Patents by Inventor Dajun Zhou

Dajun Zhou 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: 11285523
    Abstract: A metal blank is clamped between upper and lower binders with the metal blank engaging against a protrusion extending from a binder surface of any of the upper binder, the lower binder, and both upper and lower binders, to create a binder gap between the metal blank and the binder surface adjacent the protrusion. The binder gap prevents cooperating springback control binder elements of the binder surface from actively engaging the metal blank. The metal blank is drawn into a cavity, with the protrusion riding on the metal blank until the protrusion falls off an edge of the metal blank, which closes the binder gap between the metal blank and the binder surface causing the cooperating springback control binder elements to actively engage the blank for the post-forming stretching operation.
    Type: Grant
    Filed: June 27, 2019
    Date of Patent: March 29, 2022
    Assignee: FCA US LLC
    Inventors: Dajun Zhou, Changqing Du, Kaiping Li, Robert D Miller
  • Publication number: 20220040747
    Abstract: A method of forming a metal part that includes placing a metal blank in a stamping apparatus having a first die including a plurality of metal gainers and a second die including a plurality of recesses that correspond to the plurality of metal gainers, and compressing the metal blank such that the metal gainers and the corresponding recesses provide the metal blank with regions of localized stretching. Each of the metal gainers and recesses includes a flat surface such that during the compressing of the metal blank to provide the metal blank with the regions of localized stretching, a strain exerted on the metal blank by the metal gainers and recesses is less than a strain exerted on the metal blank by metal gainers and recesses that do not include the flat surface.
    Type: Application
    Filed: August 6, 2020
    Publication date: February 10, 2022
    Inventors: Dajun Zhou, Chunlei Wang, Robert D Miller
  • Publication number: 20210365782
    Abstract: In a method causing an electronic device to generate a neural network model that controls a game element, a hyperparameter value in a first neural network model is determined from a hyperparameter value set. A structural layer of the first neural network model includes the hyperparameter value, and an output layer, an input layer, and the structural layer are connected in a target connection. A first model accuracy of a second neural network model is obtained by training the first neural network model, and hyperparameter values of some hyperparameters in the first neural network model are updated to corresponding target hyperparameter values if the first model accuracy is lower than a target accuracy.
    Type: Application
    Filed: June 16, 2021
    Publication date: November 25, 2021
    Applicant: Tencent Technology (Shenzhen) Company Limited
    Inventors: Ying HUANG, Dajun ZHOU, Xudong LI
  • Patent number: 10942529
    Abstract: The present disclosure discloses an aircraft (e.g., unmanned aerial obstacle detection method and apparatus, to reduce aircraft obstacle detection errors, and improve aircraft obstacle detection precision. The apparatus performs image collection on a target obstacle by using a binocular camera, to obtain a first image and a second image. After determining a first pixel location obtained by projecting the target obstacle in the first image, and a second pixel location obtained by projecting the target obstacle in the second image, the apparatus calculates a disparity between the first pixel location and the second pixel location and a depth value between the binocular camera and the target obstacle according to the disparity and a preset disparity-to-depth mapping matrix, to detect whether a flight direction of the aircraft is blocked by an obstacle.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: March 9, 2021
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Ying Huang, Dajun Zhou
  • Patent number: 10933458
    Abstract: A stamping press binder assembly for forming a finished stamped product from a blank includes an upper die for at least partially forming the finished stamped product, a stationary punch, an inner lower binder, and an outer lower binder. The inner and outer lower binders are both supported by a single cushion.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: March 2, 2021
    Assignee: FCA US LLC
    Inventors: Dajun Zhou, Changqing Du, Robert D Miller, Richard J Siemen
  • Publication number: 20200406327
    Abstract: A metal blank is clamped between upper and lower binders with the metal blank engaging against a protrusion extending from a binder surface of any of the upper binder, the lower binder, and both upper and lower binders, to create a binder gap between the metal blank and the binder surface adjacent the protrusion. The binder gap prevents cooperating springback control binder elements of the binder surface from actively engaging the metal blank. The metal blank is drawn into a cavity, with the protrusion riding on the metal blank until the protrusion falls off an edge of the metal blank, which closes the binder gap between the metal blank and the binder surface causing the cooperating springback control binder elements to actively engage the blank for the post-forming stretching operation.
    Type: Application
    Filed: June 27, 2019
    Publication date: December 31, 2020
    Inventors: Dajun Zhou, Changqing Du, Kaiping Li, Robert D. Miller
  • Publication number: 20200391326
    Abstract: Segment openings are formed in a metal sheet separated by uncut sections at a first processing station, which define an inner blank portion of the metal flow opening. At a second processing station, the uncut sections and the inner blank portion initially transfer stress around the segment openings and across the interior flow opening during a forming operation. During the forming operation, a protrusion of one mold member contacts a first side of the inner blank portion of the interior flow opening. In addition, another mold member is contact the opposite side of the metal sheet so that the mold members cooperate to separate all but one of the uncut sections by which the inner blank portion remains attached to the metal sheet. In this way, the interior metal flow opening is completed without piercing the metal sheet at the second processing station during the forming operation.
    Type: Application
    Filed: June 12, 2019
    Publication date: December 17, 2020
    Inventors: Dajun Zhou, Thomas W Cox, Kaiping Li, Yongjun Zhou, Richard Siemen, Robert D Miller
  • Publication number: 20200362426
    Abstract: A laser beam is scanned along spaced apart side-by-side laser tracks to form corresponding spaced apart side-by-side hardened metal tracks across a binder surface of the forming die. Each hardened metal track is oriented to extend longitudinally in a direction that is normal to the metal flow direction across the binder surface during a sheet metal forming operation. The scanning forms the corresponding hardened metal tracks across the binder surface without needing to perform a post-hardening machining operation on the sheet metal forming die to remove distortion caused by the laser hardening process.
    Type: Application
    Filed: May 17, 2019
    Publication date: November 19, 2020
    Inventors: Dajun Zhou, Yongjun Zhou, Robert D. Miller
  • Patent number: 10795379
    Abstract: Aspects of the disclosure provide a method for flight control and a control apparatus for flight control. In an example, a first aircraft includes the control apparatus for flight control and the control apparatus includes interface circuitry and processing circuitry. The interface circuitry receives a first flight control instruction and a flight parameter. The first flight control instruction and the flight parameter are sent by a mobile terminal device. The flight parameter is indicative of a preset flight altitude. In response to the first flight control instruction, the processing circuitry controls the first aircraft to fly to the preset flight altitude. Further, the processing circuitry detects an existence of a second aircraft within a surrounding of the first aircraft, and adjusts a flight posture of the first aircraft according to the existence detection of the second aircraft within the surrounding of the first aircraft.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: October 6, 2020
    Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Dajun Zhou, Junfeng Shen, Bin Wang, Xuefeng Wei
  • Patent number: 10786842
    Abstract: A method of forming a finished stamped product includes positioning a blank on a blank holder between an upper die and a lower die, inserting a movable wedge block between the blank holder and the upper die to establish a first binder gap, and while the movable wedge block is inserted, performing a first strike of the blank by lowering the upper die a first distance to contact and partially form the blank, the movable wedge block limiting downward movement of the upper die relative to the lower die. After the first strike, withdrawing the movable wedge block to establish a second binder gap between the blank holder and the upper die, and while the movable wedge block is withdrawn, performing a second strike of the blank by lowering the upper die a second distance to finally form the blank into the finished product.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: September 29, 2020
    Assignee: FCA US LLC
    Inventors: Dajun Zhou, Changqing Du, Robert D Miller
  • Publication number: 20200197997
    Abstract: A stamping press binder assembly for forming a finished stamped product from a blank includes an upper die for at least partially forming the finished stamped product, a stationary punch, an inner lower binder, and an outer lower binder. The inner and outer lower binders are both supported by a single cushion.
    Type: Application
    Filed: December 19, 2018
    Publication date: June 25, 2020
    Inventors: Dajun Zhou, Changqing Du, Robert D Miller, Richard J Siemen
  • Patent number: 10668516
    Abstract: A sheet metal material is stamped into a formed shape having a side wall between a central portion and a flange portion. The central portion is held between an upper pad and a die, and the flange portion is held between an upper binder and a lower binder. A post-stamping compression force is applied along a length of the side wall of the formed shape. For example, application of the post-stamping compression force includes moving the lower binder relatively toward the upper pad, such as by delaying a return of the upper pad during a portion of a return of the lower binder. During application of the post-stamping compression force, an outward force is applied against an inner surface of the side wall to insure any bowing of the side wall is in an outward direction.
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: June 2, 2020
    Assignee: FCA US LLC
    Inventors: Dajun Zhou, Changqing Du
  • Publication number: 20200078846
    Abstract: A method of forming a finished stamped product includes positioning a blank on a blank holder between an upper die and a lower die, inserting a movable wedge block between the blank holder and the upper die to establish a first binder gap, and while the movable wedge block is inserted, performing a first strike of the blank by lowering the upper die a first distance to contact and partially form the blank, the movable wedge block limiting downward movement of the upper die relative to the lower die. After the first strike, withdrawing the movable wedge block to establish a second binder gap between the blank holder and the upper die, and while the movable wedge block is withdrawn, performing a second strike of the blank by lowering the upper die a second distance to finally form the blank into the finished product.
    Type: Application
    Filed: September 12, 2018
    Publication date: March 12, 2020
    Inventors: Dajun Zhou, Changqing Du, Robert D. Miller
  • Patent number: 10408296
    Abstract: A metal stamping tool includes a hybrid magnetorheological-nitrogen spring including a housing having an interior wall defining an interior volume. A fixed divider separates the interior volume into a nitrogen gas chamber and a magnetorheological fluid chamber. A piston extends into both the nitrogen gas chamber and the magnetorheological fluid chamber. The piston defines a magnetorheological fluid gap within the magnetorheological fluid chamber. An electric coil positioned adjacent the fluid gap to apply a magnetic field to magnetorheological fluid within the fluid gap when the electric coil is energized.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: September 10, 2019
    Assignee: FCA US LLC
    Inventor: Dajun Zhou
  • Publication number: 20190206073
    Abstract: The present disclosure discloses an aircraft (e.g., unmanned aerial obstacle detection method and apparatus, to reduce aircraft obstacle detection errors, and improve aircraft obstacle detection precision. The apparatus performs image collection on a target obstacle by using a binocular camera, to obtain a first image and a second image. After determining a first pixel location obtained by projecting the target obstacle in the first image, and a second pixel location obtained by projecting the target obstacle in the second image, the apparatus calculates a disparity between the first pixel location and the second pixel location and a depth value between the binocular camera and the target obstacle according to the disparity and a preset disparity-to-depth mapping matrix, to detect whether a flight direction of the aircraft is blocked by an obstacle.
    Type: Application
    Filed: March 7, 2019
    Publication date: July 4, 2019
    Inventors: Ying HUANG, Dajun ZHOU
  • Patent number: 10328504
    Abstract: In a first stage or operation, at least one shear initiation breakthrough opening is formed through the ultra-high strength material sheet at an interior location. A leading terminal end of each of at least two inclined shearing edges of an interior opening shearing tool is positioned in the at least one shear initiation breakthrough opening. The interior opening shearing tool is different from the breakthrough opening forming tool. In a second stage or operation, shearing of the material is initiated from the at least one shear initiation breakthrough opening by advancing the at least two inclined shearing edges of the interior opening shearing tool against the ultra-high strength material sheet and relative to a corresponding shearing tool.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: June 25, 2019
    Assignee: FCA US LLC
    Inventors: Dajun Zhou, Changqing Du, Robert D Miller
  • Publication number: 20180373271
    Abstract: Aspects of the disclosure provide a method for flight control and a control apparatus for flight control. In an example, a first aircraft includes the control apparatus for flight control and the control apparatus includes interface circuitry and processing circuitry. The interface circuitry receives a first flight control instruction and a flight parameter. The first flight control instruction and the flight parameter are sent by a mobile terminal device. The flight parameter is indicative of a preset flight altitude. In response to the first flight control instruction, the processing circuitry controls the first aircraft to fly to the preset flight altitude. Further, the processing circuitry detects an existence of a second aircraft within a surrounding of the first aircraft, and adjusts a flight posture of the first aircraft according to the existence detection of the second aircraft within the surrounding of the first aircraft.
    Type: Application
    Filed: June 12, 2018
    Publication date: December 27, 2018
    Applicant: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
    Inventors: Dajun Zhou, Junfeng Shen, Bin Wang, Xuefeng Wei
  • Publication number: 20180154420
    Abstract: In a first stage or operation, at least one shear initiation breakthrough opening is formed through the ultra-high strength material sheet at an interior location. A leading terminal end of each of at least two inclined shearing edges of an interior opening shearing tool is positioned in the at least one shear initiation breakthrough opening. The interior opening shearing tool is different from the breakthrough opening forming tool. In a second stage or operation, shearing of the material is initiated from the at least one shear initiation breakthrough opening by advancing the at least two inclined shearing edges of the interior opening shearing tool against the ultra-high strength material sheet and relative to a corresponding shearing tool.
    Type: Application
    Filed: December 2, 2016
    Publication date: June 7, 2018
    Inventors: Dajun Zhou, Changqing Du, Robert D. Miller
  • Publication number: 20180071807
    Abstract: A binder assembly for stamping sheet material includes an upper die, a stationary punch, an outer ring, and an inner ring. The stationary punch is aligned to be received inside a cavity of the upper die. The outer ring and the inner ring extend around the punch and are movable relative thereto. The inner ring includes teeth on a top surface and is positioned an initial distance from an end of the punch. The upper die is driven along the punch the initial distance such that the punch is received inside the cavity of the upper die a partial distance and a remaining distance such that the punch is received inside the cavity of the upper die a deeper distance.
    Type: Application
    Filed: September 15, 2016
    Publication date: March 15, 2018
    Inventors: John F Siekirk, III, Dajun Zhou, Changqing Du, Robert D. Miller
  • Patent number: 9914164
    Abstract: A binder assembly for stamping sheet material includes an upper die, a stationary punch, an outer ring, and an inner ring. The stationary punch is aligned to be received inside a cavity of the upper die. The outer ring and the inner ring extend around the punch and are movable relative thereto. The inner ring includes teeth on a top surface and is positioned an initial distance from an end of the punch. The upper die is driven along the punch the initial distance such that the punch is received inside the cavity of the upper die a partial distance and a remaining distance such that the punch is received inside the cavity of the upper die a deeper distance.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: March 13, 2018
    Assignee: FCA US LLC
    Inventors: John F Siekirk, III, Dajun Zhou, Changqing Du, Robert D Miller