Patents by Inventor Dong An

Dong An 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: 20030004642
    Abstract: A method and system for collision avoidance, carried by each aircraft, includes a miniature MEMS (MicroElectroMechanical Systems) IMU (Inertial Measurement Unit), a miniature GPS (Global Positioning System) receiver, a display, a data link receiver/transmitter, and a central processing system. Each aircraft carries a GPS receiver coupled with a self-contained miniature IMU for uninterrupted position determination. This position information is shared with other aircraft over an RF (Radio Frequency) data link. An intelligent display shows the relative positions of the aircraft in the immediate vicinity of the host aircraft and issues voice and flashing warnings if a collision hazard exists. This system provides situational awareness to the pilot and enhances the safety of flight.
    Type: Application
    Filed: June 24, 2002
    Publication date: January 2, 2003
    Inventors: Ching-Fang Lin, Dong An
  • Publication number: 20020180636
    Abstract: A passive ranging/tracking processing method provides information from passive sensors and associated tracking control devices and GPS/IMU integrated navigation system, so as to produce three dimensional position and velocity information of a target. The passive ranging/tracking processing method includes the procedure of producing two or more sets of direction measurements of a target with respect to a carrier, such as sets of elevation and azimuth angles, from two or more synchronized sets of passive sensors and associated tracking control devices, installed on different locations of the carrier, computing the range vector measurement of the target with respect to the carrier using the two or more sets of direction measurements, and filtering the range vector measurement to estimate the three-dimensional position and velocity information of the target.
    Type: Application
    Filed: April 23, 2001
    Publication date: December 5, 2002
    Inventors: Ching-Fang Lin, Dong An
  • Patent number: 6489922
    Abstract: A passive ranging/tracking processing method provides information from passive sensors and associated tracking control devices and GPS/IMU integrated navigation system, so as to produce three dimensional position and velocity information of a target. The passive ranging/tracking processing method includes the procedure of producing two or more sets of direction measurements of a target with respect to a carrier, such as sets of elevation and azimuth angles, from two or more synchronized sets of passive sensors and associated tracking control devices, installed on different locations of the carrier, computing the range vector measurement of the target with respect to the carrier using the two or more sets of direction measurements, and filtering the range vector measurement to estimate the three-dimensional position and velocity information of the target.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: December 3, 2002
    Assignee: American GNC Corporation
    Inventors: Ching-Fang Lin, Dong An
  • Patent number: 6480152
    Abstract: An integrated Global Positioning System (GPS)/Inertial Measurement Unit (IMU) method and MicroSystem is disclosed, wherein data from an IMU, a MEMS IMU preferred, a GPS chipset, and an earth magnetic field detector are mixed in a mixed GPS/IMU/Magnetic Data microprocessor to achieve a low cost, micro size, and low power consumption mixed GPS/IMU/magnetic position, velocity, and attitude solution. Furthermore, to deal with sensitivity of the MEMS inertial sensors to environment temperature, a temperature based scheduler, error estimator, and a current acting error estimator are co-operated to minimize the mismatching between the filter system modules and the actual ones due to change of environment temperature, so that the system of the present invention can provide high performance and stable navigation solution over a wide range of environment temperature.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: November 12, 2002
    Assignee: American GNC Corporation
    Inventors: Ching-Fang Lin, Dong An
  • Publication number: 20020149319
    Abstract: A PDP module packing apparatus includes PDP module packing units, each unit including a support member and a coupling unit for coupling a PDP module to a respective support member for supporting and preventing deformation of the PDP module; and shock absorbing units for receiving and supporting several PDP module packing units, a respective shock absorbing unit being locatable at each of upper and lower ends of the PDP module packing units and receiving one of the upper and lower ends for maintaining spacing between PDP module packing units, and absorbing mechanical shock. Thus, PDP modules can be safely shipped to a destination without receiving external vibration and shock in the PDP module packing apparatus.
    Type: Application
    Filed: January 25, 2002
    Publication date: October 17, 2002
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Ki-Jung Kim, Eui-Seon Jeong, Guy-Sung Kim, Dong-An Kim, Je-Hee Mun, Yeung-Ki Kim
  • Publication number: 20020147527
    Abstract: A system and method for precision operational control of automated machines includes a motion element, an IMU installed at an end effector of the motion element for sensing and providing a motion measurement of the motion element, a central control processor receiving output of the IMU and producing commands, and a motion actuator receiving the commands from the central control processor to control the movement of the end effector of the motion element, so as to enable autonomous/intelligent control of the automated machine's end effector by incorporating the IMU to permit direct servo-control of the end effector's acceleration, velocity, angular rate, and angle—this closed-loop system minimizes effects of such disturbances like mechanical flexing and bending due to loading and nonlinear torques due to hydraulic components.
    Type: Application
    Filed: February 6, 2002
    Publication date: October 10, 2002
    Inventors: Hiram McCall, Ching-Fang Lin, Dong An, ZongKe Li
  • Patent number: 6463357
    Abstract: A system and method for precision operational control of automated machines includes a motion element, an IMU (Inital Measuring Unit) installed at an end effector of the motion element for sensing and providing a motion measurement of the motion element, a central control processor receiving output of the IMU and producing commands, and a motion actuator receiving the commands from the central control processor to control the movement of the end effector of the motion element, so as to enable autonomous/intelligent control of the automated machine's end effector by incorporating the IMU to permit direct servo-control of the end effector's acceleration, velocity, angular rate. and angle—this closed-loop system minimizes effects of such disturbances like mechanical flexing and bending due to loading and nonlinear torques due to hydraulic components.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: October 8, 2002
    Assignee: American GNC Corporation
    Inventors: Dong An, ZongKe Li, Hiram McCall, Ching-Fang Lin
  • Patent number: 6408245
    Abstract: A filtering mechanization method is provided for integrating a Global positioning System receiver with an Inertial Measurement Unit to produce highly accurate and highly reliable mixed GPS/IMU position, velocity, and attitude information of a carrier. The GPS filtered position and velocity data are first individually used as measurements of the two local filters to produce estimates of two sets of the local state vector. Then, the estimates of the two sets of local state vectors are mixed by a master filter device to produce global optimal estimates of master state vector including INS (Inertial Navigation System) navigation parameter errors, inertial sensor errors, and GPS correlated position and velocity errors. The estimates of the two sets of local state vector and master state vector are analyzed by a GPS failure detection/isolation logic module to prevent the mixed GPS/IMU position, velocity, and attitude information from becoming contaminated by undetected GPS failures.
    Type: Grant
    Filed: January 22, 2001
    Date of Patent: June 18, 2002
    Assignee: American GNC Corporation
    Inventors: Dong An, Ching-Fang Lin
  • Publication number: 20020059027
    Abstract: The present invention provides a digital signal processing method and system thereof for producing precision platform orientation measurements and local Earth's magnetic measurements by measuring threes axes gravity acceleration digital signals by an acceleration producer, detecting Earth's magnetic field vector measurement by an Earth's magnetic field detector to achieve digital three-axes Earth's magnetic field vector signals, and producing pitch, roll, and heading angles using said three-axes gravity acceleration digital signals and said digital three-axes Earth magnetic field vector signals by a Digital Signal Processor (DSP) chipset.
    Type: Application
    Filed: September 4, 2001
    Publication date: May 16, 2002
    Inventors: Dong An, Ching-Fang Lin
  • Publication number: 20020021245
    Abstract: An integrated Global Positioning System (GPS)/Inertial Measurement Unit (IMU) method and MicroSystem is disclosed, wherein data from an IMU, a MEMS IMU preferred, a GPS chipset, and an earth magnetic field detector are mixed in a mixed GPS/IMU/Magnetic Data microprocessor to achieve a low cost, micro size, and low power consumption mixed GPS/IMU/magnetic position, velocity, and attitude solution. Furthermore, to deal with sensitivity of the MEMS inertial sensors to environment temperature, a temperature based scheduler, error estimator, and a current acting error estimator are co-operated to minimize the mismatching between the filter system modules and the actual ones due to change of environment temperature, so that the system of the present invention can provide high performance and stable navigation solution over a wide range of environment temperature.
    Type: Application
    Filed: July 20, 2001
    Publication date: February 21, 2002
    Inventors: Ching-Fang Lin, Dong An
  • Patent number: 4935639
    Abstract: A revolving power tower comprising a fixed tower and a revolving tower, to make use of wind power as main power source and the heat energy of the sun as supplementary power source, said revolving tower being to induce the wind from all directions to run into the present power tower; when the outer heat-absorbing plates and the bottom of the tower being heated by the scorching sun, the inner temperature being to rise; when the wind coming from outside the heat-absorbing plates being to introduce hot air current into the flexible air valve to blow toward the upper-right portion of the non-weight revolving tower to push the blades of the revolving tower to rotate rightward, (at the same time, the bottom air turbine and the electric generator being to start operating) and then, the air current running into the inner portion of the tower, the wind driven by the blades of the air turbine being to circle round and round and to rush out of the tower from the top to form an artificial whirlwind; like natural tornade,
    Type: Grant
    Filed: August 23, 1988
    Date of Patent: June 19, 1990
    Inventor: Dong-An Yeh