Patents by Inventor Sekhar C. Tangirala

Sekhar C. Tangirala 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).

  • Passive underwater odometry using a video camera
    Patent number: 10227119
    Abstract: Systems and methods are described where odometry information that is obtained from a video camera mounted on an underwater vehicle is used to estimate the velocity of the underwater vehicle. The techniques described herein estimate the velocity of the underwater vehicle passively without emitting sound or other energy from the underwater vehicle.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: March 12, 2019
    Assignee: Lockheed Martin Corporation
    Inventors: Firooz A. Sadjadi, Sekhar C. Tangirala
  • PASSIVE UNDERWATER ODOMETRY USING A VIDEO CAMERA
    Publication number: 20170301098
    Abstract: Systems and methods are described where odometry information that is obtained from a video camera mounted on an underwater vehicle is used to estimate the velocity of the underwater vehicle. The techniques described herein estimate the velocity of the underwater vehicle passively without emitting sound or other energy from the underwater vehicle.
    Type: Application
    Filed: April 17, 2017
    Publication date: October 19, 2017
    Inventors: Firooz A. SADJADI, Sekhar C. TANGIRALA
  • Estimating position and orientation of an underwater vehicle based on correlated sensor data
    Patent number: 8965682
    Abstract: A method and system are described that can be used for combining two sources of position and orientation (pose) information where the information from one source is correlated with the information from the other and the sources produce information at differing rates. For example, the method and system allow for estimating position and orientation (pose) of an underwater vehicle relative to underwater structures by combining pose information computed from a 3D imaging sonar with pose information from a vehicle navigation system. To combine the information from the two sources, a determination is made as to whether to generate a forward prediction of the pose estimate of one of the sources relative to the other, and generating the forward prediction if needed. An updated pose of the underwater vehicle is determined based on the fused pose estimate, and which is used for vehicle guidance and control.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: February 24, 2015
    Assignee: Lockheed Martin Corporation
    Inventors: Sekhar C. Tangirala, Walter K. Feldman, I, Christian H. Debrunner
  • ESTIMATING POSITION AND ORIENTATION OF AN UNDERWATER VEHICLE BASED ON CORRELATED SENSOR DATA
    Publication number: 20120101715
    Abstract: A method and system are described that can be used for combining two sources of position and orientation (pose) information where the information from one source is correlated with the information from the other and the sources produce information at differing rates. For example, the method and system allow for estimating position and orientation (pose) of an underwater vehicle relative to underwater structures by combining pose information computed from a 3D imaging sonar with pose information from a vehicle navigation system. To combine the information from the two sources, a determination is made as to whether to generate a forward prediction of the pose estimate of one of the sources relative to the other, and generating the forward prediction if needed. An updated pose of the underwater vehicle is determined based on the fused pose estimate, and which is used for vehicle guidance and control.
    Type: Application
    Filed: October 25, 2011
    Publication date: April 26, 2012
    Applicant: LOCKHEED MARTIN CORPORATION
    Inventors: Sekhar C. Tangirala, Walter K. Feldman, I, Christian H. Debrunner