: James Z. Liu, Russell Dibb, Naveen S. Chandra
  • Publication number: 20220217898
    Abstract: A seed sensor senses seeds on a row unit and generates a seed sensor signal. A number of planting characteristics, such as a seed orientation, seed slugging, delivery system wear, and seed abnormalities, can be detected based on the seed sensor signal. The planter can be controlled based on the detected planting characteristics.
    Type: Application
    Filed: March 15, 2022
    Publication date: July 14, 2022
    Inventors: Jason D. WALTER, James Z. Liu
  • Publication number: 20220174859
    Abstract: A row unit for a seeding machine includes a ground view sensor coupled to the frame. The ground view sensor is operable to sense the furrow and generate depth signals corresponding to actual sensed depth of the furrow. The row unit also includes a controller configured to receive the signals, and a downforce adjustment mechanism coupled to the frame and to the controller. The controller is configured to activate the downforce adjustment mechanism to adjust a downforce on the frame based on the signals received by the controller.
    Type: Application
    Filed: December 14, 2021
    Publication date: June 9, 2022
    Inventors: Jason D. Walter, Michael E. Frasier, Lawrence D. Green, James Z. Liu, Donald K. Landphair
  • Patent number: 11284559
    Abstract: A seed sensor senses seeds on a row unit and generates a seed sensor signal. A number of planting characteristics, such as a seed orientation, seed slugging, delivery system wear, and seed abnormalities, can be detected based on the seed sensor signal. The planter can be controlled based on the detected planting characteristics.
    Type: Grant
    Filed: June 11, 2019
    Date of Patent: March 29, 2022
    Assignee: Deere & Company
    Inventors: Jason D. Walter, James Z. Liu
  • Patent number: 11202404
    Abstract: A row unit for a seeding machine includes a ground view sensor coupled to the frame. The ground view sensor is operable to sense the furrow and generate depth signals corresponding to actual sensed depth of the furrow. The row unit also includes a controller configured to receive the signals, and a downforce adjustment mechanism coupled to the frame and to the controller. The controller is configured to activate the downforce adjustment mechanism to adjust a downforce on the frame based on the signals received by the controller.
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: December 21, 2021
    Assignee: DEERE & COMPANY
    Inventors: Jason D. Walter, Michael E. Frasier, Lawrence D. Green, James Z. Liu, Donald K. Landphair
  • Publication number: 20200390026
    Abstract: A seed sensor senses seeds on a row unit and generates a seed sensor signal. A number of planting characteristics, such as a seed orientation, seed slugging, delivery system wear, and seed abnormalities, can be detected based on the seed sensor signal. The planter can be controlled based on the detected planting characteristics.
    Type: Application
    Filed: June 11, 2019
    Publication date: December 17, 2020
    Inventors: Jason D. Walter, James Z. Liu
  • Publication number: 20200281111
    Abstract: A row unit for a seeding machine includes a ground view sensor coupled to the frame. The ground view sensor is operable to sense the furrow and generate depth signals corresponding to actual sensed depth of the furrow. The row unit also includes a controller configured to receive the signals, and a downforce adjustment mechanism coupled to the frame and to the controller. The controller is configured to activate the downforce adjustment mechanism to adjust a downforce on the frame based on the signals received by the controller.
    Type: Application
    Filed: March 5, 2019
    Publication date: September 10, 2020
    Inventors: Jason D. Walter, Michael E. Frasier, Lawrence D. Green, James Z. Liu, Donald K. Landphair
  • Patent number: 10143128
    Abstract: A seeding machine includes a main frame, and a row unit coupled to the main frame. The row unit has a row unit frame, a gauge wheel coupled to the row unit frame, and a furrow opener coupled to the row unit frame, the furrow opener having a stationary or rotating surface that contacts and moves soil. The row unit also includes a furrow closer, the furrow closer having a stationary or rotating surface that contacts and presses soil. The seeding machine also includes a downforce adjustment system for adjusting an amount of downforce applied to the row unit, the downforce adjustment system including a moisture sensor, a controller configured to receive a signal from the moisture sensor, and an actuator configured to change the amount of downforce applied to the row unit based on the signal received by the controller.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: December 4, 2018
    Assignee: DEERE & COMPANY
    Inventors: Donald K. Landphair, Michael E. Frasier, James Z. Liu, Jason D. Walter, Lawrence D. Green
  • Patent number: 9883626
    Abstract: A variable is sensed that is indicative of a performance of a machine. A rate of change of the sensed variable is determined, and a control signal is generated for controlling an agricultural vehicle, based upon the rate of change in the value of the sensed variable.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: February 6, 2018
    Assignee: Deere & Company
    Inventors: Brianna L. Heim, Charles T. Graham, James R. Peterson, Donald Landphair, James Z. Liu
  • Publication number: 20170265377
    Abstract: A seeding machine includes a main frame, and a row unit coupled to the main frame. The row unit has a row unit frame, a gauge wheel coupled to the row unit frame, and a furrow opener coupled to the row unit frame, the furrow opener having a stationary or rotating surface that contacts and moves soil. The row unit also includes a furrow closer, the furrow closer having a stationary or rotating surface that contacts and presses soil. The seeding machine also includes a downforce adjustment system for adjusting an amount of downforce applied to the row unit, the downforce adjustment system including a moisture sensor, a controller configured to receive a signal from the moisture sensor, and an actuator configured to change the amount of downforce applied to the row unit based on the signal received by the controller.
    Type: Application
    Filed: June 8, 2017
    Publication date: September 21, 2017
    Inventors: Donald K. Landphair, Michael E. Frasier, James Z. Liu, Jason D. Walter, Lawrence D. Green
  • Patent number: 9675004
    Abstract: A seeding machine includes a main frame, and a row unit coupled to the main frame. The row unit has a row unit frame, a gauge wheel coupled to the row unit frame, and a furrow opener coupled to the row unit frame, the furrow opener having a stationary or rotating surface that contacts and moves soil. The row unit also includes a furrow closer, the furrow closer having a stationary or rotating surface that contacts and presses soil. The seeding machine also includes a downforce adjustment system for adjusting an amount of downforce applied to the row unit, the downforce adjustment system including a moisture sensor, a controller configured to receive a signal from the moisture sensor, and an actuator configured to change the amount of downforce applied to the row unit based on the signal received by the controller.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: June 13, 2017
    Assignee: Deere & Company
    Inventors: Donald K. Landphair, Michael E. Frasier, James Z. Liu, Jason D. Walter, Lawrence D. Green
  • Publication number: 20170094894
    Abstract: A variable is sensed that is indicative of a performance of a machine. A rate of change of the sensed variable is determined, and a control signal is generated for controlling an agricultural vehicle, based upon the rate of change in the value of the sensed variable.
    Type: Application
    Filed: October 2, 2015
    Publication date: April 6, 2017
    Inventors: Brianna L. Heim, Charles T. Graham, James R. Peterson, Donald Landphair, James Z. Liu
  • Publication number: 20170086361
    Abstract: A seeding machine includes a main frame, and a row unit coupled to the main frame. The row unit has a row unit frame, a gauge wheel coupled to the row unit frame, and a furrow opener coupled to the row unit frame, the furrow opener having a stationary or rotating surface that contacts and moves soil. The row unit also includes a furrow closer, the furrow closer having a stationary or rotating surface that contacts and presses soil. The seeding machine also includes a downforce adjustment system for adjusting an amount of downforce applied to the row unit, the downforce adjustment system including a moisture sensor, a controller configured to receive a signal from the moisture sensor, and an actuator configured to change the amount of downforce applied to the row unit based on the signal received by the controller.
    Type: Application
    Filed: September 30, 2015
    Publication date: March 30, 2017
    Inventors: Donald K. Landphair, Michael E. Frasier, James Z. Liu, Jason D. Walter, Lawrence D. Green
  • Patent number: 9043949
    Abstract: A system and method of calibrating a meter of a product distribution machine, such as an agricultural air seeder is shown. The system uses one or both of optical and mass flow sensors to measure the product flow rate. The sensors are used to measure mass flow rate during a calibration process while the machine is in use. To improve sensor accuracy during the calibration process, the meter speed is changed to change the product flow rate to a rate at which the sensor accuracy is increased.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: June 2, 2015
    Assignee: DEERE & COMPANY
    Inventors: James Z. Liu, Donald K. Landphair
  • Patent number: 8941070
    Abstract: An imaging system is provided. In one embodiment, an imaging system includes a radiation source and a digital detector. The imaging system may also include first and second structures, each configured to receive the digital detector. Further, the imaging system may include system control circuitry configured to control exposure of the digital detector by the radiation source and to acquire image data from the digital detector. Additionally, the digital detector may be configured to communicate its location to the system control circuitry based on receipt of the digital detector by the first or second receiving structures. Additional systems, methods, and devices are also disclosed.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: January 27, 2015
    Assignee: General Electric Company
    Inventors: Scott W. Petrick, Alan D. Blomeyer, James Z. Liu, Emad Abu Tabanjeh
  • Patent number: 8695396
    Abstract: A product distribution apparatus, shown in the form of an agricultural air seeder is disclosed having sensors to measure the mass flow through the distribution system, sensors to weigh the tank and the product therein, and sensors to measure the quantity of product in the tank. The sensors are used to measure the change in the quantity of product in the tank during a calibration process where the apparatus is operated over an area and the number of rotations of the meter are recorded. The data is then used to determine a mass flow rate per revolution of the meter. A monitoring method is also disclosed in which an ‘area to empty’ and ‘product needed’ to complete a field or task is displayed to the operator.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: April 15, 2014
    Assignee: Deere & Company
    Inventors: Donald K Landphair, James Z. Liu, Lawrence D. Green, James J. Phelan, Samuel Santiago
  • Publication number: 20140076217
    Abstract: A system and method of calibrating a meter of a product distribution machine, such as an agricultural air seeder is shown. The system uses one or both of optical and mass flow sensors to measure the product flow rate. The sensors are used to measure mass flow rate during a calibration process while the machine is in use. To improve sensor accuracy during the calibration process, the meter speed is changed to change the product flow rate to a rate at which the sensor accuracy is increased.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 20, 2014
    Inventors: JAMES Z. LIU, Donald K. Landphair
  • Publication number: 20140076047
    Abstract: An apparatus and method for measuring the quantity of material in a tank such as a commodity air cart of an air seeder in which a sensor or sensors are used to measure the distance to the surface of the material. The distance data is then used to determine a surface profile of the material from which the volume of material is calculated. The volume is converted to weight using known material density information.
    Type: Application
    Filed: September 14, 2012
    Publication date: March 20, 2014
    Inventor: JAMES Z. LIU